CN210926019U

CN210926019U - Display back plate, mask plate assembly and display device

Info

Publication number: CN210926019U
Application number: CN201921878161.5U
Authority: CN
Inventors: 徐鹏; 丁渭渭; 邓江涛
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-07-03
Anticipated expiration: 2029-10-31

Abstract

The utility model provides a show backplate and mask version subassembly, this shows the backplate and includes: a substrate; a plurality of first sub-pixels and a plurality of second sub-pixels disposed on the substrate, the first light emitting layer in the adjacent first sub-pixels and the second light emitting layer in the adjacent second sub-pixels having apex angles disposed opposite to each other in a first direction; a pixel defining layer having a plurality of openings configured to define light emitting areas of a plurality of first sub-pixels and a plurality of second sub-pixels; in the first direction, a first vertex angle of the first light-emitting layer is opposite to a second vertex angle of the second light-emitting layer, a part where two edges of at least one vertex angle of the first vertex angle and the second vertex angle extend and meet towards the vertex angle is formed into an arc line segment or a straight line segment, so that the vertex angle is a round chamfer or a flat chamfer, and a gap is formed between the first vertex angle and the second vertex angle. The display back plate can effectively improve the color mixing risk at the top corner of the light-emitting layer, and is easy to prepare.

Description

Display back plate, mask plate assembly and display device

Technical Field

The utility model relates to a show technical field, it is specific, relate to and show backplate, mask version subassembly and display device.

Background

The OLED display device is widely used due to its advantages of vivid color, low power consumption, fast response speed, etc., wherein the light emitting layer is usually formed in the openings of the Pixel Definition Layer (PDL) by an evaporation method, each light emitting layer needs to correspond to one pixel definition layer opening, and therefore, a mask (such as a high precision metal mask (FMM)) is used to form the light emitting layer at the corresponding opening position, that is, the mask has FMM openings corresponding to the PDL openings, and the material of the light emitting layer is deposited in the PDL openings through the FMM openings during evaporation. However, in the related art, the pixel area is not fully utilized, and the color mixing or lack risk of the product is high.

Thus, the related art of the current OLED display device still needs to be improved.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide a display back plate capable of improving color mixing, color missing or aperture ratio.

In a first aspect of the present invention, the utility model provides a display back plate. According to the utility model discloses an embodiment, this demonstration backplate includes: a substrate; the display panel comprises a substrate, a plurality of first sub-pixels and a plurality of second sub-pixels, wherein the plurality of first sub-pixels and the plurality of second sub-pixels are arranged on the substrate and are alternately arranged along a first direction, the first sub-pixels comprise first light-emitting layers, the second sub-pixels comprise second light-emitting layers, the first light-emitting layers and the second light-emitting layers are both polygonal, and the first light-emitting layers and the second light-emitting layers which are adjacent to each other in the first direction have opposite vertex angles in the first direction; a pixel defining layer having a plurality of openings configured to define light emitting areas of a plurality of first sub-pixels and a plurality of second sub-pixels; 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, which is opposite to the vertex angle of the second light-emitting layer, is a first vertex angle, the vertex angle of the second light-emitting layer, which is opposite to the vertex angle of the first light-emitting layer, is a second vertex angle, and a part where two edges of at least one vertex angle of the first vertex angle and the second vertex angle extend and meet towards the vertex angle is formed into an arc line segment or a straight line segment so that the vertex angle becomes a round chamfer or a flat chamfer, and a gap is formed between the first vertex angle and the second vertex angle; the orthographic projection of the light emitting area of the first sub-pixel on the substrate falls into 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 into the orthographic projection of the second light emitting layer on the substrate, in a first direction, the orthographic projection of the arc line segment or the straight line segment of the round chamfer or the flat chamfer on the substrate is positioned between the orthographic projection of the light emitting area of the first sub-pixel and the orthographic projection of the light emitting area of the second sub-pixel on the substrate, and the orthographic projection of the light emitting area of the first sub-pixel and the orthographic projection of the light emitting area of the second sub-pixel on the substrate are not overlapped.

Optionally, a connection line between two end points of the arc segment or the straight segment extends in a second direction, and the second direction is perpendicular to the first direction.

Optionally, a point where extension lines of two sides of the round chamfer or the flat chamfer to the vertex direction of the round chamfer or the flat chamfer intersect is a virtual vertex of the vertex angle; 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.

Optionally, an orthographic projection of the virtual vertex of the first vertex angle on the substrate is located in an orthographic projection of the second light emitting layer on the substrate, and an orthographic projection of the virtual vertex of the second vertex angle on the substrate is located in an orthographic projection of the first light emitting layer on the substrate.

Optionally, the first light-emitting layer and the second light-emitting layer are quadrilateral, hexagonal or octagonal, and an angle at a virtual vertex of opposite vertex angles of the first light-emitting layer and the second light-emitting layer is 45 degrees to 135 degrees.

Optionally, the first vertex angle and the second vertex angle both have the arc line segment, and the arc line segment of the first vertex angle and the arc line segment of the second vertex angle are symmetrical with respect to a straight line perpendicular to the first direction; or the first vertex angle and the second vertex angle are both provided with the straight line segments, and the straight line segments of the first vertex angle and the second vertex angle are relatively symmetrical to a straight line vertical to the first direction.

Optionally, the plurality of first sub-pixels and the plurality of second sub-pixels are alternately arranged in the first direction and the second direction, and the first light emitting layer and the second light emitting layer adjacent to each other in the first direction have the apex angle oppositely arranged in the first direction, and the first light emitting layer and the second light emitting layer adjacent to each other in the second direction have the apex angle oppositely arranged in the second direction; in the first direction and the second direction, of opposite vertex angles of the first light-emitting layer and the second light-emitting layer which are adjacent to each other, a vertex angle of the first light-emitting layer, which is opposite to a vertex angle of the second light-emitting layer, is a third vertex angle, a vertex angle of the second light-emitting layer, which is opposite to the vertex angle of the first light-emitting layer, is a fourth vertex angle, at least one vertex angle of the third vertex angle and the fourth vertex angle is the first light-emitting layer and/or the second light-emitting layer, the vertex angle, which is oppositely arranged, is extended and intersected from two edges of the vertex angle to a vertex angle of the vertex angle, is formed into an arc line segment or a straight line segment so that the vertex angle becomes a round chamfer or a flat chamfer, and a gap is formed between the opposite vertex angles of the first light-emitting layer and the second light-emitting layer which are adjacent to the; in the first direction and the second direction, the orthographic projection of the arc line segment or straight line segment of the round chamfer or the flat chamfer on the substrate is positioned between the orthographic projection of the light emitting area of the first sub-pixel and the orthographic projection of the light emitting area of the second sub-pixel on the substrate, and the orthographic projection of the light emitting area of the first sub-pixel and the orthographic projection of the light emitting area of the second sub-pixel on the substrate are not overlapped.

Optionally, the display backplane further comprises a plurality of third sub-pixels, the third sub-pixels being surrounded by two of the first sub-pixels and two of the second sub-pixels formed in a 2 x 2 matrix; 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 region of the third sub-pixel.

Optionally, centers of the light emitting areas of the two first sub-pixels and the two second sub-pixels forming the 2 × 2 matrix are located at four vertices of a virtual rectangle, respectively, and 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.

Optionally, the first light emitting layer, the second light emitting layer, and the third light emitting layer are all rounded rectangles, or the first light emitting layer and the second light emitting layer are all rectangles, four corners of each rectangle are flat corners, and the third light emitting layer is a rounded rectangle.

Optionally, for the two first sub-pixels and the two second sub-pixels forming the 2 × 2 matrix and the third sub-pixel enclosed therein, the first light emitting layer and the second light emitting layer have a gap at each vertex angle between the first light emitting layer 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 boundary of the third light emitting layer at a non-vertex angle of one edge.

Optionally, 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.

