CN220473826U - Reflective display screen - Google Patents
Reflective display screen Download PDFInfo
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- CN220473826U CN220473826U CN202322339282.5U CN202322339282U CN220473826U CN 220473826 U CN220473826 U CN 220473826U CN 202322339282 U CN202322339282 U CN 202322339282U CN 220473826 U CN220473826 U CN 220473826U
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Abstract
The utility model discloses a reflective display screen, including first display module assembly and second display module assembly, first display module assembly includes: the color film substrate and the array substrate are oppositely arranged, and the liquid crystal layer is positioned between the color film substrate and the array substrate; the color film substrate comprises a first substrate, a color resistance layer is arranged on one side, close to the liquid crystal layer, of the first substrate, the color resistance layer comprises a first color resistance region, a second color resistance region and a transparent region, the first color resistance region and the second color resistance region are arranged at intervals, the first color resistance region and the second color resistance region are respectively one of red color resistance, green color resistance and blue color resistance, and the colors of the first color resistance region and the second color resistance region are different; the second display module is a cholesteric liquid crystal display module, and the color of the light reflected by the second display module is consistent with the color of the rest one of red color resistor, green color resistor and blue color resistor. The reflective display screen provided by the utility model combines the cholesteric liquid crystal display module and the diffuse reflection display module, thereby improving the reflectivity and reducing the manufacturing process difficulty.
Description
Technical Field
The utility model relates to the technical field of liquid crystal display, in particular to a reflective display screen.
Background
The liquid crystal display device (liquid crystal display, LCD) has advantages of good image quality, small size, light weight, low driving voltage, low power consumption, no radiation, and relatively low manufacturing cost, and is dominant in the field of flat panel display.
Cholesteric liquid crystal bistable displays, which are reflective displays, use ambient light to display images without a backlight source. The bistable display technology of cholesteric liquid crystal features that it has two states of planar texture state (P state) and focal conic state (FC state) and can exist stably without external electric field. In the P-state, if the wavelength of the incident light matches the pitch, the light will be reflected, with the reflected light being circularly polarized light. In the FC state, the pitch distribution is disordered and light is scattered. Under the action of external electric field, the two states can be mutually switched, and the bistable state is realized. Since the two texture states used for display are stable in the absence of an external field, no external field is required to be applied for a long time to maintain the display state, and thus the cholesteric liquid crystal display has the characteristic of power saving.
For the bistable display technology of cholesteric liquid crystal, due to the requirement of liquid crystal pitch, the single-cell architecture can only perform single-color display or black-and-white display. If color display is desired, a three-layer cell architecture is required to reflect blue, green and red light, respectively, as shown in FIG. 1. But adopts a three-layer liquid crystal box structure, the whole display is thicker and has poor specification; in addition, as the three-layer liquid crystal box structure is adopted, pixels are required to be aligned one by one, so that the production process is complex and the cost is high.
Further, a metal diffuse reflection layer can be manufactured in the liquid crystal box, and one side of the color film substrate (CF substrate) contains RGB color resistances, so that a full-color display function is realized, as shown in fig. 2. Although the display panel with such a structure requires only one Liquid Crystal layer (Liquid Crystal), the display effect of the display panel is limited by the transmittance of the color resist material and the RGB aperture ratio, and the display effect is poor due to low reflectance.
Disclosure of Invention
In view of the foregoing, the present utility model is directed to a reflective display screen, which combines a cholesteric liquid crystal display module with a diffuse reflection display module, so as to improve reflectivity and reduce manufacturing process difficulty.
According to an aspect of the present utility model, there is provided a reflective display screen, comprising: the first display module and place in the second display module assembly of the below of first display module assembly, first display module assembly includes: the color film substrate and the array substrate are oppositely arranged, and the liquid crystal layer is positioned between the color film substrate and the array substrate;
the color film substrate comprises a first substrate, a color resistance layer is arranged on one side, close to the liquid crystal layer, of the first substrate, the color resistance layer comprises a first color resistance area, a second color resistance area and a transparent area, the first color resistance area and the second color resistance area are respectively one of red color resistance, green color resistance and blue color resistance, and the colors of the first color resistance area and the second color resistance area are different;
the array substrate comprises a second substrate opposite to the first substrate, an insulating layer and a second flat layer are sequentially covered on one side, close to the liquid crystal layer, of the second substrate, and a diffuse reflection layer and a second electrode layer are arranged on the second flat layer;
the second display module is a cholesteric liquid crystal display module, and the light reflected by the second display module has the same color as the rest one of the red color resistor, the green color resistor and the blue color resistor.
