Display substrate and display apparatus

Abstract

A display substrate and a display apparatus. The display substrate comprises a base substrate, sub-pixels located on the base substrate, and a limiting structure. The sub-pixel comprises a light-emitting functional layer, which comprises a plurality of film layers; and the limiting structure is located between two adjacent sub-pixels of different colors and is configured to partition at least one layer of the light-emitting functional layer. The sub-pixels comprise sub-pixels of a first color, and the limiting structure adjacent to the sub-pixels of the first color in the limiting structure is a first limiting structure; a light-emitting area of the sub-pixels of the first color comprises a first edge extending in a first direction; the first limiting structure comprises two limiting end points, wherein in the first direction, at least one limiting end point protrudes relative to an edge end point of the first edge, or the first limiting structure has a curved shape; and the total length of the first limiting structure is greater than the size of the light-emitting area of the sub-pixels of the first color in at least one direction, so that the low-grayscale crosstalk problem caused by leakage current between the sub-pixels of the first color and sub-pixels of other colors is mitigated.

Description

Display substrate and display device Technical Field

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

[0002] With the development of display technology, users have increasingly higher requirements for the power consumption and service life of display devices. An organic light-emitting display device with a tandem structure improves the lifespan and brightness of the light-emitting device while reducing power consumption by adding at least one light-emitting layer and a charge-generating layer to the organic light-emitting device, thereby meeting user requirements for power consumption and service life of the display device.

[0003] Summary of the Invention

[0004] The present disclosure provides a display substrate and a display device.

[0005] The embodiment of the present disclosure provides a display substrate, comprising a base substrate and a plurality of sub-pixels and a plurality of defining structures located on the base substrate. 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 plurality of defining structures are located between at least two adjacent sub-pixels of different colors, and are configured to isolate at least one layer of the light-emitting functional layer. The plurality of sub-pixels include a plurality of first-color sub-pixels, and the defining structure adjacent to at least one first-color sub-pixel among the plurality of defining structures is a first defining structure; at least a portion of the first defining structure extends along a first direction, and the light-emitting area of ​​the first-color sub-pixel includes a first edge extending along the first direction, and the first defining structure includes two defining endpoints, and in the first direction, at least one defining endpoint protrudes relative to an edge endpoint of the first edge adjacent to the at least one defining endpoint, or the first defining structure has a curved shape, and the total length of the first defining structure is greater than the size of the light-emitting area of ​​the first-color sub-pixel in at least one direction.

[0006] For example, according to an embodiment of the present disclosure, the distance between the two defined end points of the first defining structure is greater than the length of the first edge.

[0007] For example, according to an embodiment of the present disclosure, the total length of the portion of the first limiting structure extending along the first direction is greater than the length of the first edge.

[0008] For example, according to an embodiment of the present disclosure, the shape of a cross-section of the defining structure cut by a plane perpendicular to its extension direction includes an inverted trapezoid, the base angle between the waist of the inverted trapezoid and its bottom edge away from the substrate is 50 to 80 degrees, the length of the bottom edge of the inverted trapezoid close to the substrate is 1 to 6 microns, and the thickness of the defining structure is 0.8 to 1.8 microns.

[0009] For example, according to an embodiment of the present disclosure, the orthographic projection of the first edge on the substrate is a first orthographic projection, the orthographic projection of the first limiting structure on the substrate is a second orthographic projection, and the orthographic projection of the first orthographic projection on the straight line extending along the first direction is completely located within the orthographic projection of the second orthographic projection on the straight line.

[0010] For example, according to an embodiment of the present disclosure, the light-emitting area of ​​the first color sub-pixel also includes a second edge extending along a second direction, and the second direction intersects with the first direction; the distance between the straight line extending along the second direction where the orthographic projection of one of the two limiting endpoints on the substrate is located and the orthographic projection of the second edge on the substrate is less than 0.5 microns.

[0011] For example, according to an embodiment of the present disclosure, the multiple sub-pixels include multiple pixel units, and the multiple pixel units are arranged in an array along the first direction and the second direction, and the second direction intersects with the first direction; each pixel unit includes a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, and the first color sub-pixel and the second color sub-pixel are arranged along the second direction, and the second color sub-pixel and the third color sub-pixel are arranged along the first direction; the same first color sub-pixel is provided with the first limiting structure adjacent to it on at least one side in the second direction.

[0012] For example, according to an embodiment of the present disclosure, the first color sub-pixel is a blue sub-pixel, one of the second color sub-pixel and the third color sub-pixel is a red sub-pixel, and the other is a green sub-pixel.

[0013] For example, according to an embodiment of the present disclosure, the first defining structure is located between the first color sub-pixel and the second color sub-pixel, and the first distance between the first defining structure and the light-emitting area of ​​the second color sub-pixel is smaller than the second distance between the first defining structure and the light-emitting area of ​​the first color sub-pixel.

[0014] For example, according to an embodiment of the present disclosure, the difference between the second distance and the first distance is not less than 1 micron.

[0015] For example, according to an embodiment of the present disclosure, the first defining structure is located between the first color sub-pixel and the second color sub-pixel, and the ratio of the distance between the first defining structure and the light-emitting area of ​​the second color sub-pixel to the distance between the first defining structure and the light-emitting area of ​​the first color sub-pixel is 0.9 to 1.1.

[0016] For example, according to an embodiment of the present disclosure, at least one first limiting structure includes two sub-limiting structures arranged at intervals along the first direction, and a straight line extending along the second direction passes through the interval between the orthographic projections of the two sub-limiting structures on the substrate and the interval between the orthographic projections of the light-emitting areas of the second color sub-pixel and the third color sub-pixel on the substrate.

