Display substrate and display device

Abstract

A display substrate and a display device. The display substrate comprises a display region (100) and a bezel region (200) arranged around the display region (100); the bezel region (200) comprises at least one corner region (230); the at least one corner region (230) has a symmetry axis extending from a corner inner contour (230-2) towards a corner outer contour (230-1); the at least one corner region (230) comprises a flow blocking region (10); an organic encapsulation layer (108) covers at least part of the flow blocking region (10); the flow blocking region (10) is configured to block material of the organic encapsulation layer (108) from flowing from the corner inner contour (230-2) towards the corner outer contour (230-1); the flow blocking region (10) comprises at least one sub-flow blocking region; the capability of the at least one sub-flow blocking region to block material flow of the organic encapsulation layer (108) gradually increases towards the symmetry axis.

Description

A display substrate and a display device

[0001] This application claims priority to Chinese Patent Application No. 202510229619.8, filed on February 27, 2025, entitled "A Display Substrate and Display Device", the contents of which are to be understood as incorporated herein by reference. Technical Field

[0002] This article relates to, but is not limited to, the field of display technology, specifically to a display substrate and a display device. Background Technology

[0003] Organic light-emitting diodes (OLEDs) and quantum dot light-emitting diodes (QLEDs) are active-matrix display devices with advantages such as self-illumination, wide viewing angle, high contrast, low power consumption, extremely high response speed, thinness, flexibility, and low cost. With the continuous development of display technology, flexible displays using OLEDs or QLEDs as light-emitting devices and controlled by thin-film transistors (TFTs) have become the mainstream products in the display field. Summary of the Invention

[0004] This application provides a display substrate, including: a display area and a border area surrounding the display area; the display area includes an encapsulation structure layer disposed on a substrate, the encapsulation structure layer including an organic encapsulation layer, the border area including at least one corner area, the at least one corner area having an inner corner contour and an outer corner contour, the at least one corner area having a symmetry axis extending along the inner corner contour toward the outer corner contour, the at least one corner area including a flow-blocking area, the organic encapsulation layer covering at least a portion of the flow-blocking area, the flow-blocking area being configured to impede the flow of the organic encapsulation layer material along the inner corner contour toward the outer corner contour, the flow-blocking area including at least one sub-flow-blocking area, the ability of the at least one sub-flow-blocking area to impede the flow of the organic encapsulation layer material gradually increasing along a direction close to the symmetry axis.

[0005] In an exemplary embodiment, the at least one sub-blocking region is a strip groove structure. The extension direction of the strip groove structure is approximately the same as the extension direction of the inner contour of the corner. At least one of the groove depth and groove width of the strip groove structure gradually increases along the direction close to the axis of symmetry. The groove depth of the strip groove structure refers to the maximum dimension of the strip groove structure on the plane perpendicular to the display substrate. The groove width of the strip groove structure refers to the distance between the outer contour and the inner contour of the strip groove structure.

[0006] In an exemplary embodiment, the flow-blocking region includes a plurality of sub-flow-blocking regions, which are arranged sequentially along the inner contour of the corner toward the outer contour of the corner. At least one of the groove depth and groove width of at least some of the sub-flow-blocking regions gradually decreases or increases along the inner contour of the corner toward the outer contour of the corner.

[0007] In an exemplary embodiment, the at least one sub-blocking region includes a plurality of through holes arranged at intervals. At least one of the density, depth, and opening area of ​​the through holes gradually increases along a direction close to the axis of symmetry. The density of the through holes refers to the number of through holes per unit area of ​​the sub-blocking region. The depth of the through holes refers to the maximum size of the through holes on a plane perpendicular to the display substrate. The opening area of ​​the through holes refers to the area of ​​the through holes projected onto the plane of the display substrate from the side of the through holes away from the substrate.

[0008] In an exemplary embodiment, the flow-blocking region includes a plurality of sub-flow-blocking regions, which are arranged sequentially along the inner contour of the corner toward the outer contour of the corner. At least one of the density, depth and opening area of ​​the through holes in at least some of the sub-flow-blocking regions gradually decreases or increases along the inner contour of the corner toward the outer contour of the corner.

[0009] In an exemplary embodiment, the at least one sub-obstruction zone includes a plurality of obstruction grooves spaced apart along the extension direction of the inner contour of the corner. Each obstruction groove includes a straight groove and an arcuate groove connected to at least one side of the straight groove. The straight groove extends along the inner contour of the corner toward the outer contour of the corner. Both ends of the arcuate groove are connected to one side of the straight groove. The arcuate grooves are spaced apart along the extension direction of the straight grooves and protrude toward the display area. At least one of the density, depth, and width of the straight grooves gradually increases along a direction close to the axis of symmetry. The density of the straight grooves refers to the... The number of arc grooves per unit area in the sub-blocking region; the groove depth of the straight groove refers to the maximum dimension of the straight groove on the plane perpendicular to the display substrate; the groove width of the straight groove refers to the distance between the outer and inner contours of the straight groove; and / or, at least one of the density, groove depth, and groove width of the arc groove gradually increases along the direction close to the axis of symmetry; the density of the arc groove refers to the number of arc grooves per unit area in the sub-blocking region; the groove depth of the arc groove refers to the maximum dimension of the arc groove on the plane perpendicular to the display substrate; the groove width of the arc groove refers to the distance between the outer and inner contours of the arc groove.

[0010] In an exemplary embodiment, the flow-blocking region includes a plurality of sub-flow-blocking regions, which are arranged sequentially along the inner contour of the corner toward the outer contour of the corner. At least some of the sub-flow-blocking regions have at least one of the density, depth, and width of the straight grooves, which gradually decrease or increase along the inner contour of the corner toward the outer contour of the corner; and / or, at least some of the density, depth, and width of the arcuate grooves in at least some of the sub-flow-blocking regions have at least one of the density, depth, and width, which gradually decrease or increase along the inner contour of the corner toward the outer contour of the corner.

[0011] In an exemplary embodiment, the flow-blocking region includes a plurality of sub-flow-blocking regions, which are arranged sequentially along the inner contour of the corner toward the outer contour of the corner. The straight grooves of at least some adjacent sub-flow-blocking regions are connected to form a single unit, thereby forming a straight structure extending along the inner contour of the corner toward the outer contour of the corner.

[0012] In an exemplary embodiment, the flow-blocking region includes a plurality of sub-flow-blocking regions, which are arranged sequentially along the inner contour of the corner toward the outer contour of the corner. The plurality of sub-flow-blocking regions are strip-shaped, and the extension direction of the plurality of sub-flow-blocking regions is approximately the same as the extension direction of the inner contour of the corner. The number of the plurality of sub-flow-blocking regions arranged along the inner contour of the corner toward the outer contour of the corner gradually increases along the direction close to the axis of symmetry.

[0013] In an exemplary embodiment, the extension length of the plurality of sub-blocking regions gradually increases or decreases along the inner contour of the corner toward the outer contour of the corner, and the two ends of one of the adjacent sub-blocking regions extend from the two ends of the other of the adjacent sub-blocking regions.

[0014] In an exemplary embodiment, the outer contour of the corner includes at least a first arc segment that protrudes along a direction away from the display area, the inner contour of the corner includes at least a second arc segment that protrudes along a direction away from the display area, and the at least one sub-blocking area includes an arc portion that protrudes toward a direction away from the display area, and the curvature of the arc portion is approximately the same as at least one of the first arc segment and the second arc segment.

[0015] In an exemplary embodiment, the flow-blocking area includes a plurality of sub-flow-blocking areas, which are arranged sequentially along the inner contour of the corner toward the outer contour of the corner, and at least some of the adjacent sub-flow-blocking areas are connected to each other to form a whole; and / or, at least some of the adjacent sub-flow-blocking areas are spaced apart.

[0016] In an exemplary embodiment, the outer contour of the corner includes at least a first arc segment protruding along a direction away from the display area, and the inner contour of the corner includes at least a second arc segment protruding along a direction away from the display area. The flow-blocking area has a flow-blocking outer contour, a flow-blocking inner contour, and an end contour connecting the flow-blocking outer contour and the flow-blocking inner contour. The flow-blocking outer contour includes at least a third arc segment, which protrudes along a direction away from the display area and is disposed opposite to the first arc segment of the outer contour of the corner. The flow-blocking inner contour includes at least a fourth arc segment, which protrudes along a direction away from the display area and is disposed opposite to the second arc segment of the inner contour of the corner. The end contour is a stepped structure extending along the inner contour of the corner toward the outer contour of the corner.

[0017] In an exemplary embodiment, the corner area includes a first isolation wall and a second isolation wall, the first isolation wall being located on the side of the second isolation wall closer to the display area, and the flow-blocking area being provided between the first isolation wall and the second isolation wall.

[0018] This application also provides a display device, including the aforementioned display substrate.

[0019] The present invention discloses that the flow-blocking capability of the display substrate through the sub-flow-blocking region gradually increases along the direction close to the axis of symmetry, thereby reducing the climbing ability of the organic encapsulation layer material in the flow-blocking region. This ensures the uniformity of the flow of the organic encapsulation layer material in the corner region, avoids the overflow of the organic encapsulation layer material in the corner region near the axis of symmetry, ensures the uniformity of the film thickness of the organic encapsulation layer in the corner region, and solves the problem of corner brightness of the display substrate.

