Electronic paper with gray scale compensation and display device

Abstract

The utility model discloses electronic paper with gray scale compensation and a display device. The edge of the electronic paper comprises a gray scale compensation pixel combination unit; the gray scale compensation pixel combination unit comprises a gray scale compensation pixel A and a gray scale compensation pixel B; the pixel electrode area of the gray scale compensation pixel B is smaller than that of the gray scale compensation pixel A; the pixel electrode of the gray scale compensation pixel B is in electric signal communication with the pixel electrode of the gray scale compensation pixel A. The pixel electrode of the gray scale compensation pixel B is powered by the gray scale compensation pixel A. The structure and the combination of the gray scale compensation pixel combination units are more suitable for displaying on the arc-shaped edge, the display effect can be adjusted and set according to different gray scales, and the display effect is better.

Description

Technical Field

[0001] This application belongs to the field of display technology, and particularly relates to an electronic paper with gray-scale compensation and a display device. Background Art

[0002] An electronic paper ink screen is a display screen made using electrophoretic display technology. It drives electronic paper particles by continuously applying an electric field of a driving waveform to each pixel point through a driving IC chip to achieve the effect of displaying an image. The electronic paper ink screen display has the characteristics of ultra-low power consumption, low-frequency display, and power saving, and has a wide application market in price tags, advertising signs, and bus stops.

[0003] In the prior art, most electronic paper module products are square, as Figure 1 shown. With the development of more application scenarios, such as Figure 2 the circular display price tag shown, such as Figure 3 the word card shown, such as Figure 4 the electronic paper mobile phone case shown, etc., a display interface with rounded corners is more beautiful.

[0004] Glossary: EPD is the abbreviation of the English "electronic paper display", and its Chinese meaning is electronic paper display.

[0005] TFT is the abbreviation of the English "Thin Film Transistor", and its Chinese meaning is thin film field effect transistor; each pixel point on a TFT display is driven by a thin film transistor integrated behind it.

[0006] ITO is the abbreviation of the English "Indium Tin Oxide", and its Chinese meaning is indium tin oxide. In this application, electronic paper ITO refers to that the conductive film layer material of the transparent conductive film shielding glass is mainly ITO (indium tin oxide semiconductor) film. Summary of the Invention

[0007] The technical problem to be solved by this application is to solve the obvious sawtooth effect in the display at the circular arc edge in the prior art. An electronic paper with gray-scale compensation is designed. Through the structure and combination of the gray-scale compensation pixel combination unit, it is more suitable for display at the circular arc edge, and the display effect can be adjusted and set according to different gray scales, and the display effect is better.

[0008] The technical solution of this application to solve the above technical problems is an electronic paper with grayscale compensation. The edge of the electronic paper includes a grayscale compensation pixel combination unit; the grayscale compensation pixel combination unit includes a grayscale compensation pixel A and a grayscale compensation pixel B; the pixel electrode area of the above grayscale compensation pixel B is smaller than that of the above grayscale compensation pixel A; the pixel electrode of the above grayscale compensation pixel B is electrically connected to the pixel electrode of the above grayscale compensation pixel A, and the pixel electrode of the grayscale compensation pixel B is powered by the grayscale compensation pixel A.

[0009] The grayscale compensation pixel combination unit further includes a grayscale compensation pixel C; the pixel electrode area of the above grayscale compensation pixel C is smaller than that of the above grayscale compensation pixel B; the pixel electrode of the above grayscale compensation pixel C is electrically connected to the pixel electrode of the above grayscale compensation pixel B, and the pixel electrode of the grayscale compensation pixel C is powered by the grayscale compensation pixel B.

[0010] The edge of the electronic paper includes a grayscale compensation pixel combination unit KA and a grayscale compensation pixel combination unit KB; the grayscale compensation pixel combination unit KA includes a grayscale compensation pixel A and a grayscale compensation pixel B; the grayscale compensation pixel combination unit KB includes a grayscale compensation pixel A, a grayscale compensation pixel B, and a grayscale compensation pixel C; the grayscale compensation pixel combination unit KA and the grayscale compensation pixel combination unit KB are arranged alternately due to the arc change of the above edge.

