Display substrate, display panel and display device

Abstract

The invention discloses a display substrate, a display panel and a display device. The display substrate comprises sub-pixels, a pixel limiting layer, a first limiting structure and a supporting structure, the pixel limiting layer comprises a plurality of openings and a pixel limiting part, the plurality of openings comprise a plurality of first openings and a plurality of second openings, the first limiting structure comprises a first part overlapped with the pixel limiting part and a second part exposed by the second openings, and the supporting structure comprises a second part exposed by the second openings. The second part of the first limiting structure is configured to partition at least one layer of the light-emitting functional layers; the minimum distance between the orthographic projection of the supporting structure on the substrate and the orthographic projection of the first limiting structure on the substrate is a first distance, the minimum distance between the orthographic projection of the supporting structure on the substrate and the orthographic projection of the first limiting structure on the substrate is a second distance, and the first distance and the second distance are both larger than 0 micrometer and smaller than 10 micrometers. The light-emitting functional layer is separated to reduce crosstalk, and meanwhile, the supporting structure has a good shape and provides reliable supporting force.

Description

Display substrate, display panel, and display device

[0001] This application claims priority to patent application No. PCT / CN2023 / 143095 filed on December 29, 2023, and the contents of the above patent application disclosure are hereby incorporated by reference in their entirety as a part of this application for all purposes. Technical Field

[0002] The present disclosure relates to a display substrate, a display panel, and a display device. Background Art

[0003] Organic light-emitting diode (OLED) displays are highly popular among users due to their rich colors, fast response time, and foldability. An organic light-emitting diode (OLED) display with a tandem structure increases the lifespan and brightness of the OLED by adding at least one light-emitting layer and a charge-generating layer to the OLED, while reducing power consumption, thus meeting user demands for both power consumption and lifespan.

[0004] Summary of the Invention

[0005] Embodiments of the present disclosure provide a display substrate, a display panel, and a display device.

[0006] At least one embodiment of the present disclosure provides a display substrate, comprising a base substrate, a plurality of sub-pixels, a pixel-defining layer, and at least one first defining structure, wherein the plurality of sub-pixels are located on the base substrate, the sub-pixels include a light-emitting functional layer, and the light-emitting functional layer includes a plurality of film layers; the pixel-defining layer includes a plurality of openings and a pixel-defining portion surrounding the plurality of openings, the plurality of openings including a plurality of first openings and a plurality of second openings, the first openings being configured to define a light-emitting area of ​​the sub-pixels, at least a portion of at least one layer of the light-emitting functional layer located in the first openings is continuous, and at least a portion located in the second openings is blocked; the first defining structure includes a first portion overlapping with the pixel-defining portion and a second portion exposed by the second openings, the second portion of the first defining structure being configured to block the at least one layer of the light-emitting functional layer; wherein the display substrate further comprises at least one supporting structure, the minimum distance between the orthographic projection of the supporting structure on the base substrate and the orthographic projection of the first defining structure on the base substrate being a first distance, the minimum distance between the orthographic projection of the supporting structure on the base substrate and the orthographic projection of the second opening on the base substrate being a second distance, and both the first distance and the second distance are greater than 0 micrometers and less than 10 micrometers.

[0007] For example, according to the display substrate provided by at least one embodiment of the present disclosure, both the first distance and the second distance are not less than 2 micrometers.

[0008] For example, in the display substrate provided according to at least one embodiment of the present disclosure, a straight-line distance between any two points on an edge of a cross section of the support structure cut by a plane parallel to the base substrate is no more than 20 micrometers.

[0009] For example, in a display substrate provided according to at least one embodiment of the present disclosure, at least a portion of the surface of the supporting structure away from the base substrate is further away from the base substrate than the pixel defining portion, and a cross-section of the supporting structure cut by a plane parallel to the base substrate is circular, elliptical or polygonal.

[0010] For example, in the display substrate provided according to at least one embodiment of the present disclosure, the size of the support structure is no greater than 10 micrometers in a direction perpendicular to the base substrate.

[0011] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the first portion of the first defining structure covers the pixel defining portion, and a slope angle is formed between at least a portion of the side surface of the first portion of the first defining structure away from the second portion and the first surface of the first portion close to the base substrate, and an angle between at least a portion of the side surface and a portion of the first surface close to the second portion is less than 90 degrees.

[0012] For example, according to the display substrate provided by at least one embodiment of the present disclosure, in the arrangement direction of adjacent sub-pixels, the maximum dimension of a cross-section of the first limiting structure located between the adjacent sub-pixels cut by a plane is a first dimension, and the maximum dimension of a cross-section of the first part of the first limiting structure cut by the plane is a second dimension, the second dimension is not less than 1 / 2 of the first dimension and not greater than 10 microns, the plane is parallel to the arrangement direction of the adjacent sub-pixels, and the plane is perpendicular to the base substrate.

[0013] For example, according to a display substrate provided by at least one embodiment of the present disclosure, the plurality of sub-pixels include a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels, the first sub-pixels, the second sub-pixels, and the third sub-pixels constitute a repeating unit, the first sub-pixels and the second sub-pixels in the repeating unit are arranged in sequence in a first arrangement direction, the first sub-pixels and the second sub-pixels are located on one side of the third sub-pixel in a second arrangement direction, and the first arrangement direction intersects with the second arrangement direction.

[0014] For example, in a display substrate provided according to at least one embodiment of the present disclosure, a first limiting structure and a second opening are arranged between any two adjacent sub-pixels among the first sub-pixel, the second sub-pixel and the third sub-pixel, the distances between the light-emitting areas of the adjacent sub-pixels and the second opening located between the adjacent sub-pixels are not equal, and the second portion of the first limiting structure is located between its first portion and the light-emitting area of ​​the sub-pixel among the adjacent sub-pixels adjacent to the second opening.

[0015] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the length of an edge of the first defining structure close to the first opening of the sub-pixel is smaller than the length of an edge of the second opening close to the first opening of the sub-pixel, and both ends of the second opening in its extension direction are located on both sides of the two ends of the first defining structure overlapping with it.

[0016] For example, according to a display substrate provided by at least one embodiment of the present disclosure, the multiple sub-pixels include multiple first sub-pixels, multiple second sub-pixels and multiple third sub-pixels, and the multiple sub-pixels are arranged as multiple first sub-pixel groups and multiple second sub-pixel groups alternately arranged along a first arrangement direction, the first sub-pixel group includes the first sub-pixels and the second sub-pixels alternately arranged along a second arrangement direction, the second sub-pixel group includes the third sub-pixels arranged along the second arrangement direction, and the first arrangement direction intersects with the second arrangement direction; the first sub-pixel group and the second sub-pixel group are staggered in the second arrangement direction, and each first sub-pixel in at least part of the first sub-pixels is surrounded by eight sub-pixels, and the eight sub-pixels include the second sub-pixels and the third sub-pixels alternately arranged.

[0017] For example, a display substrate provided according to at least one embodiment of the present disclosure includes: a first area, a second area and a third area, the first area is configured for display, at least part of the sub-pixels in the plurality of sub-pixels are located in the first area; the first area is located on at least one side of the second area; the third area is located between the first area and the second area, wherein the display substrate includes at least one second defining structure located in the third area, the positive projection of the second defining structure on the base substrate is annular and surrounds the second area, the material of the second defining structure is the same as the material of the first defining structure, and at least one film layer in the light-emitting functional layer is separated by the edge portion of the second defining structure that does not overlap with the pixel defining portion.

[0018] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the multiple openings in the pixel defining layer include a third opening, the third opening is located in the third region, and is configured to expose at least a portion of the second defining structure, wherein the at least one second defining structure includes at least one of a first sub-defining structure and a second sub-defining structure, the first sub-defining structure is completely exposed by the third opening, the second sub-defining structure includes a third portion overlapping with the pixel defining portion and a fourth portion exposed by the third opening, and the fourth portion of the second sub-defining structure is configured to isolate the at least one layer of the light-emitting functional layer.

[0019] For example, according to at least one embodiment of the present disclosure, a display substrate is provided, wherein the display substrate further includes a third defining structure, wherein the third defining structure is located in the third region, and the third defining structure is located between the second defining structure and the second region, the pixel defining portion is located on a side of the third defining structure away from the second region, and the third defining structure is configured to isolate at least one film layer of the light-emitting functional layer.

[0020] For example, according to at least one embodiment of the present disclosure, in a display substrate provided, a surface edge of at least one of the first defining structure, the second defining structure, and the third defining structure away from the base substrate protrudes relative to a surface edge close to the base substrate.

[0021] For example, according to the display substrate provided by at least one embodiment of the present disclosure, the first portion of the first limiting structure is covered by the pixel limiting portion, the area of ​​the light-emitting area of ​​the third sub-pixel is smaller than the area of ​​the light-emitting area of ​​the second sub-pixel, and the distance between the second opening located between the second sub-pixel and the third sub-pixel and the light-emitting area of ​​the third sub-pixel is not less than the distance between the second opening and the light-emitting area of ​​the second sub-pixel.

[0022] For example, in a display substrate provided according to at least one embodiment of the present disclosure, in the arrangement direction of adjacent sub-pixels, the maximum dimension of a cross-section of the first limiting structure located between the adjacent sub-pixels cut by a plane is a first dimension, and the maximum dimension of a cross-section of the first part of the first limiting structure cut by the plane is a second dimension, the second dimension is not less than 1 / 2 of the first dimension, the plane is parallel to the arrangement direction of the adjacent sub-pixels, and the plane is perpendicular to the base substrate.

[0023] For example, in the display substrate provided according to at least one embodiment of the present disclosure, the length of the second opening in its extending direction is not equal to the length of the first limiting structure in its extending direction.

[0024] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the length of the second opening in its extending direction is equal to the length of the first limiting structure in its extending direction, and the first distance is not equal to the second distance.

[0025] For example, according to the display substrate provided by at least one embodiment of the present disclosure, the maximum dimension of a cross section of the second opening cut by the plane in the arrangement direction of the adjacent sub-pixels is no more than 10 micrometers.

[0026] For example, in the display substrate provided according to at least one embodiment of the present disclosure, the length of the second opening in the extension direction thereof is no greater than 50 micrometers.

[0027] For example, in the display substrate provided according to at least one embodiment of the present disclosure, the distance between the first defining structure and the first electrode of the sub-pixel is no more than 15 micrometers.

[0028] For example, in the display substrate provided according to at least one embodiment of the present disclosure, the length of the edge of the first defining structure close to the light-emitting area of ​​the sub-pixel is no more than 50 micrometers.

[0029] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the plurality of sub-pixels are arranged into a plurality of sub-pixel rows and a plurality of sub-pixel columns, and in a direction parallel to the base substrate, the distance between adjacent first defining structures between two adjacent sub-pixel rows is not greater than 40 microns, and the distance between adjacent first defining structures between two adjacent sub-pixel columns is not greater than 40 microns.

[0030] Another embodiment of the present disclosure provides a display panel including any of the above-mentioned display substrates.

[0031] Yet another embodiment of the present disclosure provides a display device, comprising any of the above-mentioned display substrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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, rather than limiting the present disclosure.

[0033] FIG1 is a schematic diagram of a partial planar structure of a display substrate provided in at least one embodiment of the present disclosure.

[0034] FIG2 is a schematic diagram of a partial cross-section structure taken along line AA′ shown in FIG1 .

[0035] FIG3 is a schematic diagram of a partial cross-section structure taken along line BB′ shown in FIG1 .

[0036] FIG. 4A is a partial schematic plan view of a plurality of first electrodes and a plurality of first defining structures in the display substrate shown in FIG. 1 .

[0037] FIG4B is a schematic diagram of another first limiting structure and a supporting structure provided by at least one embodiment of the present disclosure.

[0038] FIG5 is a schematic diagram of a partial planar structure of another display substrate provided by at least one embodiment of the present disclosure.

[0039] FIG6 is a schematic diagram of a partial cross-sectional structure taken along line CC′ shown in FIG1 .

[0040] FIG7 is a schematic diagram of a partial cross-sectional structure of another display substrate provided by at least one embodiment of the present disclosure.

[0041] FIG8 is a plan view of yet another display substrate provided by at least one embodiment of the present disclosure.

[0042] FIG. 9 is a partial cross-sectional schematic diagram taken along line W1 - W1 ′ shown in FIG. 8 .

[0043] FIG10 is a partial cross-sectional schematic diagram of yet another display substrate provided by at least one embodiment of the present disclosure.

[0044] FIG11 is a partial cross-sectional schematic diagram of yet another display substrate provided by at least one embodiment of the present disclosure.

[0045] FIG12 is a schematic diagram of a partial planar structure provided according to an example of an embodiment of the present disclosure.

[0046] FIG. 13 is a schematic diagram of a partial cross-sectional structure taken along line AA′ shown in FIG. 12 .

[0047] FIG14 is a partial enlarged view of the display substrate shown in FIG12.

[0048] FIG15 is a schematic diagram of a partial planar structure of a display substrate provided according to another example of an embodiment of the present disclosure.

[0049] FIG16 is a schematic diagram of a partial cross-sectional structure of a display substrate provided according to another example of an embodiment of the present disclosure.

[0050] 17 and 18 are schematic diagrams of partial cross-sectional structures of display substrates provided according to different examples of the embodiment of the present disclosure.

[0051] FIG19 is a schematic diagram of a partial planar structure of a display substrate provided according to another example of an embodiment of the present disclosure.

[0052] FIG20 is a schematic diagram of a partial cross-sectional structure taken along line CC′ shown in FIG19 .

[0053] FIG21 is a schematic diagram of a partial cross-sectional structure of a display substrate provided according to another example of an embodiment of the present disclosure.

[0054] FIG22 is a schematic diagram of a partial planar structure of a display substrate provided according to another example of an embodiment of the present disclosure.

[0055] FIG. 23 is a schematic diagram of a partial cross-sectional structure taken along line DD′ shown in FIG. 22 .

[0056] 24 and 25 are schematic diagrams of partial planar structures of display substrates provided according to different examples of the embodiment of the present disclosure.

[0057] FIG26 is a schematic diagram of a partial cross-sectional structure taken along line EE′ shown in FIG24 .

[0058] FIG. 27 is a schematic diagram of a partial cross-sectional structure taken along line FF′ shown in FIG. 25 .

[0059] FIG28 is a schematic diagram of a partial planar structure of a display substrate provided according to another example of an embodiment of the present disclosure.

[0060] FIG29 is a partially enlarged view of the display substrate shown in FIG28 .

[0061] FIG30 is a schematic diagram of a partial cross-sectional structure of a display substrate provided according to another embodiment of the present disclosure.

[0062] FIG31 is a schematic block diagram of a display device according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0063] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0064] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the ordinary meaning understood by a person of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are simply used to distinguish different components. The terms "include" or "comprises" and similar terms mean that the element or object preceding the term includes the elements or objects listed after the term and their equivalents, without excluding other elements or objects. The characteristics of "parallel," "perpendicular," and "same" used in the embodiments of this disclosure include the characteristics of "parallel," "perpendicular," and "same" in the strict sense, as well as "approximately parallel," "approximately perpendicular," and "approximately the same" that include certain errors, taking into account the errors associated with the measurement of specific quantities (for example, the limitations of the measurement system), and represent the acceptable deviation range for a specific value determined by a person of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within 10% or 5% of the stated value. When the number of a component is not specifically specified below in the embodiments of this 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.

[0065] Tandem technology stacks the sub-pixel's light-emitting layers in series, with a full charge generation layer (CGL) placed between the stacked layers. This layer, for example, consists of a P-type doped charge generation layer (P-CGL) and an N-type doped charge generation layer (N-CGL). Compared to a display substrate without a Tandem device, the two tandem layers are connected in series, creating a dual-emission device configuration. This significantly reduces the device's luminous current while maintaining the same luminous intensity, extending the lifespan of the organic light-emitting element and reducing power consumption.

[0066] During the study, the inventors of the present application found that: since the two light-emitting layers in the Tandem device are connected in series, higher requirements are placed on materials and evaporation; and the electrical conductivity of the charge generation layer in the Tandem device is relatively high, and the charge generation layer of two adjacent sub-pixels is a continuous film layer, there is a phenomenon of lateral charge migration, which easily causes crosstalk between adjacent sub-pixels, resulting in color deviation of the display substrate. In addition, when a support structure for supporting the mask is provided in the display substrate (usually located between adjacent sub-pixels), the morphology of the pixel defining portion has a greater impact on the support structure. For example, the pixel defining portion may include a pixel opening and a defining opening for forming an isolation structure, etc. The slope angle, thickness and other factors of the pixel defining portion at each opening will affect the morphology of the adjacent support structure, for example, it may cause the support structure to tilt or have uneven thickness, thereby destroying the support effect.

[0067] At least one embodiment of the present disclosure provides a display substrate, comprising: a base substrate, a plurality of sub-pixels, a pixel defining layer, at least one first defining structure, and at least one supporting structure, wherein the plurality of sub-pixels are located on the base substrate, each sub-pixel includes a light-emitting functional layer, and the light-emitting functional layer includes a plurality of film layers; the pixel defining layer includes a plurality of openings and a pixel defining portion surrounding the plurality of openings, the plurality of openings include a plurality of first openings and a plurality of second openings, the first openings are configured to define the light-emitting area of ​​the sub-pixels, at least a portion of at least one layer of the light-emitting functional layer located in the first openings is a continuous portion, and at least a portion located in the second openings is isolated; the first defining structure includes a first portion overlapping with the pixel defining portion and a second portion exposed by the second opening, the second portion of the first defining structure is configured to isolate at least one layer of the light-emitting functional layer; the minimum distance between the orthographic projection of the support structure on the base substrate and the orthographic projection of the first defining structure on the base substrate is a first distance, and the minimum distance between the orthographic projection of the support structure on the base substrate and the orthographic projection of the second opening on the base substrate is a second distance, and both the first distance and the second distance are greater than 0 micrometers and less than 10 micrometers.

