Display substrate and display device

Abstract

The invention discloses a display substrate and a display device. The display substrate includes sub-pixels, a pixel defining pattern, an isolation layer, and an insulating layer. The pixel defining pattern includes a first opening exposing the first electrode of the sub-pixel, a second opening exposing the second electrode of the sub-pixel, and a pixel defining portion. The isolation layer and the insulating layer are located between the first electrode and the substrate. The insulating layer comprises a groove located between the adjacent sub-pixels, the groove comprises a first edge exposed by the second opening, and the isolation layer comprises a first protruding part protruding relative to the first edge so as to isolate the light-emitting function layer; the adjacent sub-pixels comprise a first sub-pixel and a second sub-pixel of which the luminous efficiency is greater than that of the first sub-pixel, the isolation layer comprises a first isolation part overlapped with the first sub-pixel and a second isolation part overlapped with the second sub-pixel, and the first isolation part comprises a first protruding part; the notch of the groove comprises a second edge, and the second isolation part comprises a second protruding part which protrudes relative to the second edge and is covered by the pixel limiting part, so that the smear phenomenon of the second sub-pixel is relieved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a display substrate and a display device. Background Art

[0002] An organic light-emitting diode (OLED) display device has advantages such as rich colors, fast response time, and foldability. An organic light-emitting display device with a tandem structure improves the lifespan and brightness of the light-emitting device by adding at least one light-emitting layer and a charge generation layer in the device, which is beneficial to improving the standby time and service life of the display device. Summary of the Invention

[0003] The present disclosure provides a display substrate and a display device.

[0004] Embodiments of the present disclosure provide a display substrate, including: a substrate and a plurality of sub-pixels, a pixel defining pattern, an isolation layer, and an insulating layer located on the substrate. Each of at least some of the sub-pixels includes a first electrode, a light-emitting functional layer, and a second electrode stacked, the first electrode being located between the light-emitting functional layer and the substrate, and the light-emitting functional layer including a plurality of film layers; the pixel defining pattern is located on a side of the first electrode away from the substrate, the pixel defining pattern includes a plurality of first openings, a plurality of second openings, and a pixel defining portion surrounding the plurality of first openings and the plurality of second openings, the plurality of first openings being configured to expose the first electrodes of the plurality of sub-pixels; the isolation layer is located between the first electrode and the substrate; the insulating layer is located between the isolation layer and the substrate. The insulating layer includes a groove between adjacent sub-pixels, a notch of the groove includes a first edge exposed by the second opening, the isolation layer includes a first protruding portion protruding relative to the first edge, the first protruding portion being configured to block at least one layer of the light-emitting functional layer; the adjacent sub-pixels include a first sub-pixel and a second sub-pixel, a luminous efficiency of the first sub-pixel is less than a luminous efficiency of the second sub-pixel, the isolation layer includes a first isolation portion and a second isolation portion, the first isolation portion overlaps with the first electrode of the first sub-pixel, the second isolation portion overlaps with the first electrode of the second sub-pixel, the first isolation portion includes the first protruding portion; the notch of the groove includes a second edge, the second isolation portion includes a second protruding portion protruding relative to the second edge, and the pixel defining portion covers the second protruding portion and a part of the groove.

[0005] For example, according to an embodiment of the present disclosure, both the light-emitting functional layer and the second electrode are disconnected at the edge of the first protrusion. The light-emitting functional layer includes a charge generation layer. The charge generation layer and the second electrode are in contact on a side of the first protrusion away from the substrate, and the charge generation layer and the second electrode are spaced apart on a side of the first protrusion close to the substrate.

[0006] For example, according to an embodiment of the present disclosure, both the light-emitting functional layer and the second electrode are disconnected at the edge of the first protrusion, and the ratio of the distance between the adjacent first openings configured to define the light-emitting regions of the adjacent sub-pixels to the edge of the first protrusion is 0.95 to 1.05.

[0007] For example, according to an embodiment of the present disclosure, both the light-emitting functional layer and the second electrode are disconnected at the edge of the first protrusion, and the adjacent first openings configured to define the light-emitting regions of the adjacent sub-pixels include a first sub-opening and a second sub-opening. The first sub-opening is configured to define the light-emitting region of the first sub-pixel, and the second sub-opening is configured to define the light-emitting region of the second sub-pixel. The distance between the first sub-opening and the edge of the first protrusion is greater than the distance between the second sub-opening and the edge of the first protrusion.

[0008] For example, according to an embodiment of the present disclosure, the adjacent first openings configured to define the light-emitting regions of the adjacent sub-pixels include a first sub-opening and a second sub-opening. The second opening between the first sub-opening and the second sub-opening is at distances of a first distance and a second distance from the first sub-opening and the second sub-opening respectively, and the ratio of the first distance to the second distance is 0.95 to 1.05.

[0009] For example, according to an embodiment of the present disclosure, the distance between the second opening between the first sub-opening and the second sub-opening and the first sub-opening is a first distance, and the distance between the second opening and the second sub-opening is a second distance, and the first distance is greater than the second distance.

[0010] For example, according to an embodiment of the present disclosure, the first sub-pixel includes a blue sub-pixel, and the second sub-pixel includes a green sub-pixel.

[0011] An embodiment of the present disclosure provides a display substrate, comprising: a base substrate and a plurality of sub-pixels, a pixel defining pattern, an isolation layer and an insulating layer located on the base substrate. Each sub-pixel in at least some of the sub-pixels comprises a first electrode, a light-emitting functional layer and a second electrode arranged in a stacked manner, wherein the first electrode is located between the light-emitting functional layer and the base substrate, and the light-emitting functional layer comprises a plurality of film layers; the pixel defining pattern is located on a side of the first electrode away from the base substrate, the pixel defining pattern comprises a plurality of first openings, a plurality of second openings and a pixel defining portion surrounding the plurality of first openings and the plurality of second openings, the plurality of first openings being configured to expose the first electrodes of the plurality of sub-pixels; the isolation layer is located between the first electrode and the base substrate; and the insulating layer is located between the isolation layer and the base substrate. The insulating layer includes a groove located between adjacent sub-pixels, and the adjacent sub-pixels include a first sub-pixel and a second sub-pixel. The isolation layer includes a first isolation portion and a second isolation portion, the first isolation portion overlaps with the first electrode of the first sub-pixel, and the second isolation portion overlaps with the first electrode of the second sub-pixel. The first isolation portion includes a first protrusion protruding relative to the edge of the notch of the groove, and the second isolation portion includes a second protrusion protruding relative to the edge of the notch. The first protrusion and the second protrusion are both configured to isolate at least one layer of the light-emitting functional layer; the second opening exposes at least a portion of the groove, and along the arrangement direction of the adjacent sub-pixels, a size of at least one of the first isolation portion and the second isolation portion exposed by the second opening is smaller than the distance between the first protrusion and the second protrusion.

[0012] For example, according to an embodiment of the present disclosure, the first protrusion and the second protrusion are both exposed by the second opening to separate the light-emitting functional layer and the second electrode, and along the arrangement direction, the dimensions of the first isolation portion and the second isolation portion exposed by the second opening are both smaller than the distance between the first protrusion and the second protrusion.

[0013] For example, according to an embodiment of the present disclosure, the adjacent first openings configured to define the light-emitting area of ​​the adjacent sub-pixel include a first sub-opening and a second sub-opening, the first sub-opening is configured to define the light-emitting area of ​​the first sub-pixel, the second sub-opening is configured to define the light-emitting area of ​​the second sub-pixel, and the ratio of the distance between the first sub-opening and the edge of the first protrusion to the distance between the second sub-opening and the edge of the second protrusion is 0.95 to 1.05.

[0014] For example, according to an embodiment of the present disclosure, the luminous efficiency of the first sub-pixel is less than that of the second sub-pixel. The adjacent first openings configured to define the light-emitting regions of the adjacent sub-pixels include a first sub-opening and a second sub-opening. The first sub-opening is configured to define the light-emitting region of the first sub-pixel, and the second sub-opening is configured to define the light-emitting region of the second sub-pixel. The distance between the first sub-opening and the edge of the first protrusion is greater than the distance between the second sub-opening and the edge of the second protrusion.

[0015] For example, according to an embodiment of the present disclosure, the first sub-pixel and the second sub-pixel are two different color sub-pixels among blue sub-pixels, green sub-pixels, and red sub-pixels.

[0016] For example, according to an embodiment of the present disclosure, the first sub-pixel includes a blue sub-pixel, and the second sub-pixel includes a green sub-pixel.

[0017] For example, according to an embodiment of the present disclosure, the material of the isolation layer includes an inorganic non-metallic material, the material of the insulating layer includes an organic material. The two side surfaces of the isolation layer are respectively in contact with the first electrode and the insulating layer, and the orthographic projection of the first electrode on the substrate completely lies within the orthographic projection of the isolation layer on the substrate.

[0018] For example, according to an embodiment of the present disclosure, at least one recess is provided on the surface of the pixel defining portion between the adjacent sub-pixels away from the substrate. The depth of the recess is not less than the thickness of the light-emitting functional layer, and the distance between the bottom of the recess and the substrate is greater than the distance between the surface of the first electrode away from the substrate and the substrate.

[0019] For example, according to an embodiment of the present disclosure, the at least one recess includes a plurality of recesses. Along the arrangement direction of the adjacent sub-pixels, the recesses are provided on both sides of the first protrusion between the adjacent sub-pixels.

[0020] For example, according to an embodiment of the present disclosure, the cross-section of each recess in the at least one recess intercepted by a plane parallel to the arrangement direction of the adjacent sub-pixels and perpendicular to the substrate includes two side edges and a bottom edge. Along the direction of the insulating layer away from the substrate, the distance between the two side edges gradually increases, and the angle at the connection of at least one side edge and the bottom edge is 100 to 110 degrees.

[0021] For example, according to an embodiment of the present disclosure, the thickness of the part of the light-emitting functional layer on the side wall of the at least one recess is less than the thickness of the part of the light-emitting functional layer within the first opening.

[0022] For example, according to an embodiment of the present disclosure, the orthographic projection of the bottom of the recess on the substrate substrate does not overlap with the orthographic projection of the first electrode on the substrate substrate.

[0023] For example, according to an embodiment of the present disclosure, along a direction perpendicular to the substrate substrate, the bottom of the recess overlaps with the first electrode, and the distance between the bottom of the recess and the first electrode is greater than 2000 angstroms.

[0024] For example, according to an embodiment of the present disclosure, the display substrate further includes: spacers located on a side of the pixel defining portion away from the substrate substrate, and the orthographic projection of the spacers on the substrate substrate does not overlap with the orthographic projection of the grooves on the substrate substrate.

[0025] Embodiments of the present disclosure provide a display substrate, including: a substrate substrate and a plurality of sub-pixels, a pixel defining pattern, and an insulating layer located on the substrate substrate. Each of at least some of the sub-pixels includes a first electrode, a light-emitting functional layer, and a second electrode stacked, the first electrode is located between the light-emitting functional layer and the substrate substrate, and the light-emitting functional layer includes a plurality of film layers; a pixel defining pattern located on a side of the first electrode away from the substrate substrate, the pixel defining pattern includes a plurality of first openings, a plurality of second openings, and a pixel defining portion surrounding the plurality of first openings and the plurality of second openings, the plurality of first openings are configured to expose the first electrodes of the plurality of sub-pixels; an insulating layer located between the first electrode and the substrate substrate. At least one recess is provided on a surface of the pixel defining portion between adjacent sub-pixels away from the substrate substrate, the depth of the recess is not less than the thickness of the light-emitting functional layer, and the distance between the bottom of the recess and the substrate substrate is greater than the distance between the surface of the first electrode away from the substrate substrate and the substrate substrate; a cross-section of each of the at least one recess intercepted by a plane parallel to the arrangement direction of the adjacent sub-pixels and perpendicular to the substrate substrate includes two side edges and a bottom edge, and along the direction of the insulating layer away from the substrate substrate, the distance between the two side edges gradually increases, and the angle at the connection of at least one side edge and the bottom edge is 100 to 110 degrees; the insulating layer includes grooves located between adjacent sub-pixels, and at least a part of the grooves is exposed by the second openings.

[0026] For example, according to an embodiment of the present disclosure, the display substrate further includes: an isolation layer located between the first electrode and the insulating layer, with both side surfaces of the isolation layer being in contact with the first electrode and the insulating layer respectively. The material of the isolation layer includes an inorganic non-metallic material, and the material of the insulating layer includes an organic material. The adjacent sub-pixels include a first sub-pixel and a second sub-pixel, and the luminous efficiency of the first sub-pixel is less than that of the second sub-pixel. The isolation layer includes a first isolation portion and a second isolation portion, where the first isolation portion overlaps with the first electrode of the first sub-pixel, and the second isolation portion overlaps with the first electrode of the second sub-pixel; the notch of the groove includes a first edge and a second edge disposed opposite to each other. The first isolation portion includes a first protrusion protruding relative to the first edge, and the second isolation portion includes a second protrusion protruding relative to the second edge. The pixel defining portion covers the first protrusion and the second opening exposes the second protrusion.

