CN119126448A - Double-sided reflective display panel - Google Patents
Double-sided reflective display panel Download PDFInfo
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- CN119126448A CN119126448A CN202411533427.8A CN202411533427A CN119126448A CN 119126448 A CN119126448 A CN 119126448A CN 202411533427 A CN202411533427 A CN 202411533427A CN 119126448 A CN119126448 A CN 119126448A
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- 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
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
- G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
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- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- 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
- G02F1/133553—Reflecting elements
- G02F1/133555—Transflectors
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- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
Abstract
The application provides a double-sided reflection display panel which comprises a first dimming liquid crystal box, a first transflective layer, a second transflective layer and a second dimming liquid crystal box which are sequentially arranged. The first light-dimming liquid crystal box and the second light-dimming liquid crystal box are provided with the first light-transmitting and reflecting layer and the second light-transmitting and reflecting layer, the first light-transmitting axis of the first light-transmitting and reflecting layer is parallel to the second light-reflecting axis of the second light-transmitting and reflecting layer, and the second light-transmitting axis of the second light-transmitting and reflecting layer is parallel to the first light-reflecting axis of the first light-transmitting and reflecting layer.
Description
Technical Field
The application relates to the technical field of display panels, in particular to a double-sided reflection display panel.
Background
The Liquid crystal display technology (Liquid CRYSTAL DISPLAY, LCD) is steadily dominant in the display market due to its excellent performance and complete technology system. According to different utilization modes of the light source, the liquid crystal display technology is finely divided into three categories of transmission type, reflection type and transflective type (or referred to as semi-transparent semi-reflective type). Particularly, the reflective and transflective liquid crystal display devices exhibit unique advantages in outdoor applications, which can efficiently use ambient light, meet display requirements by reflecting external light, reduce dependency on built-in light sources, enhance visual clarity in outdoor environments, and achieve energy saving effects.
However, the reflective display panels currently in the market are limited to single-sided display, and the limitation limits the application potential of the reflective display panels in multiple fields to a certain extent. Especially in public spaces such as digital billboards, communication electronic equipment, cashing terminals, consultation window services, exhibition venues and the like, display equipment is often required to transmit information to two directions simultaneously so as to adapt to the viewing demands of audience in different positions. By taking an exhibition venue as an example, one exhibition board with a double-sided display function can simultaneously display contents to two sides of an exhibition area, and the audience does not need to move positions or gather one side, so that the information propagation rate and the audience exhibition experience are obviously improved.
Disclosure of Invention
The application provides a double-sided reflection display panel, which can improve the utilization rate of ambient light on one hand so as to improve the display brightness and the display effect, and can reduce the power consumption and save energy on the other hand.
In order to achieve the above object, the present application provides a double-sided reflective display panel, comprising a first dimming liquid crystal cell, a first transflective layer, a second transflective layer, and a second dimming liquid crystal cell, which are sequentially arranged, wherein:
The first dimming liquid crystal box comprises a first substrate, a first opposite substrate arranged opposite to the first substrate, and a first cholesteric liquid crystal layer arranged between the first substrate and the first opposite substrate, wherein the first opposite substrate is closely adjacent to the first transflective layer, a first control electrode is arranged on the first substrate closely adjacent to the first cholesteric liquid crystal layer, a first color resistance layer is arranged on one side, close to the first control electrode, of the first substrate, and is used for selectively transmitting a first preset color, a second control electrode is arranged on the first opposite substrate closely adjacent to the first cholesteric liquid crystal layer, and the first cholesteric liquid crystal layer comprises first cholesteric liquid crystal and is used for transmitting or reflecting light;
The second dimming liquid crystal box comprises a second substrate, a second opposite substrate arranged opposite to the second substrate, and a second cholesteric liquid crystal layer arranged between the second substrate and the second opposite substrate, wherein the second opposite substrate is closely adjacent to the second transflective layer, a third control electrode is arranged on the second substrate closely adjacent to the second cholesteric liquid crystal layer, a second color resistance layer is arranged on one side, close to the third control electrode, of the second substrate, and is used for selectively transmitting a second preset color, a fourth control electrode is arranged on the second opposite substrate closely adjacent to the second cholesteric liquid crystal layer, the second cholesteric liquid crystal layer comprises second cholesteric liquid crystal, and the second dimming liquid crystal box is used for transmitting or reflecting light;
The first light transmitting and reflecting layer is provided with a first light transmitting axis and a first reflecting axis, the first light transmitting and reflecting layer can transmit light rays parallel to the first light transmitting axis and reflect light rays parallel to the first reflecting axis, the second light transmitting and reflecting layer is provided with a second light transmitting axis and a second reflecting axis, the second light transmitting and reflecting layer can transmit light rays parallel to the second light transmitting axis and reflect light rays parallel to the second reflecting axis, the first light transmitting axis and the second reflecting axis are parallel to each other, and the second light transmitting axis and the first reflecting axis are parallel to each other.
