CN113611723A - Pixel structure and display device - Google Patents
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- CN113611723A CN113611723A CN202010735602.7A CN202010735602A CN113611723A CN 113611723 A CN113611723 A CN 113611723A CN 202010735602 A CN202010735602 A CN 202010735602A CN 113611723 A CN113611723 A CN 113611723A
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- 210000000746 body region Anatomy 0.000 claims description 35
- 238000007641 inkjet printing Methods 0.000 abstract description 13
- 239000003086 colorant Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002096 quantum dot Substances 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
Abstract
The invention relates to a pixel structure and a display device with the pixel structure, wherein a sub-pixel in the pixel structure is provided with a main body area and at least one drainage convex area, and the drainage convex area of the sub-pixel is positioned at the edge of the main body area and protrudes towards the adjacent sub-pixel with the same color. When the ink-jet printing process is carried out, the drainage bulge area can be used as a drainage channel, so that when ink drops fall into the pixel pit, the ink drops flow to the bulge due to the spreading effect of the ink drops, and overflow of the ink drops to other directions is reduced, thereby reducing liquid drop bridging with adjacent non-homochromatic sub-pixels, and reducing or eliminating the problem of color mixing among the sub-pixels with different colors.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a pixel structure and a display device.
Background
In the display field, liquid crystal display panels and organic self-luminous display panels are two common display technologies. Full-color display of the display panel is one of the technical keys. Common full-color display technologies include RGB juxtaposition, color filter method, and color conversion method.
In a conventional red, green and blue (RGB) standard three-color arrangement pixel structure, if higher resolution display is to be achieved, the area size of a sub-pixel is required to be smaller, and more pixels are required. Under the condition that the size of the display panel is limited, in order to realize higher-resolution display of the panel, at present, a new pixel arrangement structure is developed more, or a sub-pixel rendering mode is combined to improve the virtual resolution of the display panel, so as to achieve a high-resolution display effect.
For the inkjet printing process, limited by the printing precision of the inkjet printing apparatus in mass production at present, the high resolution pixel structure arrangement is prone to generate droplet bridging (bridging) between adjacent different color sub-pixels, resulting in the problem of color mixing between different color pixels. In particular, the lateral distributed landing accuracy of the inkjet printing device is lower than the landing accuracy of the central point in the longitudinal direction, that is, the inkjet printing device moves in the lateral direction so that the landing accuracy of ink droplets in the lateral direction is low.
Disclosure of Invention
Therefore, there is a need for a pixel structure and a display device to solve the problem of color mixing between pixels caused by droplet bridging between adjacent sub-pixels of different colors in an inkjet printing process.
One object of the present invention is to provide a pixel structure, which comprises the following scheme:
a pixel structure comprises a plurality of sub-pixels, each sub-pixel is provided with a main body area and at least one drainage convex area, and the drainage convex area of each sub-pixel is positioned at the edge of the main body area and protrudes towards the adjacent sub-pixels with the same color.
In one embodiment, the sub-pixels are divided into a plurality of sub-pixel groups, in the same sub-pixel group, the color of each sub-pixel is the same, and at least one of the drainage convex regions of each sub-pixel protrudes towards the adjacent sub-pixel.
In one embodiment, each of the sub-pixel groups includes at least two sub-pixels arranged in sequence in a horizontal direction, and each of the sub-pixels is distributed in an array;
the types of the sub-pixel groups comprise a first sub-pixel group, a second sub-pixel group and a third sub-pixel group;
a plurality of the first sub-pixel groups are arranged in a horizontal direction to form a first sub-pixel row; a plurality of the second sub-pixel groups are arranged in a horizontal direction to form a second sub-pixel row, and a plurality of the third sub-pixel groups are arranged in a horizontal direction to form a third sub-pixel row; the first sub-pixel row, the second sub-pixel row and the third sub-pixel row are sequentially and alternately arranged in the longitudinal direction; or, the second sub-pixel group and the third sub-pixel group are alternately arranged in the horizontal direction to form a mixed sub-pixel row, and the first sub-pixel row and the mixed sub-pixel row are sequentially and alternately arranged in the vertical direction.
In one embodiment, any one of the sub-pixels in the sub-pixel group has a drainage convex region protruding towards the sub-pixel in another sub-pixel group which is adjacent and has the same color.
In one embodiment, in the longitudinal direction, the two outermost pixel rows are both the first sub-pixel row.