[0068] In the display substrate provided by the present disclosure, on the one hand, the first part of the first limiting structure overlaps with the pixel limiting part, and the second part can isolate at least one film layer in the light-emitting functional layer, thereby ensuring the electrode flatness and good light output effect of the sub-pixel while reducing the risk of crosstalk between adjacent sub-pixels; on the other hand, by maintaining the first distance between the supporting structure and the first limiting structure, and the second distance between the supporting structure and the second opening within the above-mentioned range, the pixel limiting part and the supporting structure can both have good morphology, which is conducive to the supporting structure having a good mask support effect, and has a lower impact on the process and production capacity.

[0069] The display substrate, display panel, and display device provided by the embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0070] Figure 1 is a schematic diagram of the local planar structure of a display substrate provided in at least one embodiment of the present disclosure; Figure 2 is a schematic diagram of the local cross-sectional structure taken along the AA' line shown in Figure 1; Figure 3 is a schematic diagram of the local cross-sectional structure taken along the BB' line shown in Figure 1; Figure 4A is a schematic diagram of the local planar structure of multiple first electrodes and multiple first limiting structures in the display substrate shown in Figure 1.

[0071] As shown in Figure 1, the display substrate includes a base substrate 01, a plurality of sub-pixels 10, a pixel-defining layer 200, and at least one first defining structure 300 located on the base substrate 01. At least some of the sub-pixels 10 include a light-emitting functional layer 130, and the light-emitting functional layer 130 includes multiple film layers. For example, at least some of the sub-pixels 10 are located in an area of ​​the display substrate used for displaying images (e.g., the first area in the embodiments described below). The display substrate also includes a peripheral area surrounding the display area.

[0072] For example, as shown in FIG2 , the sub-pixel 10 further includes a first electrode 110 and a second electrode 120 located on both sides of a light-emitting functional layer 130 in a direction perpendicular to the substrate 01 (direction Z as shown in FIG2 ), with the first electrode 110 located between the light-emitting functional layer 130 and the substrate 01. For example, the light-emitting functional layer 130 may include a light-emitting layer for emitting light and a charge generation layer 133. The charge generation layer 133 has strong conductivity, which can enable the light-emitting functional layer 130 to have the advantages of long life, low power consumption, and high brightness. For example, the light-emitting functional layer 130 can 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 (EML) 131, a charge generation layer (CGL) 133, and a second light-emitting layer (EML) 132 arranged in a stacked manner, with the charge generation layer 133 located between the first light-emitting layer 131 and the second light-emitting layer 132. It should be noted that the light-emitting functional layer 130 shown in FIG2 may also include other film layers, such as a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL), etc., and the embodiments of the present disclosure are not limited to this. 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 of multiple sub-pixels 10 and can be referred to as common layers. In addition, the thickness of each film layer shown in FIG2 is only for the purpose of clearly illustrating each film layer and does not represent the actual size.

[0073] For example, as shown in FIG. 2 , the sub-pixel 10 may include a tandem light-emitting element, such as a Tandem OLED, but the embodiments of the present disclosure are not limited thereto.

[0074] For example, as shown in Figure 2, other structures 02 are also provided on the side of the first electrode 110 facing the base substrate 01, such as pixel circuits, signal lines and various insulating layers electrically connected to the first electrode 110 of the sub-pixel 10, for example, may include a passivation layer, a buffer layer, a gate insulating layer, an interlayer insulating layer, etc.

[0075] As shown in Figures 1 and 2, the pixel defining layer 200 includes a plurality of openings 201 and a pixel defining portion 230 surrounding the plurality of openings 201. The plurality of openings 201 in the pixel defining layer 200 include a plurality of first openings 210 and a plurality of second openings 220. The first openings 210 are configured to define the light-emitting area 010 of the sub-pixel 10. At least a portion of at least one layer of the light-emitting functional layer 130 located in the first openings 210 is continuous, and at least a portion located in the second openings 220 is interrupted.

[0076] For example, as shown in Figures 1 and 2, the first opening 210 can be a pixel opening to define a light-emitting region 010 of the sub-pixel 10. 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 010 can refer to the region of the sub-pixel 10 that effectively emits light. The shape of the light-emitting region 010 refers to a two-dimensional shape. For example, the shape of the light-emitting region 010 can be the same as the shape of the orthographic projection of the portion of the first electrode 110 exposed by the first opening 210 on the base substrate 01.

[0077] For example, as shown in Figures 1 and 2, the second opening 220 of the pixel defining layer 200 is located between adjacent sub-pixels 10. For example, the orthographic projection area of ​​the second opening 220 on the base substrate 01 is smaller than the orthographic projection area of ​​the first opening 210 on the base substrate 01.

[0078] As shown in Figures 1 and 2, the first limiting structure 300 is located between adjacent sub-pixels 10 and includes a first portion 310 overlapping with the pixel defining portion 230 and a second portion 320 exposed by the second opening 220. The second portion 320 of the first limiting structure 300 is configured to isolate at least one layer of the light-emitting functional layer 130.

[0079] For example, as shown in Figures 1 and 2, the first confinement structure 300 is located between the pixel-defining portion 230 and the substrate 01, and between two adjacent sub-pixels 10 of different colors. For example, at least a portion of the surface of the first confinement structure 300 that is distal to the substrate 01 is further distal to the substrate 01 than the surface of the first electrode 110 that is distal to the substrate 01. For example, the first portion 310 of the first confinement structure 300 is covered by the pixel-defining portion 230, the orthographic projection of the first portion 310 on the substrate 01 completely falls within the orthographic projection of the pixel-defining portion 230 on the substrate 01, and the orthographic projection area of ​​the first portion 310 on the substrate 01 is smaller than the orthographic projection area of ​​the pixel-defining portion 230 on the substrate 01. The second portion 320 is located within the second opening 220, and at least one layer of the light-emitting functional layer 130 is interrupted at the edge of the second portion 320 that is distal to the first portion 310. For example, the charge generation layer 133 of the light-emitting functional layer 130 is interrupted. For example, all layers of the light-emitting functional layer 130 are interrupted. For example, the separated portion of the light-emitting functional layer 130 is located on the sidewall of the second portion 320 away from the first portion 310 .

[0080] As shown in Figures 1 and 3, the minimum distance between the orthographic projection of the support structure 400 on the substrate substrate 01 and the orthographic projection of the first limiting structure 300 on the substrate substrate 01 is a first distance L1, and the minimum distance between the orthographic projection of the support structure 400 on the substrate substrate 01 and the orthographic projection of the second opening 220 on the substrate substrate 01 is a second distance L2. Both the first distance L1 and the second distance L2 are greater than 0 microns and less than 10 microns.

[0081] For example, as shown in Figures 1 and 3, the support structure 400 can be located between two adjacent first openings 210 and between two adjacent second openings 220. For example, multiple second openings 210 can surround the support structure 400. By setting the first distance L1 to be greater than 0 microns and less than 10 microns, a portion of the pixel-defining portion 230 can be located between the support structure 400 and the first defining structure 300, and the thickness of this portion of the pixel-defining portion 230 can be maintained uniformly. For example, by setting the second distance L2 to be greater than 0 microns and less than 10 microns, the impact of the second openings 220 on the topography of the pixel-defining portion 230 can be reduced. For example, the thickness of the pixel-defining portion 230 can be made uniform, and the surface of the pixel-defining portion 230 that overlaps with the support structure 400 and is away from the base substrate 01 has good flatness. This facilitates the stable placement of the support structure 400 and reduces the risk of tilting or positional displacement of the support structure 400.

[0082] In the display substrate provided by the present disclosure, on the one hand, the first part of the first limiting structure overlaps with the pixel limiting part, and the second part can isolate at least one film layer in the light-emitting functional layer, thereby ensuring the electrode flatness and good light output effect of the sub-pixel while reducing the risk of crosstalk between adjacent sub-pixels; on the other hand, by maintaining the first distance between the supporting structure and the first limiting structure, and the second distance between the supporting structure and the second opening within the above-mentioned range, the pixel limiting part and the supporting structure can both have good morphology, which is conducive to the supporting structure having a good mask support effect, and has a lower impact on the process and production capacity.

[0083] For example, as shown in Figures 1 and 3, both the first distance L1 and the second distance L2 are no less than 2 microns. The first distance L1 and the second distance L2 can also be no less than 3 microns, 4 microns, 5 microns, 7 microns, or 9 microns, or can be any other value between 2 microns and 10 microns, which are not listed here. This arrangement can effectively reduce the impact of the second opening 220 and the first limiting structure 300 on the morphology of the pixel defining portion 230, facilitate the stable arrangement of the support structure 400, and reduce the risk of the support structure 400 tilting or position shifting.

[0084] For example, as shown in Figures 1 and 3, the straight-line distance between any two points on the edge of a cross section of the support structure 400, taken by a plane parallel to the substrate 01, is no greater than 20 microns. For example, the straight-line distance is the length of a straight line segment between two points on the edge of the cross section of the support structure 400. For example, the support structure 400 may be cylindrical, and the shapes of the cross sections of the support structure 400 taken by multiple planes parallel to the substrate 01 may be different. For example, as shown in Figure 1, the cross section of the support structure 400 taken by a plane parallel to the substrate 01 is circular, so the maximum straight-line distance between any two points on the edge of the cross section of the support structure 400 is the diameter of the circle. For example, when the cross section of the support structure 400 taken by a plane parallel to the substrate 01 is elliptical, the maximum straight-line distance between any two points on the edge of the cross section of the support structure 400 is equal to the major axis of the ellipse. The embodiments of the present disclosure do not limit the shape of the cross section of the support structure 400; for example, it may be polygonal or other shapes.

[0085] For example, as shown in Figures 1 and 3, in order to make the support structure 400 have a stronger supporting force on the mask, the straight-line distance between any two points on the edge of the above-mentioned cross-section of the support structure 400 can be made as large as possible, for example, it can be 10 to 20 microns, 15 to 18 microns or 18 to 19 microns, and the embodiments of the present disclosure are not limited to this.

[0086] For example, as shown in FIG3 , the size of the support structure 400 is no larger than 10 microns in the direction Z. For example, in order to ensure that the support structure 400 has a stronger support force on the mask, the size of the support structure 400 in the direction Z can be as large as possible, for example, 5 to 10 microns, 6 to 8 microns, or 8 to 10 microns, which is not limited in the embodiments of the present disclosure.

[0087] For example, as shown in FIG3 , the support structure 400 may be made of positive photoresist. For example, positive photoresist refers to a photoresist in which the portion exposed to light undergoes degradation reaction and can be dissolved by a developer, and the pattern of the remaining non-exposed portion is consistent with the pattern of the mask.

[0088] For example, as shown in FIG1 , a plurality of sub-pixels 10 in a display substrate include a plurality of first sub-pixels 101, a plurality of second sub-pixels 102, and a plurality of third sub-pixels 103. The plurality of sub-pixels 10 are arranged into a plurality of first sub-pixel groups 0010 and a plurality of second sub-pixel groups 0020, which are alternately arranged along a first arrangement direction X. The first sub-pixel groups 0010 include first sub-pixels 101 and second sub-pixels 102, which are alternately arranged along a second arrangement direction Y. The second sub-pixel groups 0020 include third sub-pixels 103, which are arranged along the second arrangement direction Y. For example, the first sub-pixels 101, the second sub-pixels 102, and the third sub-pixels 103 each emit different colors. For example, the first sub-pixel 101 may be a red sub-pixel emitting red light, the second sub-pixel 102 may be a blue sub-pixel emitting blue light, and the third sub-pixel 103 may be a green sub-pixel emitting green light. However, the embodiments of the present disclosure are not limited thereto, and the emission colors of the first sub-pixels 101, the second sub-pixels 102, and the third sub-pixels 103 may be interchangeable.

[0089] For example, as shown in FIG1 , the first sub-pixel group 0010 and the second sub-pixel group 0020 are staggered in the second arrangement direction Y, and each first sub-pixel 101 in at least a portion of the first sub-pixels 101 is surrounded by eight sub-pixels 10, each of which includes alternating third sub-pixels 103 and second sub-pixels 102. The first arrangement direction X intersects the second arrangement direction Y, and both the first arrangement direction X and the second arrangement direction Y are perpendicular to the substrate.

[0090] For example, as shown in FIG1 , the areas of the light-emitting regions 010 of the first sub-pixel 101 and the light-emitting regions 010 of the third sub-pixel 103 are both smaller than the light-emitting region 010 of the second sub-pixel 102, and the light-emitting region 010 of the third sub-pixel 103 is smaller than the light-emitting region 010 of the first sub-pixel 101. For example, a second opening 220 and a first confining structure 300 are provided between the second sub-pixel 102 and the third sub-pixel 103 (e.g., the second opening 220 and the first confining structure 300 enclosed by the dashed box P in FIG1 ). The third sub-pixel 103 is further away from the second opening 220 located between the second sub-pixel 102 and the third sub-pixel 103 than the adjacent second sub-pixel 102. For example, the distance between the second opening 220 located between the second sub-pixel 102 and the third sub-pixel 103 and the light-emitting region of the third sub-pixel 103 is not less than the distance between the second opening 220 and the light-emitting region of the second sub-pixel 102. For example, the distance between the first opening 210 corresponding to the third sub-pixel 103 and the second opening 220 located between the third sub-pixel 103 and the second sub-pixel 102 is U1, and the distance between the first opening 210 corresponding to the second sub-pixel 102 and the second opening 220 located between the third sub-pixel 103 and the second sub-pixel 102 is U2, then U1 is not less than U2.

[0091] For example, as shown in FIG1 , taking the second opening 220 in the dashed box P as an example, the second opening 220 is in the shape of an elongated strip. In its length direction, the length of the second opening 220 is substantially the same as the edge size of the first electrode 110 (see FIG1 ) of the third sub-pixel 103, and is larger than the size of the light-emitting area 010 of the third sub-pixel 103. Therefore, the placement of the second opening 220 near the first opening 210 corresponding to the third sub-pixel 103 may significantly affect the morphology of the pixel-defining portion 230. For example, the thickness of the pixel-defining portion 230 between the first opening 210 corresponding to the second sub-pixel 102 and the adjacent second opening 220 may be reduced, resulting in the inability of the pixel-defining portion 230 in this portion to form a good slope angle at the first opening 210 as designed, thereby affecting the light extraction effect of the third sub-pixel 103.

[0092] Therefore, by making the above-mentioned U1 not smaller than U2, there can be sufficient space between the first opening corresponding to the third sub-pixel and the second opening located between the third sub-pixel and the second sub-pixel, so as to facilitate the setting of the pixel defining portion, so that the pixel defining portion of the light-emitting area surrounding the third sub-pixel has a good morphology, for example, it can maintain a sufficient thickness and form a good slope angle, so as to facilitate improving the light-emitting effect of the third sub-pixel.

[0093] For example, as shown in Figure 1, the area of ​​the light-emitting area of ​​the first sub-pixel 101 is larger than the area of ​​the light-emitting area of ​​the third sub-pixel 103, and the distance between the second opening 220 located between the first sub-pixel 101 and the third sub-pixel 103 and the light-emitting area of ​​the first sub-pixel 101 is not greater than the distance between the second opening 220 and the light-emitting area of ​​the third sub-pixel 103, which is conducive to making the part of the pixel defining portion 230 located between the first opening 210 corresponding to the third sub-pixel 103 and the second opening 220 located between the third sub-pixel 103 and the first sub-pixel 101 have a good morphology, for example, it can maintain sufficient thickness and form a good slope angle, so as to improve the light-emitting effect of the third sub-pixel 103.

[0094] For example, as shown in Figure 2, the portion of the light-emitting functional layer 130 located on the second portion 320 of the first limiting structure 300 includes a flat portion, so that the light-emitting functional layer 130 can make a smooth transition on the second portion 320, thereby reducing the impact on the flatness of the portion of the light-emitting functional layer 130 located in the first opening 210, thereby ensuring a good light-emitting effect.

[0095] For example, as shown in FIG2 , in the direction facing the third sub-pixel 103 and the second sub-pixel 102, the maximum width M1 of the first portion 310 of the first confining structure 300 is no greater than 5 microns, such as 3 to 5 microns. For example, the maximum width M1 of the first portion 310 can be greater than the maximum width M2 of the second portion 320, thereby facilitating a sufficiently large coverage area and, in turn, forming a favorable light output angle. For example, the maximum width M2 of the second portion 320 can be 1 to 10 microns, such as 5 to 8 microns, but is not limited thereto. For example, M1 ≥ M2, thereby facilitating ensuring the PDL's coverage of the first portion 310 of the first confining structure 300.

[0096] Such a setting is beneficial to ensuring that the portion of the light-emitting functional layer located on the second portion has good flatness, and reducing the influence of the isolated portion of the light-emitting functional layer on the morphology of the portion of the light-emitting functional layer located in the first opening (and at the edge of the first opening).

[0097] For example, as shown in Figures 1-2 and 4A, in the arrangement direction (e.g., direction Q shown in Figure 2) of adjacent sub-pixels 10 (e.g., the third sub-pixel 103 and the second sub-pixel 102 shown in Figure 2), the maximum dimension of a cross-section of the first limiting structure 300 located between the adjacent sub-pixels 10 as cut by a plane is a first dimension M1+M2, and the maximum dimension of a cross-section of the first portion 310 of the first limiting structure 300 as cut by the plane is a second dimension M1, and the second dimension M1 is not less than 1 / 2 of the first dimension M1+M2. The above plane is parallel to the arrangement direction (e.g., direction Q) of the adjacent sub-pixels 10 and is perpendicular to the substrate 01. For example, in an embodiment of the present disclosure, the arrangement direction of the adjacent sub-pixels 10 is parallel to the substrate 01.

[0098] For example, as shown in Figures 1-2 and 4A, the orthographic projection of the first confining structure 300 on the base substrate 01 is approximately a first strip 3101, and the orthographic projection of the first portion 310 of the first confining structure 300 on the base substrate 01 is approximately a second strip 3102. For example, the second strip 3102 is a portion of the first strip 3101. For example, the maximum width of the second strip 3102 is no greater than 1 / 2 of the maximum width of the first strip 3101. For example, as shown in Figure 2, the maximum width of the second strip 3102 is M1, and the maximum width of the first strip 3101 is M1 + M2. This configuration facilitates ensuring that the second portion 320 of the first confining structure 300 has a sufficient exposed area, thereby achieving good isolation capabilities.

