Pixel arrangement structure, display substrate and display panel

Abstract

The embodiment of the invention relates to the technical field of display, in particular to a pixel arrangement structure which comprises a plurality of pixel units arranged repeatedly, and each pixel unit comprises two adjacent sub-pixel units; wherein each sub-pixel unit comprises a first sub-pixel, a second sub-pixel and a third sub-pixel which are adjacent in sequence; in each pixel unit, the two first sub-pixels are arranged adjacently. In addition, the invention also relates to a display substrate and a display panel. According to the pixel arrangement structure, the pixel aperture opening ratio can be improved, the precision requirement can be lowered, and therefore the preparation difficulty is lowered.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a pixel arrangement structure, a display substrate, and a display panel. Background Technology

[0002] In OLED (Organic Light Emitting Diodes) display devices, although OLED devices have many advantages, such as high luminous efficiency of green pixels, the luminous efficiency of red and blue pixels is relatively low. At the same time, the luminous lifespan of blue pixels is shorter than that of green and red pixels, which limits the display effect and lifespan of OLED display devices.

[0003] Existing technologies improve luminescent efficiency and lifetime by modifying luminescent materials. However, the preparation process requires highly precise equipment and is difficult. Therefore, reducing the difficulty of preparation has become an urgent problem to be solved. Summary of the Invention

[0004] Based on this, embodiments of this application provide a pixel arrangement structure, a display substrate, and a display panel.

[0005] To address the aforementioned technical problems, this application provides a pixel arrangement structure, employing the following technical solution:

[0006] A pixel arrangement structure includes a plurality of repeating pixel units, wherein each pixel unit includes two adjacent sub-pixel units;

[0007] The sub-pixel unit includes a first sub-pixel, a second sub-pixel, and a third sub-pixel that are sequentially adjacent to each other; in the pixel unit, two first sub-pixels are arranged adjacent to each other.

[0008] This application embodiment also provides a display substrate, including a pixel defining layer, the pixel defining layer including a first region, the first region being controlled to form pixel defining units arranged in an array;

[0009] The pixel defining unit includes two sub-pixel defining units, which include a first sub-pixel defining unit, a second sub-pixel defining unit, and a third sub-pixel defining unit.

[0010] Each of the first sub-pixel defining unit, the second sub-pixel defining unit, and the third sub-pixel defining unit defines a plurality of sub-pixel pits, each sub-pixel pit being used to form a sub-pixel, and the plurality of sub-pixels being arranged having the pixel arrangement structure described above.

[0011] This application embodiment also provides a display panel, wherein the pixels in the display panel have the pixel arrangement structure as described above, or the display panel includes the display substrate as described above.

[0012] Compared with the prior art, the embodiments of this application have the following main advantages:

[0013] The pixel arrangement structure of this application embodiment can improve the pixel aperture ratio and reduce the precision requirements, thereby reducing the manufacturing difficulty. Attached Figure Description

[0014] To more clearly illustrate the solution of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the pixel arrangement structure according to an embodiment of this application;

[0016] Figure 2 This is a schematic diagram illustrating the separation of two sub-pixel units according to an embodiment of this application;

[0017] Figure 3 (a) and (b) are color diagrams of sub-pixels of a pixel unit according to an embodiment of this application;

[0018] Figure 4 (a) and (b) are schematic diagrams of the connectivity state between sub-pixels in an embodiment of this application;

[0019] Figure 5 This is a schematic diagram of a quadrilateral forming a sub-pixel shape according to an embodiment of this application;

[0020] Figure 6 yes Figure 5 The diagram shows a pixel unit arrangement formed by piecing together quadrilaterals.

[0021] Figure 7 This is a schematic diagram of another quadrilateral forming the shape of a sub-pixel according to an embodiment of this application;

[0022] Figure 8 yes Figure 7 The diagram shows how quadrilaterals are pieced together to form the shapes of each sub-pixel.