[0020] This embodiment of the display substrate shows that the number of sub-blocking regions arranged along the inner contour of the corner towards the outer contour of the corner gradually increases in the direction close to the axis of symmetry. This gradually enhances the flow-blocking ability of the blocking regions in the direction close to the axis of symmetry, thereby reducing the ramping ability of the organic encapsulation layer material in the corner area. This ensures the uniformity of the flow of the organic encapsulation layer material in the corner area, effectively suppressing the ramping ability of the organic encapsulation layer material in the corner area close to the axis of symmetry, preventing the overflow of the organic encapsulation layer material in the corner area close to the axis of symmetry, ensuring the uniformity of the film thickness of the organic encapsulation layer in the corner area, and solving the problem of corner brightness of the display substrate.

[0021] This embodiment of the display substrate, through the strip groove structure of the sub-blocking region, can increase the ramp distance of the organic encapsulation layer material, so that the ramp distance of the organic encapsulation layer material gradually increases along the direction close to the axis of symmetry; and the strip groove structure can accommodate part of the organic encapsulation layer material, so that the sub-blocking region can effectively reduce the ramp ability of the organic encapsulation layer material in the direction close to the axis of symmetry, avoid the overflow of the organic encapsulation layer material in the corner area close to the axis of symmetry, ensure the uniformity of the film thickness of the organic encapsulation layer in the corner area, and solve the problem of corner brightness of the display substrate.

[0022] This embodiment of the display substrate shows that the multiple vias in the sub-blocking region can increase the ramp distance of the organic encapsulation layer material, so that the ramp distance of the organic encapsulation layer material gradually increases along the direction close to the axis of symmetry; and the multiple vias can accommodate part of the organic encapsulation layer material, so that the sub-blocking region can effectively reduce the ramp ability of the organic encapsulation layer material in the direction close to the axis of symmetry, avoid the overflow of the organic encapsulation layer material in the corner area close to the axis of symmetry, ensure the uniformity of the film thickness of the organic encapsulation layer in the corner area, and solve the problem of corner brightness of the display substrate.

[0023] This embodiment of the display substrate shows that the flow-blocking groove in the sub-flow-blocking region can increase the ramp distance of the organic encapsulation layer material, so that the ramp distance of the organic encapsulation layer material gradually increases along the direction close to the axis of symmetry; and the flow-blocking groove can accommodate part of the organic encapsulation layer material, so that the sub-flow-blocking region can effectively reduce the ramp ability of the organic encapsulation layer material in the direction close to the axis of symmetry, avoid the overflow of the organic encapsulation layer material in the corner area close to the axis of symmetry, ensure the uniformity of the film thickness of the organic encapsulation layer in the corner area, and solve the problem of corner brightness of the display substrate.

[0024] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the embodiments described in the description and the accompanying drawings.

[0025] Overview of the attached figures

[0026] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0027] Figure 1 is a schematic diagram of the planar structure of a related display substrate;

[0028] Figure 2 is a schematic cross-sectional view of a related display substrate;

[0029] Figure 3 is a schematic cross-sectional view of another related display substrate;

[0030] Figure 4 is a schematic diagram of a planar structure of a display substrate provided in an embodiment of this disclosure;

[0031] Figure 5 is an enlarged view of a corner region of a display substrate provided in an embodiment of this disclosure;

[0032] Figure 6 is a schematic diagram of the structure of the flow-blocking region of a display substrate provided in an embodiment of this disclosure;

[0033] Figure 7a is a schematic cross-sectional view of the central region of a corner area in a display substrate according to an embodiment of the present disclosure;

[0034] Figure 7b is a schematic cross-sectional view of the second edge region of a corner area in a display substrate according to an embodiment of the present disclosure;

[0035] Figure 7c is a schematic cross-sectional view of the first edge region of a corner area in a display substrate according to an embodiment of the present disclosure.

[0036] Figure 8 is an enlarged view of the corner region of another display substrate provided in an embodiment of this disclosure;

[0037] Figure 9a is a schematic cross-sectional view of the central region of a corner area in another display substrate provided in an embodiment of the present disclosure;

[0038] Figure 9b is a schematic cross-sectional view of the second edge region of the corner area in another display substrate provided in an embodiment of the present disclosure;

[0039] Figure 10 is an enlarged view of the corner region of another display substrate provided in an embodiment of this disclosure;

[0040] Figure 11a is a schematic cross-sectional view of the central region of a corner area in another display substrate provided in an embodiment of the present disclosure;

[0041] Figure 11b is a schematic cross-sectional view of the second edge region of the corner area in another display substrate provided in an embodiment of the present disclosure;

[0042] Figure 11c is a schematic cross-sectional view of the first edge region of the corner area in another display substrate provided in an embodiment of the present disclosure;

[0043] Figure 12 is an enlarged view of the corner region of another display substrate provided in an embodiment of this disclosure;

[0044] Figure 13 is a partial enlarged view of the first sub-blocking region, the second sub-blocking region, and the third sub-blocking region of another display substrate provided in an embodiment of the present disclosure;

[0045] Figure 14a is a cross-sectional schematic diagram of the arc-shaped groove of the flow-blocking groove in another display substrate provided in an embodiment of the present disclosure;

[0046] Figure 14b is a cross-sectional schematic diagram of the straight groove of the flow-blocking groove in another display substrate provided in an embodiment of this disclosure.

[0047] Detailed Explanation

[0048] This application describes several embodiments, but these descriptions are exemplary and not limiting, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0049] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application can also be combined with any conventional features or elements to form unique inventive solutions. Any feature or element of any embodiment can also be combined with features or elements from other inventive solutions to form another unique inventive solution. Therefore, it should be understood that any feature shown and / or discussed in this application can be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes can be made within the scope of the appended claims.

[0050] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0051] In organic light-emitting diode (OLED) display substrates, the display area achieves water and oxygen isolation by forming an encapsulation layer on the light-emitting structure layer. The encapsulation layer typically includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked sequentially, forming an inorganic / organic / inorganic material stack structure. The first and second inorganic encapsulation layers are used for water and oxygen barrier, while the organic encapsulation layer is used for stress relief and planarization. The organic encapsulation layer can be formed using inkjet printing (IJP). Due to the high fluidity of ink, the first and second inorganic encapsulation layers need to completely encapsulate the organic encapsulation layer; otherwise, ink overflow can easily occur, leading to the failure of water and oxygen barrier in the encapsulation structure layer and affecting the encapsulation effect.

[0052] Figure 1 is a schematic diagram of a planar structure of a related display substrate. As shown in Figure 1, on a plane parallel to the display substrate, the related display substrate includes a display area 100' and a border area 200' surrounding the display area 100'. The display area 100' can be rectangular or rounded rectangular in shape, and includes multiple sub-pixels forming a pixel array. The multiple sub-pixels are configured to display dynamic images or still images. The border area 200' can be a rectangular ring or a rounded rectangular ring in shape.

[0053] Figure 2 is a schematic cross-sectional view of a related display substrate. Figure 2 can be a cross-sectional view along the A-A' direction in Figure 1. As shown in Figure 2, on a plane perpendicular to the display substrate, the bezel region 200' includes a substrate 101', a first organic dielectric layer 102' disposed on the substrate 101', a second organic dielectric layer 103' disposed on the side of the first organic dielectric layer 102' away from the substrate 101', a third organic dielectric layer 104' disposed on the side of the second organic dielectric layer 103' away from the substrate 101', an isolation structure layer disposed on the side of the third organic dielectric layer 104' away from the substrate 101', and an organic encapsulation layer disposed on the side of the isolation structure layer away from the substrate 101'. The isolation structure layer includes a first isolation wall 105-1', a second isolation wall 105-2', and a third isolation wall 105-3' disposed on the side of the third organic dielectric layer 104' away from the substrate 101'. The first isolation wall 105-1', the second isolation wall 105-2', and the third isolation wall 105-3' are arranged sequentially at intervals along the direction away from the display area 100'. The third organic dielectric layer 104' is provided with a first isolation groove 106-1', a second isolation groove 106-2', and a third isolation groove 106-3'. The first isolation groove 106-1' is located between the first isolation wall 105-1' and the second isolation wall 105-2', the second isolation groove 106-2' is located between the second isolation wall 105-2' and the third isolation wall 105-3', and the third isolation groove 106-3' is located on the side of the third isolation wall 105-3' away from the display area 100'. The organic encapsulation layer includes a first inorganic encapsulation layer 107', an organic encapsulation layer 108', and a second inorganic encapsulation layer 109' stacked sequentially along a direction away from the substrate 101'. Both the first inorganic encapsulation layer 107' and the second inorganic encapsulation layer 109' cover the first isolation wall 105-1', the first isolation groove 106-1', the second isolation wall 105-2', the second isolation groove 106-2', the third isolation wall 105-3', and the third isolation groove 106-3'. The organic encapsulation layer 108' covers the first isolation wall 105-1', the first isolation groove 106-1', the second isolation wall 105-2', and the second isolation groove 106-2', extending to the third isolation wall 105-3'. It is blocked by the third isolation wall 105-3', so that the organic encapsulation layer 108' extends to the side of the third isolation wall 105-3' away from the display area. The organic encapsulation layer 108' does not cover the third isolation groove 106-3'. The first isolation wall 105-1', the second isolation wall 105-2', and the third isolation wall 105-3' are used to impede the flow of the organic encapsulation layer 108', preventing the organic encapsulation layer 108' from overflowing and causing the water and oxygen barrier of the encapsulation structure layer to fail, thus affecting the encapsulation effect. The first isolation trench 106-1', the second isolation trench 106-2', and the third isolation trench 106-3' are used to isolate conductive materials (such as organic light-emitting layer materials) extending from the display area.