Optionally, the first light emitting layer and the second light emitting layer are rounded squares, the area of the second light emitting layer is larger than that of the first light emitting layer, the third light emitting layer is a rounded rectangle, 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 a second aspect of the present invention, the utility model provides a display back plate. According to the utility model discloses an embodiment, this demonstration backplate includes: a substrate; a plurality of first sub-pixels and a plurality of second sub-pixels alternately arranged along a first direction on the substrate, the first sub-pixels including a first light emitting layer, the second sub-pixels including a second light emitting layer, the first light emitting layer and the second light emitting layer adjacent to each other in the first direction having vertex angles oppositely arranged in the first direction, the vertex angle of the first light emitting layer opposite to the vertex angle of the second light emitting layer being a first vertex angle, the vertex angle of the second light emitting layer opposite to the vertex angle of the first light emitting layer being a second vertex angle, the first light emitting layer including a first light emitting layer main body and a first compensation portion protruding at the first vertex angle, the first compensation portion being integrally connected to the first light emitting layer main body at the first vertex angle, the second light emitting layer including a second light emitting layer main body and a second compensation portion protruding at the second vertex angle, the second compensation part is integrally connected with the second luminous layer main body at a second top angle, and the first compensation part and the second compensation part are partially overlapped; a pixel defining layer having a plurality of openings configured to define light emitting areas of the plurality of first and second sub-pixels; wherein an orthographic projection of the light emitting area of the first sub-pixel on the substrate falls within an orthographic projection of the first light emitting layer on the substrate, an orthographic projection of the light emitting area of the second sub-pixel on the substrate falls within an orthographic projection of the second light emitting layer on the substrate, and in the first direction, the orthographic projections of the first compensation portion and the second compensation portion on the substrate are located between 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, and do not overlap with 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.

Optionally, the first compensation portion includes a first protruding structure formed by portions, close to the first vertex, of two adjacent sides of the first light emitting layer main body respectively extending in a direction away from the first light emitting layer main body and intersecting at the first vertex, and the second compensation portion includes a second protruding structure formed by portions, close to the second vertex, of two adjacent sides of the second light emitting layer main body respectively extending in a direction away from the second light emitting layer main body and intersecting at the second vertex; the outline of the first protruding structure connecting the two adjacent edges of the first light-emitting layer is an arc line segment or a broken line segment; the outline of the second protruding structure connecting the two adjacent sides of the second light-emitting layer is an arc line segment or a broken line segment.

Optionally, a point at which extension lines of the two adjacent sides of the first light emitting layer main body intersect is a first virtual vertex, a point at which extension lines of the two adjacent sides of the second light emitting layer main body 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.

Optionally, in an extending direction of any one of the two adjacent sides of the first light-emitting layer main body, a length of a portion of the side extending away from the first light-emitting layer main body accounts for 1/5 to 1/3 of a total size of the first light-emitting layer in the extending direction of the side.

Optionally, the broken line segment includes a plurality of straight line segments connected in sequence, wherein a point where two straight line segments connected to the light emitting layer main body intersect with each other in an extension line in a direction close to each other in the broken line segment is a virtual intersection point, and a connection line between two end points connected to the broken line segment and the light emitting layer main body and the virtual intersection point and the broken line segment form a virtual polygon together.

Optionally, the outlines of the first protruding structure and the second protruding structure are both arc line segments, the radius of curvature of the arc line segment formed by the outline of the first protruding structure is 1/5-1/3 of the side length of the first light-emitting layer, and the radius of curvature of the arc line segment formed by the outline of the second protruding structure is 1/5-1/3 of the side length of the second light-emitting layer; or the outlines of the first protruding structure and the second protruding structure are both broken line segments, the side length of a virtual polygon formed by the broken line segments formed by the outline of the first protruding structure is 1/5-1/3 of the side length of the first light-emitting layer, and the side length of a virtual polygon formed by the broken line segments formed by the outline of the second protruding structure is 1/5-1/3 of the side length of the second light-emitting layer.

Optionally, the contour of the first protruding structure and the contour of the second protruding structure are both arc segments, and the arc segments formed by the contour of the first protruding structure and the contour of the second protruding structure are 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 broken line segment formed by the contour of the first protruding structure and the broken line segment formed by the contour of the second protruding structure are symmetrical relative to a straight line perpendicular to the first direction.

Optionally, 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.

Optionally, the first light emitting layer and the second light emitting layer are in a quadrilateral, a hexagon or an octagon with a projected vertex angle structure, and an angle at a virtual vertex angle of the first vertex angle and an angle at a virtual vertex angle of the second vertex angle are respectively independent of each other at 45 degrees to 135 degrees.

Optionally, the plurality of first sub-pixels and the plurality of second sub-pixels are alternately arranged in a second direction perpendicular to the first direction, and the first light emitting layer and the second light emitting layer adjacent to each other in the second direction have opposite vertex angles in the second direction; in the second direction, a vertex angle of the first light-emitting layer, which is opposite to a vertex angle of the second light-emitting layer, is a third vertex angle, a vertex angle of the second light-emitting layer, which is opposite to the vertex angle of the first light-emitting layer, is a fourth vertex angle, the first light-emitting layer includes a third compensation portion protruding from the third vertex angle, the third compensation portion is integrally connected to the first light-emitting layer main body at the third vertex angle, the second light-emitting layer includes a fourth compensation portion protruding from the fourth vertex angle, the fourth compensation portion is integrally connected to the second light-emitting layer main body at the fourth vertex angle, and the third compensation portion and the fourth compensation portion are partially overlapped; and in the second direction, the orthographic projections of the third compensation part and the fourth compensation part on the substrate are positioned between the orthographic projections of the light-emitting areas of the first sub-pixel and the second sub-pixel on the substrate, and do not overlap with the orthographic projections of the light-emitting areas of the first sub-pixel and the second sub-pixel on the substrate.

Optionally, the display backplane further comprises a plurality of third sub-pixels surrounded by two first sub-pixels and two second sub-pixels formed as a 2 x 2 matrix; 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 region of the third sub-pixel.

Optionally, the outlines of the protruding structures at the top corners of the first light-emitting layer and the second light-emitting layer are both arc line segments, and the third light-emitting layer is a rounded rectangle, or the outlines of the protruding 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 rounded rectangle.

Optionally, the first light emitting layer and the second light emitting layer are both squares with protruding structures at four corners, the outlines of the protruding structures at four corners are both arcs, the area of the second light emitting layer is larger than that of the first light emitting layer, the third light emitting layer is a rounded rectangle, 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 a third aspect of the present invention, the present invention provides a display back plate. According to the utility model discloses an embodiment, this demonstration backplate includes: a substrate; the display panel comprises a substrate, a plurality of first sub-pixels and a plurality of second sub-pixels, wherein the plurality of first sub-pixels and the plurality of second sub-pixels are arranged on the substrate and are alternately arranged along a first direction, the first sub-pixels comprise first light-emitting layers, the second sub-pixels comprise second light-emitting layers, the first light-emitting layers and the second light-emitting layers are both polygonal, and the first light-emitting layers and the second light-emitting layers which are adjacent to each other in the first direction have opposite vertex angles in the first direction; a pixel defining layer having a plurality of openings configured to define light emitting areas of a plurality of first sub-pixels and a plurality of second sub-pixels; 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, which is opposite to the vertex angle of the second light-emitting layer, is a first vertex angle, the vertex angle of the second light-emitting layer, which is opposite to the vertex angle of the first light-emitting layer, is a second vertex angle, a part where two edges of at least one vertex angle of the first vertex angle and the second vertex angle extend and meet towards the vertex angle is formed into a straight line segment so that the vertex angle becomes a flat chamfer, and the straight line segment of the first vertex angle and the straight line segment of the second vertex angle are at least partially overlapped; the orthographic projection of the light emitting area of the first sub-pixel on the substrate falls into 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 into the orthographic projection of the second light emitting layer on the substrate, and in the first direction, the orthographic projection of the straight-line segment of the flat chamfer on the substrate is positioned between 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 and does not overlap with 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.

Optionally, 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 first light emitting layers and the second light emitting layers adjacent to each other in the second direction have opposite vertex angles in the second direction; in the second direction, of opposite vertex angles of the adjacent first light-emitting layer and the second light-emitting layer, a vertex angle of the first light-emitting layer, which is opposite to a vertex angle of the second light-emitting layer, is a third vertex angle, a vertex angle of the second light-emitting layer, which is opposite to the vertex angle of the first light-emitting layer, is a fourth vertex angle, a part where two edges of at least one vertex angle of the third vertex angle and the fourth vertex angle extend and meet towards the vertex angle of the vertex angle is formed into a straight line segment so that the vertex angle becomes a flat chamfer, and a straight line segment of the third vertex angle and a straight line segment of the fourth vertex angle are at least partially overlapped; and in the second direction, the orthographic projection of the straight-line segment of the flat chamfer on the substrate is positioned between the orthographic projections of the light-emitting areas of the first sub-pixel and the second sub-pixel on the substrate, and the straight-line segment of the flat chamfer does not overlap with the orthographic projections of the light-emitting areas of the first sub-pixel and the second sub-pixel on the substrate.

