WO2018105376A1

WO2018105376A1 - Liquid crystal composition, liquid crystal display element, and liquid crystal display

Info

Publication number: WO2018105376A1
Application number: PCT/JP2017/041787
Authority: WO
Inventors: 和樹栗沢
Original assignee: Dic株式会社
Priority date: 2016-12-06
Filing date: 2017-11-21
Publication date: 2018-06-14
Also published as: JP2020023592A

Abstract

Provided are: a liquid crystal composition that has a small rotational viscosity (γ₁) and in which the value of dielectric anisotropy (Δε) is negative; a liquid crystal display element that uses the liquid crystal composition and that has a fast response speed; and a liquid crystal display provided with the liquid crystal display element. The liquid crystal composition in which the value of dielectric anisotropy (Δε) is negative contains: one or more compounds represented by general formula (i); one or more compounds selected from the group consisting of compounds represented by general formulas (N-1-1) and (N-1-2); and one or more compounds represented by general formula (ii).

Description

Liquid crystal composition, liquid crystal display element and liquid crystal display

The present invention relates to a liquid crystal composition, a liquid crystal display element, and a liquid crystal display.

A liquid crystal display element includes a liquid crystal layer sandwiched between a pair of substrates, and the liquid crystal layer includes a liquid crystal composition. Such liquid crystal display elements are widely used in image display devices such as liquid crystal televisions, computer monitors, mobile phones, information terminals, and game machines.
As a typical display method of the liquid crystal display element, for example, there are a TN (twisted nematic) type, an STN (super twisted nematic) type, an ECB (field effect birefringence) type, and the like. An active matrix liquid crystal display element using TFTs (thin film transistors) includes a VA type that vertically aligns liquid crystal molecules, an IPS (in-plane switching) type that horizontally aligns liquid crystal molecules, and an FFS (fringe) that is a kind thereof. Field switching) type.
Nematic liquid crystals are used for these liquid crystal display elements, and liquid crystal compositions having a positive or negative dielectric anisotropy (Δε) are used depending on the type of the element.

The liquid crystal composition used for the liquid crystal display element is required to be stable against external factors such as moisture, air, heat, and light. Further, the liquid crystal composition is required to exhibit a liquid crystal phase in a temperature range as wide as possible centering on room temperature, to have low viscosity, and to have a low driving voltage. Furthermore, the liquid crystal composition is composed of several to several tens of compounds in order to optimize the dielectric anisotropy (Δε), the refractive index anisotropy (Δn), etc. according to the individual display elements. It is configured. In addition, from the setting of Δn × d, which is the product of Δn and the cell gap (d), it is necessary to adjust Δn of the liquid crystal composition to an appropriate range according to the cell gap. In addition, when the liquid crystal display element is applied to a television or the like, since high-speed response is important, a liquid crystal composition having a small rotational viscosity (γ ₁ ) is required.

For example, Patent Document 1 discloses a liquid crystal composition having a negative value of dielectric anisotropy (Δε) useful for providing a matrix liquid crystal display having a large specific resistance that enables various halftone displays. Is disclosed.

JP 2010-254998 A

However, the liquid crystal composition disclosed in Patent Document 1 has many examples of negative dielectric anisotropy (Δε) and relatively small refractive index anisotropy (Δn), and has low viscosity and response. Inadequate in terms of speed.

The present invention has been made in view of the above circumstances, and uses a liquid crystal composition having a small rotational viscosity (γ ₁ ) and a negative dielectric anisotropy (Δε), and the liquid crystal composition. It is an object of the present invention to provide a liquid crystal display element having a high response speed and a liquid crystal display including the liquid crystal display element.

The present invention relates to a liquid crystal composition having a negative value of dielectric anisotropy (Δε), and one or more compounds represented by the following general formula (i): -1) and one or more compounds selected from the group consisting of compounds represented by (N-1-2) and one or more compounds represented by the following general formula (ii) The liquid crystal composition characterized by containing this is provided.

(Wherein R ⁱ¹ and R ⁱ² each independently represents an alkenyl group having 2 to 8 carbon atoms,
R ^N111 , R ^N112 , R ^N121 , R ^N122 , R ^ii1, and R ⁱⁱ² each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more adjacent non-adjacent alkyl groups in the alkyl group Each —CH ₂ — may be independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—;
One or more hydrogen atoms in the cyclohexane ring in the general formula (N-1-1) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, One or two or more non-adjacent —CH ₂ — in the alkyl group are each independently —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO. Optionally substituted by-
One hydrogen atom in the benzene ring in the general formula (N-1-1) may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. Or two or more non-adjacent —CH ₂ — are each independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. You may,
One or more hydrogen atoms in the cyclohexane ring in the general formula (N-1-2) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, One or two or more non-adjacent —CH ₂ — in the alkyl group are each independently —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO. Optionally substituted by-
In the general formula (N-1-2), one hydrogen atom in the benzene ring may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. Or two or more non-adjacent —CH ₂ — are each independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. You may,
n ⁱⁱ¹ represents 0 or 1. )

The present invention also provides a liquid crystal display element using the liquid crystal composition.
The present invention also provides a liquid crystal display including the liquid crystal display element.

According to the present invention, a liquid crystal composition having a small rotational viscosity (γ ₁ ), showing a liquid crystal phase in a wide temperature range, and having a negative dielectric anisotropy (Δε) value, and using the liquid crystal composition A liquid crystal display element having a high response speed and a liquid crystal display including the liquid crystal display element are provided.

It is sectional drawing which shows typically the principal part of one Embodiment of the cell used with the liquid crystal display element of this invention. It is sectional drawing which shows typically the principal part of one Embodiment of the cell used with the liquid crystal display element of this invention. It is sectional drawing which shows typically the principal part of other embodiment of the cell used with the liquid crystal display element of this invention. It is a figure which shows typically one Embodiment of the liquid crystal display element of this invention. It is a top view which expands and shows the liquid crystal display element shown in FIG. It is sectional drawing when the liquid crystal display element shown in FIG. 5 is cut | disconnected.

<< Liquid crystal composition >>
The liquid crystal composition of the present invention is a liquid crystal composition having a negative dielectric anisotropy (Δε) value, and one or more compounds represented by the following general formula (i) are represented by the following general formula: One or more compounds selected from the group consisting of compounds represented by (N-1-1) and (N-1-2), and one compound represented by the following general formula (ii) Or it contains 2 or more types, It is characterized by the above-mentioned.

According to the present invention, a liquid crystal composition having a small rotational viscosity (γ ₁ ), showing a liquid crystal phase in a wide temperature range, and having a negative dielectric anisotropy (Δε) value, and using the liquid crystal composition A liquid crystal display element having a high response speed and a liquid crystal display including the liquid crystal display element are provided.
Moreover, as another effect | action and effect of the liquid-crystal composition of this invention, it is mentioned that it is excellent in low-temperature storage stability.

In the present specification, unless otherwise specified, “%” represents “mass%” and “wt%” also represents “mass%”.
“Halogen atom” represents “fluorine atom (F), chlorine atom (Cl), bromine atom or iodine atom (I)”.

In general formula (i), R ⁱ¹ and R ⁱ² each independently represents an alkenyl group having 2 to 8 carbon atoms. R ⁱ¹ and R ⁱ² may each independently be an alkenyl group having 2 to 6 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyl group having 2 to 4 carbon atoms. It may be an alkenyl group having 2 to 3 carbon atoms, an ethenyl group (that is, a vinyl group) or a 1-propenyl group.

The alkenyl group is preferably selected from groups represented by any one of the formulas (R1) to (R5) (a black dot in each formula represents a carbon atom in the ring structure). That is, in the compound represented by the general formula (i), preferred alkenyl groups for R ⁱ¹ and R ⁱ² are each independently selected from the groups represented by any of the formulas (R1) to (R5). .

The compound represented by the general formula (i) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the general formula (i) with respect to the total amount of the composition of the present invention is 1%, 3%, 5%, 7%, 10%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%.

The compound represented by the general formula (i) is preferably a compound represented by the general formula (i-1).

(In the formula, R ⁱ¹¹ and R ⁱ¹² each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.)

In general formula (i-1), R ⁱ¹¹ and R ⁱ¹² may each independently be a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, or a hydrogen atom or an alkyl group having 1 to 2 carbon atoms. It may be a hydrogen atom or a methyl group. In the general formula ^(i-1), at least one of ^{R i11} and ^{R i12} is a hydrogen atom, more preferably from the viewpoint of response ^speed, it ^{R i11} and ^{R i12} is a hydrogen atom, a response speed Particularly preferred from the viewpoint.

The lower limit of the preferable content of the compound represented by the formula (i-1) with respect to the total amount of the composition of the present invention is 1%, 3%, 5%, 7% 10%, 12%, 15%, 17%, 19%, 20%, 23%, 25%, 27%, 30% 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 33%, 30%, 28%, 25%, 23%, 22%, 21%, and 20%.

The compound represented by general formula (i) is preferably a compound selected from the group of compounds represented by general formula (i-1-1) to formula (i-1-8). -1-1) to compounds represented by formula (i-1-6) are preferred, and compounds represented by formulas (i-1-1) to (i-1-3) are preferred. Further preferred are compounds represented by formula (i-1-1).

In formula (N-1-1), R ^N111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a propyl group, a pentyl group or a vinyl group.
In general formula (N-1-1), R ^N112 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, such as an ethoxy group or butoxy Groups are preferred.

The compound represented by the general formula (N-1-1) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

When increasing the absolute value of Δε, it is preferable to set a large amount of content. When emphasizing solubility at low temperatures, setting the content range in the middle is effective, and Tni is important. Is highly effective when the content is set to be small. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-1) with respect to the total amount of the composition of the present invention is 3%, 5%, 10%, 13% , 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% %, 5%, 3%.

Further, the compounds represented by the general formula (N-1-1) are represented by the formulas (N-1-1.1) to (N-1-1.4), (N-1-1.11). Is preferably a compound selected from the group consisting of compounds represented by formula (N-1-1.14) and formula (N-1-1.20) to formula (N-1-1.22), Compounds represented by formulas (N-1-1.1) to (N-1-1.4) are preferred, and formulas (N-1-1.1) and (N-1-1. The compound represented by 3) is preferred.

Formula (N-1-1.1) to Formula (N-1-1.4), Formula (N-1-1.11) to Formula (N-1-1.14), Formula (N-1- The compounds represented by 1.20) to (N-1-1.22) can be used alone or in combination, but the total amount of the composition of the present invention is not limited. The lower limit of preferable content of these compounds alone or 3% is 5%, 10%, 13%, 15%, 17%, 20%, 23% 25% 27% 30% 33% 35% The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% %, 5%, 3%.

In formula (N-1-2), R ^N121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group or a pentyl group.
In general formula (N-1-2), R ^N122 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. Group, propyl group, methoxy group, ethoxy group or propoxy group is preferred.

The compound represented by the general formula (N-1-2) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

When increasing the absolute value of Δε, it is preferable to set a large amount of content. When emphasizing solubility at low temperatures, setting the content range in the middle is effective, and Tni is important. The effect is high when the content is set to be large. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-2) with respect to the total amount of the composition of the present invention is 5%, 7%, 10%, 13% 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, 37% 40% and 42%. The upper limit of the preferable content is 50%, 48%, 45%, 43%, 40%, 38%, and 35% with respect to the total amount of the composition of the present invention. %, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% %, 8%, 7%, 6%, 5%.

