WO2019161642A1

WO2019161642A1 - Color display device

Info

Publication number: WO2019161642A1
Application number: PCT/CN2018/099505
Authority: WO
Inventors: 胡典禄; 王喜杜; 曾晞
Original assignee: 广州奥翼电子科技股份有限公司
Priority date: 2018-02-26
Filing date: 2018-08-09
Publication date: 2019-08-29
Also published as: CN108333847A

Abstract

A color display device, comprising a driving circuit board (1), a display layer (2), a common electrode (3), and multiple color filters (4); the color display device has multiple sub-pixel points (8); some or all of the sub-pixel points are color sub-pixel points; the driving circuit board (1) is provided with multiple sub-pixel electrodes (11) having one-to-one correspondence to the multiple sub-pixel points (8); each color sub-pixel point (8) is provided with one or more of the color filters (4); the area of the color filters (4) is less than the area of the corresponding color sub-pixel point (8). Therefore, compared with the prior art, the color display device has higher display brightness and a better display effect during color display.

Description

Color display device

Technical field

The present invention relates to the field of display devices, and more particularly to a color display device.

Background technique

Electrophoretic displays are paper-thin, soft and rewritable displays that have gained increasing popularity in billboards and price cards in recent years. The existing electrophoretic display basically can only display two colors of black and white, which makes its application greatly limited. In order to make the electrophoretic display have a color display function, the researchers added a color filter to the electrophoretic display to enable color display. Referring to FIG. 12, in the prior art, a color filter 10 is disposed on each color sub-pixel dot 9, and the color filter 10 completely covers the color sub-pixel dot 9, that is, the color filter 10 The area is equal to the area of the color sub-pixel 9 . In such an electrophoretic display, if the color of the color filter 10 is dark, the display brightness of the display is low, and if the color of the color filter 10 is light, the color saturation of the display is low, so the color of the display The display is poor.

Summary of the invention

In view of the deficiencies of the prior art, the present invention aims to provide a color display device with better display effect.

In order to solve the above technical problem, an embodiment of the present invention provides a color display device including a driving circuit board, a display layer, a common electrode, and a plurality of color filters, wherein the driving circuit board, the display layer, and the common electrode are stacked and connected. The display layer is disposed between the driving circuit board and the common electrode, wherein the color display device has a plurality of sub-pixel points, wherein a part of the sub-pixel points or all sub-pixel points are color sub-pixel points, the driving circuit board Providing a plurality of sub-pixel electrodes corresponding to the plurality of sub-pixels in a one-to-one correspondence, the plurality of color filters being disposed on a viewing side of the display layer and in a direction parallel to an upper surface of the display layer Arranged, one or more color filters are disposed on each color sub-pixel point, and the area of the color filter is smaller than the area of the corresponding color sub-pixel point.

As a further improvement of the above embodiment, the color filters of adjacent color sub-pixel dots have different colors.

As a further improvement of the above embodiment, in a direction parallel to the upper surface of the display layer, there is a gap between adjacent color filters, and the display layer is exposed from a gap between the color filters.

As a further improvement of the above embodiment, each color sub-pixel dot is provided with 2-9 color filters of the same color.

As a further improvement of the above embodiment, each color sub-pixel dot includes four rectangular color filters distributed in a matrix, and the gap between the four rectangular color filters forms a cross shape.

As a further improvement of the above embodiment, the ratio of the area of the color filter of each color sub-pixel dot to the area of each of the color sub-pixel dots is 0.13-0.9:1, preferably 0.3-0.8:1.

As a further improvement of the above embodiment, each color sub-pixel dot comprises a plurality of rectangular color filters having a gap between adjacent color filters in a direction parallel to an upper surface of the display layer, each color The ratio of the gap width between adjacent color filters of the sub-pixels to the side length of the color filter is 0.1-0.6:1, preferably 0.2-0.3:1; or

Each color sub-pixel dot includes a rectangular color filter, and a ratio of a gap width between adjacent two color filters to a side length of the color filter is 0.05-1.75:1, preferably 0.2- 0.6:1.

As a further improvement of the above embodiment, the color display device comprises a filter substrate, and all color filters of the color display device are disposed on the filter substrate; or

The color display device includes a plurality of stacked filter substrates, and color filters of the same color are located on the same filter substrate.