[0023] Figure 9 yes Figure 8 A schematic diagram showing the arrangement of pixel units composed of each sub-pixel;

[0024] Figure 10 This is a schematic diagram of the rounded chamfer of a sub-pixel according to an embodiment of this application;

[0025] Figure 11 (a), (b), and (c) are schematic diagrams of pixel row misalignment settings in embodiments of this application;

[0026] Figure 12 (a) and (b) are another schematic diagram of the connectivity state between sub-pixels in an embodiment of this application;

[0027] Figure 13 This is yet another schematic diagram illustrating the connectivity state between sub-pixels in an embodiment of this application;

[0028] Figure 14 This is a schematic diagram of the pixel arrangement structure containing the edge deposition region in an embodiment of this application;

[0029] Figure 15 This is a schematic diagram of the display substrate according to an embodiment of this application;

[0030] Figure 16 (a), (b), and (c) are schematic diagrams of through-holes formed in the pixel definition layer according to embodiments of this application;

[0031] Figure 17 This is another schematic diagram of a via formed in the pixel definition layer according to an embodiment of this application;

[0032] Figure 18 This is another schematic diagram of a through-hole being formed in the pixel defining layer according to an embodiment of this application.

[0033] Figure label:

[0034] 1. Pixel unit; 10. Subpixel unit; 11. First subpixel; 12. Second subpixel; 13. Third subpixel; 14. Pixel delimiting layer; 14a. First region; 14b. Second region; 141. First subpixel delimiting unit; 142. Second subpixel delimiting unit; 143. Third subpixel delimiting unit; 15. Through hole. Detailed Implementation

[0035] Unless otherwise defined, 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 application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] This application provides a pixel arrangement structure, see [link to previous document]. Figure 1 and Figure 2 The pixel arrangement structure includes multiple repeating pixel units 1 ( Figure 1 The area displayed by medium-thick lines), the pixel unit 1 is connected by two adjacent sub-pixel units 10 (such as... Figure 2 As shown in the figure, the sub-pixel unit 10 includes a first sub-pixel 11, a second sub-pixel 12, and a third sub-pixel 13 that are sequentially adjacent to each other. In the pixel unit 1, two first sub-pixels 11 are arranged adjacent to each other. This arrangement makes the two first sub-pixels 11 adjacent, that is, there are sub-pixels of the same color arranged adjacent to each other in the pixel unit 1. This not only improves the pixel aperture ratio, which is beneficial to improving the luminous efficiency and lifespan of the device, but also makes the evaporation area or printing area of ​​the same color pixel larger because the sub-pixels of the same color are arranged together. This can reduce the precision requirements of evaporation or inkjet printing, thereby reducing the manufacturing difficulty.

[0038] In some embodiments, the peak emission wavelengths of the light-emitting layers of the three sub-pixels of the sub-pixel unit 10 are 650–670 nm, 530–550 nm, and 430–450 nm, respectively. Figure 3 As shown in (a), the emitted light is specifically red, green, and blue. Of course, in other embodiments, the sub-pixel unit 10 can be other arrangements of these three colors or other colors; this is not limited here. To facilitate differentiation of the colors of different sub-pixels, [the following is used]. Figure 3 The sub-pixels of pixel unit 1 are identified in the form shown in (b).

[0039] In one embodiment, refer back Figure 3 In (b), at least the light-emitting layers of the two first sub-pixels 11 in the same pixel unit 1 are interconnected, so that the ink (such as the light-emitting layer ink) printed can flow between the two sub-pixels, reducing the difficulty of preparation and improving ink accumulation, thereby improving the uniformity of the functional layer film formation in each sub-pixel and improving the film formation effect.

[0040] In one embodiment, such as Figure 4 As shown in (a), at least the light-emitting layers of two third sub-pixels 13 in two adjacent pixel units 1 in the same pixel row are interconnected; or as shown in (a) Figure 4 As shown in (b), at least the light-emitting layer is interconnected between the first sub-pixels 11 of two adjacent pixel units 1 in the same pixel row. Ink printed in this way can flow between the same sub-pixels, reducing the difficulty of preparation and improving ink accumulation, thereby improving the uniformity of film formation between sub-pixels and improving the film formation effect.

[0041] In some embodiments, the pixel unit 1 is preferably formed by combining two sub-pixel units 10 with the same shape; in this embodiment, the pixel unit 1 formed by combining two sub-pixel units 10 with the same shape can make the pixels fill the display area as much as possible, the pixel arrangement is more compact, and the pixel density is further improved, thereby improving the resolution.