Further, the compounds represented by the general formula (N-1-2) are represented by the formula (N-1-2.1) to the formula (N-1-2.7), the formula (N-1-2.10). Is preferably a compound selected from the group of compounds represented by formula (N-1-2.13) and formula (N-1-2.20) to formula (N-1-2.22), Formula (N-1-2.3) to Formula (N-1-2.7), Formula (N-1-2.10), Formula (N-1-2.11), Formula (N-1- 2.13) and a compound represented by formula (N-1-2.20) are preferable. When importance is placed on the improvement of Δε, formula (N-2.3) to formula (N- The compound represented by 1-2.7) is preferable, and when importance is attached to improvement of Tni, the compound represented by formula (N-1-2.10), formula (N-1-2.11) and formula (N-1 -2.13) are preferred. Preferably, the compound represented by the formula (N-1-2.20) is preferable when importance is attached to the improvement in response speed.

Formula (N-1-2.1) to Formula (N-1-2.7), Formula (N-1-2.10) to Formula (N-1-2.13), and Formula (N-1 -2.20) to the compound represented by formula (N-1-2.22) can be used alone or in combination, but the total amount of the composition of the present invention is not limited. The lower limit of the preferable content of these compounds alone or 3% is 3%, 5%, 7%, 10%, 13%, 15%, 17%, 20% %, 23%, 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% %, 5%, 3%.

The compound represented by the general formula (ii) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

When two or more compounds represented by general formula (ii) are used in combination, for example, only two or more compounds having n ⁱⁱ¹ of 0 may be used, or only compounds having n ⁱⁱ¹ of 1 may be used. Two or more types may be used, and one type or two or more types of compounds in which n ⁱⁱ¹ is 0 may be used in combination with one type or two or more types of compounds in which n ⁱⁱ¹ is 1.

The lower limit of the preferable content of the compound represented by the general formula (ii) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (ii) can be classified into a compound represented by the general formula (N-1-10) and a compound represented by the general formula (N-1-11).

(Wherein R ^N1101 and R ^N1102 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

( ^Wherein R ^N1111 and R ^N1112 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

In general formula (N-1-10), R ^N1101 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and may be an ethyl group, a propyl group, a butyl group, a vinyl group or 1- A propenyl group is preferred.
In general formula (N-1-10), R ^N1102 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. Group or butoxy group is preferred.

The compound represented by the general formula (N-1-10) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-10) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compounds represented by the general formula (N-1-10) are represented by the formulas (N-1-10.1) to (N-1-10.5) and (N-1-10.11). ) To a compound selected from the group of compounds represented by formula (N-1-10.14), preferably represented by formulas (N-1-10.1) to (N-1-10.5) The compounds represented by formula (N-1-10.1) and formula (N-1-10.2) are preferred.

The compounds represented by the formula (N-1-10.1) and the formula (N-1-10.2) can be used alone or in combination. The lower limit of the preferable content of these compounds alone or with respect to the total amount is 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

In general formula (N-1-11), R ^N1111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and may be an ethyl group, a propyl group, a butyl group, a vinyl group, or 1- A propenyl group is preferred.
In general formula (N-1-11), R ^N1112 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, such as an ethoxy group, propoxy Group or butoxy group is preferred.

The compound represented by the general formula (N-1-11) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-11) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compounds represented by the general formula (N-1-11) are represented by the formulas (N-1-11.1) to (N-1-11.5) and (N-1-11.11). ) To a compound selected from the group of compounds represented by formula (N-1-11.14), preferably represented by formula (N-1-11.2) and formula (N-1-11.4) Are preferred.

The compounds represented by the formula (N-1-11.2) and the formula (N-1-11.4) can be used alone or in combination. The lower limit of the preferable content of these compounds alone or with respect to the total amount is 5%, 10%, 13%, 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The composition of the present invention preferably contains three or more compounds selected from the group consisting of compounds represented by the general formulas (N-1-1), (N-1-2) and (ii).

The composition of the present invention preferably contains one or more compounds selected from the group consisting of compounds represented by formulas (N-1), (N-2) and (N-3). . These compounds correspond to dielectrically negative compounds (the sign of Δε is negative and the absolute value is greater than 2).

(Wherein, R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31 and R ^N32 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent 2 in the alkyl group) _Two or more —CH ₂ — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31, and A ^N32 are each independently (a) a 1,4-cyclohexylene group (one —CH ₂ — or adjacent to each other in this group). Two or more —CH ₂ — that are not present may be replaced by —O—.)
(B) 1,4-phenylene group (one —CH═ present in this group or two or more —CH═ that are not adjacent to each other may be replaced by —N═)
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be replaced by —N═. ) And (d) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the hydrogen atoms in the groups (a), (b), (c) and (d) are respectively It may be independently substituted with a cyano group, a halogen atom or an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent two or more —CH ₂ — in the alkyl group are each independently — CH═CH—, —C≡C—, —O—, —CO—, —C Optionally substituted by OO— or —OCO—,
Z ^N11 , Z ^N12 , Z ^N21 , Z ^N22 , Z ^N31 and Z ^N32 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—. , —COO—, —OCO—, —OCF ₂ —, —CF ₂ O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—,
^XN21 represents a hydrogen atom or a fluorine atom,
T ^N31 represents —CH ₂ — or an oxygen atom,
n ^N11 , n ^N12 , n ^N21 , n ^N22 , n ^N31, and n ^N32 each independently represent an integer of 0 to 3, but n ^N11 + n ^N12 , n ^N21 + n ^N22, and n ^N31 + n ^N32 are each independently When there are a plurality of A ^N11 to A ^N32 and Z ^N11 to Z ^N32 , they may be the same or different, but the general formula (N-1-1), The compounds represented by (N-1-2) and (ii) are excluded. )

The compounds represented by the general formulas (N-1), (N-2) and (N-3) are preferably compounds having a negative Δε and an absolute value larger than 3.

In the general formulas (N-1), (N-2) and (N-3), R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31 and R ^N32 each independently represent 1 to 8 carbon atoms. An alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms, preferably an alkyl group having 1 to 5 carbon atoms, An alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms is preferable, and an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is preferable. More preferably, an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms is more preferable, and an alkenyl group having 3 carbon atoms (propenyl group) is particularly preferable.

Further, when the ring structure to which it is bonded is a phenyl group (aromatic), a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms and carbon An alkenyl group having 4 to 5 atoms is preferable, and when the ring structure to which the alkenyl group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms, a straight chain A straight-chain alkoxy group having 1 to 4 carbon atoms and a straight-chain alkenyl group having 2 to 5 carbon atoms are preferred. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

The alkenyl group is preferably selected from groups represented by any one of the formulas (R1) to (R5) (a black dot in each formula represents a carbon atom in the ring structure).

A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31, and A ^N32 are preferably aromatic when it is required to increase Δn independently, and in order to improve the response speed, fat Preferably a trans-1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5 -Difluoro-1,4-phenylene group, 2,3-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1 , 4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group Preferred, it is more preferable that represents the following structures,

More preferably, it represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group.
^{^{^{^{Z N11, Z N12, Z N21}}}} , Z N22, Z N31 and ^{Z N32} _-CH 2 each _{independently} _{O -, - CF 2 O -} , - CH 2 CH 2 -, - CF 2 CF 2 - or a single bond preferably represents _{_{an, -CH 2 O -, - CH}} 2 CH 2 - or a single bond is more preferable, _-CH 2 O-or a single bond is particularly preferred.

^XN21 is preferably a fluorine atom.
T ^N31 is preferably an oxygen atom.

n ^N11 + n ^N12 , n ^N21 + n ^N22 and n ^N31 + n ^N32 are preferably 1 or 2, a combination in which n ^N11 is 1 and n ^N12 is 0, a combination in which n ^N11 is 2 and n ^N12 is 0, n ^A combination in which ^N11 is 1 and n ^N12 is 1, a combination in which n ^N11 is 2 and n ^N12 is 1, a combination in which n ^N21 is 1 and n ^N22 is 0, n ^N21 is 2 and n ^N22 is n A combination in which n ^N31 is 1 and n ^N32 is 0, and a combination in which n ^N31 is 2 and n ^N32 is 0 are preferable.

The lower limit of the preferable content of the compound represented by the general formula (N-1) with respect to the total amount of the composition of the present invention is 1%, 3%, 10%, 20% Yes, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20% 15% and 10%.

The lower limit of the preferable content of the compound represented by the general formula (N-2) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, 30% Yes, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20% It is.

The lower limit of the preferable content of the compound represented by the general formula (N-3) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, 30% Yes, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20% It is.

When the viscosity of the composition of the present invention is kept low and a composition having a high response speed is required, the above lower limit value is preferably low and the upper limit value is preferably low. Furthermore, when the composition of the present invention keeps Tni high and a composition having good temperature stability is required, the above lower limit value is preferably low and the upper limit value is preferably low. When it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above lower limit value is increased and the upper limit value is high.

Examples of the compound represented by the general formula (N-1) include compounds represented by the following general formulas (N-1a) to (N-1g).

^{(Wherein, R N11} and ^{R N12} are as defined ^{R N11} and ^{R N12} in the general formula ^{(N-1), n Na12} represents 0 or ^{1, n NB11} represents 0 or ^{1, n NC11} is ^Represents 0 or 1, n ^Nd11 represents 0, n ^Ne11 represents 1 or 2, n ^Nf12 represents 1 or 2, n ^Ng11 represents 1 or 2, A ^Ne11 represents trans-1,4-cyclo ^{Represents a} hexylene group or a 1,4-phenylene group, and A ^Ng11 represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group, at least one of which is 1 , 4-cyclohexenylene group, Z ^Ne ¹¹ represents a single bond or an ethylene group, but at least one represents an ethylene group,
One or more hydrogen atoms in the cyclohexane ring in the above general formulas (N-1a) to (N-1g) are each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. In addition, one or two or more non-adjacent —CH ₂ — in the alkyl group may be independently —CH═CH—, —C≡C—, —O—, —CO—, —COO. Optionally substituted by-or -OCO-,
One hydrogen atom in the benzene ring in the general formulas (N-1a) to (N-1g) may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, One or two or more non-adjacent —CH ₂ — in the alkyl group are each independently —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO. It may be substituted by-except for the compound represented by formula (N-1-1). )

More specifically, the compounds represented by the general formula (N-1) are represented by the general formulas (N-1-3) to (N-1-5), (N-1-12) to (N-1- 18) and a compound selected from the group of compounds represented by (N-1-20) to (N-1-22).

The compound represented by the general formula (N-1-3) is the following compound.

( ^Wherein R ^N131 and R ^N132 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently Optionally substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
One or more hydrogen atoms in the cyclohexane ring in the general formula (N-1-3) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, One or two or more non-adjacent —CH ₂ — in the alkyl group are each independently —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO. Optionally substituted by-
In the general formula (N-1-3), one hydrogen atom in the benzene ring may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. Or two or more non-adjacent —CH ₂ — are each independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. It may be. )

R ^N131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N132 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 3 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and preferably a 1-propenyl group, an ethoxy group, a propoxy group or a butoxy group. .

The compound represented by the general formula (N-1-3) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

When emphasizing the improvement of Δε, it is preferable to set a large amount of content. When emphasizing solubility at low temperatures, setting a large amount of content is highly effective. When emphasizing Tni, the content is set to be high. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-3) with respect to the total amount of the composition of the present invention is 1%, 3%, 5%, 10% 13%, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, and 10%.