[0027] For example, according to an embodiment of the present disclosure, the first electrode is in contact with the insulating layer, and the material of the insulating layer includes an organic material.

[0028] For example, according to an embodiment of the present disclosure, the at least one recess includes a plurality of recesses, and the recesses are disposed on both sides of the second opening located between the adjacent sub-pixels along the arrangement direction of the adjacent sub-pixels.

[0029] For example, according to an embodiment of the present disclosure, along the arrangement direction of the adjacent sub-pixels, the notch of the groove includes a first edge and a second edge disposed opposite to each other, and the pixel defining portion covers the first edge and the second edge.

[0030] For example, according to an embodiment of the present disclosure, along the arrangement direction of the adjacent sub-pixels, the notch of the groove includes a first edge and a second edge disposed opposite to each other, and the second opening exposes at least one of the first edge and the second edge.

[0031] For example, according to an embodiment of the present disclosure, the thickness of the portion of the light-emitting functional layer on the sidewall of the at least one recess is less than the thickness of the portion of the light-emitting functional layer within the first opening.

[0032] For example, according to an embodiment of the present disclosure, the orthographic projection of the bottom of the recess on the substrate does not overlap with the orthographic projection of the first electrode on the substrate.

[0033] For example, according to an embodiment of the present disclosure, along the direction perpendicular to the substrate, the bottom of the recess overlaps with the first electrode, and the distance between the bottom of the recess and the first electrode is greater than 2000 angstroms.

[0034] An embodiment of the present disclosure provides a display device, including the display substrate in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure and do not limit the present disclosure.

[0036] Figure 1 FIG. is a partial planar structure schematic diagram of a display substrate provided as an example according to an embodiment of the present disclosure.

[0037] Figure 2 Along Figure 1 FIG. is a partial cross-sectional structure schematic diagram taken along the AA' line shown.

[0038] Figure 3 FIG. is a partial cross-sectional structure schematic diagram of a display substrate provided as another example according to an embodiment of the present disclosure.

[0039] Figure 4A 、 Figure 4B And Figure 5 FIGS. are partial cross-sectional structure schematic diagrams of display substrates provided as different examples according to an embodiment of the present disclosure.

[0040] Figure 6 FIG. is a partial planar structure schematic diagram of a display substrate provided as an example according to another embodiment of the present disclosure.

[0041] Figure 7 Along Figure 6 FIG. is a partial cross-sectional structure schematic diagram taken along the BB' line shown.

[0042] Figure 8 And Figure 9 FIGS. are partial cross-sectional structure schematic diagrams of display substrates provided as different examples according to an embodiment of the present disclosure.

[0043] Figure 10 FIG. is a partial planar structure schematic diagram of a display substrate provided as another example according to an embodiment of the present disclosure.

[0044] Figure 11 FIG. is a partial planar structure schematic diagram of a display substrate provided according to still another embodiment of the present disclosure.

[0045] Figure 12 Along Figure 11 FIG. is a partial cross-sectional structure schematic diagram taken along the CC' line shown.

[0046] Figures 13 to 15 FIGS. are partial cross-sectional structure schematic diagrams of display substrates provided as different examples according to still another embodiment of the present disclosure.

[0047] Figure 16 Schematic cross-sectional structure diagram of a partial area of a display substrate provided as another example according to another embodiment of the present disclosure.

[0048] Figure 17 Schematic block diagram of a display device provided according to another embodiment of the present disclosure. Detailed implementation manners

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0050] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", and the like used in the present disclosure do not denote any order, quantity, or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items.

[0051] Features such as "parallel", "perpendicular", and "identical" used in the embodiments of the present disclosure include the strict meanings of "parallel", "perpendicular", "identical", etc., as well as cases with certain errors such as "substantially parallel", "substantially perpendicular", and "substantially identical". Considering measurement and errors related to the measurement of a specific quantity (for example, limitations of the measurement system), it means within the acceptable deviation range for a specific value determined by those of ordinary skill in the art. For example, "substantially" can mean within one or more standard deviations, or within 10% or 5% of the value. When the quantity of a component is not specifically indicated in the following text of the embodiments of the present disclosure, it means that the component can be one or more, or can be understood as at least one. "At least one" means one or more, and "a plurality" means at least two. The "integrally arranged structure" used in the embodiments of the present disclosure means that two or more of them are formed of the same material in the same patterning process.

[0052] A single-layer organic light-emitting display device is an organic light-emitting display device that includes a light-emitting layer, also known as a Single device. Since the display life of the Single device is limited and it is difficult to meet the needs of users, Tandem technology came into being. Tandem technology is to stack and connect the two light-emitting layers of the sub-pixel in series, and set a whole layer of charge generation layer between the stacked light-emitting layers, such as a P-type doped charge generation layer P-CGL and an N-type doped charge generation layer N-CGL. Compared with a display substrate without a Tandem device, the Tandem device uses N / P-CGL as a heterojunction and connects the two light-emitting layers in series. This technology realizes the series connection of dual light-emitting devices. Under the same light-emitting intensity, it greatly reduces the light-emitting current of the light-emitting device, improves the life of the organic light-emitting element, and reduces power consumption.

[0053] During the study, the inventors of the present application found that: since the Tandem device requires at least two evaporation processes of the light-emitting material, the crosstalk problem is particularly severe. In order to alleviate the crosstalk problem, an isolation structure can be provided around the light-emitting area of ​​the sub-pixel to isolate the light-emitting functional layer. However, after the introduction of the above-mentioned isolation structure, new optical problems arise under new process conditions. For example, the display panel has a more serious smear problem under low brightness conditions. For example, at the edge of the isolation structure, in addition to the light-emitting functional layer, the cathode of the sub-pixel is also isolated, and the isolated cathode and the charge generation layer overlap, resulting in a short circuit problem in the Tandem device. For example, the total capacitance of the second layer of light-emitting devices in the Tandem device is relatively large.

[0054] The present disclosure provides a display substrate and a display device.

[0055] The display substrate provided by an embodiment of the present disclosure includes a base substrate and a plurality of sub-pixels, a pixel defining pattern, an isolation layer and an insulating layer located on the base substrate. Each sub-pixel in at least some of the sub-pixels includes a first electrode, a light-emitting functional layer and a second electrode arranged in a stacked manner, the first electrode is located between the light-emitting functional layer and the base substrate, and the light-emitting functional layer includes a plurality of film layers; the pixel defining pattern is located on a side of the first electrode away from the base substrate, the pixel defining pattern includes a plurality of first openings, a plurality of second openings and a pixel defining portion surrounding the plurality of first openings and the plurality of second openings, the plurality of first openings being configured to expose the first electrodes of the plurality of sub-pixels; the isolation layer is located between the first electrode and the base substrate; and the insulating layer is located between the isolation layer and the base substrate. The insulating layer includes a groove located between adjacent sub-pixels, the notch of the groove includes a first edge exposed by the second opening, the isolation layer includes a first protrusion protruding relative to the first edge, and the first protrusion is configured to isolate at least one layer of the light-emitting functional layer; the adjacent sub-pixels include a first sub-pixel and a second sub-pixel, the luminous efficiency of the first sub-pixel is less than the luminous efficiency of the second sub-pixel, the isolation layer includes a first isolation portion and a second isolation portion, the first isolation portion overlaps with the first electrode of the first sub-pixel, the second isolation portion overlaps with the first electrode of the second sub-pixel, and the first isolation portion includes a first protrusion; the notch of the groove includes a second edge, the second isolation portion includes a second protrusion protruding relative to the second edge, and the pixel defining portion covers the second protrusion and a portion of the groove.

[0056] In the display substrate provided by the present invention, the first protrusion in the first isolation part overlapping with the first sub-pixel with lower luminous efficiency isolates the light-emitting functional layer, and the second protrusion in the second isolation part overlapping with the second sub-pixel with higher luminous efficiency is covered by the pixel defining part, which is beneficial to alleviate the ghosting phenomenon of the second sub-pixel and improve the display effect of the display substrate.

[0057] Another embodiment of the present disclosure provides a display substrate including a substrate and a plurality of sub-pixels, a pixel defining pattern, an isolation layer, and an insulating layer located on the substrate. The plurality of sub-pixels are located on the substrate, and each of at least some of the sub-pixels includes a first electrode, a light-emitting functional layer, and a second electrode arranged in a stacked manner. The first electrode is located between the light-emitting functional layer and the substrate, and the light-emitting functional layer includes a plurality of film layers; the pixel defining pattern is located on a side of the first electrode away from the substrate, and the pixel defining pattern includes a plurality of first openings, a plurality of second openings, and a pixel defining portion surrounding the plurality of first openings and the plurality of second openings. The plurality of first openings are configured to expose the first electrodes of the plurality of sub-pixels; the isolation layer is located between the first electrode and the substrate; the insulating layer is located between the isolation layer and the substrate. The insulating layer includes a groove located between adjacent sub-pixels. The adjacent sub-pixels include a first sub-pixel and a second sub-pixel. The isolation layer includes a first isolation portion and a second isolation portion. The first isolation portion overlaps with the first electrode of the first sub-pixel, and the second isolation portion overlaps with the first electrode of the second sub-pixel. The first isolation portion includes a first protrusion protruding relative to an edge of the notch of the groove, and the second isolation portion includes a second protrusion protruding relative to the edge of the notch; at least a part of the groove is exposed by the second opening, and along the arrangement direction of the adjacent sub-pixels, a size of at least one of the first isolation portion and the second isolation portion exposed by the second opening is smaller than a distance between the first protrusion and the second protrusion.

[0058] By setting both of the two protrusions to block the light-emitting functional layer while setting the distance between the two protrusions to be greater than the size of at least one of the first isolation portion and the second isolation portion exposed by the second opening, it is possible to reduce the crosstalk between the first sub-pixel and the second sub-pixel while setting at least one of the distance between the first protrusion and the light-emitting region of the first sub-pixel and the distance between the second protrusion and the light-emitting region of the second sub-pixel to be smaller, so as to reduce the capacitance between the second electrode and the charge generation layer in at least one of the first sub-pixel and the second sub-pixel, which is beneficial to weakening the smear phenomenon generated in at least one of the first sub-pixel and the second sub-pixel.

[0059] Another embodiment of the present disclosure provides a display substrate including a substrate and a plurality of sub-pixels, a pixel defining pattern, and an insulating layer located on the substrate. The plurality of sub-pixels are located on the substrate, and each sub-pixel in at least a part of the sub-pixels includes a first electrode, a light-emitting functional layer, and a second electrode arranged in a stacked manner. The first electrode is located between the light-emitting functional layer and the substrate, and the light-emitting functional layer includes a plurality of film layers; the pixel defining pattern is located on a side of the first electrode away from the substrate, and the pixel defining pattern includes a plurality of first openings, a plurality of second openings, and a pixel defining portion surrounding the plurality of first openings and the plurality of second openings. The plurality of first openings are configured to expose the first electrodes of the plurality of sub-pixels; the insulating layer is located between the first electrode and the substrate. At least one recess is provided on a surface of the pixel defining portion between adjacent sub-pixels away from the substrate side. The depth of the recess is not less than the thickness of the light-emitting functional layer, and the distance between the bottom of the recess and the substrate is greater than the distance between the surface of the first electrode away from the substrate and the substrate; a cross-section of each recess in the at least one recess intercepted by a plane parallel to the arrangement direction of the adjacent sub-pixels and perpendicular to the substrate includes two side edges and a bottom edge. Along the direction of the insulating layer away from the substrate, the distance between the two side edges gradually increases, and the angle at the connection of at least one side edge and the bottom edge is 100 to 110 degrees; the insulating layer includes a groove located between adjacent sub-pixels, and at least a part of the groove is exposed by the second opening.

[0060] By providing a groove exposed by the second opening in the insulating layer and providing a recess in the pixel defining portion at the same time, it is beneficial to extend the path of the light-emitting functional layer and reduce crosstalk between adjacent sub-pixels.

[0061] The display substrate and the display device provided by the embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0062] Figure 1 It is a partial planar structure schematic diagram of a display substrate provided as an example according to an embodiment of the present disclosure. Figure 2 Along Figure 1 It is a partial cross-sectional structure schematic diagram intercepted along the AA' line shown.

