WO2021083048A1

WO2021083048A1 - Display backplane, mask plate component, and display apparatus

Info

Publication number: WO2021083048A1
Application number: PCT/CN2020/123268
Authority: WO
Inventors: 徐鹏; 丁渭渭; 邓江涛
Original assignee: 京东方科技集团股份有限公司; 成都京东方光电科技有限公司
Priority date: 2019-10-31
Filing date: 2020-10-23
Publication date: 2021-05-06
Also published as: CN112750863A

Abstract

Provided are a display backplane and a mask plate component. The display backplane comprises: a substrate; a plurality of first sub-pixels and a plurality of second sub-pixels that are arranged on the substrate, wherein in a first sub-pixel and a second sub-pixel that are adjacent to each other, a first light-emitting layer in the first sub-pixel and a second light-emitting layer in the second sub-pixel are provided with top angles that are arranged opposite one another in a first direction; and a pixel defining layer provided with a plurality of openings configured to define light-emitting regions of the plurality of first sub-pixels and the plurality of second sub-pixels, wherein in the first direction, a first top angle of the first light-emitting layer and a second top angle of the second light-emitting layer are arranged opposite one another, and a part, extending to be intersected towards the top of at least one top angle among the first top angle and the second top angle, of two sides of the top angle forms an arc segment or a straight-line segment, such that the top angle becomes a round chamfer or a flat chamfer.

Description

Display backplane, mask assembly and display device

Technical field

This application relates to the field of display technology, in particular, to a display backplane, a mask assembly and a display device.

Background technique

OLED display devices are widely used due to their bright colors, low energy consumption, fast response speed, etc. The light-emitting layer is usually formed in the opening of the pixel definition layer (PDL) by evaporation method, and each light-emitting layer needs to be combined with one The pixel defining layer corresponds to the opening, so it is necessary to use a mask (such as a high-precision metal mask (FMM)) to form the light-emitting layer at the corresponding opening position, that is, the mask has an FMM opening corresponding to the PDL opening. At this time, the light-emitting layer material is deposited in the PDL opening through the FMM opening. However, in related technologies, the pixel area is not fully utilized, and the risk of product color mixing or lack of color is high.

Therefore, the current OLED display device related technologies still need to be improved.

Summary of the invention

This application aims to solve one of the technical problems in the related technology at least to a certain extent. To this end, an objective of the present application is to provide a display backplane that can improve color mixing, lack of color, or increase the aperture ratio.

In the first aspect of the present application, the present application provides a display backplane. According to an embodiment of the present application, the display backplane includes: a substrate; a plurality of first sub-pixels and a plurality of second sub-pixels arranged alternately along a first direction on the substrate, the first sub-pixels including the first sub-pixels A light-emitting layer, the second sub-pixel includes a second light-emitting layer, the first light-emitting layer and the second light-emitting layer are both polygonal, and the first light-emitting layer and the first light-emitting layer adjacent in the first direction The second light-emitting layer has a relatively set top corner in the first direction; the pixel defining layer has a plurality of openings configured to define light-emitting regions of a plurality of first sub-pixels and a plurality of second sub-pixels; wherein, adjacent In the opposite vertex angles of the first light-emitting layer and the second light-emitting layer, the vertex angle of the first light-emitting layer opposite to the vertex angle of the second light-emitting layer is the first vertex angle, and The apex angle of the second light-emitting layer opposite to the apex angle of the first light-emitting layer is a second apex angle, and two sides of at least one of the first apex angle and the second apex angle face each other The part where the vertices extend and meet is formed as an arc segment or a straight line segment so that the vertex corner becomes a round or flat chamfer; the orthographic projection of the light-emitting area of the first sub-pixel on the substrate falls into the In the orthographic projection of the first light-emitting layer on the substrate, the orthographic projection of the light-emitting area of the second sub-pixel on the substrate falls within the orthographic projection of the second light-emitting layer on the substrate , And in the first direction, the orthographic projection of the round chamfer or the flat chamfered arc or straight line on the substrate is located between the light-emitting area of the first sub-pixel and the second sub-pixel The light-emitting area of is between the orthographic projection of the substrate, and does not overlap with the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel on the orthographic projection of the substrate.

According to an embodiment of the present application, there is a gap between the first apex angle and the second apex angle.

According to an embodiment of the present application, the line connecting the two ends of the arc segment or the straight segment extends in a second direction, and the second direction is perpendicular to the first direction.

According to an embodiment of the present application, the point at which the extension lines of the two sides of the round chamfer or the flat chamfer intersect in the direction of the vertex are the virtual vertex of the vertex; the virtual vertex of the first vertex and the vertex The virtual vertex of the second vertex is located on a straight line parallel to the first direction.

According to an embodiment of the present application, the orthographic projection of the virtual vertex of the first vertex on the substrate is within the orthographic projection of the second light-emitting layer on the substrate, and the virtual vertex of the second vertex is on the substrate. The orthographic projection on the substrate is located within the orthographic projection of the first light-emitting layer on the substrate.

According to an embodiment of the present application, the shape of the first light-emitting layer and the second light-emitting layer is quadrilateral, hexagonal or octagonal, and the opposite tops of the first light-emitting layer and the second light-emitting layer The angle at the virtual vertex of the angle is 45 degrees-135 degrees.

According to an embodiment of the present application, the first apex angle and the second apex angle both have the arc line segment, and the arc line segment of the first apex angle and the arc line segment of the second apex angle It is symmetrical with respect to a straight line perpendicular to the first direction; or, the first apex angle and the second apex angle both have the straight line section, and the straight line section of the first apex angle and the straight line of the second apex angle The segments are symmetrical with respect to a line perpendicular to the first direction.

According to an embodiment of the present application, a plurality of the first sub-pixels and a plurality of the second sub-pixels are alternately arranged in both the first direction and the second direction, and the first sub-pixels that are adjacent in the first direction are arranged alternately. A light-emitting layer and the second light-emitting layer have the oppositely arranged apex angles in the first direction, and the first light-emitting layer and the second light-emitting layer that are adjacent in the second direction are in the The second direction has opposite apex angles; wherein, in the first direction and the second direction, in the opposite apex angles of the adjacent first light-emitting layer and the second light-emitting layer, the The vertex angle of the first light emitting layer opposite to the vertex angle of the second light emitting layer is the third vertex angle, and the vertex angle of the second light emitting layer opposite to the vertex angle of the first light emitting layer is the fourth vertex angle. Angle, at least one of the third apex angle and the fourth apex angle at the opposing apex angle of the first light-emitting layer and/or the second light-emitting layer is defined by the apex angle The part where the two sides extend and meet the vertex of the vertex is formed as an arc segment or a straight segment so that the vertex is rounded or chamfered; and in the first direction and the second direction In the above, the orthographic projection of the round or chamfered arc or straight line segment on the substrate is located in the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel is in the There is no overlap between the orthographic projection of the substrate and the orthographic projection of the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel on the substrate.

According to an embodiment of the present application, there is a gap between the third apex angle and the fourth apex angle.

According to an embodiment of the present application, the display backplane further includes a plurality of third sub-pixels, and the third sub-pixels are formed into two first sub-pixels and two second sub-pixels in a 2*2 matrix. Surrounded by pixels; the third sub-pixel includes a third light-emitting layer, and the opening of the pixel defining layer is configured to define the light-emitting area of the third sub-pixel.

According to an embodiment of the present application, the centers of the light-emitting regions of the two first sub-pixels and the two second sub-pixels forming the 2*2 matrix are respectively located at four vertices of a virtual rectangle, and the The light-emitting area of the third sub-pixel surrounded by the two first sub-pixels and the two second sub-pixels is located at the center of the virtual rectangle.

According to the embodiment of the present application, the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer are all rectangular with rounded corners, or the first light-emitting layer and the second light-emitting layer are both Each of the four corners is rectangular, and the third light-emitting layer is rectangular with rounded corners.

According to an embodiment of the present application, for the two first sub-pixels and two second sub-pixels forming a 2*2 matrix and the third sub-pixel surrounded therein, the first light-emitting layer and the second light-emitting layer The layers have gaps at their respective vertex corners and the boundary of the third light-emitting layer, and the first light-emitting layer and the second light-emitting layer are connected to the third light-emitting layer at a non-apex corner of one side. The boundaries of the light-emitting layers meet.

According to an embodiment of the present application, the first sub-pixel is a red sub-pixel, the second sub-pixel is a blue sub-pixel, and the third sub-pixel is a green sub-pixel.

According to an embodiment of the present application, the first light-emitting layer and the second light-emitting layer are both square with rounded corners, and the area of the second light-emitting layer is larger than the area of the first light-emitting layer, and the third light-emitting layer has rounded corners. Rectangle, and the long side of the rounded rectangle is the side close to the second light-emitting layer, and the short side of the rounded rectangle is the side close to the first light-emitting layer.