In a fourth aspect of the present invention, the present invention provides a mask assembly for preparing the aforementioned luminescent layer in the display back plate. According to the utility model discloses an embodiment, this mask version subassembly includes: a first mask having a plurality of first openings for forming a first light emitting layer; a second mask having a plurality of second openings for forming a second light emitting layer.

Optionally, the mask assembly further includes: a third mask having a plurality of third openings for forming a third light emitting layer.

Drawings

Fig. 1 is a schematic view of a partial planar structure of a display back plate according to an embodiment of the present invention.

Fig. 2 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 3 is a schematic sectional view taken along line a-a in fig. 1.

Fig. 4 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 5 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 6 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 7 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 8 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 9 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 10 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 11 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 12 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 13 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 14 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 15 is a schematic view of a partial planar structure of a display back plate according to another embodiment of the present invention.

Fig. 16 is a schematic view of a partial planar structure of a first mask according to an embodiment of the present invention.

Fig. 17 is a schematic view of a partial planar structure of a second mask according to an embodiment of the present invention.

Fig. 18 is a schematic view of a partial planar structure of a first mask and a second mask stacked and aligned according to an embodiment of the present invention.

Fig. 19 is a schematic view of a partial planar structure of a third mask according to an embodiment of the present invention.

Fig. 20 is a schematic view of a partial planar structure of a first mask, a second mask and a third mask stacked and aligned according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention are described in detail below. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.

In a first aspect of the present invention, the utility model provides a display back plate. According to an embodiment of the present invention, referring to fig. 1, 2 and 3, the display back plate includes: a substrate 100; a plurality of first sub-pixels and a plurality of second sub-pixels alternately arranged along a first direction, the first sub-pixels including first light emitting layers 10, the second sub-pixels including second light emitting layers 20, the first light emitting layers 10 and the second light emitting layers 20 being polygonal, and the first light emitting layers 10 and the second light emitting layers 20 adjacent to each other in the first direction having vertex angles in the first direction which are oppositely arranged; a pixel defining layer 200 having a plurality of openings 210 configured to define a plurality of light emitting regions 12 of a first sub-pixel and a plurality of light emitting regions 22 of a second sub-pixel; among the opposite vertex angles of the adjacent first light-emitting layer 10 and the second light-emitting layer 20, the vertex angle of the first light-emitting layer 10 opposite to the vertex angle of the second light-emitting layer 20 is a 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 a second vertex angle 24, a part where two edges of at least one vertex angle of the first vertex angle 14 and the second vertex angle 24 extend and meet to the vertex thereof is formed into an arc line segment 110 or a straight line segment 120 so that the vertex angle becomes a round chamfer or a flat chamfer, and a gap 1 is formed between the first vertex angle 14 and the second vertex angle 24; the orthographic projection of the light emitting region 12 of the first sub-pixel on the substrate 100 falls within the orthographic projection of the light emitting region 22 of the second sub-pixel on the substrate 100, the orthographic projection of the light emitting region 22 of the first sub-pixel on the substrate 100 falls within the orthographic projection of the light emitting region 20 of the second sub-pixel on the substrate 100, and in the first direction, the orthographic projection of the arc segment 110 or the straight segment 120 of the circular chamfer or the flat chamfer on the substrate 100 is positioned between the orthographic projection of the light emitting region 12 of the first sub-pixel and the orthographic projection of the light emitting region 22 of the second sub-pixel on the substrate 100, and has no overlap with the orthographic projection of the light emitting region 12 of the first sub-pixel and the light emitting region 22 of the second sub-pixel on the substrate 100. In the display back plate, the first top angle and the second top angle are set to be round chamfers or flat chamfers, gaps are reserved between the top angles of the adjacent first light-emitting layer and the second light-emitting layer, the color mixing risk of the top angles of the light-emitting layers can be effectively improved, and the display back plate is easy to prepare.

It can be understood that the substrate in the display backplane is not particularly limited, and may be a glass substrate, a polymer substrate, and the like, and the specific thickness, shape, size, and the like may be selected according to the actual use requirement, and are not described in detail herein.

It should be noted that, the first light emitting layer and the second light emitting layer herein may be organic layers, and have an electron injection layer, an electron transport layer, an organic light emitting layer, a hole transport layer, a hole injection layer, etc. which may be stacked, wherein the electron injection layer, the electron transport layer, the hole transport layer, and the hole injection layer may be an entire layer structure formed by an open mask, and taking the electron injection layer as an example, the electron injection layers in the plurality of first light emitting layers and the plurality of second light emitting layers are connected to each other to form a continuous entire layer structure, and the organic light emitting layer is a patterned layer structure corresponding to each sub-pixel, that is, a film layer formed by using FMM. In addition, the term "round chamfer" as used herein refers to a corner formed by rounding off a corner of a polygon, and the term "flat chamfer" refers to a corner formed by replacing a straight line segment with an arc segment of the round chamfer.

It is 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 area of the light emitting region of the display backplane, which is not favorable for achieving high PPI (pixel density) and display quality, the size of the gap 1 may be greater than 0 and equal to or less than 0.41X, where X is the distance between two adjacent openings in the pixel defining layer, in order to balance the above two factors. In the size range, the color mixing risk can be effectively reduced, the area ratio of a light-emitting area can be ensured as much as possible, and the display quality is improved.

According to the utility model discloses in the demonstration backplate, when guaranteeing to avoid the colour mixture risk, can further come make full use of through the different subpixels of reasonable arranging and show the area of backplate to make the area of luminous zone occupy than bigger, realize higher PPI and better display effect.

According to some embodiments of the present invention, the two end-point connection 112 (refer to fig. 1) of the arc segment 110 or the straight segment 120 (refer to fig. 2) may extend in a second direction, which is perpendicular to the first direction.

According to other embodiments of the present invention, the point where the extension lines of the two sides of the round chamfer or the flat chamfer to the vertex direction intersect is a virtual vertex of the vertex angle; referring to fig. 1 and 2, virtual vertex 141 of first vertex 14 and virtual vertex 241 of second vertex 24 lie on a line a-a or e-e parallel to the first direction.

According to some embodiments of the present invention, referring to fig. 4, the virtual vertex 141 of the first vertex angle 14 and the virtual vertex 241 of the second vertex angle 24 are staggered in the first direction, that is, the virtual vertex 141 of the first vertex angle 14 is located on one side of the virtual vertex 241 of the second vertex angle 24 away from the first sub-pixel, and the virtual vertex 241 of the second vertex angle 24 is located on one side of the virtual vertex 141 of the first vertex angle 14 away from the second sub-pixel. According to further embodiments of the present invention, referring to fig. 5, an orthographic projection of the virtual vertex 141 of the first vertex 14 on the substrate is located within an orthographic projection of the second luminescent layer 20 on the substrate, and an orthographic projection of the virtual vertex 241 of the second vertex 24 on the substrate is located within an orthographic projection of the first luminescent layer 10 on the substrate. Thus, the gap 1 between the first light-emitting layer and the second light-emitting layer adjacent to each other in the first direction is small, the area ratio of the light-emitting region is large, and a higher pixel density can be achieved, and the display effect is improved.

According to an embodiment of the present invention, the shape of the first light emitting layer and the second light emitting layer may be a quadrangle, a hexagon, or an octagon, and the angle α 1 at the virtual vertex of the first vertex angle of the first light emitting layer and the angle α 2 at the virtual vertex of the second vertex angle of the second light emitting layer may be 45 degrees to 135 degrees, specifically 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees, and the like, independently.

According to an embodiment of the present invention, referring to fig. 1, the first vertex angle 14 and the second vertex angle 24 both have the arc segment 110, and the arc segment of the first vertex angle and the arc segment of the second vertex angle are symmetrical with respect to a straight line c-c perpendicular to the first direction; alternatively, referring to fig. 2, each of the first and

second corners

14 and 24 has the straight line segment 120, and the straight line segments of the first and second corners are symmetrical with respect to a line d-d perpendicular to the first direction.