[0063] As Figure 1 and Figure 2As shown, the display substrate includes a substrate 01, a plurality of sub-pixels 100 located on the substrate 01, a pixel defining pattern 200, an isolation layer 300, and an insulating layer 400. Each of at least some of the sub-pixels 100 includes a first electrode 110, a light-emitting functional layer 130, and a second electrode 120 which are stacked. The first electrode 110 is located between the light-emitting functional layer 130 and the substrate 01, and the light-emitting functional layer 130 includes a plurality of film layers. For example, the display substrate includes a display area and a peripheral area surrounding the display area. The plurality of sub-pixels 100 are located in the display area of the display substrate. The pixel defining pattern 200 may include a portion located in the display area and a portion located in the peripheral area. The isolation layer 300 may include a portion located in the display area and a portion located in the peripheral area. The insulating layer 400 may include a portion located in the display area and a portion located in the peripheral area.

[0064] For example, as Figure 2 shown, the light-emitting functional layer 130 may include a light-emitting layer for emitting light and a charge generation layer 133. For example, the light-emitting functional layer 130 may be a film layer in an organic light-emitting element. For example, the light-emitting functional layer 130 may include a first light-emitting layer, a charge generation layer (CGL) 133, and a second light-emitting layer which are stacked, and the charge generation layer 133 is located between the first light-emitting layer and the second light-emitting layer. Figure 2 The thicknesses of the plurality of film layers included in the shown light-emitting functional layer 130 are only for clearly showing each film layer and do not represent actual sizes. For example, in the same sub-pixel 100, the first light-emitting layer and the second light-emitting layer may be light-emitting layers emitting the same color light. For example, the first light-emitting layers in sub-pixels 100 emitting different color lights emit different color lights. For example, the second light-emitting layers in sub-pixels 100 emitting different color lights emit different color lights. Of course, the embodiments of the present disclosure are not limited thereto. For example, in the same sub-pixel 100, the first light-emitting layer and the second light-emitting layer may be light-emitting layers emitting different color lights. By setting light-emitting layers emitting different color lights in the same sub-pixel 100, the light emitted by the multiple light-emitting layers included in the sub-pixel 100 can be mixed into white light, and the color of the light emitted by each sub-pixel 100 can be adjusted by setting a color filter layer.

[0065] For example, as Figure 2 shown, the film layer 131 between the charge generation layer 133 and the substrate 01 may include a first light-emitting layer and other functional layers. For example, a hole injection layer may be provided between the first electrode 110 and the first light-emitting layer. For example, an electron transport layer may be provided between the charge generation layer 133 and the first light-emitting layer. For example, the film layer 132 between the charge generation layer 133 and the second electrode 120 may include a second light-emitting layer and other functional layers. For example, a hole transport layer may be provided between the second light-emitting layer and the charge generation layer 133. For example, an electron transport layer and an electron injection layer may be provided between the second light-emitting layer and the second electrode 120.

[0066] For example, the hole injection layer, the hole transport layer, the electron transport layer, the electron injection layer, the charge generation layer 133, and the second electrode 120 are all common film layers for multiple sub-pixels and can be referred to as common layers. For example, the above-mentioned common layer and the second electrode 120 can be an integral film layer formed by using an open mask. For example, the first light-emitting layer and the second light-emitting layer can be film layers formed by using a fine metal mask (FMM), and a gap can be provided between the light-emitting layers of different sub-pixels.

[0067] For example, as Figure 2 shown, the charge generation layer 133 has strong conductivity, which can enable the light-emitting functional layer 130 to have the advantages of long lifespan, low power consumption, and high brightness. For example, the charge generation layer 133 can include an N-type charge generation layer 133 and a P-type charge generation layer 133. For example, the material of the charge generation layer 133 can be a material containing a phosphorus-oxygen group or a material containing triazine. For example, the ratio of the electron mobility of the material of the charge generation layer 133 to the electron mobility of the material of the electron transport layer is 10 -2 ~10 2 .

[0068] For example, as Figure 2 shown, the first electrode 110 can be an anode, and the second electrode 120 can be a cathode.

[0069] For example, as Figure 1 shown, the first electrode 110 includes a main electrode 111 and a connection electrode 112. The main electrode 111 overlaps with the first opening 210, and the connection electrode 112 is covered by the pixel defining portion 230. For example, the sub-pixel further includes a pixel circuit, as Figure 2 shown in the structure in the film layer 02, located between the first electrode 110 and the substrate 01. The connection electrode 112 is electrically connected to the pixel circuit through a via 113 in the isolation layer 300 and the insulating layer 400 between it and the pixel circuit. For example, the shape of the main electrode 111 is similar to the shape of the light-emitting area. For example, the main electrode 111 and the connection electrode 112 are integrally provided structures.

[0070] As Figure 1 and Figure 2 shown, the pixel defining pattern 200 is located on the side of the first electrode 110 away from the substrate 01. The pixel defining pattern 200 includes a plurality of first openings 210, a plurality of second openings 220, and a pixel defining portion 230 surrounding the plurality of first openings 210 and the plurality of second openings 220. The plurality of first openings 210 are configured to expose the first electrodes 110 of the plurality of sub-pixels 100. For example, the second openings 220 are located in the display area.

[0071] For example, asFigure 1 and Figure 2 As shown, the first opening 210 may be a pixel opening for defining a light-emitting region of a sub-pixel. When the light-emitting functional layer 130 is formed in the first opening 210 of the pixel defining pattern 200, the first electrode 110 and the second electrode 120 located on both sides of the light-emitting functional layer 130 can drive the light-emitting functional layer 130 in the first opening 210 to emit light. The light-emitting region may refer to an effective light-emitting region of the sub-pixel 100. The shape of the light-emitting region refers to a two-dimensional shape. For example, the shape of the light-emitting region may be the same as the shape of the first opening 210 of the pixel defining pattern 200. The light-emitting region may refer to an area defined by a circle of edges where the pixel defining portion 230 contacts the first electrode 110. The area may be referred to as a PDL opening.

[0072] Figure 2 It is schematically shown that the shape of the cross section of the side surface of the pixel defining portion 230 surrounding the first opening 210 cut by the XY plane is a straight line, but the invention is not limited thereto, and the cross section of the side surface may also be a curve.

[0073] For example, Figure 1 and Figure 2 As shown, one sub-pixel 100 corresponds to at least one first opening 210 , and at least a portion of the light-emitting functional layer 130 of the sub-pixel 100 is located in the first opening 210 corresponding to the sub-pixel 100 .

[0074] For example, Figure 1 and Figure 2 As shown, the material of the pixel defining portion 230 may include polyimide, acryl, polyethylene terephthalate, or the like.

[0075] For example, Figure 2 As shown, the portions of each layer in the light-emitting functional layer 130 located in the first opening 210 are continuously arranged, and the portions of the second electrode 120 located in the first opening 210 are continuously arranged.

[0076] like Figure 2 As shown, the isolation layer 300 is located between the first electrode 110 and the base substrate 01, and the insulating layer 400 is located between the isolation layer 300 and the base substrate 01. The insulating layer 400 includes a groove 410 located between adjacent sub-pixels 100, and the notch of the groove 410 includes a first edge 411 exposed by the second opening 220. The isolation layer 300 includes a first protrusion 301 protruding relative to the first edge 411, and the first protrusion 301 is configured to block at least one layer of the light-emitting functional layer 130. For example, the first protrusion 301 is exposed by the second opening 220 to block at least one layer of the light-emitting functional layer 130. The provision of the first protrusion 301 is conducive to reducing crosstalk between adjacent sub-pixels.

[0077] The adjacent sub-pixels mentioned above are not limited to two sub-pixels adjacent in the X direction, but can also be two sub-pixels adjacent in the Y direction, or two sub-pixels adjacent in other directions. For example, the adjacent sub-pixels mentioned above can refer to two adjacent sub-pixels that emit different colors of light, but are not limited to two fixed-color sub-pixels. For example, the adjacent sub-pixels can include multiple situations, such as including three situations of a blue sub-pixel and a green sub-pixel, a red sub-pixel and a green sub-pixel, and a blue sub-pixel and a red sub-pixel.

[0078] For example, as Figure 2 shown, the depth of the groove 410 is greater than the thickness of the light-emitting functional layer and less than the maximum thickness of the insulating layer. The angle between the side surface and the bottom surface of the groove 410 is greater than 90 degrees, and the size of the first protrusion 301 is greater than 0.01 micrometer and less than the thickness of the light-emitting functional layer.

[0079] For example, as Figure 2 shown, the charge generation layer 133 in the light-emitting functional layer 130 is interrupted at the edge of the first protrusion 301. For example, the charge generation layer 133 in the light-emitting functional layer 130 and the film layers between it and the substrate 01 are all interrupted at the edge of the first protrusion 301. For example, each layer in the light-emitting functional layer 130 is interrupted at the edge of the first protrusion 301. For example, the second electrode 120 is interrupted at the edge of the first protrusion 301.

[0080] As Figure 1 and Figure 2 shown, the adjacent sub-pixels 100 include a first sub-pixel 101 and a second sub-pixel 102. The luminous efficiency of the first sub-pixel 101 is less than that of the second sub-pixel 102. The isolation layer 300 includes a first isolation portion 310 and a second isolation portion 320. The first isolation portion 310 overlaps with the first electrode 110 of the first sub-pixel 101, and the second isolation portion 320 overlaps with the first electrode 110 of the second sub-pixel 102. The first isolation portion 310 includes a first protrusion 301. For example, the first isolation portion 310 overlapping with the first sub-pixel 101 is used to interrupt at least one layer of the light-emitting functional layer 130. For example, the first isolation portion 310 and the second isolation portion 320 are located in the display area.

[0081] The luminous efficiency mentioned above and in the following descriptions refers to the efficiency in the process of the sub-pixel converting electrical energy into light energy. The second sub-pixel with a high luminous efficiency can provide higher brightness under the same power consumption or consume less electrical energy when reaching the same brightness.

[0082] For example, as Figure 1 shown, the area of the light-emitting region of the first sub-pixel 101 is larger than the area of the second sub-pixel 102.

[0083] As Figure 2As shown, the notch of the groove 410 includes a second edge 412. The second isolation part 320 includes a second protruding part 302 protruding relative to the second edge 412. The pixel defining part 230 covers the second protruding part 302 and a part of the groove 410.

[0084] For example, as Figure 2 shown, although the second isolation part 320 overlapping with the second sub-pixel 102 having a second protruding part 302 protruding relative to the notch of the groove 410, the second protruding part 302 is covered by the pixel defining part 230. Therefore, the second protruding part 302 does not block any film layer in the light-emitting functional layer 130. For example, the first protruding part 301 and the second protruding part 302 protrude in a direction approaching each other relative to the notch of the groove 410. For example, the distance between the first protruding part 301 and the second protruding part 302 is less than the distance between the first edge 411 and the second edge 412.

[0085] Regarding the problem that the second sub-pixel has serious smear while the first sub-pixel has basically no smear when the isolation part overlapping with the second sub-pixel with high luminous efficiency is used to block the light-emitting functional layer while the isolation part 310 overlapping with the first sub-pixel with low luminous efficiency does not block the light-emitting functional layer, in the display substrate provided by the present disclosure, the first protruding part in the first isolation part overlapping with the first sub-pixel with low luminous efficiency blocks the light-emitting functional layer, and the second protruding part in the second isolation part overlapping with the second sub-pixel with high luminous efficiency is covered by the pixel defining part, which is beneficial to alleviating the smear phenomenon of the second sub-pixel and improving the display effect of the display substrate.

[0086] In some examples, as Figure 2 shown, both the light-emitting functional layer 130 and the second electrode 120 are disconnected at the edge of the first protruding part 301. The light-emitting functional layer 130 includes a charge generation layer 133. The charge generation layer 133 and the second electrode 120 are in contact on the side of the first protruding part 301 away from the substrate 01, and the charge generation layer 133 and the second electrode 120 are spaced apart on the side of the first protruding part 301 close to the substrate 01.

[0087] With respect to the problem of serious second sub-pixel smear caused by using the isolation portion overlapping with the second sub-pixel with high luminous efficiency to isolate the luminous functional layer so that the charge generation layer on the second isolation portion overlaps with the second electrode, in the display substrate provided by the present disclosure, the position where the charge generation layer 133 overlaps with the second electrode 120 to generate a short circuit is located on the first isolation portion 310. On the one hand, the problem of serious smear of the second sub-pixel 102 can be alleviated; on the other hand, since the luminous efficiency of the first sub-pixel 101 is relatively low, the impact of the short circuit problem between the charge generation layer 133 and the second electrode 120 on the first sub-pixel 101 is smaller than the impact of the short circuit problem on the second isolation portion 320 on the second sub-pixel 102, thereby balancing the difference in smear between the first sub-pixel 101 and the second sub-pixel 102.

[0088] In some examples, such as Figure 1 and Figure 2 As shown, the first sub-pixel 101 includes a blue sub-pixel, and the second sub-pixel 102 includes a green sub-pixel. However, it is not limited thereto, the first sub-pixel 101 may also be a red sub-pixel, and the second sub-pixel 102 may be a green sub-pixel, or the first sub-pixel 101 may be a blue sub-pixel, and the second sub-pixel 102 may be a red sub-pixel.

