Double-sided reflection display panel

Abstract

The invention provides a double-sided reflection display panel. The double-sided reflection display panel comprises a first dimming liquid crystal box, a first transflective layer, a second transflective layer and a second dimming liquid crystal box which are arranged in sequence. A first transflective layer and a second transflective layer are arranged between a first dimming liquid crystal box and a second dimming liquid crystal box, a first light transmitting shaft of the first transflective layer is parallel to a second light reflecting shaft of the second transflective layer, and a second light transmitting shaft of the second transflective layer is parallel to a first light reflecting shaft of the first transflective layer; when the double-sided reflection display panel is used for picture display, light with the polarization direction parallel to the first reflection axis can be reflected and utilized by the first transmission and reflection layer, light with the polarization direction parallel to the second reflection axis can be reflected and utilized by the second transmission and reflection layer, and therefore the utilization rate of ambient light is increased, and the display brightness and the display effect are improved.

Description

Technical Field

[0001] The present application relates to the technical field of display panels, and in particular to a double-sided reflective display panel. Background Art

[0002] Liquid Crystal Display (LCD) technology has a dominant position in the display market due to its outstanding performance and complete technical system. According to the different ways of using light sources, LCD technology is finely divided into three categories: transmission type, reflection type and transflective type (or semi-transparent and semi-reflective type). In particular, reflective and transflective liquid crystal display devices show unique advantages in outdoor applications. They can efficiently utilize ambient light and meet display needs by reflecting external light, which not only reduces the dependence on built-in light sources, but also enhances the visual clarity in outdoor environments, while achieving energy-saving effects.

[0003] However, the current mainstream reflective display panels in the market are mostly limited to single-sided display, which, to a certain extent, restricts their application potential in multiple fields. Especially in public spaces such as digital billboards, communication electronic equipment, cash register terminals, information window services, and exhibition venues, display devices are often required to transmit information in two directions at the same time to meet the viewing needs of audiences in different locations. Taking exhibition venues as an example, a display board with a double-sided display function can display content on both sides of the exhibition area at the same time, without the need for the audience to move or gather on one side, which significantly improves the rate of information dissemination and the audience's exhibition experience. Summary of the invention

[0004] The present application provides a double-sided reflective display panel, which can improve the utilization rate of ambient light to enhance display brightness and display effect, and can also reduce power consumption and save energy.

[0005] To achieve the above-mentioned object, the present application provides a double-sided reflective display panel, comprising a first dimming liquid crystal box, a first transflective layer, a second transflective layer, and a second dimming liquid crystal box arranged in sequence, wherein:

[0006] The first dimming liquid crystal box comprises a first substrate, a first opposing substrate arranged opposite to the first substrate, and a first cholesteric liquid crystal layer arranged between the first substrate and the first opposing substrate, the first opposing substrate is adjacent to the first transflective layer, a first control electrode is arranged on the first substrate adjacent to the first cholesteric liquid crystal layer, a first color resist layer is arranged on one side of the first substrate close to the first control electrode, the first color resist layer is used for selectively transmitting a first preset color, a second control electrode is arranged on the first opposing substrate adjacent to the first cholesteric liquid crystal layer, and the first cholesteric liquid crystal layer comprises a first cholesteric liquid crystal for transmitting or reflecting light;

[0007] The second dimming liquid crystal box comprises a second base substrate, a second opposing base substrate arranged opposite to the second base substrate, and a second cholesteric liquid crystal layer arranged between the second base substrate and the second opposing base substrate, the second opposing base substrate is adjacent to the second transflective layer, a third control electrode is arranged on the second base substrate adjacent to the second cholesteric liquid crystal layer, a second color resist layer is arranged on one side of the second base substrate close to the third control electrode, the second color resist layer is used for selectively transmitting a second preset color, a fourth control electrode is arranged on the second opposing base substrate adjacent to the second cholesteric liquid crystal layer, the second cholesteric liquid crystal layer comprises a second cholesteric liquid crystal, and the second dimming liquid crystal box is used for transmitting or reflecting light;

[0008] The first reflective layer has a first light transmission axis and a first light reflection axis, and the first reflective layer can transmit light parallel to the first light transmission axis and reflect light parallel to the first light reflection axis; the second reflective layer has a second light transmission axis and a second light reflection axis, and the second reflective layer can transmit light parallel to the second light transmission axis and reflect 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.

[0009] 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;

[0010] When the first cholesteric liquid crystal is in a planar texture state, the first cholesteric liquid crystal can reflect light of a specific color;

[0011] When the first cholesteric liquid crystal is in a transparent state, the first cholesteric liquid crystal has a light transmission function;

[0012] When the first cholesteric liquid crystal is in a focal conic state, the first cholesteric liquid crystal can disperse the light and increase the emission angle of the light;

[0013] And / or, the second cholesteric liquid crystal has a transparent state, a focal conic state and a planar texture state;

[0014] When the second cholesteric liquid crystal is in a planar texture state, the second cholesteric liquid crystal can reflect light of a specific color;

[0015] When the second cholesteric liquid crystal is in a transparent state, the second cholesteric liquid crystal has a light transmission function;

[0016] When the second cholesteric liquid crystal is in a focal conic state, the second cholesteric liquid crystal can disperse the light and increase the emission angle of the light.

