Electronic paper with edge compensation pixel and display device

Abstract

The utility model discloses electronic paper with edge compensation pixels and a display device. The electronic paper comprises a normal display unit and an edge compensation display unit, the normal display unit comprises one or more than two normal display pixels; the normal display pixels are rectangular, the lengths of the normal display pixels are equal, and the widths of the normal display pixels are equal; the edge compensation display unit comprises at least one edge compensation pixel; the shape of the edge compensation display unit is equal to that of a normal display unit which is cut by one, two or three right angles. The electronic paper with the edge compensation pixels is designed, through the structure and combination of the edge compensation pixel units, the electronic paper is more suitable for being displayed 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] The present application belongs to the technical field of display, and particularly relates to an electronic paper comprising edge compensation pixels and a display device. BACKGROUND

[0002] An electronic paper ink screen is a display screen made of electrophoretic display technology, and is driven by driving IC chips to continuously apply driving waveforms to the electric field of each pixel point to drive electronic paper particles to achieve the effect of displaying images. 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 stop signs.

[0003] In the prior art, most electronic paper module products are square. With the development of more application scenarios, such as Figure 7 As shown in the figure, such as word cards, electronic paper mobile phone cases and other scenarios, the four-corner arc display interface is more beautiful. However, there is a clear sawtooth phenomenon at the boundary between the display area and the border area, as shown in Figure 8 which affects the beauty and visual effect of the display and needs to be optimized.

[0004] Definition: EPD is the abbreviation of English "electronic paper display", which means electronic paper display.

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

[0006] ITO is the abbreviation of English "Indium Tin Oxide", which means indium tin oxide. In the present application, the electronic paper ITO refers to the conductive film layer material of the transparent conductive film shielding glass, which is mainly ITO (indium tin oxide semiconductor) film. SUMMARY

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

[0008] The technical solution of the application for solving the above technical problem is an electronic paper with edge compensation pixels, comprising a normal display unit and an edge compensation display unit; the normal display unit comprises one or more than two normal display pixels; the normal display pixel is rectangular, the length of the normal display pixel is equal, and the width of the normal display pixel is equal; the edge compensation display unit comprises at least one edge compensation pixel; the edge compensation display unit is equal in shape to the normal display unit with one, two or three right angles cut off.

[0009] The above edge compensation display unit is not powered and does not display.

[0010] The above edge compensation display unit can be powered and displayed.

[0011] The ITO electrode layer of the above edge compensation pixel is in electrical signal communication with the ITO electrode layer of the surrounding normal display pixel, and the ITO electrode layer of the edge compensation pixel is powered by the ITO electrode layer of the surrounding normal display pixel.

[0012] The ITO electrode layer of the adjacent edge compensation pixel of the adjacent edge compensation display unit is in electrical signal communication, and the ITO electrode layer of the edge compensation pixel is powered by the ITO electrode layer of the surrounding normal display pixel.

[0013] The ITO electrode layer of the edge compensation pixel of the adjacent edge compensation display unit is in electrical signal communication, and the ITO electrode layer of the plurality of edge compensation pixels is powered by the ITO electrode of one edge compensation pixel.

[0014] In the edge compensation display unit, the area of the adjacent edge compensation pixel is SX, and the display area of one normal display pixel is S0; if S0<SX<2S0, the adjacent edge compensation pixels are in electrical communication.

[0015] In the edge compensation display unit, the area of the edge compensation display unit is SX, and the display area of one normal display pixel is S0; if 2S0<SX, the area of the edge compensation display unit is divided into adjacent edge compensation pixels.

[0016] The length of the above edge compensation pixel is equal to the length of the above normal display pixel, and the length direction is correspondingly arranged; or the width of the above edge compensation pixel is equal to the width of the above normal display pixel, and the width direction is correspondingly arranged.

[0017] The technical solution of the application for solving the above technical problem can also be an electronic paper display device comprising the above electronic paper with edge compensation pixels.

[0018] One of the beneficial effects of the technical solution in the application is that the edge compensation pixel unit makes the pixel structure more suitable for edge display, improves the effect of edge display, and reduces the sawtooth effect of edge display.

[0019] One of the beneficial effects of the technical solutions in the present application is that the edge compensation display unit is equivalent to a normal display unit with one, two or three right angles cut off in shape, which is very suitable for the pixel combination splicing of the edge. It is flexible and adaptive to different application scenarios.

[0020] One of the beneficial effects of the technical solutions in the present application is that the pixel electrodes of the adjacent edge compensation pixels share power supply, which can reduce the complexity of edge driving design, and at the same time meet the requirements of edge display.