[0042] In one embodiment, the pixel unit 1 is formed by rotating one sub-pixel unit 10 180 degrees relative to another sub-pixel unit 10 and then docking them together, thus forming a centrally symmetrical pixel unit 1. That is, with respect to the center point of the pixel unit 1, the two sub-pixel units 10 in the pixel unit 1 are centrally symmetrical, which is beneficial for the close arrangement of the pixel units 1.

[0043] In some embodiments, when the pixel arrangement structure is placed horizontally, when viewing the pixel arrangement structure from above (e.g.) Figure 1 As shown), combined with Figure 5 , Figure 7 and Figure 8 , Figure 7 and Figure 8 In the diagram, L1 = L2 = L, S1 = S2 = S, and the shapes of the first sub-pixel 11, the second sub-pixel 12, and the third sub-pixel 13 are all formed by splicing two quadrilaterals of the same shape in a plane.

[0044] Specifically, a quadrilateral is defined as being formed by a first short side, a second short side, a first long side, and a second long side that are not on the same straight line, connected end to end in a plane, wherein the first short side is perpendicular to the second long side, and the second short side is perpendicular to the first long side, as shown below. Figure 5 As shown in the figure, the quadrilateral indicated by the solid line is the quadrilateral used in the above embodiment to form the first sub-pixel 11, the second sub-pixel 12, and the third sub-pixel 13. This quadrilateral can be regarded as being cut from an equilateral triangle or a right triangle (one of the interior angles is 60°). The lengths of the first long side and the second long side are L1 and L2, respectively, and the lengths of the first short side and the second short side are S1 and S2, respectively. Figure 8The pentagon on the right has the same shape for the first sub-pixel 11 and the second sub-pixel 12. Both are formed by joining two quadrilaterals together in a plane with the first long side L1 as the joining edge. The two first long sides L1 coincide to form the axis of symmetry of the pentagon. Figure 8 The third sub-pixel 13, located on the left, is a pentagon formed by joining two quadrilaterals together in a plane with their second short sides S2 as the joining edge. The two second short sides S2 coincide to form the axis of symmetry of the pentagon. In this embodiment, the first sub-pixel 11, the second sub-pixel 12, and the third sub-pixel 13 are all formed based on the same quadrilateral combination, which is beneficial for forming a compact pixel arrangement, thereby increasing pixel density.

[0045] In some embodiments, the angle between the diagonal connecting two non-right-angle vertices of the quadrilateral and the first long side L1 is defined as α, and the angle between the diagonal and the second long side L2 is defined as β. L1, L2, S1, S2, α, and β satisfy:

[0046]

[0047] S1 = tanαL1;

[0048] S2 = tanβL2;

[0049] α+β=60°;

[0050] Wherein, 30°≤α<45°, 0μm<L2≤300μm; in this embodiment, L2 is the longest side, so the lengths of the other sides will be within this range. When using the pixel arrangement structure of this embodiment to fabricate a display device, the side lengths within this range have a larger aperture ratio, which can improve the display effect.

[0051] In some alternative embodiments, the value of α is any one of 30°, 35°, 40°, 45°, etc., or a range between any two of the aforementioned values.

[0052] In some alternative embodiments, the value of L2 is any one of 0.1μm, 1μm, 10μm, 20μm, 50μm, 100μm, 150μm, 200μm, 300μm, or a range between any two of the aforementioned values.

[0053] The pixel arrangement structure in this embodiment varies slightly depending on the value of α.

[0054] In one embodiment, α is 30° < α < 45°, where L1 < L2 and S1 < S2. In this case, the following approach is adopted: Figure 5The pixel unit 1, composed of the first sub-pixel 11, the second sub-pixel 12, and the third sub-pixel 13 formed by the quadrilaterals shown in the solid line, is as follows: Figure 6 As shown, for multiple pixel units 1 arranged in repeating rows, there is a non-display area E between two adjacent pixel units 1 in each pixel row. Nevertheless, since there are still sub-pixels of the same color arranged together, the aperture ratio of pixels of the same color increases, which can still reduce the accuracy requirements of vapor deposition or inkjet printing, thereby reducing the difficulty of device fabrication.