[0054] However, because the first isolation wall 105-1', the second isolation wall 105-2' and the third isolation wall 105-3' are provided on the border area 200', the width of the border area 200' is relatively large, which cannot meet the requirements of the narrow border design.

[0055] Figure 3 is a cross-sectional view of another related display substrate. Figure 3 can be considered a cross-sectional view along the A-A' direction in Figure 1. The structure of the related display substrate shown in Figure 3 is largely the same as that shown in Figure 2. The difference is that, as shown in Figure 3, the second isolation wall and the second isolation groove are removed from the bezel area 200'. The isolation structure layer only includes the first isolation wall 105-1' and the third isolation wall 105-3', thereby reducing the width of the bezel area 200' and achieving a narrow bezel design.

[0056] The inventors of this application discovered that during the formation of the organic encapsulation layer 108', ink droplets are first dropped onto the substrate of the display area; then, the ink droplets are allowed to diffuse on the substrate and fuse with adjacent ink droplets to form a continuous and uniform liquid film; subsequently, the liquid film is irradiated with ultraviolet light to form the organic encapsulation layer 108'. During the ink droplet diffusion process, the fusion of ink droplets generates an impact force, propelling the liquid film towards the border area 200'. When the liquid film diffuses to the corner area of ​​the border area 200', the impact force propelling the liquid film is greater than that in other areas of the border area 200', increasing the liquid film's climbing ability in the corner area of ​​the border area 200'. This makes it easier for the liquid film to climb at the third isolation wall 105-3' in the corner area of ​​the border area 200', causing the liquid film to overflow, resulting in the failure of the water and oxygen barrier of the encapsulation structure layer and affecting the encapsulation effect.

[0057] Furthermore, because the liquid film of the organic encapsulation layer 108' slopes up at the third isolation wall 105-3', the thickness of the color filter structure layer 110' located in the display area 100' is greater than the thickness of the color filter structure layer 110' located in the bezel area 200'. This results in the display substrate having higher brightness at the corners than in other areas in a bright state, and higher light reflectivity at the corners than in other areas in a dark state, affecting the display effect of the display substrate. Increasing the horizontal distance between the first isolation wall 105-1' and the third isolation wall 105-3' to prevent the liquid film from sloping up at the third isolation wall 105-3' would increase the width of the bezel area 200', failing to meet the requirements of a narrow bezel design.

[0058] This application provides a display substrate, including: a display area and a border area surrounding the display area; the display area includes an encapsulation structure layer disposed on a substrate, the encapsulation structure layer including an organic encapsulation layer, the border area including at least one corner area, the at least one corner area having an inner corner contour and an outer corner contour, the at least one corner area having a symmetry axis extending along the inner corner contour toward the outer corner contour, the at least one corner area including a flow-blocking area, the organic encapsulation layer covering at least a portion of the flow-blocking area, the flow-blocking area being configured to impede the flow of the organic encapsulation layer material along the inner corner contour toward the outer corner contour, the flow-blocking area including at least one sub-flow-blocking area, the ability of the at least one sub-flow-blocking area to impede the flow of the organic encapsulation layer material gradually increasing along a direction close to the symmetry axis.

[0059] Figure 4 is a schematic diagram of the planar structure of a display substrate provided in an embodiment of the present disclosure; Figure 5 is an enlarged view of the corner area of ​​a display substrate provided in an embodiment of the present disclosure. Figure 5 can be an enlarged view of point a in Figure 4. In an exemplary embodiment, as shown in Figures 4 and 5, in a direction parallel to the plane of the display substrate, the display substrate of the present disclosure includes a display area 100 and a border area 200 surrounding the display area 100. The display area 100 can be a rounded rectangle, with rounded corners at its four corners. The display area 100 includes multiple sub-pixels forming a pixel array, configured to display dynamic or static images. The border area 200 can be a rounded rectangular ring, with rounded corners at its four outer contours. The border area 200 may include an encapsulation area, on which multiple isolation walls and isolation grooves are provided. The encapsulation area is configured to prevent the overflow of organic encapsulation layer material on the display area 100.

[0060] In some embodiments, the display area can be rectangular in shape, with its four corners being right angles. The border area can be rectangular and annular, with its four corners being right angles.

[0061] In an exemplary embodiment, the border region 200 includes a first side region 210, a second side region 220, and a corner region 230 connecting adjacent first side regions 210 and second side regions 220. The first side region 210 is a strip extending along a first direction X, the second side region 220 is a strip extending along a second direction Y, and the corner region 230 is an arcuate strip. A first end of the corner region 230 is connected to one end of the first side region 210, and a second end of the corner region 230 is connected to one end of the second side region 220. The corner region 230 has a corner outer contour 230-1 and a corner inner contour 230-2. The corner outer contour 230-1 is the edge contour of the corner region 230 on the side away from the display area 100. The corner outer contour 230-1 includes a first straight line segment extending along the first direction X, a second straight line segment extending along the second direction Y, and a first arcuate segment connecting the first straight line segment and the second straight line segment. The first arcuate segment protrudes along the direction away from the display area 100. The inner corner contour 230-2 is the edge contour of the corner region 230 near the display area 100. The inner corner contour 230-2 is the contour of the corner of the display area 100. The inner corner contour 230-2 includes a third straight line segment extending along a first direction X, a fourth straight line segment extending along a second direction Y, and a second arc segment connecting the third and fourth straight line segments. The second arc segment protrudes in a direction away from the display area 100. For example, the second arc segment of the inner corner contour 230-2 has approximately the same curvature as the first arc segment of the outer corner contour 230-1. Both the first direction X and the second direction Y are parallel to the plane of the display substrate. The first direction X and the second direction Y intersect each other; for example, the first direction X and the second direction Y are perpendicular to each other.

[0062] In an exemplary embodiment, a flow-blocking region 10 is provided on the corner region 230. The flow-blocking region 10 is located in the encapsulation area of ​​the corner region 230. An organic encapsulation layer covers at least a portion of the flow-blocking region 10. The flow-blocking region 10 is configured to prevent the organic encapsulation layer material from flowing along the inner corner contour 230-2 of the corner region 230 toward the outer corner contour 230-1 of the corner region 230, thereby preventing the organic encapsulation layer material from climbing at the isolation wall on the corner region 230 and avoiding the overflow of the organic encapsulation layer material on the corner region 230.

[0063] In an exemplary embodiment, the flow-blocking region 10 has a flow-blocking outer contour 10-1, a flow-blocking inner contour 10-2, and an end contour 10-3 connecting the flow-blocking outer contour 10-1 and the flow-blocking inner contour 10-2. The flow-blocking outer contour 10-1 is the edge contour of the flow-blocking region 10 away from the display area 100. The flow-blocking outer contour 10-1 includes at least a third arc segment, which protrudes along the direction away from the display area 100, and is disposed opposite to the first arc segment of the corner outer contour 230-1. For example, the third arc segment may have approximately the same curvature as the first arc segment of the corner outer contour 230-1. The flow-blocking inner contour 10-2 is the edge contour of the flow-blocking region 10 near the display area 100. The flow-blocking inner contour 10-2 includes at least a fourth arc segment, which protrudes along the direction away from the display area 100, and is disposed opposite to the second arc segment of the corner inner contour 230-2. For example, the fourth arc segment can have approximately the same curvature as the second arc segment of the inner corner contour 230-2. The end contour 10-3 is the edge contour of the flow-blocking area 10 on both sides, and the end contour 10-3 is a stepped structure extending along the inner corner contour 230-2 toward the outer corner contour 230-1.

[0064] In an exemplary embodiment, the corner region 230 of the border region 200 has a symmetry axis O, which extends along the inner corner contour 230-2 toward the outer corner contour 230-1. The symmetry axis O divides the corner region 230 into two parts that are symmetrically arranged about the symmetry axis O.

[0065] In an exemplary embodiment, the flow-blocking region 10 is divided into two parts that are symmetrically arranged about the axis of symmetry O. The flow-blocking ability of the flow-blocking region 10 to prevent the organic encapsulation layer material from flowing along the inner contour 230-2 of the corner toward the outer contour 230-1 of the corner gradually increases along the direction close to the axis of symmetry O.

[0066] In an exemplary embodiment, the corner region 230 includes a first edge region, a second edge region, a central region, a third edge region, and a fourth edge region connected sequentially along the extension direction of the inner corner contour 230-2. The flow-blocking capacity of the flow-blocking region 10 located in the central region, which hinders the flow of organic encapsulation layer material along the inner corner contour 230-2 toward the outer corner contour 230-1, is greater than that of the flow-blocking regions 10 located in the second and third edge regions. Similarly, the flow-blocking capacity of the flow-blocking regions 10 located in the second and third edge regions, which hinder the flow of organic encapsulation layer material along the inner corner contour 230-2 toward the outer corner contour 230-1, is greater than that of the flow-blocking regions 10 located in the first and fourth edge regions.

[0067] The present invention discloses that the flow-blocking capability of the display substrate through the flow-blocking region 10 gradually increases along the direction close to the axis of symmetry O, thereby reducing the climbing ability of the organic encapsulation layer material in the flow-blocking region 10. This ensures the uniformity of the flow of the organic encapsulation layer material in the corner region 230, prevents the organic encapsulation layer material from overflowing in the corner region 230 near the axis of symmetry O, ensures the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region, and solves the problem of corner brightness of the display substrate.