[0011] The pixel electrode area of the above grayscale compensation pixel A is SA; the pixel electrode area of the above grayscale compensation pixel B is SB = (SA × R X ) × 100%, where R X is the reflectivity of the electronic paper at different gray levels.

[0012] The pixel area of the above grayscale compensation pixel B or grayscale compensation pixel C is reduced by reducing the outer dimension of the pixel electrode of the electronic paper.

[0013] The pixel electrode of the above grayscale compensation pixel B or grayscale compensation pixel C is rectangular, circular, or triangular.

[0014] For the above grayscale compensation pixel B or grayscale compensation pixel C, an opening is made inside the pixel electrode of the electronic paper to reduce the pixel electrode area.

[0015] The above internal opening is rectangular, circular, or triangular.

[0016] The brightness of the above grayscale compensation pixel B or grayscale compensation pixel C differs by an integer number of grayscale compensations. The above grayscale compensation is 64 - level grayscale compensation, 32 - level grayscale compensation, 16 - level grayscale compensation, 8 - level grayscale compensation, 4 - level grayscale compensation, or 2 - level grayscale compensation.

[0017] The technical solution of the present application for solving the above technical problems may also be a display device, including the electronic paper with gray scale compensation as described above.

[0018] One of the beneficial effects of the technical solution in the present application is that through the gray scale compensation pixel combination unit, the pixel structure is more suitable for edge display, the edge display effect is improved, and the jagged effect of edge display is reduced.

[0019] Another beneficial effect of the technical solution in the present application is that the pixel electrode of the gray scale compensation pixel B is powered by the gray scale compensation pixel A, which can reduce the complexity of the edge driving design and meet the requirements of edge display at the same time.

[0020] Another beneficial effect of the technical solution in the present application is that the setting of the gray scale compensation pixel C further enriches the pixel structure of the pixel combination unit and is suitable for different edge positions.

[0021] Another beneficial effect of the technical solution in the present application is that the combination of the gray scale compensation pixel combination unit KA and the gray scale compensation pixel combination unit KB makes the overall display effect of the edge of the electronic paper better.

[0022] Another beneficial effect of the technical solution in the present application is that the electrode area ratio of the gray scale compensation pixels A and B is set according to the reflectivity of different gray levels, which is easier to match with the overall display effect.

[0023] Another beneficial effect of the technical solution in the present application is that the pixel area of the gray scale compensation pixel is reduced by reducing the outer dimension of the pixel electrode of the electronic paper, which is easy to operate and understand.

[0024] Another beneficial effect of the technical solution in the present application is that the pixel area of the gray scale compensation pixel has an opening inside the pixel electrode of the electronic paper, reducing the pixel electrode area and providing multiple solutions for reducing the pixel area.

[0025] Another beneficial effect of the technical solution in the present application is that the pixel electrode is rectangular or circular or triangular, and the internal opening is rectangular or circular or triangular, with various shapes, which can meet the requirements of different application scenarios.

[0026] Another beneficial effect of the technical solution in the present application is that there are differences in the brightness of the compensation pixel B or the gray scale compensation pixel C, making the edge output effect more suitable for the edge requirements and reducing the jagged effect.

[0027] Another beneficial effect of the technical solution in the present application is that the display device has a good edge display effect. Description of the Drawings

[0028] Figure 1 is a schematic diagram of an electronic paper without gray scale compensation in the prior art Figure 1 ;

[0029] Figure 2 is a schematic diagram of an electronic paper without gray-scale compensation in the prior art Figure 2 ;

[0030] Figure 3 is a schematic diagram of an electronic paper without gray-scale compensation in the prior art Figure 3 ;

[0031] Figure 4 is a schematic diagram of an electronic paper without gray-scale compensation in the prior art Figure 4 ;

[0032] Figure 5 is a schematic diagram of an electronic paper without gray-scale compensation in the prior art Figure 5 ;

[0033] Figure 6 is Figure 5 a partially enlarged schematic diagram of

[0034] Figure 7 is a schematic diagram of the principle of the electronic paper unit pixel design;

[0035] Figure 8 is a top view schematic diagram of a single pixel of the electronic paper;