[0017] For example, according to an embodiment of the present disclosure, at least one first limiting structure includes two sub-limiting structures arranged at intervals along the first direction, and a straight line extending along the second direction passes through the interval between the orthographic projections of the two sub-limiting structures on the substrate and the orthographic projection of the light-emitting area of ​​the third color sub-pixel on the substrate.

[0018] For example, according to an embodiment of the present disclosure, the plurality of defining structures further include a plurality of second defining structures, which are located at least between adjacent second-color sub-pixels and third-color sub-pixels.

[0019] For example, according to an embodiment of the present disclosure, a third distance between the second defining structure and the light-emitting area of ​​the second color sub-pixel is smaller than a fourth distance between the second defining structure and the light-emitting area of ​​the third color sub-pixel.

[0020] For example, according to an embodiment of the present disclosure, a ratio of a distance between the second defining structure and the light-emitting area of ​​the second color sub-pixel to a distance between the second defining structure and the light-emitting area of ​​the third color sub-pixel is 0.9 to 1.1.

[0021] For example, according to an embodiment of the present disclosure, the display substrate further includes: a pixel defining pattern located on the base substrate, the pixel defining pattern including a plurality of openings and a pixel defining portion surrounding the plurality of openings, the plurality of openings being configured to define the light-emitting areas of at least some of the sub-pixels; a plurality of spacers located on a side of the pixel defining portion away from the base substrate, the distance between the light-emitting areas of adjacent sub-pixels being 10 to 30 microns, the plurality of defining structures being arranged in the same layer and made of the same material as the plurality of spacers, and the height of at least some of the spacers being greater than the height of the plurality of defining structures.

[0022] For example, according to an embodiment of the present disclosure, the multiple sub-pixels include multiple second-color sub-pixels and multiple third-color 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 third direction, each first sub-pixel group includes the first color sub-pixels and the second color sub-pixels alternately arranged along a fourth direction, and each second sub-pixel group includes the third color sub-pixels arranged along the fourth direction, the third direction intersects with the fourth direction and the third direction and the fourth direction both intersect with the first direction; the first limiting structure is located between the first color sub-pixel and the third color sub-pixel, and the distance between the first limiting structure and the light-emitting area of ​​the first color sub-pixel is greater than the distance between the first limiting structure and the light-emitting area of ​​the third color sub-pixel.

[0023] For example, according to an embodiment of the present disclosure, the edge of the third color sub-pixel adjacent to the first defining structure extends along the first direction.

[0024] For example, according to an embodiment of the present disclosure, the edge of the light-emitting area of ​​the third color sub-pixel has a curved shape, and the first defining structure is curved toward the light-emitting area of ​​the third color sub-pixel.

[0025] For example, according to an embodiment of the present disclosure, the multiple defining structures also include multiple second defining structures, which are located at least between adjacent second-color sub-pixels and the third-color sub-pixels, and the distance between the second defining structure and the light-emitting area of ​​the second color sub-pixel is smaller than the distance between the second defining structure and the light-emitting area of ​​the third color sub-pixel.

[0026] An embodiment of the present disclosure provides a display device, comprising any of the above-mentioned display substrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] 1 and 2 are schematic diagrams of partial stacking structures of two different display substrates.

[0029] FIG3 is a schematic diagram of a partial planar structure of a display substrate provided according to an example of an embodiment of the present disclosure.

[0030] FIG4 is a schematic diagram of a partial cross-section structure taken along line AA′ shown in FIG3 .

[0031] FIG5 is an enlarged view of the pixel unit shown in FIG3 .

[0032] FIG6 is a schematic diagram of a cross section of the first limiting structure 210 shown in FIG4 under a focused ion beam (FIB) microscope.

[0033] FIG7 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.

[0034] FIG8 is a schematic diagram of a planar structure of a pixel unit shown in FIG7 .

[0035] FIG9 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.

[0036] FIG10 is a schematic diagram of a planar structure of a pixel unit shown in FIG9 .

[0037] FIG11 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.

[0038] FIG12 is a schematic diagram of a planar structure of a pixel unit shown in FIG11 .

[0039] FIG13 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.

[0040] FIG14 is a schematic diagram of a planar structure of a pixel unit shown in FIG13 .

[0041] 15A and 15B are schematic diagrams of a planar structure of a pixel unit provided according to different examples of an embodiment of the present disclosure.

[0042] FIG16 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.

[0043] FIG. 17 is an enlarged view of a region B in the display substrate shown in FIG. 16 .

[0044] FIG18 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.

[0045] FIG19 is a schematic block diagram of a display device according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] 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.

[0047] Unless otherwise defined, technical or scientific terms used in this disclosure should have the ordinary meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "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 words "include" or "comprising" and similar terms mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0048] The features such as “parallel”, “perpendicular” and “same” used in the embodiments of the present disclosure include the features such as “parallel”, “perpendicular” and “same” in the strict sense, as well as the cases where “approximately parallel”, “approximately perpendicular” and “approximately the same” contain certain errors, taking into account the errors associated with the measurement and the measurement of specific quantities (for example, the limitations of the measurement system), and are expressed as being within 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 value. When the number of a component is not specifically indicated below in the embodiments of the present disclosure, it means that the component can be one or more, or can be understood as at least one. “At least one” refers to one or more, and “a plurality” refers to at least two.

[0049] 1 and 2 are schematic diagrams of partial stacking structures of two different display substrates.

[0050] As shown in Figure 1, the display substrate includes three light-emitting layers (EML1, EML2, and EML3) of different colors. A hole transport layer (HTL) is provided on one side of the light-emitting layer, and a hole blocking layer (HBL), an electron transport layer (ETL), and a cathode (C0) are provided on the other side of the light-emitting layer. For example, the hole transport layer (HTL), the hole blocking layer (HBL), the electron transport layer (ETL), and the cathode (C0) can all be integral layers.