[0099] For example, as shown in FIG2 , the minimum distance M3 between the first defining structure 300 and the light-emitting area 010 of the sub-pixel 10 (e.g., the third sub-pixel 103) is no greater than 15 micrometers, so as to facilitate maintaining a good slope angle μ of the pixel defining portion 230 at the first opening 210, thereby achieving a good light extraction effect for the sub-pixel 10. For example, the slope angle μ of the pixel defining portion 230 at the first opening 210 can be 20 degrees to 80 degrees, and the embodiments of the present disclosure are not limited thereto.

[0100] For example, as shown in FIG1 , the length of the second opening 220 in its extension direction is not equal to the length of the first confining structure 300 in its extension direction. For example, the second opening 220 may extend along the edge of the light-emitting area 010 of an adjacent sub-pixel 10, and the first confining structure 300 may extend along the edge of the light-emitting area 010 of an adjacent sub-pixel 10. For example, the orthographic projection of the second opening 220 on the substrate 01 is approximately a third stripe 3103, and the length of the first stripe 3101 is not equal to the length of the third stripe 3103. For example, the length of the first stripe 3101 is less than the length of the third stripe 3103. For example, both ends of the third stripe 3103 along its length direction protrude relative to the first stripe 3101. This helps ensure that the length of the portion of the first stripe 3101 that overlaps with the third stripe 3103 is equal to the length of the third stripe 3103, thereby ensuring that the second portion 320 of the first confining structure 300, which serves to provide partitioning, has uniform dimensions. For example, the length of the first bar 3101 is greater than the length of the third bar 3103, which is conducive to making the length of the part of the first bar 3102 overlapping with the third bar 3103 equal to the length of the third bar 3103, and is conducive to making the second part 320 of the first limiting structure 300 used for partitioning have uniform size.

[0101] FIG4B is a schematic diagram of another first limiting structure and a supporting structure provided by at least one embodiment of the present disclosure.

[0102] In some embodiments of the present disclosure, referring to FIG. 4B , the length of the second opening 220 along its extension direction may be equal to the length of the first confining structure 300 along its extension direction. For example, the length of the first strip 3101 is equal to the length of the third strip 3103, and the first distance L1 is different from the second distance L2. The orthographic projection of the first portion 310 of the first confining structure 300 on the substrate is L-shaped, the orthographic projection of the second portion 320 of the first confining structure 300 on the substrate is the shaded area of ​​the strip, and the orthographic projection of the second opening 220 on the substrate is the third strip 3103. Along the length direction of the third strip 3103, the first confining structure 300 and the second opening 220 are staggered, with the end of the first portion 310 of the first confining structure 300 away from the support structure 400 located on the side of the second opening 220 away from the support structure 400. Such a configuration is beneficial for controlling the length direction of the second portion 320 of the first limiting structure 300 used for partitioning, so that the length of the second portion 320 is maintained within the design range to have good dimensional uniformity.

[0103] For example, as shown in FIG1 , the length of the edge of the first confining structure 300 near the light-emitting region 010 of the sub-pixel 10 is no longer than 50 microns. For example, the orthographic projection of the first confining structure 300 on the substrate is the aforementioned first strip 3101. The length of the first strip 3101 is no longer than 50 microns, and can be, for example, 20 to 30 microns, 30 to 40 microns, 35 to 50 microns, or other values ​​no longer than 50 microns, which are not listed here. This ensures that the second portion 320 of the first confining structure 300 has sufficient blocking capability while minimizing the impact on the morphology of the pixel defining portion 230.

[0104] For example, as shown in FIG1 and FIG2 , in the arrangement direction of adjacent sub-pixels 10 (e.g., the third sub-pixel 103 and the second sub-pixel 102 shown in FIG2 ) (e.g., direction Q shown in FIG2 ), the maximum dimension of a cross-section of the second opening 220 cut by a plane in direction Q is no greater than 10 microns. For example, the maximum width of the third strip 3103 is no greater than 10 microns, and may be, for example, 5 to 8 microns, 6 to 9 microns, or 7 to 10 microns. The maximum width of the third strip 3103 is greater than the maximum width M2 of the second portion 320 (see FIG2 ), thereby exposing the second portion 320 of the first limiting structure 300, thereby ensuring that the second portion 320 has good barrier properties.

[0105] For example, as shown in FIG1 , the length of the second opening 220 in its extension direction is no greater than 50 microns. For example, the length of the third strip 3103 is no greater than 50 microns, and can be, for example, 20 to 30 microns, 30 to 40 microns, 35 to 50 microns, or other values ​​no greater than 50 microns, which are not listed here. This ensures that the second portion 320 of the first defining structure 300 has sufficient isolation capability while minimizing the impact on the morphology of the pixel defining portion 230.

[0106] For example, as shown in Figure 2, the distance between the first limiting structure 300 and the first electrode 110 of the sub-pixel 10 (for example, the third sub-pixel 103) is no more than 15 microns, for example, it can be 5 to 10 microns, 7 to 12 microns, 8 to 13 microns or other values ​​no more than 15 microns, which are not listed here one by one. Such a setting is beneficial for making the pixel limiting portion 230 have a good slope angle μ at the first opening 210, while shortening the extension path of the light-emitting functional layer 130 from the first opening 210 to the second opening 220, which is beneficial for simplifying the manufacturing process.

[0107] For example, as shown in FIG1 , a plurality of sub-pixels 10 are arranged into a plurality of sub-pixel rows R1 and a plurality of sub-pixel columns R2. For example, the arrangement direction of the plurality of sub-pixel rows R1 is a direction rotated 45 degrees clockwise along the second arrangement direction Y, and the arrangement direction of the plurality of sub-pixel columns R2 is a direction rotated 45 degrees clockwise along the first arrangement direction X. For example, a plurality of first confining structures 300 are disposed between two adjacent sub-pixel rows R1, and the distance between adjacent first confining structures 300 is no greater than 40 microns, and may be, for example, 5-10 microns, 15-25 microns, 30-40 microns, or other values ​​no greater than 40 microns, which are not listed here. For example, a plurality of first confining structures 300 are disposed between two adjacent sub-pixel columns R2, and the distance between adjacent first confining structures 300 is no greater than 40 microns, and may be, for example, 5-10 microns, 15-25 microns, 30-40 microns, or other values ​​no greater than 40 microns, which are not listed here. Such a configuration is conducive to maintaining a good spacing between adjacent first limiting structures 300, so that the multiple second openings 220 in the pixel limiting portion 230 are spaced from each other and evenly distributed, which is conducive to maintaining a good morphology of each part of the pixel limiting portion 230. For example, the thickness of the pixel limiting portion 230 can be uniform and each first opening 210 and second opening 220 can have a good slope angle.

[0108] FIG5 is a schematic diagram of a partial planar structure of another display substrate provided by at least one embodiment of the present disclosure; FIG6 is a schematic diagram of a partial cross-sectional structure taken along line CC′ shown in FIG1 .

[0109] For example, the display substrate shown in FIG5 is arranged differently from the multiple sub-pixels in the display substrate shown in FIG1 . As shown in FIG5 , the multiple sub-pixels 10 include multiple first sub-pixels 101, multiple second sub-pixels 102, and multiple third sub-pixels 103, and the first sub-pixels 101, the second sub-pixels 102, and the third sub-pixels 103 constitute a repeating unit. For clarity of illustration, only one repeating unit is shown in FIG5 , and the embodiments of the present disclosure do not limit the number of repeating units. The structures such as the base substrate, the pixel defining portion, and the light-emitting element in the display substrate shown in FIG5 may have the same features as the structures such as the base substrate, the pixel defining portion, and the light-emitting element in the display substrate shown in FIG1 , and will not be repeated here.

[0110] For example, as shown in FIG5 , the first sub-pixel 101 and the second sub-pixel 102 in each repeating unit are arranged sequentially in a first arrangement direction X. The first sub-pixel 101 and the second sub-pixel 102 are located on one side of the third sub-pixel 103 in a second arrangement direction Y, and the first arrangement direction X intersects the second arrangement direction Y. For example, one of the first sub-pixel 101 and the second sub-pixel 102 can be a red sub-pixel emitting red light, the other can be a green sub-pixel emitting green light, and the third sub-pixel 103 can be a blue sub-pixel emitting blue light. For example, the emission colors of the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103 can be interchangeable. For example, the area of ​​the emission area of ​​the first sub-pixel 101 can be smaller than that of the second sub-pixel 102, and the area of ​​the emission area of ​​the second sub-pixel 102 can be smaller than that of the third sub-pixel 103. Of course, the embodiments of the present disclosure are not limited to this, and the area of ​​the emission area of ​​each sub-pixel can be set according to product requirements.

[0111] For example, as shown in FIG5 , a first defining structure 300 and a second opening 220 are disposed between any two adjacent sub-pixels 10 among the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103. For example, a first defining structure 300 and a second opening 220 are disposed on two opposing sides of any one of the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103.

[0112] For example, as shown in Figures 5 and 6, the distances between the light-emitting areas 010 of adjacent sub-pixels 10 and the second opening 220 located between the adjacent sub-pixels 10 (for example, the first sub-pixel 101 and the second sub-pixel 102) are not equal. For example, the distances between the second opening 220 and the light-emitting areas 010 of the two adjacent sub-pixels 10 located on both sides thereof are not equal. For example, the orthographic projection of the light-emitting area 010 of each sub-pixel 10 on the substrate can be a quadrilateral, but is not limited thereto. For example, each sub-pixel 10 is provided with a second opening 220 that is closer to the light-emitting area 010 of the sub-pixel 10 on both sides of the sub-pixel 10, and the second opening 220 may not be provided on the other two sides of the sub-pixel 10 that are opposite to each other.

[0113] For example, as shown in Figures 5 and 6 , the second portion 320 of the first confining structure 300 is located between the first portion 310 of the first confining structure 300 and the light-emitting region 010 of the adjacent sub-pixel 10 that is adjacent to the second opening 220. For example, as shown in Figure 5 , the sub-pixel 10 that is adjacent to the second opening 220 between the adjacent first sub-pixel 101 and second sub-pixel 102 is the second sub-pixel 102, and the second portion 320 of the first confining structure 300 is located between the first portion 310 of the first confining structure 300 and the light-emitting region 010 of the second sub-pixel 102.

[0114] For example, as shown in Figures 5 and 6 , in the first arrangement direction X, second openings 220 are provided on both sides of the second sub-pixel 102 that are opposite to each other in the first arrangement direction X. Of the two second openings 220, the second opening 220 located between the first sub-pixel 101 and the second sub-pixel 102 is closer to the light-emitting area 010 of the second sub-pixel 102 and farther from the light-emitting area 010 of the first sub-pixel 101. By providing second openings 220 that are closer to the light-emitting area 010 of each sub-pixel 10 on both sides of the sub-pixel 10 that are opposite to each other, the second openings 220 can be made symmetrical, which helps ensure that the pixel defining portion 230 has a good slope angle at the first opening 210. This also shortens the extension path of the light-emitting functional layer 130 from the first opening 210 to the second opening 220, thereby enhancing the partition effect and simplifying the manufacturing process.

[0115] For example, as shown in Figures 5 and 6, the second portion 320 of the first confining structure 300 is located between the first portion 310 thereof, the second opening 220, and the light-emitting area 010 of the adjacent sub-pixel 10. The sub-pixel 10 adjacent to the second opening 220 is the sub-pixel 10 closest to the second opening 220. For example, whether a sub-pixel 10 is adjacent can be determined based on the distance between the second opening 220 and the first electrodes 110 of the plurality of sub-pixels 10. For example, for one of the second openings 220 disposed on opposite sides of any sub-pixel 10, such as the second opening 220 adjacent to the light-emitting area 010 of the second sub-pixel 10 and located between the first sub-pixel 101 and the second sub-pixel 102, the second portion 320 of the first confining structure 300, which overlaps with the second opening 220, is located between the first portion 310 of the first confining structure 300 and the second sub-pixel 102. In other words, the second portion 320 of the first confining structure 300, which is used for partitioning, is closer to the second sub-pixel 102 than the first portion 310 of the first confining structure 300. Such a configuration is beneficial for the second portion 320 of the first limiting structure 300 to isolate at least one layer of the light-emitting functional layer 130 while reducing the impact on the morphology of the pixel limiting portion 230. For example, the portion of the pixel limiting portion 230 located between the second opening 220 and the first sub-pixel 101 can have a good morphology, reducing the impact on the light output angle of the first sub-pixel 101.

[0116] For example, as shown in Figure 5, the length of the edge of the first opening 210 of the first confinement structure 300 near the sub-pixel 10 is less than the length of the edge of the second opening 220 near the first opening 210 of the sub-pixel 10, and the ends of the second opening 220 in its extension direction protrude beyond the ends of the first confinement structure 300 that overlap with it. For example, the orthographic projection of the first confinement structure 300 on the substrate is a first stripe, and the length of the edge of the first confinement structure 300 near the first opening 210 of the sub-pixel 10 is the length of the first stripe. For example, the orthographic projection of the second opening 220 on the substrate is a third stripe, and the edge of the second opening 220 near the first opening 210 of the sub-pixel 10 is the length of the third stripe. The first and third stripes overlap, and along the length direction of the third stripe, both ends of the third stripe protrude beyond the first stripe. This configuration facilitates uniformity in the dimensions (e.g., length) of the second portion 320 of the first confinement structure 300, which facilitates controlling the blocking capability of the first confinement structure 300.

[0117] FIG7 is a schematic diagram of a partial cross-sectional structure of another display substrate provided by at least one embodiment of the present disclosure.

[0118] For example, the first defining structure 300 of the display substrate shown in FIG7 is different from the structure of the pixel defining portion 230 , and the remaining structures can refer to the relevant description of FIG2 in the above embodiment.

[0119] For example, as shown in FIG7 , the display substrate includes a base substrate 01, a plurality of sub-pixels 10 located on the base substrate 01, and a pixel defining layer 200. Each of at least some of the sub-pixels 10 includes a light-emitting functional layer 130, which includes multiple film layers. The sub-pixel 10 also includes a first electrode 110 and a second electrode 120 located on both sides of the light-emitting functional layer 130 in a direction perpendicular to the base substrate 01, with the first electrode 110 located between the light-emitting functional layer 130 and the base substrate 01. The light-emitting functional layer 130 may include a light-emitting layer for emitting light and a charge generation layer 133. The pixel defining layer 200 includes a plurality of first openings 210 and a plurality of second openings 220. The plurality of first openings 210 are configured to define the light-emitting regions 010 of at least some of the sub-pixels 10. At least a portion of at least one layer of the light-emitting functional layer 130 located in the first openings 210 is continuous, and at least a portion located in at least one second opening 220 is interrupted. 2 , the portion of the film layer in the light-emitting functional layer 130 located in the first opening 210 is a continuous portion, and the portion located in the second opening 220 is isolated.

[0120] For example, as shown in FIG7 , the first confining structure 300 is located between adjacent sub-pixels 10 and includes a first portion 310 overlapping the pixel defining portion 230 and a second portion 320 exposed by the second opening 220. The second portion 320 of the first confining structure 300 is configured to block at least one layer of the light-emitting functional layer 130. For example, in a direction perpendicular to the base substrate 01 (i.e., in direction Z), the average size of the first portion 310 of the first confining structure 300 is smaller than the average size of the second portion 320. The first portion 310 of the first confining structure 300 covers the pixel defining portion 230, and a slope angle β is formed between at least a portion of a side surface 311 of the first portion 310 of the first confining structure 300 away from the second portion 320 and a first surface 312 of the first portion 310 near the base substrate 01. The angle between at least a portion of the side surface 311 and a portion of the first surface 312 near the second portion 320 is less than 90 degrees, and may be, for example, 50 to 70 degrees, 60 to 80 degrees, 70 to 85 degrees, or other angles less than 90 degrees (not listed here), such that the slope angle β is a "positive slope angle." For example, the side surface 311 of the first portion 310 is inclined toward the second portion 320, such that the slope angle β is the aforementioned "positive slope angle."

[0121] Such a setting, on the one hand, is conducive to enhancing the adhesion ability between the first part of the first limiting structure and the pixel limiting part, and is conducive to making the thickness of the first part not too small and having good thickness uniformity; on the other hand, it is conducive to making the second part located in the second opening have a good morphology, so that the side of the second part away from the first part (that is, the side 322 shown in Figure 7) has an orthographic projection on the substrate that falls within the orthographic projection of the surface of the second part away from the substrate on the substrate, that is, the inclination direction of the side of the second part away from the first part is the same as the inclination direction of the side of the first part away from the second part, so that the edge (for example, the corner) of the second part has good isolation ability.

[0122] For example, as shown in Figure 7, in the arrangement direction (for example, direction Q shown in Figure 7) of adjacent sub-pixels 10 (for example, the first sub-pixel 101 and the second sub-pixel 102 shown in Figure 7), the maximum dimension of the cross-section of the first limiting structure 300 located between the adjacent sub-pixels 10 cut by a plane is the first dimension N1+N2, and the maximum dimension of the cross-section of the first portion 310 of the first limiting structure 300 cut by the plane is the second dimension N1, the second dimension N1 is not less than 1 / 2 of the first dimension N1+N2, and is not greater than 10 microns, the above-mentioned plane is parallel to the arrangement direction (for example, direction Q) of the adjacent sub-pixels 10, and the plane is perpendicular to the substrate 01.

[0123] For example, as shown in FIG7 , the orthographic projection of the first confining structure 300 on the base substrate 01 is substantially a first stripe, and the orthographic projection of the first portion 310 of the first confining structure 300 on the base substrate 01 is substantially a second stripe. The maximum width of the first stripe is N1+N2, and the maximum width of the second stripe is N1. N1 is not less than 1 / 2 of N1+N2 and not greater than 10 microns. For example, N1 is not less than N2.

[0124] Such a configuration is beneficial to enhancing the adhesion between the first portion of the first defining structure and the pixel defining portion, and is beneficial for the first portion to have good thickness uniformity, and is beneficial for the second portion to have a strong isolation capability for the light-emitting functional layer.

[0125] FIG8 is a plan view of another display substrate provided by at least one embodiment of the present disclosure; FIG9 is a partial cross-sectional schematic diagram taken along line W1 - W1 ′ shown in FIG8 .

