Display substrate, display device and high-precision metal mask

Abstract

The present disclosure provides a display substrate, a display device and a high-precision metal mask, wherein the display substrate comprises: a first sub-pixel, a second sub-pixel and a third sub-pixel; in a first direction, the first sub-pixel and the third sub-pixel are alternately arranged to form a first sub-pixel row, and the second sub-pixel forms a second sub-pixel row; in a second direction, the first sub-pixel row and the second sub-pixel row are alternately arranged; two first sub-pixels and two third sub-pixels distributed in two adjacent rows and columns form a 2*2 matrix, in which two first sub-pixels and two third sub-pixels are located in different rows and columns, and the center lines of the two first sub-pixels and the two third sub-pixels form a virtual quadrilateral, and the second sub-pixel is located in the virtual quadrilateral; in the virtual quadrilateral, the centers of the two first sub-pixels and the two third sub-pixels are respectively spaced from the center of the second sub-pixel by at least two differences. The present disclosure makes the virtual pixel brightness center arrangement more uniform.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display substrate, a display device and a high-precision metal mask. Background Art

[0002] An organic light-emitting diode (OLED) display device includes a substrate, a light-emitting layer, and an encapsulation protection layer. The light-emitting layer includes sub-pixels arranged in a matrix on the substrate. Each sub-pixel is generally deposited with an organic light-emitting material on the corresponding sub-pixel position of the array substrate through a fine metal mask (FMM). With the development of technology, people's requirements for the resolution of display devices are getting higher and higher.

[0003] Currently, due to the limitations of FMM's manufacturing level and the accuracy of the evaporation process, it is difficult to increase high resolution by reducing the sub-pixel size and reducing the pixel pitch. A commonly used method is sub-pixel rendering (SPR) technology, which uses sub-pixels that share certain positions between different pixels to simulate higher resolution with relatively few sub-pixels. SPR increases the aperture ratio of the light-emitting layer, and improves the aperture ratio and life of the display device. However, the existing pixel arrangement structure usually has an uneven arrangement of virtual pixel brightness centers, so when displaying some text and specific graphics, it is inevitable to bring a sense of granularity and distortion to the display. Summary of the invention

[0004] In view of this, the present disclosure provides a display substrate, a display device and a high-precision metal mask, which are used to solve the problem of uneven arrangement of virtual pixel brightness centers in existing pixel arrangement structures, resulting in graininess and distortion in display.

[0005] In order to solve the above technical problems, the present disclosure adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present disclosure provides a display substrate, comprising: a first sub-pixel, a second sub-pixel and a third sub-pixel;

[0007] In a first direction, the first sub-pixels and the third sub-pixels are alternately arranged to form a first sub-pixel row, and the second sub-pixels form a second sub-pixel row;

[0008] In a second direction, the first sub-pixel rows and the second sub-pixel rows are arranged alternately, and the first direction is substantially perpendicular to the second direction;

[0009] Two first sub-pixels and two third sub-pixels distributed in two adjacent rows and two columns form a 2*2 matrix, in which the two first sub-pixels are located in different rows and columns, the two third sub-pixels are located in different rows and columns, a line connecting the centers of the two first sub-pixels and the two third sub-pixels forms a virtual quadrilateral, and the second sub-pixel is located within the virtual quadrilateral;

[0010] At least two of the distances from the centers of the two first sub-pixels and the centers of the two third sub-pixels corresponding to the same virtual quadrilateral to the center of the second sub-pixel are different;

[0011] The third sub-pixel includes a symmetric axis along a first oblique direction and a symmetric axis along a second oblique direction, and a width of the third sub-pixel in the first oblique direction is different from a width in the second oblique direction; and / or the first sub-pixel includes a symmetric axis along a first oblique direction and a symmetric axis along a second oblique direction, and a width of the first sub-pixel in the first oblique direction is different from a width in the second oblique direction;

[0012] The second oblique direction is substantially perpendicular to the first oblique direction, and the second oblique direction intersects with the first oblique direction, the first direction, and the second direction.

[0013] Optionally, the internal angle range of the virtual quadrilateral is 70°-120°.

[0014] Optionally, two first sub-pixels and two third sub-pixels corresponding to the same virtual quadrilateral surround a second sub-pixel, and the closest distances from other first sub-pixels and third sub-pixels outside the virtual quadrilateral to the second sub-pixel are greater than the closest distances from the two first sub-pixels and two third sub-pixels to the second sub-pixel.

[0015] Optionally, the ratio of any two of the distances from the centers of the two first sub-pixels and the centers of the two third sub-pixels corresponding to the same virtual quadrilateral to the center of the second sub-pixel is in the range of 0.7-1.3.

[0016] Optionally, the difference in distances between the centers of the two first sub-pixels corresponding to the same virtual quadrilateral and the center of the second sub-pixel is smaller than the difference in distances between the centers of the two third sub-pixels corresponding to the virtual quadrilateral and the center of the second sub-pixel.

[0017] Optionally, the difference in distances between the centers of the two first sub-pixels corresponding to the same virtual quadrilateral and the center of the second sub-pixel is substantially equal.

[0018] Optionally, the distances between the centers of the two first sub-pixels and the centers of the two third sub-pixels corresponding to the same virtual quadrilateral and the center of the second sub-pixel are respectively in a range of 20-60 μm.

[0019] Optionally, the first sub-pixel and the third sub-pixel have different shapes.

[0020] Optionally, both the first sub-pixel and the third sub-pixel are axially symmetrical graphics, and a symmetry axis of at least one of the first sub-pixels and a symmetry axis of at least one of the third sub-pixels are parallel and do not overlap; and / or,

[0021] The first sub-pixel has a symmetry axis in a first oblique direction, and the symmetry axes of two adjacent first sub-pixels in the first oblique direction do not overlap; and / or,

[0022] The third sub-pixel has a symmetry axis in a first oblique direction, and the symmetry axes of two third sub-pixels adjacent to each other in the first oblique direction do not overlap in the first oblique direction.

[0023] Optionally, within at least one of the virtual quadrilaterals, the distances between the center of the second sub-pixel and the centers of the two third sub-pixels are not equal, and the distances between the center of the second sub-pixel and the centers of the two first sub-pixels are approximately equal;

[0024] or

[0025] In at least one of the virtual quadrilaterals, the distance between the center of the second sub-pixel and the centers of the two third sub-pixels is substantially equal, and the distance between the center of the second sub-pixel and the centers of the two first sub-pixels is substantially equal;

[0026] or

[0027] In at least one of the virtual quadrilaterals, the distance between the center of the second sub-pixel and the centers of the two third sub-pixels is substantially equal, and the distance between the center of the second sub-pixel and the centers of the two first sub-pixels is unequal.

[0028] Optionally, within at least one of the virtual quadrilaterals, the distance between the second sub-pixel and the first of the third sub-pixels is L1, the distance between the second sub-pixel and the center of the second of the third sub-pixels is L2, and the distances between the second sub-pixel and the two first sub-pixels are both L1;

[0029] or

[0030] In at least one of the virtual quadrilaterals, a distance between the second sub-pixel and two of the third sub-pixels, and a distance between two of the first sub-pixels are both L1;

[0031] or

[0032] In at least one of the virtual quadrilaterals, a distance between the second sub-pixel and two of the third sub-pixels, and a distance between two of the first sub-pixels are both L2;

[0033] or

[0034] In at least one of the virtual quadrilaterals, the distances between the second sub-pixel and the two third sub-pixels are both L1, the distance between the second sub-pixel and the first of the first sub-pixels is L1, and the distance between the second sub-pixel and the second of the first sub-pixels is L2;

[0035] or

[0036] In at least one of the virtual quadrilaterals, the distance between the second sub-pixel and the two third sub-pixels is L2, and the distance between the second sub-pixel and the two first sub-pixels is L1;

[0037] Among them, L2 is greater than L1.

[0038] Optionally, the difference between L2 and L1 is greater than or equal to 1 μm, and the range of L1 is 12 to 30 μm.

[0039] Optionally, the virtual quadrilateral is a right-angled trapezoid, two internal angles of which are 90°, and one of the other two internal angles is an obtuse angle and the other is an acute angle.

[0040] Optionally, all interior angles of the virtual quadrilateral range from 70° to 120°.

[0041] Optionally, some of the virtual quadrilaterals are first parallelograms, and some of the virtual quadrilaterals are second parallelograms. In the row direction and the column direction, the first parallelograms and the second parallelograms are arranged alternately, and at least one internal angle of the first parallelogram and the second parallelogram is different.

[0042] Optionally, the acute angles of the first parallelogram and the second parallelogram are in a range of greater than or equal to 70° and greater than 90°.

[0043] Optionally, a difference between the width of the third sub-pixel and / or the first sub-pixel in the first oblique direction and the second oblique direction is greater than or equal to 1 μm.

[0044] Optionally, the width of the second sub-pixel in the first oblique direction and the second oblique direction are different.

[0045] Optionally, within the virtual quadrilateral, the second sub-pixel is roughly symmetrical with respect to a center line connecting two adjacent third sub-pixels arranged in the first oblique direction or the second oblique direction, and is roughly symmetrical with respect to a center line connecting two adjacent first sub-pixels arranged in the second oblique direction or the first oblique direction.