[0068] In an exemplary embodiment, the flow-blocking region 10 includes a first sub-flow-blocking region 11, a second sub-flow-blocking region 12, and a third sub-flow-blocking region 13. These three sub-flow-blocking regions are configured to impede the flow of organic encapsulation layer material along the inner corner contour 230-2 toward the outer corner contour 230-1. The first sub-flow-blocking region 11, the second sub-flow-blocking region 12, and the third sub-flow-blocking region 13 are all strip-shaped, and their extending directions are substantially the same as the extending direction of the inner corner contour 230-2 of the corner region 230. The first sub-obstruction zone 11, the second sub-obstruction zone 12, and the third sub-obstruction zone 13 are arranged sequentially along the outer corner contour 230-1 of the corner region 230 towards the inner corner contour 230-2 of the corner region 230. The outer contour of the first sub-obstruction zone 11 is the obstruction outer contour 10-1 of the obstruction zone 10, and the inner contour of the first sub-obstruction zone 11 is connected to the outer contour of the second sub-obstruction zone 12. The outer contour of the second sub-obstruction zone 12 is connected to the inner contour of the first sub-obstruction zone 11, and the inner contour of the second sub-obstruction zone 12 is connected to the outer contour of the third sub-obstruction zone 13. The outer contour of the third sub-obstruction zone 13 is connected to the inner contour of the second sub-obstruction zone 12, and the inner contour of the third sub-obstruction zone 13 is the obstruction inner contour 10-2 of the obstruction zone 10. The opposite ends of the first sub-obstruction zone 11, the second sub-obstruction zone 12 and the third sub-obstruction zone 13 respectively form the end contour 10-3 of the obstruction zone 10, which has a stepped structure.

[0069] In some embodiments, the flow choking region may include a number of sub-flow choking regions other than the three sub-flow choking regions. For example, the flow choking region may include one, two, four, five, six, or other sub-flow choking regions. The embodiments disclosed herein will not be described in detail here.

[0070] In an exemplary embodiment, the extension length of the first sub-blocking region 11 is greater than the extension length of the second sub-blocking region 12, and both ends of the first sub-blocking region 11 extend from both ends of the second sub-blocking region 12; the extension length of the second sub-blocking region 12 is greater than the extension length of the third sub-blocking region 13, and both ends of the second sub-blocking region 12 extend from both ends of the third sub-blocking region 13. The number of sub-blocking regions arranged along the inner corner contour 230-2 toward the outer corner contour 230-1 gradually increases along the direction close to the axis of symmetry O, so that the flow-blocking ability of the blocking region 10 to prevent the organic encapsulation layer material from flowing along the inner corner contour 230-2 toward the outer corner contour 230-1 gradually increases along the direction close to the axis of symmetry O.

[0071] In an exemplary embodiment, the central region of the corner region 230 is provided with three sub-flow-blocking regions, namely the first sub-flow-blocking region 11, the second sub-flow-blocking region 12 and the third sub-flow-blocking region 13; the second edge region and the third edge region of the corner region 230 are provided with two sub-flow-blocking regions, namely the first sub-flow-blocking region 11 and the second sub-flow-blocking region 12; and the first edge region and the fourth edge region of the corner region 230 are provided with one sub-flow-blocking region, namely the third sub-flow-blocking region 13. The number of neutron flow-blocking regions in the central region of corner region 230 is greater than the number of neutron flow-blocking regions in the second and third edge regions of corner region 230. The flow-blocking capacity of the neutron flow-blocking region 10 in the central region of corner region 230 to prevent the organic encapsulation layer material from flowing along the inner corner contour 230-2 toward the outer corner contour 230-1 is greater than the flow-blocking capacity of the neutron flow-blocking region 10 in the second and third edge regions of corner region 230 to prevent the organic encapsulation layer material from flowing along the inner corner contour 230-2 toward the outer corner contour 230-1. The number of neutron flow-blocking regions in the second and third edge regions of corner region 230 is greater than the number of neutron flow-blocking regions in the first and fourth edge regions of corner region 230. The flow-blocking capacity of the flow-blocking regions 10 in the second and third edge regions of corner region 230 to prevent the organic encapsulation layer material from flowing along the inner corner contour 230-2 toward the outer corner contour 230-1 is greater than the flow-blocking capacity of the flow-blocking regions 10 in the first and fourth edge regions of corner region 230 to prevent the organic encapsulation layer material from flowing along the inner corner contour 230-2 toward the outer corner contour 230-1.

[0072] This embodiment of the display substrate shows that the number of sub-blocking regions arranged along the inner contour of the corner towards the outer contour of the corner gradually increases in the direction close to the axis of symmetry. This makes the flow blocking ability of the blocking region 10 gradually stronger in the direction close to the axis of symmetry O. This also makes the flow blocking region 10 reduce the ramping ability of the organic encapsulation layer material in the corner region 230. This can effectively suppress the ramping ability of the organic encapsulation layer material in the corner region 230 near the axis of symmetry O, avoid the overflow of the organic encapsulation layer material in the corner region 230 near the axis of symmetry O, ensure the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region, and solve the problem of corner brightness of the display substrate.

[0073] In some embodiments, at least some of the sub-blocking regions in the flow-blocking region may have the same extension length, which will not be described in detail here.

[0074] Figure 6 is a schematic diagram of the structure of a flow-blocking region of a display substrate provided in an embodiment of this disclosure. The flow-blocking region shown in Figure 6 can be the flow-blocking region shown in Figure 5. In an exemplary embodiment, as shown in Figure 6, in a direction parallel to the plane of the display substrate, the first sub-flow-blocking region 11 includes a first straight portion 11-1, a first arcuate portion 11-3, and a second straight portion 11-2 connected sequentially along the extension direction of the inner contour 230-2 of the corner. The first straight portion 11-1 extends along a second direction Y, and its first end is connected to the first end of the first arcuate portion 11-3. The second end of the first straight portion 11-1 extends in the opposite direction of the second direction Y. The second straight portion 11-2 extends along a first direction X, and its first end is connected to the second end of the first arcuate portion 11-3. The second end of the second straight portion 11-2 extends along the first direction X. The first arcuate portion 11-3 protrudes in a direction away from the display area 100. The first arcuate portion 11-3 is located between the outer corner contour 230-1 and the inner corner contour 230-2. The first end of the first arcuate portion 11-3 is connected to the first end of the first straight portion 11-1, and the second end of the first arcuate portion 11-3 is connected to the first end of the second straight portion 11-2. The curvature of the first arcuate portion 11-3 may be approximately the same as the curvature of at least one of the first arcuate segment of the outer corner contour 230-1 and the second arcuate segment of the inner corner contour 230-2.

[0075] In an exemplary embodiment, the second sub-blocking region 12 includes a third straight section 12-1, a second arcuate section 12-3, and a fourth straight section 12-2 connected sequentially along the extension direction of the inner contour 230-2 of the corner. The third straight section 12-1 extends along the second direction Y, and its first end is connected to the first end of the second arcuate section 12-3. The second end of the third straight section 12-1 extends in the opposite direction of the second direction Y. The outer contour of the third straight section 12-1 is connected to the inner contour of the first straight section 11-1 of the first sub-blocking region 11. The second end of the first straight section 11-1 extends out from the second end of the third straight section 12-1. The fourth straight section 12-2 extends along the first direction X. The first end of the fourth straight section 12-2 is connected to the second end of the second arcuate section 12-3. The second end of the fourth straight section 12-2 extends along the first direction X. The outer contour of the fourth straight section 12-2 is connected to the inner contour of the second straight section 11-2 of the first sub-blocking area 11. The second end of the second straight section 11-2 extends out from the second end of the fourth straight section 12-2. The second arcuate section 12-3 protrudes along a direction away from the display area 100. The second arcuate section 12-3 is located between the outer contour 230-1 and the inner contour 230-2 of the corner. The first end of the second arcuate section 12-3 is connected to the first end of the third straight section 12-1. The second end of the second arcuate section 12-3 is connected to the first end of the fourth straight section 12-2. The outer contour of the second arcuate section 12-3 is connected to the inner contour of the first arcuate section 11-3 of the first sub-blocking area 11. The curvature of the second arcuate portion 12-3 may be approximately the same as the curvature of at least one of the first arcuate segment of the outer contour 230-1 of the corner and the second arcuate segment of the inner contour 230-2 of the corner.

[0076] In an exemplary embodiment, the third sub-restriction region 13 includes a fifth straight section 13-1, a third arcuate section 13-3, and a sixth straight section 13-2 connected sequentially along the extension direction of the outer contour 230-1 of the corner. The fifth straight section 13-1 extends along the second direction Y, and its first end is connected to the first end of the third arcuate section 13-3. The second end of the fifth straight section 13-1 extends in the opposite direction of the second direction Y. The outer contour of the fifth straight section 13-1 is connected to the inner contour of the third straight section 12-1 of the second sub-restriction region 12, and the second end of the third straight section 12-1 extends out from the second end of the fifth straight section 13-1. The sixth straight section 13-2 extends along the first direction X. The first end of the sixth straight section 13-2 is connected to the second end of the third arcuate section 13-3. The second end of the sixth straight section 13-2 extends along the first direction X. The outer contour of the sixth straight section 13-2 is connected to the inner contour of the fourth straight section 12-2 of the second sub-blocking area 12. The second end of the fourth straight section 12-2 extends out from the second end of the sixth straight section 13-2. The third arcuate section 13-3 protrudes along a direction away from the display area 100. The third arcuate section 13-3 is located between the outer contour 230-1 and the inner contour 230-2 of the corner. The first end of the third arcuate section 13-3 is connected to the first end of the fifth straight section 13-1. The second end of the third arcuate section 13-3 is connected to the first end of the sixth straight section 13-2. The outer contour of the third arcuate section 13-3 is connected to the inner contour of the second arcuate section 12-3 of the second sub-blocking area 12. The curvature of the third arc portion 13-3 can be approximately the same as the curvature of at least one of the first arc segment of the outer contour 230-1 of the corner portion and the second arc segment of the inner contour 230-2 of the corner portion.