Preferably, black matrixes are respectively arranged among the first color resistance region, the second color resistance region and the transparent region, a first flat layer is covered on the color resistance layer, the first flat layer is filled in the transparent region, and a first electrode layer is arranged on the first flat layer.
Preferably, a convex structure is disposed on the second flat layer in the corresponding region of the first color resistance region and the second color resistance region, the diffuse reflection layer is covered on the convex structure, the second electrode layer is disposed on the second flat layer in the corresponding region of the transparent region, and the diffuse reflection layer and the second electrode layer are disposed in different regions of the second flat layer.
Preferably, the second display module comprises a third substrate, a fourth substrate and a cholesteric liquid crystal layer, wherein the third substrate and the fourth substrate are oppositely arranged, the cholesteric liquid crystal layer is arranged between the third substrate and the fourth substrate, a third electrode layer is arranged on one side, close to the cholesteric liquid crystal layer, of the third substrate, and a fourth electrode layer is arranged on one side, close to the cholesteric liquid crystal layer, of the fourth substrate.
Preferably, the color of the light passing through the first color resistance region and the second color resistance region is the color of the light reflected by the first display module; the light reflected by the second display module passes through the transparent area of the color resistance layer.
Preferably, the method further comprises:
the backlight module is positioned on one side of the second display module, which is far away from the first display module, and the backlight module is a solar backlight module.
Preferably, the method further comprises:
the third display module is positioned between the backlight module and the second display module, and the third display module and the second display module have the same structure and the same color of reflected light.
Preferably, the first display module is a diffuse reflection display module.
The reflective display screen combines the cholesteric liquid crystal display module and the diffuse reflection display module, adopts the diffuse reflection display module to reflect any two of red, green and blue three-color light, and adopts the cholesteric liquid crystal display module to reflect light of other colors of the red, green and blue three-color light, thereby improving the reflectivity and reducing the processing difficulty. The reflective display screen adopts the double-layer cholesteric liquid crystal display module to reflect light of the same color, so that the reflectivity of the color is improved, and the display effect is enhanced. The backlight module can be matched with solar energy, and the solar energy is adopted to absorb unreflected light energy and further convert the light energy into electric energy, so that the power consumption of the display screen is reduced.
Drawings
The above and other objects, features and advantages of the present utility model will become more apparent from the following description of embodiments of the present utility model with reference to the accompanying drawings, in which:
FIG. 1 shows a block diagram of a reflective display screen according to the prior art;
FIG. 2 shows a block diagram of a reflective display screen according to the prior art;
fig. 3 shows three states of cholesteric liquid crystal;
fig. 4 shows a block diagram of a reflective display screen according to a first embodiment of the present utility model;
FIG. 5 shows a block diagram of a reflective display screen according to a second embodiment of the utility model;
fig. 6 shows a block diagram of a reflective display screen according to a third embodiment of the present utility model.
Detailed Description
Various embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts. For clarity, the various features of the drawings are not drawn to scale.
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples.
Fig. 3 shows three states of cholesteric liquid crystal. Referring to fig. 3, the cholesteric liquid crystal can maintain a planar texture state (P-steady state) and a focal conic state (FC-steady state) in the absence of a voltage or an applied pulse voltage, in which if the wavelength of incident light matches the pitch, light will be reflected, and the reflected light is circularly polarized light. In the FC state, the pitch distribution is disordered and light is scattered. Under the action of external electric field, the two states can be mutually switched, and the bistable state is realized.
Fig. 4 shows a block diagram of a reflective display screen according to a first embodiment of the present utility model.
Referring to fig. 4, the reflective display 300 of the present application includes a first display module 310, a second display module 320, and a backlight module 330. The first display module 310 is, for example, a dye-liquid crystal diffuse reflection display module, and is configured to reflect any two of red, green and blue light; the second display module 320 is, for example, a cholesteric liquid crystal display module, and is configured to reflect other colors of light in red, green and blue. In this application, for convenience of description, the first display module 310 is for example used to reflect red and green light, and the second display module 320 is for example used to reflect blue light.