[0017] As a further improvement of the present application, the double-sided display panel is provided with a plurality of pixel units arranged in an array.

[0018] 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 colorless-resistance regions which are arranged in an array distribution, the plurality of first color-resistance blocks, the plurality of second color-resistance blocks, and the plurality of first colorless-resistance regions are respectively located in the plurality of pixel units, the first color-resistance blocks selectively transmit light of a first color, the second color-resistance blocks selectively transmit light of a second color, the first colorless-resistance regions transmit light of various colors, and the region of the first cholesteric liquid crystal layer corresponding to the first colorless-resistance regions reflects light of a third color, the second control electrode comprises a plurality of first pixel electrodes which are arranged in an array distribution, and the plurality of first pixel electrodes are located in the plurality of pixel units;

[0019] And / or, the second color resist layer includes a plurality of third color resist blocks, a plurality of fourth color resist blocks, and a plurality of second colorless resist areas which are arranged in an array distribution; the plurality of third color resist blocks, the plurality of fourth color resist blocks, and the plurality of second colorless resist areas are respectively located in the plurality of pixel units; the third color resist blocks selectively transmit light of the first color; the fourth color resist blocks selectively transmit light of the second color; the second colorless resist areas transmit light of various colors; an area of ​​the second cholesteric liquid crystal layer corresponding to the second colorless resist area reflects light of the third color; the fourth control electrode includes a plurality of second pixel electrodes which are arranged in an array distribution; and the plurality of second pixel electrodes are located in the plurality of pixel units.

[0020] 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 them is green light, and another one of them is blue light.

[0021] As a further improvement of the present application, when the cholesteric liquid crystals corresponding to the plurality of first color-block blocks and the plurality of second color-block blocks present a transparent state or a focal conic state, the cholesteric liquid crystals corresponding to the plurality of first colorless block regions present a planar texture state;

[0022] And / or, when the cholesteric liquid crystals corresponding to the plurality of third color blocks and the plurality of fourth color blocks are in a transparent state or a focal conic state, the cholesteric liquid crystals corresponding to the plurality of second colorless block regions are in a planar texture state.

[0023] As a further improvement of the present application, the first cholesteric liquid crystal layer includes a first dye liquid crystal, and the color presented by the first dye liquid crystal is consistent with that presented by the first cholesteric liquid crystal under preset conditions; and / or, the second cholesteric liquid crystal layer includes a second dye liquid crystal, and the color presented by the second dye liquid crystal is consistent with that presented by the second cholesteric liquid crystal under preset conditions.

[0024] As a further improvement of the present application, a first black substrate is disposed on the first pixel electrode corresponding to the first colorless resist area, and the first black substrate is adjacent to the first opposing substrate;

[0025] And / or, a second black substrate is disposed on the second pixel electrode corresponding to the second colorless filter area, and the second black substrate is adjacent to the second opposing substrate.

[0026] As a further improvement of the present application, when the cholesteric liquid crystals corresponding to the plurality of first color-block blocks and the plurality of second color-block blocks present a planar texture state, the cholesteric liquid crystals corresponding to the plurality of first colorless block regions present a transparent state or a focal conic state;

[0027] And / or, when the cholesteric liquid crystals corresponding to the plurality of third color blocks and the plurality of fourth color blocks present a planar texture state, the cholesteric liquid crystals corresponding to the plurality of second colorless block regions present a transparent state or a focal conic state.

[0028] As a further improvement of the present application, the first reflective transmissive layer and the second reflective transmissive layer are both APF films or metal wire grid polarizers.

[0029] As a further improvement of the present application, the first base substrate, the first opposing base substrate, the second base substrate, and the second opposing base substrate are respectively made of transparent glass or transparent plastic materials, 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.

[0030] The beneficial effects of the present application are as follows: the double-sided reflective display panel provided by the present invention, by setting the first reflective layer and the second reflective layer between the first dimming liquid crystal box and the second dimming liquid crystal box, because the first light transmission axis of the first reflective layer and the second light reflection axis of the second reflective layer are parallel to each other, and the second light transmission axis of the second reflective layer and the first light reflection axis of the first reflective layer are parallel to each other; when the double-sided reflective display panel is displaying a picture, the light whose polarization direction is parallel to the first light reflection axis can be reflected and utilized by the first reflective layer, and the light whose polarization direction is parallel to the second light reflection axis can be reflected and utilized by the second reflective layer, thereby improving the utilization rate of ambient light, and improving the display brightness and display effect. In addition, the first dimming liquid crystal box and the second dimming liquid crystal box respectively have the first cholesteric liquid crystal and the second cholesteric liquid crystal, and the cholesteric liquid crystal can be switched between different states to reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a cross-sectional schematic diagram of a double-sided reflective display panel in one state according to an embodiment of the present invention;

[0032] Figure 2 is a cross-sectional schematic diagram of another state of the double-sided reflective display panel according to an embodiment of the present invention;

[0033] Figure 3 is a cross-sectional schematic diagram of another state of the double-sided reflective display panel according to an embodiment of the present invention;

[0034] Figure 4 FIG. 4 is a cross-sectional schematic diagram of another state of the double-sided reflective display panel according to an embodiment of the present invention.