In the second aspect of the present application, the present application provides a display backplane. According to an embodiment of the present application, the display backplane includes: a substrate; a plurality of first sub-pixels and a plurality of second sub-pixels arranged alternately along a first direction on the substrate, the first sub-pixels including the first sub-pixels A light-emitting layer, the second sub-pixel includes a second light-emitting layer, and the first light-emitting layer and the second light-emitting layer adjacent in the first direction have opposite apex angles in the first direction , The apex angle of the first light-emitting layer opposite to the apex angle of the second light-emitting layer is the first apex angle, and the apex angle of the second light-emitting layer opposite to the apex angle of the first light-emitting layer is At a second vertex angle, the first light-emitting layer includes a first light-emitting layer body and a first compensating portion protruding at the first vertex, and the first compensating portion and the first light-emitting layer body are at the first vertex angle The second light-emitting layer includes a second light-emitting layer body and a second compensating portion protruding at a second vertex, and the second compensating portion and the second light-emitting layer body are at the second vertex angle. The first compensation part and the second compensation part are partially overlapped; the pixel defining layer has a plurality of openings configured to define a plurality of the first sub-pixels and a plurality of the second sub-pixels. Light-emitting area; wherein the orthographic projection of the light-emitting area of the first sub-pixel on the substrate falls within the orthographic projection of the first light-emitting layer on the substrate, and the light-emitting area of the second sub-pixel is The orthographic projection on the substrate falls within the orthographic projection of the second light-emitting layer on the substrate, and in the first direction, the first compensation portion and the second compensation portion are in the The orthographic projection of the substrate is located between the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel between the orthographic projection of the substrate, and is in contrast to the light-emitting area of the first sub-pixel and the second sub-pixel. The light-emitting areas of the sub-pixels do not overlap in the orthographic projection of the substrate.

According to an embodiment of the present application, the first compensation portion includes two adjacent sides of the first light-emitting layer main body, and the parts close to the first vertex angle respectively expand in a direction away from the first light-emitting layer main body. A first protruding structure formed by converging toward the first vertex, and the second compensation portion includes two adjacent sides of the second light-emitting layer main body that are close to the second vertex and are respectively directed away from the first vertex. A second protruding structure formed by expanding the directions of the main bodies of the two light-emitting layers and meeting at the second vertex; the contour of the first protruding structure connecting the two adjacent sides of the first light-emitting layer is an arc The segment is either a polyline segment; the contour of the second protruding structure connecting the two adjacent sides of the second light-emitting layer is an arc segment or a polyline segment.

According to an embodiment of the present application, the point where the extension lines of the two adjacent sides of the first light-emitting layer body intersect is a first virtual vertex, and the extension line of the two adjacent sides of the second light-emitting layer body The intersecting point is a second virtual vertex, the first virtual vertex is located in the first compensation portion, and the second virtual vertex is located in the second compensation portion.

According to an embodiment of the present application, in the extension direction of any one of the two adjacent sides of the first light-emitting layer main body, the length of the part of the side that extends away from the first light-emitting layer main body occupies 1/5 to 1/3 of the total size of the first light-emitting layer in the extending direction of the side.

According to an embodiment of the present application, the polyline segment includes a plurality of linear segments connected in sequence, wherein the point where the two linear segments connected to the main body of the light-emitting layer intersect an extension line in a direction approaching each other in the polyline segment is a virtual The intersection point, the line between the two end points of the polyline segment connected to the main body of the light-emitting layer and the virtual intersection point and the polyline segment together form a virtual polygon.

According to the embodiment of the present application, the contours of the first protruding structure and the second protruding structure are both arc segments, and the radius of curvature of the arc segment formed by the contours of the first protruding structure is said 1/5 to 1/3 of the side length of the first light-emitting layer, and the radius of curvature of the arc segment formed by the contour of the second convex structure is 1/5 to 1/ of the side length of the second light-emitting layer 3; Or, the contours of the first protruding structure and the second protruding structure are both broken line segments, and the side length of the virtual polygon formed by the broken line segment formed by the contours of the first protruding structure is the first 1/5 to 1/3 of the side length of a light-emitting layer, and the side length of a virtual polygon formed by the polygonal segment formed by the contour of the second convex structure is 1/5 to 1/3 of the side length of the second light-emitting layer 1/3.

According to the embodiment of the present application, the contour of the first convex structure and the contour of the second convex structure are both arc segments, and the arc segment formed by the contour of the first convex structure and the The arc segment formed by the contour of the second protruding structure is symmetrical with respect to a straight line perpendicular to the first direction; or, the contour of the first protruding structure and the contour of the second protruding structure are both broken line segments, and The fold line segment formed by the contour of the first convex structure and the fold line segment formed by the contour of the second convex structure are symmetrical with respect to a straight line perpendicular to the first direction.

According to an embodiment of the present application, the virtual vertex of the first vertex and the virtual vertex of the second vertex are located on a straight line parallel to the first direction.

According to an embodiment of the present application, the orthographic projection of the virtual vertex of the first vertex angle on the substrate is within the orthographic projection of the second light-emitting layer on the substrate, and the virtual vertex of the second vertex angle is The orthographic projection on the substrate is located within the orthographic projection of the first light-emitting layer on the substrate.

According to an embodiment of the present application, the shape of the first light-emitting layer and the second light-emitting layer is a quadrilateral, a hexagon, or an octagon with a convex apex structure, and the virtual apex of the first apex angle is The angle and the angle derived from the virtual apex angle of the second apex angle are respectively 45 degrees to 135 degrees.

According to an embodiment of the present application, a plurality of the first sub-pixels and a plurality of the second sub-pixels are alternately arranged in a second direction perpendicular to the first direction, and the adjacent ones in the second direction The first light-emitting layer and the second light-emitting layer have opposite apex angles in the second direction; wherein, in the second direction, the first light-emitting layer and the second light-emitting layer The vertex angle opposite to the vertex angle is the third vertex angle, the vertex angle of the second light-emitting layer opposite to the vertex angle of the first light-emitting layer is the fourth vertex angle, and the first light-emitting layer includes the third vertex angle. A third compensating part protruding at the top corner, the third compensating part and the first light-emitting layer body are connected as a whole at the third top corner, and the second light-emitting layer includes a convex part at the fourth top corner. The fourth compensation portion is connected to the second light-emitting layer body at the fourth vertex angle, and the third compensation portion and the fourth compensation portion partially overlap; and In the second direction, the orthographic projection of the third compensation portion and the fourth compensation portion on the substrate is located in the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel is located in the There is no overlap between the orthographic projection of the substrate and the orthographic projection of the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel on the substrate.

According to the embodiment of the present application, it further includes a plurality of third sub-pixels, the third sub-pixels are surrounded by two first sub-pixels and two second sub-pixels formed in a 2*2 matrix; the third sub-pixels The pixel includes a third light-emitting layer, and the opening of the pixel defining layer is configured to define the light-emitting area of the third sub-pixel.

According to an embodiment of the present application, the centers of the light-emitting areas of the two first sub-pixels and the two second sub-pixels forming a 2*2 matrix are respectively located at the four vertices of a virtual rectangle, and the two first sub-pixels are formed by the two first sub-pixels and the two second sub-pixels. The light-emitting area of the third sub-pixel surrounded by the sub-pixel and the two second sub-pixels is located at the center of the virtual rectangle.

According to the embodiment of the present application, the contours of the convex structures at the top corners of the first light-emitting layer and the second light-emitting layer are all arc segments, and the third light-emitting layer is a rectangle with rounded corners, or The contours of the convex structures at the top corners of the first light-emitting layer and the second light-emitting layer are all broken line segments, and the third light-emitting layer is a rectangle with rounded corners.

According to the embodiment of the present application, the first light-emitting layer and the second light-emitting layer are both squares with protruding structures at four corners, and the contours of the protruding structures at the four corners are all circular arcs, and The area of the second light-emitting layer is larger than the area of the first light-emitting layer, the third light-emitting layer is a rectangle with rounded corners, and the long side of the rounded rectangle is the side close to the second light-emitting layer, so The short side of the rounded rectangle is the side close to the first light-emitting layer.

In the third aspect of the present application, the present application provides a display backplane. According to an embodiment of the present application, the display backplane includes: a substrate; a plurality of first sub-pixels and a plurality of second sub-pixels arranged alternately along a first direction on the substrate, the first sub-pixels including the first sub-pixels A light-emitting layer, the second sub-pixel includes a second light-emitting layer, the first light-emitting layer and the second light-emitting layer are both polygonal, and the first light-emitting layer and the first light-emitting layer adjacent in the first direction The second light-emitting layer has a relatively set top corner in the first direction; the pixel defining layer has a plurality of openings configured to define light-emitting regions of a plurality of first sub-pixels and a plurality of second sub-pixels; wherein, adjacent In the opposite vertex angles of the first light-emitting layer and the second light-emitting layer, the vertex angle of the first light-emitting layer opposite to the vertex angle of the second light-emitting layer is the first vertex angle, and The apex angle of the second light-emitting layer opposite to the apex angle of the first light-emitting layer is a second apex angle, and two sides of at least one of the first apex angle and the second apex angle face each other The part where the apex extends and meets is formed as a straight line segment so that the apex angle becomes flat and chamfered, and the straight line segment of the first apex angle and the straight line segment of the second apex angle at least partially overlap; the first sub-pixel The orthographic projection of the light-emitting area on the substrate falls within the orthographic projection of the first light-emitting layer on the substrate, and the orthographic projection of the light-emitting area of the second sub-pixel on the substrate falls within the orthographic projection of the first light-emitting layer on the substrate. In the orthographic projection of the second light-emitting layer on the substrate, and in the first direction, the straight line segment of the flat chamfer is located in the orthographic projection of the substrate on the light-emitting area of the first sub-pixel and in the first direction. The light-emitting area of the second sub-pixel is between the orthographic projection of the substrate, and does not overlap with the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel on the orthographic projection of the substrate. .