[0089] In some examples, such as Figure 2 As shown, the material of the isolation layer 300 includes an inorganic non-metallic material, the material of the insulating layer 400 includes an organic material, the two side surfaces of the isolation layer 300 are in contact with the first electrode 110 and the insulating layer 400 respectively, and the orthographic projection of the first electrode 110 on the base substrate 01 is completely located within the orthographic projection of the isolation layer 300 on the base substrate 01. By arranging the first electrode 110 so that its orthographic projection is completely located within the orthographic projection of the isolation layer 300, it is beneficial to improve the flatness of the first electrode 110.

[0090] For example, Figure 2 As shown, the material of the isolation layer 300 may include silicon nitride or silicon oxide. For example, the insulating layer 400 may be a planarization layer, and the material of the insulating layer 400 may include polyimide or other materials.

[0091] For example, Figure 2As shown, after forming the insulating layer 400 on the substrate 01, the isolation layer 300 can be formed, and the isolation layer 300 is etched with an etching solution to form a first isolation portion 310, a second isolation portion 320, and a groove 410. Since the etching selectivity of the etching solution for the material of the insulating layer 400 is greater than the etching selectivity of the etching solution for the material of the isolation layer 300, the edge of the groove 410 formed after etching is retracted relative to the edge of the isolation layer 300. For example, the first edge 411 of the groove 410 is retracted relative to the edge of the first isolation portion 310, and the second edge 412 of the groove 410 is retracted relative to the edge of the second isolation portion 320.

[0092] Figure 2 The second protruding portion 302 of the second isolation portion 320 is circled with a dotted line frame, and the first protruding portion 301 protruding relative to the first edge 411 of the groove 410 in the first isolation portion 310 is divided by a dotted line. The second protruding portion 302 and the portion of the second isolation portion 320 other than the second protruding portion 302 are integrally provided structures, and the first protruding portion 301 and the portion of the first isolation portion 310 other than the first protruding portion 301 are integrally provided structures.

[0093] Figure 2 Only the film layer between the second electrode 120 and the substrate 01 is shown. For example, a spacer (such as Figure 10 shown), a packaging layer and other structures can be provided on the side of the second electrode 120 away from the substrate 01.

[0094] In some examples, as Figure 2 shown, both the light-emitting functional layer 130 and the second electrode 120 are disconnected at the edge of the first protruding portion 301, and are configured such that the ratio of the distance D1 to the distance D2 between the adjacent first openings 210 defining the light-emitting regions of the adjacent sub-pixels 100 and the edge of the first protruding portion 301 is 0.95 to 1.05, which is beneficial to balancing the crosstalk between adjacent two sub-pixels.

[0095] For example, as Figure 2 shown, the ratio of the distance D1 to the distance D2 between the adjacent first openings 210 and the edge of the first protruding portion 301 is 1.

[0096] In some examples, as Figure 1 and Figure 2 shown, the adjacent first openings 210 exposing the first electrodes 110 of the adjacent sub-pixels 100 include a first sub-opening 211 and a second sub-opening 212. The second opening 220 located between the first sub-opening 211 and the second sub-opening 212 has distances D10 and D20 from the first sub-opening 211 and the second sub-opening 212 respectively, and the ratio of the first distance D10 to the second distance D20 is 0.95 to 1.05. For example, the ratio of the first distance to the second distance is 1.

[0097] The distance between the first sub-opening 211 and the second opening 220 described above and hereinafter may refer to the distance between the hypotenuse of the pixel defining portion 230 and the edge of the contact position of the first electrode 110 and the edge of the contact position of the pixel defining portion 230 and the first isolation portion 310. The distance between the second sub-opening 212 and the second opening 220 described above and hereinafter may refer to the distance between the edge where the pixel defining portion 230 contacts the first electrode 110 and the edge of the contact position of the pixel defining portion 230 and the bottom 241 of the groove 410.

[0098] Since the distance between adjacent first sub-openings 211 and second sub-openings 212 is small, by setting the distance relationship among the first sub-opening 211, the second sub-opening 212, and the second opening 220, while the first protrusion 301 separates the light-emitting functional layer 130 and the second electrode 120, the position of the second opening 220 is prevented from affecting the light-emitting region of the sub-pixel.

[0099] Figure 3 Schematic diagram of a partial cross-sectional structure of a display substrate provided for another example according to an embodiment of the present disclosure.

[0100] Figure 3 The display substrate in the illustrated example is Figure 2 different from the display substrate in the illustrated example in that the distance between the first protrusion 301 and the first openings 210 on both sides thereof is different.

[0101] In some examples, as Figure 3 shown, both the light-emitting functional layer 130 and the second electrode 120 are disconnected at the edge of the first protrusion 301. The adjacent first openings 210 configured to define the light-emitting regions of adjacent sub-pixels include a first sub-opening 211 and a second sub-opening 212. The first sub-opening 211 is configured to define the light-emitting region of the first sub-pixel 101, and the second sub-opening 212 is configured to define the light-emitting region of the second sub-pixel 102. The distance D1 between the first sub-opening 211 and the edge of the first protrusion 301 is greater than the distance D2 between the second sub-opening 212 and the edge of the first protrusion 301.

[0102] By reducing the distance between the first protrusion 301 and the light-emitting region of the second sub-pixel 102 with higher luminous efficiency, it is beneficial to reduce the overlapping area between the charge generation layer 133 of the second sub-pixel 102 and the second electrode 120, reduce the capacitance between the two, and further improve the smear phenomenon generated by the second sub-pixel 102.

[0103] In some examples, as Figure 3As shown, the second opening 220 located between the first sub-opening 211 and the second sub-opening 212 has a first distance D10 and a second distance D20 from the first sub-opening 211 and the second sub-opening 212 respectively, and the first distance D10 is greater than the second distance D20.

[0104] By setting the second opening 220 to be closer to the light-emitting region of the second sub-pixel 102 with higher luminous efficiency, while satisfying that the first protrusion 301 is closer to the light-emitting region of the second sub-pixel 102, an appropriate distance can be maintained between the edge of the first protrusion 301 and the pixel defining portion 230, ensuring the blocking effect of the first protrusion 301 on the light-emitting functional layer 130.

[0105] For example, as Figure 3 shown, the ratio of the first distance D10 to the second distance D20 is 1 to 2.

[0106] Figure 3 In the display substrate shown, except for the above distances D1 and D2, the first distance D01, the second distance D02, and Figure 2 the other structures different from the corresponding distances shown can be the same as the corresponding structures shown in Figure 2 shown, and will not be elaborated here.

[0107] Figure 4A , Figure 4B and Figure 5 are partial cross-sectional structure schematic diagrams of display substrates provided according to different examples of the present disclosure.

[0108] Figure 4A , Figure 4B and Figure 5 The difference between the display substrate in the example shown and the display substrate in the example shown in Figure 2 is that the pixel defining portion 230 between adjacent sub-pixels further includes a recessed portion 240; Figure 4A The difference from the display substrate in the example shown in Figure 4B is that the relative positional relationship between the recessed portion 240 and the first electrode 110 is different; Figure 4A and Figure 5 The difference between the display substrates in the examples shown is that the number of recessed portions 240 is different. Figure 4A , Figure 4B and Figure 5 The features of the structure of the display substrate shown except for the recessed portion 240 can be the same as the corresponding structures in the display substrate shown in Figure 2 shown, or can be the same as the corresponding structures in the display substrate shown in Figure 3 shown, and will not be elaborated here.

[0109] In some examples, such as Figure 4AAs shown, at least one recess 240 is provided on the surface of the pixel defining portion 230 between adjacent sub-pixels away from the substrate 01. The depth of the recess 240 is not less than the thickness of the light-emitting functional layer 130, and the distance between the bottom 241 of the recess 240 and the substrate 01 is greater than the distance between the surface of the first electrode 110 away from the substrate 01 and the substrate 01.

[0110] By providing the recess 240 in the pixel defining portion 230 between adjacent sub-pixels, it is beneficial to extend the crosstalk path of the light-emitting functional layer 130. Thus, while alleviating the smear problem of the sub-pixels, the crosstalk between adjacent sub-pixels can be reduced.

[0111] Figure 4A Schematically showing that the bottom 241 of the recess 240 is a plane, the depth of the recess 240 is the distance between the bottom 241 and the edge of the recess opening of the recess 240; however, it is not limited thereto. If the bottom 241 of the recess 240 is a curved surface, the depth of the recess 240 can refer to the maximum depth or the average depth of the recess 240. The thickness of the light-emitting functional layer 130 can refer to the thickness of the portion of the light-emitting functional layer 130 located between the recess 240 and the edge of the first opening 210. By setting the depth of the recess 240 to be greater than the thickness of the light-emitting functional layer 130, the surface of the light-emitting functional layer 130 located in the recess 240 can be recessed, playing a role in extending the path.

[0112] In some examples, as Figure 4A shown, the cross-section of each recess 240 in at least one recess 240 intercepted by a plane parallel to the arrangement direction of adjacent sub-pixels and perpendicular to the substrate 01 includes two side edges 242 and a bottom edge 2410. Along the direction of the insulating layer 400 away from the substrate 01, the distance between the two side edges 242 gradually increases, and the angle α at the connection of at least one side edge 242 and the bottom edge 2410 is 100 to 110 degrees.

[0113] For example, as Figure 4A shown, the light-emitting functional layer 130 is disconnected in the recess 240, and the second electrode 120 is continuously provided at the edge in the recess 240.

[0114] By setting the depth of the recess 240 and the inclination angle of the side edge 242, the second electrode 120 can be continuously provided at the edge in the recess 240.

[0115] The above-mentioned "arrangement direction of adjacent sub-pixels" can be Figure 4A the X direction shown, but it is not limited thereto, and it can also be Figure 1The Y direction shown, or the arrangement direction of sub-pixels arranged in other directions. The above-mentioned "plane parallel to the arrangement direction of adjacent sub-pixels and perpendicular to the substrate 01" can be the XZ plane. The above-mentioned "direction away from the substrate 01 of the insulating layer 400" is perpendicular to the substrate 01 and is the direction from the substrate 01 to the insulating layer 400, such as the Z direction. For example, in the direction away from the substrate 01, the two opposite side edges 242 of the recess 240 are inclined in a direction away from each other. For example, the angle α is the angle between the side wall of the recess 240 and the surface of the bottom 241.

[0116] For example, as Figure 4A shown, the angle α is 100 degrees or 110 degrees. For example, the angle α is 103 to 107 degrees. For example, the angle α is 105 to 109 degrees. For example, the angle α is 102 to 106 degrees. Specific values of the angle α in the embodiments of the present disclosure are not listed one by one, and can be any value between 100 and 110 degrees.

[0117] Figure 4A Schematically, the side edge 242 and the bottom edge 2410 of the cross-section of the recess 240 are both straight lines, and the angle α is the included angle at the connection of the two straight lines, but not limited to this. At least one of the side edge 242 and the bottom edge 2410 can be a curve, and the angle α can be the tangent angle at the connection of the side edge 242 and the bottom edge 2410.

[0118] For example, in other examples, both the light-emitting functional layer and the second electrode are disconnected in the recess; or part of the film layer of the light-emitting functional layer is disconnected in the recess, and the second electrode is continuously arranged in the recess.

[0119] In some examples, as Figure 4A shown, the thickness of the part of the light-emitting functional layer 130 on the side wall 2420 of at least one recess 240 is less than the thickness of the part of the light-emitting functional layer 130 in the first opening 210.

[0120] By providing the recess 240 in the pixel defining portion 230, the thickness of the light-emitting functional layer 130 at the side wall of the recess 240 can be reduced, the resistance of the charge generation layer 133 is increased, the crosstalk path of the charge generation layer 133 is extended, which is beneficial to reducing the crosstalk between adjacent sub-pixels.

[0121] For example, as Figure 4A shown, the thickness of the part of the second electrode 120 on the side wall 2420 is less than the thickness of the part of the second electrode 120 in the first opening 210.

[0122] In some examples, as Figure 4A shown, the orthographic projection of the bottom 241 of the recess 240 on the substrate 01 does not overlap with the orthographic projection of the first electrode 110 on the substrate 01.

[0123] By setting the relative positional relationship between the recessed portion 240 and the first electrode 110, it is possible to reduce crosstalk between adjacent sub-pixels in the recessed portion 240 while avoiding the position of the recessed portion 240 from affecting the performance of the first electrode 110.

[0124] For example, as Figure 4A shown, the orthographic projection of the side wall 2420 of the recessed portion 240 on the substrate 01 may overlap or not overlap with the orthographic projection of the first electrode 110 on the substrate 01.