Further, the compounds represented by the general formula (N-1-3) are represented by the formulas (N-1-3.1) to (N-1-3.7) and (N-1-3.10). A compound selected from the group of compounds represented by formula (N-1-3.11) and formula (N-1-3.20) to formula (N-1-3.22): It is a compound represented by formulas (N-1-3.1) to (N-1-3.7) and formulas (N-1-3.21) to (N-1-3.22). Preferably, formula (N-1-3.1), formula (N-1-3.2), formula (N-1-3.3), formula (N-1-3.4), formula (N- The compounds represented by 1-3.6) and (N-1-3.22) are preferred.

Formula (N-1-3.1) to Formula (N-1-3.4), Formula (N-1-3.6), Formula (N-1-3.21), and Formula (N-1- The compounds represented by 3.22) can be used alone or in combination, but the compounds of formula (N-1-3.1) and formula (N-1-3.2) A combination, or two or three combinations selected from formula (N-1-3.3), formula (N-1-3.4) and formula (N-1-3.6) is preferred. The lower limit of the preferred content of these compounds alone or with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15%, 17%, 20% %. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-4) is the following compound.

^{(Wherein, R N141} and ^{R N142} each independently represents an alkyl group having 1 to 8 carbon atoms, said alkyl 1 in groups or non-adjacent two or more -CH ₂ - are each independently And may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.

R ^N141 and ^{R N142} are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms carbon atoms 4-5 preferably a methyl group, a propyl group, an ethoxy Group or butoxy group is preferred.

The compound represented by the general formula (N-1-4) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

When emphasizing the improvement of Δε, it is preferable to set a large content. When emphasizing solubility at low temperatures, it is more effective to set a small content. When emphasizing Tni, the content is set to be small. Setting it to a small value is highly effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-4) with respect to the total amount of the composition of the present invention is 3%, 5%, 7%, 10% 13%, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 11%, 10%, and 8%.

Further, the compounds represented by the general formula (N-1-4) are represented by the formulas (N-1-4.1) to (N-1-4.4) and the formula (N-1-4.11). ) To a compound selected from the group of compounds represented by formula (N-1-4.14), preferably represented by formulas (N-1-4.1) to (N-1-4.4) The compounds represented by formula (N-1-4.1), formula (N-1-4.2) and formula (N-1-4.4) are preferred.

The compounds represented by formula (N-1-4.1) to formula (N-1-4.4) and formula (N-1-4.11) to formula (N-1-4.14) are Although it can be used alone or in combination, the lower limit of the preferred content of these compounds alone or with respect to the total amount of the composition of the present invention is 3%, 5% Yes, 7%, 10%, 13%, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 11%, 10%, and 8%.

The compound represented by the general formula (N-1-5) is the following compound.

( ^Wherein , R ^N151 and R ^N152 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

R ^N151 and R ^N152 are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group. Is preferred.

The compound represented by the general formula (N-1-5) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

When emphasizing the improvement of Δε, it is preferable to set a large content. When emphasizing solubility at low temperatures, it is more effective to set a small content. When emphasizing Tni, the content is set to be small. The effect is high when setting a large number. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-5) with respect to the total amount of the composition of the present invention is 5%, 8%, 10%, 13% 15%, 17%, 20%. The upper limit of the preferable content is 35%, 33%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the composition of the present invention. %, 18%, 15% and 13%.

Further, the compound represented by the general formula (N-1-5) is a compound selected from the group of compounds represented by the formula (N-1-5.1) to the formula (N-1-5.6). It is preferable that the compound represented by formula (N-1-5.1), formula (N-1-5.2) and formula (N-1-5.4) is preferable.

The compounds represented by formula (N-1-5.1), formula (N-1-5.2) and formula (N-1-5.4) may be used alone or in combination. However, the lower limit of the preferred content of these compounds alone or with respect to the total amount of the composition of the present invention is 5%, 8%, 10%, 13%, 15%, 17% and 20%. The upper limit of the preferable content is 35%, 33%, 30%, 28%, 25%, 23%, and 20% with respect to the total amount of the composition of the present invention. %, 18%, 15% and 13%.

The compound represented by the general formula (N-1-12) is the following compound.

( ^Wherein R ^N1121 and R ^N1122 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent two or more —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

^RN1121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. ^RN1122 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-12) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-12) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-13) is the following compound.

( ^Wherein R ^N1131 and R ^N1132 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

R ^N1131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N1132 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-13) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-13) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-14) is the following compound.

( ^Wherein R ^N1141 and R ^N1142 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent two or more —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

R ^N1141 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N1142 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-14) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-14) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-15) is the following compound.

( ^Wherein R ^N1151 and R ^N1152 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

^RN1151 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N1152 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-15) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-15) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-16) is the following compound.

( ^Wherein , R ^N1161 and R ^N1162 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

R ^N1161 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N1162 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-16) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-16) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-17) is the following compound.

( ^Wherein , R ^N1171 and R ^N1172 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

^RN1171 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group. R ^N1172 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-17) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-17) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-18) is the following compound.

( ^Wherein , R ^N1181 and R ^N1182 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent two or more —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

^RN1181 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group. R ^N1182 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-18) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-18) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

Further, the compound represented by the general formula (N-1-18) is a compound selected from the group of compounds represented by the formula (N-18.1) to the formula (N-1-18.5). Preferably, it is a compound represented by the formulas (N-18.1.1) to (N-1-18.3), and the formulas (N-18.2.) And (N The compound represented by −1-18.3) is preferable.

The compound represented by the general formula (N-1-20) is the following compound.

( ^Wherein , R ^N1201 and R ^N1202 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

R ^N1201 and R ^N1202 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-20) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-20) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-21) is the following compound.

( ^Wherein , R ^N1211 and R ^N1212 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

R ^N1211 and R ^N1212 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-21) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-21) with respect to the total amount of the composition of the present invention is 5%, 10%, 13%, 15% 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, and 13%.

The compound represented by the general formula (N-1-22) is the following compound.

( ^Wherein , R ^N1221 and R ^N1222 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

R ^N1221 and R ^N1222 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, or a butyl group.

The compound represented by the general formula (N-1-22) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-1-22) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 13% 15%, 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 10%, 5%.

Furthermore, the compounds represented by the general formula (N-1-22) are represented by the formula (N-1-22.1) to the formula (N-1-22.6), the formula (N-1-22.11). And a compound selected from the group of compounds represented by formula (N-1-22.12), preferably represented by formulas (N-1-22.1) to (N-1-22.5) The compounds represented by the formulas (N-1-22.1) to (N-1-22.4) are preferable.

The compound represented by the general formula (N-3) is preferably a compound selected from the group of compounds represented by the general formula (N-3-2).

( ^Wherein , R ^N321 and R ^N322 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently (It may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—.)

R ^N321 and R ^N322 are preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a propyl group or a pentyl group.

The compound represented by the general formula (N-3-2) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (N-3-2) with respect to the total amount of the composition of the present invention is 3%, 5%, 10%, 13% , 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, and 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6% % And 5%.

Further, the compound represented by the general formula (N-3-2) is a compound selected from the group of compounds represented by the formula (N-3-2.1) to the formula (N-3-2.3). Preferably there is.

The liquid crystal composition of the present invention preferably contains one or more compounds represented by the general formula (L). The compound represented by the general formula (L) corresponds to a dielectrically neutral compound (Δε value is −2 to 2).

(Wherein R ^L1 and R ^L2 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently Optionally substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
n ^L1 represents 0, 1, 2 or 3,
A ^L1 , A ^L2 and A ^L3 each independently represent (a) a 1,4-cyclohexylene group (one —CH ₂ — present in the group or two or more —CH ₂ — not adjacent to each other). May be replaced by -O-.)
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be replaced by —N═) and (c) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or 1,2 , 3,4-tetrahydronaphthalene-2,6-diyl, one —CH═ or two or more non-adjacent —CH═ may be replaced by —N═.
And a hydrogen atom in the group (a), the group (b) and the group (c) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom. ,
Z ^L1 and Z ^L2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —OCF ₂ -, -CF ₂ O-, -CH = NN-CH-, -CH = CH-, -CF = CF- or -C≡C-
When n ^L1 is 2 or 3, and a plurality of A ^L2s are present, they may be the same or different, and when n ^L1 is 2 or 3, and a plurality of Z ^L2s are present, they are May be the same or different, but the general formulas (i), (ii), (N-1), (N-2), (N-1-1), (N-1-2) And the compound represented by (N-3). )

The compounds represented by the general formula (L) may be used alone or in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types, three types, four types, five types, six types, seven types, eight types, nine types, 10 types, More than types.

In the composition of the present invention, the content of the compound represented by the general formula (L) is low-temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, It is necessary to appropriately adjust according to required performance such as dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L) with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, 30%, 40 %, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferable content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, and 25%.

When the viscosity of the composition of the present invention is kept low and a composition having a high response speed is required, the above lower limit value is preferably high and the upper limit value is preferably high. Furthermore, when the composition of the present invention maintains a high Tni and requires a composition having good temperature stability, the above lower limit value is preferably high and the upper limit value is preferably high. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above lower limit value is lowered and the upper limit value is low.

When importance is attached to reliability, R ^L1 and R ^L2 are preferably both alkyl groups, and when importance is placed on reducing the volatility of the compound, it is preferably an alkoxy group, and importance is placed on viscosity reduction. In this case, at least one is preferably an alkenyl group.

The number of halogen atoms present in the molecule is preferably 0, 1, 2 or 3, preferably 0 or 1, and 1 is preferred when importance is attached to compatibility with other liquid crystal molecules.
R ^L1 and R ^L2 are each a linear alkyl group having 1 to 5 carbon atoms or a linear alkyl group having 1 to 4 carbon atoms when the ring structure to which R ^L1 is bonded is a phenyl group (aromatic). When the ring structure to which it is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a straight-chain C 1-5 carbon atom is preferred. Alkyl groups, linear alkoxy groups having 1 to 4 carbon atoms and linear alkenyl groups having 2 to 5 carbon atoms are preferred. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

The alkenyl group is preferably selected from groups represented by any of the formulas (R1) to (R5). (The black dots in each formula represent carbon atoms in the ring structure.)

n ^L1 is preferably 0 when importance is attached to the response speed, 2 or 3 is preferred for improving the upper limit temperature of the nematic phase, and 1 is preferred for balancing these. In order to satisfy the properties required for the composition, it is preferable to combine compounds having different values.

A ^L1 , A ^L2, and A ^L3 are preferably aromatic when it is required to increase Δn, and are preferably aliphatic for improving the response speed, and are each independently trans- 1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6 -It preferably represents a diyl group or a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and more preferably represents the following structure:

More preferably, it represents a trans-1,4-cyclohexylene group or a 1,4-phenylene group.

Z ^L1 and Z ^L2 are preferably single bonds when the response speed is important.

The compound represented by the general formula (L) preferably has 0 or 1 halogen atom in the molecule.

The compound represented by the general formula (L) is preferably a compound selected from the group of compounds represented by the general formulas (L-1) to (L-7).

The compound represented by the general formula (L-1) is the following compound.

(In the formula, R ^L11 and R ^L12 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L), except for the compound represented by General Formula (i)).

R ^L11 and R ^L12 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. .

The compound represented by the general formula (L-1) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content is 1%, 2%, 3%, 5%, 7%, 10%, and 15% with respect to the total amount of the composition of the present invention. %, 20%, 25%, 30%, 35%, 40%, 45%, 50%, and 55%. The upper limit of the preferable content is 95%, 90%, 85%, 80%, 75%, 70%, 65%, based on the total amount of the composition of the present invention. %, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%, and 20%.