[0035] In the figure: 1, first dimming liquid crystal box; 2, first transflective layer; 3, second transflective layer; 4, second dimming liquid crystal box; 11, first base substrate; 12, first opposing base substrate; 13, first control electrode; 14, second control electrode; 15, first cholesteric liquid crystal layer; 16, first color resist layer; 21, second base substrate; 22, second opposing base substrate; 23, third control electrode; 24, fourth control electrode; 25, second cholesteric liquid crystal layer; 26, second color resist layer. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular sequence or order.

[0038] The directional words such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the specification and claims of the present invention are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional words should not limit the scope of protection claimed in this application.

[0039] Embodiment 1

[0040] Figure 1 FIG. 4 is a cross-sectional schematic diagram of a state of a double-sided reflective display panel according to an embodiment of the present invention; Figure 1 As shown, this embodiment provides a double-sided reflective display panel, which uses 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, which are arranged in sequence, wherein:

[0041] The first dimming liquid crystal box 1 comprises a first base substrate 11, a first opposing base substrate 12 arranged opposite to the first base substrate 11, and a first cholesteric liquid crystal layer 15 arranged between the first base substrate 11 and the first opposing base substrate 12. The first opposing base substrate 12 is adjacent to the first transflective layer 2. A first control electrode 13 is provided on the first base substrate 11 adjacent to the first cholesteric liquid crystal layer 15. A first color resist layer 16 is provided on one side of the first base substrate 11 close to the first control electrode 13. The first color resist layer 16 is used for selectively transmitting a first preset color. A second control electrode 14 is provided on the first opposing base substrate 12 adjacent to the first cholesteric liquid crystal layer 15. The first cholesteric liquid crystal layer 15 comprises a first cholesteric liquid crystal for transmitting or reflecting light.

[0042] The second dimming liquid crystal box 4 includes a second base substrate 21, a second opposing base substrate 22 arranged opposite to the second base substrate 21, and a second cholesteric liquid crystal layer 25 arranged between the second base substrate 21 and the second opposing base substrate 22. The second opposing base substrate 22 is adjacent to the second transflective layer 3. A third control electrode 23 is provided on the second base substrate 21 adjacent to the second cholesteric liquid crystal layer 25. A second color resist layer 26 is provided on one side of the second base substrate 21 close to the third control electrode 23. The second color resist layer 26 is used for selectively transmitting a second preset color. A fourth control electrode 24 is provided on the second opposing base substrate 22 adjacent to the second cholesteric liquid crystal layer 25. The second cholesteric liquid crystal layer 25 includes a second cholesteric liquid crystal. The second dimming liquid crystal box 4 is used for transmitting or reflecting light.

[0043] The first reflective layer 2 and the second reflective layer 3 can both transmit light of a specific polarization direction and reflect light of a specific polarization direction. The first reflective layer 2 has a first light transmission axis and a first light reflection axis, and can transmit light parallel to the first light transmission axis and reflect light parallel to the first light reflection axis; the second reflective layer 3 has a second light transmission axis and a second light reflection axis, and can transmit light parallel to the second light transmission axis and reflect 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.

[0044] Specifically, the working principle of the double-sided reflective display panel is as follows: the first transflective layer 2 and the second transflective layer 3 are both APF (Advance Polarizer Film) films, that is, reflective polarized ultra-thin optical films, the first light transmission axis of the first transflective layer 2 is 0°, and the first light reflection axis is 90°, the second light transmission axis of the second transflective layer 3 is 90°, and the second light reflection axis is 0° (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 can also be other angles, as long as 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).

[0045] When the first dimming liquid crystal box 1 is displaying a picture (i.e., the upper side of the double-sided reflective display panel is displaying a picture), the first cholesteric liquid crystal layer 15 in the first dimming liquid crystal box 1 is in a transparent state, a focal conic state or a planar textured state, and the incident light (ambient light) passes through the first color resist layer 16, the first cholesteric liquid crystal layer 15, and the first transflective layer 2 in sequence. When passing through the first transflective layer 2, the light with a polarization direction of 90° is reflected by the first transflective layer 2, and the light with a polarization direction of 0° passes through the first transflective layer 2 and reaches the second transflective layer 3 and is reflected by the second transflective layer 3, so that the light with polarization directions of 0° and 90° can both be reflected and utilized, thereby improving the utilization rate of ambient light, and enhancing the display brightness and display effect.