As a further improvement of the present application, the first cholesteric liquid crystal has a transparent state, a focal conic state, and a planar texture state;
When the first cholesteric liquid crystal is in a planar texture state, the first cholesteric liquid crystal can reflect light with a specific color;
when the first cholesteric liquid crystal is in a transparent state, the first cholesteric liquid crystal has a transmission function for light;
When the first cholesteric liquid crystal is in a focal conic state, the first cholesteric liquid crystal can scatter light rays and increase the emergent angle of the light rays;
and/or, the second cholesteric liquid crystal has a transparent state, a focal conic state, and a planar texture state;
When the second cholesteric liquid crystal is in a planar texture state, the second cholesteric liquid crystal can reflect light with a specific color;
When the second cholesteric liquid crystal is in a transparent state, the second cholesteric liquid crystal has a transmission function for light;
When the second cholesteric liquid crystal is in a focal conic state, the second cholesteric liquid crystal can scatter light rays and increase the emergent angle of the light rays.
As a further improvement of the application, the double-sided display panel is provided with a plurality of pixel units arranged in an array,
The first color resistance layer comprises a plurality of first color resistance blocks, a plurality of second color resistance blocks and a plurality of first non-color resistance areas which are distributed in an array, the plurality of first color resistance blocks, the plurality of second color resistance blocks and the plurality of first non-color resistance areas are respectively positioned in a plurality of pixel units, the first color resistance blocks selectively transmit light rays of a first color, the second color resistance blocks selectively transmit light rays of a second color, the first non-color resistance areas transmit light rays of various colors, the areas of the first cholesteric liquid crystal layer corresponding to the first non-color resistance areas reflect light rays of a third color, the second control electrode comprises a plurality of first pixel electrodes which are distributed in an array, and the plurality of first pixel electrodes are positioned in the plurality of pixel units;
And/or the second color resistance layer comprises a plurality of third color resistance blocks, a plurality of fourth color resistance blocks and a plurality of second colorless resistance regions which are distributed in an array, the third color resistance blocks, the fourth color resistance blocks and the second colorless resistance regions are respectively positioned in a plurality of pixel units, the third color resistance blocks selectively transmit light rays of a first color, the fourth color resistance blocks selectively transmit light rays of a second color, the second colorless resistance regions transmit light rays of various colors, the regions of the second cholesteric liquid crystal layer corresponding to the second colorless resistance regions reflect light rays of the third color, and the fourth control electrode comprises a plurality of second pixel electrodes which are distributed in an array, and the second pixel electrodes are positioned in the pixel units.
As a further improvement of the present application, any one of the light of the first color, the light of the second color, and the light of the third color is red light, another one of which is green light, and another one of which is blue light.
As a further improvement of the application, when the cholesteric liquid crystals corresponding to the first color blocking blocks and the second color blocking blocks are in a transparent state or a focal conic state, the cholesteric liquid crystals corresponding to the first colorless blocking regions are in a planar texture state;
And/or when the cholesteric liquid crystal corresponding to the third color blocking blocks and the fourth color blocking blocks is in a transparent state or a focal conic state, the cholesteric liquid crystal corresponding to the second colorless blocking areas is in a planar texture state.
As a further improvement of the application, the first cholesteric liquid crystal layer comprises a first dye liquid crystal which keeps consistent with the color of the first cholesteric liquid crystal under the preset condition, and/or the second cholesteric liquid crystal layer comprises a second dye liquid crystal which keeps consistent with the color of the second cholesteric liquid crystal under the preset condition.
As a further improvement of the present application, a first black substrate is disposed on the first pixel electrode corresponding to the first non-color resist region, the first black substrate being adjacent to the first counter substrate;
And/or, a second black substrate is arranged on the second pixel electrode corresponding to the second non-color resistance region, and the second black substrate is adjacent to the second opposite substrate.
As a further improvement of the application, when the cholesteric liquid crystals corresponding to the first color blocking blocks and the second color blocking blocks are in a plane texture state, the cholesteric liquid crystals corresponding to the first colorless blocking areas are in a transparent state or a focal conic state;
And/or when the cholesteric liquid crystal corresponding to the third color blocking blocks and the fourth color blocking blocks presents a plane texture state, the cholesteric liquid crystal corresponding to the second colorless blocking areas presents a transparent state or a focal conic state.
As a further improvement of the present application, the first and second transflector layers are both APF films or metal wire grid polarizers.
As a further improvement of the present application, the first substrate, the first counter substrate, the second substrate, and the second counter substrate are respectively made of transparent glass or transparent plastic, and the first control electrode, the second control electrode, the third control electrode, and the fourth control electrode are respectively made of transparent conductive materials.
The double-sided reflective display panel has the beneficial effects that the first transparent reflecting layer and the second transparent reflecting layer are arranged between the first dimming liquid crystal box and the second dimming liquid crystal box, the first transparent optical axis of the first transparent reflecting layer is parallel to the second reflecting axis of the second transparent reflecting layer, and the second transparent optical axis of the second transparent reflecting layer is parallel to the first reflecting axis of the first transparent reflecting layer. In addition, the first dimming liquid crystal box and the second dimming liquid crystal box are respectively provided with a first cholesteric liquid crystal and a second cholesteric liquid crystal, and the cholesteric liquid crystals can be switched between different states, so that the energy consumption is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of a dual-sided reflective display panel according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view showing another state of the double-sided reflective display panel according to the embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view showing another state of the dual-sided reflective display panel according to the embodiment of the present invention;
Fig. 4 is a schematic cross-sectional view illustrating still another state of the dual sided reflective display panel according to the embodiment of the present invention.
