Pixel arrangement structure, display substrate, display device, manufacturing method and mask

Abstract

A pixel arrangement structure, a display substrate, a display device, a manufacturing method and a mask, the pixel arrangement structure includes a first pixel and a second pixel alternately arranged in the row and column directions, both pixels include: a first, a second and a third sub-pixel, three sub-pixels in the same pixel are in a triangle, the second and the third sub-pixels are in the same row, in the first and second pixels adjacent in the row direction, the straight line where the edge of one side of the second and third sub-pixels in the first pixel is parallel to the row direction and away from the first sub-pixel, and the straight line where the edge of one side of the second and third sub-pixels in the second pixel is parallel to the row direction and away from the first sub-pixel are located, respectively, are located on both sides of the first sub-pixel, and the distance from the first sub-pixel to the straight line where the edge of one side of the second and third sub-pixels in the adjacent pixel is parallel to the row direction and away from the first sub-pixel is greater than zero. Compared with the existing pixel structure, the number of sub-pixels in the pixel structure of the present invention is significantly reduced.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a pixel arrangement structure, a display substrate, a display device, a manufacturing method and a mask. Background Art

[0002] The demand for high-resolution displays has increased the difficulty and cost of display device manufacturing, especially in the current AMOLED (active matrix organic light-emitting diode) field, where the manufacturing process of high PPI (pixel density) displays is difficult due to the limitations of FMM (fine metal mask) technology.

[0003] Because, in a pixel composed of conventional stripe RGB sub-pixels, three RGB sub-pixels are arranged within one pixel pitch in a direction perpendicular to the sub-pixel strip direction. When the pixel density is higher than 300ppi, the current FMM process is very difficult to implement. Summary of the invention

[0004] In view of this, the present invention provides a pixel arrangement structure, a display substrate, a display device, a manufacturing method and a mask plate, which are used to solve the problem of high difficulty in manufacturing a high PPI display.

[0005] To solve the above technical problems, the present invention provides a pixel arrangement structure, comprising a plurality of first pixels and a plurality of second pixels, wherein the first pixels and the second pixels are alternately arranged in a row direction and a column direction, and the first pixels and the second pixels each comprise: a first sub-pixel, a second sub-pixel and a third sub-pixel, and in the same pixel, the first sub-pixel, the second sub-pixel and the third sub-pixel are distributed in a triangle, and the second sub-pixel and the third sub-pixel are located in the same row, and in the first pixels and the second pixels adjacent to each other in the row direction, a first straight line on which a side edge of the second sub-pixel and the third sub-pixel in the first pixel is parallel to the row direction and away from the first sub-pixel, and a third straight line on which a side edge of the second sub-pixel and the third sub-pixel in the second pixel is parallel to the row direction and away from the first sub-pixel, are located on both sides of the first sub-pixel, respectively, and a distance from the first sub-pixel to a straight line on which a side edge of the second sub-pixel and the third sub-pixel in the adjacent pixel is parallel to the row direction and away from the first sub-pixel in the adjacent pixel is greater than zero.

[0006] Preferably, in the column direction, the adjacent first pixels and second pixels are mirror-symmetric.

[0007] Preferably, in the same pixel, the first sub-pixel, the second sub-pixel and the third sub-pixel are distributed in an isosceles triangle.

[0008] Preferably, a distance from the first subpixel to a straight line parallel to the row direction and away from a side edge of the first subpixel in the adjacent pixel in the same row of the second subpixel and the third subpixel is smaller than a distance from the first subpixel to a straight line parallel to the row direction and away from a side edge of the first subpixel in the adjacent pixel of the first subpixel.

[0009] Preferably, one side edge of the first sub-pixel parallel to the row direction and close to the second sub-pixel and the third sub-pixel is close to a second straight line, and the second straight line is parallel to the first straight line, located between the first straight line and the third straight line, and has the same distance from the first straight line and the third straight line.

[0010] Preferably, the pixel regions where the first pixel and the second pixel are located are both rectangular.

[0011] Preferably, in the same pixel, the second sub-pixel and the third sub-pixel are located at two ends of one side of the rectangle.

[0012] Preferably, the first sub-pixel, the second sub-pixel and the third sub-pixel are all rectangular.

[0013] Preferably, in the column direction, the adjacent first pixels and second pixels share a first sub-pixel, a second sub-pixel and / or a third sub-pixel.

[0014] Preferably, the first sub-pixel is a green sub-pixel, the second sub-pixel is a red sub-pixel, and the third sub-pixel is a blue sub-pixel.