[0077] In an exemplary embodiment, the first sub-obstruction region 11, the second sub-obstruction region 12, and the third sub-obstruction region 13 are all divided into two parts symmetrically arranged about the axis of symmetry O. The first arcuate portion 11-3 of the first sub-obstruction region 11 is divided into two parts symmetrically arranged about the axis of symmetry O, and the first straight portion 11-1 and the second straight portion 11-2 of the first sub-obstruction region 11 are mirror images of each other about the axis of symmetry O. The second arcuate portion 12-3 of the second sub-obstruction region 12 is divided into two parts symmetrically arranged about the axis of symmetry O, and the third straight portion 12-1 and the fourth straight portion 12-2 of the second sub-obstruction region 12 are mirror images of each other about the axis of symmetry O. The third arcuate portion 13-3 of the third sub-obstruction region 13 is divided into two parts symmetrically arranged about the axis of symmetry O, and the fifth straight portion 13-1 and the sixth straight portion 13-2 of the third sub-obstruction region 13 are mirror images of each other about the axis of symmetry O.

[0078] Figure 7a is a cross-sectional view of the central region of a corner area in a display substrate according to an embodiment of the present disclosure; Figure 7b is a cross-sectional view of the second edge region of a corner area in a display substrate according to an embodiment of the present disclosure; Figure 7c is a cross-sectional view of the first edge region of a corner area in a display substrate according to an embodiment of the present disclosure. Figure 7a can be a cross-sectional view along the B1-B1' direction in Figure 5, Figure 7b can be a cross-sectional view along the C1-C1' direction in Figure 5, and Figure 7c can be a cross-sectional view along the D1-D1' direction in Figure 5. In an exemplary embodiment, as shown in Figures 7a, 7b, and 7c, in a direction perpendicular to the plane of the display substrate, the sub-pixels of the display area 100 of the display substrate according to the present disclosure may include a driving circuit layer disposed on a substrate 101, a light-emitting structure layer disposed on the side of the driving circuit layer away from the substrate, and an encapsulation structure layer disposed on the side of the light-emitting structure layer away from the substrate. The substrate 101 may be a flexible substrate or a rigid substrate. The driving circuit layer includes at least a pixel driving circuit, which may include multiple transistors and storage capacitors. The light-emitting structure layer may include a light-emitting device, which may include an anode 21, an organic light-emitting layer 22, and a cathode. The anode 21 is connected to a pixel driving circuit, the organic light-emitting layer 22 is connected to the anode 21, and the cathode is connected to the organic light-emitting layer 22. The organic light-emitting layer 22 emits light of the corresponding color under the driving force of the anode 21 and the cathode. The encapsulation structure layer may include a first inorganic encapsulation layer 107, an organic encapsulation layer 108, and a second inorganic encapsulation layer 109 stacked together. The organic encapsulation layer 108 is disposed between the first inorganic encapsulation layer 107 and the second inorganic encapsulation layer 109, forming an inorganic / organic / inorganic material stacked structure, which can ensure that external moisture cannot enter the light-emitting structure layer.

[0079] In an exemplary embodiment, in a direction perpendicular to the plane of the display substrate, the encapsulation area of ​​the border region 200 of the display substrate in this embodiment may include a first organic dielectric layer 102 disposed on a substrate 101, a second organic dielectric layer 103 disposed on the side of the first organic dielectric layer 102 away from the substrate 101, a third organic dielectric layer 104 disposed on the side of the second organic dielectric layer 103 away from the substrate 101, an isolation structure layer disposed on the side of the third organic dielectric layer 104 away from the substrate 101, and a first inorganic encapsulation layer 107, an organic encapsulation layer 108, and a second inorganic encapsulation layer 109 sequentially disposed on the side of the isolation structure layer away from the substrate 101. The isolation structure layer includes a first isolation wall 105-1 and a second isolation wall 105-2 disposed on the side of the third organic dielectric layer 104 away from the substrate 101, with the first isolation wall 105-1 located on the side of the second isolation wall 105-2 closer to the display area 100. The first isolation wall 105-1 and the second isolation wall 105-2 are used to hinder the flow of the organic encapsulation layer 108 material, reduce the ramping ability of the organic encapsulation layer 108 material, prevent the overflow of the organic encapsulation layer 108 material, and ensure the encapsulation effect.

[0080] In an exemplary embodiment, the encapsulation area of ​​the border region 200 is provided with a first sub-flow blocking region 11, a second sub-flow blocking region 12, a third sub-flow blocking region 13, and a plurality of first isolation grooves 106-1 between the first isolation wall 105-1 and the second isolation wall 105-2. The plurality of first isolation grooves 106-1 are located on the side of the first sub-flow blocking region 11, the second sub-flow blocking region 12, and the third sub-flow blocking region 13 away from the display area 100. The first sub-flow blocking region 11, the second sub-flow blocking region 12, and the third sub-flow blocking region 13 are used to impede the flow of the organic encapsulation layer 108 material, reduce the ramp-up capability of the organic encapsulation layer 108 material, prevent the overflow of the organic encapsulation layer 108 material, and ensure the encapsulation effect. The plurality of first isolation grooves 106-1 are used to isolate conductive materials (e.g., organic light-emitting layer materials) extending from the display area.

[0081] In an exemplary embodiment, the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 are all strip-shaped groove structures. The extending direction of the strip-shaped groove structure is approximately the same as the extending direction of the inner contour 230-2 at the corner. The cross-sectional shape of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 in the direction perpendicular to the plane of the display substrate is an inverted trapezoid. The first sub-blocking region 11 extends from the surface of the third organic dielectric layer 104 away from the substrate 101, through the third organic dielectric layer 104, to the surface of the second organic dielectric layer 103 away from the substrate 101. The second sub-blocking region 12 extends from the surface of the third organic dielectric layer 104 away from the substrate 101, through the third organic dielectric layer 104 and the second organic dielectric layer 103 in sequence, to the surface of the first organic dielectric layer 102 away from the substrate 101. The third sub-blocking region 13 extends from the surface of the third organic dielectric layer 104 away from the substrate 101, through the third organic dielectric layer 104, the second organic dielectric layer 103 and the first organic dielectric layer 102, to the surface of the substrate 101 near the encapsulation structure layer.

[0082] The embodiments disclosed herein show that the substrate, through the strip groove structure of the first sub-blocking region 11, the second sub-blocking region 12 and the third sub-blocking region 13, can increase the ramp distance of the organic encapsulation layer 108 material and can accommodate part of the organic encapsulation layer 108 material, thereby hindering the flow of the organic encapsulation layer 108 material.

[0083] In some embodiments, the groove depth of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 to impede the flow of the organic encapsulation layer 108 material along the inner corner contour 230-2 toward the outer corner contour 230-1 to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region 230 near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region and solving the problem of corner brightness on the display substrate. The groove depth of the strip structure refers to the maximum dimension of the strip structure on the plane perpendicular to the display substrate.

[0084] In some embodiments, the groove width of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 to impede the flow of organic encapsulation layer 108 material along the inner corner contour 230-2 toward the outer corner contour 230-1 to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region 230 near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region and solving the problem of corner brightness on the display substrate. The groove width of the strip groove structure refers to the distance between the outer and inner contours of the strip groove structure. The outer contour of the strip groove structure refers to the contour of the edge of the strip groove structure away from the display area, and the inner contour of the strip groove structure refers to the contour of the edge of the strip groove structure close to the display area.

[0085] In some embodiments, at least one of the groove depth and groove width of the strip groove structure in the first sub-obstruction region 11, the second sub-obstruction region 12, and the third sub-obstruction region 13 gradually increases along the inner corner contour 230-2 toward the outer corner contour 230-1. That is, at least one of the groove depth and groove width of the strip groove structure in the first sub-obstruction region 11 is less than at least one of the groove depth and groove width of the strip groove structure in the second sub-obstruction region 12, and at least one of the groove depth and groove width of the strip groove structure in the second sub-obstruction region 12 is less than at least one of the groove depth and groove width of the strip groove structure in the third sub-obstruction region 13.

[0086] In some embodiments, at least one of the groove depth and groove width of the strip structure in the first sub-obstruction region, the second sub-obstruction region, and the third sub-obstruction region gradually decreases along the inner contour of the corner towards the outer contour of the corner. Further details are omitted here.

[0087] In an exemplary embodiment, the side of the first sub-blocking area 11 near the display area 100 is connected to the side of the second sub-blocking area 12 away from the display area 100 to form a single unit. The side of the second sub-blocking area 12 near the display area 100 is connected to the side of the third sub-blocking area 13 away from the display area 100 to form a single unit. This results in the bottom walls of the first sub-blocking area 11, the second sub-blocking area 12, and the third sub-blocking area 13 forming a stepped structure that extends along the inner contour 230-2 of the corner towards the outer contour 230-1 of the corner.