[0046] Optionally, four virtual quadrilaterals arranged in an array form a virtual polygon, and the first sub-pixel and the third sub-pixel are located at the vertex or edge of the second virtual polygon and are alternately distributed on the edge or vertex position of the virtual polygon in a clockwise direction.

[0047] Optionally, within the virtual polygon, centers of the third sub-pixels in the same row are approximately on a straight line parallel to the row direction, and / or centers of the third sub-pixels in the same column are approximately on a straight line parallel to the column direction.

[0048] Optionally, within the virtual polygon, centers of the second sub-pixels located in the same row are approximately on a straight line parallel to the row direction, and / or centers of the second sub-pixels located in the same column are approximately on a straight line parallel to the column direction.

[0049] Optionally, the total opening area of ​​the third sub-pixel, the second sub-pixel and the first sub-pixel decreases successively, the total opening area of ​​the first sub-pixel is x, the total opening area of ​​the second sub-pixel is a*x, and the total opening area of ​​the third sub-pixel is b*x, wherein 0.5≤a≤0.8, 1≤b≤2.2.

[0050] Optionally, the shapes of the first sub-pixel, the second sub-pixel and the third sub-pixel are selected from any one of a polygon, a circle and an ellipse.

[0051] Optionally, the shapes of the first sub-pixel, the second sub-pixel and the third sub-pixel are selected from any one of a quadrilateral, a hexagon, an octagon, a quadrilateral with rounded corners, a hexagon with rounded corners or an octagon with rounded corners, a circle, and an ellipse.

[0052] Optionally, the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.

[0053] In a second aspect, an embodiment of the present disclosure provides a display device, comprising the display substrate of the first aspect.

[0054] Optionally, the display device also includes a pixel defining layer, the pixel defining layer includes a plurality of pixel defining layer openings, each of the first sub-pixels, each of the second sub-pixels, and each of the third sub-pixels corresponds to a pixel defining layer opening, respectively, and the shapes of the first sub-pixel, the second sub-pixel, and the third sub-pixel are substantially the same as the shapes of the openings of the corresponding pixel defining layers.

[0055] Optionally, the first sub-pixel includes a multi-layer film layer, and the multi-layer film layer of the first sub-pixel at least partially covers the area outside the pixel defining layer opening; and / or the second sub-pixel includes a multi-layer film layer, and the multi-layer film layer of the second sub-pixel at least partially covers the area outside the pixel defining layer opening; and / or the third sub-pixel includes a multi-layer film layer, and the multi-layer film layer of the third sub-pixel at least partially covers the area outside the pixel defining layer opening.

[0056] Optionally, at least part of the openings of the pixel defining layer are different in shape or area.

[0057] Optionally, the pixel defining layer opening corresponding to the first sub-pixel or the third sub-pixel has at least a partial shape or area that is different.

[0058] Optionally, the shortest distances from at least part of the pixel defining layer opening corresponding to the first sub-pixel or the third sub-pixel to the adjacent opening are unequal.

[0059] In a third aspect, an embodiment of the present disclosure provides a high-precision metal mask plate for manufacturing the display substrate of the first aspect above, wherein the first sub-pixel includes a multi-layer film layer, the second sub-pixel includes a multi-layer film layer, and the third sub-pixel includes a multi-layer film layer, and the mask plate includes: a plurality of opening areas, the plurality of opening areas including a first opening area corresponding to the shape and distribution of at least one film layer in the first sub-pixel, or a second opening area corresponding to the shape and distribution of at least one film layer in the second sub-pixel, or a third opening area corresponding to the shape and distribution of at least one film layer in the third sub-pixel.

[0060] The beneficial effects of the above technical solution of the present disclosure are as follows:

[0061] In the disclosed embodiment, on the one hand, higher resolution can be achieved by sharing sub-pixels, and on the other hand, by setting different widths of the first pixel and / or the third sub-pixel in different diagonal directions, at least two of the distances from the centers of the two first sub-pixels and the centers of the two third sub-pixels in the virtual quadrilateral to the center of the second sub-pixel are different, thereby achieving a more uniform arrangement of the brightness centers of the virtual pixels, avoiding the graininess and distortion of the display, and improving the display effect. On the other hand, there is no need to move the position of the sub-pixel to displace the brightness center of the virtual pixel, and the implementation cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 A schematic diagram of a pixel arrangement structure in the related art;

[0063] Figure 2 is a schematic diagram of a display substrate according to an embodiment of the present disclosure;

[0064] Figure 3 and 5 is a schematic diagram of a display substrate according to Embodiment 1 of the present disclosure;

[0065] Figure 4 and 6 is a schematic diagram of a display substrate according to a second embodiment of the present disclosure;

[0066] Figure 7-Figure 13 A schematic diagram of the positional relationship between the display substrate and the opening area of ​​the light-emitting layer according to an embodiment of the present disclosure;

[0067] Figure 14-15 is a schematic diagram of a display substrate according to a third embodiment of the present disclosure;

[0068] Figure 16-Figure 18 Schematic diagrams of high-precision metal masks for manufacturing the first sub-pixel, the second sub-pixel and the third sub-pixel in the display substrate of the above embodiment respectively;

[0069] Fig.19 FIG. 4 is a schematic diagram of a cross-sectional structure of a display substrate according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present disclosure.

[0071] Please refer to Figure 1 , Figure 1 is a schematic diagram of a pixel arrangement structure in the related art, Figure 1The blue sub-pixel (B) and the red sub-pixel (R) are both squares. Under this structure, the distance l1 between the brightness centers of the virtual pixel in the i-1th row and the jth column and the virtual pixel in the j+1th column (the black dots in the figure) is greater than the distance l2 between the brightness centers of the virtual pixel in the jth column and the virtual pixel in the j-1th column. The distance between the brightness centers of the virtual pixel in the i-th row and the j+1th column (the black dots in the figure) is less than the distance between the brightness centers of the virtual pixel in the jth column and the virtual pixel in the j-1th column, which results in a perceptible sense of distortion and graininess to the human eye when displaying vertical lines or images dominated by vertical lines.

[0072] To solve the above problems, please refer to Figure 2 , the embodiment of the present disclosure provides a display substrate, including: a first sub-pixel R, a second sub-pixel G and a third sub-pixel B;

[0073] In a first direction, the first sub-pixels R and the third sub-pixels B are alternately arranged to form a first sub-pixel row, and the second sub-pixels G form a second sub-pixel row;

[0074] In a second direction, the first sub-pixel rows and the second sub-pixel rows are arranged alternately, and the first direction is perpendicular or substantially perpendicular to the second direction;

[0075] Two first sub-pixels R and two third sub-pixels B distributed in two adjacent rows and two columns form a 2*2 matrix, in which the two first sub-pixels R are located in different rows and columns, the two third sub-pixels B are located in different rows and columns, a line connecting the centers of the two first sub-pixels R and the two third sub-pixels B forms a virtual quadrilateral, and the second sub-pixel G is located in the virtual quadrilateral;

[0076] At least two of the distances from the centers of the two first sub-pixels R and the centers of the two third sub-pixels B corresponding to the same virtual quadrilateral to the center of the second sub-pixel G are different;

[0077] The third sub-pixel B includes a symmetry axis along a first oblique direction and a symmetry axis along a second oblique direction, and the width of the third sub-pixel B in the first oblique direction is different from the width in the second oblique direction (one is W1 and the other is H1), wherein the second oblique direction is perpendicular or approximately perpendicular to the first oblique direction, and the second oblique direction intersects the first oblique direction, the first direction, and the second direction.

[0078] from Figure 2It can be seen that the adjacent first sub-pixel R and third sub-pixel B in the same row, together with a second sub-pixel G in the next row, form a virtual pixel (the triangle in the figure), and the adjacent virtual pixels in the same row share a first sub-pixel R or a third sub-pixel B.

[0079] In addition, from Figure 2 It can also be seen that in the embodiment of the present disclosure, the difference in the distances between the brightness centers of adjacent virtual pixels in the same row is smaller than the difference in the distances between the brightness centers of adjacent virtual pixels in the same row in the related art, that is, the brightness centers of the virtual pixels in the embodiment of the present disclosure are more evenly arranged.

[0080] In the disclosed embodiment, on the one hand, higher resolution can be achieved by sharing sub-pixels, and on the other hand, by setting the width of the third sub-pixel in different diagonal directions to be different, at least two of the distances from the centers of the two first sub-pixels and the centers of the two third sub-pixels in the virtual quadrilateral to the center of the second sub-pixel are different, thereby achieving a more uniform arrangement of the brightness center of the virtual pixel, avoiding the graininess and distortion of the display, and improving the display effect. On the other hand, there is no need to move the position of the sub-pixel to cause the brightness center of the virtual pixel to be displaced, and the implementation cost is relatively low.

[0081] In the embodiment of the present disclosure, optionally, at least two of the distances from the centers of the two first sub-pixels and the centers of the two third sub-pixels corresponding to the same virtual quadrilateral to the center of the second sub-pixel are the same.

[0082] In the disclosed embodiment, optionally, the internal angle range of the virtual quadrilateral is 70°-120°.