[0055] Similarly, in other embodiments, when the shapes or sizes of the two sub-pixel units 10 that make up pixel unit 1 are inconsistent, there will also be a non-display area between two adjacent pixel units 1 in each pixel row, which will sacrifice part of the display area. Of course, if there are still sub-pixels of the same color adjacent to each other in the two sub-pixel units 10 with inconsistent shapes or sizes, or if there are still sub-pixels of the same color adjacent to each other in the two adjacent pixel units 1, which increases the aperture ratio of the same color pixels, the accuracy requirements of vapor deposition or inkjet printing can still be reduced, thereby reducing the difficulty of device fabrication.

[0056] In one embodiment, α is taken as 30°, where L1 = L2 = L, S1 = S2 = S, reference. Figure 7 The quadrilateral is specifically formed by drawing perpendicular lines from the centroid of an equilateral triangle to each side, and dividing the equilateral triangle into three equal parts. Figure 7 (The solid line part); or it can be an axially symmetric figure formed by splicing two right triangles along their hypotenuses, wherein the right triangle satisfies that the hypotenuse is twice the length of the shorter right triangle (the longer right triangle is L, the shorter right triangle is S, and the hypotenuse is 2S).

[0057] The interior angles of the quadrilateral formed in this way are 90°, 60°, 90°, and 120° respectively. The pentagon formed by joining two quadrilaterals is as follows: Figure 8 As shown, the shapes of the first sub-pixel 11 and the second sub-pixel 12 are obtained by overlapping the two quadrilaterals with their longer right-angled sides L. Figure 8 The axially symmetric pentagon on the right side of the middle section is joined with two quadrilaterals by overlapping the short right-angled sides S to obtain the shape of the third sub-pixel 13. Figure 8 (The axially symmetric pentagon on the left side of the middle), specifically, for the first sub-pixel 11 and the second sub-pixel 12, as... Figure 8 The right-side pentagon has sides of length 2S (bottom), S (first side), L (first top), L (second top), and S (second side) in a clockwise direction. For the third sub-pixel 13, as... Figure 8The left-side pentagon has sides of length 2L (bottom), L (first side), S (first top), S (second top), and L (second side) in a clockwise direction. When the first sub-pixel 11, the second sub-pixel 12, and the third sub-pixel 13 are joined to form sub-pixel unit 10, the three pixels are adjacent to each other in a clockwise direction. Specifically: the second side of the first sub-pixel 11 is flush with the bottom edge of the second sub-pixel 12, and the two sides coincide near the endpoint of the third sub-pixel 13; the second top edge of the second sub-pixel 11 is flush with the bottom edge of the third sub-pixel 13, and the two sides coincide away from the endpoint of the first sub-pixel 11; simultaneously, the first top edge of the second sub-pixel 12 and the first side edge of the third sub-pixel 13 are connected to form a straight line segment. Thus, when the sub-pixel units 10 are joined to form multiple pixel units 1 and arranged in rows, the resulting arrangement structure is as follows: Figure 9 As shown, on the one hand, two adjacent pixel units 1 in the pixel row are arranged closely together (compared to...). Figure 6 There are no more gaps (E). On the other hand, the edges of the pixel rows are straight lines, which can achieve seamless arrangement between multiple rows of pixel units 1. Such a pixel arrangement structure allows the pixels to fill the display area as much as possible, which is conducive to improving pixel density and thus improving resolution.

[0058] In some embodiments, the inner walls of the sub-pixel pits used to create the first sub-pixel 11, the second sub-pixel 12, and the third sub-pixel 13 have a smooth transition, specifically, the inner wall corners are rounded. Figure 10 As shown, during device fabrication, setting the corners of each sub-pixel pit to rounded chamfers can make the film formation more uniform, and also helps to reduce the precision requirements of printing or evaporation, reduce the fabrication difficulty, and improve the fabrication efficiency. The following embodiments use... Figure 8 The pixel arrangement structure of the present application embodiment is further illustrated by taking the shapes of the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 as an example. It should be noted that this example does not constitute an exclusive limitation on the technical solution of the present application.

[0059] In some embodiments, the pixel units 1 are arranged in a row-by-row manner; specifically, refer back to Figure 9 The pixel units 1 are arranged sequentially along the first direction D1 to form a row, constituting a pixel row. It should be noted that the pixel row mentioned in the above embodiment conforms to the definition of a pixel row. Multiple pixel rows are arranged sequentially along the second direction D2 to form the pixel arrangement structure. The first direction and the second direction are perpendicular to each other. When the pixel arrangement structure is placed parallel to the horizontal plane, the first direction and the second direction are parallel to the horizontal plane.