[0051] As shown in FIG2 , the light-emitting functional layer in the display substrate includes a plurality of stacked light-emitting layers, such as stacked light-emitting layers EML1-1 and EML1-2, stacked light-emitting layers EML2-1 and EML2-2, and stacked light-emitting layers EML3-1 and EML3-2. For example, light-emitting layers EML1-1 and EML1-2 may be light-emitting layers of the same color or of different colors; light-emitting layers EML2-1 and EML2-2 may be light-emitting layers of the same color or of different colors; and light-emitting layers EML3-1 and EML3-2 may be light-emitting layers of the same color or of different colors. For example, light-emitting layers EML1-1, EML2-1, and EML3-1 may be light-emitting layers of different colors, and light-emitting layers EML1-2, EML2-2, and EML3-2 may be light-emitting layers of different colors.

[0052] As shown in Figure 2, a full charge generation layer, such as a P-type doped charge generation layer (P-CGL) and an N-type doped charge generation layer (N-CGL), is disposed between the stacked light-emitting layers. These two layers can serve as a common layer for the light-emitting functional layer. Both the P-type doped charge generation layer (P-CGL) and the N-type doped charge generation layer (N-CGL) are full-layer films. The charge generation layer has strong conductivity, which can contribute to the advantages of a long lifespan, low power consumption, and high brightness for the light-emitting functional layer.

[0053] The above-mentioned device having a stacked light-emitting layer and a charge generation layer can be called a tandem device. Compared with the display substrate shown in Figure 1 in which no tandem device is provided, the tandem device included in the display substrate shown in Figure 2 uses N / P-CGL as a heterojunction to connect the two light-emitting layers in series. This technology realizes the series connection of dual light-emitting devices. Under the same light-emitting intensity, the light-emitting current of the light-emitting device is greatly reduced, the life of the organic light-emitting element is improved, and the power consumption is reduced.

[0054] As shown in Figure 2, a hole blocking layer HBL can be disposed between the charge generation layer N-CGL and the light-emitting layer, a hole transport layer HTL can be disposed between the charge generation layer P-CGL and the light-emitting layer, a hole transport layer HTL can be disposed on the side of the light-emitting layer EML1-1 away from the hole blocking layer HBL, and a hole blocking layer HBL, an electron transport layer ETL, and a cathode C0 can be disposed in that order on the side of the light-emitting layer EML1-2 away from the hole transport layer HTL. For example, the hole transport layer HTL, the hole blocking layer HBL, the electron transport layer ETL, and the cathode C0 can all be integral layers.

[0055] During the research, the inventors of this application discovered that the charge generation layer of two adjacent sub-pixels in the Tandem device is a continuous film layer, and there is a lateral charge migration phenomenon, which causes the display substrate to have a monochrome chromaticity shift phenomenon at low grayscale, such as easily causing crosstalk between adjacent sub-pixels, resulting in color deviation of the display substrate.

[0056] The present disclosure provides a display substrate and a display device. The display substrate includes a base substrate, a plurality of sub-pixels located on the base substrate, and a plurality of defining structures. 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 plurality of defining structures are located between at least two adjacent sub-pixels of different colors, and are configured to isolate at least one layer of the light-emitting functional layer. The plurality of sub-pixels include a plurality of first-color sub-pixels, and the defining structure adjacent to at least one first-color sub-pixel in the plurality of defining structures is a first defining structure; at least a portion of the first defining structure extends along a first direction, and the light-emitting area of ​​the first color sub-pixel includes a first edge extending along the first direction, and the first defining structure includes two defining endpoints, and in the first direction, at least one defining endpoint protrudes relative to an edge endpoint of the first edge adjacent to at least one defining endpoint, or the first defining structure has a curved shape, and the total length of the first defining structure is greater than the size of the light-emitting area of ​​the first color sub-pixel in at least one direction.

[0057] The display substrate provided by the embodiment of the present disclosure, by setting a first limiting structure to isolate at least one layer of the light-emitting functional layer, sets the limiting endpoint of the first limiting structure to protrude relative to the edge endpoint of the first edge, or sets the total length of the first limiting structure to be larger than the size of the light-emitting area of ​​the first color sub-pixel in at least one direction, which is beneficial to reducing the low grayscale crosstalk problem caused by leakage current between the first color sub-pixel and other color sub-pixels, and reducing the possibility of peeling of the first limiting structure.

[0058] The display substrate and the display device provided by the embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0059] Fig. 3 is a schematic diagram of a partial planar structure of a display substrate provided according to an example of an embodiment of the present disclosure. Fig. 4 is a schematic diagram of a partial cross-sectional structure taken along line AA' shown in Fig. 3 .

[0060] As shown in Figures 3 and 4, the display substrate includes a base substrate 01, a plurality of sub-pixels 100 located on the base substrate 01, and a plurality of defining structures 200. Each of at least some of the sub-pixels 100 includes a light-emitting functional layer 130, which comprises multiple film layers. For example, at least some of the sub-pixels 100 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.

[0061] For example, as shown in Figure 4, the sub-pixel 100 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 (Z direction as shown in Figure 4), and the first electrode 110 is located between the light-emitting functional layer 130 and the base substrate 01.

[0062] For example, as shown in FIG4 , 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 FIG2 are only for the purpose of clearly illustrating the film layers and do not represent actual sizes.

[0063] For example, as shown in FIG4 , 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 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. The light-emitting functional layer 130 of each sub-pixel 100 can also include only one light-emitting layer.

[0064] For example, in the same sub-pixel 100, 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 100 that emits light of different colors emits light of different colors. For example, the second light-emitting layer 132 in the sub-pixel 100 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 100, 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 100, the light emitted by the multiple light-emitting layers included in the sub-pixel 100 can be mixed into white light, and the color of the light emitted from each sub-pixel 100 can be adjusted by providing a color filter layer.