[0125] For example, as Figure 4A shown, along the direction perpendicular to the substrate 01, the recessed portion 240 overlaps with the first isolation portion 310, and the second electrode 120 extends or is disconnected at the edge extension path of the recessed portion 240. By setting the recessed portion 240 to overlap with the first isolation portion 310 while the recessed portion 240 is configured to extend the path of the second electrode or block the second electrode, it is beneficial to alleviate the smear problem that occurs in the first sub-pixel 101 due to the electrical connection between the second electrode 120 and the charge generation layer 133 on the first protrusion 301.

[0126] For example, in other examples, along the direction perpendicular to the substrate 01, the recessed portion 240 only overlaps with the first isolation portion 310, the recessed portion 240 does not overlap with the second isolation portion 320, and the distance between the edge of the first protrusion 301 and the second sub-opening 212 is less than the distance between the edge of the first protrusion 301 and the first sub-opening 211, which can extend the path of the light-emitting functional layer 130 while reducing the capacitance between the charge generation layer 133 and the second electrode 120 in the second sub-pixel 102 to alleviate the smear phenomenon of the second sub-pixel 102.

[0127] For example, in other examples, along the direction perpendicular to the substrate 01, the recessed portion 240 only overlaps with the second isolation portion 320, and the recessed portion 240 does not overlap with the first isolation portion 310.

[0128] For example, as Figure 4A shown, the cross-section of the recessed portion 240 may be the cross-section of a strip-shaped recessed portion 240 extending along the direction perpendicular to the XZ plane (refer to the planar shape of the recessed portion shown in Figure 11 ), or may be the cross-section of one of the plurality of recessed portions 240 arranged along the direction perpendicular to the XZ plane.

[0129] In some examples, as Figure 4B shown, along the direction perpendicular to the substrate 01, the bottom 241 of the recessed portion 240 overlaps with the first electrode 110, and the distance between the bottom 241 of the recessed portion 240 and the first electrode 110 is greater than 2000 angstroms.

[0130] When the recessed portion 240 overlaps with the first electrode 110, by defining the distance between the bottom 241 of the recessed portion 240 and the first electrode 110, the influence of the recessed portion 240 on the characteristics of the first electrode 110 can be prevented.

[0131] For example, as Figure 4B shown, the distance between the bottom 241 of the recessed portion 240 and the first electrode 110 is greater than 3000 Å, or greater than 5000 Å, etc. While the depth of the recessed portion 240 is greater than the thickness of the light-emitting functional layer 130, the distance between the bottom 241 of the recessed portion 240 and the first electrode 110 can be any value greater than 2000 Å, and specific values of this angle are not enumerated one by one in the embodiments of the present disclosure.

[0132] In some examples, as Figure 5 shown, at least one recessed portion 240 includes a plurality of recessed portions 240, and recessed portions 240 are provided on both sides of the first protrusion 301 located between adjacent sub-pixels along the arrangement direction of adjacent sub-pixels.

[0133] By providing recessed portions 240 on both sides of the first protrusion 301, it is beneficial to further extend the crosstalk path of the light-emitting functional layer 130 and reduce the crosstalk between adjacent sub-pixels.

[0134] For example, as Figure 5 shown, the pixel defining portion 230 located between the first protrusion 301 and the first sub-opening 211 may include at least one recessed portion 240, and the pixel defining portion 230 located between the first protrusion 301 and the second sub-opening 212 may include at least one recessed portion 240.

[0135] For example, Figure 5 shown, the cross-section of each recessed portion 240 may be the cross-section of a strip-shaped recessed portion 240 extending in a direction perpendicular to the XZ plane, or may include the cross-section of one of a plurality of recessed portions 240 arranged in a direction perpendicular to the XZ plane.

[0136] For example, as Figure 5 shown, the plurality of recessed portions 240 include a recessed portion 240 overlapping with the first isolation portion 310 and a recessed portion 240 overlapping with the second isolation portion 320. For example, the shapes of different recessed portions 240 may be the same or different.

[0137] Figure 6 Schematic diagram of a partial planar structure of a display substrate provided for an example according to another embodiment of the present disclosure. Figure 7 For along Figure 6 shown, it is a schematic diagram of a partial cross-sectional structure taken along line BB'.

[0138] As Figure 6 and Figure 7 shown, the display substrate includes a substrate substrate 01, a plurality of sub-pixels 100 located on the substrate substrate 01, a pixel defining pattern 200, an isolation layer 300, and an insulating layer 400. Each of at least some of the sub-pixels 100 includes a first electrode 110, a light-emitting functional layer 130, and a second electrode 120 that are stacked. The first electrode 110 is located between the light-emitting functional layer 130 and the substrate substrate 01, and the light-emitting functional layer 130 includes a plurality of film layers. For example, the display substrate includes a display area and a peripheral area surrounding the display area. The plurality of sub-pixels are located in the display area of the display substrate. The pixel defining pattern 200 may include a portion located in the display area and a portion located in the peripheral area. The isolation layer 300 may include a portion located in the display area and a portion located in the peripheral area. The insulating layer 400 may include a portion located in the display area and a portion located in the peripheral area.

[0139] For example, Figure 6 and Figure 7 in the embodiments shown, the first electrode 110, the light-emitting functional layer 130, and the second electrode 120 of the sub-pixel 100 may have the same features as the corresponding structures of the sub-pixels in the embodiments shown in Figure 1 and Figure 2 and will not be described herein again.

[0140] As Figure 6 and Figure 7 shown, the pixel defining pattern 200 is located on a side of the first electrode 110 away from the substrate substrate 01. The pixel defining pattern 200 includes a plurality of first openings 210, a plurality of second openings 220, and a pixel defining portion 230 surrounding the plurality of first openings 210 and the plurality of second openings 220. The plurality of first openings 210 are configured to expose the first electrodes 110 of the plurality of sub-pixels 100. For example, the second openings 220 are located in the display area. The first openings 210 of the pixel defining pattern 200 in this embodiment have the same features as the first openings 210 in the embodiments shown in Figure 1 and Figure 2 and will not be described herein again.

[0141] As Figure 6 and Figure 7As shown, the isolation layer 300 is located between the first electrode 110 and the base substrate 01, and the insulating layer 400 is located between the isolation layer 300 and the base substrate 01. The insulating layer 400 includes a groove 410 located between adjacent sub-pixels 100, and the adjacent sub-pixels 100 include a first sub-pixel 101 and a second sub-pixel 102. The isolation layer 300 includes a first isolation portion 310 and a second isolation portion 320. The first isolation portion 310 overlaps with the first electrode 110 of the first sub-pixel 101, and the second isolation portion 320 overlaps with the first electrode 110 of the second sub-pixel 102. The first isolation portion 310 includes a first protrusion 301 protruding relative to the edge of the notch of the groove 410, and the second isolation portion 320 includes a second protrusion 302 protruding relative to the edge of the notch. The first protrusion 301 and the second protrusion 302 are both configured to block at least one layer of the light-emitting functional layer 130.

[0142] In some examples, such as Figure 7 As shown, the first protrusion 301 and the second protrusion 302 are both exposed by the second opening 220 to separate the light-emitting functional layer 130 and the second electrode 120. For example, the charge generation layer 133 on the first protrusion 301 overlaps with the second electrode 120, and the charge generation layer 133 on the second protrusion 302 overlaps with the second electrode 120.

[0143] For example, Figure 7 As shown, the first protrusion 301 and the second protrusion 302 protrude toward each other relative to the edge of the groove 410. For example, the distance between the first protrusion 301 and the second protrusion 302 is smaller than the distance between the two edges of the groove 410.

[0144] The adjacent sub-pixels may be any adjacent sub-pixels, not limited to two adjacent sub-pixels in the X direction, but may also be two adjacent sub-pixels in the Y direction. For example, the adjacent sub-pixels may refer to two adjacent sub-pixels that emit light of different colors, but are not limited to two fixed color sub-pixels. For example, the adjacent sub-pixels may include multiple situations, such as a blue sub-pixel and a green sub-pixel, or a red sub-pixel and a green sub-pixel.

[0145] For example, Figure 7 As shown, the depth of the groove 410 is greater than the thickness of the light-emitting functional layer and less than the maximum thickness of the insulating layer, the angle between the side and bottom of the groove 410 is greater than 90 degrees, the size of the first protrusion 301 is greater than 0.01 microns and less than the thickness of the light-emitting functional layer, and the size of the second protrusion 302 is greater than 0.01 microns and less than the thickness of the light-emitting functional layer.

[0146] like Figure 7As shown, the second opening 220 exposes at least a portion of the groove 410 , and along the arrangement direction of adjacent sub-pixels, a dimension of at least one of the first isolation portion 310 and the second isolation portion 320 exposed by the second opening 220 is smaller than a distance D32 between the first protrusion 301 and the second protrusion 302 .

[0147] By setting both protrusions to isolate the light-emitting functional layer 130 and setting the distance between the two protrusions to be larger than the size of at least one of the first isolation portion 310 and the second isolation portion 320 exposed by the second opening 220, it is possible to reduce the crosstalk between the first sub-pixel 101 and the second sub-pixel 102 while setting at least one of the distance between the first protrusion 301 and the light-emitting area of ​​the first sub-pixel 101 and the distance between the second protrusion 302 and the light-emitting area of ​​the second sub-pixel 102 to be smaller, so as to reduce the capacitance between the second electrode 120 and the charge generation layer 133 in at least one of the first sub-pixel 101 and the second sub-pixel 102, which is beneficial to reduce the smear phenomenon generated by at least one of the first sub-pixel 101 and the second sub-pixel 102.

[0148] For example, Figure 7 As shown, both the first isolation portion 310 and the second isolation portion 320 are exposed by the second opening 220 .

[0149] In some examples, such as Figure 7 As shown, along the arrangement direction of adjacent sub-pixels, the dimension D31 of the first isolation portion 310 exposed by the second opening 220 and the dimension D33 of the second isolation portion 320 exposed by the second opening 220 are both smaller than the distance D32 between the first protrusion 301 and the second protrusion 302. This is beneficial to reduce the capacitance between the second electrode 120 and the charge generation layer 133 in the first sub-pixel 101 and the capacitance between the second electrode 120 and the charge generation layer 133 in the second sub-pixel 102, thereby simultaneously reducing the smear phenomenon generated by the first sub-pixel 101 and the second sub-pixel 102.

[0150] For example, Figure 7 As shown, both D31 and D33 are greater than 0. However, not limited thereto, at least one of D31 and D33 may be equal to 0, that is, the edge of at least one of the first protrusion 301 and the second protrusion 302 is flush with the edge of the pixel defining portion 230 .

[0151] For example, Figure 7 As shown, the groove 410 is completely exposed by the second opening 220 .

[0152] For example, Figure 7As shown, when the distance between the light-emitting regions of the first sub-pixel 101 and the second sub-pixel 102 is 20 micrometers, the distance D32 between the first protrusion 301 and the second protrusion 302 can be 3.5 micrometers; the size D31 of the first isolation portion 310 exposed by the second opening 220 and the size D33 of the second isolation portion 320 exposed by the second opening 220 can be equal, such as both being 1.75 micrometers, but not limited thereto, and the two can also be unequal.

[0153] For example, as Figure 7 shown, the material of the isolation layer 300 includes inorganic non-metallic materials, the material of the insulating layer 400 includes organic materials, the two side surfaces of the isolation layer 300 are respectively in contact with the first electrode 110 and the insulating layer 400, and the orthographic projection of the first electrode 110 on the substrate 01 is completely located within the orthographic projection of the isolation layer 300 on the substrate 01.

[0154] For example, as Figure 7 shown, the material of the isolation layer 300 can include silicon nitride or silicon oxide. For example, the insulating layer 400 can be a planarization layer, and the material of the insulating layer 400 can include materials such as polyimide.

[0155] For example, as Figure 7 shown, after forming the insulating layer 400 on the substrate 01, the isolation layer 300 can be formed, and the isolation layer 300 can be etched with an etching solution to form the first isolation portion 310, the second isolation portion 320, and the groove 410. Since the etching selectivity of the etching solution for the material of the insulating layer 400 is greater than the etching selectivity of the etching solution for the material of the isolation layer 300, the edge of the groove 410 formed after etching is recessed relative to the isolation layer 300, such as the edges of the first isolation portion 310 and the second isolation portion 320. By setting the first electrode 110 such that its orthographic projection is completely located within the orthographic projection of the isolation layer 300, it is beneficial to improve the flatness of the first electrode 110.

[0156] Figure 7 The substrate 01 and the film layer 02 in the illustrated embodiment can be the same as Figure 2 the substrate 01 and the film layer 02 in the illustrated embodiment and will not be elaborated here. Figure 7 Only the film layer between the second electrode 120 and the substrate 01 is shown. For example, structures such as spacers and encapsulation layers can also be provided on the side of the second electrode 120 away from the substrate 01.