[0046] Similarly, when the second dimming liquid crystal box 4 is displaying a picture (i.e., the lower side of the double-sided reflective display panel is displaying a picture), the second cholesteric liquid crystal layer 25 in the second dimming liquid crystal box 4 is in a transparent state, a focal conic state, or a planar texture state. After the incident light (ambient light) passes through the second color resist layer 26, the second cholesteric liquid crystal layer 25, and the second transflective layer 3 in sequence, when passing through the second transflective layer 3, the light with a polarization direction of 0° is reflected by the second transflective layer 3, and the light with a polarization direction of 90° passes through the second transflective layer 3 and reaches the first transflective layer 2 and is reflected by the first transflective layer 2, so that the light with polarization directions of 0° and 90° can be reflected and utilized, thereby improving the utilization rate of ambient light, and enhancing the display brightness and display effect. Of course, in other embodiments, the first transflective layer 2 and the second transflective layer 3 can also be metal wire grid polarizers.

[0047] In an optional embodiment, the first cholesteric liquid crystal has a transparent state, a focal conic state and a planar texture state, and can switch between the three states. When the first cholesteric liquid crystal is in a focal conic state (i.e., the FC focal conic state), the first cholesteric liquid crystal can break up the light (scatter the light), increase the light emission angle, and thus increase the viewing angle range (it should be noted that, for the first dimming liquid crystal box 1, the light reflected by the first transflective layer 2 and the second transflective layer 3 can be scattered by the first cholesteric liquid crystal layer 15, and for the second dimming liquid crystal box 4, the light reflected by the first transflective layer 2 and the second transflective layer 3 can be scattered by the second cholesteric liquid crystal layer 25). When the first cholesteric liquid crystal is in a transparent state (i.e., the H field nematic state), it has a transmission function for light (it cannot scatter the light at this time), that is, the light can directly pass through the first cholesteric liquid crystal layer 15 at this time. When the first cholesteric liquid crystal is in a planar texture state (ie, 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.

[0048] Similarly, the second cholesteric liquid crystal also has a transparent state, a focal conic state and a planar texture state, and can switch between the three states. When the second cholesteric liquid crystal is in a focal conic state (i.e., the FC focal conic state), the second cholesteric liquid crystal can break up the light (scatter the light), increase the light emission angle, and thus increase the viewing angle range. When the second cholesteric liquid crystal is in a transparent state (i.e., the H field nematic state), it has a transmission function for light (it cannot scatter the light at this time), that is, the light can directly pass through the second cholesteric liquid crystal layer 25 at this time. When the second cholesteric liquid crystal is in a planar texture state (i.e., the P state), the second cholesteric liquid crystal can reflect light of a specific color, that is, the second dimming liquid crystal box 4 can achieve the function of reflecting light of a specific color. In addition, the FC focal conic state is a steady state and does not require long-term power supply. When the first cholesteric liquid crystal and / or the second cholesteric liquid crystal is in a focal conic state, the double-sided display panel is in a low power consumption energy-saving mode.

[0049] Specifically, in this embodiment, when the first cholesteric liquid crystal and the second cholesteric liquid crystal both present a focal conic state, a transmission state or a planar texture state, the double-sided reflective display panel displays a picture, the first dimming liquid crystal box 1 displays the first preset color selected by the first color resist layer 16 to transmit, and the second dimming liquid crystal box 4 displays the second preset color selected by the second color resist layer 26 to transmit. The difference is that in the three states, the brightness and angle of the picture displayed by the double-sided reflective display panel are inconsistent. The first preset color and the second preset color can be consistent or inconsistent. In this embodiment, the first color resist layer 16 can absorb colors other than red light, and the second color resist layer 26 can absorb colors other than red light. Therefore, the first dimming liquid crystal box 1 displays red, the second dimming liquid crystal box 4 displays red, and the double-sided reflective display panel can display a single red color display. In other embodiments, by replacing different color resist layers, the dimming liquid crystal box can also display light of other colors, such as blue light, green light, etc.

[0050] In an optional embodiment, the first base substrate 11, the first opposing base substrate 12, the second base substrate 21, and the second opposing base substrate 22 may be made of transparent glass, transparent plastic, etc. 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.

[0051] An embodiment of the present invention further provides a display device, comprising the above-mentioned double-sided reflective display panel.

[0052] The double-sided reflective display panel provided by the embodiment of the present invention is provided with a first transflective layer 2 and a second transflective layer 3 between a first dimming liquid crystal cell 1 and a second dimming liquid crystal cell 4. Since 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, and the second light transmission axis of the second transflective layer 3 and the first light reflection axis of the first transflective layer 2 are parallel to each other, when the double-sided reflective display panel is displaying a picture, the light whose polarization direction is parallel to the first light reflection axis can be reflected and utilized by the first transflective layer 2, and the light whose polarization direction is parallel to the second light reflection axis can be reflected and utilized by the second transflective layer 3 (whether it is single-sided display or double-sided display, the first transflective layer 2 and the second transflective layer 3 can be used to reflect the light), thereby improving the utilization rate of ambient light and enhancing the display brightness and display effect.