According to an embodiment of the present invention, referring to fig. 1 and 2, 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 light emitting layer 10 and the second light emitting layer 20 adjacent to each other in the second direction have opposite vertex angles in the second direction; in the second direction, of the opposite vertex angles of the first light-emitting layer 10 and the second light-emitting layer 20 which are adjacent to each other, the vertex angle of the first light-emitting layer 10 which is opposite to the vertex angle of the second light-emitting layer 20 is a third vertex angle 16, the vertex angle of the second light-emitting layer 20 which is opposite to the vertex angle of the first light-emitting layer 10 is a fourth vertex angle 26, a portion where two edges of at least one of the third vertex angle 16 and the fourth vertex angle 26 extend and meet towards the vertex angle of the vertex angle is formed into an arc line segment 130 or a straight line segment 140 so that the vertex angle becomes a round chamfer or a flat chamfer, and a gap 2 is formed between the opposite vertex angles of the first light-emitting layer 10 and the second light-emitting layer 20 which are adjacent to the third vertex angle 16 and the fourth vertex angle 26; and in the second direction, the orthographic projection of the circular chamfer or the flat chamfer of the arc line segment 130 or the straight line segment 140 on the substrate is positioned between the orthographic projection of the light-emitting region 12 of the first sub-pixel and the orthographic projection of the light-emitting region 22 of the second sub-pixel on the substrate, and the circular chamfer or the flat chamfer of the arc line segment 130 or the straight line segment 140 on the substrate is not overlapped with the orthographic projection of the light-emitting region 12 of the first sub-pixel and the orthographic projection of the light-emitting region 22 of the. Thereby, also 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 invention, the third vertex angle and the fourth vertex angle may also be set according to the above-mentioned manner of the first vertex angle and the second vertex angle, specifically, in some embodiments, the two end point connecting line 132 (refer to fig. 1) of the arc segment 130 or the straight line segment 140 (refer to fig. 2) may extend in the first direction.

In other embodiments, a point at which extension lines of two sides of the round chamfer or the flat chamfer at the third vertex angle and the fourth vertex angle to the vertex direction of the round chamfer or the flat chamfer intersect is a virtual vertex of the vertex angle; referring to fig. 1 and 2, virtual vertex 161 of third vertex 16 and virtual vertex 261 of fourth vertex 26 lie on a line b-b or f-f parallel to the second direction.

According to some embodiments of the present invention, referring to fig. 4, the virtual vertex 161 of the third vertex angle 16 and the virtual vertex 261 of the fourth vertex angle 26 are staggered in the third direction, i.e. the virtual vertex 161 of the third vertex angle 16 is located on the side of the virtual vertex 261 of the fourth vertex angle 26 away from the first sub-pixel, and the virtual vertex 261 of the fourth vertex angle 26 is located on the side of the virtual vertex 161 of the third vertex angle 16 away from the second sub-pixel. According to further embodiments of the present invention, referring to fig. 5, an orthographic projection of the virtual vertex 161 of the third vertex angle 16 on the substrate is located within an orthographic projection of the second luminescent layer 20 on the substrate, and an orthographic projection of the virtual vertex 261 of the fourth vertex angle 26 on the substrate is located within an orthographic projection of the first luminescent layer 10 on the substrate. Thus, in the second direction, the gap between the first light-emitting layer and the second light-emitting layer adjacent to each other is small, the area ratio of the light-emitting region is large, and the display effect is good.

According to an embodiment of the present invention, referring to fig. 1, the third vertex angle 16 and the fourth vertex angle 26 both have the arc segment 130, and the arc segment of the third vertex angle and the arc segment of the fourth vertex angle are symmetrical with respect to a straight line g-g perpendicular to the second direction; alternatively, referring to fig. 2, each of the third corner angle 16 and the fourth corner angle 26 has the straight line segment 140, and the straight line segments of the third corner angle and the fourth corner angle are symmetrical with respect to a line h-h perpendicular to the second direction.

According to an embodiment of the present invention, referring to fig. 6, the display backplane further comprises a plurality of third sub-pixels, said third sub-pixels being surrounded by two of said first sub-pixels and two of said second sub-pixels formed as a 2 x 2 matrix; the third sub-pixel comprises a third light-emitting layer 30 and the opening of the pixel defining layer is configured to define a light-emitting area 32 of the third sub-pixel.

According to an embodiment of the present invention, the centers of the light emitting areas of the two first sub-pixels and the two second sub-pixels forming the 2 x 2 matrix are located at four vertices of a virtual rectangle 40, respectively, and the light emitting area 32 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 invention, referring to fig. 6, the first light-emitting layer 10, the second light-emitting layer 20, and the third light-emitting layer 30 are both rounded rectangles (a pattern formed after rounding four corners of a rectangle), or, referring to fig. 7, the first light-emitting layer 10 and the second light-emitting layer 20 are both rectangles and four respective corners are flat chamfers, and the third light-emitting layer 30 is a rounded rectangle. It should be noted that, in order to ensure the process yield and avoid that the organic light emitting layer is not formed in the light emitting region and cannot emit light due to the misalignment (Margin), the light emitting layer is generally expanded according to a certain ratio according to the corresponding light emitting region, and therefore, the light emitting region 12 of the first sub-pixel, the light emitting region 22 of the second sub-pixel, and the light emitting region 32 of the third sub-pixel have shapes and contours similar to those of 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 invention, referring to fig. 8, for the two first sub-pixels and the two second sub-pixels forming the 2 × 2 matrix and the third sub-pixel enclosed therein, the first light emitting layer 10 and the second light emitting layer 20 have a gap at respective vertex angles between a boundary of the third light emitting layer 30 and the first light emitting layer 10 and the second light emitting layer 20 meet the boundary of the third light emitting layer at a non-vertex angle of one edge.

According to the utility model discloses an embodiment, first sub-pixel is red sub-pixel, the second sub-pixel is blue sub-pixel, the third sub-pixel is green sub-pixel. It should be noted that, in the actual use process, the light emitting efficiency or luminance of the blue organic light emitting layer is lower than that of the red 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 are larger than those of the light emitting layer and the light emitting region of the red and green sub-pixels, and a better color display effect is achieved.

In some embodiments, referring to fig. 6, the first light emitting layer 10 and the second light emitting layer 20 are both rounded squares, 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 rounded rectangle, 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 the side close to the first 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 two adjacent third light emitting layers are inclined in the opposite direction with respect to the second direction and are symmetrical with respect to a straight line i-i parallel to the second direction. Therefore, the area of the light emitting region is larger, the area of the display back plate can be more fully utilized, and the display quality is improved.

In another aspect of the present invention, the utility model provides a display back plate. According to an embodiment of the present invention, referring to fig. 9 and 10, the display back plate includes: a substrate 100; a plurality of first sub-pixels and a plurality of second sub-pixels alternately arranged along a first direction disposed on the substrate 100, the first sub-pixels including a first light emitting layer 10, the second sub-pixels including a second light emitting layer 20, the first light emitting layer 10 and the second light emitting layer 20 adjacent in the first direction having a vertex angle oppositely disposed in the first direction, the vertex angle of the first light emitting layer 10 opposite to the vertex angle of the second light emitting layer 20 being a 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 being a second vertex angle 24, the first light emitting layer 10 including a first light emitting layer main body 11 and a first compensation portion 13 protruding at the first vertex angle 14, the first compensation portion 13 integrally connected to the first light emitting layer main body 11 at the first vertex angle, the second light emitting layer 20 including a second light emitting layer main body 21 and a second compensation portion 23 protruding at the second vertex angle, the second compensation part 23 is integrally connected with the second light emitting layer main body 21 at a second top corner, and the first compensation part 13 and the second compensation part 23 are partially overlapped; a pixel defining layer 200 having a plurality of openings 210 configured to define light emitting areas of a plurality of the first sub-pixels and a plurality of the second sub-pixels; wherein an orthogonal projection of the light emitting region 12 of the first sub-pixel on the substrate 100 falls within an orthogonal projection of the first light emitting layer 10 on the substrate 100, an orthogonal projection of the light emitting region 22 of the second sub-pixel on the substrate 100 falls within an orthogonal projection of the second light emitting layer 20 on the substrate 100, and in the first direction, the orthogonal projections of the first compensation part 13 and the second compensation part 23 on the substrate 100 are located between the orthogonal projections of the light emitting region 12 of the first sub-pixel and the light emitting region 22 of the second sub-pixel on the substrate 100, and do not overlap with the orthogonal projections of the light emitting region 12 of the first sub-pixel and the light emitting region 22 of the second sub-pixel on the substrate. In the display substrate, the adjacent first compensation parts 13 and the second compensation parts 23 are partially overlapped, so that corresponding positions can be etched by liquid medicine in the manufacturing of a mask used for forming a light emitting layer, the condition that the Margin is reduced due to the fact that short straight lines cannot be etched and formed is avoided, the Margin at the corresponding positions is guaranteed, and the color shortage risk is reduced.