[0083] In the disclosed embodiment, optionally, two first sub-pixels and two third sub-pixels corresponding to the same virtual quadrilateral surround a second sub-pixel, and the closest distances from other first sub-pixels and third sub-pixels outside the virtual quadrilateral to the second sub-pixel are greater than the closest distances from the two first sub-pixels and the two third sub-pixels to the second sub-pixel. The distance may be the boundary distance of the sub-pixels. In addition, if the sub-pixel graphics have rounded corners, the distance of the rounded corners may have partial deviations, so the distance size needs to take into account the error caused by the rounded corners, or the measurement error, such as a deviation of about 3 microns, which is considered equivalent.

[0084] In the disclosed embodiment, optionally, the ratio of any two of the distances from the centers of the two first sub-pixels and the centers of the two third sub-pixels corresponding to the same virtual quadrilateral to the center of the second sub-pixel is in the range of 0.7-1.3.

[0085] In the embodiment of the present disclosure, optionally, the difference in spacing between the centers of the two first sub-pixels corresponding to the same virtual quadrilateral and the center of the second sub-pixel is smaller than the difference in spacing between the centers of the two third sub-pixels corresponding to the virtual quadrilateral and the center of the second sub-pixel.

[0086] Further optionally, the distances between the centers of the two first sub-pixels corresponding to the same virtual quadrilateral and the center of the second sub-pixel are equal or approximately equal.

[0087] In the embodiment of the present disclosure, optionally, the difference in distances from the centers of the two first sub-pixels corresponding to the same virtual quadrilateral to the center of the second sub-pixel is smaller than the difference in distances from the centers of the two third sub-pixels corresponding to the virtual quadrilateral to the center of the second sub-pixel.

[0088] Optionally, the distances between the centers of the two first sub-pixels and the centers of the two third sub-pixels corresponding to the same virtual quadrilateral and the center of the second sub-pixel are 20-60 μm. Further, the distances between the centers of the two first sub-pixels and the centers of the two third sub-pixels corresponding to the same virtual quadrilateral and the center of the second sub-pixel are 25-50 μm, or 30-48 μm.

[0089] In the embodiment of the present disclosure, optionally, the first sub-pixel and the third sub-pixel have different shapes. For example, one is a square and the other is a rectangle, or the first sub-pixel and the third sub-pixel are both rectangles but have different aspect ratios.

[0090] In the embodiment of the present disclosure, optionally, when the first sub-pixel and / or the third sub-pixel is a rectangle, the aspect ratio may be 1.2 to 1.8.

[0091] In the embodiment of the present disclosure, optionally, the aspect ratio of the second sub-pixel may be 1.2 to 1.3.

[0092] In the embodiment of the present disclosure, optionally, the first sub-pixel and the third sub-pixel are both axially symmetrical figures, and a symmetry axis of at least one of the first sub-pixels and a symmetry axis of at least one of the third sub-pixels are parallel and do not overlap; and / or,

[0093] The first sub-pixel has a symmetry axis in a first oblique direction, and the symmetry axes of two adjacent first sub-pixels in the first oblique direction do not overlap; and / or,

[0094] The third sub-pixel has a symmetry axis in a first oblique direction, and the symmetry axes of two third sub-pixels adjacent to each other in the first oblique direction do not overlap in the first oblique direction.

[0095] In the above embodiment, it is mentioned that in the virtual quadrilateral, there are at least two differences in the distances from the centers of the two first sub-pixels R and the centers of the two third sub-pixels B to the center of the second sub-pixel G, which are explained below with examples.

[0096] In some embodiments of the present disclosure, optionally, please refer to Figure 3 In the first embodiment of the present disclosure, within at least one of the virtual quadrilaterals (see Figure 3 The distance D1 between the center of the second subpixel G and the center of the first third subpixel B is not equal to the distance D2 between the center of the second subpixel G and the center of the second third subpixel B, and the distance between the center of the second subpixel G and the center of the first first subpixel R is approximately equal to the distance between the center of the second subpixel G and the center of the second first subpixel R, both of which are D3. Optionally, D2 is greater than D1. Optionally, D1 is greater than D3.

[0097] In some embodiments of the present disclosure, optionally, please refer to Figure 3 and Figure 4 , in at least one of the virtual quadrilaterals (see Figure 3 The two virtual quadrilaterals on the right, Figure 4 The distance between the center of the second sub-pixel and the centers of the two third sub-pixels is approximately equal, both being D1 or D2, and the distance between the center of the second sub-pixel and the centers of the two first sub-pixels is approximately equal, both being D3. Optionally, D2 is greater than D1. Optionally, D1 is greater than D3.

[0098] Above Figure 3 In the first embodiment shown, the third sub-pixels B located in the same row have the same width in the first oblique direction (that is, the direction of the long sides is the same), the third sub-pixels B located in the same column have the same width in the first oblique direction (that is, the direction of the long sides is the same), and the third sub-pixels B located in adjacent rows and columns have different widths in the first oblique direction (that is, the directions of the long sides are perpendicular or substantially perpendicular to each other, Figure 3 The direction of the long side is indicated by a dotted arrow).

[0099] Above Figure 4 In the second embodiment shown, the widths of all third sub-pixels B in the first oblique direction are the same (ie, the directions of the long sides are the same, Figure 4 The direction of the long side is indicated by a dotted arrow).

[0100] Above Figure 3 and Figure 4In the illustrated embodiment, the first sub-pixel R and the third sub-pixel B in the same row are not on the same straight line, and the first sub-pixel R and the third sub-pixel B in the same column are not on the same straight line.

[0101] In the embodiment of the present disclosure, four virtual quadrilaterals arranged in an array constitute a virtual polygon (which can be a virtual quadrilateral or a virtual octagon, etc.), and the first sub-pixel and the third sub-pixel are located at the vertex or edge of the virtual polygon, and are alternately distributed on the edge or vertex position of the virtual polygon in a clockwise direction.

[0102] In the disclosed embodiment, within the virtual polygon, the centers of the third sub-pixels in the same row are approximately on a straight line parallel to the row direction, and / or the centers of the third sub-pixels in the same column are approximately on a straight line parallel to the column direction.

[0103] In the disclosed embodiment, within the virtual polygon, the centers of the second sub-pixels located in the same row are roughly on a straight line parallel to the row direction, and / or the centers of the second sub-pixels located in the same column are roughly on a straight line parallel to the column direction.

[0104] Above Figure 3 and Figure 4 In the embodiment shown, four virtual quadrilaterals arranged in an array form a virtual octagon, and the virtual octagon serves as a repeating unit. The centers of the four first sub-pixels R and the four third sub-pixels B are located at the vertices of the virtual octagon, and the first sub-pixels R and the third sub-pixels B are arranged alternately clockwise. One of the third sub-pixels B is located at the center of the virtual octagon.

[0105] In the embodiment of the present disclosure, optionally, within the virtual quadrilateral, the second sub-pixel G is substantially symmetrical with respect to the center line of the third sub-pixels B arranged adjacent to each other in the first oblique direction or the second oblique direction, that is, the second sub-pixel G is on the symmetry axis of the two third sub-pixels B. Optionally, as Figure 5 As shown, the width of one of the third sub-pixels B in the direction of the symmetry axis is smaller than the width in the direction of the other symmetry axis, and the width of the other third sub-pixel B in the direction of the symmetry axis is larger than the width in the direction of the other symmetry axis (that is, the long sides of the two third sub-pixels B in the virtual quadrilateral are perpendicular or substantially perpendicular), or, as Figure 6 As shown, the widths of the two third sub-pixels B in the direction of the symmetry axis are smaller than the widths in the direction of the other symmetry axis (ie, the long sides of the two third sub-pixels B in the virtual quadrilateral are parallel).

[0106] In different situations in the above embodiments, the spacing between sub-pixels in the virtual quadrilateral also changes, and at least in some virtual quadrilaterals, the spacing between two third sub-pixels B and the second sub-pixel G is different. This is described below with an example.

[0107] The so-called pitch between sub-pixels refers to the vertical distance between two adjacent parallel sides of a sub-pixel.

[0108] In some embodiments of the present disclosure, optionally, please refer to Figure 5 , in at least one of the virtual quadrilaterals ( Figure 5 The two virtual quadrilaterals on the left side of the figure), the distance between the second sub-pixel G and the first of the third sub-pixels B is L1, the distance between the second sub-pixel G and the center of the second of the third sub-pixels B is L2, and the distances between the second sub-pixel G and the two first sub-pixels R are both L1, wherein L2 is greater than L1.

[0109] In some embodiments of the present disclosure, optionally, please refer to Figure 5 and Figure 6 , in at least one of the virtual quadrilaterals, the distance between the second sub-pixel G and the two third sub-pixels B, and the distance between the two first sub-pixels R are both L1( Figure 5 The two virtual quadrilaterals on the right side of Figure 6 The other three virtual quadrilaterals except the upper left corner are all L2 (not shown in the figure), where L2 is greater than L1.

[0110] In some embodiments of the present disclosure, optionally, please refer to Figure 6 ( Figure 6 A virtual quadrilateral at the upper left corner), within at least one of the virtual quadrilaterals, the distance between the second sub-pixel G and the two third sub-pixels B is L2, and the distance between the second sub-pixel G and the two first sub-pixels R is L1, wherein L2 is greater than L1.

[0111] In the above embodiment, optionally, the difference between L2 and L1 is greater than or equal to 1 μm, and further optionally, the difference between L2 and L1 is greater than or equal to 2 μm or 3 μm.