[0157] In some examples, such as Figure 7As shown, the adjacent first openings 210 configured to define the light-emitting regions of adjacent sub-pixels include a first sub-opening 211 and a second sub-opening 212. The first sub-opening 211 is configured to define the light-emitting region of the first sub-pixel 101, and the second sub-opening 212 is configured to define the light-emitting region of the second sub-pixel 102. The ratio of the distance D34 between the edge of the first sub-opening 211 and the edge of the first protrusion 301 to the distance D35 between the edge of the second sub-opening 212 and the edge of the second protrusion 302 is 0.95 to 1.05 to balance the crosstalk between two adjacent sub-pixels.

[0158] For example, as Figure 7 shown, the ratio of the distance D34 to the distance D35 is 1.

[0159] For example, as Figure 7 shown, when the distance between the light-emitting region of the first sub-pixel 101 and the light-emitting region of the second sub-pixel 102 is 20 micrometers, the distance D34 and the distance D35 can be the same, such as both being 8.25 micrometers, but not limited thereto, and the two can also be different.

[0160] In some examples, as Figure 6 shown, the first sub-pixel 101 and the second sub-pixel 102 are two different color sub-pixels among blue sub-pixels, green sub-pixels, and red sub-pixels. For example, one of the first sub-pixel 101 and the second sub-pixel 102 is a blue sub-pixel, and the other is a green sub-pixel. For example, one of the first sub-pixel 101 and the second sub-pixel 102 is a red sub-pixel, and the other is a green sub-pixel.

[0161] For example, as Figure 6 shown, the second openings 220 between adjacent sub-pixels arranged along the X direction and the Y direction expose the protrusions on both sides, so that the light-emitting functional layer 130 and the second electrode 120 in the second openings 220 are partitioned twice. For example, the two opposite side edges in the X direction and the two opposite side edges in the Y direction of the isolation part overlapping with the first electrode 110 of the same sub-pixel are exposed by the second openings 220.

[0162] Compared with the case where the second opening 220 only exposes the edges of the isolation part overlapping with the first electrode 110 of the red sub-pixel and the green sub-pixel, resulting in serious ghosting of the red sub-pixel and the green sub-pixel, the second opening 220 in the display substrate provided in this embodiment exposes the isolation parts corresponding to the adjacent green sub-pixel and blue sub-pixel and the isolation parts corresponding to the adjacent red sub-pixel and green sub-pixel, and the distance between the edge of the protrusion protruding from the edge of the groove in each isolation part and the light-emitting region of the corresponding sub-pixel is small, which is beneficial to reducing the crosstalk between adjacent sub-pixels while balancing the display effects of different color sub-pixels and improving the image quality.

[0163] For example, asFigure 6 As shown, the extending direction of the second opening 220 located between adjacent sub-pixels intersects with the arrangement direction of the adjacent sub-pixels. For example, the dimension of the second opening 220 perpendicular to its extending direction and parallel to the substrate is referred to as its width, and the widths of different second openings 220 may be the same. However, it is not limited thereto, and the widths of different second openings 220 may also be different.

[0164] For example, Figure 6 Schematically shown are four second openings 220 surrounding the same sub-pixel arranged at intervals. However, it is not limited thereto. At least two second openings 220 may be connected second openings 220 as long as the second opening 220 does not expose the first electrode 110 of the sub-pixel.

[0165] For example, as Figure 6 shown, the planar shape of the second opening is bar-shaped, the length of the interval between the first isolation part and the second isolation part is greater than the length of the bar, and the width of the interval is less than the width of the bar. For example, a part of the orthographic projection of the interval on the substrate does not overlap with the orthographic projection of the second opening on the substrate.

[0166] Figure 8 and Figure 9 are schematic cross-sectional structural diagrams of a partial part of a display substrate provided according to different examples of the embodiments of the present disclosure.

[0167] Figure 8 In the example shown, the difference between the display substrate in the example shown and Figure 7 the display substrate in the example shown is that the distance between the edge of the first sub-opening 211 and the first protrusion 301 is greater than the distance between the edge of the second sub-opening 212 and the second protrusion 302. Figure 9 In the example shown, the difference between the display substrate in the example shown and Figure 7 the display substrate in the example shown is that the pixel defining part 230 between adjacent sub-pixels further includes a recessed part 240.

[0168] In some examples, as Figure 8 shown, the luminous efficiency of the first sub-pixel 101 is less than that of the second sub-pixel 102. The adjacent first openings 210 configured to define the light-emitting regions of adjacent sub-pixels include a first sub-opening 211 and a second sub-opening 212. The first sub-opening 211 is configured to define the light-emitting region of the first sub-pixel 101, the second sub-opening 212 is configured to define the light-emitting region of the second sub-pixel 102, and the distance D34 between the edge of the first sub-opening 211 and the first protrusion 301 is greater than the distance D35 between the edge of the second sub-opening 212 and the second protrusion 302.

[0169] By reducing the distance between the second protrusion 302 and the light-emitting region of the second sub-pixel 102 with higher luminous efficiency, it is beneficial to reduce the overlapping area between the charge generation layer 133 of the second sub-pixel 102 and the second electrode 120, reduce the capacitance between the two, and further improve the smear phenomenon generated by the second sub-pixel 102.

[0170] For example, as Figure 8 shown, the ratio of the distance D34 to the distance D35 is 1 to 2.

[0171] In some examples, the first sub-pixel 101 includes a blue sub-pixel, and the second sub-pixel 102 includes a green sub-pixel. However, it is not limited thereto. The first sub-pixel 101 can also be a red sub-pixel, the second sub-pixel 102 is a green sub-pixel, or the first sub-pixel 101 is a blue sub-pixel, and the second sub-pixel 102 is a red sub-pixel.

[0172] For example, as Figure 9 shown, at least one recess 240 is provided on the surface of the pixel defining portion 230 between adjacent sub-pixels away from the substrate 01 side. The depth of the recess 240 is not less than the thickness of the light-emitting functional layer 130, and the distance between the bottom 241 of the recess 240 and the substrate 01 is greater than the distance between the surface of the first electrode 110 away from the substrate 01 and the substrate 01.

[0173] By providing the recess 240 in the pixel defining portion 230 between adjacent sub-pixels, it is beneficial to extend the crosstalk path of the light-emitting functional layer 130. Thus, while alleviating the smear problem of the sub-pixels, the crosstalk between adjacent sub-pixels can be reduced.

[0174] Figure 9 The recess 240 provided in the display substrate shown can have the same characteristics as the recess 240 provided in the display substrate shown in Figures 4A to 5 and will not be elaborated here.

[0175] Figure 10 A partial plan view structure diagram of a display substrate is provided for another example according to an embodiment of the present disclosure. Figure 10 Schematically shows the relative positional relationship distribution of the second opening 220, the isolation layer 300, and the groove 410 in the display substrate and Figure 6 the relative positional relationship distribution of the second opening 220, the isolation layer 300, and the groove 410 in the display substrate shown is the same, but not limited thereto. Figure 10 The relative positional relationship distribution of the second opening 220, the isolation layer 300, and the groove 410 in the display substrate shown can also be the same as the relative positional relationship distribution of the second opening 220, the isolation layer 300, and the groove 410 in the display substrate shown in Figure 1 and the embodiments of the present disclosure do not limit this.

[0176] In some examples, such as Figure 10 As shown, the display substrate further includes: spacers 500, located on the side of the pixel defining portion 230 away from the substrate 01, and the orthographic projection of the spacers 500 on the substrate 01 does not overlap with the orthographic projection of the grooves 410 on the substrate 01.

[0177] While setting the second opening 220 to expose the isolation portion overlapping with the sub-pixels on both sides thereof, setting the spacers 500 to not overlap with the grooves 410 can reduce the crosstalk between adjacent sub-pixels while avoiding the position of the grooves 410 from affecting the performance of the spacers 500.

[0178] For example, in other examples, the orthographic projection of the spacers on the substrate does not overlap with the orthographic projection of the recessed portion on the substrate. For example, the spacers can be integrally provided with the pixel defining portion.

[0179] For example, as Figure 10 As shown, the spacers 500 are used to support a fine metal mask (FMM). For example, the spacers 500 support the fine metal mask for patterning to form a light-emitting layer.

[0180] For example, as Figure 10 As shown, the same spacers 500 are surrounded by four second openings 220.

[0181] For example, as Figure 10 As shown, the multiple sub-pixels include multiple blue sub-pixels 1011, multiple green sub-pixels 1012, and multiple red sub-pixels 1013. The red sub-pixels 1013 and the blue sub-pixels 1011 are alternately arranged along the U direction and the V direction, and the green sub-pixels 1012 are arranged in an array along the U direction and the V direction.

[0182] For example, as Figure 10 As shown, multiple spacers 500 are arranged in an array along the X direction and the Y direction, and three second openings 220 are provided between two adjacent spacers 500.

[0183] The pixel arrangement methods in the various embodiments described in the present disclosure may all be the same as Figure 10 the pixel arrangement method shown.

[0184] Such as Figure 10 As shown, the isolation portions of the isolation layer 300 that overlap with different sub-pixels may be an integrally provided structure, but are not limited thereto, and at least two isolation portions may be spaced apart.

[0185] Figure 11 It is a partial plan view structure diagram of a display substrate provided according to another embodiment of the present disclosure. Figure 12 Along Figure 11Schematic diagram of a partial cross-sectional structure intercepted by the line CC'.

[0186] As shown in Figure 11 and Figure 12 the display substrate includes a substrate substrate 01, a plurality of sub-pixels 100 located on the substrate substrate 01, a pixel defining pattern 200, and an insulating layer 400. Each of at least some of the sub-pixels 100 includes a first electrode 110, a light-emitting functional layer 130, and a second electrode 120 arranged in a stacked manner. The first electrode 110 is located between the light-emitting functional layer 130 and the substrate substrate 01, and the light-emitting functional layer 130 includes a plurality of film layers. For example, the display substrate includes a display area and a peripheral area surrounding the display area. The plurality of sub-pixels are located in the display area of the display substrate. The pixel defining pattern 200 may include a portion located in the display area and a portion located in the peripheral area. The isolation layer 300 may include a portion located in the display area and a portion located in the peripheral area. The insulating layer 400 may include a portion located in the display area and a portion located in the peripheral area.

[0187] For example, Figure 11 and Figure 12 in the embodiments shown, the first electrode 110, the light-emitting functional layer 130, and the second electrode 120 of the sub-pixel may have the same characteristics as the corresponding structures of the sub-pixels in Figure 1 and Figure 2 shown embodiments, and will not be described in detail herein.

[0188] As shown in Figure 11 and Figure 12 the pixel defining pattern 200 is located on the side of the first electrode 110 away from the substrate substrate 01. The pixel defining pattern 200 includes a plurality of first openings 210, a plurality of second openings 220, and a pixel defining portion 230 surrounding the plurality of first openings 210 and the plurality of second openings 220. The plurality of first openings 210 are configured to expose the first electrodes 110 of the plurality of sub-pixels 100. For example, the second openings 220 are located in the display area. The first openings 210 of the pixel defining pattern 200 in this embodiment have the same characteristics as the first openings 210 in Figure 1 and Figure 2 shown embodiments, and will not be described in detail herein.

[0189] As shown in Figure 11 and Figure 12As shown, an insulating layer 400 is located between the first electrode 110 and the substrate 01. At least one recess 240 is provided on the surface of the pixel defining portion 230 between adjacent sub-pixels 100 away from the substrate 01. The depth of the recess 240 is not less than the thickness of the light-emitting functional layer 130, and the distance between the bottom 241 of the recess 240 and the substrate 01 is greater than the distance between the surface of the first electrode 110 away from the substrate 01 and the substrate 01. The cross-section of each recess 240 in at least one recess 240 intercepted by a plane parallel to the arrangement direction of adjacent sub-pixels and perpendicular to the substrate 01 includes two side edges 242 and a bottom edge 2410. Along the direction of the insulating layer 400 away from the substrate 01, the distance between the two side edges 242 gradually increases, and the angle α at the connection of at least one side edge 242 and the bottom edge 2410 is 100 to 110 degrees.

[0190] The above-mentioned "arrangement direction of adjacent sub-pixels" may be Figure 11 the X direction shown, but is not limited thereto, and may also be Figure 1 the Y direction shown, or the arrangement direction of sub-pixels arranged in other directions. The above-mentioned "plane parallel to the arrangement direction of adjacent sub-pixels and perpendicular to the substrate 01" may be the XZ plane. The above-mentioned "direction of the insulating layer 400 away from the substrate 01" is perpendicular to the substrate 01 and is the direction from the substrate 01 to the insulating layer 400, such as the Z direction. For example, in the direction away from the substrate 01, the two relatively arranged side edges 242 of the recess 240 are inclined away from each other. For example, the angle α is the angle between the side wall of the recess 240 and the surface of the bottom 241.