[0036] Figure 9 is an edge schematic diagram of an electronic paper without gray-scale compensation;

[0037] Figure 10 is an edge schematic diagram of one of the embodiments of the electronic paper with gray-scale compensation;

[0038] Figures 11 to 13 is Figure 10 a partially enlarged schematic diagram in

[0039] Figure 14 is an edge schematic diagram of the second embodiment of the electronic paper with gray-scale compensation;

[0040] Figure 15 is one of the top view schematic diagrams of a single pixel in the electronic paper with gray-scale compensation;

[0041] Figure 16 is the second top view schematic diagram of a single pixel in the electronic paper with gray-scale compensation;

[0042] Figure 17 is a schematic diagram of the electrical connection of the pixel electrodes of the gray-scale compensation pixels B and A. Detailed implementation manners

[0043] The following further details the implementation manners of the present application in conjunction with the respective drawings.

[0044] It should be noted that the following is a description of the preferred embodiments of the present application, which does not impose any limitations on the present application. The description of the preferred embodiments of the present application is only for the purpose of explaining the general principles of the present application. The embodiments described in the present application are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0045] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, terms such as "first", "second", and technical features numbered with Arabic numerals such as 1, 2, 3, etc., as well as numbers such as "A", "B", are only for descriptive purposes and are only for the convenience of explanation, and do not represent a chronological or spatial order relationship; they should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined with "first", "second", and numbered with Arabic numerals such as 1, 2, 3, etc. may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "several" is two or more, unless otherwise specifically defined.

[0046] For an electronic paper with a four-corner arc display interface, there are jagged images at the boundary between the display area and the border area, as Figure 5 shown by the dashed box and the Figure 6 locally enlarged view. There are obvious edge jagged phenomena in the arc display interface, and the display effect is not good. How to improve the display effect of the edge is a technical problem to be solved.

[0047] As Figure 7 and Figure 8 shown, a schematic diagram of the reflection display principle of an electronic paper. The reflectivity R of the electronic paper is R=(K x / (K 255 ×255))^2.2, where x represents the gray level number. It can be seen from the reflectivity formula that for different gray level numbers, the reflectivity is different. Based on this formula, the pixel electrode area S x corresponding to the brightness of the target gray level number can be designed as S=(S×R X )=S×(K x / (K 255×255))^2.2, where S represents the initial pixel electrode area, i.e., the pixel size area as shown Figure 8 below.

[0048] In traditional liquid crystal / OLED displays, the gray scale from black to white is divided into 256 equal parts from 0 to 255. However, in black-and-white e-paper displays, such a "fine" division cannot be achieved. Currently, the relatively mature mass production solution is a 16-gray-scale display effect, that is, the 256 equal parts of the gray scale are re-divided into 16 equal parts. In the 64-gray-scale compensation, the 256 equal parts of the gray scale are re-divided into 64 equal parts. In the 32-gray-scale compensation, the 256 equal parts of the gray scale are re-divided into 32 equal parts.

[0049] In this application, the brightness of the gray-scale compensation pixel B or the gray-scale compensation pixel C differs by an integer number of gray-scale compensations. The gray-scale compensation is 64-gray-scale compensation, 32-gray-scale compensation, 16-gray-scale compensation, 8-gray-scale compensation, 4-gray-scale compensation, or 2-gray-scale compensation. The compensation of 16 or 32 or 64 gray scales is just a relatively optimal implementation solution, and it is also possible even if it is not a multiple of "16".

[0050] Usually, the maximum number of gray scales in black-and-white e-paper displays is 16. Therefore, the number of gray scales for e-paper compensation is a multiple relationship of 16 gray scales, X = 16×x - 1 (x = 1, 2....16) or X = 32×x - 1 (x = 1, 2....8) or X = 64×x - 1 (x = 1, 2....4), which are 16-gray-scale compensation, 8-gray-scale compensation, and 4-gray-scale compensation respectively.

[0051] As Figure 9 shown, it is an e-paper without gray-scale compensation, and its edge display shows a serrated state, with a poor display effect.

[0052] As Figure 10 shown, it is an e-paper with gray-scale compensation. The edge of the e-paper includes a gray-scale compensation pixel combination unit, and the gray-scale compensation pixel combination unit includes three combination units labeled A110, A120, and A130.