As a further improvement of the above embodiment, the display layer comprises a plurality of display micro-units distributed laterally along the display layer, each of the display micro-units comprising a transparent closed casing and an electrophoresis liquid encapsulated in the transparent closed casing And a plurality of electrophoretic particles suspended in the electrophoresis liquid.

As a further improvement of the above embodiment, each of the display microcells comprises a plurality of charged white electrophoretic particles and a plurality of electrically neutral black electrophoretic particles; or

Each of the display microcells includes a plurality of white electrophoretic particles and a plurality of black electrophoretic particles, and the white electrophoretic particles and the black electrophoretic particles are asymmetrically charged.

As a further improvement of the above embodiment, the common electrode is transparent and disposed on a viewing side of the display layer, and the driving circuit board is disposed on another side of the display layer opposite to the viewing side, the color a filter disposed on a viewing side of the common electrode; or

The driving circuit board is transparent and disposed on a viewing side of the display layer, the common electrode is disposed on another side of the display layer opposite to the viewing side, and the color filter is disposed on the driving side The viewing side of the board.

As a further improvement of the above embodiment, the display micro-unit is a microcapsule, the display layer further comprises a solidified dispersion medium, the plurality of microcapsules are distributed in the solidified dispersion medium, the display layer and the public The electrodes and/or the display layer and the driving circuit board are connected by an adhesive layer, and the ratio of the thickness of the display layer to the thickness of the adhesive layer is 1-10:1.

As a further improvement of the above embodiment, the plurality of sub-pixel points are distributed in a matrix, and the minimum repeating units of the plurality of sub-pixel points are arranged in RGB, RGBG, RGBW or CMYW, wherein R, G, B, C, M, Y And W are respectively a red sub-pixel point, a green sub-pixel point, a blue sub-pixel point, a cyan sub-pixel point, a magenta sub-pixel point, a yellow sub-pixel point, and a white sub-pixel point, and the white sub-pixel point is not set. Color filter.

As a further improvement of the above embodiment, the color display device has a plurality of pixel points, wherein some or all of the pixel points are color pixel points, and each pixel point includes 2 to 9 adjacent sub-pixel points, each Color filters of the same color are disposed on all sub-pixel points corresponding to the color pixel points, the plurality of pixel points are distributed in a matrix, and the minimum repeating unit of the plurality of pixel points is RGB, RGBG, RGBW or CMYW Arrangement, wherein R, G, B, C, M, Y, and W are red pixel, green pixel, blue pixel, cyan pixel, magenta pixel, yellow pixel, and white pixel, respectively The color filter is not disposed on the sub-pixel point corresponding to the pixel.

In the color display device of the embodiment of the present invention, since the area of the color filter is smaller than the area of the corresponding color sub-pixel point, a portion of the display layer of each color sub-pixel is not covered by the color filter, when the color When the display device performs color display, the brightness of the display layer not covered by the color filter is greater than the brightness of the display layer covered by the color filter, so the color display of the embodiment of the present invention is compared with the prior art. The device has a higher display brightness in color display, and the display effect is better.

DRAWINGS

FIG. 1 is a schematic structural diagram of a color display device according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a color display device according to another embodiment of the present invention.

3 to 6 are schematic views showing the distribution of color filters in four embodiments of the present invention.

FIG. 7 is a schematic diagram of a color filter superposition structure according to an embodiment of the present invention.

8 to 11 are schematic diagrams showing distribution of sub-pixel points according to an embodiment of the present invention.

Fig. 12 is a schematic view showing the distribution of color filters in the prior art.

Detailed ways

The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments to enable those skilled in the art to understand the invention. .