[0112] In the above embodiment, optionally, the range of L1 is 12 to 30 μm, further optionally, the range of L1 is 14 to 28 μm, further optionally, the range of L1 is 16 to 26 μm.

[0113] In the embodiment of the present disclosure, optionally, all the internal angles of the virtual quadrilateral are in the range of 70° to 120°. Further optionally, the internal angles of the virtual quadrilateral include at least one obtuse angle or at least one acute angle.

[0114] In the embodiments of the present disclosure, it is optional, please refer to Figure 3 and Figure 5 , the virtual quadrilateral is a right trapezoid, two internal angles are 90°, and the other two internal angles are obtuse angles, X°, and acute angles, Y°. The obtuse angle ranges from greater than 90° to less than or equal to 100°, and further optionally, from 91° to 96°, and the acute angle ranges from greater than or equal to 80° to greater than 90°, and further optionally, from 84° to 89°.

[0115] from Figure 3 and Figure 5 It can be seen from the figure that a virtual quadrilateral can be overlapped with the diagonal virtual quadrilateral by rotating 90°+X° or 90°+Y° around the center of the third sub-pixel located at the center of the virtual octagon.

[0116] In the disclosed embodiment, optionally, part of the virtual quadrilateral is a first parallelogram, and part of the virtual quadrilateral is a second parallelogram. In the row direction and the column direction, the first parallelogram and the second parallelogram are arranged alternately, and the interior angles of the first parallelogram and the second parallelogram are different. The angles of at least one interior angle of the first parallelogram and the second parallelogram are different, and the four interior angles may be different, or the interior angles may be the same angle, but their orientations are different. Different orientations refer to that at least one of the two sides constituting the first interior angle and the two sides constituting the second interior angle is not parallel.

[0117] Optionally, the second parallelogram may be a rectangle, which includes a long rectangle and a square.

[0118] In the embodiments of the present disclosure, it is optional, please refer to Figure 4 and Figure 6 , wherein some of the virtual quadrilaterals are parallelograms, and some of the virtual quadrilaterals are squares, and in the row direction and the column direction, the parallelograms and the squares are arranged alternately.

[0119] In the embodiment of the present disclosure, optionally, the acute angle Z of the first parallelogram and the second parallelogram is in the range of greater than or equal to 70° and less than 90°, and further optionally, in the range of 84°-89°.

[0120] from Figure 4 and Figure 6 It can be seen that in a virtual octagon, the two diagonal virtual quadrilaterals are parallelograms, and the other two diagonal virtual quadrilaterals are squares. The two squares are the same, and the two parallelograms are different.

[0121] In the above embodiment, optionally, the difference between the width of the third sub-pixel in the first oblique direction and the second oblique direction is greater than or equal to 1 μm, and further optionally, greater than or equal to 3 μm.

[0122] In the above embodiment, optionally, the first sub-pixel R is a square.

[0123] In the embodiment of the present disclosure, optionally, the shape of the third sub-pixel B is changed by removing a certain width of the third sub-pixel B in the first oblique direction or the second oblique direction (the blank area on one side of the third sub-pixel B in the figure is the removed area) to achieve at least two differences in the distances from the centers of the two first sub-pixels R and the centers of the two third sub-pixels B in the virtual quadrilateral to the center of the second sub-pixel G, respectively.

[0124] Please refer to Figure 7 and Figure 8 In the figure, the frames around the first sub-pixel R, the second sub-pixel G and the third sub-pixel B are the opening areas of the light-emitting layer. After a certain width of the third sub-pixel B is removed in the first oblique direction or the second oblique direction, the distance between the removed side and the boundary of the opening area of ​​the peripheral light-emitting layer is m1, which is greater than the distance m2 between the other sides and the boundary of the opening area of ​​the peripheral light-emitting layer.

[0125] The above embodiments are only examples. In a virtual octagon, the edges of the third sub-pixels B whose widths are removed are not limited thereto and can be combined arbitrarily. Figure 9-13 . refer to Figure 7-Figure 13 A third sub-pixel B may remove a certain width at any one of the two sides perpendicular to the first oblique line direction and the two sides parallel to the first oblique line direction.

[0126] Please refer to Fig.14 , Embodiment 3 of the present disclosure provides a display substrate, including: a first sub-pixel R, a second sub-pixel G and a third sub-pixel B;

[0127] In a first direction, the first sub-pixels R and the third sub-pixels B are alternately arranged to form a first sub-pixel row, and the second sub-pixels G form a second sub-pixel row;

[0128] In a second direction, the first sub-pixel rows and the second sub-pixel rows are arranged alternately, and the first direction is perpendicular or substantially perpendicular to the second direction;

[0129] Two first sub-pixels R and two third sub-pixels B distributed in two adjacent rows and two columns form a 2*2 matrix, in which the two first sub-pixels R are located in different rows and columns, the two third sub-pixels B are located in different rows and columns, a line connecting the centers of the two first sub-pixels R and the two third sub-pixels B forms a virtual quadrilateral, and the second sub-pixel G is located in the virtual quadrilateral;

[0130] At least two of the distances from the centers of the two first sub-pixels R and the centers of the two third sub-pixels B corresponding to the same virtual quadrilateral to the center of the second sub-pixel G are different;

[0131] The first subpixel R includes a symmetry axis along a first oblique direction and an axis of symmetry along a second oblique direction, and the width in the first oblique direction is different from the width in the second oblique direction (one is W2 and the other is H2), wherein the second oblique direction is perpendicular or approximately perpendicular to the first oblique direction, and the second oblique direction intersects the first oblique direction, the first direction and the second direction.

[0132] from Fig.14 It can be seen that the adjacent first sub-pixel R and third sub-pixel B in the same row, together with a second sub-pixel G in the next row, form a virtual pixel (the triangle in the figure), and the adjacent virtual pixels in the same row share a first sub-pixel R or a third sub-pixel B.

[0133] In the disclosed embodiment, on the one hand, higher resolution can be achieved by sharing sub-pixels, and on the other hand, by setting the widths of the first sub-pixels in different diagonal directions to be different, at least two of the distances from the centers of the two first sub-pixels and the centers of the two third sub-pixels in the virtual quadrilateral to the center of the second sub-pixel are different, thereby achieving a more uniform arrangement of the brightness centers of the virtual pixels, avoiding the graininess and distortion of the display, and improving the display effect. On the other hand, there is no need to move the position of the sub-pixels to displace the brightness center of the virtual pixels, and the implementation cost is relatively low.

[0134] In the above embodiment, it is mentioned that in the virtual quadrilateral, there are at least two differences in the distances from the centers of the two first sub-pixels R and the centers of the two third sub-pixels B to the center of the second sub-pixel G, which are explained below with examples.

[0135] In some embodiments of the present disclosure, optionally, please refer to Figure 7 ( Figure 7Two virtual quadrilaterals on the right), in at least one of the virtual quadrilaterals, the distance between the center of the second sub-pixel G and the center of the first third sub-pixel B is approximately equal to the distance between the center of the second sub-pixel G and the center of the second third sub-pixel B, both of which are D1, and the distance D3 between the center of the second sub-pixel G and the center of the first first sub-pixel R is different from the distance D4 between the center of the second sub-pixel G and the center of the second first sub-pixel R.

[0136] In some embodiments of the present disclosure, optionally, please refer to Fig.14 , in at least one of the virtual quadrilaterals ( Fig.14 Two virtual quadrilaterals on the left), the distance between the center of the second sub-pixel G and the center of the first third sub-pixel B is approximately equal to the distance between the center of the second sub-pixel G and the center of the second third sub-pixel B, both of which are D1, and the distance between the center of the second sub-pixel G and the center of the first first sub-pixel R is approximately equal to the distance between the center of the second sub-pixel G and the center of the second first sub-pixel R, both of which are D3.

[0137] Above Fig.14 In the third embodiment shown, the first sub-pixels R located in the same row have the same width in the first oblique direction (that is, the direction of the long sides is the same), the third sub-pixels B located in the same column have the same width in the first oblique direction (that is, the direction of the long sides is the same), and the first sub-pixels R located in adjacent rows and columns have different widths in the first oblique direction (that is, the directions of the long sides are perpendicular or substantially perpendicular to each other, Fig.14 The direction of the long side is indicated by a dotted arrow).

[0138] Of course, in some other embodiments of the present disclosure, optionally, the widths of all first sub-pixels R in the first oblique direction are the same (that is, the directions of the long sides are the same).

[0139] Above Fig.14 In the illustrated embodiment, the first sub-pixel R and the third sub-pixel B in the same row are not on the same straight line, and the first sub-pixel R and the third sub-pixel B in the same column are not on the same straight line.

[0140] In the embodiment of the present disclosure, four virtual quadrilaterals arranged in an array constitute a virtual polygon (which can be a virtual quadrilateral or a virtual octagon, etc.), and the first sub-pixel and the third sub-pixel are located at the vertex or edge of the virtual polygon, and are alternately distributed on the edge or vertex position of the virtual polygon in a clockwise direction.

[0141] In the disclosed embodiment, within the virtual polygon, the centers of the third sub-pixels in the same row are approximately on a straight line parallel to the row direction, and / or the centers of the third sub-pixels in the same column are approximately on a straight line parallel to the column direction.