[0053] As Figure 10 shown, the edge of the e-paper includes a gray-scale compensation pixel combination unit KA and a gray-scale compensation pixel combination unit KB; the gray-scale compensation pixel combination unit KA includes a gray-scale compensation pixel A and a gray-scale compensation pixel B; the gray-scale compensation pixel combination unit KB includes a gray-scale compensation pixel A, a gray-scale compensation pixel B, and a gray-scale compensation pixel C; the gray-scale compensation pixel combination unit KA and the gray-scale compensation pixel combination unit KB are arranged alternately due to the arc change of the above-mentioned edge.

[0054] As Figure 11 and Figure 12As shown, the grayscale compensation pixel combination unit includes a grayscale compensation pixel A and a grayscale compensation pixel B; the pixel electrode area of the grayscale compensation pixel B is smaller than that of the grayscale compensation pixel A.

[0055] As Figure 11 , in the grayscale compensation pixel combination unit A120, the pixel electrode area of the grayscale compensation pixel A is S X0 , and the pixel electrode area of the grayscale compensation pixel B is S X2 . As Figure 11 , the pixel electrode area of the grayscale compensation pixel A is S x0 ; the pixel electrode area of the grayscale compensation pixel B is S x2 =(S x0 ×R X )×100%, where R X is the reflectivity of the e-paper at different grayscale levels. That is, the ratio of the pixel electrode areas of the grayscale compensation pixels A and B can be set according to different grayscale levels to match the edge display effect with the corresponding grayscale level. Thus, the abruptness of edge jaggedness in the display can be avoided, and the edge display effect can be improved.

[0056] As Figure 12 , in the grayscale compensation pixel combination unit A130, the pixel electrode area of the grayscale compensation pixel A is S X1 , and the pixel electrode area of the grayscale compensation pixel B is S X2 .

[0057] As Figure 13 shown, the grayscale compensation pixel combination unit includes a grayscale compensation pixel A, a grayscale compensation pixel B, and a grayscale compensation pixel C; the pixel electrode area of the grayscale compensation pixel C is smaller than that of the grayscale compensation pixel B; the pixel electrode of the grayscale compensation pixel C is electrically connected to the pixel electrode of the grayscale compensation pixel B, and the pixel electrode of the grayscale compensation pixel C is powered by the pixel electrode of the grayscale compensation pixel B. The pixel electrode area of the grayscale compensation pixel A is S X0 ; the pixel electrode area of the grayscale compensation pixel B is S X1 , and the pixel electrode area of the grayscale compensation pixel C is S X2 .

[0058] As Figure 14 shown, it is an e-paper with grayscale compensation. The edge of the e-paper includes a grayscale compensation pixel combination unit, and the grayscale compensation pixel combination unit includes three combination units labeled B110, B120, and B130.

[0059] There are two design methods for reducing the pixel electrode area. Method 1 is as Figure 15 shown, reducing equally on all four sides; or as Figure 16As shown, a hollowing process is performed on the pixel electrode.

[0060] As Figure 15 shown, the pixel area of the above grayscale compensation pixel B or grayscale compensation pixel C is reduced by reducing the outer dimension of the pixel electrode of the electronic paper. In embodiments not shown in some of the drawings, the pixel electrode of the above grayscale compensation pixel B or grayscale compensation pixel C is rectangular, circular or triangular.

[0061] As Figure 16 shown, for the above grayscale compensation pixel B or grayscale compensation pixel C, an opening C80 is made inside the pixel electrode of the electronic paper to reduce the pixel electrode area SC. In embodiments not shown in some of the drawings, the above internal opening is rectangular, circular or triangular.

[0062] As Figure 17 , the pixel electrode of the above grayscale compensation pixel B is electrically connected to the pixel electrode of the above grayscale compensation pixel A, and the pixel electrode of the grayscale compensation pixel B is powered by the grayscale compensation pixel A. Figure 17 In, the left side is a schematic diagram of the electrical connection of the electrode of the grayscale compensation pixel A, and the right side is a schematic diagram of the electrical connection of the electrode of the grayscale compensation pixel B. It can be seen from the figure that the pixel electrode of the grayscale compensation pixel B is powered by the grayscale compensation pixel A.