As shown in FIG. 1 to FIG. 11 , an embodiment of the present invention provides a color display device including a driving circuit board 1, a display layer 2, a common electrode 3, and a plurality of color filters 4. The driving circuit board 1, the display layer 2 and the common electrode 3 are connected in a stack, the display layer 2 is disposed between the driving circuit board 1 and the common electrode 3, and the driving circuit board 1 and the common electrode 3 are used to apply electricity on both sides of the display layer 2. The signal causes display layer 2 to be displayed. The color filter 4 is disposed on the viewing side of the display layer 2, and is arranged in a direction parallel to the upper surface (viewing side seconds) of the display layer 2, so that the color display device has a color display effect. The color display device has a plurality of sub-pixel dots 8 , wherein a portion of the sub-pixel dots 8 or all of the sub-pixel dots 8 are color sub-pixel dots, and the sub-pixel electrode 11 corresponding to the plurality of sub-pixel dots 8 is disposed on the driving circuit board 1 . The sub-pixel electrode 11 is connected to a driving circuit on the driving circuit board 1. Specifically, each sub-pixel point 8 is a minimum display unit composed of a sub-pixel electrode 11, a region corresponding to the sub-pixel electrode 11 on the display layer 2, and a region corresponding to the sub-pixel electrode 11 on the common electrode 3, and a sub-pixel point. The size of 8 is typically between 50 and 200 microns, and color display devices typically include hundreds of thousands to tens of millions of sub-pixel points. In the color display device, all of the sub-pixels 8 may be color sub-pixels 8, such as red, blue, and green, or some sub-pixels 8 may be white sub-pixels, and the other sub-pixels 8 may be colored sub-pixels. Pixel point 8. In general, three to four adjacent sub-pixel dots 8 may constitute a minimum repeating unit on a color display device, that is, constitute one pixel.

Referring to FIG. 1 to FIG. 6, each color sub-pixel point 8 is provided with one or more color filters 4, and the area of the color filter 4 is smaller than the area of the corresponding color sub-pixel point 8. The area referred to herein means the area on a plane parallel to the upper surface of the display layer 2. The area of the sub-pixel point 8 referred to herein is calculated by dividing the area of the display area on the display layer 2 by the number of sub-pixel points 8. The area of the color filter 4 referred to herein means the total area occupied by the color filter 4 of the color sub-pixel point 8. When a color filter 4 is disposed on the color sub-pixel point 8, the area of the color filter 4 is the area of the color filter 4; when the color sub-pixel point 8 is provided with a plurality of color filters At 4 o'clock, the area of the color filter 4 is the sum of the areas of the plurality of color filters 4. The shape of the color filter 4 may be a rectangle, a triangle, a hexagon, a circle, or the like. The color that can be displayed for each color sub-pixel point 8 is determined by the color of its corresponding color filter 4. Since the area of the color filter 4 on each color sub-pixel point 8 is smaller than the area of the corresponding color sub-pixel point 8, that is, the color filter 4 only partially covers the color sub-pixel point 8, so that each color sub-segment The pixel 8 has a portion of the display layer 2 exposed from the area not covered by the color filter 4, so that when the display layer 2 displays white, the display brightness of the color sub-pixel 8 can be made higher by color When the filter material of the filter 4 is made thicker, the color saturation of the color sub-pixel dots 8 can be made higher, so that the color display effect of the color display device is better. Referring to FIG. 3, for the achromatic sub-pixel point 8, for example, the white sub-pixel point 8, the color filter 4 may not be disposed on the viewing side.

Referring to FIG. 3, FIG. 4, and FIG. 8 to FIG. 10, in a preferred embodiment, the colors of the color filters 4 of adjacent color sub-pixel dots 8 are different. For example, each sub-pixel point 8 may be distributed in a matrix to form a plurality of rectangular block arrays, and the minimum repeating unit is arranged in RGB, RGBG, RGBW or CMYW, wherein R, G, B, C, M, Y, and W respectively Red color sub-pixels, green sub-pixels, blue sub-pixels, cyan sub-pixels, magenta sub-pixels, yellow sub-pixels, and white sub-pixels, color filters 4 on each color sub-pixel The color of the color is the same as the color of each color sub-pixel, and the color filter 4 is not provided on the white sub-pixel. The RGB arrangement is as shown in FIG. 9, that is, three R, G, and B sub-pixels are arranged in a horizontal or vertical direction to form a minimum repeating unit, that is, a pixel point, wherein the order of R, G, and B can be changed. Then, a plurality of minimum repeating units are repeatedly arranged in the lateral direction and the longitudinal direction based on the minimum repeating unit. The arrangement of RGBG is as shown in Fig. 8. That is, four R, G, B, and G sub-pixels are arranged in a rectangular shape to form a minimum repeating unit, that is, one pixel point, and two G sub-pixel points are diagonal. The line distribution is then repeated with a plurality of minimum repeating units in the lateral and longitudinal directions based on the minimum repeating unit. Similar to the RGBG arrangement, the RGBW arrangement is that R, G, B, and W sub-pixels are arranged in a rectangular shape to form a minimum repeating unit, and the order of R, G, B, and W can be changed, as shown in FIG. 3 and FIG. Shown. The CMYW arrangement is that the four sub-pixels of C, M, Y, and W are arranged in a rectangular shape to form a minimum repeating unit, and the order of C, M, Y, and W can be changed, as shown in FIG.