[0021] One of the beneficial effects of the technical solutions in the present application is that the ITO electrode layer of the edge compensation pixel is powered by the ITO electrode layer of the normal display pixel in the periphery, which can reduce the complexity of edge driving design, and at the same time meet the requirements of edge display.

[0022] One of the beneficial effects of the technical solutions in the present application is that the ITO electrode layers of the edge compensation pixels of the adjacent edge compensation display units are in electrical signal communication, and the ITO electrode layers of multiple edge compensation pixels are powered by the ITO electrode of one edge compensation pixel. It can reduce the complexity of edge driving design, and at the same time meet the requirements of edge display.

[0023] The 6th beneficial effect of the technical solutions in the present application is that the area of the adjacent edge compensation pixel is SX, and the display area of one normal display pixel is S0; if S0<SX<2S0, the adjacent edge compensation pixels are merged and electrically connected, which can make the compensation pixel area cover the edge as much as possible, reduce the sawtooth, improve the effect, and at the same time reduce the complexity of edge driving design.

[0024] The 7th beneficial effect of the technical solutions in the present application is that in the edge compensation display unit, the area of the edge compensation display unit is SX, and the display area of one normal display pixel is S0; if 2S0<SX, the area of the edge compensation display unit is divided into adjacent edge compensation pixels, which can make the compensation pixel area cover the edge as much as possible, reduce the sawtooth, and improve the effect.

[0025] The 8th beneficial effect of the technical solutions in the present application is that the length of the above-mentioned edge compensation pixel is equal to the length of the above-mentioned normal display pixel, and they are arranged in the length direction; or the width of the above-mentioned edge compensation pixel is equal to the width of the above-mentioned normal display pixel, and they are arranged in the width direction. It can be flexible and adaptive to different application scenarios.

[0026] One of the beneficial effects of the technical solutions in the present application is that the display device has good edge display effect. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is an electronic paper with edge compensation pixels Figure 1 ;

[0028] Figure 2 is an electronic paper with edge compensation pixelsFigure 2 ;

[0029] Figure 3 is a schematic of electronic paper with edge compensation pixels Figure 3 ;

[0030] Figure 4 is a schematic of electronic paper with edge compensation pixels Figure 4 ;

[0031] Figure 5 is a schematic of electronic paper with edge compensation pixels Figure 5 ;

[0032] Figure 6 is a schematic of electronic paper with edge compensation pixels Figure 6 ;

[0033] Figure 7 is a schematic of electronic paper with edge compensation pixels

[0034] Figure 8 is a partial enlarged view of the dashed box in Figure 7 ;

[0035] Figure 9 is a partial enlarged view of the dashed box in Figure 7 ;

[0036] Figure 10 is a schematic of electronic paper with edge compensation pixels. DETAILED DESCRIPTION

[0037] The embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

[0038] It should be noted that the following description is merely of the preferred embodiments of the present application and does not impose any limitation on the present application. The description of the preferred embodiments of the present application is merely illustrative of the general principles of the present application. The embodiments described in the present application are merely a part of the embodiments of the present application and are not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the scope of protection of the present application.

[0039] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and technical features numbered with Arabic numerals 1, 2, 3, etc., and "A" and "B" such numbering, are only for the purpose of description, for the convenience of illustration, and do not represent the chronological or spatial sequence relationship; cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", and technical features numbered with Arabic numerals 1, 2, 3, etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "several" is two or more, unless otherwise explicitly specified.

[0040] The electronic paper with a four-corner arc display interface has sawtooth images at the boundary between the display area and the border area, as shown in Figure 7 the dashed box and the partial enlargement Figure 8 and Figure 9 . The arc display interface has obvious edge sawtooth phenomenon, and the display effect is not good. How to improve the display effect of the edge is a technical problem to be solved.

[0041] As shown in Figure 1 , an embodiment of an electronic paper with edge compensation pixels includes a normal display unit 20 and an edge compensation display unit 30; the normal display unit includes one or more than two normal display pixels; the normal display pixels are rectangular, the lengths of the normal display pixels are equal, and the widths of the normal display pixels are equal; the edge compensation display unit includes at least one edge compensation pixel; the edge compensation display unit is equal in shape to the normal display unit with one, two or three right angles cut off.

[0042] As shown in Figure 1 , an embodiment of an electronic paper with edge compensation pixels, the above-mentioned edge compensation display unit is not powered and does not actually display. The step angle of the border arc area is "cut off", and this design can solve the border area sawtooth phenomenon, but the display area sawtooth is still there.