[0053] Embodiment 2

[0054] Continue to refer Figure 1 The double-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, and a plurality of first colorless resist areas arranged in an array distribution, the plurality of first color resist blocks, the plurality of second color resist blocks, and the plurality of first colorless resist areas are respectively located in the plurality of pixel units, the first color resist blocks selectively transmit light of a first color, the second color resist blocks selectively transmit light of a second color, the first colorless resist area transmits light of various colors, and the region of the first cholesteric liquid crystal layer 15 corresponding to the first colorless resist area reflects light of a third color, the second control electrode 14 includes a plurality of first pixel electrodes arranged in an array distribution, the plurality of first pixel electrodes are located in a plurality of pixel units, and the plurality of first pixel electrodes are located in a plurality of pixel units. In a plurality of pixel units; and / or, the second color-resistance layer 26 includes a plurality of third color-resistance blocks, a plurality of fourth color-resistance blocks, and a plurality of second colorless-resistance areas arranged in an array distribution, the plurality of third color-resistance blocks, the plurality of fourth color-resistance blocks, and the plurality of second colorless-resistance areas are respectively located in a plurality of pixel units, the third color-resistance blocks selectively transmit light of the first color, the fourth color-resistance blocks selectively transmit light of the second color, the second colorless-resistance areas transmit light of various colors, the area of ​​the second cholesteric liquid crystal layer 25 corresponding to the second colorless-resistance areas reflects light of the third color, the fourth control electrode 24 includes a plurality of second pixel electrodes arranged in an array distribution, and the plurality of second pixel electrodes are located in a plurality of pixel units. The double-sided display panel is provided with a plurality of pixel units arranged in an array, and the cholesteric liquid crystals in the plurality of pixel units are controlled separately.

[0055] In an optional embodiment, 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 them is green light, and another one of them is blue light.

[0056] In an optional embodiment, the first cholesteric liquid crystal layer 15 includes a first dye liquid crystal, and the first dye liquid crystal and the first cholesteric liquid crystal present a color consistent under preset conditions; and / or, the second cholesteric liquid crystal layer 25 includes a second dye liquid crystal, and the second dye liquid crystal and the second cholesteric liquid crystal present a color consistent under preset conditions. For example, the first cholesteric liquid crystal reflects red when in a planar texture state, and at this time, the first dye liquid crystal absorbs other light except red, and / or, the second cholesteric liquid crystal reflects red when in a planar texture state, and at this time, the second dye liquid crystal absorbs other light except red.

[0057] Specifically in this embodiment, the first cholesteric liquid crystal and the second cholesteric liquid crystal can both reflect red light, the first dye liquid crystal and the second dye liquid crystal can both absorb light other than red, the first color block and the third color block can absorb colors other than green light, that is, selectively transmit green light, the second color block and the fourth color block can absorb colors other than blue light, that is, selectively transmit blue light. In other embodiments, the first cholesteric liquid crystal and the second cholesteric liquid crystal can also display light of other colors, such as blue light, green light, etc., and the first color block, the second color block, the third color block, and the fourth color block can also selectively transmit light of other colors, such as red light, etc.

[0058] Specifically, the working principle of the double-sided reflective display panel is as follows: the first transflective layer 2 and the second transflective layer 3 are both APF (Advance Polarizer Film) films, and the working principle thereof is referred to the above discussion and will not be described in detail here.

[0059] Figure 1 A cross-sectional schematic diagram of one state of the double-sided reflective display panel of this embodiment is shown, specifically: the first cholesteric liquid crystal layer 15 corresponding to the multiple first color block blocks and the multiple second color block blocks is in a transparent state, and the first cholesteric liquid crystal layer 15 corresponding to the multiple first colorless block blocks is in a planar texture state. At the same time, the second cholesteric liquid crystal layer 25 corresponding to the multiple third color block blocks and the multiple fourth color block blocks is in a transparent state, and the second cholesteric liquid crystal layer 25 corresponding to the multiple second colorless block blocks is in a planar texture state.

[0060] Figure 2 The cross-sectional schematic diagram showing another state of the double-sided reflective display panel of the present embodiment is as follows: the first cholesteric liquid crystal layer 15 corresponding to the plurality of first color blocks and the plurality of second color blocks presents a focal conic state, and the first cholesteric liquid crystal layer 15 corresponding to the plurality of first colorless resistance areas presents a planar texture state; at the same time, the second cholesteric liquid crystal layer 25 corresponding to the plurality of third color blocks and the plurality of fourth color blocks presents a focal conic state, and the second cholesteric liquid crystal layer 25 corresponding to the plurality of second colorless resistance areas presents a planar texture state.