In the figure, 1, a first dimming liquid crystal cell, 2, a first transreflective layer, 3, a second transreflective layer, 4, a second dimming liquid crystal cell, 11, a first substrate, 12, a first opposite substrate, 13, a first control electrode, 14, a second control electrode, 15, a first cholesteric liquid crystal layer, 16, a first color resistance layer, 21, a second substrate, 22, a second opposite substrate, 23, a third control electrode, 24, a fourth control electrode, 25, a second cholesteric liquid crystal layer, 26, and a second color resistance layer.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
The terms upper, lower, left, right, front, rear, top, bottom and the like (if any) in the description and in the claims are used for descriptive purposes and not necessarily for describing relative positions of structures in the figures and in describing relative positions of structures. It should be understood that the use of directional terms should not be construed to limit the scope of the application as claimed.
Example 1
Fig. 1 is a schematic cross-sectional view of a state of a dual-sided reflective display panel according to an embodiment of the present invention, as shown in fig. 1, the embodiment provides a dual-sided reflective display panel, which uses external ambient light as a light source, and includes a first dimming liquid crystal cell 1, a first transflective layer 2, a second transflective layer 3, and a second dimming liquid crystal cell 4 sequentially disposed, wherein:
The first dimming liquid crystal box 1 comprises a first substrate 11, a first opposite substrate 12 arranged opposite to the first substrate 11, and a first cholesteric liquid crystal layer 15 arranged between the first substrate 11 and the first opposite substrate 12, wherein the first opposite substrate 12 is adjacent to the first transflective layer 2, a first control electrode 13 is arranged on the first substrate 11 adjacent to the first cholesteric liquid crystal layer 15, a first color resistance layer 16 is arranged on one side, close to the first control electrode 13, of the first substrate 11, the first color resistance layer 16 is used for selectively transmitting a first preset color, a second control electrode 14 is arranged on the first opposite substrate 12 adjacent to the first cholesteric liquid crystal layer 15, and the first cholesteric liquid crystal layer 15 comprises first cholesteric liquid crystal and is used for transmitting or reflecting light;
The second dimming liquid crystal box 4 comprises a second substrate 21, a second opposite substrate 22 opposite to the second substrate 21 and a second cholesteric liquid crystal layer 25 arranged between the second substrate 21 and the second opposite substrate 22, the second opposite substrate 22 is adjacent to the second transflective layer 3, a third control electrode 23 is arranged on the second substrate 21 adjacent to the second cholesteric liquid crystal layer 25, a second color resistance layer 26 is arranged on one side of the second substrate 21 adjacent to the third control electrode 23, the second color resistance layer 26 is used for selectively transmitting a second preset color, a fourth control electrode 24 is arranged on the second opposite substrate 22 adjacent to the second cholesteric liquid crystal layer 25, the second cholesteric liquid crystal layer 25 comprises second cholesteric liquid crystal, and the second dimming liquid crystal box 4 is used for transmitting or reflecting light;
The first and second transflective layers 2 and 3 are each capable of transmitting light of a specific polarization direction and reflecting light of a specific polarization direction. The first transflective layer 2 has a first light transmission axis and a first light reflection axis, the first transflective layer 2 is capable of transmitting light parallel to the first light transmission axis and reflecting light parallel to the first light reflection axis, the second transflective layer 3 has a second light transmission axis and a second light reflection axis, the second light transmission layer 3 is capable of transmitting light parallel to the second light transmission axis and reflecting light parallel to the second light reflection axis, the first light transmission axis and the second light reflection axis are parallel to each other, and the second light transmission axis and the first light reflection axis are parallel to each other.
Specifically, the working principle of the double-sided reflective display panel is that the first transflective layer 2 and the second transflective layer 3 are APF (Advance Polarizer Film) films, namely reflective polarized ultrathin optical films, the first light transmission axis of the first transflective layer 2 is 0 °, the first light reflection axis is 90 °, and the second light transmission axis of the second transflective layer 3 is 90 °, respectively (of course, in other embodiments, the first light transmission axis, the first light reflection axis, the second light transmission axis and the second light reflection axis may be other angles, as long as the first light transmission axis and the second light reflection axis are ensured to be parallel to each other, and the second light transmission axis and the first light reflection axis are ensured to be parallel to each other).
When the first dimming liquid crystal box 1 displays a picture (i.e. the upper side of the double-sided reflective display panel displays the picture), the first cholesteric liquid crystal layer 15 in the first dimming liquid crystal box 1 presents a transparent state, a focal conic state or a plane texture state, incident light (ambient light) sequentially passes through the first color resistance layer 16, the first cholesteric liquid crystal layer 15 and the first transflective layer 2, when passing through the first transflective layer 2, light with a polarization direction of 90 degrees is reflected by the first transflective layer 2, and light with a polarization direction of 0 degrees passes through the first transflective layer 2 and then reaches the second transflective layer 3 to be reflected by the second transflective layer 3, so that light with the polarization directions of 0 degrees and 90 degrees can be reflected and utilized, thereby improving the utilization ratio of the ambient light, and improving the display brightness and display effect.
