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WO1996003672A1 - Dispositif d'affichage a cristaux liquides equipe d'une fonction d'entree et appareil electronique utilisant ce dispositif - Google Patents

Dispositif d'affichage a cristaux liquides equipe d'une fonction d'entree et appareil electronique utilisant ce dispositif Download PDF

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Publication number
WO1996003672A1
WO1996003672A1 PCT/JP1995/001462 JP9501462W WO9603672A1 WO 1996003672 A1 WO1996003672 A1 WO 1996003672A1 JP 9501462 W JP9501462 W JP 9501462W WO 9603672 A1 WO9603672 A1 WO 9603672A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
display device
crystal display
crystal cell
input
Prior art date
Application number
PCT/JP1995/001462
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Wada
Original Assignee
Seiko Epson Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corporation filed Critical Seiko Epson Corporation
Priority to JP50564896A priority Critical patent/JP3613800B2/ja
Publication of WO1996003672A1 publication Critical patent/WO1996003672A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133502—Antiglare, refractive index matching layers

Definitions

  • Super twisted-donematic (STN) liquid crystal with large display capacity In the display element, a two-layer STN (DS TN) system in which a color tone compensating liquid crystal cell is superimposed on a display liquid crystal cell and arranged between two polarizing plates, or, for example, Japanese Patent Publication No. 3-50249
  • DS TN two-layer STN
  • FS TN film compensation type S TN
  • ambient light is transmitted through the input panel 12 and the liquid crystal cell 1 while passing through the surface of the transparent substrate 14 and the interface between the transparent substrate 14 and the transparent electrode 16.
  • Upper polarizer 8 and retarder 10 interface between retarder 10 and transparent substrate 5; interface between transparent substrate 5 and transparent electrode 3; interface between transparent electrode 3 and liquid crystal layer 7; interface between liquid crystal layer 7 and transparent electrode 4
  • the input panel is of a so-called Utsuchi panel type in which input electrodes are provided on opposing surfaces of a pair of input electrode substrates separated at a fixed interval, and input electrodes are provided on both surfaces of a transparent electrode substrate.
  • Each type can be used to form coordinates and determine coordinates by contact with a stylus pen or the like.
  • an air layer is formed between the input electrode substrates.
  • the amount of light reflected from the inside of the input panel is reduced due to the presence of the air layer. Good display of contrast can be obtained.
  • the input panel advantageously has a retardation value of 50 nm or less.
  • the polarizing plate is disposed outside the input panel, coloring is effectively suppressed by reducing the retardation.
  • the angle 0 is twisted between the alignment direction 45 of the liquid crystal molecules in contact with the inner surface of the upper electrode substrate 23 of the liquid crystal cell 21 and the alignment direction 41 of the liquid crystal molecules in contact with the inner surface of the lower electrode substrate 24. Is the twist angle of the liquid crystal 27. Note that each of the angles was positive in a counterclockwise direction. This torsion angle 0 is 180 ° to 360 ° described above. By stabilizing at an angle within the range, a good contrast can be obtained.
  • the phase difference plate 28 is brought into close contact with the surface of the upper electrode substrate of the liquid crystal cell 21, no air layer is formed between them, so that the phase difference plate 28 does not pass through the liquid crystal cell after passing through the phase difference plate.
  • the amount of light reflected is small. Therefore, according to the liquid crystal display device of the present invention, the reflected light can be effectively prevented from being colored by the retardation plate, and a more excellent black-and-white display can be obtained.
  • a nematic liquid crystal having a refractive index anisotropy ⁇ n force of 0.132 is used, and the liquid crystal cell 21 is filled so that the layer thickness d is 6.3 m.
  • the product ⁇ n ⁇ d of the anisotropy ⁇ n and the liquid crystal layer thickness d was 0.83 m.
  • an appropriate amount of an optically active agent was added so that the twist angle of the liquid crystal molecules was stabilized at 240 degrees.
  • Example 2 The configuration was the same as in Example 1, except that the upper electrode substrate 32 of the input panel 31 was replaced with the polyethersulfone 'film of Example 1, but had a thickness of 120 ⁇ m and a retardation of 6 nm. Polycarbonate film was used. Except for this point, a liquid crystal display device was configured.
  • Each angle in FIG. 2 was set to 100 degrees, 70 degrees, 7 degrees 130 degrees, and 240 degrees.
  • the liquid crystal cell 21 is filled so that the layer thickness d becomes 6.3 jum, and the refractive index anisotropy ⁇ n and the layer thickness
  • the product of d A n 'd is 0.83 ⁇ m.
  • an appropriate amount of an optically active agent was added so that the twist angle of the liquid crystal molecules was stabilized at 240 degrees.
  • the structure was the same as in Examples 1 to 4, except that the upper polarizing plate 37 had a non-glare-treated Nitto Denko polarizing plate NPF-G1225DUA. G30 was used. As a result, the reflection of an image due to specular reflection on the upper polarizing plate surface was eliminated, and the display became much easier to see.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Position Input By Displaying (AREA)
  • Liquid Crystal (AREA)