[0060] In this embodiment, multiple first sub-pixels 11 are arranged sequentially in a row along the first direction D1 to form a first sub-pixel row, and multiple second sub-pixels 12 and multiple third sub-pixels 13 are arranged alternately in a row along the first direction D1 to form a second sub-pixel row. Second sub-pixel rows are respectively located on both sides of the first sub-pixel row. In this embodiment, the adjacent arrangement of first sub-pixels 11 in the first sub-pixel row increases the pixel aperture ratio and also increases the aperture ratio of single-color pixels, which can reduce the precision requirements of vapor deposition or inkjet printing, thereby reducing the difficulty of device fabrication.

[0061] In one embodiment, the two second sub-pixel rows are each on a straight line away from the first sub-pixel row, and the two straight lines are parallel to each other. Accordingly, the pixel rows are arranged in parallel, and the pixels are regularly distributed, which is beneficial for pixel printing and also for the fabrication of vapor deposition or photolithography masks.

[0062] In the pixel arrangement structure provided in this application, the second sub-pixel 12 and the third sub-pixel 13 are arranged alternately in the second sub-pixel row, so there are multiple alignment methods between the two pixel rows.

[0063] In some embodiments, two adjacent pixel rows contain two adjacent second sub-pixel rows; in one of the two adjacent second sub-pixel rows, the second sub-pixel 12 in one of the second sub-pixel rows has a first side extending along a first direction (i.e., as described above). Figure 8 The first top edge of the second sub-pixel 12), and the third sub-pixel 13 in another second sub-pixel row has a second edge extending along the first direction (i.e., in conjunction with the above). Figure 8 The first side of the third sub-pixel 13 is partially adjacent to the second side, causing two adjacent pixel units on different pixel rows to be misaligned in the first direction. This facilitates the adjacency of identical sub-pixels, and the length of the portion of the first side not adjacent to the second side is the misalignment amount D. The misalignment amount D satisfies: 0μm < D < L, where 0μm < L ≤ 300μm, and L is a reference value. Figure 7 and Figure 8 That is, the misalignment amount D of the misalignment distribution depends on the size of the first sub-pixel 11, the second sub-pixel 12, and the third sub-pixel 13. The maximum range of the misalignment amount D is 0μm≤D≤300μm, and the misalignment amount D will not exceed Figure 8 Zhongru Figure 8 The length L of the first top edge of the second sub-pixel 12 shown in the quadrilateral on the right.

[0064] In one embodiment, the misalignment amount D = 0 μm, that is, two adjacent pixel units 1 in two adjacent pixel rows are aligned, and the first side and the second side are adjacent and completely overlap. Figure 11As shown in (a), the edge of the second sub-pixel 12 in one second sub-pixel row completely overlaps with the edge of the third sub-pixel 13 in another second sub-pixel row, such that adjacent pixel rows form arrangement units in which the second sub-pixel 12 and the third sub-pixel 13 are arranged alternately in a clockwise or counterclockwise direction. In this arrangement unit, as shown in (a), Figure 12 As shown in (a), the two second sub-pixels 12 are interconnected, or as shown in (a). Figure 12 As shown in (b), the two third sub-pixels 13 are interconnected, so the ink printed can flow between the two sub-pixels. This eliminates the need for inkjet printing in each pixel, reducing the difficulty of preparation and avoiding ink accumulation. This also improves the uniformity of film formation between sub-pixels and enhances the film formation effect.

[0065] In one embodiment, the misalignment amount D of the misalignment distribution satisfies: 0 μm < D < L, 0 μm < L ≤ 300 μm, and L is the reference value. Figure 7 and Figure 8 The first side and the second side are adjacent and partially overlap, such as Figure 11 As shown in (b), the edge of the second sub-pixel 12 in one of the second sub-pixel rows partially overlaps with the edge of the third sub-pixel 13 in another second sub-pixel row, and the two second sub-pixels 12 are interconnected. In this way, the ink can flow between the two sub-pixels, reducing the difficulty of preparation and avoiding ink accumulation, thereby improving the uniformity of film formation between each sub-pixel and improving the film formation effect.