In one embodiment, the drainage convex region of the sub-pixel is connected with the drainage convex region of another sub-pixel which is adjacent and has the same color.
In one embodiment, the drainage convex regions of two adjacent sub-pixels with the same color are separated by a first pixel defining layer, the body regions of two adjacent sub-pixels are separated by a second pixel defining layer, and the thickness of the first pixel defining layer is smaller than that of the second pixel defining layer.
In one embodiment, the first pixel defining layer has a thickness of 50 to 600nm, and the second pixel defining layer has a thickness of 500 to 2000 nm.
In one embodiment, the body region is polygonal, circular, elliptical or fan shaped.
In one embodiment, the area ratio of the main body area to the drainage convex area is (3-50): 1.
Another object of the present invention is to provide a display device, which is configured as follows:
a display device having the pixel structure of any of the above embodiments.
Compared with the prior art, the pixel structure and the display device have the following beneficial effects:
the pixel structure comprises a sub-pixel, a main body area and at least one drainage convex area, wherein the drainage convex area of the sub-pixel is in a convex shape positioned at the edge of the main body area and protrudes towards the adjacent sub-pixel with the same color. When the ink-jet printing process is carried out, the drainage bulge area can be used as a drainage channel, so that when ink drops fall into the pixel pit, the ink drops flow to the bulge due to the spreading effect of the ink drops, and overflow of the ink drops to other directions is reduced, thereby reducing liquid drop bridging with adjacent non-homochromatic sub-pixels, and reducing or eliminating the problem of color mixing among the sub-pixels with different colors.
Drawings
Fig. 1 is a schematic structural diagram of a pixel structure of embodiment 1;
FIG. 2 is a schematic diagram of a sub-pixel in the pixel structure shown in FIG. 1;
fig. 3 is a schematic structural diagram of a pixel structure according to embodiment 2;
fig. 4 is a schematic structural diagram of a pixel structure according to embodiment 3;
fig. 5 is a schematic structural diagram of a pixel structure of embodiment 4;
fig. 6 is a schematic structural diagram of a pixel structure in embodiment 5.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In the description of the present invention, it is to be understood that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that the terms "transverse" and "longitudinal" as used herein refer to two perpendicular directions, and the term "transverse" or "longitudinal" does not refer to a specific direction.
Referring to fig. 1 and fig. 2, a pixel structure 10 includes a plurality of sub-pixels 100. It is understood that the sub-pixels 100 can be divided into a plurality of sub-pixels according to the different colors of the emitted light, such as a red sub-pixel, a green sub-pixel, a blue sub-pixel, etc., and the sub-pixels 100 of the plurality of colors are arranged in a specific manner to form the pixel structure 10 that can meet the display requirement.
Specifically, as shown in fig. 2, in the pixel structure 10 of the present invention, the sub-pixel 100 has a main body region 101 and at least one current guiding protrusion region 102. The current-guiding convex region 102 of the sub-pixel 100 is located at the edge of the body region 101 and protrudes towards the adjacent sub-pixel 100 with the same color.
When the pixel structure 10 is used in an inkjet printing process, the drainage protrusion area 102 can serve as a drainage channel, so that when ink drops fall into a pixel pit, the ink drops flow to the protrusion due to spreading of the ink drops, and overflow of the ink drops to other directions is reduced, thereby reducing bridging of the ink drops with adjacent non-same-color sub-pixels 100, and reducing or eliminating the problem of color mixing between sub-pixels 100 of different colors.
Because the drainage convex area 102 protrudes towards the adjacent sub-pixels 100 with the same color, under the condition that the two adjacent sub-pixels 100 have the same color, the problem of bridging of ink drops has little influence on the film forming of each functional layer, and the sub-pixels 100 with the same color do not have the condition of color mixing.
In addition, because the ink tends to spread to the drainage channel, and the area of the drainage channel is relatively small, the ink volatilization speed is relatively high, so that the speed of the ink flowing to the edge of the pixel in the drying process is reduced, the edge accumulation phenomenon of a luminous functional layer can be reduced to a certain extent, and the film forming uniformity is improved.
In one example, the shape of the body region 101 of the sub-pixel 100 may be, but is not limited to, a polygon, a circle, an ellipse, or a fan. Wherein the polygon may be, but is not limited to, a triangle, a quadrilateral, a pentagon, a hexagon, etc. In addition, the body regions may or may not be identical in shape.