[0015] The present invention also provides a display substrate, comprising the above pixel arrangement structure.

[0016] Preferably, the display substrate is an OLED display substrate.

[0017] The present invention also provides a display device, comprising the above-mentioned display substrate.

[0018] The present invention also provides a method for manufacturing a display substrate, which is used for manufacturing the above-mentioned display substrate.

[0019] Preferably, the display substrate is an OLED display substrate, and the method comprises:

[0020] The sub-pixels of the OLED display substrate are formed by using an FMM mask plate through an evaporation process. The FMM mask plate includes at least one first opening, and the first opening corresponds to at least two adjacent sub-pixels of the same color.

[0021] The present invention further provides an FMM mask plate for forming the above-mentioned display substrate, wherein the FMM mask plate comprises at least one first opening, and the first opening corresponds to at least two adjacent sub-pixels of the same color.

[0022] The beneficial effects of the above technical solution of the present invention are as follows:

[0023] In the pixel arrangement structure of the present invention, in the row or column direction, within the same pixel pitch, the number of sub-pixels is significantly reduced compared with the existing strip-shaped sub-pixels and their variations, thereby reducing the difficulty of manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural schematic diagram of a pixel arrangement structure according to a first embodiment of the present invention;

[0025] Figure 2 is a structural schematic diagram of a pixel arrangement structure according to a second embodiment of the present invention;

[0026] Figure 3 FIG. 4 is a schematic diagram of a pixel arrangement structure according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0028] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the invention belongs. The words "first", "second" and similar terms used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0029] Embodiment 1

[0030] Please refer to Figure 1 , Figure 1This is a structural schematic diagram of the pixel arrangement structure of embodiment 1 of the present invention, the pixel arrangement structure includes: a plurality of first pixels 10A and a plurality of second pixels 10B, the first pixels 10A and the second pixels 10B are alternately arranged in the row direction and the column direction, and the first pixels 10A and the second pixels 10B each include: a first sub-pixel 11, a second sub-pixel 12 and a third sub-pixel 13.

[0031] In the same pixel, the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 are distributed in a triangle, and the second sub-pixel 12 and the third sub-pixel 13 are located in the same row.

[0032] In the first pixel 10A and the second pixel 10B adjacent in the row direction, a first straight line 21 on which a side edge of the second sub-pixel 12 and the third sub-pixel 13 in the first pixel 10A is parallel to the row direction and away from the first sub-pixel 11 in the first pixel 10A, and a third straight line 23 on which a side edge of the second sub-pixel 12 and the third sub-pixel 13 in the second pixel 10B is parallel to the row direction and away from the first sub-pixel 11 of the second pixel 10B, are located on both sides of the first sub-pixel 11 in the first pixel 10A and the second pixel 10B, respectively, and a distance from the first sub-pixel 11 to the straight line on which a side edge of the second sub-pixel 12 and the third sub-pixel 13 in the adjacent pixel is parallel to the row direction and away from the first sub-pixel 11 in the adjacent pixel is greater than zero.

[0033] from Figure 1 It can be seen that in the row direction, three sub-pixels of different colors are arranged in the two pixel intervals of the same row, and in the column direction, two sub-pixels of the same color are arranged in the two pixel intervals of the same column. Compared with the prior art in which six sub-pixels are arranged in the two pixel intervals of the same row in the row direction and two sub-pixels are arranged in the two pixel intervals of the same column in the column direction, the number of sub-pixels is significantly reduced, thereby reducing the difficulty of production and making it possible to produce a display device with a high PPI (such as a resolution of 500ppi or above).

[0034] In addition, in the same column, only sub-pixels of one color are included, and they are adjacent to each other (see Figure 1 When the sub-pixels in the embodiment of the present invention are formed by the evaporation process, the number of sub-pixels within the same pixel pitch is reduced, and two adjacent sub-pixels within the same elliptical dotted frame can be formed by evaporation using one FMM opening, thereby effectively reducing the number (density) of FMM openings, breaking through the limitation of FMM technology on high-resolution AMOLED, and realizing AMOLED with a resolution of 300ppi or higher.

[0035] At the same time, the pixels in the pixel arrangement structure in the embodiment of the present invention are all Real pixels. Even at a high PPI, the display effect of the graphic image is still relatively clear, which is especially important for the display of certain special graphic images. For example, details such as the hands of an electronic display watch will also appear smooth and sharp.