When the viscosity of the composition of the present invention is kept low and a composition having a high response speed is required, the above lower limit value is preferably high and the upper limit value is preferably high. Furthermore, when the composition of the present invention requires a high Tni and a composition having good temperature stability, it is preferable that the lower limit value is moderate and the upper limit value is moderate. When it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the lower limit value is low and the upper limit value is low.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-1).

(In the formula, R ^L12 represents the same meaning as in general formula (L-1), but excludes the compound represented by general formula (i).)

The compound represented by the general formula (L-1-1) is a compound selected from the group of compounds represented by the formula (L-1-1.1) to the formula (L-1-1.3). And is preferably a compound represented by formula (L-1-1.2) or formula (L-1-1.3), and particularly represented by formula (L-1-1.3). It is preferable that it is a compound.

The lower limit of the preferable content of the compound represented by the formula (L-1-1.3) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, and 10%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, and 6% with respect to the total amount of the composition of the present invention. %, 5%, 3%.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-2).

The lower limit of the preferable content of the compound represented by the formula (L-1-2) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 15% 17%, 20%, 23%, 25%, 27%, 30%, 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 33%, and 30%.

Further, the compound represented by the general formula (L-1-2) is a compound selected from the group of compounds represented by the formula (L-1-2.1) to the formula (L-1-2.4). Preferably, it is a compound represented by the formula (L-1-2.2) to the formula (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is preferable because the response speed of the composition of the present invention is particularly improved. When obtaining Tni higher than the response speed, it is preferable to use a compound represented by the formula (L-1-2.3) or the formula (L-1-2.4). The content of the compounds represented by formula (L-1-2.3) and formula (L-1-2.4) is not preferably 30% or more in order to improve the solubility at low temperatures.

The lower limit of the preferable content of the compound represented by the formula (L-1-2.2) with respect to the total amount of the composition of the present invention is 10%, 15%, 18%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, 38%, and 40%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 43%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 32%, 30%, 27%, 25%, and 22%.

The lower limit of the preferable total content of the compound represented by the formula (L-1-2.3) and the compound represented by the formula (L-1-2.2) with respect to the total amount of the composition of the present invention The values are 10%, 15%, 20%, 25%, 27%, 30%, 35% and 40%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 43%, 40%, and 38% with respect to the total amount of the composition of the present invention. %, 35%, 32%, 30%, 27%, 25%, and 22%.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-3).

(In the formula, R ^L13 and R ^L14 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L), except for the compound represented by General Formula (i)).

R ^L13 and R ^L14 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. .

The lower limit of the preferable content of the compound represented by the formula (L-1-3) with respect to the total amount of the composition of the present invention is 1%, 5%, 7%, 10% 13%, 15%, 17%, 20%, 23%, 25%, 30%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 40%, 37%, and 35% with respect to the total amount of the composition of the present invention. %, 33%, 30%, 27%, 25%, 23%, 23%, 20%, 17%, 15%, 13%, 10% %.

Further, the compounds represented by the general formula (L-1-3) are represented by the formulas (L-1-3.1) to (L-1-3.4) and (L-1-3.11). ) To a compound selected from the group of compounds represented by formula (L-1-3.13), and preferably represented by formula (L-1-3.1), formula (L-1-3.3) or A compound represented by the formula (L-1-3.4) is preferable. In particular, the compound represented by the formula (L-1-3.1) is preferable because the response speed of the composition of the present invention is particularly improved. Further, when obtaining Tni higher than the response speed, the equation (L-1-3.3), the equation (L-1-3.4), the equation (L-1-3.11), and the equation (L− It is preferable to use a compound represented by 1-3.12). Sum of compounds represented by formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12) The content of is not preferably 20% or more in order to improve the solubility at low temperatures.

The lower limit of the preferred content of the compounds represented by formulas (L-1-3.1) to (L-1-3.4) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferable content is 25%, 20%, 17%, 15%, 13%, 10%, and 8% with respect to the total amount of the composition of the present invention. %, 7%, and 6%.

The lower limit of the preferable content of the compounds represented by formulas (L-1-3.11) to (L-1-3.13) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferable content is 20%, 17%, 15%, 13%, 10%, 8%, and 7% with respect to the total amount of the composition of the present invention. % And 6%.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-4) and / or (L-1-5).

(In the formula, R ^L15 and R ^L16 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L), except for the compound represented by General Formula (i)).

R ^L15 and R ^L16 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. .

The lower limit of the preferable content of the compound represented by the formula (L-1-4) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 13% 15%, 17%, 20%. The upper limit of the preferable content is 25%, 23%, 20%, 17%, 15%, 13%, and 10% with respect to the total amount of the composition of the present invention. %.

The lower limit of the preferable content of the compound represented by the formula (L-1-5) with respect to the total amount of the composition of the present invention is 1%, 5%, 10%, 13% 15%, 17%, 20%. The upper limit of the preferable content is 25%, 23%, 20%, 17%, 15%, 13%, and 10% with respect to the total amount of the composition of the present invention. %.

Further, the compounds represented by the general formulas (L-1-4) and (L-1-5) are represented by the formulas (L-1-4.1) to (L-1-4.3), and A compound selected from the group of compounds represented by formula (L-1-5.1) to formula (L-1-5.3) is preferred, and is represented by formula (L-1-4.2) or formula (L The compound represented by -1-5.2) is preferable.

The lower limit of the preferable content of the compound represented by the formula (L-1-4.2) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18%, 20%. The upper limit of the preferable content is 20%, 17%, 15%, 13%, 10%, 8%, and 7% with respect to the total amount of the composition of the present invention. % And 6%.

Formula (L-1-1.3), Formula (L-1-2.2), Formula (L-1-3.1), Formula (L-1-3.3), Formula (L-1- 3.4), two or more compounds selected from the group consisting of compounds represented by formula (L-1-3.11) and formula (L-1-3.12) are preferably combined. L-1-1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3. It is preferable to combine two or more compounds selected from the group consisting of compounds represented by 4) and formula (L-1-4.2), and the lower limit of the preferred content of the total content of these compounds is 1%, 2%, 3%, 5%, 7%, 10%, 13%, and 15% with respect to the total amount of the composition of the present invention Yes, 18%, 20% Yes, 23%, 25%, 27%, 30%, 33%, 35%, and the upper limit is 80% with respect to the total amount of the composition of the present invention. Yes, 70%, 60%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 28% Yes, 25%, 23%, 20%. When emphasizing the reliability of the composition, compounds represented by formula (L-1-3.1), formula (L-1-3.3) and formula (L-1-3.4)) It is preferable to combine two or more compounds selected from the group consisting of the compounds represented by formulas (L-1-1.3) and (L-1-2.2) when importance is attached to the response speed of the composition. It is preferable to combine two or more compounds selected from the group consisting of compounds represented by:

The compound represented by the general formula (L-2) is the following compound.

(In the formula, R ^L21 and R ^L22 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L).)

R ^L21 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L22 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom. An alkoxy group of 1 to 4 is preferable.

The compound represented by the general formula (L-2) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

When emphasizing solubility at low temperatures, it is highly effective to set a large amount of content. Conversely, when emphasizing response speed, setting a small amount of content is highly effective. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (L-2) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10% and 13%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, and 6% with respect to the total amount of the composition of the present invention. %, 5%, 3%.

Further, the compound represented by the general formula (L-2) is preferably a compound selected from the group of compounds represented by the formulas (L-2.1) to (L-2.6). A compound represented by formula (L-2.1), formula (L-2.3), formula (L-2.4) and formula (L-2.6) is preferred.

The compound represented by the general formula (L-3) is the following compound.

(In the formula, R ^L31 and R ^L32 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L).)

R ^L31 and R ^L32 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

The compound represented by the general formula (L-3) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (L-3) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7% and 10%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, and 6% with respect to the total amount of the composition of the present invention. %, 5%, 3%.

When a high birefringence is obtained, the effect is high when the content is set to be large. On the other hand, when high Tni is emphasized, the effect is high when the content is set low. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

Further, the compounds represented by the general formula (L-3) are represented by the formulas (L-3.1) to (L-3.4) and (L-3.6) to (L-3. 7) is preferably a compound selected from the group of compounds represented by formula (L-3.1) to formula (L-3.4) and formula (L-3.6). Preferably there is.

The compound represented by the general formula (L-4) is the following compound.

(In the formula, R ^L41 and R ^L42 each independently represent the same meaning as R ^L1 and R ^L2 in General Formula (L).)

R ^L41 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L42 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom. An alkoxy group of 1 to 4 is preferable. )

The compound represented by the general formula (L-4) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

In the composition of the present invention, the content of the compound represented by the general formula (L-4) is low-temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L-4) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40% . The upper limit of the preferable content of the compound represented by the formula (L-4) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. 20%, 15%, 10%, 5%.

The compound represented by general formula (L-4) is preferably a compound represented by formula (L-4.1) to formula (L-4.3), for example.

Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence, even if the compound represented by the formula (L-4.1) is contained, the formula (L -4.2) Even if it contains a compound represented by formula (L-4.1), it contains both a compound represented by formula (L-4.1) and a compound represented by formula (L-4.2). Or all of the compounds represented by formulas (L-4.1) to (L-4.3) may be included. The lower limit of the preferable content of the compound represented by formula (L-4.1) or formula (L-4.2) with respect to the total amount of the composition of the present invention is 3%, Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%, and the preferred upper limit is 45, 40% , 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% .

When both the compound represented by formula (L-4.1) and the compound represented by formula (L-4.2) are contained, the amount of both compounds relative to the total amount of the composition of the present invention is The lower limit of the preferred content is 15%, 19%, 24%, and 30%, and the preferred upper limit is 45, 40%, 35%, and 30%. Yes, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by the general formula (L-4) is preferably, for example, a compound represented by the formula (L-4.4) to the formula (L-4.6). It is preferable that it is a compound represented by this.

Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like, even if the compound represented by the formula (L-4.4) is contained, the formula (L -4.5) contains both the compound represented by formula (L-4.4) and the compound represented by formula (L-4.5). May be.

The lower limit of the preferable content of the compound represented by the formula (L-4.4) or the formula (L-4.5) with respect to the total amount of the composition of the present invention is 3%, Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%. Preferred upper limit values are 45, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13% %, 10%, and 8%.

When both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5) are contained, the amount of both compounds relative to the total amount of the composition of the present invention is The lower limit of the preferable content is 1%, 3%, 5%, 7%, 9%, 11%, 15%, and the preferable upper limit is 45%. Yes, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by the general formula (L-4) is preferably a compound represented by the formula (L-4.7) to the formula (L-4.11), and particularly the formula (L-4. Compounds represented by 8) and formula (L-4.11) are preferred.

When the compound represented by the formula (L-4.8) or the compound represented by the formula (L-4.11) is contained, the formula (L-4. The lower limit of the preferable content of the compound represented by 11) is 1%, 3%, 5%, 7%, 9%, 11%, 12% 13%, 18%, 21%, and a preferred upper limit is 45, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%.

The compound represented by the general formula (L-5) is the following compound.

(In the formula, R ^L51 and R ^L52 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L).)

R ^L51 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L52 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom. An alkoxy group of 1 to 4 is preferable.

The compound represented by the general formula (L-5) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

In the composition of the present invention, the content of the compound represented by the general formula (L-5) includes solubility at low temperature, transition temperature, electrical reliability, birefringence index, process suitability, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40% . The upper limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. 20%, 15%, 10%, 5%.

The compound represented by the general formula (L-5) is preferably a compound represented by the formula (L-5.1) or (L-5.2), and in particular, the compound represented by the formula (L-5. It is preferable that it is a compound represented by 1).