In the specific example shown in fig. 1, the body regions 101 of the sub-pixels 100 are each rectangular in shape. In other examples, the shape and area of the sub-pixels 100 may be different.
In one example, the ratio of the area of the main body region 101 to the area of the drainage protrusion region 102 is (3-50): 1. Further, in one example, the area ratio of the main body region 101 to the drainage convex region 102 is (10-40): 1. In some specific examples, the ratio of the area of the body region 101 to the drainage protrusion region 102 is 5:1, 20:1, 30:1, 40: 1.
In one example, the plurality of sub-pixels 100 is divided into a plurality of sub-pixel groups. In the same sub-pixel group, the sub-pixels 100 have the same color, that is, a plurality of sub-pixels 100 of the same color form one sub-pixel group. At least one of the current-guiding convex regions 102 of each sub-pixel 100 is convex toward the adjacent sub-pixel 100. One sub-pixel group is composed of a plurality of sub-pixels 100 with the same color and close to each other, and in the ink-jet printing process, one sub-pixel group can be printed by ink-jet printing at one time, namely, the ink-jet printing is simultaneously completed by each sub-pixel 100 in one sub-pixel group, so that the precision requirement of production equipment can be reduced, and high-resolution display can be obtained. The at least one drainage protrusion 102 of each sub-pixel 100 protrudes toward the adjacent sub-pixels 100 in the same sub-pixel group, which can promote the deposition of ink in each sub-pixel 100 in the same sub-pixel group, and reduce the flow of ink toward the adjacent sub-pixel groups of different colors.
Further, as shown in fig. 1, in one example, each sub-pixel group includes at least two sub-pixels 100 arranged in sequence in the horizontal direction, and each sub-pixel 100 is distributed in an array. The types of the sub-pixel groups include a first sub-pixel group 110, a second sub-pixel group 120, and a third sub-pixel group 130. In the present invention, the color of each sub-pixel 100 in the first sub-pixel group 110 is the same, the color of each sub-pixel 100 in the second sub-pixel group 120 is the same, the color of each sub-pixel 100 in the third sub-pixel group 130 is the same, and the colors of the first sub-pixel group 110, the second sub-pixel group 120 and the third sub-pixel group 130 are different.
In the example shown in fig. 1 and 3, a plurality of first subpixel groups 110 are arranged in the lateral direction to constitute a first subpixel row. The second subpixel groups 120 and the third subpixel groups 130 are alternately arranged in the lateral direction to constitute a mixed subpixel row. The first sub-pixel rows and the mixed sub-pixel rows are sequentially and alternately arranged in the longitudinal direction.
In the example shown in fig. 4, 5 and 6, a plurality of first subpixel groups 110 are arranged in the lateral direction to constitute a first subpixel row. The plurality of second subpixel groups 120 are arranged in a horizontal direction to constitute a second subpixel row. The plurality of third subpixel groups 130 are arranged in a horizontal direction to form a third subpixel row. The first sub-pixel rows, the second sub-pixel rows and the third sub-pixel rows are sequentially and alternately arranged in the longitudinal direction.
The pixel arrangement in the above example can reduce bridging of ink droplets in the lateral direction to solve the problem of low accuracy of landing of ink droplets in the lateral direction when the inkjet printing apparatus moves in the lateral direction.
As shown in fig. 4, in one example, any one of the sub-pixels 100 in the sub-pixel group has a drainage convex region 102 protruding towards the sub-pixel 100 in another sub-pixel group adjacent to and having the same color. Thus, the problem of ink drop bridging color mixing can be solved more effectively.
In one example, in the longitudinal direction, both pixel rows located at the outer side are the first sub-pixel row. Except for the two first sub-pixel rows located at the outermost side in the longitudinal direction, the first sub-pixels 111 in the remaining first sub-pixel rows are used as common pixels, so that the display resolution is improved, and the brightness, the color saturation and the display life of the corresponding color of the first sub-pixels 111 can be improved.
In one example, the first sub-pixel group 110 is a blue sub-pixel group, the second sub-pixel group 120 is a green sub-pixel group, and the third sub-pixel group 130 is a red sub-pixel group.
As shown in fig. 1, in one example, the drainage convex region 102 of a sub-pixel 100 is connected with the drainage convex region 102 of another sub-pixel 100 which is adjacent and has the same color, so as to facilitate the drainage of ink between two adjacent sub-pixels 100 which have the same color.