[0142] In the disclosed embodiment, within the virtual polygon, the centers of the second sub-pixels located in the same row are roughly on a straight line parallel to the row direction, and / or the centers of the second sub-pixels located in the same column are roughly on a straight line parallel to the column direction.

[0143] Above Fig.14 In the embodiment shown, four virtual quadrilaterals arranged in an array form a virtual octagon, and the virtual octagon serves as a repeating unit. The centers of the four first sub-pixels R and the four third sub-pixels B are located at the vertices of the virtual octagon, and the first sub-pixels R and the third sub-pixels B are arranged alternately clockwise. One of the third sub-pixels B is located at the center of the virtual octagon.

[0144] In the embodiment of the present disclosure, optionally, within the virtual quadrilateral, the second sub-pixel G is substantially symmetrical with respect to the center line connecting two first sub-pixels R adjacently arranged in the second oblique direction or the first oblique direction, that is, the second sub-pixel G is on the symmetry axis of the two first sub-pixels B. Optionally, as Fig.14 As shown, the width of one of the first sub-pixels R in the direction of the symmetry axis is smaller than the width in the direction on the other symmetry axis, the width of the other first sub-pixel R in the direction of the symmetry axis is larger than the width in the direction on the other symmetry axis (i.e., the long sides of the two third sub-pixels B in the virtual quadrilateral are perpendicular or approximately perpendicular), or, the widths of the two first sub-pixels R in the direction of the symmetry axis are both smaller than the widths in the direction on the other symmetry axis (i.e., the long sides of the two first sub-pixels R in the virtual quadrilateral are parallel).

[0145] In different situations in the above embodiments, the spacing between sub-pixels in the virtual quadrilateral also changes, and at least in some virtual quadrilaterals, the spacing between two first sub-pixels R and the second sub-pixel G is different. This is described below with an example.

[0146] In some embodiments of the present disclosure, optionally, please refer to Fig.15 , in at least one of the virtual quadrilaterals, the distance between the second sub-pixel G and the two third sub-pixels B, and the distance between the two first sub-pixels R are both L1( Fig.15 The two virtual quadrilaterals on the left) are either L2 (not shown), where L2 is greater than L1.

[0147] In some embodiments of the present disclosure, optionally, please refer to Fig.15 , in at least one of the virtual quadrilaterals ( Figure 8Two virtual quadrilaterals on the right), the distance between the second sub-pixel G and the two third sub-pixels B is L1, the distance between the second sub-pixel G and the first of the first sub-pixels R is L1, and the distance between the second sub-pixel G and the second of the first sub-pixel R is L2, wherein L2 is greater than L1.

[0148] In the above embodiment, optionally, the difference between L2 and L1 is greater than or equal to 1 μm, and further optionally, the difference between L2 and L1 is greater than or equal to 2 μm or 3 μm.

[0149] In the above embodiment, optionally, the range of L1 is 12 to 30 μm, further optionally, the range of L1 is 14 to 28 μm, further optionally, the range of L1 is 16 to 26 μm.

[0150] In the embodiments of the present disclosure, it is optional, please refer to Fig.14 , the virtual quadrilateral is a right trapezoid, two internal angles are 90°, and the other two internal angles are obtuse angles, X°, and acute angles, Y°. The obtuse angle ranges from greater than 90° to less than or equal to 100°, and further optionally, from 91° to 96°, and the acute angle ranges from greater than or equal to 80° to greater than 90°, and further optionally, from 84° to 89°.

[0151] from Fig.14 It can be seen from the figure that a virtual quadrilateral can be overlapped with the focused virtual quadrilateral by rotating 90°+X° or 90°+Y° around the center of the third sub-pixel located at the center of the virtual octagon.

[0152] In the above embodiment, optionally, the difference between the width of the first sub-pixel in the first oblique direction and the width of the second oblique direction is greater than or equal to 1 μm, and further optionally, greater than or equal to 3 μm.

[0153] Above Fig.14 and Fig.15 In the illustrated embodiment, optionally, the third sub-pixel B is a square.

[0154] Above Figure 3-Figure 6 In the embodiment shown, the width of the third sub-pixel is different in different oblique directions. Fig.14 As in the embodiment shown in Figure 15, the widths of the first sub-pixel in different oblique directions are different. In some other embodiments of the present disclosure, the widths of the first sub-pixel and the third sub-pixel in different oblique directions may also be different.

[0155] In the above embodiments of the present disclosure, optionally, the width of the second sub-pixel G in the first oblique direction and the second oblique direction are different.

[0156] In the above-mentioned embodiments of the present disclosure, optionally, within one of the virtual quadrilaterals, the second sub-pixel G is roughly symmetrical with respect to a center line connecting two of the third sub-pixels B arranged adjacent to each other in the first oblique direction or the second oblique direction, and is roughly symmetrical with respect to a center line connecting two of the first sub-pixels R arranged adjacent to each other in the second oblique direction or the first oblique direction.

[0157] The human eye has different resolution capabilities for the first sub-pixel R, the second sub-pixel G and the third sub-pixel B, and the brightness effects of the three sub-pixels are also different, among which the second sub-pixel G has the largest brightness effect, followed by the first sub-pixel R, and the third sub-pixel B has the smallest brightness effect; at the same time, the device lifespans of organic light-emitting materials of different colors are different, so, optionally, the total opening area of ​​the sub-pixels: the third sub-pixel B> the second sub-pixel G> the first sub-pixel R. That is, the total opening areas of the third sub-pixel B, the second sub-pixel G and the first sub-pixel R decrease in sequence, the total opening area of ​​the first sub-pixel R is x, the total opening area of ​​the second sub-pixel G is a*x, and the total opening area of ​​the third sub-pixel B is b*x, wherein 0.5≤a≤0.8, 1≤b≤2.2. In the disclosed embodiment, the total opening area of ​​the sub-pixels refers to the total light-emitting area of ​​the sub-pixels on the entire panel. In the above-mentioned embodiments of the present disclosure, the shapes of the first sub-pixel, the second sub-pixel and the third sub-pixel are quadrilaterals with rounded corners. In some other embodiments of the present disclosure, optionally, the shapes of the first sub-pixel, the second sub-pixel and the third sub-pixel may also be other polygons; or, the shapes of the first sub-pixel, the second sub-pixel and the third sub-pixel may also be selected from any one of other types of polygons with rounded corners, circles, and ellipses.

[0158] In some other embodiments of the present disclosure, optionally, the shapes of the first sub-pixel, the second sub-pixel and the third sub-pixel can also be selected from any one of a quadrilateral, a hexagon, an octagon, a hexagon with rounded corners or an octagon with rounded corners, a circle, and an ellipse.

[0159] In the above-mentioned embodiments of the present disclosure, the first sub-pixel is a red sub-pixel (R), the second sub-pixel is a green sub-pixel (G), and the third sub-pixel is a blue sub-pixel (B). The present disclosure does not exclude the use of sub-pixels of other colors.

[0160] In the above-mentioned embodiments of the present disclosure, the ratio of the number of the first sub-pixel, the second sub-pixel and the third sub-pixel is 1:2:1, thereby achieving sub-pixel sharing and improving resolution.

[0161] The embodiment of the present disclosure also provides a display device, comprising the above-mentioned display substrate.

[0162] In the embodiment of the present disclosure, optionally, the display device also includes a pixel defining layer, the pixel defining layer includes a plurality of pixel defining layer openings, each of the first sub-pixels, each of the second sub-pixels, and each of the third sub-pixels respectively corresponds to a pixel defining layer opening, and the shapes of the first sub-pixels, the second sub-pixels, and the third sub-pixels are substantially the same as the shapes of the openings of the corresponding pixel defining layers.

[0163] In the embodiment of the present disclosure, optionally, the first sub-pixel includes a multi-layer film layer, and the multi-layer film layer of the first sub-pixel at least partially covers the area outside the pixel defining layer opening; and / or the second sub-pixel includes a multi-layer film layer, and the multi-layer film layer of the second sub-pixel at least partially covers the area outside the pixel defining layer opening; and / or the third sub-pixel includes a multi-layer film layer, and the multi-layer film layer of the third sub-pixel at least partially covers the area outside the pixel defining layer opening.

[0164] In the embodiment of the present disclosure, optionally, at least part of the shape or area of ​​the opening of the pixel defining layer is different.

[0165] In the embodiment of the present disclosure, optionally, the pixel defining layer opening corresponding to the first sub-pixel or the third sub-pixel has at least a partial shape or area different from that of the first sub-pixel or the third sub-pixel.

[0166] In the embodiment of the present disclosure, optionally, the shortest distances from at least part of the openings of the pixel defining layer corresponding to the first sub-pixel or the third sub-pixel to the adjacent openings are unequal.

[0167] The disclosed embodiment also provides a high-precision metal mask for manufacturing the display substrate in any of the above embodiments, wherein the first sub-pixel includes a multi-layer film layer, the second sub-pixel includes a multi-layer film layer, and the third sub-pixel includes a multi-layer film layer, and the mask includes: a plurality of opening areas, wherein the plurality of opening areas include a first opening area corresponding to the shape and distribution of at least one film layer in the first sub-pixel, or a second opening area corresponding to the shape and distribution of at least one film layer in the second sub-pixel, or a third opening area corresponding to the shape and distribution of at least one film layer in the third sub-pixel.

[0168] Here, shape refers to the type and / or size of the graphic, and distribution refers to the spacing, orientation and / or density, etc.