The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, and 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.

The compound represented by the general formula (L-5) is preferably a compound represented by the formula (L-5.3) or the formula (L-5.4).
The lower limit of the preferable content of these compounds with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5%, and 7%. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.

The compound represented by the general formula (L-5) is preferably a compound selected from the group of compounds represented by the formulas (L-5.5) to (L-5.7). The compound represented by L-5.7) is preferred.

The compound represented by the general formula (L-6) is the following compound.

(In the formula, R ^L61 and R ^L62 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L), and X ^L61 and X ^L62 each independently represent a hydrogen atom or a fluorine atom) And the compound represented by formula (N-1) is excluded.)

R ^L61 and R ^L62 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and one of X ^L61 and X ^L62 is a fluorine atom and the other is a hydrogen atom. It is preferable.

The compound represented by the general formula (L-6) can be used alone, or two or more compounds can be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.

The lower limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40% . The upper limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. 20%, 15%, 10%, 5%. When emphasizing to increase Δn, it is preferable to increase the content, and when emphasizing the precipitation at low temperature, it is preferable to decrease the content.

The compound represented by the general formula (L-6) is preferably a compound represented by the formula (L-6.1) to the formula (L-6.9).

There are no particular restrictions on the types of compounds that can be combined, but 1 to 3 types of these compounds are preferably contained, more preferably 1 to 4 types. Further, since the wide molecular weight distribution of the selected compound is also effective for the solubility, for example, one type of the compound represented by the formula (L-6.1) or (L-6.2), the formula (L- 6.4) or one type from the compound represented by (L-6.5), one type from the compound represented by formula (L-6.6) or formula (L-6.7), It is preferable to select one compound from the compounds represented by -6.8) or (L-6.9) and combine them as appropriate. Among these, it is preferable to include a compound represented by formula (L-6.1), formula (L-6.2), formula (L-6.4), or formula (L-6.5).

Further, the compound represented by the general formula (L-6) is preferably, for example, a compound represented by the formula (L-6.10) to the formula (L-6.17). A compound represented by L-6.11) is preferable.

The compound represented by the general formula (L-7) is the following compound.

^{(Wherein, R L71} and ^{R L72} each independently represent the same meaning as ^{R L1} and ^{R L2} in Formula ^{(L), A L71} and ^{A L72} is ^{A L2} and in the general formula (L) independently A ^L3 represents the same meaning, but the hydrogen atoms on A ^L71 and A ^L72 may be each independently substituted with a fluorine atom, Z ^L71 represents the same meaning as Z ^L2 in formula (L), X ^L71 and X ^L72 each independently represent a fluorine atom or a hydrogen atom, except for the compound represented by formula (N-1).

In the formula, R ^L71 and R ^L72 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and A ^L71 and A ^L72 Are each independently preferably a 1,4-cyclohexylene group or a 1,4-phenylene group, the hydrogen atoms on A ^L71 and A ^L72 may be each independently substituted with a fluorine atom, and Z ^L71 is a single group. A bond or COO- is preferable, a single bond is preferable, and X ^L71 and X ^L72 are preferably a hydrogen atom.

There are no particular restrictions on the types of compounds that can be combined, but they are combined according to the required performance, such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, and four kinds.

In the composition of the present invention, the content of the compound represented by the general formula (L-7) includes solubility at low temperature, transition temperature, electrical reliability, birefringence index, process suitability, dripping marks, It is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.
The lower limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% 7%, 10%, 14%, 16%, 20%. The upper limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the composition of the present invention is 30%, 25%, 23%, and 20%. 18%, 15%, 10%, 5%.

When an embodiment with high Tni is desired for the composition of the present invention, the content of the compound represented by formula (L-7) is preferably increased, and when an embodiment with low viscosity is desired, the content is It is preferable to reduce the amount.

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.1) to the formula (L-7.4), and the formula (L-7. It is preferable that it is a compound represented by 2).

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.11) to the formula (L-7.13). It is preferable that it is a compound represented by 11).

Furthermore, the compound represented by the general formula (L-7) is a compound represented by the formula (L-7.21) to the formula (L-7.23). A compound represented by formula (L-7.21) is preferable.

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.31) to the formula (L-7.34), and the formula (L-7. 31) or / and a compound represented by the formula (L-7.32).

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.41) to the formula (L-7.44), and the formula (L-7. 41) or / and a compound represented by formula (L-7.42).

Furthermore, the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.51) to the formula (L-7.53).

General formulas (i), (N-1-1), (N-1-2), (ii), (L) and (N-1) to (N-) with respect to the total amount of the composition of the present invention The lower limit of the preferable total content of the compound represented by 3) is 80%, 85%, 88%, 90%, 92%, 93%, 94% 95%, 96%, 97%, 98%, 99%, 100%. The upper limit of the preferable content is 100%, 99%, 98%, and 95%.

General formulas (i), (N-1-1), (N-1-2), (ii), (L-1) to (L-7) with respect to the total amount of the composition of the present invention, and The lower limit of the preferable total content of the compounds represented by (N-1) to (N-3) is 80%, 85%, 88%, 90%, 92% Yes, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The upper limit of the preferable content is 100%, 99%, 98%, and 95%.

The composition of the present invention preferably does not contain a compound having a structure in which oxygen atoms such as a peracid (—CO—OO—) structure are bonded in the molecule.

When emphasizing the reliability and long-term stability of the composition, the content of the compound having a carbonyl group is preferably 5% or less, more preferably 3% or less with respect to the total mass of the composition. Preferably, it is more preferably 1% or less, and most preferably not substantially contained.

When importance is attached to the stability by UV irradiation, the content of the compound substituted with chlorine atoms is preferably 15% or less, preferably 10% or less, based on the total mass of the composition. % Or less, preferably 5% or less, more preferably 3% or less, and still more preferably substantially not contained.

It is preferable to increase the content of a compound in which all the ring structures in the molecule are 6-membered rings, and the content of the compound in which all the ring structures in the molecule are 6-membered rings is 80 % Or more, more preferably 90% or more, still more preferably 95% or more, and the composition is composed only of a compound in which all of the ring structures in the molecule are all 6-membered rings. Most preferably.

In order to suppress deterioration due to oxidation of the composition, it is preferable to reduce the content of the compound having a cyclohexenylene group as a ring structure, and the content of the compound having a cyclohexenylene group as the total mass of the composition. On the other hand, it is preferably 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, and still more preferably not contained.

When importance is attached to improvement of viscosity and improvement of Tni, the content of a compound having a 2-methylbenzene-1,4-diyl group in the molecule, in which a hydrogen atom may be substituted with a halogen, may be reduced. Preferably, the content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule is preferably 10% or less, more preferably 8% or less, based on the total mass of the composition. It is more preferably 5% or less, further preferably 3% or less, and still more preferably substantially not contained.

When importance is attached to viscosity and dielectric anisotropy, the content of the liquid crystal compound in which the hydrogen atom in the side chain alkyl group, alkenyl group, alkoxy group or alkenyloxy group is substituted with fluorine may be reduced. Preferably, the content is preferably 10% or less, preferably 8% or less, preferably 5% or less, and preferably 3% or less with respect to the total mass of the composition. More preferably, it is not substantially contained.

When importance is attached to viscosity and refractive index anisotropy, it is preferable to reduce the content of the liquid crystal compound in which the linking group is —O—CH ₂ —CH ₂ —O—, and the content of the compound is preferably set to It is preferably 10% or less, preferably 8% or less, preferably 5% or less, preferably 3% or less, and substantially not contained with respect to the total mass of the product. Further preferred.

“Substantially not contained” in the present application means that it is not contained except for an unintentionally contained product.

When the compound contained in the liquid crystal composition of the present invention has an alkenyl group as a side chain, when the alkenyl group is bonded to a cyclohexane ring, the alkenyl group has 2 to 5 carbon atoms. Preferably, when the alkenyl group is bonded to a benzene ring, the alkenyl group preferably has 4 to 5 carbon atoms, and the unsaturated bond of the alkenyl group and the benzene ring are directly bonded to each other. Preferably not.

The preferable lower limit of Tni of the liquid crystal composition of the present invention is 50 ° C., 55 ° C., 60 ° C., 65 ° C., 70 ° C., 75 ° C., 80 ° C., 85 ° C. It is 90 degreeC. The preferable upper limit of Tni of the liquid crystal composition of the present invention is 130 ° C, 125 ° C, 120 ° C, 115 ° C, 110 ° C, 105 ° C, 100 ° C, 95 ° C. 90 ° C. 85 ° C. 80 ° C.

The preferable lower limit of Δn of the liquid crystal composition of the present invention is 0.080, 0.085, 0.090, 0.095, 0.100, 0.105, 0 .110. The preferable upper limit of Δn of the liquid crystal composition of the present invention is 0.130, 0.125, 0.120, 0.115, 0.110, 0.105, 0 .100.

The preferred lower limit of Δε of the liquid crystal composition of the present invention is −5.5, −5.0, −4.5, −4.0, −3.5, −3 0.0 and -2.5. The preferable upper limit of Δε of the liquid crystal composition of the present invention is −2.2, −2.5, −2.8, −3.1, and −3.4.

The preferable lower limit of γ ₁ of the liquid crystal composition of the present invention is 40 mPa · s, 45 mPa · s, 50 mPa · s, 55 mPa · s, 60 mPa · s, 65 mPa · s, 70 mPa · s. The preferable upper limit of γ ₁ of the liquid crystal composition of the present invention is 200 mPa · s, 150 mPa · s, 140 mPa · s, 130 mPa · s, 120 mPa · s, 110 mPa · s, 100 mPa · s, 95 mPa · s, and 90 mPa · s.

The average elastic constant (K _AVG ) of the liquid crystal composition of the present invention is preferably from 10 to 25, but the lower limit thereof is preferably 10, preferably 10.5, preferably 11, 11.5, preferably 12 Preferably, 12.3 is preferred, 12.5 is preferred, 12.8 is preferred, 13 is preferred, 13.3 is preferred, 13.5 is preferred, 13.8 is preferred, 14 is preferred, 14.3 is preferred 14.5 is preferable, 14.8 is preferable, 15 is preferable, 15.3 is preferable, 15.5 is preferable, 15.8 is preferable, 16 is preferable, 16.3 is preferable, and 16.5 is preferable 16.8 is preferred, 17 is preferred, 17.3 is preferred, 17.5 is preferred, 17.8 is preferred, 18 is preferred, and the upper limit is 25. 24.5 is preferred, 24 is preferred, 23.5 is preferred, 23 is preferred, 22.8 is preferred, 22.5 is preferred, 22.3 is preferred, 22 is preferred, 21.8 is preferred, 21.5 is preferred, 21.3 is preferred, 21 is preferred, 20.8 is preferred, 20.5 is preferred, 20.3 is preferred, 20 is preferred, 19.8 is preferred, 19.5 is preferred, 19.3 is preferred, 19 is preferred, 18.8 is preferred, 18.5 is preferred, 18.3 is preferred, 18 is preferred, 17.8 is preferred, 17.5 is preferred, 17.3 is preferred, 17 is preferred. When importance is placed on reducing power consumption, it is effective to reduce the amount of light from the backlight, and it is preferable to improve the light transmittance of the liquid crystal display element. For this purpose, the value of K _AVG should be set low. preferable. It is preferable to set a higher value of K _AVG in the case of emphasizing improved response speed.