[0065] For example, in each sub-pixel 100 , 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).

[0066] For example, the hole injection layer, the hole transport layer, the electron transport layer, the electron injection layer, the charge generation layer 133 and the second electrode 120 are all common layers of the plurality of sub-pixels 100 and can be referred to as common layers.

[0067] For example, the second light-emitting layer 132 may be located between the first light-emitting layer 131 and the second electrode 120, and the hole injection layer may be located between the first electrode 110 and the first light-emitting layer 131. For example, an electron transport layer may be located between the charge generation layer 133 and the first light-emitting layer 131. For example, a hole transport layer may be located between the second light-emitting layer 132 and the charge generation layer 133. For example, an electron transport layer and an electron injection layer may be located between the second light-emitting layer 132 and the second electrode 120.

[0068] For example, the charge generation layer 133 may include an N-type charge generation layer and a P-type charge generation layer.

[0069] 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.

[0070] For example, the material of the charge generation layer 133 may be a material containing a phosphorus-oxygen group or a material containing triazine.

[0071] 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 .

[0072] 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.

[0073] For example, as shown in Figure 4, 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 100, such as a planarization layer, a passivation layer, a buffer layer, a gate insulating layer, an interlayer insulating layer, etc.

[0074] As shown in Figures 3 and 4, a plurality of confining structures 200 are located between at least two adjacent sub-pixels 100 of different colors, and are configured to isolate at least one layer of the light-emitting functional layer 130. For example, at least one film layer in the light-emitting functional layer 130 that is disconnected at the edge of the confining structure 200 can be at least one film layer in the above-mentioned common layer. For example, all film layers of the light-emitting functional layer 130 and the second electrode 120 are disconnected by the confining structure 200. By disconnecting at least one film layer in the above-mentioned common layer at the edge of the confining structure 200 located between two adjacent sub-pixels 100 of different colors, the probability of crosstalk between adjacent sub-pixels 100 can be reduced. For example, the above-mentioned common layer and the second electrode 120 can be film layers formed using an open mask with an opening 310.

[0075] As shown in Figures 3 and 4, the plurality of sub-pixels 100 includes a plurality of first-color sub-pixels 101, and the plurality of confining structures 200 that is immediately adjacent to at least one of the first-color sub-pixels 101 is a first confining structure 210. For example, the confining structures 200 that are immediately adjacent to each of the first-color sub-pixels 101 are all first confining structures 210. The confining structure 200 that is immediately adjacent to the first-color sub-pixel 101 being a first confining structure 210 may mean that the distance between the first confining structure 210 and the light-emitting area 10 of the first-color sub-pixel 101 is the shortest, for example, there is no other confining structure 200 between the first confining structure 210 and the light-emitting area 10 of the first-color sub-pixel 101, and the distance between the other confining structures 200 and the light-emitting area 10 of the first-color sub-pixel 101 is greater than the distance between the first confining structure 210 and the light-emitting area 10 of the first-color sub-pixel 101.

[0076] As shown in Figure 3 , at least a portion of first confining structure 210 extends along a first direction. First confining structure 210 includes two defined endpoints 211. While Figure 3 schematically illustrates the first direction as the X-direction, this is not limiting. The first direction may also be a direction opposite to the direction indicated by the arrow in the X-direction. For example, the two defined endpoints 211 of first confining structure 210 may be points on either end of first confining structure 210 in the first direction, such as the two points on the ends that are farthest apart.

[0077] As shown in FIG3 , the light-emitting area 10 of the first color sub-pixel 101 includes a first edge 11 extending along a first direction. In the first direction, at least one defining endpoint 211 protrudes relative to an edge endpoint 111 of the first edge 11 that is immediately adjacent to the at least one defining endpoint 211. For example, a straight line extending in a direction perpendicular to the first direction (the Y direction as shown in FIG3 , or a direction opposite to the Y-direction arrow) passes through the orthographic projection of the at least one defining endpoint 211 on the substrate 01, but does not pass through the orthographic projection of the first edge 11 on the substrate 01. For example, a straight line extending in a direction perpendicular to the first direction passes through the orthographic projection of the edge endpoint 111 of the first edge 11 on the substrate 01, and also passes through the orthographic projection of the first defining structure 210 on the substrate 01.

[0078] The display substrate provided by the embodiment of the present disclosure, by setting a first limiting structure to isolate at least one layer of the light-emitting functional layer, sets the limiting end point of the first limiting structure to be protruding relative to the edge end point of the first edge, which is beneficial to reducing the low grayscale crosstalk problem caused by leakage current between the first color sub-pixel and other color sub-pixels, and reducing the possibility of peeling of the first limiting structure.

[0079] In some examples, as shown in FIG3 , the distance between the two defined endpoints 211 of the first defining structure 210 is greater than the length of the first edge 11. For example, FIG3 shows that each first defining structure 210 in the substrate includes a continuous long strip structure, and the distance between the two defined endpoints 211 of each first defining structure 210 can be the length of each first defining structure 210 in the first direction, e.g., the length of the first defining structure 210 is greater than the length of the first edge 11.

[0080] 3 , the total length of the portion of first confining structure 210 extending along the first direction is greater than the length of first edge 11. For example, first confining structure 210 extends along the first direction, and the total length of first confining structure 210 is greater than the length of first edge 11.

[0081] For example, in the display substrate shown in Figure 3, the number of first limiting structures 210 corresponding to the same first color sub-pixel 101 and located on the same side of the first color sub-pixel 101 is one, that is, a continuous long strip structure, and the total length of the first limiting structure 210 is the length of the first limiting structure 210. For example, the length of the first limiting structure 210 is greater than the length of the first edge 11.