[0126] For example, as shown in Figure 8, the display substrate includes a first area A1, a second area A2 and a third area A3. The first area A1 is configured to display, and at least part of the sub-pixels 10 are located in the first area A1. For example, at least part of the second area A2 is configured to transmit light, for example, a photosensor, a fingerprint sensor or other devices can be provided in the second area A2. The first area A1 is located on at least one side of the second area A2. In some embodiments, the first area A1 surrounds the second area A2, that is, the second area A2 can be surrounded by the first area A1. For example, the second area A2 can also be provided at other positions, depending on the needs. For example, the second area A2 can be located in the middle of the top of the base substrate. The third area A3 is located between the first area A1 and the second area A2. For example, the third area A3 can serve as a transition zone. For example, the structures of the base substrate described in the above embodiments (for example, the first limiting structure) are all located in the first area A1.

[0127] For example, as shown in Figures 8 and 9, the display substrate includes at least one second confining structure 500 located in the third area A3. The orthographic projection of the second confining structure 500 on the base substrate 01 is annular and surrounds the second area A2. The second confining structure 500 is configured to block at least one layer of the light-emitting functional layer 130. For example, the second confining structure 500 (and the third confining structure 600 in subsequent embodiments) can increase the resistance of the second electrode, reduce the impact of electrochemical corrosion on the second area A2, and reduce the risk of black spots and other defects in the product due to corrosion by water, oxygen, etc. For example, the orthographic projection of the second confining structure 500 on the base substrate 01 is a closed ring, or a non-closed ring. For example, the number of second confining structures 500 can be multiple, for example, 1 to 5, for example, at least one of 2 to 4, 3 to 5, and 1 to 2, and the embodiments of the present disclosure are not limited to this.

[0128] For example, as shown in Figures 8 and 9, the material of the second confinement structure 500 is the same as that of the first confinement structure 300. For example, both the first confinement structure 300 and the second confinement structure 500 can be made of a negative photoresist. Negative photoresist is a photoresist in which the illuminated portion undergoes a crosslinking reaction, becoming insoluble, while the unexposed portion is dissolved by a developer, resulting in a pattern complementary to the pattern on the mask. At least one layer of the light-emitting functional layer 130 is interrupted by an edge portion of the second confinement structure 500 that does not overlap with the pixel-defining portion 230. For example, in the third area A3, no pixel-defining portion 230 is provided. At least a portion of the light-emitting functional layer 130 is provided on a side of the second confinement structure 500 away from the base substrate 01 and is interrupted by the second confinement structure 500. For example, the edges of the second confinement structure 500 near the first area A1 and the edges near the second area A2 are configured to interrupt at least one layer of the light-emitting functional layer 130, thereby further reducing the risk of crosstalk.

[0129] FIG10 is a partial cross-sectional schematic diagram of another display substrate provided by at least one embodiment of the present disclosure.

[0130] For example, the difference between the display substrate shown in FIG10 and the display substrate shown in FIG9 is that a pixel defining portion 230 is further provided in the third area A3, and the rest of the structures are the same. For details, please refer to the relevant description of the above embodiment, which will not be repeated here.

[0131] For example, as shown in FIG10 , the plurality of openings 201 in the pixel-defining layer 200 include a third opening 2300 located in the third area A3 and configured to expose at least a portion of the second defining structure 500. For example, the display substrate includes at least one second defining structure 500, and at least one second defining structure 500 includes a first sub-defining structure 510. The first sub-defining structure 510 is fully exposed by the third opening 2300. Consequently, the edges of the first sub-defining structure 510 near the first area A1 and the edges near the second area A2 can both block at least one layer of the light-emitting functional layer 130, thereby reducing the risk of crosstalk. Furthermore, since a portion of the pixel-defining portion 230 is located in the third area A3, a transition can be achieved between the portion of the pixel-defining portion 230 located in the first area A1 and the portion located in the third area A3, which helps ensure the flatness of the sub-pixel electrode and achieves good light extraction.

[0132] FIG11 is a partial cross-sectional schematic diagram of yet another display substrate provided by at least one embodiment of the present disclosure.

[0133] For example, the difference between the display substrate shown in FIG11 and the display substrate shown in FIG10 is that the pixel defining portion 230 in the third area A3 is different, and the rest of the structures are the same. For details, please refer to the relevant description of the above embodiment, which will not be repeated here.

[0134] For example, as shown in FIG11 , the plurality of openings 201 in the pixel defining layer 200 include a third opening 2300, and the third opening 2300 is located in the third area A3. The display substrate includes at least one second defining structure 500, and the at least one second defining structure 500 includes a second sub-defining structure 520. The second sub-defining structure 520 includes a third portion 330 overlapping with the pixel defining portion 230 and a fourth portion 340 exposed by the third opening 2300. The fourth portion 340 of the second sub-defining structure 520 is configured to block at least one layer of the light-emitting functional layer 130.

[0135] For example, as shown in Figure 11, a portion of the pixel defining portion 230 can be located in a portion of the third area A3 adjacent to the first area A1. The third portion 330 of the second sub-defining structure 520 is covered by this portion of the pixel defining portion 230, thereby ensuring electrode flatness for the sub-pixels 10 in the first area A1 and achieving good light extraction. For example, the edge of the fourth portion 340 of the second sub-defining structure 520, distal to the third portion 330, is configured to isolate at least one layer of the light-emitting functional layer 130, thereby reducing the likelihood of crosstalk. For example, when only one second sub-defining structure 520 is provided in the third area A3, the pixel defining portion 230 is not provided on the side of the third portion 330 of the second sub-defining structure 520 distal to the first area A1, thereby simplifying the manufacturing process.

[0136] For example, in some embodiments, referring to FIG. 11 , the display substrate includes at least one second confining structure 500, and the at least one second confining structure 500 includes at least one first sub-confining structure 510 and at least one second sub-confining structure 520. For example, the first sub-confining structure 510 is closer to the second area A2 than the second sub-confining structure 520. For example, there may be only one second sub-confining structure 520, thereby facilitating planarization of the electrodes of the sub-pixels 10 in the first area A1 by partially covering the pixel-defining portion 230 on the third portion 330 of the second sub-confining structure 520, thereby achieving good light extraction. For example, the fourth portion 540 of the second sub-confining structure 520 and the at least one first sub-confining structure 510 are both exposed by the third opening 2300. Thus, the fourth portion 340 of the second sub-confining structure 520 and the first sub-confining structure 510 collectively isolate at least one layer of the light-emitting functional layer 130, effectively reducing the risk of crosstalk and simplifying the manufacturing process.

[0137] For example, as shown in FIG11 , the display substrate may further include a third confinement structure 600. The third confinement structure 600 is located in the third area A3 and between the second confinement structure 500 and the second area A2. The pixel defining portion 230 is located on a side of the third confinement structure 600 away from the second area A2. The third confinement structure 600 is configured to block at least one film layer of the light-emitting functional layer 130. For example, the third confinement structure 600 is closer to the base substrate 01 than the second confinement structure 500. For example, the structure of the third confinement structure 600 may be similar to the first sub-confinement structure 510 described in the above embodiment, and it may further block at least one film layer of the light-emitting functional layer 130 to further reduce the risk of crosstalk.

[0138] For example, as shown in FIG11 , the edge of the surface of at least one of the first confinement structure 300, the second confinement structure 500, and the third confinement structure 600, which is away from the substrate 01, is protruding relative to the edge of the surface near the substrate 01. For example, at least a portion of the surface of at least one of the first confinement structure 300, the second confinement structure 500, and the third confinement structure 600, which is away from the substrate 01, is parallel to the substrate, and the edge of this surface extends beyond the edge of the surface of at least one of the first confinement structure 300, the second confinement structure 500, and the third confinement structure 600, which is near the substrate 01. For example, such an arrangement can facilitate the formation of an "undercut" structure, facilitating the isolation of at least one layer of the light-emitting functional layer 130. For example, a cross-section of at least one of the first confinement structure 300, the second confinement structure 500, and the third confinement structure 600, taken along a plane parallel to the arrangement direction of two adjacent sub-pixels 10 of different colors (the third sub-pixel 103 and the second sub-pixel 102 shown in FIG11 ) and perpendicular to the substrate 01, has a trapezoidal shape. For example, the first confining structure 300, the second confining structure 500, and the third confining structure 600 can be made of the same material, for example, a negative photoresist, and the embodiments of the present disclosure are not limited to this. For example, the first confining structure 300, the second confining structure 500, and the third confining structure 600 can be manufactured using the same process, thereby simplifying the process. In some embodiments, the structures of the first confining structure 300, the second confining structure 500, and the third confining structure 600 can be different, for example, the dimensions of the first confining structure 300, the second confining structure 500, and the third confining structure 600 in the direction Z can be different, and the embodiments of the present disclosure are not limited to this.

[0139] Another embodiment of the present disclosure provides a display panel, which includes any of the above-mentioned display substrates. Therefore, the technical effects of the above-mentioned display substrates can also be reflected on the display panel, which will not be repeated here. For example, the display panel may also include an Enhanced Efficiency Structure (EES) located on the display substrate (for example, located on its encapsulation layer) to enhance the light extraction efficiency. For example, the display panel may also include a color film. For example, the color film may be located on the side of the EES away from the display substrate, but is not limited to this. By providing the color film, the color intensity of the light can be enhanced. For example, the display panel may also be provided with other film layers, which are not limited in the embodiments of the present disclosure.

[0140] Another embodiment of the present disclosure provides a display device, which includes any of the above-mentioned display substrates. Therefore, the technical effects of the above-mentioned display substrates can also be reflected in the display device, which will not be described in detail here.

[0141] For example, the display device further includes a cover plate located on the light-emitting side of the display substrate.

[0142] For example, the display device can be a display device such as an organic light emitting diode display device, as well as any product or component with a display function, such as a television, digital camera, mobile phone, watch, tablet computer, laptop computer, navigator, etc. that includes the display device, but this embodiment is not limited to this.

[0143] Tandem technology stacks the sub-pixel's light-emitting layers in series, with a full charge generation layer (CGL) placed between the stacked layers. This layer consists of a P-type doped charge generation layer (P-CGL) and an N-type doped charge generation layer (N-CGL). Compared to display substrates without a Tandem device, a Tandem device uses an N / P-CGL heterojunction, connecting the two light-emitting layers in series. This technology achieves dual-light-emitting device series connection, significantly reducing the device's luminous current while maintaining the same luminous intensity, extending the lifespan of the organic light-emitting element and reducing power consumption.

[0144] During the research, the inventors of the present application found that: on the one hand, the Tandem device uses a stacked light-emitting layer, which places high demands on materials and evaporation; on the other hand, the conductivity of the charge generation layer in the Tandem device is relatively large. For example, when the charge generation layer is a whole-surface film layer, the charge generation layer of two adjacent sub-pixels is a continuous film layer, and there is a phenomenon of lateral charge migration, which causes the display substrate to shift in low grayscale monochrome chromaticity, such as easily causing crosstalk between adjacent sub-pixels, resulting in color deviation of the display substrate. For example, the charge generation layer easily causes crosstalk between sub-pixels of different colors at low brightness, thereby causing low grayscale color deviation.

[0145] The embodiments of the present disclosure provide a display substrate and a display device. The display substrate includes a base substrate, a plurality of sub-pixels located on the base substrate, a pixel defining pattern, and a defining structure. Each sub-pixel in at least some of the sub-pixels includes a light-emitting functional layer, and the light-emitting functional layer includes a plurality of film layers; the pixel defining pattern includes a plurality of openings and a pixel defining portion surrounding the plurality of openings, and at least a portion of at least one layer of the light-emitting functional layer is isolated in at least one opening; the defining structure is located between the pixel defining portion and the base substrate. The defining structure is located at least between two adjacent sub-pixels of different colors, and the defining structure includes a first portion covered by the pixel defining portion and a second portion exposed by the opening, and the second portion of the defining structure is configured to isolate at least one layer of the light-emitting functional layer; the material of the defining structure includes an organic material, and the orthographic projection of the edge of the side of the second portion of the defining structure away from the base substrate on the base substrate falls within the orthographic projection of the opening on the base substrate.

[0146] The first part of the limiting structure using organic materials provided by the present disclosure is covered by the pixel limiting part, and while the second part is exposed by at least one opening, the orthographic projection of the edge of the side of the second part away from the side of the substrate falls within the orthographic projection of the opening on the substrate. This not only can separate at least one layer of the light-emitting functional layer between sub-pixels of different colors to reduce crosstalk, but also can ensure the flatness of the electrode of the sub-pixel and the normal light output effect, while minimizing the impact of the limiting structure on the process and production capacity.

[0147] The display substrate and the display device provided by the embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0148] Fig. 12 is a schematic diagram of a partial planar structure provided according to an example of an embodiment of the present disclosure. Fig. 13 is a schematic diagram of a partial cross-sectional structure taken along line AA' shown in Fig. 12 .

[0149] As shown in Figures 12 and 13, the display substrate includes a base substrate 01, a plurality of sub-pixels 10 located on the base substrate 01, a pixel-defining pattern 200, and a defining structure 300. Each of at least some of the sub-pixels 10 includes a light-emitting functional layer 130, which includes multiple film layers. For example, at least some of the sub-pixels 10 are located in the display area of ​​the display substrate, i.e., the area used to display images. The display substrate also includes a peripheral area surrounding the display area.

[0150] For example, as shown in Figure 13, the sub-pixel 10 also includes a first electrode 110 and a second electrode 120 located on both sides of the light-emitting functional layer 130 along a direction perpendicular to the base substrate 01 (such as a direction perpendicular to the XY plane shown in Figure 12), and the first electrode 110 is located between the light-emitting functional layer 130 and the base substrate 01.

[0151] For example, as shown in FIG13 , 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 (EML) 131, a charge generation layer (CGL) 133, and a second light-emitting layer (EML) 132, which are stacked, with the charge generation layer 133 being located between the first light-emitting layer 131 and the second light-emitting layer 132. The thicknesses of the multiple film layers included in the light-emitting functional layer 130 shown in FIG13 are only for the purpose of clearly illustrating the film layers and do not represent actual sizes.

[0152] For example, as shown in FIG13 , the charge generation layer 133 has strong conductivity, which can make the light-emitting functional layer 130 have the advantages of long life, low power consumption, and high brightness. For example, the same sub-pixel 10 can include a tandem light-emitting element, such as a tandem OLED. Of course, the embodiments of the present disclosure are not limited to this, and the light-emitting functional layer 130 of each sub-pixel 10 can also include only one light-emitting layer.

[0153] For example, as shown in FIG13 , in the same sub-pixel 10, the first light-emitting layer 131 and the second light-emitting layer 132 may be light-emitting layers that emit the same color of light. For example, the first light-emitting layer 131 in the sub-pixel 10 that emits light of different colors emits light of different colors. For example, the second light-emitting layer 132 in the sub-pixel 10 that emits light of different colors emits light of different colors. Of course, the embodiments of the present disclosure are not limited thereto. For example, in the same sub-pixel 10, the first light-emitting layer 131 and the second light-emitting layer 132 may be light-emitting layers that emit light of different colors. By providing light-emitting layers that emit light of different colors in the same sub-pixel 10, the light emitted by the multiple light-emitting layers included in the sub-pixel 10 can be mixed into white light, and the color of the light emitted from each sub-pixel 10 can be adjusted by providing a color filter layer.

[0154] For example, in each sub-pixel 10 , the light emitting functional layer 130 may further include a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL).

[0155] 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 layers of the plurality of sub-pixels 10 and can be referred to as common layers.

[0156] For example, as shown in FIG13 , the second light-emitting layer 132 can be positioned between the first light-emitting layer 131 and the second electrode 120, and the hole injection layer can be positioned between the first electrode 110 and the first light-emitting layer 131. For example, an electron transport layer can be positioned between the charge generation layer 133 and the first light-emitting layer 131. For example, a hole transport layer can be positioned between the second light-emitting layer 132 and the charge generation layer 133. For example, an electron transport layer and an electron injection layer can be positioned between the second light-emitting layer 132 and the second electrode 120.

[0157] For example, the charge generation layer 133 may include an N-type charge generation layer and a P-type charge generation layer.

[0158] For example, the materials of the electron transport layer may include aromatic heterocyclic compounds, such as imidazole derivatives such as benzimidazole derivatives, imidazopyridine derivatives, and benzimidazolephenanthridine derivatives; oxazine derivatives such as pyrimidine derivatives and triazine derivatives; quinoline derivatives, isoquinoline derivatives, phenanthroline derivatives, and other compounds containing a nitrogen-containing six-membered ring structure (including compounds having phosphine oxide-based substituents on the heterocyclic ring), etc.

[0159] For example, the material of the charge generation layer 133 may be a material containing a phosphorus-oxygen group or a material containing triazine.

[0160] For example, the ratio of the electron mobility of the material of the charge generation layer 133 to the electron mobility of the electron transport layer is 10 -2 ~10 2 .

[0161] For example, the first electrode 110 may be an anode, and the second electrode 120 may be a cathode. For example, the cathode may be formed of a material with high conductivity and low work function, such as a metal material. For example, the anode may be formed of a transparent conductive material with a high work function.

[0162] 13 schematically shows that there are gaps between the light-emitting layers of different sub-pixels 10. For example, the orthographic projection area of ​​the charge generation layer 133 on the base substrate 01 is larger than the orthographic projection area of ​​any light-emitting layer on the base substrate 01.

[0163] For example, as shown in Figure 13, other structures 02 are also provided on the side of the first electrode 110 facing the base substrate 01, such as pixel circuits, signal lines and various insulating layers electrically connected to the first electrode 110 of the sub-pixel 10, such as a passivation layer, a buffer layer, a gate insulating layer, an interlayer insulating layer, etc.

[0164] As shown in FIG. 12 and FIG. 13 , the pixel defining pattern 200 includes a plurality of openings 201 and a pixel defining portion 230 surrounding the plurality of openings 201 . At least a portion of at least one layer of the light emitting functional layer 130 is separated in at least one opening 201 .