In one example, the drainage convex regions 102 of two adjacent sub-pixels 100 with the same color are separated by a first pixel defining layer, and the body regions 101 of two adjacent sub-pixels 100 are separated by a second pixel defining layer. In this example, the thickness of the first pixel defining layer is less than the thickness of the second pixel defining layer. The height of the second pixel defining layer is higher, which aims to reduce the ink overflow to the pixel pits of the sub-pixels 100 with different colors, and the height of the first pixel defining layer is lower, which is beneficial to improving the effect of draining the ink to the adjacent sub-pixels 100 with the same color by the drainage convex area 102, better reducing the overflow of the ink to other directions, and reducing the color mixing problem among the sub-pixels 100 with different colors.
Further, in one example, the first pixel defining layer has a thickness of 50 to 600 nm. In some specific examples, the first pixel defining layer has a thickness of 100nm, 200nm, 300nm, 400 nm.
In one example, the second pixel defining layer has a thickness of 500 to 2000 nm. In some specific examples, the second pixel defining layer has a thickness of 800nm, 1000nm, 1200nm, 1500 nm.
It will be appreciated that the width of the first pixel defining layer is less than the width of the second pixel defining layer.
Further, the present invention also provides a display device having the pixel structure 10 of any of the above examples.
In one example, the display device is an organic electroluminescent device (OLED) or a quantum dot light emitting device (QLED).
Specific examples are provided below to further illustrate the pixel structure 10 of the present invention.
Example 1
As shown in fig. 1, the pixel structure 10 of the present embodiment includes a first sub-pixel group 110, a second sub-pixel group 120, and a third sub-pixel group 130. The first subpixel group 110 includes two first subpixels 111 arranged in a lateral direction, the second subpixel group 120 includes two second subpixels 121 arranged in a lateral direction, and the third subpixel group 130 includes two third subpixels 131 arranged in a lateral direction.
The plurality of first subpixel groups 110 are arranged in a lateral direction to constitute a first subpixel row. The second subpixel groups 120 and the third subpixel groups 130 are alternately arranged in the lateral direction to constitute a mixed subpixel row. The first subpixel rows and the mixed subpixel rows are alternately arranged in the longitudinal direction. The sub-pixels 100 in the pixel structure 10 are distributed in an array.
The first sub-pixel group 110 and the second sub-pixel group 120 are alternately arranged in the longitudinal direction to constitute a first mixed pixel column. The first sub-pixel group 110 and the third sub-pixel group 130 are alternately arranged in the longitudinal direction to constitute a second mixed pixel column. The first mixed pixel columns and the second mixed pixel columns are alternately arranged in a lateral direction.
Each sub-pixel 100 has a body region 101 and a current-guiding protrusion region 102. The main body region 101 is rectangular, and the drainage protrusion region 102 is a small protrusion located at the edge of the main body region 101 and also has a rectangular shape. The current-guiding convex region 102 of each sub-pixel 100 protrudes towards the adjacent sub-pixels 100 in the same sub-pixel group, i.e. protrudes in the lateral direction, and the current-guiding convex regions 102 of two sub-pixels 100 in the same sub-pixel group are connected towards one end far away from the respective main body region 101.
In the present embodiment, the repeating unit of the pixel structure 10 is as shown in fig. 1.
In the present embodiment, the four sub-pixels 100 arranged in two rows and two columns include a first sub-pixel 111 in each of the two first sub-pixel groups 110, a second sub-pixel 121 in each of the two second sub-pixel groups 120, and a third sub-pixel 131 in each of the three sub-pixel groups 130, and the four sub-pixels 100 arranged in two rows and two columns may form a pixel unit, as indicated by 150 in the figure.
Example 2
As shown in fig. 3, the pixel structure 10 of the present embodiment includes a first sub-pixel group 110, a second sub-pixel group 120, and a third sub-pixel group 130. The first subpixel group 110 includes two first subpixels 111 arranged in a lateral direction, the second subpixel group 120 includes two second subpixels 121 arranged in a lateral direction, and the third subpixel group 130 includes two third subpixels 131 arranged in a lateral direction.
The plurality of first subpixel groups 110 are arranged in a lateral direction to constitute a first subpixel row. The second subpixel groups 120 and the third subpixel groups 130 are alternately arranged in the lateral direction to constitute a mixed subpixel row. The first subpixel rows and the mixed subpixel rows are alternately arranged in the longitudinal direction. The sub-pixels 100 in the pixel structure 10 are distributed in an array.