Similarly, when the second dimming liquid crystal box 4 displays a picture (i.e. the lower side of the double-sided reflective display panel displays a picture), the second cholesteric liquid crystal layer 25 in the second dimming liquid crystal box 4 presents a transparent state, a focal conic state or a planar texture state, and after incident light (ambient light) sequentially passes through the second color blocking layer 26, the second cholesteric liquid crystal layer 25 and the second transflective layer 3, when passing through the second transflective layer 3, light with a polarization direction of 0 ° is reflected by the second transflective layer 3, and light with a polarization direction of 90 ° passes through the second transflective layer 3 and then reaches the first transflective layer 2 and is reflected by the first transflective layer 2, so that light with a polarization direction of 0 ° and 90 ° can be reflected and utilized, thereby improving the utilization ratio of ambient light, and improving the display brightness and display effect. Of course, in other embodiments, the first and second transflector layers 2, 3 may also be metal wire grid polarizers.
In an alternative embodiment, the first cholesteric liquid crystal has a transparent state, a focal conic state, and a planar texture state, and is capable of switching between the three states. When the first cholesteric liquid crystal is in a focal conic state (i.e., FC focal conic state), the first cholesteric liquid crystal can scatter light (scatter light), increase the exit angle of light, and further increase the viewing angle range (it should be noted that, for the first dimming liquid crystal cell 1, light reflected by the first and second transflective layers 2 and 3 can scatter through the first cholesteric liquid crystal layer 15, and for the second dimming liquid crystal cell 4, light reflected by the first and second transflective layers 2 and 3 can scatter through the second cholesteric liquid crystal layer 25). When the first cholesteric liquid crystal is in a transparent state (i.e. H-field nematic state), it has a transmission function for light (no scattering of light is possible at this time), i.e. light can pass directly through the first cholesteric liquid crystal layer 15. When the first cholesteric liquid crystal is in a planar texture state (i.e., P-state), the first cholesteric liquid crystal can reflect light of a specific color, that is, the first dimming liquid crystal cell 1 can reflect light of a specific color.
Similarly, the second cholesteric liquid crystal also has a transparent state, a focal conic state, and a planar texture state, and is capable of switching between the three states. When the second cholesteric liquid crystal is in a focal conic state (namely, FC focal conic state), the second cholesteric liquid crystal can scatter light (scatter light), so that the emergent angle of the light is increased, and the visual angle range is further enlarged. When the second cholesteric liquid crystal is in a transparent state (i.e. H-field nematic state), it has a transmission function for light (no scattering of light is possible at this time), i.e. light can pass directly through the second cholesteric liquid crystal layer 25. When the second cholesteric liquid crystal is in a planar texture state (i.e., P-state), the second cholesteric liquid crystal can reflect light of a specific color, that is, the second dimming liquid crystal cell 4 can reflect light of a specific color. In addition, the FC focal conic state is steady state, long-time power supply is not needed, and when the first cholesteric liquid crystal and/or the second cholesteric liquid crystal are in the focal conic state, the double-sided display panel is in a low-power consumption energy-saving mode.
Specifically, in this embodiment, when the first cholesteric liquid crystal and the second cholesteric liquid crystal both exhibit the focal conic state, the transmissive state or the planar texture state, the dual-sided reflective display panel performs the image display, the first dimming liquid crystal cell 1 displays the first preset color through which the first color resist layer 16 selectively passes, and the second dimming liquid crystal cell 4 displays the second preset color through which the second color resist layer 26 selectively passes. The difference is that the brightness and angle of the display picture of the double-sided reflective display panel are not consistent in the three states. The first preset color and the second preset color may or may not be identical. In this embodiment, the first color resist layer 16 can absorb other colors than red light, the second color resist layer 26 can absorb other colors than red light, and therefore, the first dimming liquid crystal cell 1 displays red, the second dimming liquid crystal cell 4 displays red, and the double-sided reflective display panel can display a single red color display. In other embodiments, the dimming cell may also display other colors of light, such as blue, green, etc., by replacing the different color resists.
In an alternative embodiment, the first substrate 11, the first counter substrate 12, the second substrate 21, and the second counter substrate 22 may be made of transparent glass, transparent plastic, or the like. The first control electrode 13, the second control electrode 14, the third control electrode 23, and the fourth control electrode 24 may be made of transparent conductive materials, such as Indium Tin Oxide (ITO), indium Zinc Oxide (IZO), or aluminum zinc oxide.
The embodiment of the invention also provides a display device which comprises the double-sided reflection display panel.
According to the double-sided reflection display panel provided by the embodiment of the invention, the first transflective layer 2 and the second transflective layer 3 are arranged between the first dimming liquid crystal box 1 and the second dimming liquid crystal box 4, and the first light transmission axis of the first transflective layer 2 and the second light reflection axis of the second transflective layer 3 are parallel to each other, so that when the double-sided reflection display panel displays pictures, light rays with polarization directions parallel to the first light reflection axis can be reflected and utilized by the first transflective layer 2, and light rays with polarization directions parallel to the second light reflection axis can be reflected and utilized by the second transflective layer 3 (whether single-sided display or double-sided display can utilize the first light transmission and reflection axes 2 and the second light reflection axes 3 to reflect light rays), thereby improving the utilization rate of ambient light and improving the display brightness and display effect.