[0169] Please refer to Figure 16-Figure 18 , is a schematic diagram of a high-precision metal mask for respectively manufacturing the first sub-pixel, the second sub-pixel and the third sub-pixel of the display substrate in the above-mentioned embodiment, in which the first sub-pixel, the second sub-pixel or the third sub-pixel is shown in the opening area of ​​the submerged plate, and the first sub-pixel, the second sub-pixel or the third sub-pixel is not part of the mask.

[0170] In some embodiments, a first sub-pixel includes a first effective light-emitting area, a second sub-pixel includes a second effective light-emitting area, a third sub-pixel includes a third effective light-emitting area, and the area of ​​a second effective light-emitting area < a first effective light-emitting area < a third effective light-emitting area. On a display substrate, the total area of ​​all third effective light-emitting areas included in the third sub-pixel> the total area of ​​all third effective light-emitting areas included in the second sub-pixel> the total area of ​​all third effective light-emitting areas included in the first sub-pixel. In some embodiments, each first effective light-emitting area, each second effective light-emitting area, and each third effective light-emitting area are separated. In some embodiments, each first effective light-emitting area, each second effective light-emitting area, and each third effective light-emitting area are defined by a plurality of separated openings formed in the pixel defining layer. In some embodiments, each first effective light-emitting area is defined by a light-emitting layer in a corresponding first sub-pixel, located between an opposite anode and a cathode in a direction perpendicular to the substrate, and driven to emit light. In some embodiments, each second effective light-emitting area is defined by a light-emitting layer in a corresponding second sub-pixel, located between an opposite anode and a cathode in a direction perpendicular to the substrate, and driven to emit light. In some embodiments, each third effective light-emitting area is defined by a light-emitting layer in a corresponding third sub-pixel, located between an opposite anode and a cathode in a direction perpendicular to the substrate, and driven to emit light. In some embodiments, each first effective light-emitting area, each second effective light-emitting area, and each third effective light-emitting area are defined by a corresponding light-emitting layer and an electrode (anode or cathode) or a portion of an electrode that has carrier (hole or electron) transmission with the corresponding light-emitting layer. In some embodiments, each first effective light-emitting area, each second effective light-emitting area, and each third effective light-emitting area are defined by at least a portion of a cathode and at least a portion of an anode whose orthographic projections overlap on the substrate, and at least a portion of the cathode and at least a portion of the anode do not overlap with the orthographic projection of the first insulating layer on the substrate, and the first insulating layer is located between the cathode and the anode in a direction perpendicular to the substrate. For example, the first insulating layer includes a pixel defining layer. In some embodiments, each first sub-pixel, each second sub-pixel and each third sub-pixel respectively include a first electrode, a light-emitting layer located on a side of the first electrode away from the substrate, and a second electrode located on a side of the light-emitting layer away from the first electrode. In a direction perpendicular to the substrate, a second insulating layer is also arranged between the first electrode and the light-emitting layer, and / or between the second electrode and the light-emitting layer. The second insulating layer overlaps with the projection of the first electrode or the second electrode on the substrate, and the second insulating layer has an opening. The opening of the second insulating layer on the side facing the light-emitting layer can expose at least a portion of the first electrode or the second electrode so that it can contact the light-emitting layer or the functional layer assisting in light emission. Each first effective light-emitting area, each second effective light-emitting area and each third effective light-emitting area is defined by a portion of the first electrode or the second electrode that contacts the light-emitting layer or the functional layer assisting in light emission.In some embodiments, the second insulating layer includes a pixel defining layer. In some embodiments, the auxiliary light-emitting functional layer may be any one or more of a hole injection layer, a hole transport layer, an electron transport layer, a hole blocking layer, an electron blocking layer, an electron injection layer, an auxiliary light-emitting layer, an interface improvement layer, an anti-reflection layer, etc. In some embodiments, the first electrode may be an anode and the second electrode may be a cathode. In some embodiments, the first electrode may include at least two layers of indium tin oxide (ITO) and silver (A) g, such as a three-layer stack of ITO, Ag, and ITO. In some embodiments, the second electrode may include any one or more of magnesium (Mg), Ag, ITO, and indium zinc oxide (IZO), such as a mixed layer or alloy layer of Mg and Ag. Each sub-pixel includes a light-emitting layer, each first sub-pixel includes a first color light-emitting layer located in an opening and on a pixel defining layer, each second sub-pixel includes a second color light-emitting layer located in an opening and on a pixel defining layer, and each third sub-pixel includes a third color light-emitting layer located in an opening and on a pixel defining layer.

[0171] Please refer to Figure 8 , Figure 8 In the figure, the first effective light-emitting area of ​​the first sub-pixel is the area indicated by the arrow corresponding to R, the second effective light-emitting area of ​​the second sub-pixel is the area indicated by the arrow corresponding to G, the third effective light-emitting area of ​​the third sub-pixel is the area indicated by the arrow corresponding to B, and the frame around the effective light-emitting area is the area of ​​the corresponding light-emitting layer.

[0172] In some exemplary embodiments, the preparation process of the display substrate of this embodiment may include the following steps (1) to (9). In this exemplary embodiment, please refer to Fig.19 , taking a flexible display substrate with a top emission structure as an example for explanation.

[0173] (1) Prepare a substrate on a glass carrier.

[0174] In some exemplary embodiments, the substrate 10 may be a flexible substrate, for example, including a first flexible material layer, a first inorganic material layer, a semiconductor layer, a second flexible material layer, and a second inorganic material layer stacked on a glass carrier 1. The first flexible material layer and the second flexible material layer are made of materials such as polyimide (PI), polyethylene terephthalate (PET), or a surface-treated polymer soft film. The first inorganic material layer and the second inorganic material layer are made of silicon nitride (SiNx) or silicon oxide (SiOx), etc., to improve the water and oxygen resistance of the substrate. The first inorganic material layer and the second inorganic material layer are also referred to as barrier layers. The semiconductor layer is made of amorphous silicon (a-si). In some exemplary embodiments, taking the stacked structure PI1 / Barrier1 / a-si / PI2 / Barrier2 as an example, its preparation process includes: first coating a layer of polyimide on the glass carrier 1, and forming a first flexible (PI1) layer after curing; then depositing a barrier film on the first flexible layer to form a first barrier (Barrier1) layer covering the first flexible layer; then depositing a layer of amorphous silicon film on the first barrier layer to form an amorphous silicon (a-si) layer covering the first barrier layer; then coating the amorphous silicon layer with another layer of polyimide, and forming a second flexible (PI2) layer after curing; then depositing a barrier film on the second flexible layer to form a second barrier (Barrier2) layer covering the second flexible layer, thereby completing the preparation of the substrate 10.

[0175] (2) Prepare a driving structure layer on the substrate. The driving structure layer includes a plurality of driving circuits, each of which includes a plurality of transistors and at least one storage capacitor, such as a 2T1C, 3T1C or 7T1C design.

[0176] In some exemplary embodiments, the manufacturing process of the driving structure layer may refer to the following description: The manufacturing process of the driving circuit of the first sub-pixel 21 is taken as an example for description.

[0177] A first insulating film and an active layer film are sequentially deposited on the base substrate 10, and the active layer film is patterned through a patterning process to form a first insulating layer 11 covering the entire base substrate 10, and an active layer pattern is arranged on the first insulating layer 11, and the active layer pattern includes at least a first active layer.

[0178] Subsequently, a second insulating film and a first metal film are deposited in sequence, and the first metal film is patterned through a patterning process to form a second insulating layer 12 covering the active layer pattern, and a first gate metal layer pattern arranged on the second insulating layer 12, wherein the first gate metal layer pattern includes at least a first gate electrode and a first capacitor electrode.

[0179] Subsequently, a third insulating film and a second metal film are deposited in sequence, and the second metal film is patterned through a patterning process to form a third insulating layer 13 covering the first gate metal layer, and a second gate metal layer pattern arranged on the third insulating layer 13, the second gate metal layer pattern at least includes a second capacitor electrode, and the position of the second capacitor electrode corresponds to the position of the first capacitor electrode.

[0180] Subsequently, a fourth insulating film is deposited and patterned through a patterning process to form a fourth insulating layer 14 pattern covering the second gate metal layer. At least two first via holes are opened on the fourth insulating layer 14. The fourth insulating layer 14, the third insulating layer 13 and the second insulating layer 12 in the two first via holes are etched away to expose the surface of the first active layer.

[0181] Subsequently, a third metal film is deposited and patterned by a patterning process to form a source-drain metal layer pattern on the fourth insulating layer 14. The source-drain metal layer includes at least a first source electrode and a first drain electrode located in the display area. The first source electrode and the first drain electrode can be connected to the first active layer through first vias, respectively.

[0182] In the driving circuit of the first sub-pixel 21 in the display area, the first active layer, the first gate electrode, the first source electrode and the first drain electrode can constitute the first transistor 210, and the first capacitor electrode and the second capacitor electrode can constitute the first storage capacitor 212. In the above preparation process, the driving circuit of the second sub-pixel 22 and the driving circuit of the third color sub-pixel 23 can be formed at the same time.