[0061] like Figure 1 and Figure 2 As shown, when the first dimming liquid crystal box 1 is displaying a picture (i.e., the upper side of the double-sided reflective display panel is displaying a picture): after the incident light (ambient light) corresponding to the plurality of first color blocks passes through the first color block layer 16, except for the green light, all other colors are absorbed, and the green light passes through the first cholesteric liquid crystal layer 15 and the first transflective layer 2 in sequence. When passing through the first transflective layer 2, the light with a polarization direction of 90° is reflected by the first transflective layer 2, and the light with a polarization direction of 0° passes through the first transflective layer 2 and reaches the second transflective layer 3 and is reflected by the second transflective layer 3, so that the light with polarization directions of 0° and 90° can be reflected and utilized, so that the plurality of first color block areas display green; the incident light (ambient light) corresponding to the plurality of second color blocks passes through the first color block layer 16. After that, except for the blue light, all other colors are absorbed. After the blue light passes through the first cholesteric liquid crystal layer 15 and the first transflective layer 2 in sequence, when passing through the first transflective layer 2, the light with a polarization direction of 90° is reflected by the first transflective layer 2, and the light with a polarization direction of 0° passes through the first transflective layer 2 and reaches the second transflective layer 3 and is reflected by the second transflective layer 3, so that the light with polarization directions of 0° and 90° can be reflected and utilized, so that the multiple second color block areas display blue; after the incident light (ambient light) corresponding to the multiple first colorless block areas passes through the first color block layer 16 and the first cholesteric liquid crystal layer 15 in sequence, the incident light is absorbed by the first dye liquid crystal, and the red light reflected by the first cholesteric liquid crystal is reflected by the multiple first colorless block areas, and the multiple first colorless block areas display red. After the three-color coloring, the color of the first dimming liquid crystal box 1 is finally made to display white.

[0062] Similarly, if Figure 1 and Figure 2 As shown, when the second dimming liquid crystal cell 4 is displaying a picture (i.e., the upper side of the double-sided reflective display panel is displaying a picture), the second cholesteric liquid crystal layer 25 corresponding to the plurality of third color blocks and the plurality of fourth color blocks in the second dimming liquid crystal cell 4 is in a transparent state (refer to Figure 1 ) or focal conic state (reference Figure 2): after the incident light (ambient light) corresponding to the plurality of third color blocks passes through the second color block layer 26, except for the green light, all other colors are absorbed. After the green light passes through the second cholesteric liquid crystal layer 25 and the second transflective layer 3 in sequence, when passing through the second reflective layer, the light with a polarization direction of 0° is reflected by the second transflective layer 3, and the light with a polarization direction of 90° passes through the second transflective layer 3 and reaches the first transflective layer 2 and is reflected by the first transflective layer 2, so that the light with polarization directions of 0° and 90° can be reflected and utilized, so that the plurality of third color block areas display green; after the incident light (ambient light) corresponding to the plurality of fourth color blocks passes through the second color block layer 26, except for the blue light, all other colors are absorbed. The blue light After the colored light passes through the second cholesteric liquid crystal layer 25 and the second transflective layer 3 in sequence, when passing through the second transflective layer 3, the light with a polarization direction of 0° is reflected by the second transflective layer 3, and the light with a polarization direction of 90° passes through the second transflective layer 3 and reaches the first transflective layer 2 and is reflected by the first transflective layer 2, so that the light with polarization directions of 0° and 90° can be reflected and utilized, so that the multiple fourth color block areas display blue; after the incident light (ambient light) corresponding to the multiple second colorless block areas passes through the second color block layer 26 and the second cholesteric liquid crystal layer 25 in sequence, 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 multiple second colorless block areas, and the multiple second colorless block areas display red. After the three-color coloring, the color of the second dimming liquid crystal box 4 is finally displayed in white.

[0063] Embodiment 3

[0064] The difference between this embodiment and the second embodiment is that the double-sided reflective display panel can realize double-sided or single-sided black display.

[0065] In an optional embodiment, a first black substrate is disposed on the first pixel electrode corresponding to the first colorless resist area, and the first black substrate is adjacent to the first opposing substrate substrate 12; and / or a second black substrate is disposed on the second pixel electrode corresponding to the second colorless resist area, and the second black substrate is adjacent to the second opposing substrate substrate 22.

[0066] Figure 3 A cross-sectional schematic diagram of one state of the double-sided reflective display panel of this embodiment is shown, specifically: the first cholesteric liquid crystal layer 15 corresponding to the multiple first color block blocks and the multiple second color block blocks presents a planar texture state, and the first cholesteric liquid crystal layer 15 corresponding to the multiple first colorless block blocks presents a transparent state. At the same time, the second cholesteric liquid crystal layer 25 corresponding to the multiple third color block blocks and the multiple fourth color block blocks presents a planar texture state, and the first cholesteric liquid crystal layer 15 corresponding to the multiple second colorless block blocks presents a transparent state.