The composition of the present invention may contain a polymerizable compound in order to produce a liquid crystal display device such as a PS mode, a PSA mode, a PSVA mode, a lateral electric field type PSA mode, or a lateral electric field type PSVA mode. Examples of the polymerizable compound that can be used include a photopolymerizable monomer that undergoes polymerization by energy rays such as light. The structure has, for example, a liquid crystal skeleton in which a plurality of six-membered rings such as biphenyl derivatives and terphenyl derivatives are connected. Examples thereof include a polymerizable compound. More specifically, the general formula (XX)

(Wherein, X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group,
Sp ²⁰¹ and Sp ²⁰² each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms, or —O— (CH ₂ ) _s — (wherein _s represents an integer of 2 to 7, Preferably bonded to an aromatic ring)
Z ²⁰¹ represents —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —CF ₂ O—, —OCF ₂ —, —CH ₂ CH ₂ —, —CF ₂ CF ₂ —, —CH═ CH—COO—, —CH═CH—OCO—, —COO—CH═CH—, —OCO—CH═CH—, —COO—CH ₂ CH ₂ —, —OCO—CH ₂ CH ₂ —, —CH ₂ CH ₂ —COO—, —CH ₂ CH ₂ —OCO—, —COO—CH ₂ —, —OCO—CH ₂ —, —CH ₂ —COO—, —CH ₂ —OCO—, —CY ¹ ═CY ² — (Wherein Y ¹ and Y ² each independently represents a fluorine atom or a hydrogen atom), —C≡C— or a single bond;
L ²⁰¹ and L ²⁰² are each independently a fluorine atom, an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 8 carbon atoms,
M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond, and all 1,4-phenylene groups in the formula have an arbitrary hydrogen atom substituted with a fluorine atom. Well,
n ²⁰¹ and n ²⁰² are each independently an integer of 0 to 4. ) Is preferred.

X ²⁰¹ and X ²⁰² are each preferably a diacrylate derivative that represents a hydrogen atom, or a dimethacrylate derivative that has a methyl group, and a compound in which one represents a hydrogen atom and the other represents a methyl group. As for the polymerization rate of these compounds, diacrylate derivatives are the fastest, dimethacrylate derivatives are slow, asymmetric compounds are in the middle, and a preferred embodiment can be used depending on the application. In the PSA display element, a dimethacrylate derivative is particularly preferable.

Sp ²⁰¹ and Sp ²⁰² each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms, or —O— (CH ₂ ) _s —, but at least one of them is a single bond in a PSA display element. A compound in which both represent a single bond or one in which one represents a single bond and the other represents an alkylene group having 1 to 8 carbon atoms or —O— (CH ₂ ) _s — is preferable. In this case, 1 to 4 alkyl groups are preferable, and s is preferably 1 to 4.

Z ²⁰¹ represents —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —CF ₂ O—, —OCF ₂ —, —CH ₂ CH ₂ —, —CF ₂ CF ₂ — or a single bond Are preferred, —COO—, —OCO— or a single bond is more preferred, and a single bond is particularly preferred.

M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond in which any hydrogen atom may be substituted by a fluorine atom, but the 1,4-phenylene group or the single bond is preferable. When C represents a ring structure other than a single bond, Z ²⁰¹ is preferably a linking group other than a single bond. When M ²⁰¹ is a single bond, Z ²⁰¹ is preferably a single bond.

From these points, in general formula (XX), the ring structure between Sp ²⁰¹ and Sp ²⁰² is specifically preferably the structure described below.

In the general formula (XX), when M ²⁰¹ represents a single bond and the ring structure is formed of two rings, the following formulas (XXa-1) to (XXa-5) are preferably represented, It is more preferable to represent the formula (XXa-3) from (XXa-1), and it is particularly preferable to represent the formula (XXa-1).

(In the formula, both ends shall be bonded to Sp ²⁰¹ or Sp ^202. )

Polymerizable compounds containing these skeletons are optimal for PSA-type liquid crystal display elements because of their ability to regulate alignment after polymerization, and display alignment is suppressed, or display unevenness is suppressed or does not occur at all.

From the above, as the polymerizable monomer, general formula (XX-1) to general formula (XX-4) are particularly preferable, and among them, general formula (XX-2) is most preferable.

(In the formula, benzene may be substituted with a fluorine atom, and Sp ²⁰ represents an alkylene group having 2 to 5 carbon atoms.)

In the case of adding a monomer to the composition of the present invention, the polymerization proceeds even when no polymerization initiator is present, but may contain a polymerization initiator in order to accelerate the polymerization. Examples of the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.

When the liquid crystal composition of the present invention contains a polymerizable compound, the content of the polymerizable compound is 0.001 to 5% by mass, 0.001 to 3% by mass, 0% to 100% by mass of the liquid crystal composition. It is preferably 0.001 to 2% by mass or 0.001 to 1% by mass.

The composition in the present invention can further contain a compound represented by the general formula (Q).

(Wherein, R ^Q represents a straight-chain alkyl group or branched alkyl group having from 1 22 carbon atoms, one or two or more CH ₂ groups in the alkyl group, so that the oxygen atoms are not directly adjacent a, -O -, - CH = CH -, - CO -, - OCO -, - COO -, - C≡C -, - CF 2 O -, - OCF 2 - may be replaced by, ^{M Q} is trans Represents a 1,4-cyclohexylene group, a 1,4-phenylene group or a single bond.)

^RQ represents a straight-chain alkyl group or a branched-chain alkyl group having 1 to 22 carbon atoms, and one or more CH ₂ groups in the alkyl group are —O—so that oxygen atoms are not directly adjacent to each other. —, —CH═CH—, —CO—, —OCO—, —COO—, —C≡C—, —CF ₂ O—, —OCF ₂ — may be substituted. Linear alkyl group, linear alkoxy group, linear alkyl group in which one CH ₂ group is substituted with —OCO— or —COO—, branched alkyl group, branched alkoxy group, one CH ₂ group is —OCO— Or a branched alkyl group substituted with —COO—, a linear alkyl group having 1 to 20 carbon atoms, a linear alkyl group in which one CH ₂ group is substituted with —OCO— or —COO—, branched Chain alkyl group, branched alkoxy group, one CH ₂ group Is more preferably a branched alkyl group substituted with —OCO— or —COO—. ^MQ represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond, and a trans-1,4-cyclohexylene group or a 1,4-phenylene group is preferred.

More specifically, the compound represented by the general formula (Q) is preferably a compound represented by the following general formula (Qa) to general formula (Qd).

In the formula, R ^Q1 is preferably a linear or branched alkyl group having 1 to 10 carbon atoms, R ^Q2 is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, and R ^Q3 is A straight-chain alkyl group having 1 to 8 carbon atoms, a branched-chain alkyl group, a straight-chain alkoxy group or a branched-chain alkoxy group is preferred, and L ^Q is preferably a straight-chain alkylene group or branched-chain alkylene group having 1 to 8 carbon atoms. . Of the compounds represented by general formula (Qa) to general formula (Qd), compounds represented by general formula (Qc) and general formula (Qd) are more preferable.

In the composition of the present invention, the compound represented by the general formula (Q) preferably contains one or two kinds, more preferably contains 1 to 5 kinds, and the content thereof is from 0.001. It is preferably 1%, more preferably 0.001 to 0.1%, and particularly preferably 0.001 to 0.05%.

More specifically, the following compounds (III-1) to (III-40) are preferred as antioxidants or light stabilizers that can be used in the present invention.

(In the formula, n represents an integer of 0 to 20.)

(In the formula, n represents an integer of 0 to 20.)

(In the formula, n represents an integer of 0 to 20.)

The composition of the present invention preferably contains one or more compounds represented by general formula (Q) or compounds selected from general formulas (III-1) to (III-40). It is more preferable to contain 5 types, and the content is preferably 0.001 to 1%, more preferably 0.001 to 0.1%, and particularly preferably 0.001 to 0.05%.

In the present invention, the composition containing a polymerizable compound is provided with liquid crystal alignment ability by polymerization of the polymerizable compound contained therein by ultraviolet irradiation, and the amount of transmitted light can be increased by utilizing the birefringence of the composition. Used for controlling liquid crystal display elements.

<< Liquid crystal display element >>
The liquid crystal display element of the present invention is characterized by using the above-described liquid crystal composition of the present invention.
For example, FIG. 1 is a cross-sectional view schematically showing the main part of a cell of an embodiment of the liquid crystal display element of the present invention. Examples of the liquid crystal display element of the present invention include a VA liquid crystal display element having the same cells as those shown in FIG.

The cell 2 </ b> C shown here includes a pair of substrates, a first substrate 23 and a second substrate 24. A first electrode 231 and a first alignment film 232 are stacked in this order on the surface of the first substrate 23 facing (opposite) the second substrate 24 toward the second substrate 24. A second electrode 241 and a second alignment film 242 are stacked in this order on the surface of the second substrate 24 facing (opposite) the first substrate 23 toward the first substrate 23. In the cell 2C, a liquid crystal composition can be sandwiched between the first substrate 23 and the second substrate 24. The first alignment film 232 and the second alignment film 242 control the alignment state of the sandwiched liquid crystal composition.
In FIG. 1, the symbol d ₃ represents a cell gap in the cell 2C.

Note that the cells shown in FIG. 1 are only some examples of cells that can be used in the present invention, and the cells that can be used in the present invention are not limited to these. For example, those in which various changes are made to these cells can be used in the present invention without departing from the spirit of the present invention.

In addition to the above, the liquid crystal display element of the present invention includes an IPS (in-plane switching) type or FFS (fringe field switching) type liquid crystal display element including the cell shown in FIG. 2 or FIG. .
The liquid crystal display element of this invention can be set as the structure similar to a well-known liquid crystal display element except the point which has the above-mentioned liquid crystal composition of this invention as a liquid crystal composition.
Hereinafter, the cells shown in FIGS. 2 and 3 will be described in detail.

FIG. 2 is a cross-sectional view schematically showing a main part of one embodiment of a cell used in the liquid crystal display element of the present invention.
The cell 2 </ b> A shown here includes a pair of substrates, a first substrate 21 and a second substrate 22. The first electrode 211A and the second electrode 212A are alternately arranged on the surface of the first substrate 21 facing (opposed to) the second substrate 22. Here, a case is shown in which the first electrode 211A corresponds to a positive electrode and the second electrode 212A corresponds to a negative electrode. In the cell 2A, a liquid crystal composition can be sandwiched between the first substrate 21 and the second substrate 22.

In the cell 2A, the cell gap d ₁ , the electrode width W ₁ of the first electrode 211A and the second electrode 212A, and the inter-electrode distance L ₁ between the first electrode 211A and the second electrode 212A are L ₁ / d ₁ > 1 and L ₁ / W ₁ > 1 is satisfied, the inter-electrode distance L ₁ is larger than the cell gap d ₁ and the electrode width W ₁ , and the first electrode 211A and the second electrode 212A do not have a structure close to each other And it has the electrode structure used with an IPS type | mold liquid crystal display element.

FIG. 3 is a cross-sectional view schematically showing a main part of another embodiment of the cell used in the liquid crystal display element of the present invention. 3 that are the same as those shown in FIG. 2 are assigned the same reference numerals as in FIG. 2, and detailed descriptions thereof are omitted.