According to an embodiment of the present application, a plurality of the first sub-pixels and a plurality of the second sub-pixels are alternately arranged in a second direction perpendicular to the first direction, and all adjacent ones in the second direction are arranged alternately. The first light-emitting layer and the second light-emitting layer have opposite apex angles in the second direction; wherein, in the second direction, the adjacent first light-emitting layer and the second light-emitting layer Among the opposite vertex angles of the light-emitting layer, the vertex angle of the first light-emitting layer opposite to the vertex angle of the second light-emitting layer is the third vertex angle, and the vertex angle of the second light-emitting layer and the first light-emitting layer are The vertex angle opposite to the vertex angle is the fourth vertex angle, and the part where the two sides of at least one vertex angle of the third vertex angle and the fourth vertex angle extend and meet the vertex of the vertex angle is formed as a straight line Line segments such that the apex angle becomes a flat chamfer, and the straight line segment of the third apex angle and the straight line segment of the fourth apex angle at least partially overlap; and in the second direction, the flat chamfer The straight line segment of the substrate is located between the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel in the orthographic projection of the substrate, and is in line with the light-emitting area of the first sub-pixel. The area and the light-emitting area of the second sub-pixel do not overlap in the orthographic projection of the substrate.

In the fourth aspect of the present application, the present application provides a mask assembly for preparing the light-emitting layer in the aforementioned display backplane. According to an embodiment of the present application, the mask assembly includes: a first mask, the first mask having a plurality of first openings for forming a first light-emitting layer; a second mask, the The second mask has a plurality of second openings for forming the second light-emitting layer.

According to an embodiment of the present application, the mask assembly further includes: a third mask, the third mask having a plurality of third openings for forming the third light-emitting layer.

Description of the drawings

FIG. 1 is a schematic diagram of a partial plane structure of a display backplane according to an embodiment of the present application.

FIG. 2 is a schematic partial plan view of a display backplane according to another embodiment of the present application.

Fig. 3 is a schematic sectional view of the structure along the line a-a in Fig. 1.

FIG. 4 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 5 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 6 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 7 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 8 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 9 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 10 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 11 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 12 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 13 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 14 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 15 is a schematic diagram of a partial plane structure of a display backplane according to another embodiment of the present application.

FIG. 16 is a schematic diagram of a partial plane structure of a first mask plate according to an embodiment of the present application.

FIG. 17 is a schematic diagram of a partial plane structure of a second mask of an embodiment of the present application.

FIG. 18 is a schematic diagram of a partial plane structure when the first mask and the second mask are stacked and aligned in an embodiment of the present application.

FIG. 19 is a schematic diagram of a partial plane structure of a third mask according to an embodiment of the present application.

FIG. 20 is a schematic diagram of a partial plane structure when the first mask, the second mask, and the third mask are stacked and aligned in an embodiment of the present application.

Detailed ways

The embodiments of the present application are described in detail below. The embodiments described below are exemplary, and are only used to explain the present application, and cannot be understood as a limitation to the present application. Where specific techniques or conditions are not indicated in the examples, the procedures shall be carried out in accordance with the techniques or conditions described in the literature in the field or in accordance with the product specification.

In the first aspect of the present application, the present application provides a display backplane. According to an embodiment of the present application, referring to FIGS. 1, 2 and 3, the display backplane includes: a substrate 100; a plurality of first sub-pixels and a plurality of second sub-pixels arranged alternately along the first direction on the substrate. Sub-pixel, the first sub-pixel includes a first light-emitting layer 10, the second sub-pixel includes a second light-emitting layer 20, the first light-emitting layer 10 and the second light-emitting layer 20 are both polygonal, and The first light-emitting layer 10 and the second light-emitting layer 20 adjacent in the first direction have oppositely arranged apex angles in the first direction; the pixel defining layer 200 has a plurality of openings 210 configured to define a plurality of The light-emitting area 12 of the first sub-pixel and the light-emitting area 22 of the plurality of second sub-pixels; wherein, the first light-emitting layer 10 and the second light-emitting layer 20 are adjacent to each other in the opposing corners. The vertex angle of a light emitting layer 10 opposite to the vertex angle of the second light emitting layer 20 is the first vertex angle 14, and the vertex angle of the second light emitting layer 20 opposite to the vertex angle of the first light emitting layer 10 Is the second apex angle 24, and the part where the two sides of at least one of the first apex angle 14 and the second apex angle 24 extend to its apex and meet is formed as an arc line segment 110 or a straight line segment 120 In order to make the apex angle a round or flat chamfer (in addition, it is understandable that there may be a gap 1 between the first apex angle 14 and the second apex angle 24, as shown in FIG. 1 What is shown is the case where there is a gap 1 between the first apex angle 14 and the second apex angle 24; of course, those skilled in the art can also understand that there is also a gap between the first apex angle and the second apex angle. There may be no gaps, which will not be repeated hereafter); the orthographic projection of the light-emitting area 12 of the first sub-pixel on the substrate 100 falls into the area of the first light-emitting layer 10 on the substrate 100 In the orthographic projection, the orthographic projection of the light-emitting area 22 of the second sub-pixel on the substrate 100 falls within the orthographic projection of the second light-emitting layer 20 on the substrate 100, and is in the first direction. , The orthographic projection of the round or chamfered arc segment 110 or the straight line segment 120 on the substrate 100 is located in the light-emitting area 12 of the first sub-pixel and the light-emitting area of the second sub-pixel 22 is between the orthographic projections of the substrate 100 and does not overlap with the orthographic projections of the light-emitting area 12 of the first sub-pixel and the light-emitting area 22 of the second sub-pixel on the substrate 100. In the display backplane, the first apex corner and the second apex corner are rounded or flat chamfered, and there is a gap between the apex corners of the adjacent first light-emitting layer and the second light-emitting layer, or the adjacent second light-emitting layer There is no gap between the top corners of the first light-emitting layer and the second light-emitting layer, which can effectively improve the risk of color mixing at the top corners of the light-emitting layer, and is easy to prepare.

It can be understood that the substrate in the display backplane is not particularly limited, and can be a glass substrate, a polymer substrate, etc. The specific thickness, shape, and size can be selected according to actual usage requirements, and will not be repeated here.

It should be noted that the first light-emitting layer and the second light-emitting layer herein may be organic layers, which may include an electron injection layer, an electron transport layer, an organic light-emitting layer, a hole transport layer, a hole injection layer, etc., which are stacked. , Where the electron injection layer, electron transport layer, hole transport layer, and hole injection layer can be an entire layer structure formed by an open mask. Take the electron injection layer as an example, that is, multiple first light-emitting layers and multiple second light-emitting layers The electron injection layers in the layers are connected to each other to form a continuous whole layer structure, while the organic light-emitting layer is a patterned layer structure corresponding to each sub-pixel, that is, a film layer formed by FMM. In addition, the "round chamfer" in this article refers to the angle formed by the corner rounding of the polygon, and the "flat chamfering" refers to the angle formed by replacing the arc segment of the round and chamfering with a straight line segment.

It can be understood that the larger the gap 1 between the adjacent first light-emitting layer 10 and the second light-emitting layer 20, the lower the risk of color mixing, but the smaller the proportion of the light-emitting area of the display backplane is, which is not conducive to achieving high PPI (pixel density) and display quality, in order to balance the above two factors, the size of the gap 1 can be greater than 0 and less than or equal to 0.41X, where X is the distance between two adjacent openings in the pixel defining layer. Within this size range, the risk of color mixing can be effectively reduced, and at the same time, the proportion of the light-emitting area can be ensured as much as possible, and the display quality can be improved.

In the display backplane according to the embodiments of the present application, while ensuring that the risk of color mixing is avoided, the area of the display backplane can be further utilized by rationally arranging different sub-pixels, so that the area of the light-emitting area accounts for a larger proportion. Higher PPI and better display effect.

According to some embodiments of the present application, the connecting line 112 (refer to FIG. 1) between the two ends of the arc segment 110 (refer to FIG. 2) or the straight line segment 120 (refer to FIG. 2) may extend in a second direction. The first direction is vertical.

According to other embodiments of the present application, the point where the extension lines of the two sides of the round chamfer or the flat chamfer in the direction of the vertex intersect are the virtual vertex of the vertex; referring to FIG. 1 and FIG. 2, the The virtual vertex 141 of the first vertex 14 and the virtual vertex 241 of the second vertex 24 are located on a straight line aa or ee parallel to the first direction.

According to some embodiments of the present application, referring to FIG. 4, the virtual vertex 141 of the first vertex 14 and the virtual vertex 241 of the second vertex 24 are staggered in the first direction, that is, the virtual vertex 141 of the first vertex 14 is located in the first direction. The virtual vertex 241 of the two vertex corners 24 is far away from the first sub-pixel, and the virtual vertex 241 of the second vertex corner 24 is located on the side of the virtual vertex 141 of the first vertex corner 14 away from the second sub-pixel. According to other embodiments of the present application, referring to FIG. 5, the orthographic projection of the virtual vertex 141 of the first vertex 14 on the substrate is located within the orthographic projection of the second light-emitting layer 20 on the substrate. The orthographic projection of the virtual vertex 241 of the two vertex corners 24 on the substrate is located within the orthographic projection of the first light-emitting layer 10 on the substrate. Therefore, in the first direction, the gap 1 between the adjacent first light-emitting layer and the second light-emitting layer is smaller, and the area of the light-emitting region occupies a larger proportion, which can achieve higher pixel density and better display effect. it is good.

According to the embodiment of the present application, the shape of the first light-emitting layer and the second light-emitting layer may be quadrangular, hexagonal, or octagonal. The angle α1 and the angle α2 at the virtual vertex of the second vertex angle of the second light-emitting layer may be 45 degrees to 135 degrees independently, and specifically may be 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees, etc. .