[0067] Figure 4The cross-sectional schematic diagram showing another state of the double-sided reflective display panel of this embodiment is specifically: the first cholesteric liquid crystal layer 15 corresponding to the plurality of first color blocks and the plurality of second color blocks presents a planar texture state, and the first cholesteric liquid crystal layer 15 corresponding to the plurality of first colorless blocks presents a focal conic state, and at the same time, the second cholesteric liquid crystal layer 25 corresponding to the plurality of third color blocks and the plurality of fourth color blocks presents a planar texture state, and the first cholesteric liquid crystal layer 15 corresponding to the plurality of second colorless blocks presents a focal conic state. This state is a steady state, does not need to be powered for a long time, and is a low power consumption energy-saving mode.

[0068] like Figure 3 and Figure 4 As shown, when the first dimming liquid crystal box 1 is displaying a picture (i.e., the upper side of the double-sided reflective display panel is displaying a picture): after the incident light (ambient light) corresponding to the plurality of first color blocks and the plurality of second color blocks passes through the first color block layer 16 and the first cholesteric liquid crystal layer 15 in sequence, the first color block layer 16 and the first dye in the first cholesteric liquid crystal layer 15 absorb all the light, and the regions corresponding to the plurality of first color blocks and the plurality of second color blocks do not reflect light; after the incident light (ambient light) corresponding to the plurality of first colorless blocks passes through the first color block layer 16, the first cholesteric liquid crystal layer 15 and the first pixel electrode in sequence, it is absorbed by the first black substrate, and the regions corresponding to the plurality of first colorless blocks do not reflect light either. Finally, the color of the first dimming liquid crystal box 1 is displayed in black.

[0069] Similarly, if Figure 3 and Figure 4 As shown, when the second dimming liquid crystal box 4 is displaying a picture (i.e., the upper side of the double-sided reflective display panel is displaying a picture): after the incident light (ambient light) corresponding to the plurality of third color blocks and the plurality of fourth color blocks passes through the second color block layer 26 and the second cholesteric liquid crystal layer 25 in sequence, the second color block layer 26 and the second dye in the second cholesteric liquid crystal layer 25 absorb all the light, and the regions corresponding to the plurality of third color blocks and the plurality of fourth color blocks do not reflect light; after the incident light (ambient light) corresponding to the plurality of second colorless blocks passes through the second color block layer 26, the second cholesteric liquid crystal layer 25 and the second pixel electrode in sequence, it is absorbed by the second black substrate, so the regions corresponding to the plurality of second colorless blocks do not reflect light either. Finally, the color of the second dimming liquid crystal box 4 is displayed in black.

[0070] Embodiment 4

[0071] The difference between this embodiment and the first embodiment lies in that, in this embodiment, the first color resist layer 16 is not provided in the first dimming liquid crystal box 1, and a specific color is displayed only through the first cholesteric liquid crystal layer 15 in the first dimming liquid crystal box 1; and / or, the second color resist layer 26 is not provided in the second dimming liquid crystal box 4, and a specific color is displayed only through the second cholesteric liquid crystal layer 25 in the second dimming liquid crystal box 4.

[0072] In an optional embodiment, when both the first cholesteric liquid crystal and the second cholesteric liquid crystal are in a planar texture state, the double-sided reflective display panel displays a picture, the first dimming liquid crystal box 1 displays the first cholesteric liquid crystal reflecting a first preset color, the first preset color can be red, green, blue, etc., and the second dimming liquid crystal box 4 displays the second cholesteric liquid crystal reflecting a second preset color, the second preset color can be red, green, blue, etc. Wherein: the first preset color and the second preset color can be the same or different. In addition, when both the first cholesteric liquid crystal and the second cholesteric liquid crystal are in a focal conic state or a transmission state, the double-sided reflective display panel is in a transparent state or a foggy state.

[0073] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present application. They are not intended to limit the scope of protection of the present application. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A double-sided reflective display panel, characterized in that: The invention comprises a first dimming liquid crystal box, a first transflective layer, a second transflective layer, and a second dimming liquid crystal box which are arranged in sequence, wherein: The first dimming liquid crystal box comprises a first substrate, a first opposing substrate arranged opposite to the first substrate, and a first cholesteric liquid crystal layer arranged between the first substrate and the first opposing substrate, the first opposing substrate is adjacent to the first transflective layer, a first control electrode is arranged on the first substrate adjacent to the first cholesteric liquid crystal layer, a first color resist layer is arranged on one side of the first substrate close to the first control electrode, the first color resist layer is used for selectively transmitting a first preset color, a second control electrode is arranged on the first opposing substrate adjacent to the first cholesteric liquid crystal layer, and the first cholesteric liquid crystal layer comprises a first cholesteric liquid crystal for transmitting or reflecting light; The second dimming liquid crystal box comprises a second base substrate, a second opposing base substrate arranged opposite to the second base substrate, and a second cholesteric liquid crystal layer arranged between the second base substrate and the second opposing base substrate, the second opposing base substrate is adjacent to the second transflective layer, a third control electrode is arranged on the second base substrate adjacent to the second cholesteric liquid crystal layer, a second color resist layer is arranged on one side of the second base substrate close to the third control electrode, the second color resist layer is used for selectively transmitting a second preset color, a fourth control electrode is arranged on the second opposing base substrate adjacent to the second cholesteric liquid crystal layer, the second cholesteric liquid crystal layer comprises a second cholesteric liquid crystal, and the second dimming liquid crystal box is used for transmitting or reflecting light; The first reflective layer has a first light transmission axis and a first light reflection axis, and the first reflective layer can transmit light parallel to the first light transmission axis and reflect light parallel to the first light reflection axis; the second reflective layer has a second light transmission axis and a second light reflection axis, and the second reflective layer can transmit light parallel to the second light transmission axis and reflect 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.