The cell 2 </ b> B shown here includes a pair of substrates, a first substrate 21 and a second substrate 22. On the surface of the first substrate 21 that faces the second substrate 22, the second electrode 212 </ b> B and the insulating layer 213 are stacked in this order toward the second substrate 22, and the insulating layer 213 faces the second substrate 22. A plurality of first electrodes 211B are arranged on the surface to be spaced with a predetermined interval. Here, a case is shown in which the first electrode 211B corresponds to a positive electrode and the second electrode 212B corresponds to a negative electrode. In the cell 2B, a liquid crystal composition can be sandwiched between the first substrate 21 and the second substrate 22.
In the cell 2B, the cell gap d ₂ and the electrode width W ₂ of the first electrode 211B can be set to be the same as d ₁ and W ₁ in the cell 2A, for example. Cell 2B is a inter-electrode distance _{L 1} to 0 (zero) in it were cells 2A, has a structure formed by laminating a first electrode 211B and the second electrode 212B via the insulating layer 213, FFS type liquid crystal display It has an electrode configuration used in the device.

In particular, in the cell 2B of the FFS type, in addition to a direction (lateral direction) parallel to the surfaces of the first substrate 21 and the second substrate 22, a direction perpendicular to the surfaces of the first substrate 21 and the second substrate 22 is also provided. An electric field is also generated (in the vertical direction). In particular, a strong electric field is generated in the vertical direction in a region near the side surface of the first electrode 211B. In this case, unlike the cell used in the IPS liquid crystal display element, not only the liquid crystal molecules located between the electrodes (between the first electrode 211B and the second electrode 212B), but also on the electrodes (on the first electrode 211B, the first electrode The liquid crystal molecules located on the two electrodes 212B are also driven more strongly. Therefore, in such a cell 2B, the first electrode 211B and the second electrode 212B are respectively transparent electrodes so that the display function can be exhibited even in these electrode portions, and the liquid crystal display element including such a cell Can increase the aperture ratio.

Note that the cells shown in FIGS. 1, 2, and 3 are only examples of cells that can be used in the liquid crystal display element of the present invention, and the cells that can be used in the liquid crystal display element are not limited thereto. For example, the cells shown in FIGS. 1, 2 and 3 with various modifications can be used.

FIG. 4 is a diagram schematically showing an embodiment of the liquid crystal display element of the present invention. In FIG. 4, for convenience of explanation, each component is illustrated separately. The liquid crystal display element 10 shown here includes a first transparent insulating substrate (hereinafter sometimes abbreviated as “first substrate”) 12 having an alignment film 14 formed on the surface thereof, and a distance from the first substrate. A second transparent insulating substrate (hereinafter sometimes abbreviated as “second substrate”) 17 provided on the surface and having an alignment film 14 formed thereon is filled between the first substrate 12 and the second substrate 17. A liquid crystal layer 15 in contact with the pair of alignment films, and an electrode layer 13 including a thin film transistor, a common electrode 122, and a pixel electrode 121 as an active element between the alignment film 14 and the first substrate 12. have.

As shown in FIG. 4, the liquid crystal display element 10 includes a first substrate 12 and a second substrate 17 which are arranged to face each other, and a liquid crystal layer 15 containing the liquid crystal composition is sandwiched between them. This is a liquid crystal display element of an electric field method (here, an FFS type which is a modification example of the IPS type). The first substrate 12 has an electrode layer 13 formed on the surface on the liquid crystal layer 15 side. In addition, a pair that directly contacts the liquid crystal composition constituting the liquid crystal layer 15 between the liquid crystal layer 15 and the first substrate 12 and between the liquid crystal layer 15 and the second substrate 17 to induce homogeneous alignment. These

alignment films

14 and 14 are provided, and the alignment directions of these alignment films 14 are substantially parallel to the surface of the first substrate 12 or the second substrate 17. That is, the liquid crystal molecules in the liquid crystal composition are aligned so as to be substantially parallel to the surface of the first substrate 12 or the second substrate 17 when no voltage is applied. As shown in FIGS. 4 and 6, the first substrate 12 and the second substrate 17 may be sandwiched between a pair of

polarizing plates

11 and 18. Further, as shown in FIGS. 4 and 6, a color filter 16 is provided between the second substrate 17 and the alignment film 14. The liquid crystal display element of the present invention may be a so-called color filter on array (COA), a color filter may be provided between an electrode layer including a thin film transistor and a liquid crystal layer, or the thin film transistor may be included. A color filter may be provided between the electrode layer and the second substrate.
The liquid crystal display element 10 shown here includes a first polarizing plate 11, a first substrate 12, an electrode layer 13 including a thin film transistor, an alignment film 14, a liquid crystal layer 15 including the liquid crystal composition, and an alignment film 14. The color filter 16, the second substrate 17, and the second polarizing plate 18 are sequentially stacked.

The first substrate 12 and the second substrate 17 can be made of a transparent insulating material having flexibility such as glass or plastic, and one is made of an opaque insulating material such as silicon. May be. The 1st board | substrate 12 and the 2nd board | substrate 17 are bonded together by sealing materials and sealing materials, such as an epoxy-type thermosetting composition arrange | positioned in the peripheral region, and hold | maintain the distance between board | substrates in the meantime. Therefore, for example, granular spacers such as glass particles, plastic particles, and alumina particles, or spacer columns made of a resin formed by a photolithography method may be arranged.

FIG. 5 is an enlarged plan view showing a region surrounded by the II line of the electrode layer 13 formed on the first substrate 12 in FIG. 6 is a cross-sectional view of the liquid crystal display element shown in FIG. 4 taken along the line III-III in FIG. As shown in FIG. 5, the electrode layer 13 including a thin film transistor formed on the surface of the first substrate 12 includes a plurality of gate lines 126 for supplying scanning signals and a plurality of source lines for supplying display signals. 125 are arranged in a matrix so as to cross each other. Note that FIG. 5 shows only a pair of gate wirings 126 and a pair of source wirings 125.
A unit pixel of the liquid crystal display device is formed by a region surrounded by the plurality of gate lines 126 and the plurality of source lines 125, and a pixel electrode 121 and a common electrode 122 are formed in the unit pixel. A thin film transistor including a source electrode 127, a drain electrode 124, and a gate electrode 128 is provided in the vicinity of the intersection of the gate wiring 126 and the source wiring 125. The thin film transistor is connected to the pixel electrode 121 as a switch element that supplies a display signal to the pixel electrode 121, and drives the pixel electrode 121. A common line 129 is provided in parallel with the gate wiring 126. The common line 129 is connected to the common electrode 122 in order to supply a common signal to the common electrode 122.

A preferred embodiment of the structure of the thin film transistor is, for example, as shown in FIG. 6, a gate electrode 111 formed on the surface of the first substrate 12, the gate electrode 111 covering the substantially entire surface of the first substrate 12. A gate insulating layer 112 provided so as to cover, a semiconductor layer 113 formed on the surface of the gate insulating layer 112 so as to face the gate electrode 111, and a protection provided so as to cover part of the surface of the semiconductor layer 113 A drain electrode 116 provided to cover the layer 114, one side edge of the protective layer 114 and the semiconductor layer 113, and to be in contact with the gate insulating layer 112 formed on the surface of the first substrate 12; 114 and the other side edge of the semiconductor layer 113 and a source electrode 117 provided so as to be in contact with the gate insulating layer 112 formed on the surface of the first substrate 12; It has an insulating protective layer 118 provided so as to cover the in-electrode 116 and the source electrode 117, a. In the thin film transistor, an anodized film (not shown) may be formed on the surface of the gate electrode 111 for reasons such as eliminating a step with the gate electrode.

Amorphous silicon, polycrystalline polysilicon, or the like can be used for the semiconductor layer 113. However, when a transparent semiconductor film such as ZnO, IGZO (In—Ga—Zn—O), or ITO is used, light caused by light absorption can be used. This is also preferable from the viewpoint of suppressing the harmful effects of carriers and increasing the aperture ratio of the element.
Further, an ohmic contact layer 115 may be provided between the semiconductor layer 113 and the drain electrode 116 or the source electrode 117 for the purpose of reducing the width and height of the Schottky barrier. For the ohmic contact layer 115, a material in which an impurity such as phosphorus such as n-type amorphous silicon or n-type polycrystalline polysilicon is added at a high concentration can be used.

The gate wiring 126, the source wiring 125, and the common line 129 are preferably metal, more preferably Al, Cu, Au, Ag, Cr, Ta, Ti, Mo, W, Ni, or an alloy thereof. Or an alloy thereof is particularly preferable. The insulating protective layer 118 is a layer having an insulating function, and is formed of silicon nitride, silicon dioxide, silicon oxynitride film, or the like.

In the embodiment shown in FIGS. 5 and 6, the common electrode 122 is a flat electrode formed on the substantially entire surface of the gate insulating layer 112 (that is, the first substrate 12), while the pixel electrode 121 is the common electrode. This is a comb-shaped electrode formed on the insulating protective layer 118 covering 122. That is, the common electrode 122 is disposed closer to the first substrate 12 than the pixel electrode 121, and these electrodes are disposed so as to overlap each other via the insulating protective layer 118. The pixel electrode 121 and the common electrode 122 are formed of a transparent conductive material such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), IZTO (Indium Zinc Tin Oxide), and the like. Since the pixel electrode 121 and the common electrode 122 are formed of a transparent conductive material, the area opened by the unit pixel area is increased, and the aperture ratio and the transmittance are increased.

Further, in order to form a fringe electric field between the pixel electrode 121 and the common electrode 122, an inter-electrode distance (minimum separation distance) R between the pixel electrode 121 and the common electrode 122 is set to be equal to that of the first substrate 12 and the second electrode. The distance between the substrates 17 is smaller than the inter-substrate distance G. Here, the interelectrode distance R represents the distance between the electrodes in a direction parallel to the surface of the substrate. FIG. 6 shows an example in which the inter-electrode distance R is 0 because the flat common electrode 122 and the comb-shaped pixel electrode 121 overlap each other, and the inter-electrode distance (minimum separation distance) R is the first substrate. Since the distance between the substrates 12 and the second substrate 17 is smaller than the inter-substrate distance (that is, the cell gap) G, a fringe electric field E is formed. Therefore, in the FFS liquid crystal display element, a horizontal electric field formed in a direction perpendicular to a line forming the comb shape of the pixel electrode 121 and a parabolic electric field can be used. The electrode width l of the comb-shaped portion of the pixel electrode 121 and the gap m of the comb-shaped portion of the pixel electrode 121 are preferably formed to such a width that all the liquid crystal molecules in the liquid crystal layer 15 can be driven by the generated electric field. . The interelectrode distance (minimum separation distance) R between the pixel electrode 121 and the common electrode 122 can be adjusted as the (average) film thickness of the gate insulating layer 112. Further, unlike the liquid crystal display element of the present invention, the inter-electrode distance (minimum separation distance) R between the pixel electrode 121 and the common electrode 122 is different between the first substrate 12 and the second substrate 17, unlike FIG. May be formed to be larger than the inter-substrate distance G (corresponding to the IPS type). Such a liquid crystal display element has, for example, a configuration in which comb-like pixel electrodes and comb-like common electrodes are alternately provided in substantially the same plane.

The liquid crystal display element of the present invention is preferably an FFS type liquid crystal display element using a fringe electric field, and the shortest separation distance between the adjacent common electrode 122 and the pixel electrode 121 is the alignment films 14 (inter-substrate distance). When the distance is shorter than the shortest separation distance, a fringe electric field is formed between the common electrode and the pixel electrode, and the horizontal and vertical alignments of the liquid crystal molecules can be efficiently used. In the case of the FFS type liquid crystal display element of the present invention, when a voltage is applied to the liquid crystal molecules arranged so that the major axis direction is parallel to the alignment direction of the alignment film, the pixel electrode 121 and the common electrode 122 are interposed. In addition, parabolic electric field lines are formed up to the top of the pixel electrode 121 and the common electrode 122, and are arranged perpendicular to the electric field in which the major axis of the liquid crystal molecules in the liquid crystal layer 15 is formed. Therefore, liquid crystal molecules can be driven even with low dielectric anisotropy.