It should be noted that, when a light emitting layer is formed by using a mask for evaporation, in order to ensure accurate alignment between an opening of the mask and an opening of a Pixel Definition Layer (PDL), a certain alignment offset (i.e., a Margin, a distance between an outline of the opening of the mask and an outline of the opening of the PDL) is usually reserved around the opening of the mask, that is, the opening of the mask is slightly larger than the opening of the PDL, or the opening of the mask is enlarged according to the PDL opening by a certain ratio.

According to some embodiments of the present invention, the overlapping area of the adjacent first compensation portion 13 and the second compensation portion 23 may be less than or equal to 0.0858X²And X is PDL Gap. Therefore, the Margin can be ensured to the greatest extent, the aperture opening ratio is improved, and the color mixing risk is low.

According to the embodiment of the present invention, referring to fig. 9 and 10, the first compensation portion 13 includes a first protruding structure 15 formed by the portions of two adjacent sides of the first light emitting layer main body 11 close to the first vertex angle 14 respectively extending in a direction away from the first light emitting layer main body 11 and meeting at the first vertex angle 14, and the second compensation portion 23 includes a second protruding structure 25 formed by the portions of two adjacent sides of the second light emitting layer main body 21 close to the second vertex angle 24 respectively extending in a direction away from the second light emitting layer main body 21 and meeting at the second vertex angle 24; the outline 151 of the first protruding structure connecting the two adjacent sides of the first light-emitting layer 10 is an arc line segment or a broken line segment; the outline 251 of the second protrusion structure connecting the two adjacent sides of the second light emitting layer 20 is an arc line segment or a broken line segment.

In some embodiments, an arc line segment formed by the contour 151 of the first protruding structure and the contour 251 of the second protruding structure may be an arc, and a broken line segment formed by the contour 151 of the first protruding structure and the contour 251 of the second protruding structure may be a part of a polygonal contour.

In some embodiments, referring to fig. 9, the contour 151 of the first protrusion structure and the contour 251 of the second protrusion structure are arc line segments, where the contour of the first light emitting layer body 11 and the contour 151 of the first protrusion structure may be smoothly connected, and the contour of the second light emitting layer body 21 and the contour 251 of the second protrusion structure may be smoothly connected. In other embodiments, referring to fig. 10, the outline 151 of the first protrusion structure and the outline 251 of the second protrusion structure are broken line segments, and at this time, the two

sides

152 and 153 of the first protrusion structure 15 forming the vertex angle are respectively substantially parallel to the two

sides

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

sides

252 and 253 of the second protrusion structure 25 forming the vertex angle are respectively substantially parallel to the two

sides

211 and 212 of the second light emitting layer main body 21.

According to an embodiment of the present invention, referring to fig. 9 and 10, a point where the extension lines of the two adjacent sides of the first light emitting layer main body 11 intersect is a first virtual vertex 141, a point where the extension lines of the two adjacent sides of the second light emitting layer main body 21 intersect is a second virtual vertex 241, the first virtual vertex 141 is located in the first compensation portion 13, and the second virtual vertex 241 is located in the second compensation portion 23.

According to an embodiment of the present invention, referring to fig. 10, the broken line segment includes a plurality of straightways 254 connected in sequence, wherein, the point where the two straightways connected with the light emitting body in the broken line segment intersect to the extension line of the direction close to each other is a virtual intersection point 51, and the two end points 52, 53 connected with the light emitting body in the broken line segment and the connecting line between the virtual intersection points 51 and the broken line segment form a virtual polygon 50 together. It should be noted that the broken line segment is a theoretical outline, and in actual manufacturing, each corner position will present a certain arc-shaped angle due to process reasons, as long as the approximate outline presents a broken line shape.

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

According to an embodiment of the present invention, referring to fig. 9, the outlines of the first protruding structure 15 and the second protruding structure 25 are arc segments, the radius of curvature R1 of the arc segment formed by the outline of the first protruding structure 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 outline of the second protruding structure is 1/5 to 1/3 of the side length L6 of the second light emitting layer 20; or, referring to fig. 10, the outlines of the first bump structures and the second bump structures are both broken line segments, the side length L7 of a virtual polygon formed by the broken line segments formed by the outlines of the first bump structures is 1/5 to 1/3 of the side length L5 of the first light-emitting layer, and the side length L8 of the virtual polygon formed by the broken line segments formed by the outlines of the second bump structures is 1/5 to 1/3 of the side length of the second light-emitting layer L6. Therefore, the aperture opening ratio is improved on the premise that the Margin can be well guaranteed, and meanwhile, the color mixing risk is low.

According to an embodiment of the present invention, referring to fig. 9, the contour 151 of the first protruding structure and the contour 251 of the second protruding structure are both arc segments, and the arc segment formed by the contour 151 of the first protruding structure and the arc segment formed by the contour 251 of the second protruding structure are symmetrical to a straight line j-j perpendicular to the first direction; alternatively, referring to fig. 10, the outline 151 of the first protrusion structure and the outline 251 of the second protrusion structure are both broken line segments, and the broken line segment formed by the outline 151 of the first protrusion structure and the broken line segment formed by the outline 251 of the second protrusion structure are symmetrical with respect to a straight line k-k perpendicular to the first direction.

According to an embodiment of the present invention, referring to fig. 9 and 10, the virtual vertex 141 of the first vertex angle and the virtual vertex 241 of the second vertex angle are located on a straight line l-l or m-m parallel to the first direction.

According to the embodiment of the present invention, referring to fig. 11, the orthographic projection of the virtual vertex 141 of the first vertex angle on the substrate is located in the orthographic projection of the substrate by the second light emitting layer 20, and the orthographic projection of the virtual vertex 241 of the second vertex angle on the substrate is located in the orthographic projection of the substrate by the first light emitting layer 10. In some embodiments, referring to fig. 12, the virtual vertex 141 of the first vertex and the virtual vertex 241 of the second vertex are staggered in the first direction, that is, the virtual vertex 141 of the first vertex is located on a side of the virtual vertex 241 of the second vertex away from the first sub-pixel, and the virtual vertex 241 of the second vertex is located on a side of the virtual vertex 141 of the first vertex away from the second sub-pixel.

According to an embodiment of the present invention, the shape of the first light emitting layer 10 and the second light emitting layer 20 is a quadrangle, a hexagon or an octagon with a convex structure at the vertex angle, and the angle α 1 at the first virtual vertex 141 and the angle α 2 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 the like.

According to an embodiment of the present invention, referring to fig. 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 the first light emitting layer 10 and the second light emitting layer 20 adjacent in the second direction have opposite vertex angles in the second direction; wherein, in the second direction, a vertex angle of the first light emitting layer 10 opposite to a vertex angle of the second light emitting layer 20 is a third vertex angle 16, a vertex angle of the second light emitting layer opposite to the vertex angle of the first light emitting layer is a fourth vertex angle 26, the first light emitting layer 10 includes a third compensation portion 17 protruding at the third vertex angle, the third compensation portion 17 is integrally connected with the first light emitting layer main body 11 at the third vertex angle, the second light emitting layer 20 includes a fourth compensation portion 27 protruding at the fourth vertex angle, the fourth compensation portion 27 is integrally connected with the second light emitting layer main body 21 at the fourth vertex angle, and the third compensation portion 17 and the fourth compensation portion 27 are partially overlapped; and in the second direction, the orthographic projections of the third compensation part 17 and the fourth compensation part 27 on the substrate are positioned between the orthographic projections of the light-emitting region 12 of the first sub-pixel and the light-emitting region 22 of the second sub-pixel on the substrate, and do not overlap with the orthographic projections of the light-emitting region 12 of the first sub-pixel and the light-emitting region 22 of the second sub-pixel on the substrate.