In another preferred embodiment, the color display device has a plurality of pixel points, wherein some of the pixel points or all of the pixel points are color pixel points, and each pixel point includes 2 to 9 adjacent sub-pixel points 8, each of A color filter of the same color is disposed on all sub-pixels 8 corresponding to the color pixel, and a plurality of pixel points are distributed in a matrix, and the smallest repeating unit of the plurality of pixels is arranged in RGB, RGBG, RGBW or CMYW. , wherein R, G, B, C, M, Y, and W are red pixel, green pixel, blue pixel, cyan pixel, magenta pixel, yellow pixel, and white pixel, respectively, white pixel The color filter 4 is not provided on the corresponding sub-pixel point 8. When each pixel includes two adjacent sub-pixels 8, the two sub-pixels 8 are distributed along the lateral or longitudinal direction of the display layer 2, and when each pixel includes nine adjacent sub-pixels 8, These nine adjacent sub-pixel points 8 can be distributed in a nine-square format. Taking the color display device shown in FIG. 11 as an example, each pixel includes four adjacent sub-pixel points 8 distributed in a rectangular shape, and a plurality of pixel points are distributed in an RGBW manner, and each of the red pixel points includes four upper settings. Subpixels 8 having red filters, respectively, correspondingly each of the green and blue pixels includes four sub-pixels 8 with green and blue filters disposed thereon, and white pixels include four The sub-pixel dots of the color filter 4 are not set. The color display device of this embodiment can be applied to a scene where the pixel precision is not high.

Referring to FIGS. 3 to 6, in a direction parallel to the upper surface of the display layer 2, there is a gap between adjacent color filters 4, and the display layer 2 is exposed from the gap between the color filters 4. When a color filter 4 is disposed on the color sub-pixel dots 8, there is a gap between the color filters 4 on the adjacent two color sub-pixel dots 8. When a plurality of color filters 4 are disposed on the color sub-pixel dots 8, the adjacent color filters 4 on the color sub-pixel dots 8 also have a gap therebetween.

In a preferred embodiment, 2-9 color filters 4 can be placed on each color sub-pixel dot 8. Referring to FIG. 3, FIG. 5 and FIG. 6, when two color filters 4 are disposed on each color sub-pixel point 8, two color filters 4 may be arranged side by side, when each color sub-pixel point 8 When four color filters 4 are disposed, the four color filters 4 may be distributed in a matrix. When nine color filters 4 are disposed on each color sub-pixel point 8, nine color filters 4 are provided. Can be distributed in a nine-square format. Since a plurality of color filters 4 are disposed on each color sub-pixel dot 8 and a gap is provided between adjacent color filters 4, the color presented by each color sub-pixel dot 8 can be made uniform.

Referring to FIG. 3, each color sub-pixel dot 8 includes four rectangular color filters 4 distributed in a matrix, and the gap between the four rectangular color filters 4 forms a cross. This arrangement can make the color sub-pixel dots 8 have a balanced color and brightness distribution, and the display effect is better.

In a preferred embodiment, the ratio of the area of the color filter 4 of each color sub-pixel dot 8 to the area of each color sub-pixel point 8 is from 0.13 to 0.9:1. If the ratio of the area is too small, the color saturation of the color display device is lowered, and if the ratio of the area is too large, the brightness of the color display device is lowered. Controlling the ratio of the area to 0.13-0.9:1 ensures that the color display device has a better display effect. Preferably, the ratio of the area of the color filter 4 of each color sub-pixel point 8 to the area of each color sub-pixel point 8 is 0.3-0.8:1.