According to an embodiment of the present application, referring to FIG. 1, the first apex angle 14 and the second apex angle 24 both have the arc segment 110, and the arc segment of the first apex angle is the same as the first apex angle. The arc segments of the two vertex angles are symmetrical with respect to the straight line cc perpendicular to the first direction; or, referring to FIG. 2, both the first vertex angle 14 and the second vertex angle 24 have the straight line segment 120, and the first vertex angle The straight line segment of a vertex angle and the straight line segment of the second vertex angle are symmetrical with respect to a straight line dd perpendicular to the first direction.

According to an embodiment of the present application, referring to FIGS. 1 and 2, a plurality of the first sub-pixels and a plurality of the second sub-pixels are alternately arranged in the second direction, and all adjacent ones in the second direction are arranged alternately. The first light-emitting layer 10 and the second light-emitting layer 20 have opposite apex angles in the second direction; wherein, in the second direction, the adjacent first light-emitting layer 10 and the second light-emitting layer Among the opposite apex angles of the layer 20, the apex angle of the first light-emitting layer 10 opposite to the apex angle of the second light-emitting layer 20 is the third apex angle 16, and the second light-emitting layer 20 and the The vertex angle opposite to the vertex angle of the first light-emitting layer 10 is a fourth vertex angle 26, and two sides of at least one vertex angle of the third vertex angle 16 and the fourth vertex angle 26 face the vertex angle. The part where the apex extends and meets is formed as an arc 130 or a straight line 140 so that the apex angle becomes a round chamfer or a flat chamfer (in addition, it can be understood that the aforementioned third apex angle 16 and the There may be a gap 2 between the fourth apex angle 26, and FIG. 1 and FIG. 2 show the case where there is a gap 2 between the third apex angle 16 and the fourth apex angle 26; of course, the technology in the art Personnel can also understand that there may be no gap between the third vertex and the fourth vertex, which will not be repeated hereafter); and in the second direction, the rounded corner or the flattened The angular arc line segment 130 or the straight line segment 140 on the substrate in the orthographic projection is located between the light-emitting area 12 of the first sub-pixel and the light-emitting area 22 of the second sub-pixel in the orthographic projection of the substrate, and There is no overlap with the orthographic projection of the light-emitting area 12 of the first sub-pixel and the light-emitting area 22 of the second sub-pixel on the substrate. Therefore, in the second direction, the risk of color mixing between the first light-emitting layer and the second light-emitting layer can be well avoided.

According to the embodiment of the present application, the third apex angle and the fourth apex angle may also be set in the above-mentioned manner of the first apex angle and the second apex angle. Specifically, in some embodiments, the two end points of the arc segment 130 The connecting line 132 (refer to FIG. 1) or the straight section 140 (refer to FIG. 2) may extend in the first direction.

In other embodiments, the point at which the round chamfer or the two sides of the flat chamfer at the third vertex and the fourth vertex intersect the extension lines of the vertex direction thereof is the virtual vertex of the vertex; 1 and 2, the virtual vertex 161 of the third vertex 16 and the virtual vertex 261 of the fourth vertex 26 are located on a straight line bb or ff parallel to the second direction.

According to some embodiments of the present application, referring to FIG. 4, the virtual vertex 161 of the third vertex 16 and the virtual vertex 261 of the fourth vertex 26 are interlaced in the third direction, that is, the virtual vertex 161 of the third vertex 16 is located on the fourth vertex. The virtual vertex 261 of the vertex 26 is far away from the first sub-pixel, and the virtual vertex 261 of the fourth vertex 26 is located on the virtual vertex 161 of the third vertex 16 away from the second sub-pixel. According to other embodiments of the present application, referring to FIG. 5, the orthographic projection of the virtual vertex 161 of the third vertex 16 on the substrate is located within the orthographic projection of the second light-emitting layer 20 on the substrate. The orthographic projection of the virtual vertices 261 of the four vertex corners 26 on the substrate is within the orthographic projection of the first light-emitting layer 10 on the substrate. Therefore, in the second direction, the gap between the adjacent first light-emitting layer and the second light-emitting layer is smaller, the area of the light-emitting region occupies a larger proportion, and the display effect is better.

According to the embodiment of the present application, referring to FIG. 1, the third vertex 16 and the fourth vertex 26 both have the arc segment 130, and the arc segment of the third vertex and the first The arc segments of the four vertices are symmetrical with respect to the straight line gg perpendicular to the second direction; or, referring to FIG. 2, the third vertices 16 and the fourth vertices 26 both have the straight segments 140, and the first The straight line segment of the three vertex angles and the straight line segment of the fourth vertex angle are symmetrical with respect to a straight line hh perpendicular to the second direction.

According to an embodiment of the present application, referring to FIG. 6, the display backplane further includes a plurality of third sub-pixels, and the third sub-pixels are formed as two first sub-pixels and two sub-pixels in a 2*2 matrix. Surrounded by the second sub-pixel; the third sub-pixel includes a third light-emitting layer 30, and the opening of the pixel defining layer is configured to define the light-emitting area 32 of the third sub-pixel.

According to an embodiment of the present application, the centers of the light-emitting regions of the two first sub-pixels and the two second sub-pixels forming a 2*2 matrix are respectively located at the four vertices of a virtual rectangle 40, and the two second sub-pixels The light-emitting area 32 of the third sub-pixel surrounded by one sub-pixel and two second sub-pixels is located at the center 42 of the virtual rectangle.

According to an embodiment of the present application, referring to FIG. 6, the first light-emitting layer 10, the second light-emitting layer 20, and the third light-emitting layer 30 are all rounded rectangles (the four corners of the rectangle are rounded). 7), or, referring to FIG. 7, the first light-emitting layer 10 and the second light-emitting layer 20 are both rectangular and the four corners of each are flat and chamfered, and the third light-emitting layer 30 is rounded. rectangle. It should be noted that, in order to ensure the processing yield and avoid alignment deviation (Margin), the light-emitting area is not formed with an organic light-emitting layer and cannot emit light. The light-emitting layer is generally expanded according to a certain ratio according to the corresponding light-emitting area. Therefore, the first The light-emitting area 12 of the sub-pixel, the light-emitting area 22 of the second sub-pixel, and the light-emitting area 32 of the third sub-pixel are similar in shape and contour to the first light-emitting layer 10, the second light-emitting layer 20, and the third light-emitting layer 30, respectively.

According to an embodiment of the present application, referring to FIG. 8, for the two first sub-pixels and two second sub-pixels forming a 2*2 matrix, and the third sub-pixels enclosed therein, the The first light-emitting layer 10 and the second light-emitting layer 20 have gaps at their respective top corners and the boundary of the third light-emitting layer 30, and the first light-emitting layer 10 and the second light-emitting layer The layer 20 is in contact with the boundary of the third light-emitting layer at a non-vertex corner of one side.

According to an embodiment of the present application, the first sub-pixel is a red sub-pixel, the second sub-pixel is a blue sub-pixel, and the third sub-pixel is a green sub-pixel. It should be noted that in actual use, the luminous efficiency or brightness of the blue organic light-emitting layer is lower than that of red light and green light, so that the area of the light-emitting layer and the area of the light-emitting region of the blue sub-pixel can be made larger than that of the red sub-pixel and the red sub-pixel. The areas of the light-emitting layer and the light-emitting region of the green sub-pixels are both large to achieve a better color display effect.

In some specific embodiments, referring to FIG. 6, the first light-emitting layer 10 and the second light-emitting layer 20 are both rounded squares, and the area of the second light-emitting layer 20 is larger than the area of the first light-emitting layer 10. The third light-emitting layer 30 is a rectangle with rounded corners, the long side 34 of the rounded rectangle is the side close to the second light-emitting layer 20, and the short side 36 of the rounded rectangle is close to the first side. One side of the light-emitting layer 10. Specifically, according to the arrangement of the first light-emitting layer and the second light-emitting layer, the long sides of the two adjacent third light-emitting layers are inclined in the opposite direction relative to the second direction, and relative to a straight line parallel to the second direction. ii Symmetrical. As a result, the area of the light-emitting area occupies a larger proportion, which can make full use of the area of the display backplane and improve the display quality.

In another aspect of the present application, the present application provides a display backplane. According to an embodiment of the present application, referring to FIGS. 9 and 10, the display backplane includes: a substrate 100; a plurality of first sub-pixels and a plurality of second sub-pixels arranged alternately along the first direction on the substrate 100 , The first sub-pixel includes a first light-emitting layer 10, the second sub-pixel includes a second light-emitting layer 20, and the first light-emitting layer 10 and the second light-emitting layer 20 are adjacent in the first direction. There are opposite apex angles in the first direction, the apex angle of the first light-emitting layer 10 opposite to the apex angle of the second light-emitting layer 20 is the first apex angle 14, and the second light-emitting layer The apex angle of 20 opposite to the apex angle of the first light-emitting layer 10 is the second apex angle 24, and the first light-emitting layer 10 includes the first light-emitting layer body 11 and the first apex angle 14 protruding from the first apex angle. Compensation part 13. The first compensation part 13 and the first light-emitting layer body 11 are connected as a whole at a first vertex, and the second light-emitting layer 20 includes a second light-emitting layer body 21 and a second vertex A protruding second compensating part 23, the second compensating part 23 and the second light-emitting layer body 21 are connected as one body at the second vertex, and the first compensating part 13 and the second compensating part 23 partly intersect Stacked; pixel defining layer 200, having a plurality of openings 210 configured to define a plurality of the first sub-pixel and a plurality of the second sub-pixel light-emitting area; wherein, the light-emitting area 12 of the first sub-pixel The orthographic projection on the substrate 100 falls within the orthographic projection of the first light-emitting layer 10 on the substrate 100, and the orthographic projection of the light-emitting area 22 of the second sub-pixel on the substrate 100 falls within the orthographic projection of the first light-emitting layer 10 on the substrate 100. The second light-emitting layer 20 is in the orthographic projection on the substrate 100, and in the first direction, the first compensation portion 13 and the second compensation portion 23 are located in the orthographic projection on the substrate 100 The light-emitting area 12 of the first sub-pixel and the light-emitting area 22 of the second sub-pixel are between the orthographic projection of the substrate 100, and are connected to the light-emitting area 12 of the first sub-pixel and the second sub-pixel. The light-emitting regions 22 of the pixels do not overlap in the orthographic projection of the substrate. In the display substrate, the adjacent first compensation portion 13 and the second compensation portion 23 are partially overlapped, so that the corresponding position can be etched by the chemical solution in the production of the mask for forming the light-emitting layer. Avoid the short straight line that causes the margin to become smaller due to the inability to be etched and formed, ensure the margin in the corresponding position, and reduce the risk of color lack.