According to the utility model discloses an embodiment, third apex angle, fourth apex angle can be with preceding first apex angle and second apex angle the same, all characteristics and the advantage that are applicable to first apex angle promptly all are applicable to the third apex angle, and all characteristics and the advantage that are applicable to the second apex angle all are applicable to the fourth apex angle, no longer give unnecessary details here one by one.

According to an embodiment of the present invention, referring to fig. 13, the display backplane further comprises a plurality of third sub-pixels, said third sub-pixels being surrounded by two first sub-pixels and two second sub-pixels formed as a 2 x 2 matrix; the third sub-pixel comprises a third light-emitting layer 30 and the opening of the pixel defining layer is configured to define a light-emitting area 32 of the third sub-pixel.

According to an embodiment of the present invention, referring to fig. 13, the centers of the light emitting areas 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 40, and 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 the embodiment of the present invention, referring to fig. 13, the first luminescent layer and the outline of the protruding structure of the apex angle of the second luminescent layer are arc segments, and the third luminescent layer is a rounded rectangle, or, referring to fig. 14, the first luminescent layer and the outline of the protruding structure of the apex angle of the second luminescent layer are broken segments, and the third luminescent layer is a rounded rectangle.

In a third aspect of the present invention, the present invention provides a display back plate. According to the utility model discloses an embodiment, referring to fig. 15, this demonstration backplate includes: a substrate; a plurality of first sub-pixels and a plurality of second sub-pixels alternately arranged along a first direction, the first sub-pixels including first light emitting layers 10, the second sub-pixels including second light emitting layers 20, the first light emitting layers 10 and the second light emitting layers 20 being polygonal, and the first light emitting layers 10 and the second light emitting layers 20 adjacent to each other in the first direction having vertex angles in the first direction which are oppositely arranged; a pixel defining layer having a plurality of openings configured to define light emitting areas of a plurality of first sub-pixels and a plurality of second sub-pixels; among the opposite vertex angles of the adjacent first light-emitting layer 10 and the second light-emitting layer 20, the vertex angle of the first light-emitting layer 10 opposite to the vertex angle of the second light-emitting layer 20 is a 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 a second vertex angle 24, a part where two edges of the first vertex angle 14 and the second vertex angle 24 extend and meet towards the vertex thereof is formed into a straight line segment 120 so that the vertex angles become flat chamfers, and the straight line segment of the first vertex angle and the straight line segment of the second vertex angle are at least partially overlapped; the orthographic projection of the light emitting region 12 of the first sub-pixel on the substrate falls within the orthographic projection of the light emitting region 22 of the second sub-pixel on the substrate, and the orthographic projection of the light emitting region 12 of the second sub-pixel on the substrate falls within the orthographic projection of the light emitting region 20 of the second sub-pixel on the substrate, and in the first direction, the orthographic projection of the straight line segment 120 of the flat chamfer on the substrate is positioned between the orthographic projections of the light emitting region 12 of the first sub-pixel and the light emitting region 22 of the second sub-pixel on the substrate, and has no overlap with the orthographic projections of the light emitting region 12 of the first sub-pixel and the light emitting region 22 of the second sub-pixel on the substrate. In the display back plate, the boundaries of the adjacent first vertex angle and the second vertex angle are overlapped, so that the upper, lower, left and right alignment offsets (Margin) of an opening of a mask plate in the preparation process are the same, particularly the Margin at the vertex angle is the same, the pixel area can be fully utilized, and the aperture opening ratio is improved.

According to the embodiment of the present invention, the length L of the overlapped portion of the straight line segment of the first vertex angle and the straight line segment of the second vertex angle may be greater than 10 micrometers and less than or equal to 0.41X, where X is the distance between two adjacent sub-pixel openings in the pixel definition layer (or referred to as PDL Gap). Therefore, the opening of the mask for forming the luminous layer is easy to process, the processing precision and the processing accuracy are high, and the problem that the processing precision of a straight line is poor and the straight line cannot be formed or the deformation is serious due to the limitation of a processing technology can be avoided.

According to the embodiment of the present invention, the point where the extension lines of the two sides of the flat chamfer to the vertex direction intersect is the virtual vertex of the vertex angle; virtual vertex 141 of the first corner and virtual vertex 241 of the second corner lie on a line n-n parallel to the first direction.

According to the embodiment of the present invention, the orthographic projection of the virtual vertex 141 of the first vertex angle on the substrate is located in the orthographic projection of the substrate by the second light emitting layer 20, and the orthographic projection of the virtual vertex 241 of the second vertex angle on the substrate is located in the orthographic projection of the substrate by the first light emitting layer 10.

According to an embodiment of the present invention, the shape of the first light emitting layer and the second light emitting layer is a quadrangle, a hexagon or an octagon, and the angle α 1 of the virtual vertex of the first vertex angle and the angle α 2 of the virtual vertex of the second vertex angle are each independently 45 degrees to 135 degrees, such as 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees, and the like.

According to an embodiment of the present invention, 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 light emitting layer 10 and the second light emitting layer 20 adjacent to each other in the second direction have opposite vertex angles in the second direction; in the second direction, of opposite vertex angles of the adjacent first light-emitting layer 10 and the second light-emitting layer 20, a vertex angle of the first light-emitting layer 10 opposite to a vertex angle of the second light-emitting layer 20 is a third vertex angle 16, a vertex angle of the second light-emitting layer 20 opposite to the vertex angle of the first light-emitting layer 10 is a fourth vertex angle 26, a part where two sides of the third vertex angle 16 and the fourth vertex angle 26 extend and meet towards the vertex angle of the vertex angle is formed as a line segment 140 so that the vertex angle becomes a flat chamfer, and a straight segment of the third vertex angle 16 and a straight segment of the fourth vertex angle 26 are at least partially overlapped; and in the second direction, the orthographic projection of the straight-line segment 140 of the flat chamfer on the substrate is positioned between the orthographic projections of the light-emitting areas 12 of the first sub-pixels and the light-emitting areas 22 of the second sub-pixels on the substrate, and the straight-line segment does not overlap with the orthographic projection of the light-emitting areas 12 of the first sub-pixels and the orthographic projection of the light-emitting areas 22 of the second sub-pixels on the substrate. Thereby, also 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 a fourth aspect of the present invention, the present invention provides a mask assembly for preparing the aforementioned luminescent layer in the display back plate. According to an embodiment of the present invention, referring to fig. 16, 17 and 18, the mask assembly includes: a first reticle 300 having a plurality of first openings 310 for forming a first light emitting layer; a second reticle 400 having a plurality of second openings 410 for forming a second light emitting layer. Therefore, the mask can be used for preparing the display back plate, and the light emitting layer in the obtained display back plate can obviously reduce the risk of color mixing.

It can be understood that, when the light emitting layer is formed by evaporation, the mask is disposed above the substrate in an aligned manner, and the material forming the light emitting layer is evaporated and then deposited on the substrate through the opening in the mask, so that the shape of the first opening can be substantially the same as the shape of the first light emitting layer, and the characteristics suitable for the first light emitting layer are also suitable for the first opening. For example, the vertex angle of the first opening has an arc segment, a straight segment or a compensation portion corresponding to the first light emitting layer, which is not described herein any more, and correspondingly, the shape of the second opening may be substantially the same as the shape of the second light emitting layer, and the characteristics suitable for the second light emitting layer are also suitable for the second opening.