Referring to FIG. 3, FIG. 5 and FIG. 6, each color sub-pixel dot 8 includes a plurality of rectangular color filters 4, between adjacent color filters 4 in a direction parallel to the upper surface of the display layer 2. With a gap, the side length of the rectangular color filter 4 (including the long side length and the wide side length) is between 40 and 160 microns, between each adjacent color filter 4 of each color sub-pixel point 8. The ratio of the gap width to the side length of the color filter 4 is from 0.1 to 0.6:1, preferably from 0.2 to 0.3:1. It should be noted that the side length of the color filter 4 referred to herein means the side length of the opposite sides of the two rectangles corresponding to the gap. That is, as shown in FIG. 6, each color sub-pixel dot 8 includes two rectangular color filters 4 arranged at intervals, a pitch w between two rectangular color filters 4, and two rectangular color filters 4 The ratio of the side length d of the opposite side is 0.1-0.6:1. For example, a display includes 800*600 sub-pixels 8, each sub-pixel 8 is a square having a side length of 110 micrometers, and its w value can be 10 micrometers, and the d value can be 100 micrometers correspondingly, and the w value can also be For 40 microns, the d value can correspondingly be 70 microns.

Referring to FIG. 4, in another preferred embodiment, each color sub-pixel dot 8 includes a rectangular color filter 4 adjacent to two color filters 4 (ie, adjacent two color sub-pixel dots 8). The ratio of the gap width between the color filters 4) to the side length of the color filter 4 is 0.05 to 1.75:1, preferably 0.2 to 0.6:1. Similarly, for example, a square having a side length of 110 micrometers per sub-pixel point 8 may have a gap width of 6 micrometers between adjacent two color filters 4, and a side length of the color filter 4 may be 104 micrometers. Alternatively, the gap width between adjacent two color filters 4 may be 70 micrometers, and the side length of the color filter 4 may correspondingly be 40 micrometers.

Referring to FIG. 1 and FIG. 2, in some embodiments, the color display device includes a filter substrate 41 on which all of the color filters 4 of the color display device are disposed. Specifically, a plurality of color filters 4 can be formed by forming filter films of different colors on the same filter substrate 41 by printing, vapor deposition, or the like. Referring to FIG. 4, in other embodiments, the color display device includes a plurality of stacked filter substrates 41, and the color filters 4 of the same color are located on the same filter substrate 41, and different filter substrates The color filters 4 on the 41 are staggered and do not overlap. In other embodiments, each of the color filters 4 may be independent of each other, that is, the same filter substrate 41 is not shared.

Referring to FIG. 1, in a preferred embodiment, the display layer 2 includes a plurality of display micro-units 21 distributed laterally along the display layer 2. Each display micro-unit 21 includes a transparent closed casing, an electrophoresis liquid encapsulated in a transparent closed casing, and A plurality of colored electrophoretic particles suspended in an electrophoresis fluid. Under the action of the voltages of the pixel electrode 11 and the common electrode 3, the electrophoretic particles move in the electrophoresis liquid, approaching or moving away from the pixel electrode 11 and the common electrode 3, thereby forming a pattern or a character. In a preferred embodiment, display microcell 21 can be a microcapsule or a microcup. The specific structure of the microcapsule can be referred to the relevant description in the Chinese patent application CN103091926A. The structure of the microcup can refer to the related description in the Chinese patent CN1246730C, and details are not described herein again. When the microcell 21 is shown to be a microcapsule, the transparent closed casing is the wall of the microcapsule, and when the microcell 21 is shown as a microcup, the transparent closure is a spacer material between the microcups. In other embodiments, display layer 2 can also be a cholesteric liquid crystal display layer or an electrowetting display layer.

In a further preferred embodiment, each display microcell 21 comprises a plurality of charged white electrophoretic particles and a plurality of electrically neutral black electrophoretic particles, the plurality of white electrophoretic particles being driven by an electrical signal to the display microcell 21 When the side is viewed, the sub-pixel 8 has the same color as the color filter 4, and when the white electrophoretic particles are away from the viewing side of the display micro-unit 21, the sub-pixel 8 is black. The working principle of the color display device can be referred to the related description in Chinese Patent Application No. CN101738814A. In other preferred embodiments, each display microcell 21 comprises a plurality of white electrophoretic particles and a plurality of black electrophoretic particles, and the white electrophoretic particles and the black electrophoretic particles are oppositely charged, for example, the white electrophoretic particles are positively charged, and the black electrophoretic particles are With a negative charge. When a plurality of white electrophoretic particles are electrically driven to the viewing side of the display microcell 21, the black electrophoretic particles are driven to the side of the display microcell 21 away from the viewing side, the subpixel 8 being colored with the color filter 4 The same color, while the white electrophoretic particles are away from the viewing side of the display microcell 21, the black electrophoretic particles are driven to the viewing side of the display microcell 21, at which point the subpixel dot 8 is black.