[0165] In some examples, as shown in Figures 12 and 13, the plurality of openings 201 includes a plurality of first openings 210 and a plurality of second openings 220. The plurality of first openings 210 are configured to define the light-emitting region 010 of at least a portion of the sub-pixel 10. At least a portion of at least one layer of the light-emitting functional layer 130 located in the first opening 210 is continuous, and at least a portion located in at least one second opening 220 is interrupted. Figures 12 and 13 schematically illustrate that the portion of the film layer in the light-emitting functional layer 130 located in the first opening 210 is continuous, and the portion located in the second opening 220 is interrupted.

[0166] For example, as shown in Figures 12 and 13 , a sub-pixel 10 corresponds to at least one first opening 210. At least a portion of the light-emitting functional layer 130 of the sub-pixel 10 is located in the first opening 210 corresponding to the sub-pixel 10, and the first opening 210 is configured to expose the first electrode 110. Figure 12 only shows the light-emitting region 010 and the first electrode 110 of the sub-pixel, and does not show the second electrode 120. The second electrode 120 may be a continuously disposed film layer at least at a position outside the second opening 220.

[0167] For example, as shown in FIG13 , 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. For example, the first opening 210 of the pixel-defining pattern 200 is used to define the light-emitting region 010 of the sub-pixel 10. The light-emitting region 010 can refer to the region of the sub-pixel 10 that effectively emits light. The shape of the light-emitting region 010 refers to a two-dimensional shape. For example, the shape of the light-emitting region 010 can be the same as the shape of the first opening 210 of the pixel-defining pattern 200.

[0168] For example, as shown in FIG. 13 , the material of the pixel defining portion 230 may include polyimide, acryl, polyethylene terephthalate, or the like.

[0169] As shown in Figures 12 and 13, the defining structure 300 is located at least between two adjacent sub-pixels 10 of different colors. The defining structure 300 includes a first portion 310 covered by the pixel defining portion 230 and a second portion 320 exposed by the opening 201. The second portion 320 of the defining structure 300 is configured to isolate at least one layer of the light-emitting functional layer 130.

[0170] In some examples, as shown in Figures 12 and 13, the defining structure 300 is located between the pixel defining portion 230 and the base substrate 01, and the defining structure 300 is located at least between two adjacent sub-pixels 10 of different colors. The defining structure 300 includes a first portion 310 covered by the pixel defining portion 230 and a second portion 320 exposed by at least one of the first opening 210 and the second opening 220. The second portion 320 of the defining structure 300 is configured to isolate at least one layer of the light-emitting functional layer 130, such as isolating the charge generation layer in the light-emitting functional layer 130, such as isolating all film layers in the light-emitting functional layer.

[0171] For example, as shown in Figures 12 and 13 , the orthographic projection of the first portion 310 of the defining structure 300 on the substrate 01 overlaps with the orthographic projection of the pixel defining portion 230 on the substrate 01, and the orthographic projection of the second portion 320 of the defining structure 300 on the substrate 01 does not overlap with the orthographic projection of the pixel defining portion 230 on the substrate 01. For example, the defining structure 300 includes two edges, one edge being the edge of the first portion 310 and the other edge being the edge of the second portion 320. The edge of the first portion 310 is covered by the pixel defining portion 230, and the edge of the second portion 320 is exposed by at least one of the first opening 210 and the second opening 220.

[0172] Figures 12 and 13 schematically illustrate that the second portion 320 of the defining structure 300 is exposed by the second opening 220 of the pixel defining pattern 200. For example, as shown in Figure 13 , in a direction parallel to the base substrate 01, a certain distance exists between the edge of the defining structure 300 exposed by the second opening 220 and the pixel defining portion 230, and this distance includes the separated film layer of the light-emitting functional layer 130.

[0173] As shown in FIG13 , the material of the defining structure 300 includes an organic material, and the orthographic projection of the edge of the side of the second portion 320 of the defining structure 300 away from the base substrate 01 falls within the orthographic projection of the opening 201 on the base substrate 01 .

[0174] For example, as shown in Figure 13, the angle α between the side surface of the second portion 320 of the defining structure 300 and the plane of the surface of the defining structure 300 close to the substrate 01 is greater than 20 degrees and less than 90 degrees. The angle between the side surface of the defining structure 300 and the plane is an acute angle.

[0175] The first part of the limiting structure using organic materials provided by the present disclosure is covered by the pixel limiting part, and the second part is exposed by at least one of the first opening and the second opening, while the positive projection of the edge of the side of the second part of the limiting structure away from the side of the substrate falls within the positive projection of the opening on the substrate. This can not only isolate at least one layer of the light-emitting functional layer between sub-pixels of different colors to reduce crosstalk, but also ensure the flatness of the electrode of the sub-pixel and the normal light output effect, while minimizing the impact of the limiting structure on the process and production capacity.

[0176] Compared to the significant impact of inorganic material definition structures on production capacity during the display substrate manufacturing process, the definition structures provided by the present disclosure using organic materials can be formed after the first electrode of the sub-pixel, or, if the definition structure and the first electrode of the sub-pixel do not overlap, before the first electrode is formed. Both of these aspects do not affect the flatness of the first electrode, minimizing the impact on the process and production capacity. For example, the pixel definition pattern is patterned after the first electrode and definition structure are formed.

[0177] For example, as shown in Figure 13, the angle α between the side surface of the second portion 320 of the defining structure 300 and the plane of the surface of the defining structure 300 on the side away from the base substrate 01 is greater than 20 degrees and less than 90 degrees. For example, the connection between the side surface of the second portion 320 of the defining structure 300 and the surface of the defining structure 300 on the side away from the base substrate 01 can be rounded, and the angle between the extended planes of the two surfaces can be α.

[0178] For example, as shown in FIG13 , the angle α may be 30 to 70 degrees. For example, the angle α may be 30 to 60 degrees. For example, the angle α may be 25 to 45 degrees. For example, the angle α may be 35 to 60 degrees. For example, the angle α may be 45 to 80 degrees. For example, the angle α may be 65 to 80 degrees. For example, the angle α may be 71 to 75 degrees.

[0179] For example, as shown in FIG. 12 and FIG. 13 , the material of the defining structure 300 may be organic glue.

[0180] In some examples, as shown in Figures 12 and 13 , the cross-section of the defining structure 300 taken along a plane parallel to the arrangement direction of two adjacent sub-pixels 10 of different colors and perpendicular to the base substrate 01 has a trapezoidal shape. For example, the plane may be a plane parallel to line AA' and perpendicular to the XY plane. For example, the plane may be a plane perpendicular to the extension direction of the defining structure 300.

[0181] In some examples, as shown in Figures 12 and 13, the length of the first base 301 of the trapezoid away from the base substrate 01 is greater than the length of the second base 302 of the trapezoid close to the base substrate 01; the angle between the first base 301 and the waist of the trapezoid is greater than 20 degrees and less than 90 degrees, and the lengths of the first base 301 and the second base 302 are both no greater than 10 microns.

[0182] By setting the limiting structure as a structure with a trapezoidal cross-section, it is advantageous to isolate at least one layer of the light-emitting functional layer, thereby preventing crosstalk between two adjacent sub-pixels of different colors.

[0183] For example, as shown in FIG13 , the lengths of the first bottom edge 301 and the second bottom edge 302 are both no greater than 10 microns. For example, the lengths of the first bottom edge 301 and the second bottom edge 302 are both greater than 1 micron. For example, the lengths of the first bottom edge 301 and the second bottom edge 302 are both greater than 2 microns. For example, the length of the first bottom edge 301 is greater than 5 microns. For example, the length of the second bottom edge 302 is less than 8 microns. For example, the lengths of the first bottom edge 301 and the second bottom edge 302 are both greater than 3 microns. In the embodiments of the present disclosure, the first bottom edge 301 and the second bottom edge 302 can be any value between greater than 0 and less than 10 microns, and are not listed here one by one.

[0184] In some examples, as shown in FIG13 , the thickness of the defining structure 300 is no greater than 5 microns, and the edge of the second portion 320 of the defining structure 300 that is away from the surface of the side of the substrate 01 protrudes relative to the edge of the surface of the side of the substrate 01 that is close to the substrate, and the size of the protrusion is no greater than 5 microns.

[0185] For example, as shown in FIG13 , along the extension direction of line AA′, the surface of the second portion 320 of the defining structure 300 on the side away from the substrate 01 protrudes relative to the surface on the side close to the substrate 01, and the protrusion is no greater than 5 microns. For example, with the surface of the second portion 320 of the defining structure 300 on the side away from the substrate 01 being the upper surface, and the surface of the second portion 320 of the defining structure 300 on the side close to the substrate 01 being the lower surface, the protrusion of the edge of the upper surface relative to the edge of the lower surface can be 1 micron, 2 microns, 3 microns, or 4 microns. In the embodiments of the present disclosure, the protrusion of the edge of the upper surface relative to the edge of the lower surface can be any value between greater than 0 and less than 5 microns, and no further examples are given here.

[0186] In some examples, as shown in FIG13 , the angle between the side surface of the second portion 320 of the defining structure 300 and the plane of the first surface of the defining structure 300 on the side close to the substrate 01 (e.g., the surface on which the first bottom edge 301 of the cross section is located) is greater than 20 degrees and less than 90 degrees; the orthographic projection of the first surface on the substrate 01 falls within the orthographic projection of the second surface of the second portion 320 on the side away from the substrate 01 (e.g., the surface on which the second bottom edge 302 of the cross section is located) on the substrate 01, and the distance between the orthographic projection of the edge of the first surface and the orthographic projection of the edge of the second surface is no greater than 5 microns. For example, the distance between the orthographic projection of the edge of the first surface and the orthographic projection of the edge of the second surface is no greater than 4 microns, or no greater than 3 microns, or no greater than 2 microns, etc. The distance between the orthographic projection of the edge of the first surface and the orthographic projection of the edge of the second surface can be any value between greater than 0 and less than 5 microns, and no further examples are given here.

[0187] For example, as shown in FIG13 , the thickness of the defining structure 300 is greater than 1 micron. For example, the thickness of the defining structure 300 may be 1.5 to 2 microns. For example, the thickness of the defining structure 300 is not greater than 4.5 microns. For example, the thickness of the defining structure 300 is not greater than 4 microns. For example, the thickness of the defining structure 300 is not greater than 3.5 microns. For example, the thickness of the defining structure 300 is not greater than 3 microns. For example, the thickness of the defining structure 300 is not greater than 2.5 microns. The thickness of the defining structure 300 provided in the embodiment of the present disclosure may be any value greater than 0 and less than 5 microns, which will not be listed here one by one.

[0188] In some examples, as shown in FIG13 , the thickness of the defining structure 300 is greater than the thickness of the first electrode 110, and the thickness of at least a portion of the pixel defining portion 230 that does not overlap with the defining structure 300 in a direction perpendicular to the base substrate 01 is greater than the thickness of the defining structure 300. By configuring the thickness relationship between the defining structure 300, the first electrode 110, and the pixel defining portion 230, at least one layer of the light-emitting functional layer 130 of adjacent sub-pixels of different colors can be isolated to reduce crosstalk without affecting the normal light-emitting state of the sub-pixels.

[0189] For example, as shown in FIG13 , the distance between the surface of the pixel defining portion 230 at the overlapped position with the defining structure 300, which is away from the substrate 01, and the substrate 01 is H1. The distance between the surface of the pixel defining portion 230 at the overlapped position with the defining structure 300, which is away from the substrate 01, and the substrate 01 is H2 or H3. Both H2 and H3 are smaller than H1. For example, the difference between H1 and H2 is no greater than 5 microns. For example, the difference between H1 and H3 is no greater than 5 microns.

[0190] For example, as shown in FIG13 , the thickness of the overlapping portion of the pixel defining portion 230 and the defining structure 300 can be 2 to 3 microns, such as 2.5 to 2.8 microns, such as 2.735 microns. For example, the thickness of the pixel defining portion 230 can be 1.1 to 1.5 microns, such as 1.217 microns, and the thickness of the defining structure 300 can be 1.3 to 1.7 microns, such as 1.518 microns.

[0191] In some examples, as shown in Figures 12 and 13, the orthographic projection of the defining structure 300 on the base substrate 01 does not overlap with the orthographic projection of the first opening 210 on the base substrate 01, and the second opening 220 exposes the second portion 320 of the defining structure 300. For example, the defining structure 300 is exposed only by the second opening 220 of the pixel defining pattern 200, and the second portion 320 of the defining structure 300 exposed by the second opening 220 blocks at least one layer of the light-emitting functional layer 130, such as the charge generation layer, or the charge generation layer and all layers thereof facing the base substrate 01, such as all layers in the light-emitting functional layer 130. For example, the second electrode 120 is blocked at the edge of the defining structure 300 exposed by the second opening 220.

[0192] For example, as shown in FIG13 , the portion of the defining structure 300 not covered by the pixel defining portion 230 , such as the second portion 320 , has a size in the AA′ line extending direction of no more than 10 microns on the surface of the side away from the base substrate 01 .

[0193] In some examples, as shown in Figures 12 and 13, an insulating layer 03 is further disposed between the first electrode 110 and the base substrate 01. The first electrode 110 and the confining structure 300 are both in contact with the insulating layer 03. The confining structure 300 is spaced apart from the first electrode 110, and the distance between the confining structure 300 and the first electrode 110 closest to it is no greater than 10 microns. The first electrode 110 closest to the confining structure 300 refers to the confining structure 300 and the first electrode 110 that are simultaneously covered by the pixel defining portion 230 located between the first opening 210 and the second opening 220. The distance between the confining structure 300 and the first electrode 110 closest to it refers to the distance between the bottom edge of the confining structure 300 on the side closest to the base substrate 01 and the first electrode 110. When spacing the confining structure 300 from the first electrode 110, the distance between the first electrode 110 and the confining structure 300 must be considered to ensure that the confining structure 300 does not affect the light extraction performance of the sub-pixel 10.

[0194] For example, as shown in FIG13 , the insulating layer 03 may be a flat layer.

[0195] For example, as shown in FIG13 , the distance between the defining structure 300 and the first electrode 110 is greater than 1 micron. For example, the distance between the defining structure 300 and the first electrode 110 is no greater than 9 microns. For example, the distance between the defining structure 300 and the first electrode 110 can be 2 to 8 microns. In the embodiments of the present disclosure, the distance between the defining structure 300 and the first electrode 110 can be any value between greater than 0 and less than 10 microns, and no further examples are given here.

[0196] For example, as shown in Figure 13, when the limiting structure 300 is spaced apart from the first electrode 110, the first electrode 110 can be patterned first, and then the limiting structure 300 can be patterned to prevent affecting the flatness of the first electrode 110; or the limiting structure 300 can be patterned first, and then the first electrode 110 can be patterned to ensure the outline of the first opening 210 of the pixel limiting pattern 200.

[0197] In some examples, as shown in Figures 12 and 13 , the portion of the defining structure 300 located between two adjacent sub-pixels 10 of different colors includes at least one sub-definition structure 330. For example, the defining structure 300 may include multiple sub-definition structures 330, with at least one sub-definition structure 330 disposed between two adjacent sub-pixels 10 of different colors. The display substrate shown in Figure 12 schematically illustrates one sub-definition structure 330 disposed between two adjacent sub-pixels 10 of different colors.

[0198] In some examples, as shown in FIG. 12 , two adjacent sub-pixels 10 of different colors include a first sub-pixel 101 and a second sub-pixel 102 .

[0199] In some examples, as shown in FIG12 , the first color sub-pixel 101 includes a red sub-pixel or a green sub-pixel, and the second color sub-pixel 102 includes a blue sub-pixel. For example, FIG12 schematically illustrates that the first color sub-pixel 101 is a green sub-pixel, and the second color sub-pixel 102 is a blue sub-pixel. For example, the plurality of sub-pixels 10 further includes a third color sub-pixel 103, and the third color sub-pixel 103 is a red sub-pixel. The disclosed embodiments are not limited thereto, and the colors of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 can be interchanged.

[0200] For example, as shown in FIG12 , the area of ​​the light-emitting region 010 of a blue sub-pixel is larger than that of the light-emitting region 010 of a red sub-pixel, and the area of ​​the light-emitting region 010 of a red sub-pixel is larger than that of the light-emitting region 010 of a green sub-pixel.

[0201] For example, as shown in FIG12 , the sub-pixel 10 includes a first pixel group and a second pixel group alternately arranged in the Y direction. The first pixel group and the second pixel group are staggered in the X direction. The first pixel group includes red sub-pixels and blue sub-pixels alternately arranged in the X direction, and the second pixel group includes green sub-pixels arranged in the X direction. For example, one red sub-pixel is surrounded by four green sub-pixels, and one blue sub-pixel is surrounded by four green sub-pixels.

[0202] In some examples, as shown in FIG12 , at least one sub-defining structure 330 includes a ring-shaped sub-defining structure 330 surrounding the light-emitting region 010 of at least one sub-pixel 10. For example, the light-emitting regions 010 of sub-pixels 10 of the same color are surrounded by the ring-shaped sub-defining structure 330 to improve the uniformity of the height of the pixel-defining portion 230 around the light-emitting region 010.

[0203] For example, as shown in FIG12 , the light-emitting area 010 of the third color sub-pixel 103 is surrounded by the annular sub-defining structure 330. For example, the light-emitting area 010 of the red sub-pixel is surrounded by the annular sub-defining structure 330. Of course, the embodiments of the present disclosure are not limited thereto. For example, the light-emitting area 010 of the green sub-pixel is surrounded by the annular sub-defining structure 330.

[0204] For example, as shown in Figure 12, the orthographic projection of the annular sub-defining structure 330 on the substrate 01 overlaps with the orthographic projection of the first electrode 110 of the third color sub-pixel 103 on the substrate 01. For example, the annular sub-defining structure 330 is located between the first color sub-pixel 101 and the third color sub-pixel 103, and the orthographic projection of the annular sub-defining structure 330 on the substrate 01 overlaps with the orthographic projection of the first electrode 110 of the first color sub-pixel 101 on the substrate 01.

[0205] For example, as shown in FIG12 , a stripe-shaped sub-defining structure 330 is disposed between the first color sub-pixel 101 and the third color sub-pixel 103. For example, the light-emitting region 010 of the first color sub-pixel 101 is in the shape of a quadrilateral, e.g., comprising two parallel long sides and two parallel short sides, the two long sides and the two short sides being connected end to end. For example, the stripe-shaped sub-defining structure 330 is located on one side of the long side of the light-emitting region 010 of the first color sub-pixel 101, e.g., the stripe-shaped sub-defining structure 330 is disposed parallel to the long side of the light-emitting region 010 of the first color sub-pixel 101.