According to an embodiment of the present invention, referring to fig. 19 and 20, the mask assembly may further include a third mask 500, the third mask 500 having a plurality of third openings 510 for forming a third light emitting layer. The shape of the third opening may be substantially the same as the shape of the third light emitting layer, similarly to the first opening and the second opening, and the feature applicable to the third light emitting layer is 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 corner due to the limitation of the etching process. Furthermore, the shape of the luminescent layer formed by evaporation of the mask is approximately consistent with the shape of the opening of the mask, but the curvature of the arc at the corner position is usually not smaller than the curvature of the arc at the corresponding corner of the opening of the mask. In addition, because the in-process of coating by vaporization, the luminescent material of coating by vaporization has diffusion of certain degree to and because the distance from the evaporation source is different, the marginal position department thickness of the luminescent layer that forms can slightly be less than central point department thickness, and the scope that the luminescent layer outside diffusion formed also can slightly be greater than the size of the opening of corresponding mask version, in the above embodiment, to the description of luminescent layer, be based on shape and size under the ideal condition, it is unanimous basically with the mask version opening, the luminescent layer that the deviation that leads to because of the technology reason on this basis formed is also in the utility model discloses an in.

In a fifth aspect of the present invention, the present invention provides a display device. According to the utility model discloses an embodiment, this display device includes preceding demonstration backplate. The display device has all the features and advantages of the display back plate, which are not described in detail herein.

According to the embodiment of the present invention, the specific type of the display device is not particularly limited, and may be any known display device, for example, including but not limited to a mobile phone, a tablet computer, a game machine, a television, a wearable device, and the like. It can be understood that, in addition to the flexible display device described above, the display device may also include structures and components necessary for a conventional display device, and for example, a mobile phone may further include a touch screen, a fingerprint identification module, a camera module, a sound system, a main board, a storage, a housing, and the like, which are not described in detail herein.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A display backplane, comprising:

a substrate;

the display panel comprises a substrate, a plurality of first sub-pixels and a plurality of second sub-pixels, wherein the plurality of first sub-pixels and the plurality of second sub-pixels are arranged on the substrate and are alternately arranged along a first direction, the first sub-pixels comprise first light-emitting layers, the second sub-pixels comprise second light-emitting layers, the first light-emitting layers and the second light-emitting layers are both polygonal, and the first light-emitting layers and the second light-emitting layers which are adjacent to each other in the first direction have opposite vertex angles in the first direction;

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

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, which is opposite to the vertex angle of the second light-emitting layer, is a first vertex angle, the vertex angle of the second light-emitting layer, which is opposite to the vertex angle of the first light-emitting layer, is a second vertex angle, and a part where two edges of at least one vertex angle of the first vertex angle and the second vertex angle extend and meet towards the vertex angle is formed into an arc line segment or a straight line segment so that the vertex angle becomes a round chamfer or a flat chamfer, and a gap is formed between the first vertex angle and the second vertex angle;

the orthographic projection of the light emitting area of the first sub-pixel on the substrate falls into 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 into the orthographic projection of the second light emitting layer on the substrate, in a first direction, the orthographic projection of the arc line segment or the straight line segment of the round chamfer or the flat chamfer on the substrate is positioned between the orthographic projection of the light emitting area of the first sub-pixel and the orthographic projection of the light emitting area of the second sub-pixel on the substrate, and the orthographic projection of the light emitting area of the first sub-pixel and the orthographic projection of the light emitting area of the second sub-pixel on the substrate are not overlapped.

2. The display backplane of claim 1, wherein a connection of two ends of the arc segment or the straight segment extends in a second direction, the second direction being perpendicular to the first direction.

3. The display backplane according to claim 1, wherein the point where the extension lines of the two sides of the round chamfer or the flat chamfer to the vertex direction thereof intersect is a virtual vertex of the vertex angle;

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.

4. A display backplane according to claim 3, wherein an orthographic projection of a virtual vertex of the first vertex on the substrate is within an orthographic projection of the second luminescent layer on the substrate, and wherein an orthographic projection of a virtual vertex of the second vertex on the substrate is within an orthographic projection of the first luminescent layer on the substrate.

5. A display backplane according to claim 3, wherein the first and second light emitting layers are quadrilateral, hexagonal or octagonal in shape, and wherein the angle at the virtual vertex of the opposing vertex angles of the first and second light emitting layers is 45-135 degrees.

6. The display backplane of claim 1, wherein the first vertex angle and the second vertex angle each have the arc segment, and wherein the arc segment of the first vertex angle and the arc segment of the second vertex angle are symmetrical with respect to a line perpendicular to the first direction; alternatively, the first and second electrodes may be,

the first vertex angle and the second vertex angle are both provided with the straight line segments, and the straight line segments of the first vertex angle and the second vertex angle are symmetrical relative to a straight line perpendicular to the first direction.

7. A display backplane according to claim 2, wherein a plurality of the first sub-pixels and a plurality of the second sub-pixels are alternately arranged in the second direction, and the first light emitting layer and the second light emitting layer adjacent to each other in the second direction have oppositely arranged apex angles in the second direction;

in the second direction, of opposite vertex angles of the adjacent first light-emitting layer and the second light-emitting layer, a vertex angle of the first light-emitting layer, which is opposite to a vertex angle of the second light-emitting layer, is a third vertex angle, a vertex angle of the second light-emitting layer, which is opposite to the vertex angle of the first light-emitting layer, is a fourth vertex angle, and a part where two edges of at least one of the third vertex angle and the fourth vertex angle extend and meet towards the vertex angle of the vertex angle is formed into an arc line segment or a straight line segment so that the vertex angle becomes a round chamfer or a flat chamfer, and a gap is formed between the third vertex angle and the fourth vertex angle;

in the second direction, the orthographic projection of the arc line segment or straight line segment of the round chamfer or the flat chamfer on the substrate is positioned between the orthographic projection of the light emitting area of the first sub-pixel and the orthographic projection of the light emitting area of the second sub-pixel on the substrate, and the orthographic projection of the light emitting area of the first sub-pixel and the orthographic projection of the light emitting area of the second sub-pixel on the substrate are not overlapped.

8. The display backplane of claim 7, further comprising a plurality of third sub-pixels surrounded by two of the first sub-pixels and two of the second sub-pixels formed in a 2 x 2 matrix;

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 region of the third sub-pixel.

9. The display backplane of claim 8, wherein the centers of the light emitting areas of the two first sub-pixels and the two second sub-pixels forming the 2 x 2 matrix are located at four vertices of an imaginary rectangle, and 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 imaginary rectangle.

10. The display backplane of claim 8, wherein the first, second, and third light-emitting layers are rounded rectangles, or wherein the first and second light-emitting layers are rectangles with four corners of each rectangle being straight corners and the third light-emitting layer is rounded rectangles.

11. The display backplane of claim 10, wherein for the two first and two second sub-pixels and the enclosed third sub-pixel forming a 2 x 2 matrix, the first and second light emitting layers each have a gap at a respective vertex angle from a boundary of the third light emitting layer, and the first and second light emitting layers meet the boundary of the third light emitting layer at a non-vertex angle of one edge.

12. The display backplane of claim 10, 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.

13. The display backplane of claim 12, wherein the first and second light-emitting layers are rounded squares, the second light-emitting layer has a larger area than the first light-emitting layer, the third light-emitting layer has a rounded rectangle, the long side of the rounded rectangle is the side of the rounded rectangle close to the second light-emitting layer, and the short side of the rounded rectangle is the side of the rounded rectangle close to the first light-emitting layer.

14. A display backplane, comprising:

a substrate;

a plurality of first sub-pixels and a plurality of second sub-pixels alternately arranged along a first direction on the substrate, the first sub-pixels including a first light emitting layer, the second sub-pixels including a second light emitting layer, the first light emitting layer and the second light emitting layer adjacent to each other in the first direction having vertex angles oppositely arranged in the first direction, the vertex angle of the first light emitting layer opposite to the vertex angle of the second light emitting layer being a first vertex angle, the vertex angle of the second light emitting layer opposite to the vertex angle of the first light emitting layer being a second vertex angle, the first light emitting layer including a first light emitting layer main body and a first compensation portion protruding at the first vertex angle, the first compensation portion being integrally connected to the first light emitting layer main body at the first vertex angle, the second light emitting layer including a second light emitting layer main body and a second compensation portion protruding at the second vertex angle, the second compensation part is integrally connected with the second luminous layer main body at a second top angle, and the first compensation part and the second compensation part are partially overlapped;

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

wherein an orthographic projection of the light emitting area of the first sub-pixel on the substrate falls within an orthographic projection of the first light emitting layer on the substrate, an orthographic projection of the light emitting area of the second sub-pixel on the substrate falls within an orthographic projection of the second light emitting layer on the substrate, and in the first direction, the orthographic projections of the first compensation portion and the second compensation portion on the substrate are located between 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, and do not overlap with 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.