[0082] In some examples, as shown in FIG3 , the orthographic projection of the first edge 11 on the substrate 01 is a first orthographic projection, the orthographic projection of the first confining structure 210 on the substrate 01 is a second orthographic projection, and the orthographic projection of the first orthographic projection on a straight line extending along the first direction is completely within the orthographic projection of the second orthographic projection on the straight line. For example, both of the two confining endpoints 211 of the first confining structure 210 protrude outward relative to the two edge endpoints 111 of the first edge 11. By setting the length of the first confining structure 210 to be greater than the length of the first edge 11 and setting the two confining endpoints 211 of the first confining structure 210 to protrude outward relative to the two edge endpoints 111 of the first edge 11, crosstalk between the first color sub-pixel 101 and other color sub-pixels 100 can be further reduced, thereby improving the leakage current isolation effect.

[0083] In some examples, as shown in FIG3 , the plurality of sub-pixels 100 includes a plurality of pixel units 010 , which are arranged in an array along a first direction and a second direction, where the second direction intersects the first direction. For example, the first direction is the X direction, and the second direction is the Y direction. Each pixel unit 010 includes a first-color sub-pixel 101 , a second-color sub-pixel 102 , and a third-color sub-pixel 103 . The first-color sub-pixel 101 and the second-color sub-pixel 102 are arranged along the second direction, while the second-color sub-pixel 102 and the third-color sub-pixel 103 are arranged along the first direction. For example, the sub-pixels in each pixel unit 010 are arranged in a Real RGB pixel arrangement.

[0084] 3 , a first defining structure 210 is disposed on at least one side of the same first color sub-pixel 101 in the second direction. For example, a first defining structure 210 is disposed on both sides of the same first color sub-pixel 101 in the second direction.

[0085] In some examples, as shown in FIG3 , the first color sub-pixel 101 is a blue sub-pixel, and one of the second color sub-pixel 102 and the third color sub-pixel 103 is a red sub-pixel, while the other is a green sub-pixel. For example, the second color sub-pixel 102 is a red sub-pixel, and the third color sub-pixel 103 is a green sub-pixel. Of course, the embodiments of the present disclosure are not limited to the second color sub-pixel 102 being a red sub-pixel and the third color sub-pixel 103 being a green sub-pixel. For example, the colors of the second color sub-pixel 102 and the third color sub-pixel 103 can be interchanged.

[0086] For example, as shown in FIG3 , a first confining structure 210 is provided on both sides of the same first color sub-pixel 101 in the second direction. The two first confining structures 210 located on both sides of the first color sub-pixel 101 are equidistant from the light-emitting area 10 of the first color sub-pixel 101. For example, the first confining structure 210 is located between the first color sub-pixel 101 and the second color sub-pixel 102, while also being located between the first color sub-pixel 101 and the third color sub-pixel 103. Providing the first confining structure 210 between the first color sub-pixel 101 and the second color sub-pixel 102, as well as between the first color sub-pixel 101 and the third color sub-pixel 103, facilitates improving both the leakage current blocking effect of the first confining structure 210 between the first color sub-pixel 101 and the second color sub-pixel 102, and the leakage current blocking effect of the first confining structure 210 between the first color sub-pixel 101 and the third color sub-pixel 103.

[0087] In some examples, as shown in FIG3 , the first confinement structure 210 is located between the first color sub-pixel 101 and the second color sub-pixel 102, and the ratio of the distance between the first confinement structure 210 and the light-emitting area 10 of the second color sub-pixel 102 to the distance between the first confinement structure 210 and the light-emitting area 10 of the first color sub-pixel 101 is 0.9 to 1.1. For example, the first confinement structure 210 may be flanked by the first color sub-pixel 101 and the second color sub-pixel 102, and the distance between the first confinement structure 210 and the light-emitting area 10 of the first color sub-pixel 101 is equal to the distance between the first confinement structure 210 and the light-emitting area 10 of the second color sub-pixel 102. For example, the first confinement structure 210 may be flanked by the first color sub-pixel 101 and the third color sub-pixel 103, and the distance between the first confinement structure 210 and the light-emitting area 10 of the first color sub-pixel 101 is equal to the distance between the first confinement structure 210 and the light-emitting area 10 of the third color sub-pixel 103.

[0088] In some examples, as shown in FIG3 , the light-emitting area 10 of the first color sub-pixel 101 further includes a second edge 12 extending along a second direction, where the second direction intersects the first direction, such as the Y direction shown in FIG3 , and the first direction is perpendicular to the second direction. For example, the first direction and the second direction can be interchangeable. For example, the light-emitting area 10 of the first color sub-pixel 101 can be shaped as a quadrilateral, such as a rectangle. For example, the length of the first edge 11 of the light-emitting area 10 of the first color sub-pixel 101 is greater than the length of the second edge 12.

[0089] For example, as shown in FIG3 , the extended line of the orthographic projection of the second edge 12 of the first color sub-pixel 101 on the substrate 01 passes through the orthographic projection of the first limiting structure 210 on the substrate 01. For example, the extended line of the orthographic projection of the second edge 12 of the first color sub-pixel 101 on the substrate 01 passes through the orthographic projection of the light-emitting area 10 of at least one of the second color sub-pixel 102 and the third color sub-pixel 103 on the substrate 01.

[0090] For example, as shown in FIG3 , the three sub-pixels 100 in the same pixel unit 010 are arranged in a triangle. For example, the second color sub-pixel 102 and the third color sub-pixel 103 are located in the same row, and the edges of the light-emitting areas 10 of the second color sub-pixel 102 and the third color sub-pixel 103 are both located on both sides of the first limiting structure 210 in the first direction, thereby increasing the conduction channel width of the second electrode 120.