[0066] In one embodiment, the misalignment amount D of the misalignment distribution satisfies: D = L, 0 μm < L ≤ 300 μm, L is the reference value. Figure 7 and Figure 8 The first edge and the second edge are completely misaligned and not adjacent, such as Figure 11 As shown in (c), at this time, the edge of the second sub-pixel 12 in one of the second sub-pixel rows is adjacent to and completely overlaps with the edge of the second sub-pixel 12 in another second sub-pixel row; combined with Figure 13 In the alignment method of this embodiment, the two adjacent second sub-pixels 12 in two adjacent rows of second sub-pixels are interconnected, and the two adjacent third sub-pixels 13 are also interconnected. The arrangement structure of this embodiment allows two sub-pixels of the same color to be arranged adjacently for each of the three types of sub-pixels, which further improves the pixel aperture ratio and reduces the precision requirements of vapor deposition or inkjet printing, reduces the difficulty of device fabrication, and allows the printed ink to flow between two sub-pixels, reducing the difficulty of fabrication and avoiding ink accumulation. This improves the uniformity of film formation between each sub-pixel, improves the film formation effect, and is beneficial to improving the luminous efficiency and lifespan of the device.

[0067] The present invention also provides a display substrate, such as Figure 14 and Figure 15 As shown, the display substrate includes a pixel defining layer 14, and the pixel defining layer 14 includes a first region 14a. Figure 14 The first region (with a gray line area) includes pixel defining units arranged in an array; each pixel defining unit includes two sub-pixel defining units, namely a first sub-pixel defining unit 141, a second sub-pixel defining unit 142, and a third sub-pixel defining unit 143; each of the first sub-pixel defining unit 141, the second sub-pixel defining unit 142, and the third sub-pixel defining unit 143 defines a plurality of sub-pixel pits, each sub-pixel pit being used to form a sub-pixel, and the plurality of sub-pixels being arranged in the pixel arrangement structure described in the above embodiment and having corresponding technical effects.

[0068] In some embodiments, the sub-pixel pits defined by the first sub-pixel defining unit 141, the second sub-pixel defining unit 142, and the third sub-pixel defining unit 143 can be used to fabricate sub-pixels of different types, such as blue sub-pixels, red sub-pixels, and green sub-pixels, respectively. The material forming the sub-pixels is deposited into the first sub-pixel defining unit 141, the second sub-pixel defining unit 142, and the third sub-pixel defining unit 143 by means of vapor deposition or solution method (inkjet printing, etc.). Since sub-pixels of the same color can be arranged together, the vapor deposition area or printing area of ​​the same color pixel becomes larger, which can reduce the precision requirements of vapor deposition or inkjet printing, thereby reducing the manufacturing difficulty.

[0069] In some embodiments, the pixel defining layer 14 is provided with a plurality of through holes 15, which are used to connect two sub-pixel pits of the same type, such as connecting two sub-pixel pits defined by two adjacent first sub-pixel defining units 141, connecting two adjacent second sub-pixel defining units 142, and connecting two adjacent third sub-pixel defining units 143.

[0070] In one embodiment, such as Figure 16 As shown in (a), the through hole 15 connects the sub-pixel pits defined by the two first sub-pixel defining units 141; and as shown in (a), the through hole 15 connects the two sub-pixel pits defined by the first sub-pixel defining units 141. Figure 16 As shown in (b), the through-hole 15 connects the sub-pixel pits defined by the two second sub-pixel defining units 142; and so on. Figure 16 As shown in (c), the through hole 15 connects the sub-pixel pits defined by the two third sub-pixel defining units 143.

[0071] By providing vias 15 on the pixel defining layer 14, the ink printed in this way can flow between any two adjacent sub-pixel pits defined by the same type of sub-pixel defining unit, eliminating the need to perform inkjet printing in each sub-pixel pit, reducing the fabrication difficulty, and avoiding ink accumulation. This also improves the uniformity of the film formation of functional layers (such as light-emitting layers) in each sub-pixel pit, thereby improving the film formation effect.

[0072] It should be noted that the through-hole 15 provided at the intersection of the pixel defining layer 14 can only connect sub-pixels of the same color, thus avoiding contamination by the material of other sub-pixels.