The first display module 310 includes a color film substrate, an array substrate, and a liquid crystal layer 315 disposed between the color film substrate and the array substrate. The color film substrate includes a first substrate 311, a color resist layer 312 covering the first substrate 311, a first flat layer 313 covering the color resist layer 312, and a first electrode layer 314 disposed on the first flat layer 313. The color blocking layer 312 includes a first color blocking area 3122, a second color blocking area 3123 and a transparent area 3124 that are disposed at intervals, wherein a black matrix 3121 is disposed between the first color blocking area 3122, the second color blocking area 3123 and the transparent area 3124, respectively, and the black matrix 3121 cannot allow light to pass through. The array substrate includes a second substrate 319 opposite to the first substrate 311, the second substrate 319 is provided with an insulating layer 318 in sequence towards the direction of the liquid crystal layer 315, the insulating layer 318 is covered with a second flat layer 317, the second flat layer 317 located in the corresponding areas of the first color blocking area 3122 and the second color blocking area 3123 is provided with a convex structure, the convex structure is covered with a diffuse reflection layer 3161, the second flat layer 317 located in the corresponding area of the transparent area 3124 is provided with a second electrode layer 3162, and the diffuse reflection layer 3161 and the second electrode layer 3162 are located in different areas of the same layer. In this embodiment, the first electrode layer 314, the diffuse reflection layer 3161, and the second electrode layer 3162 are positioned near both sides of the liquid crystal layer 315 to provide one potential reference platform of an electric field of liquid crystal molecule deflection of the liquid crystal layer 315. The first electrode layer 314 and the second electrode layer 3162 are ITO (Indium Tin Oxide).
The color resist layer 312 has a region for reflecting light, including red, green, and blue, and converts white light passing through the color resist layer 312 into red, green, and blue light. Referring to fig. 4, light is reflected from the first and second color blocking regions 3122 and 3123 to the first display module 310, so that the color of the color blocking of the first and second color blocking regions 3122 and 3123 determines the color of the light reflected by the first display module 310. The first color blocking area 3122 and the second color blocking area 3123 are respectively one of red color blocking, green color blocking and blue color blocking, and the first color blocking area 3122 and the second color blocking area 3123 are different in color, in this application, the first color blocking area 3122 is, for example, a red color blocking area, and the second color blocking area 3123 is, for example, a green color blocking area.
Further, the transparent region 3124 is, for example, used to provide a light reflection path of the second display module 320. In this embodiment, the transparent region 3124 is formed integrally with the first planarization layer 313, for example, and the transparent region 3124 is filled with the first planarization layer 313.
The second display module 320 is located at a side of the first display module 310, which is close to the backlight module, and the second display module 320 includes: the third substrate 321 and the fourth substrate 325 are disposed opposite to each other, and the cholesteric liquid crystal layer 323 is disposed between the third substrate 321 and the fourth substrate 325, wherein the third substrate 321 is provided with the third electrode layer 322 on a side close to the cholesteric liquid crystal layer 323, and the fourth substrate 325 is provided with the fourth electrode layer 324 on a side close to the cholesteric liquid crystal layer 323.
The color of the light reflected by the second display module 320 is consistent with the remaining one of the red, green and blue color resistances, and in this application, the cholesteric liquid crystal layer 323 of the second display module 320 is used for reflecting blue light, for example. Since the cholesteric liquid crystal layer 323 is located between the third electrode layer 322 and the fourth electrode layer 324, a certain voltage is applied to the third electrode layer 322 and the fourth electrode layer 324 so that the cholesteric liquid crystal layer 323 maintains the FC state and thus always reflects blue light.
In this embodiment, the light enters the reflective screen 300 from the first substrate 311 side of the first display module 310, enters the first display module 310 and the second display module 320 through the transparent region 3124 of the color-blocking layer 312, and after being reflected by the second display module 320, the reflected blue light passes through the second display module 320 and the first display module 310, and reaches the eyes of the user through the transparent region 3124 of the color-blocking layer 312 of the first display module 310.
The reflective display screen provided by the utility model combines the first display module (diffuse reflection display module) and the second display module (cholesteric liquid crystal display module), adopts the diffuse reflection display module to reflect any two colors of red, green and blue three-color light, and adopts the cholesteric liquid crystal display module to reflect other colors of red, green and blue three-color light, thereby improving the reflectivity and reducing the processing difficulty.
In addition, the second display module is of integral design, is attached to the first display module, always provides a blue wave band reflection light source, and has no alignment precision problem. The first display module is a dye liquid crystal box, is controlled to display R, G, B, has high response speed, and can improve the overall reflection efficiency by designing different opening ratios (5:5:3) in a color resistance region and a transparent region corresponding to the color resistance layer; the aperture ratio of the color resist region and the transparent region of the color resist layer can be further adjusted as required.
Further, fig. 5 shows a reflective display screen of a second embodiment of the present application. The reflective display of the second embodiment further comprises a third display module 340 compared to the reflective display of the first embodiment.
Referring to fig. 5, the reflective display 300 includes a first display module 310, a second display module 320, a third display module 340 and a backlight module 330.
The third display module 340 has the same structure as the second display module 320, and will not be described herein. The third display module 340 is located between the second display module 320 and the backlight module 330, and the third display module 340 and the second display module 320 reflect the light with the same color to enhance the reflectivity of the color.