[0183] In some exemplary embodiments, the first insulating layer 11, the second insulating layer 12, the third insulating layer 13 and the fourth insulating layer 14 are made of any one or more of silicon oxide (SiOx), silicon nitride (SiNx) and silicon oxynitride (SiON), and can be a single layer, a multilayer or a composite layer. The first insulating layer 11 is called a buffer layer, which is used to improve the water and oxygen resistance of the substrate; the second insulating layer 12 and the third insulating layer 13 are called gate insulating (GI, Gate Insulator) layers; the fourth insulating layer 14 is called an interlayer insulating (ILD, Interlayer Dielectric) layer. The first metal film, the second metal film and the third metal film are made of metal materials, such as any one or more of silver (Ag), copper (Cu), aluminum (Al), titanium (Ti) and molybdenum (Mo), or alloy materials of the above metals, such as aluminum neodymium alloy (AlNd) or molybdenum niobium alloy (MoNb), and can be a single layer structure, or a multilayer composite structure, such as Ti / Al / Ti, etc. The active layer film adopts one or more materials such as amorphous indium gallium zinc oxide material (a-IGZO), zinc oxynitride (ZnON), indium zinc tin oxide (IZTO), amorphous silicon (a-Si), polycrystalline silicon (p-Si), sexithiophene, polythiophene, etc., that is, the present disclosure is applicable to transistors manufactured based on oxide technology, silicon technology and organic technology.

[0184] (3) Forming a flat layer on the base substrate on which the aforementioned pattern is formed.

[0185] In some exemplary embodiments, a flat thin film of an organic material is coated on the base substrate 10 on which the aforementioned pattern is formed to form a flat (PLN, Planarization) layer 15 covering the entire base substrate 10, and a plurality of second via holes K2 are formed on the flat layer 15 in the display area through masking, exposure, and development processes. The flat layer 15 in the plurality of second via holes K2 is developed away, exposing the surface of the first drain electrode of the first transistor 210 of the driving circuit of the first sub-pixel 21, the surface of the first drain electrode of the first transistor of the driving circuit of the second sub-pixel 22, and the surface of the first drain electrode of the first transistor of the driving circuit of the third color sub-pixel 23.

[0186] (4) On the substrate having the aforementioned pattern, a first electrode pattern is formed. In some examples, the first electrode is a reflective anode.

[0187] In some exemplary embodiments, a conductive film is deposited on the base substrate 10 on which the aforementioned pattern is formed, and the conductive film is patterned by a patterning process to form a first electrode pattern. The first anode 213 of the first sub-pixel 21 is connected to the first drain electrode of the first transistor 210 through the second via hole K2, the second anode 223 of the second sub-pixel 22 is connected to the first drain electrode of the first transistor of the second sub-pixel 22 through the second via hole K2, and the third anode 233 of the third color sub-pixel 23 is connected to the first drain electrode of the first transistor of the third color sub-pixel 23 through the second via hole K2.

[0188] In some examples, the first electrode can be made of a metal material, such as any one or more of magnesium (Mg), silver (Ag), copper (Cu), aluminum (Al), titanium (Ti) and molybdenum (Mo), or an alloy material of the above metals, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb). It can be a single-layer structure, or a multi-layer composite structure, such as Ti / Al / Ti, etc., or a stack structure formed by metal and transparent conductive material, such as reflective materials such as ITO / Ag / ITO, Mo / AlNd / ITO, etc.

[0189] (5) On the base substrate having the aforementioned pattern formed thereon, a pixel definition layer (PDL) pattern is formed.

[0190] In some exemplary embodiments, a pixel definition film is coated on the substrate 10 on which the aforementioned pattern is formed, and a pixel definition layer pattern is formed by masking, exposure, and development processes. The pixel definition layer 30 of the display area includes a plurality of sub-pixel definition parts 302, and a plurality of pixel definition layer openings 301 are formed between adjacent sub-pixel definition parts 302. The pixel definition layer 30 in the plurality of pixel definition layer openings 301 is developed to expose at least a portion of the surface of the first anode 213 of the first sub-pixel 21, at least a portion of the surface of the second anode 223 of the second sub-pixel 22, and at least a portion of the surface of the third anode 233 of the third color sub-pixel 23.

[0191] In some examples, the pixel definition layer 30 may be made of polyimide, acrylic, polyethylene terephthalate, or the like.

[0192] (6) Forming a post spacer (PS) pattern on the base substrate having the aforementioned pattern.

[0193] In some exemplary embodiments, an organic material film is coated on the base substrate 10 on which the aforementioned pattern is formed, and a spacer column 34 pattern is formed by masking, exposure, and development processes. The spacer column 34 can serve as a support layer configured to support the FMM during the evaporation process. In some examples, along the row arrangement direction of the sub-pixels, there is a repeating unit between two adjacent spacer columns 34, for example, the spacer column 34 can be located between the adjacent first sub-pixel 21 and the third color sub-pixel 23.

[0194] (7) On the substrate substrate having the aforementioned pattern, an organic functional layer and a second electrode are sequentially formed. In some examples, the second electrode is a transparent cathode. The light-emitting element can emit light from the side away from the substrate substrate 10 through the transparent cathode to achieve top emission. In some examples, the organic functional layer of the light-emitting element includes: a hole injection layer, a hole transport layer, a light-emitting layer, and an electron transport layer.

[0195] In some exemplary embodiments, an open mask is used on the substrate 10 on which the aforementioned pattern is formed to sequentially form a hole injection layer 241 and a hole transport layer 242 by evaporation, and then a blue light-emitting layer 236, a green light-emitting layer 216, and a red light-emitting layer 226 are sequentially formed by evaporation using FMM, and then an electron transport layer 243, a cathode 244, and an optical coupling layer 245 are sequentially formed by evaporation using an open mask. The hole injection layer 241, the hole transport layer 242, the electron transport layer 243, and the cathode 244 are all common layers of multiple sub-pixels. In some examples, the organic functional layer may further include: a microcavity adjustment layer located between the hole transport layer and the light-emitting layer. For example, after forming the hole transport layer, a blue microcavity adjustment layer, a blue light-emitting layer, a green microcavity adjustment layer, a green light-emitting layer, a red microcavity adjustment layer, and a red light-emitting layer may be sequentially formed by evaporation using FMM.

[0196] In some exemplary embodiments, the organic functional layer is formed in the sub-pixel region, and the organic functional layer is connected to the anode. The cathode is formed on the pixel definition layer and connected to the organic functional layer.

[0197] In some exemplary embodiments, the cathode can be made of any one or more of magnesium (Mg), silver (Ag), aluminum (Al), or an alloy made of any one or more of the above metals, or a transparent conductive material, such as indium tin oxide (ITO), or a multilayer composite structure of metal and transparent conductive material.

[0198] In some exemplary embodiments, a light coupling layer may be formed on the side of the cathode 244 away from the base substrate 10, and the light coupling layer may be a common layer of multiple sub-pixels. The light coupling layer may cooperate with the transparent cathode to increase the light output. For example, the material of the light coupling layer may be a semiconductor material. However, this embodiment is not limited to this.

[0199] (8) Forming a packaging layer on the base substrate having the aforementioned pattern.

[0200] In some exemplary embodiments, an encapsulation layer is formed on the base substrate 10 on which the aforementioned pattern is formed, and the encapsulation layer may include a first encapsulation layer 41, a second encapsulation layer 42, and a third encapsulation layer 43 stacked. The first encapsulation layer 41 is made of an inorganic material and covers the cathode 244 in the display area. The second encapsulation layer 42 is made of an organic material. The third encapsulation layer 43 is made of an inorganic material and covers the first encapsulation layer 41 and the second encapsulation layer 42. However, this embodiment is not limited to this. In some examples, the encapsulation layer may have a five-layer structure of inorganic / organic / inorganic / organic / inorganic.

[0201] The above are some implementation methods of the present disclosure. 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 described in the present disclosure. These improvements and modifications should also be regarded as the scope of protection of the present disclosure.

Claims

1. A display substrate, characterized in that: include: a first sub-pixel, a second sub-pixel and a third sub-pixel; In a first direction, the first sub-pixels and the third sub-pixels are alternately arranged to form a first sub-pixel row, and the second sub-pixels form a second sub-pixel row; In a second direction, the first sub-pixel rows and the second sub-pixel rows are arranged alternately, and the first direction is substantially perpendicular to the second direction; Two first sub-pixels and two third sub-pixels distributed in two adjacent rows and two columns form a 2*2 matrix, in which the two first sub-pixels are located in different rows and columns, the two third sub-pixels are located in different rows and columns, a line connecting the centers of the two first sub-pixels and the two third sub-pixels forms a virtual quadrilateral, and the second sub-pixel is located within the virtual quadrilateral; At least two of the distances from the centers of the two first sub-pixels and the centers of the two third sub-pixels corresponding to the same virtual quadrilateral to the center of the second sub-pixel are different; The third sub-pixel includes a symmetric axis along a first oblique direction and a symmetric axis along a second oblique direction, and a width of the third sub-pixel in the first oblique direction is different from a width in the second oblique direction; and / or the first sub-pixel includes a symmetric axis along a first oblique direction and a symmetric axis along a second oblique direction, and a width of the first sub-pixel in the first oblique direction is different from a width in the second oblique direction; The second oblique direction is substantially perpendicular to the first oblique direction, and the second oblique direction intersects the first oblique direction, the first direction and the second direction; The virtual quadrilateral is a right-angled trapezoid, two internal angles of which are 90°, and one of the other two internal angles is an obtuse angle and the other is an acute angle.