It should be noted that when the light-emitting layer is formed by evaporation of a mask, in order to ensure that the opening of the mask is accurately aligned with the opening of the pixel defining layer (PDL), a certain alignment offset is usually reserved around the opening of the mask. The amount (ie Margin, the distance between the outline of the mask opening and the outline of the PDL opening), that is, the opening of the mask is slightly larger than the opening of the PDL, or the opening of the mask is enlarged in a certain proportion according to the opening of the PDL, Therefore, even if there is a certain error in the alignment, it can effectively ensure that the light-emitting layer is formed in the PDL opening to ensure that the light-emitting area normally emits light.

According to some specific embodiments of the present application, the overlapping area of the adjacent first compensation portion 13 and the second compensation portion 23 may be less than or equal to 0.0858X ² , and X is the PDL Gap. As a result, the Margin can be ensured as much as possible, the aperture ratio can be increased, and the risk of color mixing is low.

According to an embodiment of the present application, referring to FIG. 9 and FIG. 10, the first compensation portion 13 includes two adjacent sides of the first light-emitting layer main body 11, and the portions close to the first vertex 14 are respectively directed away from all sides. The direction of the first light-emitting layer main body 11 is expanded and the first protruding structure 15 is formed by converging toward the first vertex 14, and the second compensation portion 23 includes two adjacent sides of the second light-emitting layer main body 21 The portions close to the second vertex 24 respectively expand in a direction away from the second light-emitting layer main body 21 and converge to the second protruding structure 25 formed at the second vertex 24; connecting the first light-emitting layer 10 The contour 151 of the first protruding structure of the two adjacent sides is an arc segment or a broken line segment; the second protruding structure connecting the two adjacent sides of the second light-emitting layer 20 The contour 251 of is an arc segment or a polyline segment.

In some specific embodiments, the arc segment formed by the contour 151 of the first protruding structure and the contour 251 of the second protruding structure may be a circular arc, and the contour 151 of the first protruding structure and the contour 251 of the second protruding structure 251 The formed polyline segment may be a part of the contour of the polygon.

In some specific embodiments, referring to FIG. 9, the contour 151 of the first protruding structure and the contour 251 of the second protruding structure are arc segments. At this time, the contour of the first light-emitting layer body 11 is the same as the contour of the first protruding structure. 151 can be smoothly connected, and the contour of the second light-emitting layer main body 21 and the contour 251 of the second protruding structure can be smoothly connected. In other specific embodiments, referring to FIG. 10, the contour 151 of the first protruding structure and the contour 251 of the second protruding structure are broken line segments. At this time, the two sides 152 of the first protruding structure 15 that form the top corners , 153 are respectively substantially parallel to the two

sides

111, 112 of the first light-emitting layer body 11, and the two

sides

252, 253 of the second protruding structure 25 forming the top corner are respectively connected to the two sides 211 of the second light-emitting

layer body

21 , 212 is roughly parallel.

According to an embodiment of the present application, referring to FIGS. 9 and 10, the point where the extension lines of the two adjacent sides of the first light-emitting layer body 11 intersect is a first virtual vertex 141, and the second light-emitting layer body 21 The point where the extension lines of the two adjacent sides intersect is a second virtual vertex 241, the first virtual vertex 141 is located in the first compensation part 13, and the second virtual vertex 241 is located in the second compensation部23内.

According to an embodiment of the present application, referring to FIG. 10, the polyline segment includes a plurality of linear segments 254 connected in sequence, wherein two linear segments connected to the light-emitting body in the polyline segment intersect with extension lines in a direction approaching each other The point at is a virtual intersection point 51, and the line between the two

end points

52, 53 connecting the polyline segment and the main body of the light-emitting layer and the virtual intersection point 51 and the polyline segment together form a virtual polygon 50. It should be noted that the polyline segment is a theoretical contour. In actual production, the positions of each corner will show a certain arc-shaped angle due to process reasons, as long as the outline shows a polyline shape.

According to the embodiment of the present application, in the extension direction of any one of the two adjacent sides of the first light-emitting layer body 11, the side extends in a direction away from the first light-emitting layer body 11 The length L1 accounts for 1/5 to 1/3 of the total dimension L2 of the first light-emitting layer 10 in the extending direction of the side. In the extension direction of any one of the two adjacent sides of the second light-emitting layer body 21, the length L3 of the portion of the side that extends away from the second light-emitting layer body 21 occupies the second The light emitting layer 20 is 1/5 to 1/3 of the total dimension L4 in the direction in which the side extends.

According to a specific embodiment of the present application, referring to FIG. 9, the contours of the first convex structure 15 and the second convex structure 25 are arc segments, and the contours of the first convex structure constitute an arc The radius of curvature R1 of the segment is 1/5 to 1/3 of the side length L5 of the first light-emitting layer 10, and the radius of curvature R2 of the arc segment formed by the contour of the second convex structure is the second light-emitting layer. 1/5 to 1/3 of the side length L6 of the layer 20; or, referring to FIG. 10, the contours of the first convex structure and the second convex structure are both broken line segments, and the first convex structure The side length L7 of the virtual polygon formed by the polyline segment formed by the contour of the first light-emitting layer is 1/5 to 1/3 of the side length L5 of the first light-emitting layer, and the polyline segment formed by the contour of the second convex structure forms a virtual polygon The side length L8 of the polygon is 1/5 to 1/3 of the side length of the second light-emitting layer L6. Therefore, under the premise of Margin, the aperture ratio can be improved, and the risk of color mixing is low.

According to an embodiment of the present application, referring to FIG. 9, the contour 151 of the first convex structure and the contour 251 of the second convex structure are both arc segments, and the contour 151 of the first convex structure constitutes The arc segment formed by the arc segment and the contour 251 of the second convex structure is symmetrical with respect to the straight line jj perpendicular to the first direction; or, referring to FIG. 10, the contour 151 of the first convex structure is symmetrical to the contour 251 of the second convex structure. The contours 251 of the second convex structure are all broken line segments, and the broken line segments formed by the contour 151 of the first convex structure and the contour 251 formed by the second convex structure are relatively perpendicular to the first direction. The straight line kk is symmetrical.

According to an embodiment of the present application, referring to FIGS. 9 and 10, the virtual vertex 141 of the first vertex and the virtual vertex 241 of the second vertex are located on a straight line 11 or mm parallel to the first direction .

According to an embodiment of the present application, referring to FIG. 11, the orthographic projection of the virtual vertex 141 of the first vertex angle on the substrate is located within the orthographic projection of the second light-emitting layer 20 on the substrate, and the second vertex angle The orthographic projection of the virtual vertex 241 on the substrate is located within the orthographic projection of the first light-emitting layer 10 on the substrate. In some specific embodiments, referring to FIG. 12, the virtual vertex 141 of the first vertex and the virtual vertex 241 of the second vertex are staggered on the first square, that is, the virtual vertex 141 of the first vertex is located on the first square. The virtual vertex 241 of the two vertex corners is away from the side of the first sub-pixel, and the virtual vertex 241 of the second vertex corner is located on the side of the virtual vertex 141 of the first vertex away from the second sub-pixel.

According to the embodiment of the present application, the shape of the first light-emitting layer 10 and the second light-emitting layer 20 is a quadrilateral, a hexagon or an octagon with a convex structure at the top corners, and the first virtual vertex 141 is The angle α1 of and the angle α2 at the second virtual vertex 241 are each independently 45 degrees to 135 degrees, such as 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees, and so on.

According to an embodiment of the present application, referring to FIGS. 9 and 10, a plurality of first sub-pixels and a plurality of second sub-pixels are alternately arranged in a second direction perpendicular to the first direction, and all adjacent ones in the second direction are arranged alternately. The first light-emitting layer 10 and the second light-emitting layer 20 have opposite apex angles in the second direction; wherein, in the second direction, the first light-emitting layer 10 and the second light-emitting layer 20 The vertex angle opposite to the vertex angle of the second light-emitting layer is the third vertex angle 16, and the vertex angle of the second light-emitting layer opposite to the vertex angle of the first light-emitting layer is the fourth vertex angle 26, and the first light-emitting layer 10 includes A third compensating portion 17 protruding at the third vertex, the third compensating portion 17 and the first light-emitting layer body 11 are connected as a whole at the third vertex, and the second light-emitting layer 20 includes a fourth A fourth compensating part 27 protruding at the top corner, the fourth compensating part 27 and the second light-emitting layer main body 21 are connected as a whole at the fourth top corner, the third compensating part 17 and the fourth compensating part 27 partially overlap; and in the second direction, the orthographic projection of the third compensation portion 17 and the fourth compensation portion 27 on the substrate is located in the light-emitting area 12 of the first sub-pixel and the The light-emitting area 22 of the second sub-pixel is between the orthographic projection of the substrate, and is different from the light-emitting area 12 of the first sub-pixel and the light-emitting area 22 of the second sub-pixel on the orthographic projection of the substrate. overlap.