Example two
With continued reference to fig. 1, the dual-sided display panel is provided with a plurality of pixel units arranged in an array, the first color resist layer 16 includes a plurality of first color resist blocks, a plurality of second color resist blocks, a plurality of first non-color resist areas arranged in an array, the plurality of first color resist blocks, the plurality of second color resist blocks and the plurality of first non-color resist areas are respectively located in the plurality of pixel units, the first color resist blocks selectively transmit light of the first color, the second color resist areas selectively transmit light of the second color, the first non-color resist areas transmit light of the third color, the first non-color resist areas correspond to the first cholesteric liquid crystal layer 15, the second control electrode 14 includes a plurality of first pixel electrodes arranged in an array, the plurality of first pixel electrodes are located in the plurality of pixel units, and/or the second color resist layer 26 includes a plurality of third color resist blocks, a plurality of fourth color resist areas, the plurality of second non-color resist areas selectively transmit light of the first color, the plurality of second color resist blocks and the second non-color resist areas selectively transmit light of the second color, the second control electrode 24 is located in the plurality of second non-color resist areas, the second control electrode is located in the plurality of pixel units, and the second control electrode is located in the plurality of non-color areas. Cholesteric liquid crystals in a plurality of pixel units which are arranged in an array are respectively and independently controlled in the double-sided display panel.
In an alternative embodiment, any one of the first color light, the second color light, and the third color light is red light, another one of which is green light, and another one of which is blue light.
In an alternative embodiment, the first cholesteric liquid crystal layer 15 comprises a first dye liquid crystal that is consistent with the color exhibited by the first cholesteric liquid crystal under preset conditions, and/or the second cholesteric liquid crystal layer 25 comprises a second dye liquid crystal that is consistent with the color exhibited by the second cholesteric liquid crystal under preset conditions. For example, the first cholesteric liquid crystal reflects red color in the planar texture state, where the first dye liquid crystal absorbs light other than red color, and/or the second cholesteric liquid crystal reflects red color in the planar texture state, where the second dye liquid crystal absorbs light other than red color.
In particular, in this embodiment, the first cholesteric liquid crystal and the second cholesteric liquid crystal are each capable of reflecting red light, the first dye liquid crystal and the second dye liquid crystal are each capable of absorbing other light than red, the first color block and the third color block are each capable of absorbing other colors than green, i.e., selectively transmitting green, and the second color block and the fourth color block are each capable of absorbing other colors than blue, i.e., selectively transmitting blue. In other embodiments, the first cholesteric liquid crystal and the second cholesteric liquid crystal can display other colors of light, such as blue light, green light, etc., and the first color block, the second color block, the third color block, the fourth color block can selectively transmit other colors of light, such as red light, etc.
Specifically, the working principle of the double-sided reflective display panel is that the first transflective layer 2 and the second transflective layer 3 are APF (Advance Polarizer Film) films, and the working principle is referred to the above discussion and is not repeated here.
Fig. 1 is a schematic cross-sectional view showing a state of the double-sided reflective display panel of the present embodiment, specifically, the first cholesteric liquid crystal layer 15 corresponding to the first color blocks and the second color blocks is in a transparent state, the first cholesteric liquid crystal layer 15 corresponding to the first non-color blocks is in a planar texture state, and the second cholesteric liquid crystal layer 25 corresponding to the third color blocks and the fourth color blocks is in a transparent state, and the second cholesteric liquid crystal layer 25 corresponding to the second non-color blocks is in a planar texture state.
Fig. 2 is a schematic cross-sectional view showing another state of the dual-sided reflective display panel of this embodiment, specifically, the first cholesteric liquid crystal layer 15 corresponding to the first color blocks and the second color blocks presents a focal conic state, the first cholesteric liquid crystal layer 15 corresponding to the first non-color block regions presents a planar texture state, and the second cholesteric liquid crystal layer 25 corresponding to the third color blocks and the fourth color blocks presents a focal conic state, and the second cholesteric liquid crystal layer 25 corresponding to the second non-color block regions presents a planar texture state.