[0073] In one embodiment, such as Figure 17 As shown, a through-hole 15 is provided in the pixel defining layer 14 between two adjacent first sub-pixel defining units 141, and a through-hole 15 is also provided in the pixel defining layer 14 between two adjacent third sub-pixel defining units 143. This allows the sub-pixel pits defined by two adjacent first sub-pixel defining units 141 to be interconnected, and at the same time, the sub-pixel pits defined by two third sub-pixel defining units 143 are also interconnected. In this way, the ink printed can flow between the two types of sub-pixel defining units, reducing the difficulty of preparation, improving ink accumulation, and thus improving the uniformity of film formation between each sub-pixel and improving the film formation effect.

[0074] In one embodiment, such as Figure 18 As shown, the sub-pixel pits defined by two adjacent first sub-pixel defining units 141 in one direction are interconnected, and the sub-pixel pits defined by two adjacent second sub-pixel defining units 142 in another direction are interconnected. At the same time, the sub-pixel pits defined by two third sub-pixel defining units 143 are interconnected. In this way, the ink printed can flow between the sub-pixel pits defined by the two types of sub-pixel defining units, which reduces the preparation difficulty, improves ink accumulation, and thus improves the uniformity of film formation between each sub-pixel and improves the film formation effect.

[0075] In some embodiments, based on Figure 16 , Figure 17 , Figure 18 The through-hole setting type allows for the combination of through-holes 15 opened on the pixel defining layer 14 at different positions, so that multiple pixel openings of the same category are connected through the through-holes 15, which reduces the printing accuracy requirements of inkjet printing (reduces the process difficulty) and improves production efficiency. At the same time, since the sub-pixel pits defined by the sub-pixel defining unit are connected, the uniformity of ink film formation in the sub-pixel pits is also improved.

[0076] In some embodiments, the sidewalls of the sub-pixel pits have a smooth transition; re-reference Figure 10As shown, during the fabrication of the display substrate, by setting each corner of the inner wall of the sub-pixel pit on the display substrate as a rounded chamfer, the subsequent functional layer film formation in the sub-pixel pit can be made more uniform. It also helps to reduce the precision requirements of printing or evaporation, reduce the fabrication difficulty, and improve the fabrication efficiency.

[0077] In some embodiments, refer back Figure 14 The pixel defining layer 14 further includes a second region 14b. Figure 14 (as shown in the black line area), the second region 14b is disposed on at least one side of the first region 14a, preferably the second region 14b is disposed around the first region 14a.

[0078] In this embodiment, the second region 14b has a deposition pit, which is connected to the sub-pixel pit defined by the first sub-pixel defining unit 141, the second sub-pixel defining unit 142, or the third sub-pixel defining unit 143. In the subsequent device fabrication process, by directly depositing ink in the deposition pit, the ink can flow into the sub-pixel pit connected to the deposition pit, which reduces the printing accuracy requirements of inkjet printing process that directly prints ink in the sub-pixel pit (reduces the process difficulty) and improves production efficiency. At the same time, since there is a connection between the sub-pixels, the uniformity of ink film formation in the sub-pixels will also be improved.

[0079] The present invention also provides a display panel, wherein the pixels in the display panel have the pixel arrangement structure described in the above embodiments and have the corresponding technical effects, or the display panel includes the display substrate described in the above embodiments and has the corresponding technical effects; wherein the pixel arrangement structure can refer to the above embodiments and will not be described again here. The display panel can be used in any device with display function, such as television, computer, mobile phone, tablet, watch, game console, billboard, etc., and is not particularly limited here.

[0080] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A pixel arrangement structure, characterized by, The pixel unit comprises two adjacent sub-pixel units; The sub-pixel unit comprises a first sub-pixel, a second sub-pixel and a third sub-pixel which are sequentially adjacent to each other; and two first sub-pixels are arranged adjacent to each other in the pixel unit.

2. The pixel arrangement structure of claim 1, wherein, A plurality of pixel units are arranged in a row along a first direction to form a pixel row, and a plurality of pixel rows are arranged in a row along a second direction to form the pixel arrangement structure. In the pixel row, a plurality of first sub-pixels are arranged in a row along a first direction to form a first sub-pixel row, and a plurality of second sub-pixels and a plurality of third sub-pixels are alternately arranged in a row along the first direction to form a second sub-pixel row, and the first sub-pixel row is flanked by the second sub-pixel row; and / or The two sub-pixel units in the pixel unit are centrally symmetric with respect to a center point of the pixel unit; and / or The light-emitting peak wavelengths of the light-emitting layers of the first sub-pixel, the second sub-pixel and the third sub-pixel are 650-670 nm, 530-550 nm and 430-450 nm, respectively.