[0088] In an exemplary embodiment, the shape of the cross section of the plurality of first isolation trenches 106-1 in the direction perpendicular to the plane of the display substrate is a trapezoid. The plurality of first isolation trenches 106-1 extend from the surface of the third organic dielectric layer 104 away from the substrate 101, through the third organic dielectric layer 104, to the surface of the second organic dielectric layer 103 away from the substrate 101.

[0089] In an exemplary embodiment, the encapsulation area of ​​the bezel region 200 has a plurality of second isolation grooves 106-2 on the side of the second isolation wall 105-2 away from the first isolation wall 105-1. The plurality of second isolation grooves 106-2 are used to isolate conductive materials (e.g., organic light-emitting layer materials) extending from the display area. All of the plurality of second isolation grooves 106-2 have a trapezoidal cross-sectional shape in a direction perpendicular to the plane of the display substrate. The plurality of second isolation grooves 106-2 extend from the surface of the third organic dielectric layer 104 away from the substrate 101, through the third organic dielectric layer 104, to the surface of the second organic dielectric layer 103 away from the substrate 101.

[0090] In an exemplary embodiment, both the first inorganic encapsulation layer 107 and the second inorganic encapsulation layer 109 cover the first isolation wall 105-1, the first sub-flow blocking region 11, the second sub-flow blocking region 12, the third sub-flow blocking region 13, a plurality of first isolation trenches 106-1, the second isolation wall 105-2, and a plurality of second isolation trenches 106-2. The organic encapsulation layer 108 covers the first isolation wall 105-1, the first sub-flow blocking region 11, the second sub-flow blocking region 12, the third sub-flow blocking region 13, and the plurality of first isolation trenches 106-1, extending to the second isolation wall 105-2. The organic encapsulation layer 108 is blocked by the second isolation wall 105-2, so that the organic encapsulation layer 108 does not extend to the side of the second isolation wall 105-2 away from the display area 100, and the organic encapsulation layer 108 does not cover the plurality of second isolation trenches 106-2. At least a portion of the organic encapsulation layer 108 on the side closest to the substrate 101 is located within the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13. The first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 can block the flow of the organic encapsulation layer 108 material, reduce the ramp-up capability of the organic encapsulation layer 108 material, prevent the organic encapsulation layer 108 material from overflowing, and ensure the encapsulation effect.

[0091] Figure 8 is an enlarged view of the corner region of another display substrate provided in this embodiment. The structure of the corner region of the display substrate in this exemplary embodiment is basically the same as that of the corner region of the display substrate shown in Figure 5. The difference is that, as shown in Figure 8, a flow-blocking region 10 is provided on the corner region 230 in a direction parallel to the plane of the display substrate. The flow-blocking region 10 includes a first sub-flow-blocking region 11, a second sub-flow-blocking region 12, and a third sub-flow-blocking region 13. The first sub-flow-blocking region 11, the second sub-flow-blocking region 12, and the third sub-flow-blocking region 13 are arranged sequentially at intervals along the outer contour of the corner of the corner region 230 toward the inner contour of the corner of the corner region 230. A first interval region is provided between the first sub-flow-blocking region 11 and the second sub-flow-blocking region 12, and a second interval region is provided between the second sub-flow-blocking region 12 and the third sub-flow-blocking region 13.

[0092] Figure 9a is a schematic cross-sectional view of the central region of a corner area in another display substrate provided in this embodiment. Figure 9a can be a cross-sectional view along the B2-B2' direction in Figure 8. The cross-sectional structure of the corner area of ​​the display substrate in this exemplary embodiment is substantially the same as that of the corner area of ​​the display substrate in the embodiment shown in Figure 7a. The difference is that, as shown in Figure 9a, in a direction perpendicular to the plane of the display substrate, a first spacing region 31 is provided between the side of the first sub-blocking region 11 near the display area 100 and the side of the second sub-blocking region 12 away from the display area 100. The first spacing region 31 includes a first organic dielectric layer 102, a second organic dielectric layer 103, and a third organic dielectric layer 104 stacked together. A second spacing region 32 is provided between the side of the second sub-blocking region 12 near the display area 100 and the side of the third sub-blocking region 13 away from the display area 100. The second spacing region 32 includes a first organic dielectric layer 102, a second organic dielectric layer 103, and a third organic dielectric layer 104 stacked together.

[0093] Figure 9b is a schematic cross-sectional view of the second edge region of the corner area in another display substrate provided in this embodiment. Figure 9b can be a cross-sectional view along the C2-C2' direction in Figure 8. The cross-sectional structure of the corner area of ​​the display substrate in this exemplary embodiment is substantially the same as that of the corner area of ​​the display substrate in the embodiment shown in Figure 7b. The difference is that, as shown in Figure 9b, a first spacing region 31 is provided between the side of the first sub-blocking region 11 near the display area 100 and the side of the second sub-blocking region 12 away from the display area 100 in a direction perpendicular to the plane of the display substrate. The first spacing region 31 includes a first organic dielectric layer 102, a second organic dielectric layer 103, and a third organic dielectric layer 104 stacked together.

[0094] This embodiment of the display substrate, through the strip-shaped groove structure of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13, can increase the ramp distance of the organic encapsulation layer 108 material, so that the ramp distance of the organic encapsulation layer 108 material gradually increases along the direction close to the axis of symmetry O; and, the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 can accommodate part of the organic encapsulation layer 108 material, so that the blocking region 10 can effectively reduce the ramp ability of the organic encapsulation layer 108 material in the direction close to the axis of symmetry O, avoid the overflow of the organic encapsulation layer material in the corner region 230 near the axis of symmetry O, ensure the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region, and solve the problem of corner brightness of the display substrate.

[0095] Figure 10 is an enlarged view of the corner region of another display substrate provided in this embodiment. The structure of the corner region of the display substrate in this exemplary embodiment is basically the same as that of the corner region of the display substrate shown in Figure 8. The difference is that, as shown in Figure 10, a flow-blocking region 10 is provided on the corner region 230 in a direction parallel to the plane of the display substrate. The flow-blocking region 10 includes a first sub-flow-blocking region 11, a second sub-flow-blocking region 12, and a third sub-flow-blocking region 13. The first sub-flow-blocking region 11, the second sub-flow-blocking region 12, and the third sub-flow-blocking region 13 are arranged sequentially at intervals along the outer contour of the corner of the corner region 230 toward the inner contour of the corner of the corner region 230. A first interval region is provided between the first sub-flow-blocking region 11 and the second sub-flow-blocking region 12, and a second interval region is provided between the second sub-flow-blocking region 12 and the third sub-flow-blocking region 13. The first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 each include a plurality of through holes 40, which are configured to impede the flow of organic encapsulation layer material along the inner corner contour 230-2 toward the outer corner contour 230-1.

[0096] In an exemplary embodiment, the density of vias 40 in at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 to impede the flow of organic encapsulation layer 108 material along the inner corner contour 230-2 toward the outer corner contour 230-1 to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region 230 near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region and solving the problem of corner brightness on the display substrate. The density of vias 40 refers to the number of vias 40 per unit area of ​​the sub-blocking region.

[0097] In an exemplary embodiment, the vias 40 in the first sub-flow blocking region 11 are circular in shape when projected onto the display substrate plane, and the opening areas of the plurality of vias 40 in the first sub-flow blocking region 11 are approximately the same. Similarly, the vias 40 in the second sub-flow blocking region 12 are circular in shape when projected onto the display substrate plane, and the opening areas of the plurality of vias 40 in the second sub-flow blocking region 12 are approximately the same. The vias 40 in the third sub-flow blocking region 13 are also circular in shape when projected onto the display substrate plane, and the opening areas of the plurality of vias 40 in the third sub-flow blocking region 13 are approximately the same. The opening areas of the vias 40 in the first sub-flow blocking region 11, the second sub-flow blocking region 12, and the third sub-flow blocking region 13 are approximately the same. Here, the opening area of ​​a via 40 refers to the area of ​​the via 40 projected onto the plane of the display substrate from the side of the via 40 furthest from the substrate.

[0098] In some embodiments, the opening area of ​​the via in at least one of the first, second, and third sub-blocking regions gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first, second, and third sub-blocking regions to impede the flow of organic encapsulation layer material along the inner contour of the corner toward the outer contour of the corner to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer in the corner region and solving the problem of corner brightness on the display substrate.

[0099] In an exemplary embodiment, the depths of the plurality of through holes 40 in the first sub-blocking region 11 are approximately the same, the depths of the plurality of through holes 40 in the second sub-blocking region 12 are approximately the same, and the depths of the plurality of through holes 40 in the third sub-blocking region 13 are approximately the same. The depths of the through holes 40 in the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 are approximately the same. Here, the depth of the through hole 40 refers to the maximum dimension of the through hole 40 on the plane perpendicular to the display substrate.

[0100] In some embodiments, the depth of the via in at least one of the first, second, and third sub-blocking regions gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first, second, and third sub-blocking regions to impede the flow of organic encapsulation layer material along the inner contour of the corner toward the outer contour of the corner to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer in the corner region and solving the problem of corner brightness on the display substrate.

[0101] In an exemplary embodiment, at least one of the density, depth, and opening area of ​​the through holes 40 in the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 gradually decreases along the inner corner contour 230-2 toward the outer corner contour 230-1. That is, at least one of the density, depth, and opening area of ​​the through holes 40 in the first sub-blocking region 11 is less than at least one of the density, depth, and opening area of ​​the through holes 40 in the second sub-blocking region 12, and at least one of the density, depth, and opening area of ​​the through holes 40 in the second sub-blocking region 12 is less than at least one of the density, depth, and opening area of ​​the through holes 40 in the third sub-blocking region 13.