[0206] For example, as shown in Figure 12, along the extension direction of the long side of the light-emitting area 010 of the first color sub-pixel 101, the length of the strip sub-defining structure 330 is greater than the length of the long side, so as to provide the possibility of better isolating at least one layer of the light-emitting functional layer 130 between the first color sub-pixel 101 and the second color sub-pixel 102.

[0207] In some examples, as shown in FIG12 , at least one second opening 220 is in the shape of an elongated strip, and at least one second opening 220 is located between two adjacent sub-pixels 10 of different colors, with the long side of the elongated strip being perpendicular to the arrangement direction of the two adjacent sub-pixels 10 of different colors. For example, each second opening 220 is in the shape of an elongated strip.

[0208] For example, as shown in Figure 12, the second opening 220 having a long strip shape is parallel to the strip sub-defining structure 330, and the length of the second opening 220 is not greater than the length of the strip sub-defining structure 330. Therefore, the length of the second opening 220 determines the size of at least one layer used to isolate the light-emitting functional layer, thereby determining the degree of crosstalk between two adjacent sub-pixels 10 of different colors.

[0209] For example, as shown in FIG12 , the length of the second openings 220 on both sides of the long sides of the light-emitting area 010 of the first color sub-pixel 101 is the same as the length of the exposed strip-shaped sub-defining structures 330. In this case, it is necessary to control the uniformity of the second openings and the sub-defining structures at different locations in the pixel-defining pattern to ensure a uniform isolation effect for at least one layer of the light-emitting functional layer.

[0210] In some examples, as shown in FIG12 , the long side of the elongated second opening 220 is parallel to the side of the first opening 210 closest to it. For example, the first opening 210 closest to the long side of the elongated second opening 220 is the first opening 210 that exposes the first electrode 110 of the first color sub-pixel 101 or the second color sub-pixel 102, and the long side of the elongated second opening 220 is parallel to the side of the first opening 210. For example, the adjacent sides of the light-emitting areas 010 of the first color sub-pixel 101 and the adjacent second color sub-pixel 102 are arranged in parallel, and the long side of the second opening 220 located between the adjacent first color sub-pixel 101 and the second color sub-pixel 102 is parallel to the sides of the light-emitting areas 010 of the two color sub-pixels.

[0211] For example, as shown in Figure 12, the orthographic projection of the strip sub-defining structure 330 located between the first color sub-pixel 101 and the second color sub-pixel 102 on the substrate 01 overlaps with the orthographic projection of the first electrode 110 of at least one of the first color sub-pixel 101 and the second color sub-pixel 102 on the substrate 01.

[0212] For example, as shown in Figure 12, the number of second openings 220 for exposing the annular sub-defining structure 330 surrounding the same third color sub-pixel 103 is four, each second opening 220 is in the shape of a long strip, and the long sides of the four second openings 220 are respectively parallel to the four sides of the quadrilateral light-emitting area 010 of the third color sub-pixel 103.

[0213] 12 , the lengths of the long sides of the four second openings 220 surrounding the third color sub-pixel 103 are all greater than the side lengths of the light-emitting area 010 of the third color sub-pixel 103. For example, the four second openings 220 surrounding the third color sub-pixel 103 are all located between the third color sub-pixel 103 and the first color sub-pixel 101.

[0214] FIG14 is a partial enlarged view of the display substrate shown in FIG12.

[0215] For example, as shown in Figures 12 and 14, the distances between the four sides of the light-emitting area 010 of the third color sub-pixel 103 and the edge of the annular sub-defining structure 330 exposed by the second opening 220 are a, b, c, and d, respectively. For example, the value ranges of a, b, c, and d include: 0≤a≤20μm, 0≤b≤20μm, 0≤c≤20μm, and 0≤d≤20μm. For example, a, b, c, and d can all be equal, or at least one can be different from the other three. For example, the distances between the above-mentioned annular sub-defining structure 330 and the light-emitting areas 010 of the four first color sub-pixels 101 surrounding it are a', b', c', and d', respectively. For example, the value ranges of a', b', c', and d' include: 0≤a'≤20μm, 0≤b'≤20μm, 0≤c'≤20μm, and 0≤d'≤20μm. For example, a', b', c', and d' can all be equal, or at least one can be unequal to the other three, such as a'=c'≠b'=d', or a'≠b'≠c'≠d'. For example, the first color sub-pixel 101 is provided with a long strip-shaped sub-defining structure 330 only on one side of the long side of its light-emitting area 010. The distances between the long side of the light-emitting area 010 of the first color sub-pixel 101 and the two adjacent long strip-shaped sub-defining structures 330 are e and f, respectively. For example, the value ranges of e and f include: 0≤e≤20μm, 0≤f≤20μm. For example, e and f can be equal or unequal. For example, the second opening 220 can be a groove located between the sub-pixels 10 in the pixel defining pattern 200. The width of the defining structure 300 needs to take into account the width of the second opening 220, and the width of the second opening 220 needs to take into account the distance between the light-emitting areas 010 of adjacent sub-pixels 10. The width of the second opening 220 is g, and the value range of g includes: 0≤g≤20μm. For example, the width of the second opening 220 at different positions can be equal. For example, the width of the sub-defining structure 330 can be h, and the value range of h includes: 0≤h≤5μm. For example, the overlapping width of the second opening 220 and the sub-defining structure 330 needs to take into account the partition effect of the material of the light-emitting functional layer 130, such as the overlapping width is between 0 and h.

[0216] In some examples, as shown in FIG12 , at least one sub-defining structure 330 includes a sub-defining structure 330, wherein an edge of a first portion 310 of the sub-defining structure 330 is closer to an edge of the light-emitting region 010 of the first color sub-pixel 101. For example, a sub-defining structure 330 is disposed between the first color sub-pixel 101 and the second color sub-pixel 102, and a distance between the sub-defining structure 330 and the light-emitting region 010 of the first color sub-pixel 101 is smaller than a distance between the sub-defining structure 330 and the light-emitting region 010 of the second color sub-pixel 102.

[0217] For example, as shown in FIG. 12 , a sub-definition structure 330 is disposed between the first color sub-pixel 101 and the third color sub-pixel 103 , and the sub-definition structure 330 is closer to the third color sub-pixel 103 .

[0218] For example, as shown in FIG12 , only the edge of the second portion 320 of the confinement structure 300 serves to block the light-emitting functional layer 130. Positioning this edge closer to the red sub-pixel maximizes the blocking effect on the red sub-pixel, but this is not limited to the embodiment of the present invention; this edge can also be positioned closer to the green sub-pixel. For example, FIG12 schematically illustrates that the portion of the confinement structure 300's edge serving to block the light-emitting functional layer 130, located between the blue and green sub-pixels, is closer to the green sub-pixel. However, this embodiment of the present invention is not limited to the embodiment of the present invention; this edge can also be positioned closer to the blue sub-pixel. For example, the annular sub-confinement structure 330 surrounding the red sub-pixel can also be configured to have a strip-shaped sub-confinement structure 330 located on either side of the green sub-pixel. For example, the strip-shaped sub-confinement structures 330 located on either side of the green sub-pixel can also be configured as annular sub-confinement structures 330. For example, the second opening 220 cannot be configured as a closed ring structure surrounding any one light-emitting area 010. For example, the number of second openings 220 surrounding any light-emitting area 010 can be multiple, spaced apart, and the size of the second openings 220 depends on the process.

[0219] In some examples, as shown in FIG12 , two sub-defining structures 330 are disposed on opposite sides of a sub-pixel 10, each closest to the other. One of the two sub-defining structures 330 is rotationally symmetric with respect to the center of the light-emitting area 010 of the sub-pixel 10. For example, the two sub-defining structures 330 on either side of the long side of the light-emitting area 010 of the first color sub-pixel 101 can be symmetrically arranged relative to the centerline of the light-emitting area 010 extending along the long side, thereby enhancing the symmetry of the pixel-defining portion 230. For example, one of the two sub-defining structures 330 can be rotated 180 degrees around the center of the light-emitting area 010 to coincide with the other sub-defining structure 330. This symmetrical design can achieve a more symmetrical barrier effect in a specific direction. Furthermore, when these symmetrically arranged sub-defining structures serve to support the mask, they can improve the uniformity of the support force applied to the evaporation mask.

[0220] For example, FIG13 only illustrates the confinement structure 300 located on one side of the first color sub-pixel 101. For example, the confinement structure 300 may be provided on both sides of the first color sub-pixel 101. For example, the sub-confinement structures 330 located on both sides of the same sub-pixel 10 each have one edge covered by the pixel-defining portion 230 and the other edge exposed by the second opening 220. For example, the confinement structures 300 located on both sides of the same sub-pixel 10 may be symmetrically distributed relative to the center line of the light-emitting area 010 of the sub-pixel 10. For example, the second openings 220 located on both sides of the same sub-pixel 10 may be symmetrically distributed relative to the center of the light-emitting area 010 of the sub-pixel 10.

[0221] For example, as shown in FIG12 , the edge of the defining structure 300 is closer to the first color sub-pixel 101, such as the light-emitting region 010 of the green sub-pixel, than the edge of the second opening 220. For example, the first portion 310 of the defining structure 300 is closer to the light-emitting region 010 of the first color sub-pixel 101 than the second portion 320 of the defining structure 300. For example, the edge of the defining structure 300 is closer to the third color sub-pixel 103, such as the light-emitting region 010 of the red sub-pixel, than the edge of the second opening 220. For example, the first portion 310 of the defining structure 300 is closer to the light-emitting region 010 of the third color sub-pixel 103 than the second portion 320 of the defining structure 300.

[0222] For example, as shown in Figure 12, the edge of the defining structure 300 is farther away from the second color sub-pixel 102, such as the light-emitting area 010 of the blue sub-pixel, than the edge of the second opening 220, such as the second portion 320 of the defining structure 300 is closer to the light-emitting area 010 of the second color sub-pixel 102 than the first portion 310 of the defining structure 300.

[0223] The data writing voltages of sub-pixels of different colors are different, resulting in low grayscales caused by the blue and green sub-pixels being susceptible to current leakage from the red sub-pixels when displaying images at low grayscales, such as crosstalk from the red sub-pixels to the blue or green sub-pixels. Therefore, the display substrate provided in this example can increase the channel ratio of the second electrode around the light-emitting area of ​​the blue sub-pixel by setting the limiting structure farther away from the blue sub-pixel, thereby improving the continuity of the second electrode, preventing an increase in cross-voltage, and improving display uniformity.

[0224] FIG15 is a schematic diagram of a partial planar structure of a display substrate according to another example of an embodiment of the present disclosure. The display substrate shown in FIG15 differs from the display substrate shown in FIG12 in that the relative positions of the defining structure 300, the second opening 220, and the light-emitting regions 010 of the different color sub-pixels 10 are different.

[0225] For example, as shown in FIG15 , the edge of the second opening 220 is closer to the light-emitting area 010 of the first color sub-pixel 101 than the edge of the defining structure 300, e.g., the second portion 320 of the defining structure 300 is closer to the light-emitting area 010 of the first color sub-pixel 101 than the first portion 310. For example, the edge of the second opening 220 is closer to the light-emitting area 010 of the third color sub-pixel 103 than the edge of the defining structure 300, e.g., the second portion 320 of the defining structure 300 is closer to the light-emitting area 010 of the third color sub-pixel 103 than the first portion 310.

[0226] For example, as shown in Figure 15, the limiting structure 300 located between the first color sub-pixel 101 and the third color sub-pixel 103 is closer to the light-emitting area 010 of the third color sub-pixel 103, so as to maximize the isolation effect of at least one layer of the light-emitting functional layer 130 of the third color sub-pixel 103, thereby achieving the purpose of preventing crosstalk.

[0227] Except for the positional relationship between the defining structure, the second opening, and the light-emitting areas in the display substrate shown in FIG15 , which is different from the positional relationship between the defining structure, the second opening, and the light-emitting areas shown in FIG12 , the other structures in the display substrate shown in FIG15 may have the same features as the other structures in the display substrate shown in FIG12 , and are not further described here. The shape of the defining structure in the display substrate shown in FIG15 may be the same as the shape of the defining structure in the display substrate shown in FIG12 , the shape of the second opening shown in FIG15 may be the same as the shape of the second opening in the display substrate shown in FIG12 , and the shape and distribution of the light-emitting areas shown in FIG15 may be the same as the shape and distribution of the light-emitting areas in the display substrate shown in FIG12 .

[0228] Figure 16 is a schematic diagram of a partial cross-sectional structure of a display substrate provided according to another example of an embodiment of the present disclosure. Figure 16 may be a schematic diagram of a partial cross-sectional structure taken along line BB' of the display substrate.

[0229] The difference between the display substrate shown in FIG. 16 and the display substrate shown in FIG. 12 to FIG. 14 is that the limiting structure 300 is provided on only one side of the sub-pixel 10 of the same color.

[0230] For example, as shown in Figure 16, the limiting structure 300 is only located on one side of the first opening 210 of the pixel limiting pattern 200, and the second opening 220 is only provided at the position of the limiting structure 300. For example, the limiting structure 300 can be located on one side of a specific color sub-pixel 10, such as a red sub-pixel, a green sub-pixel, or a blue sub-pixel. For example, the limiting structure 300 can be located between two specific color sub-pixels 10, such as between a green sub-pixel and a blue sub-pixel, or between a green sub-pixel and a red sub-pixel. For example, the limiting structure 300 can be provided corresponding to three color sub-pixels 10. For example, the limiting structure 300 can include a plurality of sub-limiting structures 330, and the plurality of sub-limiting structures 330 can be evenly provided or provided at a specific position in the display area. The embodiment of the present disclosure does not limit the position of the limiting structure, and it can be provided according to product requirements.

[0231] In the example of the display substrate shown in FIG16 , except for the position of the defining structure 300, which differs from the position of the defining structure 300 in the display substrate shown in FIG12 to FIG14 , the other structures in the display substrate shown in FIG16 may have the same features as the corresponding structures in the display substrate shown in FIG12 to FIG14 , and detailed description thereof is omitted. For example, the cross-section of the defining structure 300 in the display substrate shown in FIG16 may have the same features as the cross-section of the defining structure 300 in the display substrate shown in FIG12 to FIG14 , and detailed description thereof is omitted.

[0232] Figures 17 and 18 are schematic diagrams of partial cross-sectional structures of display substrates provided according to different examples of the present disclosure. Figures 17 and 18 may be schematic diagrams of partial cross-sectional structures taken along line BB' of the display substrate.

[0233] The display substrate shown in FIG. 17 differs from the display substrate shown in FIG. 12 to FIG. 14 in that the relative positional relationship between the defining structure 300 and the pixel defining pattern 200 is different, and the relative positional relationship between the defining structure 300 and the first electrode 110 is different.

[0234] In some examples, as shown in FIG17 , the defining structure 300 covers the edge of the first electrode 110. Covering the edge of the first electrode 110 with the defining structure 300 helps prevent the edge of the first electrode 110 from being exposed due to the thinness of the edge of the pixel defining portion 230 and failing to cover the first electrode 110, thereby preventing display defects.

[0235] In some examples, as shown in FIG17 , along the arrangement direction of two adjacent sub-pixels 10 of different colors, the dimension of the confining structure 300 covering the first electrode 110 is no greater than 5 microns. For example, along the extension direction of line BB' shown in the figure, the dimension of the confining structure 300 covering the first electrode 110 is no greater than 5 microns. For example, along the extension direction of line BB' shown in the figure, the dimension of the confining structure 300 covering the first electrode 110 is greater than 0. For example, along the extension direction of line BB' shown in the figure, the dimension of the confining structure 300 covering the first electrode 110 can be 1 micron, or 2 microns. Or 3 microns, etc. The dimension of the confining structure 300 covering the first electrode 110 can be any value greater than 0 and less than 5 microns, and no further enumeration is given here.

[0236] For example, as shown in FIG. 17 , the size of the first electrode 110 covered by the defining structure 300 may be a size perpendicular to the extending direction of the defining structure 300 .

[0237] In some examples, as shown in FIG17 , the second portion 320 of the defining structure 300 is at least exposed by the first opening 210. For example, the orthographic projection of the second portion 320 of the defining structure 300 on the substrate 01 is smaller than the orthographic projection of the first portion 310 of the defining structure 300 on the substrate 01. For example, the defining structure 300 only covers a portion of the edge of a single first electrode 110, such that at least a portion of the film layer within the first opening 210 is a continuous structure. The portion of the defining structure 300 exposed by the first opening 210 and the first opening 210 together define the light-emitting area 010 of the sub-pixel 10.

[0238] For example, as shown in FIG17 , the openings 201 included in the pixel defining pattern 200 in the display substrate are all first openings 210. At some locations of the first openings 210, the light-emitting functional layer 130 is continuously provided, while at other locations, at least one layer of the light-emitting functional layer 130 is disconnected. For example, the display substrate shown in FIG17 may not include the second opening 220 shown in the example of FIG12 .

[0239] Figure 17 schematically shows that the first electrode 110 is provided with a limiting structure 300 covering the edge of the first electrode 110 on both sides of the BB' line extension direction, but is not limited to this. The first electrode 110 can also be set so that one side edge of the first electrode 110 is covered by the limiting structure 300 and the other side edge of the first electrode 110 is covered by the pixel defining portion 230.

[0240] For example, as shown in FIG. 17 , along a direction perpendicular to the base substrate 01 , the first portion 310 of the defining structure 300 does not overlap with the first electrode 110 , and the second portion 320 of the defining structure 300 overlaps with the first electrode 110 .

[0241] For example, as shown in FIG17 , the edges of the first electrode 110 of one color sub-pixel 10 may be covered by the defining structure 300, while the edges of the first electrodes 110 of the other color sub-pixels 10 may be covered by the pixel defining portion 230. For example, of two adjacent sub-pixels 10 of different colors, only the first electrode 110 of one sub-pixel 10 may be covered by the defining structure 300, while the first electrode 110 of the other sub-pixel 10 may be covered by the pixel defining portion 230.