2. The display substrate according to claim 1, characterized in that: The internal angle range of the virtual quadrilateral is 70°-120°.

3. The display substrate according to claim 1, characterized in that: Two first sub-pixels and two third sub-pixels corresponding to the same virtual quadrilateral surround a second sub-pixel, and the closest distances from other first sub-pixels and third sub-pixels outside the virtual quadrilateral to the second sub-pixel are greater than the closest distances from the two first sub-pixels and the two third sub-pixels to the second sub-pixel.

4. The display substrate according to claim 1, characterized in that: The ratio of any two of the distances from the centers of the two first sub-pixels and the centers of the two third sub-pixels corresponding to the same virtual quadrilateral to the center of the second sub-pixel is in the range of 0.7-1.

3.

5. The display substrate according to claim 1, characterized in that: The difference in distances between the centers of the two first sub-pixels corresponding to the same virtual quadrilateral and the center of the second sub-pixel is smaller than the difference in distances between the centers of the two third sub-pixels corresponding to the virtual quadrilateral and the center of the second sub-pixel.

6. The display substrate according to claim 5, characterized in that: The distances between the centers of the two first sub-pixels corresponding to the same virtual quadrilateral and the center of the second sub-pixel are substantially equal.

7. The display substrate according to claim 1, characterized in that: The distances between the centers of the two first sub-pixels and the centers of the two third sub-pixels corresponding to the same virtual quadrilateral and the center of the second sub-pixel are respectively in the range of 20-60 μm.

8. The display substrate according to claim 1, characterized in that: The first sub-pixel and the third sub-pixel have different shapes.

9. The display substrate according to claim 1, characterized in that: The first sub-pixel and the third sub-pixel are both axially symmetrical shapes, and a symmetry axis of at least one of the first sub-pixels and a symmetry axis of at least one of the third sub-pixels are parallel and do not overlap; and / or, The first sub-pixel has a symmetry axis in a first oblique direction, and the symmetry axes of two adjacent first sub-pixels in the first oblique direction do not overlap; and / or, The third sub-pixel has a symmetry axis in a first oblique direction, and the symmetry axes of two third sub-pixels adjacent to each other in the first oblique direction do not overlap in the first oblique direction.

10. The display substrate according to claim 1, characterized in that: In at least one of the virtual quadrilaterals, the distances between the center of the second sub-pixel and the centers of the two third sub-pixels are not equal, and the distances between the center of the second sub-pixel and the centers of the two first sub-pixels are approximately equal; or In at least one of the virtual quadrilaterals, the distance between the center of the second sub-pixel and the centers of the two third sub-pixels is substantially equal, and the distance between the center of the second sub-pixel and the centers of the two first sub-pixels is substantially equal; or In at least one of the virtual quadrilaterals, the distance between the center of the second sub-pixel and the centers of the two third sub-pixels is substantially equal, and the distance between the center of the second sub-pixel and the centers of the two first sub-pixels is unequal.

11. The display substrate according to claim 10, characterized in that: In at least one of the virtual quadrilaterals, the distance between the second sub-pixel and the first of the third sub-pixels is L1, the distance between the second sub-pixel and the center of the second of the third sub-pixels is L2, and the distances between the second sub-pixel and the two first sub-pixels are both L1; or In at least one of the virtual quadrilaterals, a distance between the second sub-pixel and two of the third sub-pixels, and a distance between two of the first sub-pixels are both L1; or In at least one of the virtual quadrilaterals, a distance between the second sub-pixel and two of the third sub-pixels, and a distance between two of the first sub-pixels are both L2; or In at least one of the virtual quadrilaterals, the distances between the second sub-pixel and the two third sub-pixels are both L1, the distance between the second sub-pixel and the first of the first sub-pixels is L1, and the distance between the second sub-pixel and the second of the first sub-pixels is L2; or In at least one of the virtual quadrilaterals, the distance between the second sub-pixel and the two third sub-pixels is L2, and the distance between the second sub-pixel and the two first sub-pixels is L1; Among them, L2 is greater than L1.

12. The display substrate according to claim 11, characterized in that: The difference between L2 and L1 is greater than or equal to 1 μm, and the range of L1 is 12 to 30 μm.

13. The display substrate according to claim 1, characterized in that: All interior angles of the virtual quadrilateral range from 70° to 120°.

14. The display substrate according to claim 1, characterized in that: Some of the virtual quadrilaterals are first parallelograms, and some of the virtual quadrilaterals are second parallelograms. In the row direction and the column direction, the first parallelograms and the second parallelograms are arranged alternately, and at least one internal angle of the first parallelogram and the second parallelogram is different.

15. The display substrate according to claim 14, characterized in that: The acute angles of the first parallelogram and the second parallelogram are in the range of greater than or equal to 70° and less than 90°.

16. The display substrate according to claim 1, characterized in that: A difference between the width of the third sub-pixel and / or the first sub-pixel in the first oblique direction and the second oblique direction is greater than or equal to 1 μm.

17. The display substrate according to claim 1, characterized in that: The second sub-pixel has different widths in the first oblique direction and the second oblique direction.

18. The display substrate according to claim 17, characterized in that: Within the virtual quadrilateral, the second sub-pixel is roughly symmetrical with respect to a center line connecting two adjacent third sub-pixels arranged in the first oblique direction or the second oblique direction, and is roughly symmetrical with respect to a center line connecting two adjacent first sub-pixels arranged in the second oblique direction or the first oblique direction.

19. The display substrate according to any one of claims 1 to 18, wherein: The four virtual quadrilaterals arranged in an array form a virtual polygon, and the first sub-pixel and the third sub-pixel are located at the vertex or edge of the virtual polygon and are alternately distributed on the edge or vertex position of the virtual polygon in a clockwise direction.

20. The display substrate according to claim 19, wherein: In the virtual polygon, centers of the third sub-pixels in the same row are substantially on a straight line parallel to the row direction, and / or centers of the third sub-pixels in the same column are substantially on a straight line parallel to the column direction.

21. The display substrate according to claim 19, wherein: In the virtual polygon, centers of the second sub-pixels in the same row are substantially on a straight line parallel to the row direction, and / or centers of the second sub-pixels in the same column are substantially on a straight line parallel to the column direction.

22. The display substrate according to claim 1, characterized in that: The total opening areas of the third sub-pixel, the second sub-pixel and the first sub-pixel decrease successively, the total opening area of ​​the first sub-pixel is x, the total opening area of ​​the second sub-pixel is a*x, and the total opening area of ​​the third sub-pixel is b*x, wherein 0.5≤a≤0.8, 1≤b≤2.

2.

23. The display substrate according to claim 1, characterized in that: The shapes of the first sub-pixel, the second sub-pixel and the third sub-pixel are selected from any one of a polygon, a circle and an ellipse.

24. The display substrate according to claim 23, characterized in that: The shapes of the first sub-pixel, the second sub-pixel and the third sub-pixel are selected from any one of a quadrilateral, a hexagon, an octagon, a quadrilateral with rounded corners, a hexagon with rounded corners or an octagon with rounded corners, a circle and an ellipse.

25. The display substrate according to claim 1, characterized in that: The first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.

26. A display device, characterized in that: Comprising the display substrate as described in any one of claims 1-25.

27. The display device according to claim 26, characterized in that: It also includes a pixel defining layer, which includes a plurality of pixel defining layer openings, each of the first sub-pixels, each of the second sub-pixels, and each of the third sub-pixels corresponds to a pixel defining layer opening, and the shapes of the first sub-pixels, the second sub-pixels, and the third sub-pixels are substantially the same as the opening shapes of the corresponding pixel defining layers.

28. The display device according to claim 27, characterized in that The first sub-pixel includes a multi-layer film layer, and the multi-layer film layer of the first sub-pixel at least partially covers the area outside the opening of the pixel definition layer; and / or the second sub-pixel includes a multi-layer film layer, and the multi-layer film layer of the second sub-pixel at least partially covers the area outside the opening of the pixel definition layer; And / or, the third sub-pixel includes a multi-layer film layer, and the multi-layer film layer of the third sub-pixel at least partially covers the area outside the opening of the pixel defining layer.

29. The display device according to claim 27, characterized in that The pixel definition layer openings have at least partially different shapes or areas.

30. The display device according to claim 27, characterized in that The pixel defining layer opening corresponding to the first sub-pixel or the third sub-pixel has at least a partial shape or area different from that of the first sub-pixel or the third sub-pixel.

31. The display device according to claim 27, characterized in that: The shortest distances between at least a portion of the pixel defining layer opening corresponding to the first sub-pixel or the third sub-pixel and the adjacent opening are not equal.

32. A high-precision metal mask, used for manufacturing the display substrate according to any one of claims 1 to 25, wherein the first sub-pixel comprises a multi-layer film layer, the second sub-pixel comprises a multi-layer film layer, the third sub-pixel comprises a multi-layer film layer, and the mask comprises: A plurality of opening regions, the plurality of opening regions comprising a first opening region corresponding to the shape and distribution of at least one film layer in the first sub-pixel, or a second opening region corresponding to the shape and distribution of at least one film layer in the second sub-pixel, or a third opening region corresponding to the shape and distribution of at least one film layer in the third sub-pixel.

Images