[0102] In some embodiments, at least one of the density, depth, and opening area of ​​the through holes in the first sub-blocking region, the second sub-blocking region, and the third sub-blocking region gradually increases along the inner contour of the corner towards the outer contour of the corner. Further details are omitted here.

[0103] Figure 11a is a cross-sectional view of the central region of a corner area in another display substrate provided in an embodiment of the present disclosure; Figure 11b is a cross-sectional view of the second edge region of a corner area in another display substrate provided in an embodiment of the present disclosure; Figure 11c is a cross-sectional view of the first edge region of a corner area in another display substrate provided in an embodiment of the present disclosure. Figure 11a can be a cross-sectional view along the B3-B3' direction in Figure 10, Figure 11b can be a cross-sectional view along the C3-C3' direction in Figure 10, and Figure 11c can be a cross-sectional view along the D3-D3' direction in Figure 10. As shown in Figures 11a, 11b, and 11c, in the direction perpendicular to the plane of the display substrate, the through-holes 40 in the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 all have an inverted trapezoidal cross-sectional shape in the direction perpendicular to the plane of the display substrate. The through-holes 40 in the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 all extend from the surface of the third organic dielectric layer 104 away from the substrate 101, sequentially penetrating the third organic dielectric layer 104, the second organic dielectric layer 103, and the first organic dielectric layer 102, and extend to the surface of the substrate 101 near the encapsulation structure layer. The hole depths of the through-holes 40 in the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 are approximately the same.

[0104] In this embodiment of the display substrate, the multiple vias 40 of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 can increase the ramp distance of the organic encapsulation layer 108 material, so that the ramp distance of the organic encapsulation layer 108 material gradually increases along the direction close to the axis of symmetry O. Furthermore, the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 can accommodate a portion of the organic encapsulation layer 108 material, so that the blocking region 10 can effectively reduce the ramp ability of the organic encapsulation layer 108 material in the direction close to the axis of symmetry O, avoid the overflow of the organic encapsulation layer material in the corner region 230 near the axis of symmetry O, ensure the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region, and solve the problem of corner brightness of the display substrate.

[0105] Figure 12 is an enlarged view of the corner region of another display substrate provided in this embodiment. Figure 12 can be an enlarged view of point a in Figure 4. The structure of the corner region of the display substrate in this exemplary embodiment is basically the same as that of the corner region of the display substrate shown in Figure 5. The difference is that, as shown in Figure 12, a flow-blocking region 10 is provided on the corner region 230 in a direction parallel to the plane of the display substrate. The flow-blocking region 10 includes a first sub-flow-blocking region 11, a second sub-flow-blocking region 12, and a third sub-flow-blocking region 13. The first sub-flow-blocking region 11, the second sub-flow-blocking region 12, and the third sub-flow-blocking region 13 are arranged sequentially along the outer contour of the corner region 230 toward the inner contour of the corner region 230. The inner contour of the first sub-flow-blocking region 11 is connected to the outer contour of the second sub-flow-blocking region 12, and the inner contour of the second sub-flow-blocking region 12 is connected to the outer contour of the third sub-flow-blocking region 13. The first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 each include a plurality of blocking grooves spaced apart along the extension direction of the inner corner contour 230-2. The plurality of blocking grooves are configured to impede the flow of organic encapsulation layer material along the inner corner contour 230-2 toward the outer corner contour 230-1.

[0106] Figure 13 is a partially enlarged view of the first sub-blocking region, the second sub-blocking region, and the third sub-blocking region of another display substrate provided in an embodiment of this disclosure. Figure 13 can be an enlarged view of point b in Figure 12. In an exemplary embodiment, as shown in Figure 13, the blocking groove includes a straight groove 51 and an arcuate groove 52 connected to the side of the straight groove 51 in a direction parallel to the plane of the display substrate. The straight groove 51 extends along the inner contour 230-2 of the corner towards the outer contour 230-1 of the corner. Multiple arcuate grooves 52 are connected to opposite sides of the straight groove 51, and the multiple arcuate grooves 52 on the same side of the straight groove 51 are spaced apart along the extending direction of the straight groove 51. The arc-shaped groove 52 protrudes towards the display area, and the two ends of the arc-shaped groove 52 are respectively connected to different positions on the same side of the straight groove 51 to form an arc-shaped channel that communicates with the straight groove 51. This arc-shaped channel utilizes the Tesla valve principle to provide resistance to the organic encapsulation layer material, thereby reducing the flow capacity of the organic encapsulation layer material along the inner contour of the corner towards the outer contour of the corner.

[0107] In an exemplary embodiment, in the region of the first sub-flow blocking region 11, the second sub-flow blocking region 12, and the third sub-flow blocking region 13 adjacent to each other in the flow blocking region 10, the straight grooves 51 of the first sub-flow blocking region 11, the second sub-flow blocking region 12, and the third sub-flow blocking region 13 are connected to form a first straight-line structure extending along the inner contour of the corner towards the outer contour of the corner. The arc-shaped grooves 52 of the first sub-flow blocking region 11, the second sub-flow blocking region 12, and the third sub-flow blocking region 13 are arranged at intervals along the extension direction of the first straight-line structure. In the region of the first sub-flow blocking region 11 and the second sub-flow blocking region 12 adjacent to each other in the flow blocking region 10, the straight grooves 51 of the first sub-flow blocking region 11 and the second sub-flow blocking region 12 are connected to form a second straight-line structure extending along the inner contour of the corner towards the outer contour of the corner. The arc-shaped grooves 52 of the first sub-flow blocking region 11 and the second sub-flow blocking region 12 are arranged at intervals along the extension direction of the second straight-line structure.

[0108] In an exemplary embodiment, the density of the straight grooves 51 in at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 to impede the flow of the organic encapsulation layer 108 material along the inner corner contour 230-2 toward the outer corner contour 230-1 to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region 230 near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region and solving the problem of corner brightness on the display substrate. The density of the straight grooves 51 refers to the number of straight grooves 51 per unit area of ​​the sub-blocking region.

[0109] In an exemplary embodiment, the groove depth of the straight groove 51 in at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 to impede the flow of the organic encapsulation layer 108 material along the inner corner contour 230-2 toward the outer corner contour 230-1 to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region 230 near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region and solving the problem of corner brightness on the display substrate. The groove depth of the straight groove 51 refers to the maximum dimension of the straight groove 51 on the plane perpendicular to the display substrate.

[0110] In an exemplary embodiment, the width of the straight groove 51 in at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 to impede the flow of the organic encapsulation layer 108 material along the inner contour 230-2 of the corner towards the outer contour 230-1 of the corner to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region 230 near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region and solving the problem of corner brightness on the display substrate. The width of the straight groove 51 refers to the distance between the outer and inner contours of the straight groove 51.

[0111] In some embodiments, at least one of the density, depth, and width of the straight grooves in the first sub-obstruction region, the second sub-obstruction region, and the third sub-obstruction region gradually decreases or increases along the inner contour of the corner towards the outer contour of the corner.

[0112] In an exemplary embodiment, the density of the arc-shaped grooves 52 in at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 to impede the flow of the organic encapsulation layer 108 material along the inner corner contour 230-2 toward the outer corner contour 230-1 to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region 230 near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region and solving the problem of corner brightness on the display substrate. The density of the arc-shaped grooves 52 refers to the number of arc-shaped grooves 52 per unit area of ​​the sub-blocking region.

[0113] In an exemplary embodiment, the depth of the arc-shaped groove 52 in at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 to impede the flow of the organic encapsulation layer 108 material along the inner corner contour 230-2 toward the outer corner contour 230-1 to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region 230 near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region and solving the problem of corner brightness on the display substrate. The depth of the arc-shaped groove 52 refers to the maximum dimension of the arc-shaped groove 52 on the plane perpendicular to the display substrate.

[0114] In an exemplary embodiment, the width of the arc-shaped groove 52 in at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 gradually increases along the direction close to the axis of symmetry O. This causes the flow-blocking capability of at least one of the first sub-blocking region 11, the second sub-blocking region 12, and the third sub-blocking region 13 to impede the flow of the organic encapsulation layer 108 material along the inner contour 230-2 of the corner towards the outer contour 230-1 of the corner to gradually increase along the direction close to the axis of symmetry O. This prevents the organic encapsulation layer material from overflowing in the corner region 230 near the axis of symmetry O, ensuring the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region and solving the problem of corner brightness on the display substrate. The width of the arc-shaped groove 52 refers to the distance between the outer and inner contours of the arc-shaped groove 52.

[0115] In some embodiments, at least one of the density, depth, and width of the arcuate grooves in the first sub-obstruction region, the second sub-obstruction region, and the third sub-obstruction region gradually decreases or increases along the inner contour of the corner towards the outer contour of the corner.

[0116] Figure 14a is a cross-sectional view of an arc-shaped groove in a flow-blocking channel of another display substrate provided in this embodiment of the present disclosure. Figure 14a can be a cross-sectional view along line E-E' in Figure 13. In an exemplary embodiment, as shown in Figure 14a, the arc-shaped groove 52 has an inverted trapezoidal cross-section in the direction perpendicular to the display substrate plane. The arc-shaped groove 52 extends from the surface of the third organic dielectric layer 104 away from the substrate 101, sequentially penetrating the third organic dielectric layer 104, the second organic dielectric layer 103, and the first organic dielectric layer 102, to the surface of the substrate 101 near the encapsulation structure layer.