[0091] For example, as shown in FIG3 , the first electrode 110 of each sub-pixel 100 includes a main electrode that overlaps with the light-emitting area 10 and a connecting electrode that is electrically connected to the pixel circuit. The main electrode and the connecting electrode are integrally arranged. For example, the shape of each main electrode is similar to the shape of its corresponding light-emitting area 10. For example, the connecting electrode of the first color sub-pixel 101 is located between the light-emitting areas 10 of two adjacent first color sub-pixels 101, and a straight line extending along the second direction passes through the gap between the orthographic projection of the connecting electrode of the first color sub-pixel 101 on the substrate 01 and the orthographic projection of the light-emitting areas 10 of the adjacent second color sub-pixels 102 and third color sub-pixels 103 on the substrate 01. For example, within the same pixel unit 010, the connecting electrode of the second color sub-pixel 102 is located between the light-emitting areas 10 of the first color sub-pixel 101 and the second color sub-pixel 102, and the connecting electrode of the third color sub-pixel 103 is located between the light-emitting areas 10 of the first color sub-pixel 101 and the third color sub-pixel 103.

[0092] For example, as shown in FIG3 , in a direction perpendicular to the base substrate 01, the connecting electrode of the first electrode 110 of the first color sub-pixel 101 does not overlap with the first confining structure 210, while the connecting electrode of the first electrode 110 of at least one of the second color sub-pixel 102 and the third color sub-pixel 103 overlaps with the first confining structure 210. For example, a straight line extending along the first direction passes through the orthographic projection of the first confining structure 210 on the base substrate 01 and the orthographic projection of the connecting electrode of the first color sub-pixel 101 on the base substrate 01. In a direction perpendicular to the base substrate 01, the connecting electrodes of the first electrodes 110 of the second color sub-pixel 102 and the third color sub-pixel 103 both overlap with the first confining structure 210. This ensures a small spacing between sub-pixels 100, and the provision of the first confining structure 210 reduces crosstalk between the first color sub-pixel 101 and the other color sub-pixels 100.

[0093] In some examples, as shown in FIG3 , the plurality of defining structures 200 further include a plurality of second defining structures 220, which are located at least between adjacent second-color sub-pixels 102 and third-color sub-pixels 103. For example, the second-color sub-pixels 102 and third-color sub-pixels 103 are alternately arranged along the first direction, and a second defining structure 220 extending along the second direction is disposed between any adjacent second-color sub-pixels 102 and third-color sub-pixels 103.

[0094] For example, as shown in FIG3 , the light-emitting areas 10 of the second-color sub-pixel 102 and the third-color sub-pixel 103 are both quadrilaterals, such as rectangles. For example, the area of ​​the light-emitting area 10 of the first-color sub-pixel 101 is larger than the area of ​​the light-emitting area 10 of the third-color sub-pixel 103, and the area of ​​the light-emitting area 10 of the third-color sub-pixel 103 is larger than the area of ​​the light-emitting area 10 of the second-color sub-pixel 102. For example, the length of the edge of the light-emitting area 10 of the third-color sub-pixel 103 extending along the first direction is longer than the length of the edge of the light-emitting area 10 of the second-color sub-pixel 102 extending along the first direction, and the length of the edge of the light-emitting area 10 of the third-color sub-pixel 103 extending along the second direction is equal to the length of the edge of the light-emitting area 10 of the second-color sub-pixel 102 extending along the second direction.

[0095] 3 , the ratio of the distance between the second confining structure 220 and the light-emitting area 10 of the second color sub-pixel 102 to the distance between the second confining structure 220 and the light-emitting area 10 of the third color sub-pixel 103 is 0.9 to 1.1. For example, the distance between the second confining structure 220 and the light-emitting area 10 of the second color sub-pixel 102 is equal to the distance between the second confining structure 220 and the light-emitting area 10 of the third color sub-pixel 103.

[0096] For example, as shown in FIG. 3 , the ratio of the length of the second defining structure 220 to the size of the light emitting area 10 of the second color sub-pixel 102 in the second direction is 0.8-1.2, such as 0.9-1.1, such as 1.

[0097] For example, as shown in FIG3 , a straight line extending along the second direction passes through the orthographic projection of the second confining structure 220 on the base substrate 01 and the orthographic projection of the connecting electrode of the first color sub-pixel 101 on the base substrate 01. For example, a straight line extending along the first direction passes through the first confining structure 210 but does not pass through the second confining structure 220. For example, a certain distance is provided between the first confining structure 210 and the second confining structure 220.

[0098] In some examples, as shown in Figures 3 and 4, the display substrate also includes a pixel defining pattern 300 (PDL), which is located on the base substrate 01, and the pixel defining pattern 300 includes a plurality of openings 310 and a pixel defining portion 320 surrounding the plurality of openings 310, and the plurality of openings 310 are configured to define the light-emitting area 10 of at least a portion of the sub-pixels 100.

[0099] For example, as shown in FIG3 and FIG4 , one sub-pixel 100 corresponds to at least one opening 310 , at least a portion of the light-emitting functional layer 130 of the sub-pixel 100 is located in the opening 310 corresponding to the sub-pixel 100 , and the opening 310 is configured to expose the first electrode 110 .

[0100] For example, as shown in FIG4 , when the light-emitting functional layer 130 is formed in the opening 310 of the pixel-defining pattern 300, 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 opening 310 to emit light. For example, the opening 310 of the pixel-defining pattern 300 is used to define the light-emitting region 10 of the sub-pixel 100. The light-emitting region 10 may refer to the region of the sub-pixel 100 that effectively emits light. The shape of the light-emitting region 10 refers to a two-dimensional shape. For example, the shape of the light-emitting region 10 may be the same as the shape of the opening 310 of the pixel-defining pattern 300.