As shown in fig. 1 and 2, when the first dimming liquid crystal cell 1 performs image display (i.e., the upper side of the double-sided reflective display panel performs image display), after the incident light (ambient light) corresponding to the plurality of first color blocks passes through the first color blocking layer 16, other colors except green light are absorbed, the green light sequentially passes through the first cholesteric liquid crystal layer 15 and the first transflective layer 2, and when the green light passes through the first transflective layer 2, the light with the polarization direction of 90 ° is reflected by the first transflective layer 2, and the light with the polarization direction of 0 ° passes through the first transflective layer 2 and then reaches the second transflective layer 3 and is reflected by the second transflective layer 3, so that the light with the polarization directions of 0 ° and 90 ° can be reflected and utilized, and the plurality of first color block regions display green; after the incident light (ambient light) corresponding to the plurality of second color blocks passes through the first color blocking layer 16, other colors are absorbed except blue light, after the blue light sequentially passes through the first cholesteric liquid crystal layer 15 and the first transflective layer 2, when the blue light passes through the first transflective layer 2, the light with the polarization direction of 90 degrees is reflected by the first transflective layer 2, the light with the polarization direction of 0 degrees passes through the first transflective layer 2 and then reaches the second transflective layer 3 to be reflected by the second layer 3, so that the light with the polarization directions of 0 degrees and 90 degrees can be reflected and utilized, thereby the plurality of second color blocking areas display blue color, the incident light (ambient light) corresponding to the plurality of first non-color blocking areas sequentially passes through the first color blocking layer 16 and the first cholesteric liquid crystal layer 15, the incident light is absorbed by the first dye liquid crystal, the red light reflected by the first cholesteric liquid crystal is reflected by the plurality of first non-color blocking areas, the plurality of first non-color blocking areas display red color colors after the plurality of first non-color blocking areas display red color colors, eventually causing the color of the first dimming liquid crystal cell 1 to display white.
Similarly, as shown in fig. 1 and 2, when the second dimming liquid crystal box 4 displays a picture (i.e., the upper side of the double-sided reflective display panel displays a picture), in the second dimming liquid crystal box 4, the second cholesteric liquid crystal layer 25 corresponding to the plurality of third color blocks and the plurality of fourth color blocks presents a transparent state (refer to fig. 1) or a focal conic state (refer to fig. 2), when incident light (ambient light) corresponding to the plurality of third color blocks passes through the second color block layer 26, other colors except green light are absorbed, the green light sequentially passes through the second cholesteric liquid crystal layer 25 and the second transflective layer 3, and then, when passing through the second reflective layer 3, light with a polarization direction of 0 ° is reflected by the second transflective layer 3, and then reaches the first reflective layer 2 after passing through the second reflective layer 3, so that the light with a polarization direction of 90 ° can be reflected by the first transmissive reflective layer 2, so that the incident light (ambient light) corresponding to the plurality of third color blocks can be reflected by the first reflective layer 2, and the second reflective layer 26 with a polarization direction of 0 ° can be reflected by the first reflective layer 2, and the second reflective layer 2 after passing through the second reflective layer 26 in turn, so that the other colors can be absorbed by the blue light with a polarization direction of 0 ° after passing through the second reflective layer 2, and the second reflective layer 2 can be sequentially reflected by the second reflective layer 2, so that the light with a polarization direction of 0 ° and the other colors can be reflected by the second reflective layer 2 After the second cholesteric liquid crystal layer 25, the incident light is absorbed by the second dye liquid crystal, and the red light reflected by the second cholesteric liquid crystal is reflected by the plurality of second colorless resistive regions, and the plurality of second colorless resistive regions display red. After the three colors are toned, the color of the second dimming liquid crystal cell 4 is finally made to display white.
Example III
The present embodiment is different from the second embodiment in that the double-sided reflective display panel can realize double-sided or single-sided black display.
In an alternative embodiment, a first black matrix is disposed on the first pixel electrode corresponding to the first non-color-blocking region, the first black matrix being immediately adjacent to the first counter substrate 12, and/or a second black matrix is disposed on the second pixel electrode corresponding to the second non-color-blocking region, the second black matrix being immediately adjacent to the second counter substrate 22.
Fig. 3 is a schematic cross-sectional view showing a state of the double-sided reflective display panel of the present embodiment, specifically, the first cholesteric liquid crystal layer 15 corresponding to the first color blocks and the second color blocks presents a planar texture state, the first cholesteric liquid crystal layer 15 corresponding to the first non-color block regions presents a transparent state, and the second cholesteric liquid crystal layer 25 corresponding to the third color blocks and the fourth color blocks presents a planar texture state, and the first cholesteric liquid crystal layer 15 corresponding to the second non-color block regions presents a transparent state.
Fig. 4 is a schematic cross-sectional view showing another state of the dual reflective display panel of this embodiment, specifically, the first cholesteric liquid crystal layer 15 corresponding to the first color blocks and the second color blocks presents a planar texture state, the first cholesteric liquid crystal layer 15 corresponding to the first non-color block regions presents a focal conic state, and the second cholesteric liquid crystal layer 25 corresponding to the third color blocks and the fourth color blocks presents a planar texture state, and the first cholesteric liquid crystal layer 15 corresponding to the second non-color block regions presents a focal conic state. The state is steady state, long-time power supply is not needed, and the energy-saving mode with low power consumption is realized.
As shown in fig. 3 and 4, when the first light control liquid crystal cell 1 displays a screen (i.e., the upper side of the double-sided reflective display panel displays a screen), incident light (ambient light) corresponding to the plurality of first color blocks and the plurality of second color blocks sequentially passes through the first color block layer 16 and the first cholesteric liquid crystal layer 15, and then the first dye in the first color block layer 16 and the first cholesteric liquid crystal layer 15 absorbs all light, none of the areas corresponding to the plurality of first color blocks and the plurality of second color blocks reflect light, and incident light (ambient light) corresponding to the plurality of first color blocks sequentially passes through the first color block layer 16, the first cholesteric liquid crystal layer 15 and the first pixel electrode and then is absorbed by the first black substrate, so that the areas corresponding to the plurality of first color blocks do not reflect light. Eventually causing the color of the first dimming liquid crystal cell 1 to display black.