[0036] from Figure 1 It can be seen that in the above embodiment, in the same column, the adjacent first pixel 10A and second pixel 10B are mirror-symmetrical, that is, the arrangement structure of the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 in the second pixel 10B is mirror-symmetrical to the arrangement structure of the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 in the first pixel 10A.

[0037] Of course, in some other embodiments of the present invention, in the same column, the adjacent first pixel 10A and the second pixel 10B may not be mirror images. For example, the centers of the first sub-pixel 11 in the first pixel 10A and the first sub-pixel 11 in the second pixel 10B may not be on the same straight line.

[0038] In the above embodiment, in the same pixel, the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 are distributed in an isosceles triangle, that is, in the same pixel, the lines connecting the centers of the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 form an isosceles triangle. Of course, the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 may also be distributed in an equilateral triangle.

[0039] In the above embodiment, the distance from the first sub-pixel 11 to the straight line parallel to the row direction and away from the side edge of the first sub-pixel 11 in the adjacent pixel in the same row is smaller than the distance from the first sub-pixel 11 to the straight line parallel to the row direction and away from the side edge of the first sub-pixel 11 in the adjacent pixel in the same row is smaller than the distance from the first sub-pixel 11 to the straight line parallel to the row direction and away from the side edge of the first sub-pixel 11 in the adjacent pixel in which the second sub-pixel 12 and the third sub-pixel 13 are located.

[0040] For example, the distance from the first sub-pixel 11 in the first pixel 10A to the third straight line 23 where the second sub-pixel 12 and the third sub-pixel 13 in the adjacent second pixel 10B in the same row are parallel to the row defense line and away from the side edge of the first sub-pixel 11 in the second pixel 10B is smaller than the distance from the first sub-pixel 11 in the first pixel 10A to the first straight line 21 where the second sub-pixel 12 and the third sub-pixel 13 in the first pixel 10A are parallel to the row direction and away from the side edge of the first sub-pixel 11 in the first pixel 10A.

[0041] That is to say, in the column direction, the distance between the first subpixel in a pixel and the second subpixel and the third subpixel in the pixel where it is located is greater than the distance between the first subpixel and the second subpixel and the third subpixel in the adjacent pixel in the row direction.

[0042] In the above embodiment, in the same pixel, the edge of one side of the first sub-pixel 11 which is parallel to the row direction and close to the second sub-pixel 12 and the third sub-pixel 13 is close to the second straight line 22, and the second straight line 22 is parallel to the first straight line 21, located between the first straight line 21 and the third straight line 23, and has the same distance from the first straight line 21 and the third straight line 23.

[0043] In the above embodiment, the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 are all rectangular. It should be noted that, according to actual production needs, they can also be produced into other shapes, such as circle, triangle, parallelogram, etc., which are not limited in the present invention.

[0044] In the above embodiment, the pixel regions where the first pixel 10A and the second pixel 10B are located are both rectangular. Further preferably, the pixel regions where the first pixel 10A and the second pixel 10B are located are both square. The square pixel regions can make the distribution of sub-pixels more uniform and improve the display quality. It should be noted that according to actual production needs, other shapes can also be made, such as circle, triangle, parallelogram, etc., which are not limited by the present invention.

[0045] In the above embodiment, in a pixel, the first sub-pixel 11 is located in the middle area of ​​the pixel area corresponding to the pixel, and the second sub-pixel 12 and the third sub-pixel 13 are located in the edge area of ​​the pixel area. Preferably, the first sub-pixel 11 is a sub-pixel with a larger brightness image on the pixel, and the second sub-pixel 12 and the third sub-pixel 13 are sub-pixels with a smaller brightness image on the pixel, that is, the influence of the first sub-pixel 11 on the brightness of the pixel where it is located is respectively greater than the influence of the second sub-pixel 12 and the third sub-pixel 13 on the brightness of the pixel where it is located, so that the brightness distribution of the pixel is more uniform, thereby improving the display quality of the display device.

[0046] In the above embodiment, in the same pixel, the second sub-pixel 12 and the third sub-pixel 13 are located at two ends of one side of the rectangle. Preferably, the edges of the second sub-pixel 12 and the third sub-pixel 13 are close to two right-angled sides of one side of the pixel area corresponding to the pixel where the second sub-pixel 12 and the third sub-pixel 13 are located. Of course, in some other embodiments of the present invention, it is not excluded to slightly adjust the position of the second sub-pixel 12 or the third sub-pixel 13.