According to the embodiment of the present application, the third apex angle and the fourth apex angle may be the same as the first apex angle and the second apex angle described above, that is, all the features and advantages applicable to the first apex angle are applicable to the third apex angle. The vertex angle, all the features and advantages applicable to the second vertex angle are applicable to the fourth vertex angle, and will not be repeated here.

According to an embodiment of the present application, referring to FIG. 13, the display backplane further includes a plurality of third sub-pixels, and the third sub-pixels are formed as two first sub-pixels and two second sub-pixels in a 2*2 matrix. Surrounded by pixels; the third sub-pixel includes a third light-emitting layer 30, and the opening of the pixel defining layer is configured to define the light-emitting area 32 of the third sub-pixel.

According to an embodiment of the present application, referring to FIG. 13, the centers of the light-emitting regions of the two first sub-pixels and the two second sub-pixels forming a 2*2 matrix are respectively located at the four vertices of a virtual rectangle 40, and the The light-emitting area of the third sub-pixel surrounded by the two first sub-pixels and the two second sub-pixels is located at the center 42 of the virtual rectangle.

According to an embodiment of the present application, referring to FIG. 13, the contours of the convex structures at the top corners of the first light-emitting layer and the second light-emitting layer are arc segments, and the third light-emitting layer is a rectangle with rounded corners. Or, referring to FIG. 14, the contours of the convex structures at the top corners of the first light-emitting layer and the second light-emitting layer are both broken line segments, and the third light-emitting layer is a rectangle with rounded corners.

In the third aspect of the present application, the present application provides a display backplane. According to an embodiment of the present application, referring to FIG. 15, the display backplane includes: a substrate; a plurality of first sub-pixels and a plurality of second sub-pixels arranged alternately along a first direction on the substrate, the first The sub-pixel includes a first light-emitting layer 10, and the second sub-pixel includes a second light-emitting layer 20. Both the first light-emitting layer 10 and the second light-emitting layer 20 are polygonal and are adjacent to each other in the first direction. The first light-emitting layer 10 and the second light-emitting layer 20 have opposite apex angles in the first direction; the pixel defining layer has a plurality of openings configured to define a plurality of first sub-pixels and a plurality of second sub-pixels. The light-emitting area of the sub-pixel; wherein, in the opposing corners of the adjacent first light-emitting layer 10 and the second light-emitting layer 20, the distance between the first light-emitting layer 10 and the second light-emitting layer 20 The vertex angle opposite to the vertex angle is the first vertex angle 14, the vertex angle of the second light-emitting layer 20 opposite to the vertex angle of the first light-emitting layer 10 is the second vertex angle 24, and the first vertex angle 14 The part extending and intersecting with the two sides of the second vertex 24 to the vertex is formed as a straight line segment 120 so that the vertex angle becomes a chamfer, and the straight segment of the first vertex angle and the first vertex angle The straight line segments at the two vertex angles at least partially overlap; the orthographic projection of the light-emitting area 12 of the first sub-pixel on the substrate falls within the orthographic projection of the first light-emitting layer 10 on the substrate, and the The orthographic projection of the light-emitting area 22 of the second sub-pixel on the substrate falls within the orthographic projection of the second light-emitting layer 20 on the substrate, and in the first direction, the flat chamfered straight line The orthographic projection of the segment 120 on the substrate is located between the light-emitting area 12 of the first sub-pixel and the light-emitting area 22 of the second sub-pixel between the orthographic projection of the substrate and is connected to the first sub-pixel. The light-emitting area 12 and the light-emitting area 22 of the second sub-pixel do not overlap in the orthographic projection of the substrate. In this display backplane, by overlapping the borders at the adjacent first and second corners, the alignment offsets (Margins) of the mask openings are the same during the preparation process, especially The margins at the top corners are the same, so that the pixel area can be fully utilized and the aperture ratio can be improved.

According to an embodiment of the present application, the length L of the overlapping portion of the straight line segment at the first vertex and the straight line segment at the second vertex can be greater than 10 microns and less than or equal to 0.41X, where X is two adjacent sub-pixels in the pixel defining layer. The spacing between pixel openings (or PDL Gap). As a result, the opening of the mask forming the light-emitting layer is easy to process, with precision and accuracy, which can avoid the limitation of the processing technology, which makes the processing accuracy of the straight line poor and cannot form a straight line or is severely deformed.

According to an embodiment of the present application, the point where the extension lines of the two sides of the flat chamfer in the direction of the vertex intersect are the virtual vertex of the vertex; the virtual vertex 141 of the first vertex and the second vertex 141 The virtual vertex 241 of is located on a straight line nn parallel to the first direction.

According to an embodiment of the present application, the orthographic projection of the virtual vertex 141 of the first vertex angle on the substrate is within the orthographic projection of the second light-emitting layer 20 on the substrate, and the virtual vertex 241 of the second vertex angle is The orthographic projection on the substrate is located within the orthographic projection of the first light-emitting layer 10 on the substrate.

According to the embodiment of the present application, the shapes of the first light-emitting layer and the second light-emitting layer are quadrangular, hexagonal or octagonal, and the angle α1 of the virtual vertex of the first vertex angle and the second The angle α2 of the virtual vertex of the vertex angle is 45 degrees to 135 degrees independently, such as 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees, and so on.

According to an embodiment of the present application, referring to FIG. 15, a plurality of the first sub-pixels and a plurality of the second sub-pixels are alternately arranged in a second direction, and the first sub-pixels that are adjacent in the second direction The light-emitting layer 10 and the second light-emitting layer 20 have opposite apex angles in the second direction; wherein, in the second direction, the first light-emitting layer 10 and the second light-emitting layer 20 are adjacent to each other. Among the opposite vertex angles, the vertex angle of the first light-emitting layer 10 opposite to the vertex angle of the second light-emitting layer 20 is the third vertex angle 16, and the second light-emitting layer 20 and the first light-emitting layer 20 The vertex angle opposite to the vertex angle of the layer 10 is the fourth vertex angle 26, and the part where the two sides of the third vertex angle 16 and the fourth vertex angle 26 extend to the vertex of the vertex angle is formed as a line segment 140 to make the apex angle a flat chamfer, and the straight line segment of the third apex angle 16 and the straight line segment of the fourth apex angle 26 at least partially overlap; and in the second direction, the flat chamfer The straight line section 140 is located between the light-emitting area 12 of the first sub-pixel and the light-emitting area 22 of the second sub-pixel on the substrate in the orthographic projection of the substrate, and is in line with the orthographic projection of the first sub-pixel. The light-emitting area 12 of the pixel and the light-emitting area 22 of the second sub-pixel do not overlap in the orthographic projection of the substrate. Therefore, in the second direction, the risk of color mixing between the first light-emitting layer and the second light-emitting layer can be well avoided.

In the fourth aspect of the present application, the present application provides a mask assembly for preparing the light-emitting layer in the aforementioned display backplane. According to an embodiment of the present application, referring to FIG. 16, FIG. 17, and FIG. 18, the mask assembly includes: a first mask 300 having a plurality of first masks for forming a first light-emitting layer An opening 310; a second mask 400, the second mask having a plurality of second openings 410 for forming a second light-emitting layer. Therefore, the mask can be used to prepare the aforementioned display backplane, and the resulting light-emitting layer in the display backplane can significantly reduce the risk of color mixing.

It can be understood that when the light-emitting layer is formed by evaporation, the mask is positioned above the substrate, and the material forming the light-emitting layer is evaporated and deposited on the substrate through the openings on the mask. Therefore, the shape of the first opening can be the same as that of the first opening. The shape of the light-emitting layer is approximately the same, and the features applicable to the first light-emitting layer are also applicable to the first opening. For example, the top corner of the first opening has the arc line segment, straight line segment or compensation part corresponding to the first light-emitting layer, which will not be repeated here. Correspondingly, the shape of the second opening can be roughly the same as the shape of the second light-emitting layer. In the same way, the features applicable to the second light-emitting layer are also applicable to the second opening.

According to an embodiment of the present application, referring to FIGS. 19 and 20, the mask assembly may further include a third mask 500 having a plurality of third openings for forming a third light-emitting layer 510. Similar to the first opening and the second opening, the shape of the third opening may be approximately the same as the shape of the third light-emitting layer, and the features applicable to the third light-emitting layer are also applicable to the third opening. It should be noted that because the mask is usually formed by an etching process, the corners of each opening of the mask are also formed into a certain arc-shaped angle due to the limitation of the etching process. Further, the shape of the light-emitting layer formed by the vapor deposition of the mask is roughly the same as the shape of the mask opening, but for the position of the corner, the curvature of the arc is usually not less than the curvature of the arc at the corresponding corner of the mask opening . In addition, due to the vapor deposition process, the vapor-deposited luminescent material will diffuse to a certain extent, and due to the different distances from the evaporation source, the thickness of the formed light-emitting layer at the edge position will be slightly smaller than the thickness at the center position, and the light-emitting layer The range formed by the outermost diffusion will also be slightly larger than the size of the opening of the corresponding mask. In the above embodiment, the description of the light-emitting layer is based on the ideal shape and size, which is basically the same as the opening of the mask. The light-emitting layer formed on this basis due to the deviation caused by the process is also within the scope of the present application.