Abstract

Dispositif d'affichage à cristaux liquides à réflexion ou à réflexion semi-transparente dans lequel un panneau d'entrée possédant une paire d'électrodes d'entrée éloignées l'une de l'autre selon un espace prédéterminé, fait partie du même ensemble qu'une cellule de cristaux liquides de type FSTN. Ce dispositif comprend une première et une deuxième plaques de polarisation prenant en sandwich le panneau d'entrée et la cellule de cristaux liquides et une plaque de différence de phases constituée par une feuille en polymère optiquement anisotrope vient en contact étroit avec la surface de la cellule de cristaux liquides. La diminution de la quantité de lumière incidente dans le panneau d'entrée sous l'effet de la première plaque de polarisation provoque la décroissance de la quantité de lumière réfléchie au niveau de la limite entre le panneau d'entrée et la couche d'air ou réfléchie depuis la cellule de cristaux liquides. De plus, étant donné l'absence de couche d'air entre la cellule de cristaux liquides et la plaque de différence de phases, on peut empêcher la coloration causée par la lumière réfléchie traversant soit ladite cellule, soit ladite plaque et réaliser un affichage en noir et blanc extrêmement contrasté.
PCT/JP1995/001462 1994-07-21 1995-07-21 Dispositif d'affichage a cristaux liquides equipe d'une fonction d'entree et appareil electronique utilisant ce dispositif WO1996003672A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50564896A JP3613800B2 (ja) 1994-07-21 1995-07-21 入力機能付き液晶表示素子及びそれを用いた電子機器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6/169637 1994-07-21
JP16963794 1994-07-21

Publications (1)

Publication Number Publication Date
WO1996003672A1 true WO1996003672A1 (fr) 1996-02-08

Family

ID=15890191

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1995/001462 WO1996003672A1 (fr) 1994-07-21 1995-07-21 Dispositif d'affichage a cristaux liquides equipe d'une fonction d'entree et appareil electronique utilisant ce dispositif

Country Status (2)

Country Link
JP (1) JP3613800B2 (fr)
WO (1) WO1996003672A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7184027B2 (en) 2000-10-13 2007-02-27 Denso Corporation Touch panel, display device and method of producing touch panel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH024230A (ja) * 1988-06-21 1990-01-09 Sanyo Electric Co Ltd 液晶表示器
JPH03121523A (ja) * 1989-10-04 1991-05-23 Sharp Corp タッチパネル一体型液晶表示装置
JPH03291623A (ja) * 1990-04-10 1991-12-20 Nippon Oil Co Ltd 液晶表示素子用補償板
JPH05127822A (ja) * 1991-10-30 1993-05-25 Daicel Chem Ind Ltd タツチパネル
JPH05173707A (ja) * 1991-12-20 1993-07-13 Sharp Corp 手書き入力タブレット

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH024230A (ja) * 1988-06-21 1990-01-09 Sanyo Electric Co Ltd 液晶表示器
JPH03121523A (ja) * 1989-10-04 1991-05-23 Sharp Corp タッチパネル一体型液晶表示装置
JPH03291623A (ja) * 1990-04-10 1991-12-20 Nippon Oil Co Ltd 液晶表示素子用補償板
JPH05127822A (ja) * 1991-10-30 1993-05-25 Daicel Chem Ind Ltd タツチパネル
JPH05173707A (ja) * 1991-12-20 1993-07-13 Sharp Corp 手書き入力タブレット

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MICROFILM OF THE SPECIFICATION AND DRAWINGS ANNEXED TO THE WRITTEN APPLICATION OF JAPANESE UTILITY MODEL, Application No. 110851/1989, (Laid-Open No. 51414/1991) (CASIO COMPUTER CO., LTD.), (20.05.91). *
MICROFILM OF THE SPECIFICATION AND DRAWINGS ANNEXED TO THE WRITTEN APPLICATION OF JAPANESE UTILITY MODEL, Application No. 78882/1989, (Laid-Open No. 19299/1991) (YAMAGATA CASIO COMPUTER K.K.), (26.02.91). *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7184027B2 (en) 2000-10-13 2007-02-27 Denso Corporation Touch panel, display device and method of producing touch panel
US7492347B2 (en) 2000-10-13 2009-02-17 Denso Corporation Touch panel, display device and method of producing touch panel
US7777726B2 (en) 2000-10-13 2010-08-17 Denso Corporation Touch panel, display device and method of producing touch panel

Also Published As

Publication number Publication date
JP3613800B2 (ja) 2005-01-26

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