[0191] For example, as Figure 12 shown, the light-emitting functional layer 130 is disconnected in the recess 240, and the second electrode 120 is continuously provided in the recess 240. By setting the depth of the recess 240 and the inclination angle of the side edge 242, the second electrode 120 can be continuously provided in the recess 240. For example, in other examples, both the light-emitting functional layer 130 and the second electrode 120 are disconnected in the recess 240, or some film layers of the light-emitting functional layer 130 are disconnected in the recess 240, and the second electrode 120 is continuously provided in the recess 240.

[0192] Such as Figure 12 shown, the insulating layer 400 includes a groove 410 located between adjacent sub-pixels, and at least part of the groove 410 is exposed by the second opening 220.

[0193] By providing the groove 410 exposed by the second opening 220 in the insulating layer 400 and setting the recess 240 in the pixel defining portion 230 at the same time, it is beneficial to extend the path of the light-emitting functional layer 130 and reduce the crosstalk between adjacent sub-pixels.

[0194] For example, as Figure 12 shown, the depth of the groove 410 may be the same as that of the groove 410 in the above embodiments, and will not be described in detail herein.

[0195] For example, as Figure 12 shown, the angle α is 100 degrees or 110 degrees. For example, the angle α is 103 - 107 degrees. For example, the angle α is 105 - 109 degrees. For example, the angle α is 102 - 106 degrees. In the embodiments of the present disclosure, the specific values of the angle α will not be listed one by one, and it may be any value between 100 - 110 degrees. Figure 11 It is schematically shown that both the side edge 242 and the bottom edge 2410 of the cross-section of the recess 240 are straight lines, and the angle α is the included angle at the connection of the two straight lines, but not limited thereto. At least one of the side edge 242 and the bottom edge 2410 may be a curve, and the angle α may be the tangent angle at the connection of the side edge 242 and the bottom edge 2410.

[0196] For example, as Figure 12 shown, the light-emitting functional layer 130 in the second opening 220 is disconnected, the second electrode 120 is continuously provided, and the thickness of the second electrode 120 on the side wall of the second opening 220 is less than the thickness of the second electrode 120 in the first opening 210.

[0197] However, it is not limited thereto. The inclination angle of the side wall of the second opening 220 formed by the pixel defining portion 230 and the depth of the groove 410 in the insulating layer 400 can be adjusted to isolate the light-emitting functional layer 130 and the second electrode 120.

[0198] In some examples, as Figure 12 shown, the thickness of the part of the light-emitting functional layer 130 on the side wall 2420 of at least one recess 240 is less than the thickness of the part of the light-emitting functional layer 130 in the first opening 210.

[0199] By providing the recess 240 in the pixel defining portion 230, the thickness of the light-emitting functional layer 130 at the side wall of the recess 240 can be reduced, the resistance of the charge generation layer 133 is increased, the crosstalk path of the charge generation layer 133 is extended, which is beneficial to reducing the crosstalk between adjacent sub-pixels.

[0200] For example, as Figure 12 shown, the thickness of the part of the second electrode 120 on the side wall 2420 is less than the thickness of the part of the second electrode 120 in the first opening 210.

[0201] In some examples, as Figure 12 shown, the orthographic projection of the bottom 241 of the recess 240 on the substrate 01 does not overlap with the orthographic projection of the first electrode 110 on the substrate 01.

[0202] By setting the relative positional relationship between the recessed portion 240 and the first electrode 110, it is possible to reduce the crosstalk between adjacent sub-pixels in the recessed portion 240 while avoiding the influence of the position of the recessed portion 240 on the performance of the first electrode 110.

[0203] For example, as Figure 12 shown, the orthographic projection of the side wall 2420 of the recessed portion 240 on the substrate 01 may overlap or not overlap with the orthographic projection of the first electrode 110 on the substrate 01.

[0204] For example, as Figure 12 shown, the cross-section of the recessed portion 240 may be the cross-section of a strip-shaped recessed portion 240 extending in a direction perpendicular to the XZ plane, or may be the cross-section of one of a plurality of recessed portions 240 arranged in a direction perpendicular to the XZ plane.

[0205] For example, as Figure 12 shown, the second opening 220 exposes a part of the groove 410.

[0206] In some examples, as Figure 12 shown, along the arrangement direction of adjacent sub-pixels, the notch of the groove 410 includes a first edge 411 and a second edge 412 which are oppositely arranged, and the pixel defining portion 230 covers the first edge 411 and the second edge 412. The pixel defining portion covering the first edge and the second edge is beneficial to increasing the height of the pixel defining portion at the second opening, making it easier for the light-emitting functional layer to be disconnected on the pixel defining portion surrounding the second opening.

[0207] In some examples, as Figure 12 shown, the first electrode 110 is in contact with the insulating layer 400, and the material of the insulating layer 400 includes an organic material.

[0208] For example, the insulating layer 400 may be a planarization layer, and the material of the insulating layer 400 may include materials such as polyimide.

[0209] By setting the first electrode 110 to be directly in contact with the insulating layer 400, it is beneficial to improve the flatness of the first electrode 110.

[0210] Figures 13 to 15 It is a schematic diagram of a partial cross-sectional structure of a display substrate provided for different examples of another embodiment of the present disclosure. Figure 13 Different from Figure 12 the display substrate in the example shown is that the relative positional relationship between the recessed portion 240 and the first electrode 110 is different. Figure 14 Different from Figure 12 the display substrate in the example shown is that the number of the recessed portions 240 is different. Figure 15 Different from Figure 12In the illustrated example, the difference in the substrate shown lies in the different portions of the groove 410 exposed by the second opening 220.

[0211] In some examples, as Figure 13 shown, along the direction perpendicular to the substrate 01, the bottom 241 of the recess 240 overlaps with the first electrode 110, and the distance between the bottom 241 of the recess 240 and the first electrode 110 is greater than 2000 angstroms.

[0212] When the recess 240 overlaps with the first electrode 110, by defining the distance between the bottom 241 of the recess 240 and the first electrode 110, it is possible to prevent the recess 240 from affecting the characteristics of the first electrode 110.

[0213] For example, as Figure 13 shown, the distance between the bottom 241 of the recess 240 and the first electrode 110 is greater than 3000 angstroms, or greater than 5000 angstroms, etc. While the depth of the recess 240 is greater than the thickness of the light-emitting functional layer 130, the distance between the bottom 241 of the recess 240 and the first electrode 110 can be any value greater than 2000 angstroms, and specific values of this angle are not listed one by one in the embodiments of the present disclosure.

[0214] In some examples, as Figure 14 shown, at least one recess 240 includes a plurality of recesses 240, and along the arrangement direction of adjacent sub-pixels, recesses 240 are provided on both sides of the second opening 220 located between adjacent sub-pixels.

[0215] By providing recesses 240 on both sides of the second opening 220, it is beneficial to further extend the crosstalk path of the light-emitting functional layer 130 and reduce crosstalk between adjacent sub-pixels.

[0216] For example, as Figure 14 shown, the pixel defining portion 230 located on one side of the second opening 220 may include at least one recess 240, and the pixel defining portion 230 located on the other side of the second opening 220 may include at least one recess 240.

[0217] For example, Figure 14 shown, the cross-section of each recess 240 can be the cross-section of a strip-shaped recess 240 extending in the direction perpendicular to the XZ plane, or can include the cross-section of one of the plurality of recesses 240 arranged in the direction perpendicular to the XZ plane.

[0218] In some examples, as Figure 15 shown, along the arrangement direction of adjacent sub-pixels, the notch of the groove 410 includes a first edge 411 and a second edge 412 which are oppositely arranged, and the second opening 220 exposes at least one of the first edge 411 and the second edge 412.

[0219] By exposing at least one of the first edge 411 and the second edge 412 through the second opening 220, the path of the light-emitting functional layer 130 can be further extended to reduce the crosstalk between adjacent sub-pixels. In addition, by setting the inclination angle of the sidewall of the groove 410, the edge of the groove 410 exposed by the second opening 220 can play a role in isolating the light-emitting functional layer 130, so as to further reduce the crosstalk between adjacent sub-pixels.

[0220] Figure 16 A schematic diagram of a partial cross-sectional structure of a display substrate provided according to yet another example of yet another embodiment of the present disclosure. Figure 16 The display substrate shown is Figures 12 to 15 The difference between the display substrate shown is that the display substrate further includes an isolation layer 300 .

[0221] In some examples, such as Figure 16 As shown, the display substrate further includes an isolation layer 300, which is located between the first electrode 110 and the insulating layer 400. The two side surfaces of the isolation layer 300 are in contact with the first electrode 110 and the insulating layer 400 respectively. The material of the isolation layer 300 includes an inorganic non-metallic material, and the material of the insulating layer 400 includes an organic material. The adjacent sub-pixels include a first sub-pixel 101 and a second sub-pixel 102. The luminous efficiency of the first sub-pixel 101 is less than the luminous efficiency of the second sub-pixel 102. The isolation layer 300 includes a first isolation portion 310 and a second isolation portion 320. The first isolation portion 310 overlaps with the first electrode 110 of the first sub-pixel 101, and the second isolation portion 320 overlaps with the first electrode 110 of the second sub-pixel 102.

[0222] For example, Figure 16 As shown, the orthographic projection of the first electrode 110 on the base substrate 01 is completely located within the orthographic projection of the isolation layer 300 on the base substrate 01 .

[0223] For example, Figure 16 As shown, the material of the isolation layer 300 may include silicon nitride or silicon oxide. For example, the insulating layer 400 may be a planarization layer, and the material of the insulating layer 400 may include materials such as polyimide. For example, after the insulating layer 400 is formed on the substrate 01, the isolation layer 300 is formed, and the isolation layer 300 is etched with an etching liquid to form the first isolation portion 310, the second isolation portion 320 and the groove 410. Since the etching selectivity of the etching liquid to the material of the insulating layer 400 is greater than the etching selectivity of the etching liquid to the material of the isolation layer 300, the edge of the groove 410 formed after etching is retracted relative to the isolation layer 300, such as the edge of the first isolation portion 310 and the second isolation portion 320. By setting the first electrode 110 so that its orthographic projection is completely located within the orthographic projection of the isolation layer 300, it is beneficial to improve the flatness of the first electrode 110.

[0224] For example, Figure 16 As shown, the first sub-pixel 101 includes a blue sub-pixel, and the second sub-pixel 102 includes a green sub-pixel. However, it is not limited thereto, the first sub-pixel 101 may also be a red sub-pixel, and the second sub-pixel 102 may be a green sub-pixel, or the first sub-pixel 101 may be a blue sub-pixel, and the second sub-pixel 102 may be a red sub-pixel.

[0225] In some examples, such as Figure 16 As shown, the notch of the groove 410 includes a first edge 411 and a second edge 412 arranged opposite to each other, the first isolation portion 310 includes a first protrusion 301 protruding relative to the first edge 411, the second isolation portion 320 includes a second protrusion 302 protruding relative to the second edge 412, the pixel defining portion 230 covers the first protrusion 301 and the second opening 220 exposes the second protrusion 302. For example, the second protrusion 302 is configured to separate the light emitting function layer 130 and the second electrode 120.

[0226] By setting the positional relationship among the pixel defining portion 230, the second opening 220, the first protrusion 301 and the second protrusion 302, a recessed portion 240 is provided on the pixel defining portion 230, which helps to extend the crosstalk path of the light-emitting functional layer 130 and improve the crosstalk problem between the first sub-pixel 101 and the second sub-pixel 102.

[0227] Figure 16 It is schematically shown that a recessed portion is provided on one side of the second opening, but the present invention is not limited thereto, and recessed portions may be provided on both sides of the second opening.

[0228] Figure 16 The other structures in the display substrate except the isolation layer can be Figure 12 The corresponding structures in the display substrate shown have the same features, which will not be described in detail here.

[0229] Figure 17 FIG. 1 is a schematic block diagram of a display device according to another embodiment of the present disclosure. Figure 17 As shown, a display device provided by an embodiment of the present disclosure includes any one of the above-mentioned display substrates.

[0230] For example, the display device may be provided with a color filter layer or may not be provided with a color filter layer.

[0231] For example, the display device further includes a cover plate located on the light emitting side of the display substrate.

[0232] For example, the display device may be a display device such as an organic light-emitting diode display device, and any product or component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a laptop computer, a navigator, etc., including the display device. The present embodiment is not limited thereto.

[0233] The following points need to be noted:

[0234] (1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can refer to the general design.

[0235] (2) Without conflict, the features in the same embodiment and different embodiments of the present disclosure can be combined with each other.