[0047] In the above embodiment, when the pixel area is a rectangle, in the same pixel, the first sub-pixel 11 is located on the perpendicular bisector of the first side of the second sub-pixel 12 and the third sub-pixel 13 which is parallel to the row direction and away from the edge of the first sub-pixel 11. Preferably, the center of the first sub-pixel 11 is located on the perpendicular bisector.

[0048] In the above embodiment, when the pixel area is rectangular, in the same pixel, the distance between the first sub-pixel 11 and the first side is greater than the distance between the first sub-pixel 11 and the third side (comparison of the first side), and the distance between the first sub-pixel 11 and the first side usually refers to the distance between the center of the first sub-pixel 11 and the first side, and the distance between the first sub-pixel 11 and the third side, similarly, usually refers to the distance between the center of the first sub-pixel 11 and the third side. Under this structure, the first sub-pixel 11 is more uniformly distributed (see Figure 1 The black bold dashed line connected to the first sub-pixel in the figure).

[0049] In the above embodiment, in the same pixel, the edge of the first sub-pixel 11 closest to the first side is close to the perpendicular midline of the second side, and the second side is a side adjacent to the first side. Of course, in some other embodiments of the present invention, the first sub-pixel 11 can also be set at other positions, such as other positions between the perpendicular midline of the second side and the third side.

[0050] Since the human eye is more sensitive to green and less sensitive to red and blue, in the above embodiment, preferably, the first sub-pixel 11 is a green sub-pixel, the second sub-pixel 12 is a red sub-pixel or a blue sub-pixel, and the third sub-pixel 13 is a blue or red sub-pixel. Of course, the possibility of using sub-pixels of other colors is not excluded.

[0051] Embodiment 2

[0052] Please refer to Figure 2 , Figure 2 FIG. 1 is a schematic diagram of a pixel arrangement structure according to a second embodiment of the present invention. Figure 1 The difference of the first embodiment shown is that in the same column, the second sub-pixel 12 and the third sub-pixel 13 in the first pixel 10A and the second pixel 10B adjacent to each other in mirror symmetry are combined into one, driven by the SPR (Sup-Pixel Rendering, sub-pixel rendering) algorithm, and shared by the first pixel 10A and the second pixel 10B. The so-called sharing means that the second sub-pixel 12 in the first pixel 10A and the second pixel 10B is an integrated structure, and the third sub-pixel 13 in the first pixel 10A and the second pixel 10B is an integrated structure. However, in actual display, those skilled in the art can understand that they can be controlled to emit light separately.

[0053] The so-called SPR technology (extended to virtual pixel reconstruction) means that when the display resolution is comparable to the human eye resolution level, the difference in the human eye's resolution of different color sub-pixels can be used to change the conventional red, green, and blue (R, G, B) three-color sub-pixel (sub-pixel) to simply define a pixel (Pixel). By sharing certain position resolution-insensitive color sub-pixels between different pixels, the same pixel resolution performance can be simulated with a relatively small number of sub-pixels, thereby reducing process difficulty and cost.

[0054] In an embodiment of the present invention, the second sub-pixel 12 and the third sub-pixel 13 in the mirror-symmetrically adjacent first pixel 10A and the second pixel 10B located in the same column are combined into one. In some other embodiments of the present invention, one of the second sub-pixel 12 and the third sub-pixel 13 in the mirror-symmetrically adjacent first pixel 10A and the second pixel 10B may be combined into one.

[0055] Embodiment 3

[0056] Please refer to Figure 3 , Figure 3 FIG. 1 is a schematic diagram of a pixel arrangement structure according to a third embodiment of the present invention. Figure 1 The difference of the first embodiment shown is that in the same column, the third sub-pixel 13 in the first pixel 10A and the second pixel 10B adjacent to each other in mirror symmetry is combined into one, driven by the SPR algorithm, and shared by the first pixel 10A and the second pixel 10B.

[0057] Since human eyes are least sensitive to blue, preferably, the third sub-pixel 13 is a blue sub-pixel.

[0058] Of course, in some other embodiments of the present invention, the first sub-pixels in adjacent first pixels and second pixels in the same column may also be shared. For example, Figure 3 The two first sub-pixels in the same elliptical dotted circle.

[0059] An embodiment of the present invention further provides a display substrate, comprising the pixel arrangement structure in any of the above embodiments.

[0060] Preferably, the display substrate is an OLED display substrate.

[0061] An embodiment of the present invention further provides a display device, comprising the above-mentioned display substrate.

[0062] An embodiment of the present invention further provides a method for manufacturing a display substrate, which is used to manufacture the above-mentioned display substrate.