3. The pixel arrangement of claim 2, wherein, There are two adjacent second sub-pixel rows in two adjacent pixel rows. In the two adjacent second sub-pixel rows, the second sub-pixels in one of the second sub-pixel rows have a first edge extending in the first direction, the third sub-pixels in the other of the second sub-pixel rows have a second edge extending in the first direction, and the first edge and the second edge are partially adjacent, so that two adjacent pixel units on different pixel rows are misaligned in the first direction, and the length of the part of the first edge that is not adjacent to the second edge is the misalignment amount.

4. The pixel arrangement structure of claim 3, wherein, The misalignment amount D satisfies: 0 μm≤D≤300 μm.

5. The pixel arrangement structure of claim 3, wherein, The second sub-pixels and the third sub-pixels in adjacent pixel units in the pixel row are alternately arranged in a clockwise direction or a counterclockwise direction; and / or In the first sub-pixel row, at least the light-emitting layers of adjacent first sub-pixels are in communication; and / or In the two adjacent second sub-pixel rows, at least the light-emitting layers of adjacent second sub-pixels are in communication, or at least the light-emitting layers of adjacent third sub-pixels are in communication.

6. The pixel arrangement structure according to any one of claims 1 to 5, wherein, A quadrilateral is defined by a first short side, a second short side, a first long side and a second long side which are sequentially connected end to end in a plane, wherein the first short side is perpendicular to the second long side, and the second short side is perpendicular to the first long side; The shape of the first sub-pixel is the same as the shape of the second sub-pixel, and both are pentagons formed by two quadrilaterals which are connected to each other in a plane with the first long side as the connecting side, and two first long sides coincide to form the symmetry axis of the pentagon; The shape of the third sub-pixel is a pentagon formed by two quadrilaterals which are connected to each other in a plane with the second short side as the connecting side, and two second short sides coincide to form the symmetry axis of the pentagon.

7. The pixel arrangement of claim 6, wherein, Lengths of the first long side and the second long side are L1 and L2 respectively, lengths of the first short side and the second short side are S1 and S2 respectively, an angle between a diagonal line connecting two non-right-angle vertices of the quadrangle and the first long side is defined as α, and an angle between the diagonal line and the second long side is defined as β, L1, L2, S1, S2, α and β satisfy: S1 = tanαL1. S2 = tanβL2. α+β＝60°； Wherein, 30°≤α<45°, 0μm<L2≤300μm.

8. A display substrate, characterized by, The pixel defining layer comprises a first region comprising pixel defining units arranged in an array; The pixel defining unit comprises two sub-pixel defining units, and the sub-pixel defining unit comprises a first sub-pixel defining unit, a second sub-pixel defining unit and a third sub-pixel defining unit; Each of the first sub-pixel defining unit, the second sub-pixel defining unit and the third sub-pixel defining unit defines a plurality of sub-pixel pits, and each of the sub-pixel pits is used for forming a sub-pixel, and the plurality of sub-pixels are arranged in the pixel arrangement structure of any one of claims 1 to 7. 9.The display substrate of claim 8, wherein, A plurality of through holes are arranged on the pixel defining layer, wherein, At least one through hole in the plurality of through holes is used for connecting sub-pixel pits defined by two adjacent first sub-pixel defining units in position; and / or, At least one through hole in the plurality of through holes is used for connecting sub-pixel pits defined by two adjacent second sub-pixel defining units in position; and / or, At least one through hole in the plurality of through holes is used for connecting sub-pixel pits defined by two adjacent third sub-pixel defining units in position; and / or, The side wall of the sub-pixel pit is smoothly transitioned; and / or, The pixel defining layer further comprises a second region arranged on at least one side of the first region, and the second region has a deposition pit in communication with a sub-pixel pit in the first sub-pixel defining unit, the second sub-pixel defining unit or the third sub-pixel defining unit.

10. A display panel, characterized by, The pixel in the display panel has the pixel arrangement structure of any one of claims 1 to 7, or the display panel comprises the display substrate of claim 8 or 9.

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