This example differs from example 1 in that: in the longitudinal direction, two first subpixels 111 in one first subpixel group 110 correspond to one second subpixel 121 and one third subpixel 131 in another pixel row, respectively.
Each sub-pixel 100 has a body region 101 and a current-guiding protrusion region 102. The main body region 101 is rectangular, and the drainage protrusion region 102 is a small protrusion located at the edge of the main body region 101 and also has a rectangular shape. The current-guiding convex region 102 of each sub-pixel 100 protrudes towards the adjacent sub-pixels 100 in the same sub-pixel group, i.e. protrudes in the lateral direction, and the current-guiding convex regions 102 of two sub-pixels 100 in the same sub-pixel group are connected towards one end far away from the respective main body region 101.
In the present embodiment, the repeating unit 1 and the repeating unit 2 of the pixel structure 10 are as shown in fig. 3.
In the present embodiment, two rows and two columns of adjacent four sub-pixels 100 include two first sub-pixels 111 in one first sub-pixel group 110, one second sub-pixel 121 in one second sub-pixel group 120, and one third sub-pixel 131 in one third sub-pixel group 130, and the two rows and two columns of adjacent four sub-pixels 100 may form a pixel unit, as indicated by 160.
Example 3
As shown in fig. 4, the pixel structure 10 of the present embodiment includes a first sub-pixel group 110, a second sub-pixel group 120, and a third sub-pixel group 130. The first subpixel group 110 includes two first subpixels 111 arranged in a lateral direction, the second subpixel group 120 includes two second subpixels 121 arranged in a lateral direction, and the third subpixel group 130 includes two third subpixels 131 arranged in a lateral direction.
The plurality of first subpixel groups 110 are arranged in a lateral direction to constitute a first subpixel row. The plurality of second subpixel groups 120 are arranged in a horizontal direction to constitute a second subpixel row. The plurality of third subpixel groups 130 are arranged in a horizontal direction to form a third subpixel row. The first subpixel rows, the second subpixel rows, and the third subpixel rows are alternately arranged in the longitudinal direction. The sub-pixels 100 in the pixel structure 10 are distributed in an array.
The first subpixel group 110, the second subpixel group 120, and the third subpixel group 130 are alternately arranged in the longitudinal direction. In the longitudinal direction, the two pixel rows located at the outermost side are both the first sub-pixel rows.
In particular, in the present embodiment, the sub-pixels 100 located at the outermost sides in the lateral direction have the body region 101 and one drainage convex region 102, and the remaining sub-pixels 100 have the body region 101 and two drainage convex regions 102. The main body region 101 is rectangular, and the drainage protrusion region 102 is a small protrusion located at the edge of the main body region 101 and also has a rectangular shape. The drainage convex region 102 of each sub-pixel 100 protrudes toward the sub-pixels 100 adjacent in the same sub-pixel group, and the drainage convex regions 102 of the remaining sub-pixels 100, except for the sub-pixels 100 located at the outermost sides in the lateral direction, protrude toward the sub-pixels 100 in the sub-pixel group adjacent in the lateral direction. The current-guiding convex regions 102 of two adjacent sub-pixels 100 are connected to the end far away from the respective body regions 101.
In the present embodiment, the repeating unit of the pixel structure 10 is as shown in fig. 4.
In the present embodiment, four sub-pixels 100 arranged in four rows and one column include a first sub-pixel 111 in each of two first sub-pixel groups 110, a second sub-pixel 121 in each of two second sub-pixel groups 120, and a third sub-pixel 131 in each of three sub-pixel groups 130, and the four sub-pixels 100 arranged in four rows and one column may constitute a pixel unit, as indicated by 170. Wherein, except two first sub-pixel rows located at the outermost side in the longitudinal direction, the first sub-pixels 111 in the remaining first sub-pixel rows are used as the common pixels, as identified by 107 in the figure. Therefore, the display resolution is improved, and the brightness, the color saturation and the display life of the corresponding color of the first sub-pixel 111 can be improved.
Example 4
As shown in fig. 5, the pixel structure 10 of the present embodiment includes a first sub-pixel group 110, a second sub-pixel group 120, and a third sub-pixel group 130. The first subpixel group 110 includes two first subpixels 111 arranged in a lateral direction, the second subpixel group 120 includes two second subpixels 121 arranged in a lateral direction, and the third subpixel group 130 includes two third subpixels 131 arranged in a lateral direction.