Referring to FIG. 1, the common electrode 3 is transparent and disposed on the viewing side of the display layer 2. The driving circuit board 1 is disposed on the other side of the display layer 2 opposite to the viewing side, and the color filter 4 is disposed on the common electrode 3. side. In this embodiment, the common electrode 3 can be obtained by coating, vapor-depositing or the like on a PET, PT or glass substrate by using an ITO conductive film or a graphene conductive film, and the driving circuit board 1 can pass through the glass or The driving circuit and the pixel electrode 11 are formed by a semiconductor process on a plastic substrate, and an integrated circuit chip or the like can be disposed on the driving circuit board 1. The common electrode 3 and the driving circuit board 1 can be connected by a metal wire passing through the display layer 2. A transparent protective cover 6 may be disposed outside the viewing side of the color filter 4, and a sealant 7 is filled between the transparent protective cover 6 and the driving circuit board 1, and the display layer 2, the common electrode 3, the color filter 4, etc. Encapsulated. Referring to FIG. 2, in other embodiments, the driving circuit board 1 is transparent and disposed on the viewing side of the display layer 2, and the common electrode 3 is disposed on the other side of the display layer 2 opposite to the viewing side, the color filter 4 It is disposed on the viewing side of the driving circuit board 1. In this embodiment, the driving circuit board 1 can be obtained by forming a thin film transistor (TFT) circuit by using a semiconductor process on a glass substrate or a PET substrate. The common electrode 3 can be transparent or opaque, and the common electrode 3 and the display layer 2 are outsourced. Cover the sealant 7. In other embodiments, when the common electrode 3 is disposed on the viewing side of the display layer 2, the color filter 4 may also be disposed between the display layer 2 and the common electrode 3.

Referring to FIG. 1 and FIG. 2, in a preferred embodiment, the display micro-unit 21 is a microcapsule, and the display layer 2 further comprises a solidified dispersion medium. The plurality of microcapsules are distributed in the solidified dispersion medium, and the display layer 2 and the common electrode 3 are The interlayer and/or display layer 2 is connected to the driving circuit board 1 through the adhesive layer 5, and the ratio of the thickness of the display layer 2 to the thickness of the adhesive layer 5 is 1-10:1. The display layer 2 can be formed by coating an electronic ink on the common electrode 3, the electronic ink containing a plurality of microcapsules, and then drying the electronic ink to form the display layer 2. The composition and manufacturing method of the electronic ink can be referred to the relevant description in the Chinese patent application CN106292118A. The adhesive layer 5 can be formed by coating an adhesive on the surface of the display layer 2 and curing. The adhesive layer 5 can have a certain electrical conductivity. If the adhesive layer 5 is too thick, the voltage applied to the display layer 2 by the common electrode 3 and the driving circuit board 1 is lowered. When the adhesive layer 5 is disposed on the viewing side of the display layer 2, the adhesive layer 5 is transparent, and the too thick adhesive layer 5 affects the light transmittance of the display layer 2 to the surface of the color display device, thereby affecting the color display. Optical properties of the device. If the adhesive layer 5 is too thin, the connection strength between the display layer 2 and the common electrode 2 or the driving circuit board 1 is affected, so that the color display device is easily damaged when subjected to mechanical shock. Therefore, the ratio of the thickness of the display layer 2 to the thickness of the adhesive layer 5 is controlled to 1-10:1, so that the color display device can have both good electro-optical display performance and good mechanical strength. Generally, the thickness of the display layer 2 is between 20 micrometers and 150 micrometers, and the thickness of the adhesive layer 5 is generally between 15 micrometers and 20 micrometers.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-mentioned embodiments are merely illustrative of several embodiments of the invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A color display device includes a driving circuit board, a display layer, a common electrode, and a plurality of color filters, wherein the driving circuit board, the display layer, and the common electrode are connected in a stack, and the display layer is disposed on the driving circuit board Between the common electrode and the common electrode, the color display device has a plurality of sub-pixel points, wherein a part of the sub-pixel points or all sub-pixel points are color sub-pixel points, and the driving circuit board is provided with a plurality of sub-pixels Point-to-one corresponding sub-pixel electrodes, the plurality of color filters being disposed on a viewing side of the display layer and arranged in a direction parallel to an upper surface of the display layer, wherein each color sub-pixel One or more color filters are disposed on the dots, and the area of the color filters is smaller than the area of the corresponding color sub-pixel dots.
The color display device according to claim 1, wherein the color filters of adjacent color sub-pixel dots have different colors.
A color display device according to claim 1, wherein a gap is provided between adjacent color filters in a direction parallel to an upper surface of said display layer, said display layer being from said color filter The gap between them is exposed.
The color display device according to claim 3, wherein each of the color sub-pixel dots is provided with 2-9 color filters of the same color.
The color display device according to claim 4, wherein each of the color sub-pixel dots comprises four rectangular color filters distributed in a matrix, and a gap between the four rectangular color filters forms a cross. .
The color display device according to claim 1, wherein a ratio of an area of the color filter of each color sub-pixel dot to an area of each of the color sub-pixel dots is 0.13-0.9:1, preferably It is 0.3-0.8:1.
A color display device according to claim 1, wherein each of the color sub-pixel dots comprises a plurality of rectangular color filters, adjacent to the color filters in a direction parallel to an upper surface of the display layer With a gap therebetween, the ratio of the gap width between adjacent color filters of each color sub-pixel point to the side length of the color filter is 0.1-0.6:1, preferably 0.2-0.3:1. ;or