[0236] The above description is only an exemplary embodiment of the present disclosure, rather than used to limit the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A display substrate, comprising: substrate substrate; A plurality of sub-pixels are located on the base substrate, each of at least some of the sub-pixels comprises a first electrode, a light-emitting functional layer and a second electrode which are stacked, the first electrode is located between the light-emitting functional layer and the base substrate, and the light-emitting functional layer comprises a plurality of film layers; a pixel defining pattern located at a side of the first electrode away from the base substrate, the pixel defining pattern comprising a plurality of first openings, a plurality of second openings, and a pixel defining portion surrounding the plurality of first openings and the plurality of second openings, the plurality of first openings being configured to expose the first electrodes of the plurality of sub-pixels; An isolation layer, located between the first electrode and the substrate; an insulating layer, located between the isolation layer and the substrate, The insulating layer includes a groove located between adjacent sub-pixels, the notch of the groove includes a first edge exposed by the second opening, the isolation layer includes a first protrusion protruding relative to the first edge, and the first protrusion is configured to separate at least one layer of the light-emitting functional layer; The adjacent sub-pixels include a first sub-pixel and a second sub-pixel, the luminous efficiency of the first sub-pixel is lower than the luminous efficiency of the second sub-pixel, the isolation layer includes a first isolation portion and a second isolation portion, the first isolation portion overlaps with the first electrode of the first sub-pixel, the second isolation portion overlaps with the first electrode of the second sub-pixel, and the first isolation portion includes the first protrusion; The notch of the groove includes a second edge, the second isolation portion includes a second protrusion protruding relative to the second edge, and the pixel defining portion covers the second protrusion and a portion of the groove.

2. The display substrate according to claim 1, wherein: The light-emitting functional layer and the second electrode are both disconnected at the edge of the first protrusion, the light-emitting functional layer includes a charge generating layer, the charge generating layer and the second electrode are in contact on the side of the first protrusion away from the base substrate, and the charge generating layer and the second electrode are spaced apart on the side of the first protrusion close to the base substrate.

3. The display substrate according to claim 1, wherein: The light-emitting functional layer and the second electrode are both disconnected at the edge of the first protrusion, and are configured such that the ratio of the distance between the adjacent first openings defining the light-emitting areas of the adjacent sub-pixels and the edge of the first protrusion is 0.95-1.

05.

4. The display substrate according to claim 1, wherein: The light-emitting functional layer and the second electrode are both disconnected at the edge of the first protrusion, and the adjacent first opening configured to define the light-emitting area of ​​the adjacent sub-pixel includes a first sub-opening and a second sub-opening, the first sub-opening is configured to define the light-emitting area of ​​the first sub-pixel, and the second sub-opening is configured to define the light-emitting area of ​​the second sub-pixel, and the distance between the first sub-opening and the edge of the first protrusion is greater than the distance between the second sub-opening and the edge of the first protrusion.

5. The display substrate according to claim 3, wherein: The adjacent first openings configured to define the light-emitting areas of the adjacent sub-pixels include a first sub-opening and a second sub-opening, and the distances between the second opening located between the first sub-opening and the second sub-opening and the first sub-opening and the second sub-opening are respectively a first distance and a second distance, and the ratio of the first distance to the second distance is 0.95 to 1.

05.

6. The display substrate according to claim 4, wherein: The distance between the second opening located between the first sub-opening and the second sub-opening and the first sub-opening is a first distance, the distance between the second opening and the second sub-opening is a second distance, and the first distance is greater than the second distance.

7. The display substrate according to claim 1, wherein: The first sub-pixel includes a blue sub-pixel, and the second sub-pixel includes a green sub-pixel.

8. A display substrate, comprising: substrate substrate; A plurality of sub-pixels are located on the base substrate, each of at least some of the sub-pixels comprises a first electrode, a light-emitting functional layer and a second electrode which are stacked, the first electrode is located between the light-emitting functional layer and the base substrate, and the light-emitting functional layer comprises a plurality of film layers; a pixel defining pattern located at a side of the first electrode away from the base substrate, the pixel defining pattern comprising a plurality of first openings, a plurality of second openings, and a pixel defining portion surrounding the plurality of first openings and the plurality of second openings, the plurality of first openings being configured to expose the first electrodes of the plurality of sub-pixels; An isolation layer, located between the first electrode and the substrate; an insulating layer, located between the isolation layer and the substrate, The insulating layer includes a groove between adjacent sub-pixels, the adjacent sub-pixels include a first sub-pixel and a second sub-pixel, the isolation layer includes a first isolation portion and a second isolation portion, the first isolation portion overlaps with a first electrode of the first sub-pixel, the second isolation portion overlaps with a first electrode of the second sub-pixel, the first isolation portion includes a first protrusion protruding relative to an edge of a notch of the groove, the second isolation portion includes a second protrusion protruding relative to an edge of the notch, and the first protrusion and the second protrusion are both configured to isolate at least one layer of the light-emitting functional layer; The second opening exposes at least a portion of the groove, and along the arrangement direction of the adjacent sub-pixels, a dimension of at least one of the first isolation portion and the second isolation portion exposed by the second opening is smaller than a distance between the first protrusion and the second protrusion.

9. The display substrate according to claim 8, wherein: The first protrusion and the second protrusion are both exposed by the second opening to separate the light-emitting functional layer and the second electrode, and along the arrangement direction, the dimensions of the first isolation portion and the second isolation portion exposed by the second opening are both smaller than the distance between the first protrusion and the second protrusion.

10. The display substrate according to claim 8, wherein: The adjacent first opening configured to define the light-emitting area of ​​the adjacent sub-pixel includes a first sub-opening and a second sub-opening, the first sub-opening is configured to define the light-emitting area of ​​the first sub-pixel, the second sub-opening is configured to define the light-emitting area of ​​the second sub-pixel, and the ratio of the distance between the first sub-opening and the edge of the first protrusion to the distance between the second sub-opening and the edge of the second protrusion is 0.95 to 1.

05.

11. The display substrate according to claim 8, wherein: The luminous efficiency of the first sub-pixel is less than that of the second sub-pixel, and the adjacent first opening configured to define the luminous area of ​​the adjacent sub-pixel includes a first sub-opening and a second sub-opening, the first sub-opening is configured to define the luminous area of ​​the first sub-pixel, and the second sub-opening is configured to define the luminous area of ​​the second sub-pixel, and the distance between the first sub-opening and the edge of the first protrusion is greater than the distance between the second sub-opening and the edge of the second protrusion.

12. The display substrate according to claim 10, wherein: The first sub-pixel and the second sub-pixel are two different color sub-pixels among a blue sub-pixel, a green sub-pixel and a red sub-pixel.

13. The display substrate according to claim 11, wherein: The first sub-pixel includes a blue sub-pixel, and the second sub-pixel includes a green sub-pixel.

14. The display substrate according to any one of claims 1 to 13, wherein: The material of the isolation layer includes an inorganic non-metallic material, the material of the insulating layer includes an organic material, the two side surfaces of the isolation layer are in contact with the first electrode and the insulating layer respectively, and the orthographic projection of the first electrode on the base substrate is completely located within the orthographic projection of the isolation layer on the base substrate.

15. The display substrate according to any one of claims 1 to 13, wherein: A pixel defining portion between adjacent sub-pixels is provided with at least one recessed portion on a surface away from the base substrate, wherein a depth of the recessed portion is not less than a thickness of the light-emitting functional layer, and a distance between a bottom of the recessed portion and the base substrate is greater than a distance between a surface of the first electrode away from the base substrate and the base substrate.

16. The display substrate according to claim 15, wherein: The at least one recessed portion includes a plurality of recessed portions, and along the arrangement direction of the adjacent sub-pixels, the recessed portions are disposed on both sides of the first protruding portion between the adjacent sub-pixels.

17. The display substrate according to claim 15, wherein: Each of the at least one recessed portion has a cross section cut by a plane parallel to the arrangement direction of the adjacent sub-pixels and perpendicular to the substrate, including two side edges and a bottom edge. Along the direction of the insulating layer away from the substrate, the distance between the two side edges gradually increases, and the angle at which at least one side edge is connected to the bottom edge is 100 to 110 degrees.

18. The display substrate according to claim 15, wherein: A thickness of a portion of the light-emitting functional layer on a side wall of the at least one recessed portion is smaller than a thickness of a portion of the light-emitting functional layer in the first opening.

19. The display substrate according to claim 15, wherein: An orthographic projection of a bottom of the recessed portion on the base substrate does not overlap with an orthographic projection of the first electrode on the base substrate.

20. The display substrate according to claim 15, wherein: Along a direction perpendicular to the base substrate, the bottom of the recessed portion overlaps with the first electrode, and a distance between the bottom of the recessed portion and the first electrode is greater than 2000 angstroms.

21. The display substrate according to any one of claims 1 to 13, further comprising: a spacer, located at a side of the pixel defining portion away from the base substrate, The orthographic projection of the spacer on the base substrate does not overlap with the orthographic projection of the groove on the base substrate.

22. A display substrate, comprising: substrate substrate; A plurality of sub-pixels are located on the base substrate, each of at least some of the sub-pixels comprises a first electrode, a light-emitting functional layer and a second electrode which are stacked, the first electrode is located between the light-emitting functional layer and the base substrate, and the light-emitting functional layer comprises a plurality of film layers; a pixel defining pattern located at a side of the first electrode away from the base substrate, the pixel defining pattern comprising a plurality of first openings, a plurality of second openings, and a pixel defining portion surrounding the plurality of first openings and the plurality of second openings, the plurality of first openings being configured to expose the first electrodes of the plurality of sub-pixels; an insulating layer, located between the first electrode and the base substrate, Wherein, at least one recessed portion is provided on a surface of a pixel defining portion between adjacent sub-pixels away from the substrate, the depth of the recessed portion is not less than the thickness of the light-emitting functional layer, and the distance between the bottom of the recessed portion and the substrate is greater than the distance between the surface of the first electrode away from the substrate and the substrate; A cross section of each of the at least one recessed portion cut by a plane parallel to the arrangement direction of the adjacent sub-pixels and perpendicular to the substrate includes two side edges and a bottom edge, and a distance between the two side edges gradually increases along a direction in which the insulating layer is away from the substrate, and an angle at which at least one side edge is connected to the bottom edge is 100 to 110 degrees; The insulating layer includes a groove between adjacent sub-pixels, and the second opening exposes at least a portion of the groove.

23. The display substrate according to claim 22, further comprising: an isolation layer, located between the first electrode and the insulating layer, wherein two side surfaces of the isolation layer are in contact with the first electrode and the insulating layer respectively, wherein the material of the isolation layer comprises an inorganic non-metallic material, and the material of the insulating layer comprises an organic material, The adjacent sub-pixels include a first sub-pixel and a second sub-pixel, the luminous efficiency of the first sub-pixel is less than the luminous efficiency of the second sub-pixel, the isolation layer includes a first isolation portion and a second isolation portion, the first isolation portion overlaps with a first electrode of the first sub-pixel, and the second isolation portion overlaps with a first electrode of the second sub-pixel; The notch of the groove includes a first edge and a second edge arranged opposite to each other, the first isolation portion includes a first protrusion protruding relative to the first edge, the second isolation portion includes a second protrusion protruding relative to the second edge, the pixel defining portion covers the first protrusion and the second opening exposes the second protrusion.

24. The display substrate according to claim 22, wherein: The first electrode contacts the insulating layer, and a material of the insulating layer includes an organic material.

25. The display substrate according to claim 24, wherein: The at least one recessed portion includes a plurality of recessed portions, and along the arrangement direction of the adjacent sub-pixels, the recessed portions are disposed on both sides of the second opening between the adjacent sub-pixels.

26. The display substrate according to claim 24, wherein: Along the arrangement direction of the adjacent sub-pixels, the notch of the groove includes a first edge and a second edge that are oppositely arranged, and the pixel defining portion covers the first edge and the second edge.

27. The display substrate according to claim 24, wherein: Along the arrangement direction of the adjacent sub-pixels, the notch of the groove includes a first edge and a second edge that are oppositely arranged, and the second opening exposes at least one of the first edge and the second edge.

28. The display substrate according to any one of claims 22 to 27, wherein: A thickness of a portion of the light-emitting functional layer on a side wall of the at least one recessed portion is smaller than a thickness of a portion of the light-emitting functional layer in the first opening.

29. The display substrate according to any one of claims 22 to 27, wherein: An orthographic projection of a bottom of the recessed portion on the base substrate does not overlap with an orthographic projection of the first electrode on the base substrate.

30. The display substrate according to any one of claims 22 to 27, wherein: Along a direction perpendicular to the base substrate, the bottom of the recessed portion overlaps with the first electrode, and a distance between the bottom of the recessed portion and the first electrode is greater than 2000 angstroms.

31. A display device comprising the display substrate according to any one of claims 1 to 30.

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