[0043] As shown in Figure 2, in an embodiment of an electronic paper with edge-compensated pixels, the above-mentioned edge-compensation display unit can be powered on for display. The powered-on state can display the color when not powered on. Pixel compensation design is carried out for the stepped area dug out in the border area. For example, Figure 2 As shown, the pixel electrodes in the compensation area are not regular squares and their sizes are inconsistent, which causes difficulties in the design of driving signals.

[0044] Further define the pixel compensation design for the irregular pixel electrodes in the arc area. The pixel compensation rule is that when the pixel ITO area SX of the compensation pixel < S0, it is merged with the normal pixel S0 or multiple adjacent Sx are merged into one compensation pixel. Specifically, the schematic diagram of merging with the normal pixel S0 is as Figure 3 shown. The S0 and S4 of the normal pixel are short-circuited and conducted through pixel ito. The pixel unit above S4 is a dum pixel.

[0045] Merging multiple adjacent Sx into one compensation pixel unit includes conducting multiple (≥2) Sx < S0 pixel units through pixel ito, and one of the pixel units has an ito layer-changing hole for pixel charging and discharging, and the remaining pixel units are dum pixels.

[0046] Merging multiple adjacent Sx into one compensation pixel unit includes that when the pixel ITO area 1S0 ≤ SX ≤ 2S0 of the compensation pixel, it is merged into one compensation pixel unit, as Figure 5 shown, and one of the pixel units has an ito layer-changing hole for pixel charging and discharging, and the remaining pixel units are dum pixels.

[0047] Merging multiple adjacent Sx into one compensation pixel unit includes, as Figure 6 shown, when the pixel ITO area SX of the compensation pixel > 2S0, it is split according to Figure 6 for splitting.

[0048] As Figure 3 , in an embodiment of an electronic paper with edge-compensated pixels, the ITO electrode layer of the above-mentioned edge-compensated pixels is electrically connected to the ITO electrode layer of the surrounding normal display pixels, and the ITO electrode layer of the edge-compensated pixels is powered by the ITO electrode layer of the surrounding normal display pixels. Figure 3 In, S0 is a normal display pixel, S4 is an edge-compensated pixel, and above S4 includes design-redundant dum pixels, and the dum pixels are not powered for display. The normal display pixel S0 and the edge-compensated pixel S4 are adjacent pixels and are merged through ITO short-circuit. That is, only by setting the compensation pixel electrode ito layer-changing hole in the normal display pixel S0 can the pixel area covered by the edge-compensated pixel S4 be driven.

[0049] As Figure 4 and Figure 5In an embodiment of the electronic paper with edge compensation pixels, the ITO electrode layers of adjacent edge compensation pixels of adjacent edge compensation display units are electrically connected, and the ITO electrode layers of the plurality of edge compensation pixels are powered by the ITO electrode of one edge compensation pixel.

[0050] Figure 4 In the embodiment, S0 is a normal display pixel, S4 and S5 are edge compensation pixels, and the dum pixels above S4 and S5 include design redundancy and are not powered for display. The edge compensation pixel S4 and the edge compensation pixel S5 serve as adjacent pixels, the ITO electrode layers of the two are electrically connected, are short-circuited and merged, and jointly serve as a driving object of one pixel. That is, the pixel area covered by the edge compensation pixel S4 and the edge compensation pixel S5 can be driven by only setting the compensation pixel electrode ITO layer hole in one region of the edge compensation pixel S4 or the edge compensation pixel S5. The pixel electrode ITO layer hole is also called an electrode through hole.

[0051] As Figure 5 In an embodiment of the electronic paper with edge compensation pixels, the ITO electrode layers of adjacent edge compensation pixels of adjacent edge compensation display units are electrically connected. The edge compensation pixel S2 spans two adjacent edge compensation display units, and the edge compensation pixel S2 is electrically connected as a whole ITO electrode layer. The edge compensation pixel S2 can be driven as one pixel, that is, the pixel area covered by the whole edge compensation pixel S2 can be driven by only setting the compensation pixel electrode ITO layer hole in one region. In an embodiment not shown in some drawings, the ITO electrode layers of the edge compensation pixels are powered by the ITO electrode layers of the surrounding normal display pixels.

[0052] As Figure 5 In an embodiment of the electronic paper with edge compensation pixels, in an edge compensation display unit, the areas of adjacent edge compensation pixels are SX, and the display area of one normal display pixel is S0; if S0<SX<2S0, the adjacent edge compensation pixels are electrically connected.