In the fifth aspect of the present application, the present application provides a display device. According to an embodiment of the present application, the display device includes the aforementioned display backplane. The display device has all the features and advantages of the aforementioned display backplane, and will not be repeated here.

According to the embodiment of the present application, the specific type of the display device is not particularly limited, and can be any known display device, for example, including but not limited to mobile phones, tablet computers, game consoles, televisions, wearable devices, and so on. It can be understood that, in addition to the flexible display device described above, the display device may also include the necessary structures and components of a conventional display device. Taking a mobile phone as an example, it may also include a touch screen, a fingerprint recognition module, and a camera module. Groups, sound systems, motherboards, memory and shells, etc., I won’t repeat them here.

In the description of this application, it should be understood that the terms “first” and “second” are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "a plurality of" means two or more than two, unless otherwise specifically defined.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , The structure, materials, or characteristics are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The embodiment undergoes changes, modifications, substitutions, and modifications.

Claims

A display backplane, including:

Substrate

A plurality of first sub-pixels and a plurality of second sub-pixels arranged alternately along a first direction on the substrate, the first sub-pixels include a first light-emitting layer, and the second sub-pixels include a second light-emitting layer , The first light-emitting layer and the second light-emitting layer are both polygonal, and the first light-emitting layer and the second light-emitting layer that are adjacent in the first direction have oppositely arranged tops in the first direction. angle;

A pixel defining layer having a plurality of openings configured to define light-emitting regions of a plurality of first sub-pixels and a plurality of second sub-pixels;

Wherein, among the opposite vertex angles of the adjacent first light-emitting layer and the second light-emitting layer, the vertex angle of the first light-emitting layer opposite to the vertex angle of the second light-emitting layer is the first vertex angle. Angle, the apex angle of the second light-emitting layer opposite to the apex angle of the first light-emitting layer is the second apex angle, and at least one of the first apex angle and the second apex angle is two The part where the edges extend and meet their vertices is formed as an arc segment or a straight line segment so that the vertex corner becomes a round chamfer or a flat chamfer;

The orthographic projection of the light-emitting area of the first sub-pixel on the substrate falls within the orthographic projection of the first light-emitting layer on the substrate, and the light-emitting area of the second sub-pixel is on the substrate The orthographic projection of the second light-emitting layer falls within the orthographic projection of the second light-emitting layer on the substrate, and in the first direction, the arc or straight line segment of the round chamfer or the flat chamfer is in the The orthographic projection of the substrate is located between the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel between the orthographic projection of the substrate, and is in contrast to the light-emitting area of the first sub-pixel and the second sub-pixel. The light-emitting areas of the sub-pixels do not overlap in the orthographic projection of the substrate.
The display backplane according to claim 1, wherein there is a gap between the first vertex corner and the second vertex corner.
3. The display backplane according to claim 1 or 2, wherein the two end points of the arc segment are connected or the straight segment extends in a second direction, and the second direction is perpendicular to the first direction.
The display backboard according to any one of claims 1 to 3, wherein the point where the extension lines extending from the two sides of the round chamfer or the flat chamfer to the vertex direction intersect is the virtual vertex of the vertex;

The virtual vertex of the first vertex angle and the virtual vertex of the second vertex angle are located on a straight line parallel to the first direction.
The display backplane according to claim 3, wherein the orthographic projection of the virtual vertex of the first vertex on the substrate is located within the orthographic projection of the second light-emitting layer on the substrate, and the virtual vertex of the second vertex is The orthographic projection of the vertex on the substrate is located within the orthographic projection of the first light-emitting layer on the substrate.
The display backplane according to claim 3 or 4, wherein the shape of the first light-emitting layer and the second light-emitting layer are quadrangular, hexagonal or octagonal, and the first light-emitting layer and the second light-emitting layer are The angle at the virtual vertex of the opposing vertex angle of the light-emitting layer is 45 degrees to 135 degrees.
The display backplane according to any one of claims 1 to 6, wherein the first apex angle and the second apex angle both have the arc segment, and the arc segment of the first apex angle and The arc segment of the second vertex angle is symmetrical with respect to a straight line perpendicular to the first direction; or,

Both the first apex angle and the second apex angle have the straight line segment, and the straight line segment of the first apex angle and the straight line segment of the second apex angle are symmetrical with respect to a straight line perpendicular to the first direction.
7. The display backplane according to any one of claims 2 to 7, wherein a plurality of the first sub-pixels and a plurality of the second sub-pixels are alternately arranged in the second direction, and in the second direction The adjacent first light-emitting layer and the second light-emitting layer have oppositely arranged apex angles in the second direction;

Wherein, in the second direction, among the opposite vertex angles of the adjacent first light-emitting layer and the second light-emitting layer, the vertex angle between the first light-emitting layer and the second light-emitting layer is The opposite apex angle is the third apex angle, the apex angle of the second light-emitting layer opposite to the apex angle of the first light-emitting layer is the fourth apex angle, the third apex angle and the fourth apex angle At least one of the two sides of the apex angle extends and meets the apex of the apex angle to form an arc segment or a straight line segment so that the apex corner becomes a round or flat chamfer;

And in the second direction, the orthographic projection of the round or chamfered arc segment or straight line segment on the substrate is located between the light-emitting area of the first sub-pixel and the second sub-pixel. The light-emitting area of the pixel is between the orthographic projection of the substrate, and does not overlap with the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel on the orthographic projection of the substrate.
8. The display backplane of claim 8, wherein there is a gap between the third vertex and the fourth vertex.
The display backplane according to any one of claims 1 to 8, further comprising a plurality of third sub-pixels, and the third sub-pixels are formed into two first sub-pixels and two second sub-pixels in a 2*2 matrix. Surrounded by the second sub-pixels;

The third sub-pixel includes a third light-emitting layer, and the opening of the pixel defining layer is configured to define a light-emitting area of the third sub-pixel.
11. The display backplane according to claim 10, wherein the centers of the light-emitting regions of the two first sub-pixels and the two second sub-pixels forming the 2*2 matrix are respectively located at four vertices of a virtual rectangle , The light-emitting area of the third sub-pixel surrounded by the two first sub-pixels and the two second sub-pixels is located at the center of the virtual rectangle.
The display backplane according to claim 10 or 11, wherein the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer are all rectangles with rounded corners, or the first light-emitting layer and the The second light-emitting layer is rectangular and each of the four corners is flat, and the third light-emitting layer is a rectangle with rounded corners.
The display backplane according to any one of claims 10 to 12, for the two first sub-pixels and two second sub-pixels forming a 2*2 matrix and the third sub-pixel enclosed therein, the The first light-emitting layer and the second light-emitting layer have gaps at their respective top corners and the boundary of the third light-emitting layer, and the first light-emitting layer and the second light-emitting layer are on one side. The non-apex corner of is connected with the boundary of the third light-emitting layer.
The display backplane according to any one of claims 10 to 12, wherein the first sub-pixel is a red sub-pixel, the second sub-pixel is a blue sub-pixel, and the third sub-pixel is a green sub-pixel .
The display backplane according to any one of claims 10 to 14, wherein the first light-emitting layer and the second light-emitting layer are both rounded squares, and the area of the second light-emitting layer is larger than the area of the first light-emitting layer , The third light-emitting layer is a rectangle with rounded corners, the long side of the rounded rectangle is the side close to the second light-emitting layer, and the short side of the rounded rectangle is the side close to the first light-emitting layer的边。 The side.
A display backplane, including:

Substrate

A plurality of first sub-pixels and a plurality of second sub-pixels arranged alternately along a first direction on the substrate, the first sub-pixels include a first light-emitting layer, and the second sub-pixels include a second light-emitting layer , The first light-emitting layer and the second light-emitting layer adjacent in the first direction have opposite apex angles in the first direction, and the first light-emitting layer and the second light-emitting layer The vertex angle opposite to the vertex angle of the second light-emitting layer is the first vertex angle, the vertex angle of the second light-emitting layer opposite to the vertex angle of the first light-emitting layer is the second vertex angle, and the first light-emitting layer includes the first light-emitting layer. The first compensating portion protruding at the first vertex and the main body of the layer, the first compensating portion and the first light-emitting layer body are connected as a whole at the first vertex, and the second light-emitting layer includes a second light-emitting layer. The layer body and the second compensation portion protruding at the second vertex, the second compensation portion and the second light-emitting layer body are connected as a whole at the second vertex, the first compensation portion and the second compensation Partial overlap

A pixel defining layer having a plurality of openings configured to define light-emitting regions of a plurality of the first sub-pixels and a plurality of the second sub-pixels;

Wherein, the orthographic projection of the light-emitting area of the first sub-pixel on the substrate falls within the orthographic projection of the first light-emitting layer on the substrate, and the light-emitting area of the second sub-pixel is on the substrate. The orthographic projection of the second light-emitting layer falls within the orthographic projection of the second light-emitting layer on the substrate, and in the first direction, the first compensation portion and the second compensation portion are on the front of the substrate. The projection is located between the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel between the orthographic projection of the substrate, and is in line with the light-emitting area of the first sub-pixel and the second sub-pixel. There is no overlap of the light emitting area on the orthographic projection of the substrate.
16. The display backplane according to claim 16, wherein the first compensation portion includes two adjacent sides of the first light-emitting layer main body, and parts close to the first vertex angle are respectively directed away from the first light-emitting layer main body The first protruding structure formed by expanding in the direction of the second luminous layer and converging toward the first vertex, the second compensation portion includes two adjacent sides of the second light-emitting layer main body, and the portions close to the second vertex are respectively directed toward A second protruding structure formed by expanding away from the main body of the second light-emitting layer and converging toward the second vertex;