[0063] In an embodiment where the display substrate is an OLED display substrate, the manufacturing method may include: using an FMM mask plate to form sub-pixels of the OLED display substrate using an evaporation process, the FMM mask plate including at least one first opening, and the first opening corresponds to at least two adjacent sub-pixels of the same color.

[0064] An embodiment of the present invention further provides an FMM mask plate for forming the above-mentioned OLED display substrate, wherein the FMM mask plate includes at least one first opening, and the first opening corresponds to at least two adjacent sub-pixels of the same color.

[0065] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pixel arrangement structure, characterized in that: The invention comprises a plurality of first pixels and a plurality of second pixels, wherein the first pixels and the second pixels are alternately arranged in a row direction and a column direction, and the first pixels and the second pixels each comprise: a first sub-pixel, a second sub-pixel and a third sub-pixel, and in the same pixel, the first sub-pixel, the second sub-pixel and the third sub-pixel are distributed in a triangle, and the second sub-pixel and the third sub-pixel are located in the same row, and in the first pixels and the second pixels adjacent to each other in the row direction, a first straight line on which a side edge of the second sub-pixel and the third sub-pixel in the first pixel is parallel to the row direction and away from the first sub-pixel, and a third straight line on which a side edge of the second sub-pixel and the third sub-pixel in the second pixel is parallel to the row direction and away from the first sub-pixel, are located on both sides of the first sub-pixel, respectively, and a distance from the first sub-pixel to a straight line on which a side edge of the second sub-pixel and the third sub-pixel in the adjacent pixel is parallel to the row direction and away from the first sub-pixel in the adjacent pixel is greater than zero.

2. The pixel arrangement structure according to claim 1, characterized in that: In the column direction, the adjacent first pixels and second pixels are mirror-symmetrical.

3. The pixel arrangement structure according to claim 1, characterized in that: In the same pixel, the first sub-pixel, the second sub-pixel and the third sub-pixel are distributed in an isosceles triangle.

4. The pixel arrangement structure according to claim 1, characterized in that: A distance from the first subpixel to a straight line parallel to the row direction and away from a side edge of the first subpixel in the adjacent pixel in the same row of the second subpixel and the third subpixel is smaller than a distance from the first subpixel to a straight line parallel to the row direction and away from a side edge of the first subpixel in the adjacent pixel where the first subpixel is located.

5. The pixel arrangement structure according to claim 1, characterized in that: One side edge of the first sub-pixel parallel to the row direction and close to the second sub-pixel and the third sub-pixel is close to a second straight line, and the second straight line is parallel to the first straight line, located between the first straight line and the third straight line, and has the same distance from the first straight line and the third straight line.

6. The pixel arrangement structure according to claim 1, characterized in that: The pixel regions where the first pixel and the second pixel are located are both rectangular.

7. The pixel arrangement structure according to claim 6, characterized in that: In the same pixel, the second sub-pixel and the third sub-pixel are located at two ends of one side of the rectangle.

8. The pixel arrangement structure according to claim 1, characterized in that: The first sub-pixel, the second sub-pixel and the third sub-pixel are all rectangular.

9. The pixel arrangement structure according to claim 1, characterized in that: In the column direction, the adjacent first pixels and second pixels share a first sub-pixel, a second sub-pixel and / or a third sub-pixel.

10. The pixel arrangement structure according to any one of claims 1 to 9, characterized in that: The first sub-pixel is a green sub-pixel, the second sub-pixel is a red sub-pixel, and the third sub-pixel is a blue sub-pixel.

11. A display substrate, characterized in that: Comprising a pixel arrangement structure as described in any one of claims 1-10.

12. The display substrate according to claim 11, characterized in that: The display substrate is an OLED display substrate.

13. A display device, characterized in that: Comprising the display substrate as claimed in claim 11 or 12.

14. A method for manufacturing a display substrate, characterized in that: Used to manufacture the display substrate as claimed in claim 11 or 12.

15. The method for manufacturing a display substrate according to claim 14, characterized in that: The display substrate is an OLED display substrate, and the method includes: The sub-pixels of the OLED display substrate are formed by using an FMM mask plate through an evaporation process. The FMM mask plate includes at least one first opening, and the first opening corresponds to at least two adjacent sub-pixels of the same color.

16. An FMM mask, characterized in that: Used to form the display substrate as claimed in claim 12, the FMM mask includes at least one first opening, and the first opening corresponds to at least two adjacent sub-pixels of the same color.

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