[0117] Figure 14b is a schematic cross-sectional view of a straight groove in a flow-blocking channel of a display substrate provided in another embodiment of this disclosure. Figure 14b can be a cross-sectional view along line F-F' in Figure 13. In an exemplary embodiment, as shown in Figure 14b, the straight groove 51 has an inverted trapezoidal cross-section in the direction perpendicular to the display substrate plane. The straight groove 51 extends from the surface of the third organic dielectric layer 104 away from the substrate 101, sequentially penetrating the third organic dielectric layer 104, the second organic dielectric layer 103, and the first organic dielectric layer 102, to the surface of the substrate 101 near the encapsulation structure layer. The depth of the straight groove 51 is approximately the same as the depth of the arc-shaped groove 52.

[0118] This embodiment of the display substrate shows that the flow-blocking grooves of the first sub-flow-blocking region 11, the second sub-flow-blocking region 12, and the third sub-flow-blocking region 13 can increase the ramp distance of the organic encapsulation layer 108 material, so that the ramp distance of the organic encapsulation layer 108 material gradually increases along the direction close to the axis of symmetry O; and the first sub-flow-blocking region 11, the second sub-flow-blocking region 12, and the third sub-flow-blocking region 13 can accommodate part of the organic encapsulation layer 108 material, so that the flow-blocking region 10 can effectively reduce the ramp ability of the organic encapsulation layer 108 material in the direction close to the axis of symmetry O, avoid the overflow of the organic encapsulation layer material in the corner region 230 near the axis of symmetry O, ensure the uniformity of the film thickness of the organic encapsulation layer 108 in the corner region, and solve the problem of corner brightness of the display substrate.

[0119] This disclosure also provides a display device, which includes the aforementioned display substrate. The display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator, and the embodiments of the present invention are not limited thereto.

[0120] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0121] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of those features.

[0122] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0123] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0124] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0125] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0126] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A display substrate, characterized in that, include: A display area and a border area surrounding the display area; the display area includes an encapsulation structure layer disposed on a substrate, the encapsulation structure layer including an organic encapsulation layer, the border area including at least one corner area, the at least one corner area having an inner corner contour and an outer corner contour, the at least one corner area having an axis of symmetry extending along the inner corner contour toward the outer corner contour, the at least one corner area including a flow-blocking area, the organic encapsulation layer covering at least a portion of the flow-blocking area, the flow-blocking area being configured to impede the flow of the organic encapsulation layer material along the inner corner contour toward the outer corner contour, the flow-blocking area including at least one sub-flow-blocking area, the ability of the at least one sub-flow-blocking area to impede the flow of the organic encapsulation layer material gradually increasing along a direction close to the axis of symmetry.

2. The display substrate according to claim 1, characterized in that, The at least one sub-blocking region is a strip groove structure. The extension direction of the strip groove structure is approximately the same as the extension direction of the inner contour of the corner. At least one of the groove depth and groove width of the strip groove structure gradually increases along the direction close to the axis of symmetry. The groove depth of the strip groove structure refers to the maximum dimension of the strip groove structure on the plane perpendicular to the display substrate. The groove width of the strip groove structure refers to the distance between the outer contour and the inner contour of the strip groove structure.

3. The display substrate according to claim 2, characterized in that, The flow obstruction area includes a plurality of sub-flow obstruction areas, which are arranged sequentially along the inner contour of the corner toward the outer contour of the corner. At least one of the groove depth and groove width of at least some of the sub-flow obstruction areas gradually decreases or increases along the inner contour of the corner toward the outer contour of the corner.

4. The display substrate according to claim 1, characterized in that, The at least one sub-blocking region includes a plurality of through holes arranged at intervals. At least one of the density, depth, and opening area of ​​the through holes gradually increases along a direction close to the axis of symmetry. The density of the through holes refers to the number of through holes per unit area of ​​the sub-blocking region. The depth of the through holes refers to the maximum size of the through holes on the plane perpendicular to the display substrate. The opening area of ​​the through holes refers to the area of ​​the through holes projected onto the plane of the display substrate from the side away from the substrate.

5. The display substrate according to claim 4, characterized in that, The flow-blocking region includes a plurality of sub-flow-blocking regions, which are arranged sequentially along the inner contour of the corner toward the outer contour of the corner. At least some of the sub-flow-blocking regions have at least one of the density, depth and opening area of ​​the through holes, which gradually decreases or increases along the inner contour of the corner toward the outer contour of the corner.

6. The display substrate according to claim 1, characterized in that, The at least one sub-blocking region includes a plurality of blocking grooves spaced apart along the extension direction of the inner contour of the corner. Each blocking groove includes a straight groove and an arc-shaped groove connected to at least one side of the straight groove. The straight groove extends along the inner contour of the corner toward the outer contour of the corner. Both ends of the arc-shaped groove are connected to one side of the straight groove. The arc-shaped grooves are spaced apart along the extension direction of the straight grooves and protrude toward the display area. At least one of the density, depth, and width of the straight grooves gradually increases along a direction close to the axis of symmetry. The density of the straight grooves refers to the number of straight grooves in the sub-blocking region. The number of arc grooves per unit area, the groove depth of the straight groove refers to the maximum size of the straight groove on the plane perpendicular to the display substrate, the groove width of the straight groove refers to the distance between the outer contour and the inner contour of the straight groove; and / or, at least one of the density, groove depth and groove width of the arc groove gradually increases along the direction close to the axis of symmetry, the density of the arc groove refers to the number of arc grooves per unit area in the sub-blocking region, the groove depth of the arc groove refers to the maximum size of the arc groove on the plane perpendicular to the display substrate, and the groove width of the arc groove refers to the distance between the outer contour and the inner contour of the arc groove.

7. The display substrate according to claim 6, characterized in that, The flow obstruction zone includes a plurality of sub-flow obstruction zones, which are arranged sequentially along the inner contour of the corner towards the outer contour of the corner. At least some of the sub-flow obstruction zones have at least one of the density, depth, and width of the straight grooves, which gradually decrease or increase along the inner contour of the corner towards the outer contour of the corner; and / or, at least some of the density, depth, and width of the arcuate grooves in the plurality of sub-flow obstruction zones have at least one of the density, depth, and width of the arcuate grooves, which gradually decrease or increase along the inner contour of the corner towards the outer contour of the corner.

8. The display substrate according to claim 6, characterized in that, The flow-blocking area includes multiple sub-flow-blocking areas, which are arranged sequentially along the inner contour of the corner toward the outer contour of the corner. The straight grooves of at least some adjacent sub-flow-blocking areas are connected to form a single unit, creating a straight structure extending along the inner contour of the corner toward the outer contour of the corner.

9. The display substrate according to any one of claims 1 to 8, characterized in that, The flow-blocking area includes multiple sub-flow-blocking areas, which are arranged sequentially along the inner contour of the corner towards the outer contour of the corner. The multiple sub-flow-blocking areas are strip-shaped, and their extension directions are approximately the same as the extension direction of the inner contour of the corner. The number of the multiple sub-flow-blocking areas arranged along the inner contour of the corner towards the outer contour of the corner gradually increases along the direction close to the axis of symmetry.

10. The display substrate according to claim 9, characterized in that, The extension length of the plurality of sub-obstruction regions gradually increases or decreases along the inner contour of the corner toward the outer contour of the corner, and the two ends of one of the adjacent sub-obstruction regions extend from the two ends of the other of the adjacent sub-obstruction regions.

11. The display substrate according to any one of claims 1 to 8, characterized in that, The outer contour of the corner includes at least a first arc segment that protrudes in a direction away from the display area, and the inner contour of the corner includes at least a second arc segment that protrudes in a direction away from the display area. The at least one sub-blocking area includes an arc-shaped portion that protrudes in a direction away from the display area, and the curvature of the arc-shaped portion is approximately the same as that of at least one of the first arc segment and the second arc segment.

12. The display substrate according to any one of claims 1 to 8, characterized in that, The flow-blocking area includes a plurality of sub-flow-blocking areas, which are arranged sequentially along the inner contour of the corner toward the outer contour of the corner, and at least some of the adjacent sub-flow-blocking areas are connected to each other to form a whole; and / or, at least some of the adjacent sub-flow-blocking areas are spaced apart.

13. The display substrate according to any one of claims 1 to 8, characterized in that, The outer contour of the corner includes at least a first arc segment protruding along a direction away from the display area, and the inner contour of the corner includes at least a second arc segment protruding along a direction away from the display area. The flow-blocking area has a flow-blocking outer contour, a flow-blocking inner contour, and an end contour connecting the flow-blocking outer contour and the flow-blocking inner contour. The flow-blocking outer contour includes at least a third arc segment, which protrudes along a direction away from the display area and is disposed opposite to the first arc segment of the outer contour of the corner. The flow-blocking inner contour includes at least a fourth arc segment, which protrudes along a direction away from the display area and is disposed opposite to the second arc segment of the inner contour of the corner. The end contour is a stepped structure extending along the inner contour of the corner toward the outer contour of the corner.

14. The display substrate according to any one of claims 1 to 8, characterized in that, The corner area includes a first isolation wall and a second isolation wall. The first isolation wall is located on the side of the second isolation wall closer to the display area, and the flow-blocking area is provided between the first isolation wall and the second isolation wall.

15. A display device, characterized in that, Includes the display substrate according to any one of claims 1 to 14.

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