The plurality of first subpixel groups 110 are arranged in a lateral direction to constitute a first subpixel row. The plurality of second subpixel groups 120 are arranged in a horizontal direction to constitute a second subpixel row. The plurality of third subpixel groups 130 are arranged in a horizontal direction to form a third subpixel row. The first subpixel rows, the second subpixel rows, and the third subpixel rows are alternately arranged in the longitudinal direction. The sub-pixels 100 in the pixel structure 10 are distributed in an array.
The first subpixel group 110, the second subpixel group 120, and the third subpixel group 130 are alternately arranged in the longitudinal direction. In the longitudinal direction, the two pixel rows located at the outermost side are both the first sub-pixel rows.
Each sub-pixel 100 has a body region 101 and a current-guiding protrusion region 102. The main body region 101 is rectangular, and the drainage protrusion region 102 is a small protrusion located at the edge of the main body region 101 and also has a rectangular shape. The current-guiding convex region 102 of each sub-pixel 100 protrudes towards the adjacent sub-pixels 100 in the same sub-pixel group, i.e. protrudes in the lateral direction, and the current-guiding convex regions 102 of two sub-pixels 100 in the same sub-pixel group are connected towards one end far away from the respective main body region 101.
In the present embodiment, the repeating unit of the pixel structure 10 is as shown in fig. 5.
In the present embodiment, four sub-pixels 100 arranged in four rows and one column include a first sub-pixel 111 in each of two first sub-pixel groups 110, a second sub-pixel 121 in each of two second sub-pixel groups 120, and a third sub-pixel 131 in each of three sub-pixel groups 130, and the four sub-pixels 100 arranged in four rows and one column may constitute a pixel unit, as indicated by 180 in the figure. In which, except for the two first sub-pixel rows located at the outermost side in the longitudinal direction, the first sub-pixels 111 in the remaining first sub-pixel rows are used as the common pixels, as indicated by 108 in the figure. Therefore, the display resolution is improved, and the brightness, the color saturation and the display life of the corresponding color of the first sub-pixel 111 can be improved.
Example 5
As shown in fig. 6, the pixel structure 10 of the present embodiment includes a first sub-pixel group 110, a second sub-pixel group 120, and a third sub-pixel group 130. The first subpixel group 110 includes two first subpixels 111 arranged in a lateral direction, the second subpixel group 120 includes two second subpixels 121 arranged in a lateral direction, and the third subpixel group 130 includes two third subpixels 131 arranged in a lateral direction.
The plurality of first subpixel groups 110 are arranged in a lateral direction to constitute a first subpixel row. The plurality of second subpixel groups 120 are arranged in a horizontal direction to constitute a second subpixel row. The plurality of third subpixel groups 130 are arranged in a horizontal direction to form a third subpixel row. The first subpixel rows, the second subpixel rows, and the third subpixel rows are alternately arranged in the longitudinal direction. The sub-pixels 100 in the pixel structure 10 are distributed in an array.
This example differs from example 4 in that: in the longitudinal direction, two first subpixels 111 in one first subpixel group 110 correspond to one second subpixel 121 and one third subpixel 131 in another pixel row, respectively.
In the longitudinal direction, the two pixel rows located at the outermost side are both the first sub-pixel rows.
Each sub-pixel 100 has a body region 101 and a current-guiding protrusion region 102. The main body region 101 is rectangular, and the drainage protrusion region 102 is a small protrusion located at the edge of the main body region 101 and also has a rectangular shape. The current-guiding convex region 102 of each sub-pixel 100 protrudes towards the adjacent sub-pixels 100 in the same sub-pixel group, i.e. protrudes in the lateral direction, and the current-guiding convex regions 102 of two sub-pixels 100 in the same sub-pixel group are connected towards one end far away from the respective main body region 101.
In the present embodiment, the repeating unit 1 and the repeating unit 2 of the pixel structure 10 are as shown in fig. 6.