The contour of the first protruding structure connecting the two adjacent sides of the first light-emitting layer is an arc segment or a polyline segment;

The contour of the second protruding structure connecting the two adjacent sides of the second light-emitting layer is an arc segment or a broken line segment.
The display backplane according to claim 16 or 17, the point at which the extension lines of the two adjacent sides of the first light-emitting layer body intersect is a first virtual vertex, and the two points of the second light-emitting layer body The point where the extension lines of the adjacent sides intersect is a second virtual vertex, the first virtual vertex is located in the first compensation portion, and the second virtual vertex is located in the second compensation portion.
The display backplane according to any one of claims 16 to 18, in the extension direction of any one of the two adjacent sides of the first light-emitting layer main body, the side is far away from the first light-emitting layer. The length of the portion of the layer body that extends in the direction accounts for 1/5 to 1/3 of the total size of the first light-emitting layer in the direction in which the side extends.
The display backplane according to any one of claims 17 to 19, the broken line segment comprises a plurality of straight line segments connected in sequence, wherein the two straight line segments connected to the main body of the light-emitting layer in the broken line segment are close to each other The point where the extension lines of the direction intersect is a virtual intersection point, and the line between the two end points connecting the polyline segment and the main body of the light-emitting layer and the virtual intersection point and the polyline segment together form a virtual polygon.
The display backplane according to any one of claims 17 to 20, the contours of the first protruding structure and the second protruding structure are arc segments, and the contours of the first protruding structure constitute The radius of curvature of the arc segment is 1/5 to 1/3 of the side length of the first light-emitting layer, and the radius of curvature of the arc segment formed by the contour of the second convex structure is that of the second light-emitting layer 1/5～1/3 of the side length of; or,

The contours of the first protruding structure and the second protruding structure are both broken line segments, and the side length of the virtual polygon formed by the broken line segment formed by the contours of the first protruding structure is that of the first light-emitting layer The side length is 1/5 to 1/3 of the side length, and the side length of the virtual polygon formed by the polyline segment formed by the contour of the second convex structure is 1/5 to 1/3 of the side length of the second light-emitting layer.
18. The display backplane according to any one of claims 17 to 20, wherein the contour of the first convex structure and the contour of the second convex structure are arc segments, and the first convex structure The arc segment formed by the contour of the second convex structure and the arc segment formed by the contour of the second convex structure are symmetrical with respect to a straight line perpendicular to the first direction; or,

The contour of the first convex structure and the contour of the second convex structure are both broken line segments, and the broken line segment formed by the contour of the first convex structure and the contour of the second convex structure are formed The broken line segment is symmetrical with respect to a straight line perpendicular to the first direction.
The display backplane according to any one of claims 18 to 22, wherein the virtual apex of the first apex angle and the virtual apex of the second apex angle are located on a straight line parallel to the first direction.
22. The display backplane according to any one of claims 18-22, wherein the orthographic projection of the virtual vertex of the first vertex on the substrate is located within the orthographic projection of the second light-emitting layer on the substrate, The orthographic projection of the virtual vertex of the second vertex on the substrate is located within the orthographic projection of the first light-emitting layer on the substrate.
The display backplane according to any one of claims 18 to 24, wherein the shape of the first light-emitting layer and the second light-emitting layer is a quadrilateral, a hexagon or an octagon with a convex structure at the top corners, The angle at the virtual apex of the first apex angle and the angle at the virtual apex of the second apex angle are respectively 45 degrees to 135 degrees.
The display backplane according to any one of claims 16 to 25, wherein a plurality of the first sub-pixels and a plurality of the second sub-pixels are alternately arranged in a second direction perpendicular to the first direction, and are arranged in the The first light-emitting layer and the second light-emitting layer that are adjacent in the second direction have opposite apex angles in the second direction;

Wherein, in the second direction, the vertex angle of the first light-emitting layer opposite to the vertex angle of the second light-emitting layer is the third vertex angle, and the vertex angle of the second light-emitting layer is the same as that of the first light-emitting layer. The vertex angle opposite to the vertex angle of the layer is the fourth vertex angle, the first light-emitting layer includes a third compensation portion protruding at the third vertex angle, and the third compensation portion is connected to the main body of the first light-emitting layer. Connected as a whole at the third vertex, the second light-emitting layer includes a fourth compensating portion protruding at the fourth vertex, and the fourth compensating portion and the second light-emitting layer main body are in the first The four vertex corners are connected as a whole, and the third compensation part and the fourth compensation part partially overlap;

And in the second direction, the orthographic projection of the third compensation portion and the fourth compensation portion on the substrate is located in the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel. There is no overlap between the orthographic projections of the substrate and the orthographic projections of the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel on the substrate.
The display backplane according to any one of claims 16 to 26, further comprising a plurality of third sub-pixels, and the third sub-pixels are formed as two first sub-pixels and two second sub-pixels in a 2*2 matrix. Surrounded by two sub-pixels;

The third sub-pixel includes a third light-emitting layer, and the opening of the pixel defining layer is configured to define a light-emitting area of the third sub-pixel.
The display backplane according to claim 27, wherein the centers of the light-emitting areas of the two first sub-pixels and the two second sub-pixels forming a 2*2 matrix are respectively located at four vertices of a virtual rectangle, and the The light-emitting area of the third sub-pixel surrounded by the two first sub-pixels and the two second sub-pixels is located at the center of the virtual rectangle.
The display backplane according to claim 27 or 28, the contours of the convex structures at the top corners of the first light-emitting layer and the second light-emitting layer are all arc segments, and the third light-emitting layer is a circle The corners are rectangular, or the contours of the convex structures at the top corners of the first light-emitting layer and the second light-emitting layer are both broken line segments, and the third light-emitting layer is a rectangle with rounded corners.
The display backplane according to any one of claims 27-29, wherein the first sub-pixel is a red sub-pixel, the second sub-pixel is a blue sub-pixel, and the third sub-pixel is a green sub-pixel .
The display backplane according to any one of claims 27 to 30, wherein the first light-emitting layer and the second light-emitting layer are both squares with four corners with protruding structures, and the four corners are protruding The contours of the structure are all circular arcs, and the area of the second light-emitting layer is larger than the area of the first light-emitting layer, the third light-emitting layer is a rounded rectangle, and the long side of the rounded rectangle is close to For the side of the second light-emitting layer, the short side of the rounded rectangle is the side close to the first light-emitting layer.
A display backplane, including:

Substrate

A plurality of first sub-pixels and a plurality of second sub-pixels arranged alternately along a first direction on the substrate, the first sub-pixels include a first light-emitting layer, and the second sub-pixels include a second light-emitting layer , The first light-emitting layer and the second light-emitting layer are both polygonal, and the first light-emitting layer and the second light-emitting layer that are adjacent in the first direction have oppositely arranged tops in the first direction. angle;

A pixel defining layer having a plurality of openings configured to define light-emitting regions of a plurality of first sub-pixels and a plurality of second sub-pixels;

Wherein, among the opposite vertex angles of the adjacent first light-emitting layer and the second light-emitting layer, the vertex angle of the first light-emitting layer opposite to the vertex angle of the second light-emitting layer is the first vertex angle. Angle, the vertex angle of the second light-emitting layer opposite to the vertex angle of the first light-emitting layer is the second vertex angle, and the two sides of the first vertex angle and the second vertex angle extend toward the vertex The intersecting part is formed as a straight line segment so that the apex angle becomes flat and chamfered, and the straight line segment of the first apex angle and the straight line segment of the second apex angle at least partially overlap;

The orthographic projection of the light-emitting area of the first sub-pixel on the substrate falls within the orthographic projection of the first light-emitting layer on the substrate, and the light-emitting area of the second sub-pixel is on the substrate The orthographic projection of the second light-emitting layer falls within the orthographic projection of the second light-emitting layer on the substrate, and in the first direction, the straight line segment of the flat chamfer is located in the orthographic projection of the substrate on the first sub The light-emitting area of the pixel and the light-emitting area of the second sub-pixel are between the orthographic projection of the substrate, and the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel are in the area of the substrate. None of the orthographic projections overlap.
The display backplane according to claim 32, wherein a plurality of the first sub-pixels and a plurality of the second sub-pixels are alternately arranged in a second direction perpendicular to the first direction, and in the second direction The adjacent first light-emitting layer and the second light-emitting layer have oppositely arranged apex angles in the second direction;

Wherein, in the second direction, among the opposite vertex angles of the adjacent first light-emitting layer and the second light-emitting layer, the vertex angle between the first light-emitting layer and the second light-emitting layer is The opposite apex angle is the third apex angle, the apex angle of the second light-emitting layer opposite to the apex angle of the first light-emitting layer is the fourth apex angle, the third apex angle and the fourth apex angle The part where the two sides of at least one apex angle extend to the apex of the apex angle and meet is formed as a straight line segment so that the apex angle becomes flat and chamfered, and the straight line segment of the third apex angle and the first apex angle The straight lines of the four vertex corners overlap at least partially;

And in the second direction, the orthographic projection of the straight line segment of the flat chamfer on the substrate is located in the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel is located on the front of the substrate. There is no overlap between the projections and the orthographic projection of the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel on the substrate.
A mask assembly for preparing the light-emitting layer in the display backplane according to any one of claims 1 to 33, comprising:

A first mask, the first mask having a plurality of first openings for forming a first light-emitting layer;

The second mask has a plurality of second openings for forming the second light-emitting layer.
The mask assembly of claim 34, further comprising:

A third mask, which has a plurality of third openings for forming a third light-emitting layer.