The color filter 16 preferably forms a black matrix (not shown) in a portion corresponding to the thin film transistor and the storage capacitor 123 from the viewpoint of preventing light leakage. The color filter 16 is usually formed by three filters of R (red), G (green), and B (blue), and constitutes one dot of an image or an image. For example, these three filters are gate wirings. It is lined up in the extending direction. The color filter 16 can be produced by, for example, a pigment dispersion method, a printing method, an electrodeposition method, or a dyeing method. For example, a method for producing a color filter by a pigment dispersion method will be described. A curable coloring composition for a color filter is applied on a transparent substrate, subjected to a patterning treatment, and cured by heating or light irradiation. By performing this process for each of the three colors red, green, and blue, a pixel portion for a color filter can be produced. In addition, a so-called color filter on array in which pixel electrodes provided with active elements such as TFTs and thin film diodes are installed on the substrate may be employed.
On the electrode layer 13 and the color filter 16, a pair of alignment films 14 that are in direct contact with the liquid crystal composition constituting the liquid crystal layer 15 and induce homogeneous alignment are provided.
Further, the polarizing plate 11 and the polarizing plate 18 can be adjusted so that the viewing angle and the contrast are good by adjusting the polarization axis of each polarizing plate, and the transmission axes operate in the normally black mode. It is preferable to have a perpendicular transmission axis. In particular, it is preferable that one of the polarizing plate 11 and the polarizing plate 18 is disposed so as to have a transmission axis parallel to the alignment direction of the liquid crystal molecules. Further, it is preferable to adjust the product of the refractive index anisotropy of the liquid crystal and the cell gap so that the contrast is maximized. Further, a retardation film for widening the viewing angle may be used.

As another embodiment of the liquid crystal display element of the present invention, in the IPS type, the shortest separation distance between the adjacent common electrode and the pixel electrode is longer than the shortest separation distance between the liquid crystal alignment films, For example, when the common electrode and the pixel electrode are formed on the same substrate and the common electrode and the pixel electrode are alternately arranged, the shortest separation distance between the adjacent common electrode and the pixel electrode is And those having a structure that is longer than the shortest separation distance between the liquid crystal alignment films.

In the liquid crystal display element of the present invention, for example, after a film is formed on a substrate having an electrode layer and / or a surface of the substrate, a pair of substrates are separated and faced so that the film is inside, and then the liquid crystal It is preferable to manufacture by filling the composition between the substrates. In that case, it is preferable to adjust the space | interval of a board | substrate through a spacer.
It is preferable to adjust the distance between the substrates (the average thickness of the liquid crystal layer to be obtained, also referred to as the separation distance between the coatings) to be 1 to 100 μm. The average separation distance between the films is preferably 1.5 to 10 μm.
In the present invention, examples of the spacer used for adjusting the distance between the substrates include columnar spacers made of glass particles, plastic particles, alumina particles, a photoresist material, and the like.

The VA-type, FFS-type, or IPS-type liquid crystal display elements described with reference to FIGS. 1 to 6 are examples of the liquid crystal display elements of the present invention, and these liquid crystal display elements do not depart from the technical idea of the present invention. Various changes can be made within the range.

<< Liquid Crystal Display >>
The liquid crystal display of the present invention is characterized by including the liquid crystal display element of the present invention described above, and can have the same configuration as a known liquid crystal display except that the liquid crystal display element of the present invention is provided.
The liquid crystal display of the present invention can be used as a liquid crystal display in an image display device such as a liquid crystal television, a computer monitor, a mobile phone, an information terminal, or a game machine.

Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.

In addition, each code | symbol in Table 1 has the following meaning, respectively.
Tni: Nematic phase-isotropic liquid phase transition temperature (° C)
Δn: refractive index anisotropy at 25 ° C. Δε: dielectric anisotropy at 25 ° C. γ ₁ (25 ° C.): rotational viscosity at 25 ° C. (mPa · s)

[Examples 1 to 5, Comparative Example 1]
A liquid crystal composition having the following composition was prepared, and its physical properties (Tni, Δn, Δε, γ ₁ (25 ° C.)) were measured. The evaluation results are shown in Table 1.

As described above, the liquid crystal compositions of Examples 1 to 5 have a negative dielectric anisotropy (Δε) value, a small rotational viscosity γ ₁ (25 ° C.), a low viscosity, and a high-speed response. It was confirmed to have Among them, the liquid crystal compositions of Examples 1, 3 and 5 were particularly low in viscosity.
The liquid crystal compositions of Examples 1 to 5 had the same rotational viscosity γ ₁ (25 ° C.) as the liquid crystal composition of Comparative Example 1, but the dielectric anisotropy was higher than that of the liquid crystal composition of Comparative Example 1. The absolute value of (Δε) was large, and it had more excellent characteristics.

The liquid crystal composition of the present invention has a negative dielectric anisotropy (Δε) value, a small rotational viscosity (γ ₁ ), and a liquid crystal display device excellent in high-speed response, and a liquid crystal display It can be used for manufacturing.

2, 2A, 2B, 2C ... cells, 21, 23 ... first substrate, 22, 24 ... second substrate, 211A, 211B, 231 ... first electrode, 212A, 212B, 241 ... second electrode, 213 ... insulating layer, 232 ... first alignment layer 242 ... the second alignment _film, d _1, d _{2, d} 3, ... cell _gap, W 1, _{W 2} ... electrode width, L ₁ ... distance between electrodes 10 ... liquid crystal display element, 12 ... first transparent insulating substrate, 121 ... pixel electrode, 122 ... common electrode, 126 ... Gate wiring, 125 ... source wiring, 14 ... alignment film, 15 ... liquid crystal layer, 17 ... second transparent insulating substrate, R ... distance between electrodes, G ... between substrates distance

Claims

A liquid crystal composition having a negative value of dielectric anisotropy (Δε),
A compound selected from the group consisting of one or more compounds represented by the following general formula (i) and compounds represented by the following general formulas (N-1-1) and (N-1-2): A liquid crystal composition comprising one or more types and one or more types of compounds represented by the following general formula (ii).

(Wherein R i1 and R i2 each independently represents an alkenyl group having 2 to 8 carbon atoms,
R N111 , R N112 , R N121 , R N122 , R ii1, and R ii2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more adjacent non-adjacent alkyl groups in the alkyl group Each —CH 2 — may be independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—;
One or more hydrogen atoms in the cyclohexane ring in the general formula (N-1-1) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, One or two or more non-adjacent —CH 2 — in the alkyl group are each independently —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO. Optionally substituted by-
One hydrogen atom in the benzene ring in the general formula (N-1-1) may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. Or two or more non-adjacent —CH 2 — are each independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. You may,
One or more hydrogen atoms in the cyclohexane ring in the general formula (N-1-2) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, One or two or more non-adjacent —CH 2 — in the alkyl group are each independently —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO. Optionally substituted by-
In the general formula (N-1-2), one hydrogen atom in the benzene ring may be independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms. Or two or more non-adjacent —CH 2 — are each independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—. You may,
n ii1 represents 0 or 1. )
2. The liquid crystal composition according to claim 1, comprising three or more compounds selected from the group consisting of compounds represented by the general formulas (N-1-1), (N-1-2) and (ii).
The liquid crystal according to claim 1 or 2, comprising one or more compounds selected from the group consisting of compounds represented by the following general formulas (N-1), (N-2) and (N-3). Composition.

(Wherein, R N11 , R N12 , R N21 , R N22 , R N31 and R N32 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent 2 in the alkyl group) Two or more —CH 2 — may be each independently substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
A N11 , A N12 , A N21 , A N22 , A N31, and A N32 are each independently (a) a 1,4-cyclohexylene group (one —CH 2 — or adjacent to each other in this group). Two or more —CH 2 — that are not present may be replaced by —O—.)
(B) 1,4-phenylene group (one —CH═ present in this group or two or more —CH═ that are not adjacent to each other may be replaced by —N═)
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One —CH═ present in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent —CH═ may be replaced by —N═. ) And (d) represents a group selected from the group consisting of 1,4-cyclohexenylene groups, and the hydrogen atoms in the groups (a), (b), (c) and (d) are respectively It may be independently substituted with a cyano group, a halogen atom or an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent two or more —CH 2 — in the alkyl group are each independently — CH═CH—, —C≡C—, —O—, —CO—, —C Optionally substituted by OO— or —OCO—,
Z N11 , Z N12 , Z N21 , Z N22 , Z N31 and Z N32 are each independently a single bond, —CH 2 CH 2 —, — (CH 2 ) 4 —, —OCH 2 —, —CH 2 O—. , —COO—, —OCO—, —OCF 2 —, —CF 2 O—, —CH═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—,
XN21 represents a hydrogen atom or a fluorine atom,
T N31 represents —CH 2 — or an oxygen atom,
n N11 , n N12 , n N21 , n N22 , n N31, and n N32 each independently represent an integer of 0 to 3, but n N11 + n N12 , n N21 + n N22, and n N31 + n N32 are each independently When there are a plurality of A N11 to A N32 and Z N11 to Z N32 , they may be the same or different, but the general formula (N-1-1), The compounds represented by (N-1-2) and (ii) are excluded. )
One type of compound represented by the following general formula (N-1-3), wherein the compound represented by the general formula (N-1) contains the compound represented by the general formula (N-1) Or the liquid crystal composition of Claim 3 which is 2 or more types.

( Wherein R N131 and R N132 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently Optionally substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
One or more hydrogen atoms in the cyclohexane ring in the general formula (N-1-3) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, One or two or more non-adjacent —CH 2 — in the alkyl group are each independently —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO. Optionally substituted by-
One or more hydrogen atoms in the benzene ring in the general formula (N-1-3) may be each independently substituted with a halogen atom or an alkyl group having 1 to 8 carbon atoms, One or two or more non-adjacent —CH 2 — in the alkyl group are each independently —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO. Optionally substituted by-. )
The liquid crystal composition according to any one of claims 1 to 4, which contains one or more compounds represented by the following general formula (L).

(Wherein R L1 and R L2 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently Optionally substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
n L1 represents 0, 1, 2 or 3,
A L1 , A L2 and A L3 each independently represent (a) a 1,4-cyclohexylene group (one —CH 2 — present in the group or two or more —CH 2 — not adjacent to each other). May be replaced by -O-.)
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be replaced by —N═) and (c) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or 1,2 , 3,4-tetrahydronaphthalene-2,6-diyl, one —CH═ or two or more non-adjacent —CH═ may be replaced by —N═.
And a hydrogen atom in the group (a), the group (b) and the group (c) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom. ,
Z L1 and Z L2 are each independently a single bond, —CH 2 CH 2 —, — (CH 2 ) 4 —, —OCH 2 —, —CH 2 O—, —COO—, —OCO—, —OCF 2 -, -CF 2 O-, -CH = NN-CH-, -CH = CH-, -CF = CF- or -C≡C-
When n L1 is 2 or 3, and a plurality of A L2s are present, they may be the same or different, and when n L1 is 2 or 3, and a plurality of Z L2s are present, they are May be the same or different, but the general formulas (i), (ii), (N-1), (N-2), (N-1-1), (N-1-2) And the compound represented by (N-3). )
A liquid crystal display element using the liquid crystal composition according to any one of claims 1 to 5.
A liquid crystal display comprising the liquid crystal display element according to claim 6.