15. The display backplane according to claim 14, wherein the first compensation portion comprises a first protruding structure formed by two adjacent sides of the first light emitting layer main body extending toward a direction away from the first light emitting layer main body and meeting at a first vertex angle, and the second compensation portion comprises a second protruding structure formed by two adjacent sides of the second light emitting layer main body extending toward a direction away from the second light emitting layer main body and meeting at a second vertex angle;

the outline of the first protruding structure connecting the two adjacent edges of the first light-emitting layer is an arc line segment or a broken line segment;

the outline of the second protruding structure connecting the two adjacent sides of the second light-emitting layer is an arc line segment or a broken line segment.

16. The display backplane according to claim 15, wherein a point at which extension lines of the two adjacent sides of the first light-emitting layer main body intersect is a first virtual apex, and a point at which extension lines of the two adjacent sides of the second light-emitting layer main body intersect is a second virtual apex, the first virtual apex being located in the first compensation section, and the second virtual apex being located in the second compensation section.

17. The display back sheet according to claim 15, wherein the length of a portion of the edge extending away from the first light-emitting layer main body in the extending direction of any one of the two adjacent edges of the first light-emitting layer main body accounts for 1/5 to 1/3 of the total dimension of the first light-emitting layer in the extending direction of the edge.

18. The display backplane of claim 15, wherein the broken line segment comprises a plurality of straight line segments connected in sequence, wherein a point of the broken line segment where two extending lines of the straight line segments connected to the light emitting layer main body in a direction approaching each other intersect is a virtual intersection point, and a connecting line between two end points of the broken line segment connected to the light emitting layer main body and the virtual intersection point and the broken line segment together form a virtual polygon.

19. The display backplane according to claim 18, wherein the first and second convex structures have an outline of an arc segment, the arc segment having a radius of curvature of 1/5-1/3 of the side length of the first light-emitting layer, and the arc segment having an outline of the second convex structure having a radius of curvature of 1/5-1/3 of the side length of the second light-emitting layer; alternatively, the first and second electrodes may be,

the outlines of the first protruding structure and the second protruding structure are both broken line segments, the side length of a virtual polygon formed by the broken line segments formed by the outline of the first protruding structure is 1/5-1/3 of the side length of the first light-emitting layer, and the side length of a virtual polygon formed by the broken line segments formed by the outline of the second protruding structure is 1/5-1/3 of the side length of the second light-emitting layer.

20. The display backplane of claim 15, wherein the first raised structure and the second raised structure are both curved segments, and the curved segment formed by the first raised structure and the curved segment formed by the second raised structure are symmetrical with respect to a line perpendicular to the first direction; alternatively, the first and second electrodes may be,

the outline of the first protruding structure and the outline of the second protruding structure are both broken line segments, and the broken line segment formed by the outline of the first protruding structure and the broken line segment formed by the outline of the second protruding structure are symmetrical relative to a straight line vertical to the first direction.

21. The display backplane of claim 16, wherein the virtual vertex of the first vertex angle and the virtual vertex of the second vertex angle lie on a line parallel to the first direction.

22. The display backplane of claim 16, wherein an orthographic projection of a virtual vertex of the first vertex angle on the substrate is within an orthographic projection of the second luminescent layer on the substrate, and wherein an orthographic projection of a virtual vertex of the second vertex angle on the substrate is within an orthographic projection of the first luminescent layer on the substrate.

23. The display backplane of claim 16, wherein the first and second light emitting layers are shaped as a quadrilateral, hexagon, or octagon with convex structures at corners, and wherein the angle at the virtual vertex of the first corner and the angle at the virtual vertex of the second corner are each independently 45 degrees to 135 degrees.

24. A display backplane according to claim 16, 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 the first light emitting layers and the second light emitting layers adjacent to each other in the second direction have apex angles arranged oppositely in the second direction;

in the second direction, a vertex angle of the first light-emitting layer, which is opposite to a vertex angle of the second light-emitting layer, is a third vertex angle, a vertex angle of the second light-emitting layer, which is opposite to the vertex angle of the first light-emitting layer, is a fourth vertex angle, the first light-emitting layer includes a third compensation portion protruding from the third vertex angle, the third compensation portion is integrally connected to the first light-emitting layer main body at the third vertex angle, the second light-emitting layer includes a fourth compensation portion protruding from the fourth vertex angle, the fourth compensation portion is integrally connected to the second light-emitting layer main body at the fourth vertex angle, and the third compensation portion and the fourth compensation portion are partially overlapped;

and in the second direction, the orthographic projections of the third compensation part and the fourth compensation part on the substrate are positioned between the orthographic projections of the light-emitting areas of the first sub-pixel and the second sub-pixel on the substrate, and do not overlap with the orthographic projections of the light-emitting areas of the first sub-pixel and the second sub-pixel on the substrate.

25. The display backplane of claim 24, further comprising a plurality of third subpixels, the third subpixels surrounded by two first subpixels and two second subpixels formed in a 2 x 2 matrix;

26. The display backplane of claim 25, wherein the centers of the light emitting areas of the two first sub-pixels and the two second sub-pixels forming the 2 x 2 matrix are located at four vertices of an imaginary rectangle, respectively, and 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 imaginary rectangle.

27. The display backplane of claim 25, wherein the outlines of the protruding structures at the top corners of the first and second light-emitting layers are both arc line segments and the third light-emitting layer is rounded rectangle, or wherein the outlines of the protruding structures at the top corners of the first and second light-emitting layers are both broken line segments and the third light-emitting layer is rounded rectangle.

28. The display backplane of claim 25, 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.

29. The display backplane of claim 28, wherein the first light-emitting layer and the second light-emitting layer are each a square with four corners having protruding structures, the protruding structures of the four corners have circular arcs in outline, the area of the second light-emitting layer is larger than that of the first light-emitting layer, the third light-emitting layer is a rounded rectangle, 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.

30. A display backplane, comprising:

a substrate;

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, which is opposite to the vertex angle of the second light-emitting layer, is a first vertex angle, the vertex angle of the second light-emitting layer, which is opposite to the vertex angle of the first light-emitting layer, is a second vertex angle, the part where two edges of the first vertex angle and the second vertex angle extend and meet towards the vertex angle is formed into a straight line segment so that the vertex angle becomes a flat chamfer, and the straight line segment of the first vertex angle and the straight line segment of the second vertex angle are at least partially overlapped;

the orthographic projection of the light emitting area of the first sub-pixel on the substrate falls into 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 into the orthographic projection of the second light emitting layer on the substrate, and in the first direction, the orthographic projection of the straight-line segment of the flat chamfer on the substrate is positioned between 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 and does not overlap with 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.

31. A display backplane according to claim 30, 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, the first light emitting layers and the second light emitting layers adjacent to each other in the second direction having apex angles arranged oppositely in the second direction;

in the second direction, of opposite vertex angles of the adjacent first light-emitting layer and the second light-emitting layer, a vertex angle of the first light-emitting layer, which is opposite to a vertex angle of the second light-emitting layer, is a third vertex angle, a vertex angle of the second light-emitting layer, which is opposite to the vertex angle of the first light-emitting layer, is a fourth vertex angle, a part where two edges of at least one vertex angle of the third vertex angle and the fourth vertex angle extend and meet towards the vertex angle of the vertex angle is formed into a straight line segment so that the vertex angle becomes a flat chamfer, and a straight line segment of the third vertex angle and a straight line segment of the fourth vertex angle are at least partially overlapped;

and in the second direction, the orthographic projection of the straight-line segment of the flat chamfer on the substrate is positioned between the orthographic projections of the light-emitting areas of the first sub-pixel and the second sub-pixel on the substrate, and the straight-line segment of the flat chamfer does not overlap with the orthographic projections of the light-emitting areas of the first sub-pixel and the second sub-pixel on the substrate.

32. A reticle assembly for use in preparing a light emitting layer in a display backplane according to any one of claims 1 to 31, comprising:

a first mask having a plurality of first openings for forming a first light emitting layer;

a second mask having a plurality of second openings for forming a second light emitting layer.

33. The reticle assembly of claim 32, further comprising:

a third mask having a plurality of third openings for forming a third light emitting layer.