In the present embodiment, four sub-pixels 100 arranged in four rows and one column include a first sub-pixel 111 in each of two first sub-pixel groups 110, a second sub-pixel 121 in each of two second sub-pixel groups 120, and a third sub-pixel 131 in each of three sub-pixel groups 130, and the four sub-pixels 100 arranged in four rows and one column may constitute a pixel unit, as indicated by 190. In addition to the two first sub-pixel rows located at the outermost sides in the longitudinal direction, the first sub-pixels 111 in the remaining first sub-pixel rows are used as the common pixels, as indicated by 109 in the figure, which is favorable for improving the display resolution, and can improve the brightness, the color saturation and the display life of the corresponding color of the first sub-pixels 111.
In the pixel structure 10 and the display device having the pixel structure 10, the sub-pixel 100 in the pixel structure 10 has a main body region 101 and at least one current-guiding protrusion region 102, and the current-guiding protrusion region 102 is a protrusion located at the edge of the main body region 101 and protrudes toward the adjacent sub-pixels 100 with the same color. When the ink-jet printing process is carried out, the drainage convex area 102 can be used as a drainage channel, so that when ink drops fall into the pixel pits, the ink drops flow to the convex part due to the spreading effect of the ink drops, and overflow of the ink drops to other directions is reduced, thereby reducing liquid drop bridging with adjacent non-homochromatic sub-pixels 100, and reducing or eliminating the problem of color mixing among the sub-pixels 100 with different colors.
In addition, because the ink tends to spread to the drainage channel, and the area of the drainage channel is relatively small, the ink volatilization speed is relatively high, so that the speed of the ink flowing to the edge of the pixel in the drying process is reduced, the edge accumulation phenomenon of a luminous functional layer can be reduced to a certain extent, and the film forming uniformity is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A pixel structure is characterized in that the pixel structure comprises a plurality of sub-pixels, each sub-pixel is provided with a main body area and at least one drainage convex area, and the drainage convex areas of the sub-pixels are located at the edge of the main body area and are convex towards adjacent sub-pixels with the same color.
2. The pixel structure according to claim 1, wherein a plurality of the sub-pixels are divided into a plurality of sub-pixel groups, each of the sub-pixels has the same color in the same sub-pixel group, and at least one of the drainage protrusion areas of each of the sub-pixels protrudes toward an adjacent sub-pixel.
3. The pixel structure according to claim 2, wherein each of the sub-pixel groups comprises at least two sub-pixels arranged in sequence in a lateral direction, and each of the sub-pixels is arranged in an array;
the types of the sub-pixel groups comprise a first sub-pixel group, a second sub-pixel group and a third sub-pixel group;
a plurality of the first sub-pixel groups are arranged in a horizontal direction to form a first sub-pixel row; a plurality of the second sub-pixel groups are arranged in a horizontal direction to form a second sub-pixel row, and a plurality of the third sub-pixel groups are arranged in a horizontal direction to form a third sub-pixel row; the first sub-pixel row, the second sub-pixel row and the third sub-pixel row are sequentially and alternately arranged in the longitudinal direction; or, the second sub-pixel group and the third sub-pixel group are alternately arranged in the horizontal direction to form a mixed sub-pixel row, and the first sub-pixel row and the mixed sub-pixel row are sequentially and alternately arranged in the vertical direction.
4. The pixel structure according to claim 3, wherein any one of the sub-pixels in the sub-pixel group has a drainage protrusion area protruding towards the sub-pixel in another sub-pixel group adjacent to and having the same color.
5. The pixel structure according to claim 3, wherein in a longitudinal direction, two pixel rows located at an outermost side are both the first sub-pixel row.
6. The pixel structure according to any one of claims 1 to 5, wherein the drainage protrusion of the sub-pixel is connected to a drainage protrusion of another sub-pixel adjacent to the other sub-pixel and having the same color.
7. The pixel structure according to claim 6, wherein the drainage protrusion areas of two adjacent sub-pixels with the same color are separated by a first pixel defining layer, and the body areas of two adjacent sub-pixels are separated by a second pixel defining layer, and the thickness of the first pixel defining layer is smaller than that of the second pixel defining layer.
8. The pixel structure according to claim 7, wherein the first pixel defining layer has a thickness of 50 to 600nm, and the second pixel defining layer has a thickness of 500 to 2000 nm.
9. The pixel structure according to any one of claims 1 to 5, 7 and 8, wherein the shape of the body region is a polygon, a circle, an ellipse or a sector; and/or the presence of a gas in the gas,
the area ratio of the main body area to the drainage convex area is (3-50): 1.
10. A display device having a pixel structure according to any one of claims 1 to 9.
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