[0242] Of course, the embodiments of the present disclosure are not limited to this. The limiting structure 300 shown in Figures 12 to 15 can also be combined with the limiting structure 300 shown in Figure 17, such that the edges of the first electrode 110 at some positions are covered by the limiting structure 300, and the first electrode 110 at some positions is spaced apart from the limiting structure 300.

[0243] In the example of the display substrate shown in FIG17 , except for the position of the defining structure 300 and the pixel defining pattern 200, which differ from the position of the defining structure 300 and the pixel defining pattern 200 in the display substrate shown in FIG12 to FIG14 , the other structures in the display substrate shown in FIG17 may have the same features as the corresponding structures in the display substrate shown in FIG12 to FIG14 , and detailed description thereof is omitted. For example, the cross-section of the defining structure 300 in the display substrate shown in FIG17 may have the same features as the cross-section of the defining structure 300 in the display substrate shown in FIG12 to FIG14 , and detailed description thereof is omitted.

[0244] As shown in Figure 18, two sub-defining structures 330 can be set between two adjacent sub-pixels in the display substrate, and one of the two sub-defining structures 330 covers the edge of the first electrode 110 and is exposed by the first opening 210, similar to the sub-defining structure 330 covering the edge of the first electrode 110 and exposed by the first opening 210 shown in Figure 17.

[0245] In some examples, as shown in FIG18 , the at least one sub-defining structure 330 located between two adjacent sub-pixels includes two spaced-apart sub-defining structures 330, with the second portion 320 of one of the two sub-defining structures 330 exposed by the first opening 210, and the second portion 320 of the other of the two sub-defining structures 330 exposed by the second opening 220. By providing two sub-defining structures 330 between two adjacent sub-pixels, one of the two sub-defining structures 330 is exposed by the first opening 210 while covering the edge of the first electrode 110, while the other of the two sub-defining structures 330 is exposed by the second opening 220. This not only further improves the isolation effect of the light-emitting functional layer 130 and reduces crosstalk, but also reduces the risk of corrosion caused by the exposed edge of the first electrode 110. Of course, the disclosed embodiments are not limited to this. For example, one of the two sub-defining structures 330 may only cover the edge of the first electrode 110 without being exposed by the first opening 210, while the other of the two sub-defining structures 330 is exposed by the second opening 220.

[0246] FIG19 is a schematic diagram of a partial planar structure of a display substrate provided according to another example of an embodiment of the present disclosure. FIG20 is a schematic diagram of a partial cross-sectional structure taken along line CC' in FIG19 . The display substrate shown in FIG19 differs from the display substrate shown in FIG12 in the width of the defining structure 300 and the positional relationship between the defining structure 300 and the first electrode 110. The display substrate shown in FIG20 differs from the display substrate shown in FIG17 in the opening 201 exposing the defining structure 300.

[0247] For example, as shown in Figures 19 and 20, the defining structure 300 covers the edge of the first electrode 110, and the portion of the edge of the first electrode 110 covered by the defining structure 300 is the first portion 310 of the defining structure 300. For example, the first electrode 110 includes a portion exposed by the first opening 210, a portion covered by the pixel defining portion 230, and a portion covered by the defining structure 300. By having the defining structure 300 cover the edge of the first electrode 110, it is helpful to prevent the edge of the first electrode 110 from being exposed due to the edge of the pixel defining portion 230 being too thin to cover the first electrode 110, thereby preventing display defects.

[0248] For example, as shown in FIG. 19 and FIG. 20 , the second portion 320 of the defining structure 300 is exposed only by the second opening 220 , but not by the first opening 210 .

[0249] In the display substrates shown in the examples of Figures 19 and 20, except for the position of the defining structure 300, which differs from the positional relationship between the defining structure 300 and the first electrode 110 in the display substrates shown in Figures 12 to 14, the other structures in the display substrates shown in Figures 19 and 20 may have the same features as the corresponding structures in the display substrates shown in Figures 12 to 14, and detailed description thereof is omitted. For example, the cross-section of the defining structure 300 in the display substrates shown in Figures 19 and 20 may have the same features as the cross-section of the defining structure 300 in the display substrates shown in Figures 12 to 14, and detailed description thereof is omitted.

[0250] FIG21 is a schematic diagram of a partial cross-sectional structure of a display substrate according to another example of an embodiment of the present disclosure. The display substrate shown in FIG21 differs from the display substrate shown in FIG20 in the positional relationship between the defining structure 300 and the first opening 210.

[0251] In some examples, as shown in FIG21 , at least one sub-definition structure 330 located between two sub-pixels 10 includes a sub-definition structure 330 having one side edge exposed by the first opening 210 and another side edge exposed by the second opening 220. By exposing both side edges of the sub-definition structure 330 by the first opening 210 and the second opening 220, respectively, while the sub-definition structure 330 covers the edge of the first electrode 110, this not only further improves the isolation effect of the light-emitting functional layer 130 and further reduces crosstalk, but also reduces the risk of corrosion caused by the exposed edge of the first electrode 110.

[0252] For example, as shown in FIG21 , the sub-defining structure 330 includes two second portions 320 and a first portion 310 located between the two second portions 320. The two second portions 320 are exposed by the first opening 210 and the second opening 220, respectively. For example, the area of ​​the orthographic projection of the second portion 320 exposed by the first opening 210 on the base substrate 01 is not greater than the area of ​​the orthographic projection of the second portion 320 exposed by the second opening 220 on the base substrate 01.

[0253] In the example of the display substrate shown in FIG21 , except for the positional relationship between the defining structure 300, the pixel defining pattern 200, and the first electrode 110, which differs from the positional relationship between the defining structure 300, the pixel defining pattern 200, and the first electrode 110 in the display substrate shown in FIG12 to FIG14 , the other structures in the display substrate shown in FIG21 may have the same features as the corresponding structures in the display substrate shown in FIG12 to FIG14 , and further description thereof will not be given here. For example, the cross-section of the defining structure 300 in the display substrate shown in FIG21 may have the same features as the cross-section of the defining structure 300 in the display substrate shown in FIG12 to FIG14 , and further description thereof will not be given here.

[0254] Figure 22 is a schematic diagram of a partial planar structure of a display substrate provided according to another example of an embodiment of the present disclosure. Figure 23 is a schematic diagram of a partial cross-sectional structure taken along line DD' in Figure 22. The display substrate shown in Figure 22 differs from the display substrate shown in Figure 12 in that the shape of the confinement structure 300 surrounding the first color sub-pixel 101 is different, and the positional relationship between the confinement structure 300 surrounding the first color sub-pixel 101 and the second opening 220 is different.

[0255] For example, as shown in Figures 22 and 23, one sub-defining structure 330 is provided between adjacent first-color sub-pixels 101 and second-color sub-pixels 102, and two sub-defining structures 330 are provided between adjacent first-color sub-pixels 101 and third-color sub-pixels 103. By providing different numbers of sub-defining structures 330 between sub-pixels of different colors, the crosstalk between the first-color sub-pixel 101 and the third-color sub-pixel 103, which are prone to crosstalk, can be reduced while increasing the size of the communication channel between the second electrode 120 around the second-color sub-pixel 102, thereby improving the continuity of the second electrode 120. Of course, the embodiments of the present disclosure are not limited to this, and two sub-defining structures 330 may also be provided between the first-color sub-pixel 101 and the second-color sub-pixel 102.

[0256] In some examples, as shown in Figures 22 and 23, at least one sub-definition structure 330 located between two adjacent sub-pixels includes two spaced-apart sub-definition structures 330, with opposing edges of the two sub-definition structures 330 exposed by the same second opening 220, further improving the isolation effect of the light-emitting functional layer 130 of the two adjacent sub-pixels 10. For example, the two second portions 320 in the two sub-definition structures 330 are close to each other.

[0257] In some examples, as shown in Figures 22 and 23, the two sub-defining structures 330 are respectively two annular sub-defining structures 330 surrounding the light-emitting areas 010 of two adjacent sub-pixels of different colors. For example, the light-emitting areas 010 of the first color sub-pixel 101 and the light-emitting areas 010 of the third color sub-pixel 103 are each surrounded by two annular sub-defining structures 330, and the adjacent edges of the two annular sub-defining structures 330 are exposed by the same second opening 220. For example, there are multiple second openings 220 that expose each annular sub-defining structure 330, and the multiple second openings 220 are spaced apart from each other.

[0258] By arranging the light-emitting areas of two adjacent sub-pixels to be surrounded by the annular sub-defining structure, the uniformity of the heights of the pixel defining portions around the light-emitting areas of the two adjacent sub-pixels is improved.

[0259] Figure 22 schematically shows that the light-emitting area 010 of the first color sub-pixel 101 and the light-emitting area 010 of the third color sub-pixel 103 are both surrounded by the annular sub-defining structure 330, but is not limited to this. For example, the light-emitting area 010 of the first color sub-pixel 101 and the light-emitting area 010 of the second color sub-pixel 102 are both surrounded by the annular sub-defining structure 330, such as the light-emitting area 010 of the second color sub-pixel 102 and the light-emitting area 010 of the third color sub-pixel 103 are both surrounded by the annular sub-defining structure 330, such as the light-emitting area 010 of the first color sub-pixel 101, the light-emitting area 010 of the second color sub-pixel 102 and the light-emitting area 010 of the third color sub-pixel 103 are all surrounded by the annular sub-defining structure 330.

[0260] In the display substrates shown in the examples of Figures 22 and 23, except for the different shape of the defining structure 300 surrounding the first color sub-pixel 101 and the different positional relationship between the defining structure 300 surrounding the first color sub-pixel 101 and the second opening 220 compared to the shape of the defining structure 300 surrounding the first color sub-pixel 101 and the different positional relationship between the defining structure 300 surrounding the first color sub-pixel 101 and the second opening 220, the other structures in the display substrates shown in Figures 22 and 23 can have the same features as the corresponding structures in the display substrates shown in Figures 12 to 14, and no further description is given here. For example, the cross-section of the defining structure 300 in the display substrate shown in Figure 21 can have the same features as the cross-section of the defining structure 300 in the display substrate shown in Figures 12 to 14, and no further description is given here.

[0261] It should be noted that the display substrate in the examples shown in Figures 12 to 22 schematically shows a situation where the limiting structure and the second opening overlap with the first electrode of the sub-pixel, but the schematic diagram does not limit the overlapping relationship between the limiting structure and the second opening and the first electrode. At least one of the limiting structure and the second opening in the display substrate in the examples shown in Figures 12 to 22 may not overlap with any first electrode.

[0262] Figures 24 and 25 are schematic diagrams of partial planar structures of display substrates provided according to different examples of the present disclosure. Figure 26 is a schematic diagram of a partial cross-sectional structure taken along line EE' in Figure 24. Figure 27 is a schematic diagram of a partial cross-sectional structure taken along line FF' in Figure 25.

[0263] 24 and 25 differ from the display substrate shown in FIG12 to FIG14 in that the shape and position of the defining structure 300 and the second opening 220 are different. FIG24 and FIG25 also show spacers 400.

[0264] In some examples, as shown in Figures 24 to 27 , the display substrate further includes a spacer 400 located on a side of the pixel defining portion 230 away from the base substrate 01 , and the defining structure 300 is made of a material different from that of the spacer 400. For example, the spacer 400 (PS) is configured to support a fine metal mask (FMM Mask) when fabricating the light-emitting layer.

[0265] For example, as shown in Figures 24 to 27, the material of the defining structure 300 may include a negative photoresist, and the material of the spacer 400 may include a positive photoresist. For example, a positive photoresist is one in which the illuminated portion undergoes a degradation reaction and is dissolved by a developer, leaving the unexposed portion with a pattern that is consistent with the pattern on the mask. A negative photoresist is one in which the illuminated portion undergoes a cross-linking reaction and becomes insoluble, while the unexposed portion is dissolved by a developer, forming a pattern that is complementary to the pattern on the mask.

[0266] In some examples, as shown in Figures 24 to 27, the thickness of the spacer 400 is no greater than 5 microns, and the thickness of the pixel defining portion 230 is no greater than 5 microns. For example, the thickness of the spacer 400 is no greater than 4 microns, and the thickness of the pixel defining portion 230 is no greater than 4 microns. For example, the thickness of the pixel defining portion 230 is greater than 1 micron. For example, the thickness of the spacer 400 is greater than 1 micron. For example, along a direction perpendicular to the base substrate 01, the thickness of the portion where the pixel defining portion 230 overlaps with the defining structure 300 can be less than the thickness of the defining structure 300. For example, along a direction perpendicular to the base substrate 01, the thickness of the portion where the pixel defining portion 230 overlaps with the defining structure 300 can be 1.1 to 1.3 microns, and the thickness of the defining structure 300 can be 1.4 to 1.6 microns.

[0267] 24 and 26 , the spacers 400 do not overlap with the defining structure 300 in a direction perpendicular to the base substrate 01. For example, the thickness of the spacers 400 may be greater than that of the defining structure 300 to enable the spacers 400 to support the mask.

[0268] In some examples, as shown in Figures 25 and 27 , the orthographic projection of the spacer 400 on the base substrate 01 overlaps with the orthographic projection of the defining structure 300 on the base substrate 01. For example, the orthographic projection of the spacer 400 on the base substrate 01 completely falls within the orthographic projection of the defining structure 300 on the base substrate 01. Thus, the structure formed by the spacer 400 and the defining structure 300 is used to support the mask, which helps to improve the support effect.

[0269] In some examples, as shown in Figures 25 and 27, the defining structure 300 includes a plurality of defining portions 340 and a connecting portion 350 that connects at least part of the plurality of defining portions 340. In a direction perpendicular to the base substrate 01, the defining portion 340 overlaps with the second opening 220, and the orthographic projection of the connecting portion 350 on the base substrate 01 completely falls within the orthographic projection of the pixel defining portion 230 on the base substrate 01; the orthographic projection of the spacer 400 on the base substrate 01 completely falls within the orthographic projection of the connecting portion 350 on the base substrate 01.

[0270] For example, as shown in FIG25 , the defining portion 340 is located between adjacent first color sub-pixels 101 and second color sub-pixels 102, or between adjacent first color sub-pixels 101 and third color sub-pixels 103, and the second portion 320 of the defining portion 340 is exposed by the second opening 220. For example, the connecting portion 350 can be located between four defining portions 340 and connect the four defining portions 340. For example, the defining portions 340 and the connecting portion 350 can be an integrated structure. By configuring the defining structure to include mutually connected defining portions and connecting portions, the density of the defining structure can be increased to increase line width uniformity, and the symmetry of the defining structure can also be improved.

[0271] For example, as shown in Figures 25 and 27, the total height of the stacked defining structure 300, pixel defining portion 230, and spacer 400 is no greater than 10 microns. For example, the total height of the stacked defining structure 300, pixel defining portion 230, and spacer 400 is no greater than 9 microns, or no greater than 7 microns, or no greater than 5 microns, etc.

[0272] For example, as shown in FIG. 25 , in a direction perpendicular to the base substrate 01 , the size of the connection portion 350 overlapping the spacer 400 in the Y direction is larger than the size of the connection portion 350 not overlapping the spacer 400 in the Y direction.

[0273] For example, as shown in FIG25 , the defining structure 300 composed of four defining portions 340 and one connecting portion 350 may be a profiled defining structure 300. The defining structure 300 surrounding the first color sub-pixel 101 may include two profiled defining structures 300 spaced apart from each other, and the defining structure 300 surrounding the third color sub-pixel 103 may include two profiled defining structures 300 spaced apart from each other. For example, the profiled defining structure 300 may be curved toward the light-emitting region 010 of the first color sub-pixel 101. For example, the profiled defining structure 300 may be curved toward the light-emitting region 010 of the third color sub-pixel 103.

[0274] In some examples, as shown in Figures 24 and 25, the first electrode 110 of each sub-pixel includes a main electrode 111 and a connecting electrode 112, and the main electrode 111 is similar in shape to the light-emitting area 010 of the sub-pixel 10; the positive projection of the connecting electrode 112 of at least one sub-pixel on the base substrate 01 does not overlap with the positive projection of the limiting structure 300 and the opening 201 on the base substrate 01.

[0275] For example, as shown in Figures 24 and 25 , in a direction perpendicular to the base substrate 01, the main electrode 111 overlaps the first opening 210 of the pixel-defining pattern 200, while the connecting electrode 112 does not overlap the first opening 210 of the pixel-defining pattern 200. For example, the connecting electrode 112 is configured to electrically connect to the light-emitting control transistor in the pixel circuit. For example, the first electrode 110 of the third color sub-pixel 103, in addition to the main electrode 111 and the connecting electrode 112, also includes a light shielding portion 113 to shield certain structures in the pixel circuit from light.

[0276] For example, as shown in Figures 24 and 25, the orthographic projections of the connecting electrodes 112 of at least some of the sub-pixels 10 on the substrate substrate 01 do not overlap with the orthographic projections of the defining structure 300 and the opening 201 on the substrate substrate 01. For example, the orthographic projections of the connecting electrodes 112 of each sub-pixel 10 on the substrate substrate 01 do not overlap with the orthographic projections of the defining structure 300 and the opening 201 on the substrate substrate 01. For example, the orthographic projection of the connecting electrode 112 of at least one sub-pixel 10 on the substrate substrate 01 overlaps with the orthographic projection of at least one of the defining structure 300 and the opening 201 on the substrate substrate 01. For example, the orthographic projection of the connecting electrode 112 of at least one sub-pixel 10 on the substrate substrate 01 overlaps with at least one of the orthographic projections of the defining structure 300 and the opening 201 on the substrate substrate 01, and the overlapping size does not exceed 1 micron.

[0277] For example, as shown in Figures 24 and 25, the connection electrode 112 is configured to be electrically connected to the light emission control transistor through a via hole in the insulating layer between the connection electrode 112 and the light emission control transistor, and along a direction perpendicular to the base substrate, the defining structure 300 and the opening 201 do not overlap with the via hole in at least one sub-pixel 10. For example, along a direction perpendicular to the base substrate, the defining structure 300 and the opening 201 do not overlap with the via hole in each sub-pixel 10.