[0101] For example, as shown in FIG. 4 , the material of the pixel defining portion 320 may include polyimide, acryl, polyethylene terephthalate, or the like.

[0102] FIG5 is an enlarged view of the pixel unit shown in FIG3 .

[0103] For example, as shown in FIGS. 3 and 5, the distance (such as PDL gap) between the light-emitting regions 10 of adjacent sub-pixels 100 is a, the distances between the first defining structure 210 and the light-emitting region 10 of the sub-pixel 100 are both b, the length of the side of the first defining structure 210 closer to the substrate 01 in the cross-section perpendicular to the first direction is c, the length of the first defining structure 210 is d, the length of the first edge 11 of the light-emitting region 10 of the first color sub-pixel 101 is e, the range of a is 10 to 30 microns, such as 15 to 25 microns, b = a / 2 - c, the range of c is 1 to 6 microns, and e < d. The distance between the first defining structure 210 and the light-emitting region 10 of the sub-pixel 100 can be the distance between the edges of the first defining structure 210 and the light-emitting region 10 that are close to each other.

[0104] For example, as shown in FIG. 5, the range of a is 12 to 25 microns, or 15 to 20 microns, or 18 to 28 microns, etc., and there is no limitation on this. For example, the range of c is 2 to 4 microns, or 3 to 5 microns, etc., and there is no limitation on this.

[0105] For example, as shown in FIGS. 3 and 5, the distance between the second defining structure 220 and the light-emitting region 10 of the second color sub-pixel 102 may not be greater than the distance between the first defining structure 210 and the light-emitting region 10, such as the two distances are equal, or the former is less than the latter.

[0106] FIG. 6 is a schematic diagram under a focused ion beam (FIB) microscope of the cross-section of the first defining structure 210 shown in FIG. 4.

[0107] In some examples, as shown in FIGS. 4 and 6, the shape of the cross-section of the defining structure 200, such as the first defining structure 210, intercepted by a plane perpendicular to its extending direction includes an inverted trapezoid. The base angle between the waist of the inverted trapezoid and its bottom edge 201 away from the substrate 01 is 50 to 80 degrees. The length of the bottom edge 202 of the inverted trapezoid closer to the substrate 01 is 1 to 6 microns. The thickness of the defining structure 200, such as the first defining structure 210, is 0.8 to 1.8 microns. By setting the shape of the defining structure 200, such as the first defining structure 210, the first defining structure 210 can隔断 at least one layer in the light-emitting functional layer 130.

[0108] For example, as shown in Figures 4 and 6, the base angle between the waist of the inverted trapezoid and its bottom edge 201 away from the base substrate 01 can be 55 to 70 degrees, or 60 to 75 degrees, etc., and the embodiments of the present disclosure do not list them one by one. For example, the length of the bottom edge 202 of the inverted trapezoid close to the base substrate 01 can be 2 to 4 microns, or 3 to 6 microns, or 2.5 to 5 microns, etc., and the embodiments of the present disclosure do not list them one by one. For example, the thickness of the limiting structure 200, such as the first limiting structure 210, is 1 to 1.5 microns, or 1.2 to 1.6 microns, etc., and the embodiments of the present disclosure do not list them one by one.

[0109] For example, as shown in FIG3 and FIG4 , a cross section of the second limiting structure 220 cut by a plane perpendicular to the Y direction may have the same features as the cross section of the first limiting structure 210 , which will not be described in detail herein.

[0110] The display substrate provided by the embodiment of the present disclosure helps to improve the crosstalk display defects caused by the materials in the light-emitting functional layers of different sub-pixels by limiting the relative position relationship, relative spacing, relative size, etc. between the limiting structure and sub-pixels of different colors.

[0111] 6 , an encapsulation layer 140 is further provided on the side of the second electrode 120 of the sub-pixel 100 away from the base substrate 01. For example, the encapsulation layer 140 may include an inorganic encapsulation layer, an organic encapsulation layer, and an inorganic encapsulation layer stacked in sequence.

[0112] 3 and 4 , the display substrate further includes a plurality of spacers 400 located on a side of the pixel defining portion 320 away from the base substrate 01. For example, the spacers 400 (PS) are configured to support a fine metal mask (FMM Mask) when fabricating the light emitting layer.

[0113] In some examples, as shown in Figures 3 and 4, the plurality of defining structures 200 and the plurality of spacers 400 are disposed in the same layer and made of the same material, and at least a portion of the spacers 400 are taller than the plurality of defining structures 200. For example, the defining structures 200 and the spacers 400 may be made of a negative photoresist.

[0114] For example, as shown in Figures 3 and 4, in order to reduce the production cost of the mask and simplify the production process, the limiting structure 200 used to isolate at least one layer of the light-emitting functional layer 130 and the spacer 400 used to support the FMM Mask in the embodiment of the present disclosure can be made with the same halftone mask. For example, in the material to be formed of the limiting structure 200 and the spacer 400, the position for forming the limiting structure 200 corresponds to the use of a first transmittance Tr1 in the Mask, and the position for forming the spacer 400 corresponds to the use of a second transmittance Tr2 in the Mask, and the first transmittance Tr1> the second transmittance Tr2, so that the thickness of the limiting structure 200 is less than the thickness of the spacer 400, thereby avoiding dark spots or color mixing caused by scratches on the FMM Mask caused by the limiting structure 200. For example, the difference in thickness of the limiting structure 200 and the height of the spacer 400 can be more than 0.3 microns, such as 0.4 microns, 0.5 microns or 0.6 microns, and the embodiments of the present disclosure will not be exhaustive. For example, the transmittance Tr1 can be 50%, and the transmittance Tr2 can be 0%. By placing the defining structure 200 and the spacer 400 in the same layer and using the same material, the defining structure 200 and the spacer 400 can be manufactured in a single patterning process, saving process steps. Of course, the embodiments of the present disclosure are not limited thereto. The defining structure 200 can also be made of the same material as the pixel defining portion 320, such as being an integrated structure with the pixel defining portion 320.