Similarly, as shown in fig. 3 and 4, when the second light control liquid crystal cell 4 displays a picture (i.e., the upper side of the double-sided reflective display panel displays a picture), the incident light (ambient light) corresponding to the plurality of third color blocks and the plurality of fourth color blocks sequentially passes through the second color block layer 26 and the second cholesteric liquid crystal layer 25, and then the second dye in the second color block layer 26 and the second cholesteric liquid crystal layer 25 absorbs all the light, and the incident light (ambient light) corresponding to the plurality of third color blocks and the plurality of fourth color blocks does not reflect light, and the incident light (ambient light) corresponding to the plurality of second colorless blocks sequentially passes through the second color block layer 26, the second cholesteric liquid crystal layer 25 and the second pixel electrode and then is absorbed by the second black substrate, so that the regions corresponding to the plurality of second colorless blocks do not reflect light. Eventually causing the color of the second dimming liquid crystal cell 4 to display black.
Example IV
The present embodiment is different from the first embodiment in that the first color resist layer 16 is not provided in the first light adjusting liquid crystal cell 1, and a specific color is displayed only by the first cholesteric liquid crystal layer 15 in the first light adjusting liquid crystal cell 1, and/or the second color resist layer 26 is not provided in the second light adjusting liquid crystal cell 4, and a specific color is displayed only by the second cholesteric liquid crystal layer 25 in the second light adjusting liquid crystal cell 4.
In an alternative embodiment, when the first cholesteric liquid crystal and the second cholesteric liquid crystal both present a planar texture state, the dual-sided reflective display panel performs image display, the first dimming liquid crystal cell 1 displays a first preset color reflected by the first cholesteric liquid crystal, where the first preset color may be red, green, blue, etc., and the second dimming liquid crystal cell 4 displays a second preset color reflected by the second cholesteric liquid crystal, where the second preset color may be red, green, blue, etc. Wherein the first preset color and the second preset color can be the same or different. In addition, when the first cholesteric liquid crystal and the second cholesteric liquid crystal both present a focal conic state or a transmissive state, the dual-sided reflective display panel presents a transparent state or a fog state.
The above list of detailed descriptions is only specific to practical embodiments of the present application, and they are not intended to limit the scope of the present application, and all equivalent embodiments or modifications that do not depart from the spirit of the present application should be included in the scope of the present application.
Claims (10)
1. The utility model provides a two-sided reflection display panel, its characterized in that, including the first liquid crystal box that adjusts luminance, first transparent reflection layer, second transparent reflection layer, the second liquid crystal box that adjusts luminance that sets gradually, wherein:
The first dimming liquid crystal box comprises a first substrate, a first opposite substrate arranged opposite to the first substrate, and a first cholesteric liquid crystal layer arranged between the first substrate and the first opposite substrate, wherein the first opposite substrate is closely adjacent to the first transflective layer, a first control electrode is arranged on the first substrate closely adjacent to the first cholesteric liquid crystal layer, a first color resistance layer is arranged on one side, close to the first control electrode, of the first substrate, and is used for selectively transmitting a first preset color, a second control electrode is arranged on the first opposite substrate closely adjacent to the first cholesteric liquid crystal layer, and the first cholesteric liquid crystal layer comprises first cholesteric liquid crystal and is used for transmitting or reflecting light;
The second dimming liquid crystal box comprises a second substrate, a second opposite substrate arranged opposite to the second substrate, and a second cholesteric liquid crystal layer arranged between the second substrate and the second opposite substrate, wherein the second opposite substrate is closely adjacent to the second transflective layer, a third control electrode is arranged on the second substrate closely adjacent to the second cholesteric liquid crystal layer, a second color resistance layer is arranged on one side, close to the third control electrode, of the second substrate, and is used for selectively transmitting a second preset color, a fourth control electrode is arranged on the second opposite substrate closely adjacent to the second cholesteric liquid crystal layer, the second cholesteric liquid crystal layer comprises second cholesteric liquid crystal, and the second dimming liquid crystal box is used for transmitting or reflecting light;
The first light transmitting and reflecting layer is provided with a first light transmitting axis and a first reflecting axis, the first light transmitting and reflecting layer can transmit light rays parallel to the first light transmitting axis and reflect light rays parallel to the first reflecting axis, the second light transmitting and reflecting layer is provided with a second light transmitting axis and a second reflecting axis, the second light transmitting and reflecting layer can transmit light rays parallel to the second light transmitting axis and reflect light rays parallel to the second reflecting axis, the first light transmitting axis and the second reflecting axis are parallel to each other, and the second light transmitting axis and the first reflecting axis are parallel to each other.