[0053] As Figure 6 In an embodiment of the electronic paper with edge compensation pixels, in an edge compensation display unit, the area of the edge compensation display unit is SX, and the display area of one normal display pixel is S0; if 2S0<SX, the area of the edge compensation display unit is divided into adjacent edge compensation pixels. Figure 6The edge compensation display unit spans an area of four normal display pixels, and the area of the edge compensation display unit has already been greater than twice the area of the normal display pixel, so it is split into two edge compensation pixels, namely edge compensation pixel Sx1 and edge compensation pixel Sx2. The edge compensation pixel Sx1 spans two normal display pixels, and the edge compensation pixel Sx1 is in electrical communication as a whole with the ITO electrode layer, that is, only one compensation pixel electrode ITO layer hole is set in one area to drive the entire pixel area covered by the edge compensation pixel Sx1. The edge compensation pixel Sx2 also spans two normal display pixels, and the edge compensation pixel Sx2 is in electrical communication as a whole with the ITO electrode layer, that is, only one compensation pixel electrode ITO layer hole is set in one area to drive the entire pixel area covered by the edge compensation pixel Sx2.

[0054] As shown in Figures 3 to 6 In an embodiment of the electronic paper with edge compensation pixels, the length of the edge compensation pixel is equal to the length of the normal display pixel, and the length direction corresponds to arrangement; or the width of the edge compensation pixel is equal to the width of the normal display pixel, and the width direction corresponds to arrangement.

[0055] As shown in Figure 10 As shown in

[0056] A display device comprising the above-mentioned electronic paper with edge compensation pixels.

[0057] The present application mainly optimizes the design of TFT from the perspective of sawtooth phenomenon of circular arc, special-shaped or circular hole electronic paper products. The reason for the sawtooth phenomenon is that the pixel arrangement in the circular arc corner area appears a "step", causing the pixel electrode ITO of the border area to appear a "step" around the display area, as shown in Figure 8 When the border area and the display area have a significant color difference, the sawtooth phenomenon is obvious.

[0058] According to the cause of the sawtooth phenomenon, the present application provides various optimization designs, and the sawtooth phenomenon of the order area and the display area is improved by the compensation pixels between the border area and the display area.

[0059] As shown in the above figures, the above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the application description and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electronic paper with edge compensation pixels, characterized in that, a normal display unit and an edge compensation display unit are included; the normal display unit includes one or more than two normal display pixels; the normal display pixels are rectangular, the length of the normal display pixels is equal, and the width of the normal display pixels is equal; the edge compensation display unit includes at least one edge compensation pixel; the edge compensation display unit is equal in shape to the normal display unit with one, two or three right angles cut off. 2.The electronic paper with edge compensation pixels of claim 1, wherein, The edge compensation display unit is not powered and does not display.

3. The electronic paper with edge compensation pixels according to claim 1, characterized in that, The edge compensation display unit can be powered and displayed.

4. The electronic paper with edge compensation pixels according to claim 3, characterized in that, the ITO electrode layer of the edge compensation pixel is in electrical signal communication with the ITO electrode layer of the surrounding normal display pixel, and the ITO electrode layer of the edge compensation pixel is powered by the ITO electrode layer of the surrounding normal display pixel.

5. The electronic paper with edge compensation pixels according to claim 2, characterized in that, the ITO electrode layer of the adjacent edge compensation pixel of the adjacent edge compensation display unit is in electrical signal communication, and the ITO electrode layer of the edge compensation pixel is powered by the ITO electrode layer of the surrounding normal display pixel.

6. The electronic paper with edge compensation pixels according to claim 2, characterized in that, the ITO electrode layer of the edge compensation pixel of the adjacent edge compensation display unit is in electrical signal communication, and the ITO electrode layer of the multiple edge compensation pixels is powered by the ITO electrode of one edge compensation pixel.

7. The electronic paper with edge compensation pixels according to claim 3, characterized in that, in the edge compensation display unit, the area of the adjacent edge compensation pixel is SX, and the display area of one normal display pixel is S0; if S0 < SX < 2S0, the adjacent edge compensation pixels are in electrical communication.

8. The electronic paper with edge compensation pixels according to claim 3, characterized in that, in the edge compensation display unit, the area of the edge compensation display unit is SX, and the display area of one normal display pixel is S0; if 2S0 < SX, the area of the edge compensation display unit is divided into adjacent edge compensation pixels.

9. The electronic paper with edge compensation pixels according to claim 1, characterized in that, the length of the edge compensation pixel is equal to the length of the normal display pixel, and the length direction is arranged correspondingly; or the width of the edge compensation pixel is equal to the width of the normal display pixel, and the width direction is arranged correspondingly.

10. An electronic paper display device, characterized in that, including the electronic paper with edge compensation pixels according to any one of claims 1 to 9.

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