Each color sub-pixel dot includes a rectangular color filter, and a ratio of a gap width between adjacent two color filters to a side length of the color filter is 0.05-1.75:1, preferably 0.2- 0.6:1.
A color display device according to claim 1, wherein said color display device comprises a filter substrate, and all color filters of said color display device are disposed on said filter substrate;

The color display device includes a plurality of stacked filter substrates, and color filters of the same color are located on the same filter substrate.
A color display device according to claim 1, wherein said display layer comprises a plurality of display microcells distributed laterally along said display layer, each of said display microcells comprising a transparent closed casing, encapsulated in said An electrophoretic liquid in the transparent closed casing and a plurality of electrophoretic particles suspended in the electrophoresis liquid.
A color display device according to claim 9, wherein each of said display microcells comprises a plurality of charged white electrophoretic particles and a plurality of electrically neutral black electrophoretic particles; or

Each of the display microcells includes a plurality of white electrophoretic particles and a plurality of black electrophoretic particles, and the white electrophoretic particles and the black electrophoretic particles are asymmetrically charged.
The color display device according to claim 9, wherein the common electrode is transparent and disposed on a viewing side of the display layer, and the driving circuit board is disposed on the display layer opposite to the viewing side On the other side, the color filter is disposed on a viewing side of the common electrode; or

The driving circuit board is transparent and disposed on a viewing side of the display layer, the common electrode is disposed on another side of the display layer opposite to the viewing side, and the color filter is disposed on the driving side The viewing side of the board.
A color display device according to claim 9, wherein said display micro-unit is a microcapsule, said display layer further comprising a solidified dispersion medium, said plurality of microcapsules being distributed in said solidified dispersion medium, The display layer and the common electrode and/or the display layer and the driving circuit board are connected by an adhesive layer, and the ratio of the thickness of the display layer to the thickness of the adhesive layer is 1- 10:1.
The color display device according to any one of claims 1 to 12, wherein the plurality of sub-pixel points are distributed in a matrix, and the minimum repeating units of the plurality of sub-pixel points are arranged in RGB, RGBG, RGBW or CMYW. Wherein R, G, B, C, M, Y, and W are red sub-pixel dots, green sub-pixel dots, blue sub-pixel dots, cyan sub-pixel dots, magenta sub-pixel dots, yellow sub-pixel dots, and white sub-pixels, respectively. The color filter is not disposed on the pixel and the white sub-pixel.
The color display device according to any one of claims 1 to 12, wherein the color display device has a plurality of pixel points, wherein some or all of the pixel points are color pixel points, and each of the pixel points includes 2 to 9 adjacent sub-pixel points, all the sub-pixel points corresponding to each color pixel point are provided with color filters of the same color, the plurality of pixel points are distributed in a matrix, and a plurality of pixel points The minimum repeating unit is arranged in RGB, RGBG, RGBW or CMYW, where R, G, B, C, M, Y, W are red pixel, green pixel, blue pixel, cyan pixel, magenta The pixel, the yellow pixel, and the white pixel are not disposed on the sub-pixel corresponding to the white pixel.