[0063] In embodiments not shown in some of the drawings, the pixel electrode area of the above grayscale compensation pixel A is SA; the pixel electrode area of the above grayscale compensation pixel B is SB = (SA × R X ) × 100%, R X is the reflectivity of the electronic paper at different grayscale levels.

[0064] In embodiments not shown in some of the drawings, the brightness of the above grayscale compensation pixel B or grayscale compensation pixel C differs by an integer number of grayscale compensations, and the above grayscale compensation is 16 - level grayscale compensation, 8 - level grayscale compensation or 4 - level grayscale compensation.

[0065] A display device includes the above - mentioned electronic paper with grayscale compensation.

[0066] As shown in the above - mentioned drawings, the above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the application specification and the drawings, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. An electronic paper with gray-scale compensation, characterized in that the edge of the electronic paper includes a gray-scale compensation pixel combination unit; the gray-scale compensation pixel combination unit includes a gray-scale compensation pixel A and a gray-scale compensation pixel B; the pixel electrode area of the gray-scale compensation pixel B is smaller than that of the gray-scale compensation pixel A; the pixel electrode of the gray-scale compensation pixel B is electrically connected to the pixel electrode of the gray-scale compensation pixel A, and the pixel electrode of the gray-scale compensation pixel B is powered by the gray-scale compensation pixel A.

2. The electronic paper with gray-scale compensation according to claim 1, wherein The gray-scale compensation pixel combination unit further includes a gray-scale compensation pixel C; the pixel electrode area of the gray-scale compensation pixel C is smaller than that of the gray-scale compensation pixel B; the pixel electrode of the gray-scale compensation pixel C is electrically connected to the pixel electrode of the gray-scale compensation pixel B, and the pixel electrode of the gray-scale compensation pixel C is powered by the gray-scale compensation pixel B.

3. The electronic paper with gray-scale compensation according to claim 2, characterized in that the edge of the electronic paper includes a gray-scale compensation pixel combination unit KA and a gray-scale compensation pixel combination unit KB; the gray-scale compensation pixel combination unit KA includes a gray-scale compensation pixel A and a gray-scale compensation pixel B; the gray-scale compensation pixel combination unit KB includes a gray-scale compensation pixel A, a gray-scale compensation pixel B, and a gray-scale compensation pixel C; the gray-scale compensation pixel combination unit KA and the gray-scale compensation pixel combination unit KB are arranged alternately due to the arc change of the edge.

4. The electronic paper with gray-scale compensation according to claim 1, wherein The pixel electrode area of the gray-scale compensation pixel A is SA; The pixel electrode area of the grayscale compensation pixel B is SB = (SA × R X ) × 100%, where R X is the reflectivity of the electronic paper at different grayscale levels.

5. The electronic paper with gray-scale compensation according to claim 2, characterized in that the pixel area of the gray-scale compensation pixel B or the gray-scale compensation pixel C is reduced by reducing the outer dimension of the pixel electrode of the electronic paper.

6. The electronic paper with gray-scale compensation according to claim 5, characterized in that the pixel electrode of the gray-scale compensation pixel B or the gray-scale compensation pixel C is rectangular, circular or triangular.

7. The electronic paper with gray-scale compensation according to claim 2, characterized in that the gray-scale compensation pixel B or the gray-scale compensation pixel C has an opening inside the pixel electrode of the electronic paper.

8. The electronic paper with gray-scale compensation according to claim 7, wherein The internal opening is rectangular, circular or triangular.

9. The electronic paper with gray-scale compensation according to claim 2, characterized in that the brightness of the gray-scale compensation pixel B or the gray-scale compensation pixel C differs by an integer number of gray-scale compensations, and the gray-scale compensation is 64 gray-scale compensation, 32 gray-scale compensation, 16 gray-scale compensation, 8 gray-scale compensation, 4 gray-scale compensation or 2 gray-scale compensation.

10. A display device, characterized in that it includes the electronic paper with gray-scale compensation according to any one of claims 1 to 8.

Images