2. The double-sided reflective display panel according to claim 1, characterized in that: 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 of a specific color; When the first cholesteric liquid crystal is in a transparent state, the first cholesteric liquid crystal has a light transmission function; When the first cholesteric liquid crystal is in a focal conic state, the first cholesteric liquid crystal can disperse the light and increase the emission angle of the light; 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 of a specific color; When the second cholesteric liquid crystal is in a transparent state, the second cholesteric liquid crystal has a light transmission function; When the second cholesteric liquid crystal is in a focal conic state, the second cholesteric liquid crystal can disperse the light and increase the emission angle of the light.

3. The double-sided reflective display panel according to claim 2, characterized in that: 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 colorless-resistance regions which are arranged in an array distribution, the plurality of first color-resistance blocks, the plurality of second color-resistance blocks, and the plurality of first colorless-resistance regions are respectively located in the plurality of pixel units, the first color-resistance blocks selectively transmit light of a first color, the second color-resistance blocks selectively transmit light of a second color, the first colorless-resistance regions transmit light of various colors, and the region of the first cholesteric liquid crystal layer corresponding to the first colorless-resistance regions reflects light of a third color, the second control electrode comprises a plurality of first pixel electrodes which are arranged in an array distribution, and the plurality of first pixel electrodes are located in the plurality of pixel units; And / or, the second color resist layer includes a plurality of third color resist blocks, a plurality of fourth color resist blocks, and a plurality of second colorless resist areas which are arranged in an array distribution; the plurality of third color resist blocks, the plurality of fourth color resist blocks, and the plurality of second colorless resist areas are respectively located in the plurality of pixel units; the third color resist blocks selectively transmit light of the first color; the fourth color resist blocks selectively transmit light of the second color; the second colorless resist areas transmit light of various colors; an area of ​​the second cholesteric liquid crystal layer corresponding to the second colorless resist area reflects light of the third color; the fourth control electrode includes a plurality of second pixel electrodes which are arranged in an array distribution; and the plurality of second pixel electrodes are located in the plurality of pixel units.

4. The double-sided reflective display panel according to claim 3, characterized in that: 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 them is green light, and another one of them is blue light.

5. The double-sided reflective display panel according to claim 4, characterized in that: When the cholesteric liquid crystals corresponding to the first color-block blocks and the second color-block blocks are in a transparent state or a focal conic state, the cholesteric liquid crystals corresponding to the first colorless block regions are in a planar texture state; And / or, when the cholesteric liquid crystals corresponding to the plurality of third color blocks and the plurality of fourth color blocks are in a transparent state or a focal conic state, the cholesteric liquid crystals corresponding to the plurality of second colorless block regions are in a planar texture state.

6. The double-sided reflective display panel according to claim 4, characterized in that: The first cholesteric liquid crystal layer includes a first dye liquid crystal, and the first dye liquid crystal and the first cholesteric liquid crystal present a consistent color under preset conditions; And / or, the second cholesteric liquid crystal layer includes a second dye liquid crystal, and the second dye liquid crystal and the second cholesteric liquid crystal present a consistent color under preset conditions.

7. The double-sided reflective display panel according to claim 6, characterized in that: Disposing a first black substrate on the first pixel electrode corresponding to the first colorless resist area, wherein the first black substrate is adjacent to the first opposing substrate; And / or, a second black substrate is disposed on the second pixel electrode corresponding to the second colorless filter area, and the second black substrate is adjacent to the second opposing substrate.

8. The double-sided reflective display panel according to claim 7, characterized in that: When the cholesteric liquid crystals corresponding to the plurality of first color-block blocks and the plurality of second color-block blocks present a planar texture state, the cholesteric liquid crystals corresponding to the plurality of first colorless block regions present a transparent state or a focal conic state; And / or, when the cholesteric liquid crystals corresponding to the plurality of third color blocks and the plurality of fourth color blocks present a planar texture state, the cholesteric liquid crystals corresponding to the plurality of second colorless block regions present a transparent state or a focal conic state.

9. The double-sided reflective display panel according to claim 1, characterized in that: The first reflective transmissive layer and the second reflective transmissive layer are both APF films or metal wire grid polarizers.

10. The double-sided reflective display panel according to claim 1, characterized in that: The first base substrate, the first opposing base substrate, the second base substrate and the second opposing base substrate are respectively made of transparent glass or transparent plastic materials, 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.

Images