2. The dual sided reflective display panel of claim 1, wherein the first cholesteric liquid crystal has a transparent state, a focal conic state, and a planar texture state;
When the first cholesteric liquid crystal is in a planar texture state, the first cholesteric liquid crystal can reflect light with a specific color;
when the first cholesteric liquid crystal is in a transparent state, the first cholesteric liquid crystal has a transmission function for light;
When the first cholesteric liquid crystal is in a focal conic state, the first cholesteric liquid crystal can scatter light rays and increase the emergent angle of the light rays;
and/or, the second cholesteric liquid crystal has a transparent state, a focal conic state, and a planar texture state;
When the second cholesteric liquid crystal is in a planar texture state, the second cholesteric liquid crystal can reflect light with a specific color;
When the second cholesteric liquid crystal is in a transparent state, the second cholesteric liquid crystal has a transmission function for light;
When the second cholesteric liquid crystal is in a focal conic state, the second cholesteric liquid crystal can scatter light rays and increase the emergent angle of the light rays.
3. The dual sided reflective display panel of claim 2, wherein the dual sided display panel is provided with a plurality of pixel units arranged in an array,
The first color resistance layer comprises a plurality of first color resistance blocks, a plurality of second color resistance blocks and a plurality of first non-color resistance areas which are distributed in an array, the plurality of first color resistance blocks, the plurality of second color resistance blocks and the plurality of first non-color resistance areas are respectively positioned in a plurality of pixel units, the first color resistance blocks selectively transmit light rays of a first color, the second color resistance blocks selectively transmit light rays of a second color, the first non-color resistance areas transmit light rays of various colors, the areas of the first cholesteric liquid crystal layer corresponding to the first non-color resistance areas reflect light rays of a third color, the second control electrode comprises a plurality of first pixel electrodes which are distributed in an array, and the plurality of first pixel electrodes are positioned in the plurality of pixel units;
And/or the second color resistance layer comprises a plurality of third color resistance blocks, a plurality of fourth color resistance blocks and a plurality of second colorless resistance regions which are distributed in an array, the third color resistance blocks, the fourth color resistance blocks and the second colorless resistance regions are respectively positioned in a plurality of pixel units, the third color resistance blocks selectively transmit light rays of a first color, the fourth color resistance blocks selectively transmit light rays of a second color, the second colorless resistance regions transmit light rays of various colors, the regions of the second cholesteric liquid crystal layer corresponding to the second colorless resistance regions reflect light rays of the third color, and the fourth control electrode comprises a plurality of second pixel electrodes which are distributed in an array, and the second pixel electrodes are positioned in the pixel units.
4. The dual sided reflective display panel of claim 3, wherein any one of the first color light, the second color light, and the third color light is red light, another one of which is green light, and another one of which is blue light.
5. The double-sided reflective display panel according to claim 4, wherein when the cholesteric liquid crystal corresponding to the first color block and the second color block is in a transparent state or a focal conic state, the cholesteric liquid crystal corresponding to the first colorless block is in a planar texture state;
And/or when the cholesteric liquid crystal corresponding to the third color blocking blocks and the fourth color blocking blocks is in a transparent state or a focal conic state, the cholesteric liquid crystal corresponding to the second colorless blocking areas is in a planar texture state.
6. The dual sided reflective display panel of claim 4, wherein the first cholesteric liquid crystal layer comprises a first dye liquid crystal that is consistent with a color exhibited by the first cholesteric liquid crystal under a preset condition, and/or wherein the second cholesteric liquid crystal layer comprises a second dye liquid crystal that is consistent with a color exhibited by the second cholesteric liquid crystal under a preset condition.
7. The double-sided reflective display panel according to claim 6, wherein a first black substrate is disposed on the first pixel electrode corresponding to the first colorless resistive region, the first black substrate being adjacent to the first counter substrate;
And/or, a second black substrate is arranged on the second pixel electrode corresponding to the second non-color resistance region, and the second black substrate is adjacent to the second opposite substrate.
8. The double-sided reflective display panel according to claim 7, wherein when the cholesteric liquid crystal corresponding to the first color block and the second color block is in a planar texture state, the cholesteric liquid crystal corresponding to the first colorless block is in a transparent state or a focal conic state;
And/or when the cholesteric liquid crystal corresponding to the third color blocking blocks and the fourth color blocking blocks presents a plane texture state, the cholesteric liquid crystal corresponding to the second colorless blocking areas presents a transparent state or a focal conic state.
9. The dual sided reflective display panel of claim 1, wherein the first and second transflective layers are APF films or metal wire grid polarizers.
10. The dual sided reflective display panel of claim 1, wherein the first substrate, the first counter substrate, the second substrate, and the second counter substrate are each transparent glass or transparent plastic, and the first control electrode, the second control electrode, the third control electrode, and the fourth control electrode are each transparent conductive.
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| CN202411533427.8A CN119126448A (en) | 2024-10-30 | 2024-10-30 | Double-sided reflective display panel |
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| CN202411533427.8A CN119126448A (en) | 2024-10-30 | 2024-10-30 | Double-sided reflective display panel |
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| US20020167278A1 (en) * | 2001-05-11 | 2002-11-14 | Sunghoe Yoon | Reflective cholesteric liquid crystal display device and manufacturing method for the same |
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