Further, fig. 6 shows a reflective display screen according to a third embodiment of the present application. The reflective display screen of the third embodiment has a different backlight module 350 compared to the reflective display screen of the first embodiment.
Referring to fig. 6, the reflective display 300 includes a first display module 310, a second display module 320, and a backlight module 350, where the backlight module 350 is, for example, a solar backlight module.
The light entering the second display module 320 is partially reflected by the second display module 320, and the remaining light can be absorbed by the solar backlight module 350, so as to be converted into electric energy to be supplied to the reflective display screen 300, so as to reduce the power consumption of the reflective display screen 300.
The reflective display screen combines the cholesteric liquid crystal display module and the diffuse reflection display module, adopts the diffuse reflection display module to reflect any two of red, green and blue three-color light, and adopts the cholesteric liquid crystal display module to reflect light of other colors of the red, green and blue three-color light, thereby improving the reflectivity and reducing the processing difficulty.
Further, the reflective display screen adopts the double-layer cholesteric liquid crystal display module to reflect light with the same color, so that the reflectivity of the color is improved, and the display effect is enhanced.
Further, the reflection type display screen can be matched with a solar backlight module, and the solar backlight module is used for absorbing unreflected light energy and converting the light energy into electric energy to serve as a display screen function, so that power consumption of the display screen is reduced.
Embodiments in accordance with the present utility model, as described above, are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model and various modifications as are suited to the particular use contemplated. The utility model is limited only by the claims and the full scope and equivalents thereof.
Claims (8)
1. A reflective display screen, comprising: the first display module and place in the second display module assembly of the below of first display module assembly, first display module assembly includes: the color film substrate and the array substrate are oppositely arranged, and the liquid crystal layer is positioned between the color film substrate and the array substrate;
the color film substrate comprises a first substrate, a color resistance layer is arranged on one side, close to the liquid crystal layer, of the first substrate, the color resistance layer comprises a first color resistance area, a second color resistance area and a transparent area, the first color resistance area and the second color resistance area are respectively one of red color resistance, green color resistance and blue color resistance, and the colors of the first color resistance area and the second color resistance area are different;
the array substrate comprises a second substrate opposite to the first substrate, an insulating layer and a second flat layer are sequentially covered on one side, close to the liquid crystal layer, of the second substrate, and a diffuse reflection layer and a second electrode layer are arranged on the second flat layer;
the second display module is a cholesteric liquid crystal display module, and the light reflected by the second display module has the same color as the rest one of the red color resistor, the green color resistor and the blue color resistor.
2. The reflective display screen according to claim 1, wherein a black matrix is disposed between the first color blocking region, the second color blocking region and the transparent region, a first flat layer is covered on the color blocking layer, the first flat layer is filled in the transparent region, and a first electrode layer is disposed on the first flat layer.
3. The reflective display screen of claim 2, wherein a raised structure is disposed on the second flat layer in a corresponding region of the first and second color blocker regions, the raised structure is covered with the diffuse reflection layer, the second electrode layer is disposed on the second flat layer in a corresponding region of the transparent region, and the diffuse reflection layer and the second electrode layer are disposed in different regions of the second flat layer.
4. The reflective display screen of claim 1, wherein the second display module comprises a third substrate and a fourth substrate disposed opposite to each other and a cholesteric liquid crystal layer disposed between the third substrate and the fourth substrate, a third electrode layer is disposed on a side of the third substrate adjacent to the cholesteric liquid crystal layer, and a fourth electrode layer is disposed on a side of the fourth substrate adjacent to the cholesteric liquid crystal layer.
5. The reflective display screen of claim 1, wherein the color of light passing through the first color blocker and the second color blocker is the color of light reflected by the first display module; the light reflected by the second display module passes through the transparent area of the color resistance layer.
6. The reflective display screen of claim 1, further comprising:
the backlight module is positioned on one side of the second display module, which is far away from the first display module, and the backlight module is a solar backlight module.
7. The reflective display screen of claim 6, further comprising:
the third display module is positioned between the backlight module and the second display module, and the third display module and the second display module have the same structure and the same color of reflected light.
8. The reflective display screen of claim 1, wherein the first display module is a diffuse reflective display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322339282.5U CN220473826U (en) | 2023-08-30 | 2023-08-30 | Reflective display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322339282.5U CN220473826U (en) | 2023-08-30 | 2023-08-30 | Reflective display screen |
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| Publication Number | Publication Date |
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| CN220473826U true CN220473826U (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322339282.5U Active CN220473826U (en) | 2023-08-30 | 2023-08-30 | Reflective display screen |
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| CN (1) | CN220473826U (en) |
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- 2023-08-30 CN CN202322339282.5U patent/CN220473826U/en active Active
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