[0278] In the examples of the display substrates shown in Figures 24 and 25, except for the shape and position of the defining structure 300 and the second opening 220 being different from the shape and position of the defining structure 300 and the second opening 220 in the display substrates shown in Figures 12 to 14, the other structures in the display substrates shown in Figures 24 and 25 may have the same features as the corresponding structures in the display substrates shown in Figures 12 to 14, and further description thereof will not be repeated here. For example, the cross-section of the defining structure 300 in the display substrate shown in Figure 21 may have the same features as the cross-section of the defining structure 300 in the display substrate shown in Figures 12 to 14, and further description thereof will not be repeated here.

[0279] For example, Figures 24 and 25 schematically illustrate that one sub-definition structure 330 is disposed between two adjacent sub-pixels 10, but the present invention is not limited thereto. Two sub-definition structures 330 may also be disposed between two adjacent sub-pixels 10. For example, Figures 24 and 25 schematically illustrate that the definition structure 300 is spaced apart from the first electrode 110, but the present invention is not limited thereto. The definition structure 300 may also cover the edge of the first electrode 110. For example, Figures 24 and 25 schematically illustrate that the definition structure 300 is exposed by the second opening 220, but the present invention is not limited thereto. The definition structure 300 may also be exposed by the first opening 210.

[0280] For example, as shown in Figure 24, at least one sub-defining structure 330 has a length of L11, and the length of the second opening 220 overlapping the sub-defining structure 330 is L12, where L11 is greater than L12. Thus, the extent to which the light-emitting functional layer of a sub-pixel is blocked is determined by the size of the second opening. For example, at least one sub-defining structure 330 has a length of L10, and the length of the second opening 220 overlapping the sub-defining structure 330 is L20, where L10 is substantially equal to L20. Therefore, it is necessary to manage the uniformity of the pixel-defining pattern and the defining structure at different locations on the display substrate to ensure uniform blocking of the light-emitting functional layer. The length of the sub-defining structure 330 can be the maximum dimension of the sub-defining structure 330 along its extension direction, and the length of the second opening 220 can be the maximum dimension of the second opening 220 along its extension direction.

[0281] It should be noted that the cross-sectional views shown in Figures 12 to 27 are only schematic. For example, the surface of the pixel defining portion away from the substrate may have a flat surface at some positions and may have an arc-shaped surface at some positions. The width, height, corners and other features of the defined structure and the width, height, corners and other features of the pixel defining portion in each cross-sectional view are only schematic and do not represent specific dimensional relationships and specific morphological features.

[0282] FIG28 is a schematic diagram of a partial planar structure of a display substrate provided according to another example of an embodiment of the present disclosure. FIG29 is an enlarged partial view of the display substrate shown in FIG28 . The display substrates shown in FIG28 and FIG29 differ from the display substrate shown in FIG24 in the length relationship between the defining structure 300 and the second opening 220 overlapping therewith. Aside from the length relationship between the defining structure and the second opening overlapping therewith, the other structures of the display substrates shown in FIG28 and FIG29 may have the same features as the corresponding structures of the display substrate shown in FIG24 and will not be further described here.

[0283] For example, as shown in Figures 28 and 29, along the extension direction of the sub-defining structure 300, the length of at least one sub-defining structure 330 is L1, and the length of the second opening 220 overlapping with the sub-defining structure 330 is L2, and L1 is smaller than L2, thereby ensuring that one side edge of the sub-defining structure is completely exposed. The length of the sub-defining structure determines the extent to which the light-emitting functional layer is isolated.

[0284] FIG30 is a schematic diagram of a partial cross-sectional structure of a display substrate provided according to another embodiment of the present disclosure.

[0285] Referring to Figures 13 and 30 , the display substrate includes a base substrate 01, a plurality of sub-pixels 10 located on the base substrate 01, and a pixel-defining pattern 200. Each of at least some of the sub-pixels 10 includes a light-emitting functional layer 130, which comprises multiple film layers. The sub-pixels 10 also include a first electrode 110 and a second electrode 120 located on either side of the light-emitting functional layer 130 perpendicular to the base substrate 01 (e.g., perpendicular to the XY plane shown in Figure 12 ). The first electrode 110 is located between the light-emitting functional layer 130 and the base substrate 01. The light-emitting functional layer 130 may include a light-emitting layer for emitting light and a charge generation layer 133. The pixel-defining pattern 200 includes a plurality of first openings 210 and a plurality of second openings 220. The plurality of first openings 210 are configured to define the light-emitting regions 010 of at least some of the sub-pixels 10. At least a portion of at least one layer of the light-emitting functional layer 130 located within the first openings 210 is continuous, while at least a portion located within at least one second opening 220 is interrupted. Figures 12 and 13 schematically illustrate that the portion of the film layer in the light-emitting functional layer 130 located in the first opening 210 is continuous, while the portion located in the second opening 220 is interrupted. Each sub-pixel 10 corresponds to at least one first opening 210, and at least a portion of the light-emitting functional layer 130 of the sub-pixel 10 is located in the first opening 210 corresponding to the sub-pixel 10. The first opening 210 is configured to expose the first electrode 110.

[0286] As shown in FIG30 , the display substrate further includes a confinement structure 300 located on the base substrate 01. The confinement structure 300 is located at least between two adjacent sub-pixels 10 of different colors. The confinement structure 300 includes a first portion 310 covering the surface of the pixel defining portion 230 on the side facing away from the base substrate 01, and a second portion 320 located within the second opening 220. The second portion 320 of the confinement structure 300 is configured to block the at least one layer of the light-emitting functional layer. For example, the first portion 310 of the confinement structure 300 is located on the side of the pixel defining portion 230 facing away from the base substrate 01, and the first portion 312 of the confinement structure 300 overlaps with the pixel defining portion 230 in a direction perpendicular to the base substrate 01. For example, at least a portion of the second portion 320 of the confinement structure 300 does not overlap with the pixel defining portion 230 in a direction perpendicular to the base substrate 01. For example, at least a portion of the second portion 320 of the confinement structure 300 covers the side edges of the pixel defining portion 230. For example, along a direction perpendicular to the base substrate 01 , the second portion 320 of the defining structure 300 does not overlap with the surface of the pixel defining portion 230 on a side away from the base substrate 01 .

[0287] As shown in Figure 30 , the material of the defining structure 300 includes an organic material, and the edge of the surface of the second portion 320 of the defining structure 300 on the side away from the base substrate 01 protrudes relative to the edge of the surface on the side close to the base substrate 01. For example, the angle between the side surface of the second portion 320 of the defining structure 300 and the plane of the surface of the defining structure 300 on the side close to the base substrate 01 is greater than 20 degrees and less than 90 degrees.

[0288] The first part of the limiting structure using organic material provided by the present disclosure covers the pixel limiting part, and the second part falls into the second opening. At the same time, the edge of the surface of the second part of the limiting structure on the side away from the substrate is set to protrude relative to the edge of the surface on the side close to the substrate. This can not only isolate at least one layer of the light-emitting functional layer between sub-pixels of different colors to reduce crosstalk, but also ensure the flatness of the electrode of the sub-pixel and the normal light output effect, while minimizing the impact of the limiting structure on the process and production capacity.

[0289] In some examples, as shown in FIG30 , the edge of the surface of the first portion 310 of the defining structure 300 on the side closer to the substrate 01 protrudes relative to the edge of the surface on the side farther from the substrate 01, and the thickness of the first portion 310 of the defining structure 300 is less than the thickness of at least a portion of the second portion 320 of the defining structure 300. For example, the thickness of the first portion 310 of the defining structure 300 is less than the thickness of the portion of the second portion 320 of the defining structure 300 that does not overlap with the pixel-defining portion 230. For example, the thickness of the first portion 310 of the defining structure 300 is less than the thickness of the portion of the second portion 320 of the defining structure 200 that overlaps with the pixel-defining portion 230.

[0290] 30 , the thickness of the second portion 320 of the defining structure 300 is greater than the thickness of the pixel defining portion 230. For example, the thickness of the second portion 320 of the defining structure 300 at each position is greater than the thickness of the pixel defining portion 230. For example, the thickness of the first portion 310 of the defining structure 300 is less than the thickness of the pixel defining portion 230.

[0291] 30 , the dimension of the defining structure 300 covering the pixel defining portion 230 is no greater than 20 microns. For example, the dimension of the defining structure 300 covering the pixel defining portion 230 is no greater than 15 microns, or no greater than 14 microns, or no greater than 13 microns, or no greater than 10 microns, etc.

[0292] Except for the different positional relationship between the limiting structure and the pixel limiting portion perpendicular to the base substrate in the display substrate shown in Figure 30, other structures, such as the shapes of the sub-pixels, the first opening and the second opening, the size relationship between the limiting structure and the second opening, etc., can have the same characteristics as the corresponding structures in the display substrate shown in Figures 12 to 29, and will not be repeated here.

[0293] 31 is a schematic block diagram of a display device according to another embodiment of the present disclosure. Another embodiment of the present disclosure provides a display device, which includes any of the above-mentioned display substrates.

[0294] For example, the display device further includes a cover plate located on the light-emitting side of the display substrate.

[0295] For example, the display device can be a display device such as an organic light emitting diode display device, as well as any product or component with a display function, such as a television, digital camera, mobile phone, watch, tablet computer, laptop computer, navigator, etc. that includes the display device, but this embodiment is not limited to this.

[0296] There are a few points to note:

[0297] (1) The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures can refer to general designs.

[0298] (2) In the absence of conflict, features in the same embodiment and different embodiments of the present disclosure may be combined with each other.

[0299] The foregoing description is merely an exemplary embodiment of the present disclosure and is not intended to limit the scope of protection of the present disclosure. The scope of protection of the present disclosure is determined by the appended claims.

Claims

1. A display substrate, comprising: A substrate substrate; A plurality of sub-pixels located on the substrate substrate, the sub-pixels including a light-emitting functional layer, and the light-emitting functional layer including a plurality of film layers; A pixel defining layer, the pixel defining layer including a plurality of openings and pixel defining portions surrounding the plurality of openings, the plurality of openings including a plurality of first openings and a plurality of second openings, the first openings being configured to define a light-emitting region of the sub-pixels, at least one layer of the light-emitting functional layer being at least partially continuous in at least some of the first openings and at least partially interrupted in at least some of the second openings; At least one first defining structure, the first defining structure including a first portion overlapping with the pixel defining portion and a second portion exposed by the second opening, the second portion of the first defining structure being configured to interrupt at least one layer of the light-emitting functional layer; Wherein, the display substrate further includes at least one support structure, a minimum distance between a positive projection of the support structure on the substrate substrate and a positive projection of the first defining structure on the substrate substrate is a first distance, and a minimum distance between a positive projection of the support structure on the substrate substrate and a positive projection of the second opening on the substrate substrate is a second distance, both the first distance and the second distance are greater than 0 micrometers and less than 10 micrometers.

2. The display substrate according to claim 1, wherein, Both the first distance and the second distance are not less than 2 micrometers.

3. The display substrate according to claim 1 or 2, wherein A straight-line distance between any two points on an edge of a cross-section of the support structure intercepted by a plane parallel to the substrate substrate is not greater than 20 micrometers.

4. The display substrate according to any one of claims 1-3, wherein, At least a part of a surface of the support structure away from the substrate substrate is farther from the substrate substrate than the pixel defining portion, and a cross-section of the support structure intercepted by a plane parallel to the substrate substrate is circular, elliptical or polygonal.

5. The display substrate according to any one of claims 1-4, wherein, In a direction perpendicular to the substrate substrate, a size of the support structure is not greater than 10 micrometers.

6. The display substrate according to claim 1, wherein, The first portion of the first defining structure covers the pixel defining portion. At least a part of a side surface of the first portion of the first defining structure away from its second portion and a first surface of the first portion close to the substrate substrate have a slope angle, and an angle between at least a part of the side surface and a part of the first surface close to the second portion is less than 90 degrees.

7. The display substrate according to claim 6, wherein, In an arrangement direction of adjacent sub-pixels, a maximum size of a cross-section of the first defining structure located between the adjacent sub-pixels intercepted by a plane is a first size, and a maximum size of a cross-section of the first portion of the first defining structure intercepted by the plane is a second size, the second size is not less than 1 / 2 of the first size and not greater than 10 micrometers, the plane is parallel to the arrangement direction of the adjacent sub-pixels, and the plane is perpendicular to the substrate substrate.

8. The display substrate according to any one of claims 1-7, wherein, The plurality of sub-pixels include a plurality of first sub-pixels, a plurality of second sub-pixels and a plurality of third sub-pixels, and the first sub-pixels, the second sub-pixels and the third sub-pixels form a repeating unit. The first sub-pixel and the second sub-pixel in the repeating unit are arranged in sequence in a first arrangement direction. The first sub-pixel and the second sub-pixel are located on one side of the third sub-pixel in a second arrangement direction. The first arrangement direction intersects with the second arrangement direction.

9. The display substrate according to claim 8, wherein, One of the first defining structures and one of the second openings are provided between any two adjacent sub-pixels among the first sub-pixel, the second sub-pixel, and the third sub-pixel. The distances between the light-emitting regions of adjacent sub-pixels and the second opening located between adjacent sub-pixels are not equal. The second part of the first defining structure is located between its first part and the light-emitting region of the sub-pixel adjacent to the second opening among the adjacent sub-pixels.

10. The display substrate according to claim 8 or 9, wherein, The length of the edge of the first defining structure close to the first opening of the sub-pixel is less than the length of the edge of the second opening close to the first opening of the sub-pixel. Both ends of the second opening in its extending direction are located on both sides of both ends of the first defining structure overlapping therewith.

11. The display substrate according to any one of claims 1-7, wherein, The plurality of sub-pixels include a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels. The plurality of sub-pixels are arranged as a plurality of first sub-pixel groups and a plurality of second sub-pixel groups alternately arranged in a first arrangement direction. The first sub-pixel group includes the first sub-pixel and the second sub-pixel alternately arranged in a second arrangement direction. The second sub-pixel group includes the third sub-pixel arranged in the second arrangement direction. The first arrangement direction intersects with the second arrangement direction. The first sub-pixel group and the second sub-pixel group are staggeredly distributed in the second arrangement direction, and each first sub-pixel in at least part of the first sub-pixels is surrounded by eight sub-pixels. The eight sub-pixels include the second sub-pixels and the third sub-pixels alternately arranged.

12. The display substrate according to any one of claims 1-11, wherein, The display substrate includes: A first region configured to perform display, and at least part of the plurality of sub-pixels are located in the first region. A second region, and the first region is located on at least one side of the second region. A third region located between the first region and the second region. Wherein, the display substrate includes at least one second defining structure located in the third region. The orthographic projection of the second defining structure on the substrate is annular and surrounds the second region. The material of the second defining structure is the same as that of the first defining structure. At least one layer of the light-emitting functional layer is blocked by the edge portion of the second defining structure that does not overlap with the pixel defining portion.

13. The display substrate according to claim 12, wherein, The plurality of openings in the pixel defining layer include a third opening. The third opening is located in the third region and is configured to expose at least part of the second defining structure. Wherein, the at least one second defining structure includes at least one of a first sub-defining structure and a second sub-defining structure, the first sub-defining structure is completely exposed by the third opening, the second sub-defining structure includes a third portion overlapping with the pixel defining portion and a fourth portion exposed by the third opening, and the fourth portion of the second sub-defining structure is configured to isolate at least one layer of the light-emitting functional layer.

14. The display substrate according to claim 12 further comprises: A third defining structure, wherein the third defining structure is located in the third region, and the third defining structure is located between the second defining structure and the second region, the pixel defining portion is located on a side of the third defining structure away from the second region, and the third defining structure is configured to isolate at least one film layer of the light-emitting functional layer.

15. The display substrate according to claim 14, wherein, A surface edge of at least one of the first limiting structure, the second limiting structure, and the third limiting structure that is away from the substrate protrudes relative to a surface edge that is close to the substrate.

16. The display substrate according to claim 11, wherein, The first portion of the first defining structure is covered by the pixel defining portion, The area of ​​the light-emitting area of ​​the third sub-pixel is smaller than the area of ​​the light-emitting area of ​​the second sub-pixel, and the distance between the second opening located between the second sub-pixel and the third sub-pixel and the light-emitting area of ​​the third sub-pixel is not less than the distance between the second opening and the light-emitting area of ​​the second sub-pixel.

17. The display substrate according to claim 16, wherein, In the arrangement direction of adjacent sub-pixels, the maximum size of a cross section of the first limiting structure located between the adjacent sub-pixels cut by a plane is a first size, and the maximum size of a cross section of the first part of the first limiting structure cut by the plane is a second size, the second size is not less than 1 / 2 of the first size, the plane is parallel to the arrangement direction of the adjacent sub-pixels, and the plane is perpendicular to the substrate.

18. The display substrate according to claim 16 or 17, wherein, The length of the second opening in the extending direction thereof is not equal to the length of the first limiting structure in the extending direction thereof.

19. The display substrate according to claim 16 or 17, wherein The length of the second opening in its extending direction is equal to the length of the first limiting structure in its extending direction, and the first distance is not equal to the second distance.

20. The display substrate according to any one of claims 16-19, wherein, The maximum dimension of a cross section of the second opening cut by the plane in the arrangement direction of the adjacent sub-pixels is no greater than 10 micrometers.

21. The display substrate according to any one of claims 16-20, wherein, The length of the second opening in the extending direction thereof is no more than 50 micrometers.

22. The display substrate according to any one of claims 16-21, wherein, The distance between the first limiting structure and the first electrode of the sub-pixel is no greater than 15 micrometers.

23. The display substrate according to any one of claims 16-22, wherein, The length of the edge of the first limiting structure close to the light emitting area of ​​the sub-pixel is no more than 50 micrometers.

24. The display substrate according to any one of claims 16-23, wherein, The plurality of sub-pixels are arranged into a plurality of sub-pixel rows and a plurality of sub-pixel columns, In a direction parallel to the substrate, a distance between adjacent first defining structures between two adjacent sub-pixel rows is no greater than 40 micrometers, and a distance between adjacent first defining structures between two adjacent sub-pixel columns is no greater than 40 micrometers.

25. A display panel comprising the display substrate according to any one of claims 1 to 24.

26. A display device comprising the display substrate according to any one of claims 1 to 24.

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