[0115] Figure 7 is a schematic diagram of a partial planar structure of a display substrate provided according to another example embodiment of the present disclosure. Figure 8 is a schematic diagram of the planar structure of a pixel unit shown in Figure 7. The display substrates shown in Figures 7 and 8 differ from the display substrates shown in Figures 3 and 5 in the distance between the first confining structure 210 and the first color sub-pixel 101.

[0116] In some examples, as shown in Figures 7 and 8, the first limiting structure 210 is located between the first color sub-pixel 101 and the second color sub-pixel 102, and a first distance b" between the first limiting structure 210 and the light-emitting area 10 of the second color sub-pixel 102 is less than a second distance b' between the first limiting structure 210 and the light-emitting area 10 of the first color sub-pixel 101. The data writing voltages of sub-pixels 100 of different colors are different, resulting in the blue sub-pixels and green sub-pixels being susceptible to current leakage from the red sub-pixels when displaying low grayscale images, such as crosstalk from the red sub-pixels to the blue sub-pixels or the green sub-pixels. Therefore, the display substrate provided in this example can reduce the channel ratio of the light-emitting functional layer 130 around the light-emitting area 10 of the red sub-pixel by setting the first limiting structure 210 closer to the red sub-pixel, thereby improving the crosstalk effect.

[0117] In some examples, as shown in FIG7 and FIG8 , the difference between the second distance b' and the first distance b" is not less than 1 micron. For example, the difference between the second distance b' and the first distance b" is not less than 1.2 microns, or 1.5 microns, etc., which are not exhaustive in the embodiments of the present disclosure.

[0118] For example, the parameters a, c, d, and e, as well as the relationship between d and e, shown in Figures 7 and 8 can be the same as those shown in Figure 5 and are not further described here. For example, the distance b' between the first confinement structure 210 and the light-emitting area 10 of the blue sub-pixel is at least 1 micron greater than the distance b" between the first confinement structure 210 and the light-emitting area 10 of the red or green sub-pixel.

[0119] For example, as shown in Figures 7 and 8, b", a and c satisfy the relationship 2≤b", ≤(ac) / 2, and b', a, b", and c satisfy the relationship b'=acb". For example, the value of b", can be 2 to 10 microns, and the value of b' can be 10 to 15 microns. For example, b", can be 3 microns, or 4 microns, or 5 microns, etc., and b", can be any value between 2 and 10 microns, which are not listed here. For example, b' can be 12 microns, or 14 microns, etc., and b' can be any value between 10 and 15 microns, which are not listed here.

[0120] In some examples, as shown in Figures 7 and 8, a third distance b3 between the second confinement structure 220 and the light-emitting area 10 of the second color sub-pixel 102 is less than a fourth distance b4 between the second confinement structure 220 and the light-emitting area 10 of the third color sub-pixel 103. For example, the second confinement structure 220 is closer to the second color sub-pixel 102. Thus, the display substrate provided in this example can reduce the channel ratio of the light-emitting functional layer 130 surrounding the light-emitting area 10 of the red sub-pixel by placing the first confinement structure 210 closer to the second color sub-pixel 102, such as the red sub-pixel, thereby improving crosstalk.

[0121] For example, as shown in Figure 7, the ratio of the distance between the first confinement structure 210 and the light-emitting area 10 of the second color sub-pixel 102 to the distance between the second confinement structure 220 and the light-emitting area 10 of the second color sub-pixel 102 is 0.9 to 1.1. For example, the distance between the first confinement structure 210 and the light-emitting area 10 of the second color sub-pixel 102 is equal to the distance between the second confinement structure 220 and the light-emitting area 10 of the second color sub-pixel 102. For example, the distance between the first confinement structure 210 and the light-emitting area 10 of the first color sub-pixel 101 is equal to the distance between the second confinement structure 220 and the light-emitting area 10 of the third color sub-pixel 103.

[0122] In the display substrate provided in this example, the respective features and relative positional relationships of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 are the same as the respective features and relative positional relationships of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 in the display substrate shown in Figures 3 and 5, and are not repeated here. The pixel defining pattern 300, the spacer 400, the base substrate 01, and the other film layers between the first electrode 110 and the base substrate 01 in the display substrate shown in this example may have the same features as the corresponding structures in the display substrate shown in Figures 3 to 6, and are not repeated here. The cross-sectional shape and other features of the defining structure 200 in the display substrate shown in this example are the same as the cross-sectional features of the defining structure 200 in the display substrate shown in Figures 3 to 6, and are not repeated here.

[0123] Figure 9 is a schematic diagram of a partial planar structure of a display substrate provided according to another example embodiment of the present disclosure. Figure 10 is a schematic diagram of the planar structure of a pixel unit shown in Figure 9. The display substrates shown in Figures 9 and 10 differ from the display substrates shown in Figures 7 and 8 in that at least one first confining structure 210 includes two sub-confining structures 2000 spaced apart along a first direction.

[0124] For example, as shown in Figures 9 and 10 , a first defining structure 210 located on the same side of and corresponding to a first-color sub-pixel 101 includes two sub-defining structures 2000 spaced apart along a first direction, with the distance between two mutually distant defining endpoints 211 of the two sub-defining structures 2000 being greater than the length of the first edge 11. For example, the sum of the lengths of the two sub-defining structures 2000 and the distance between the two sub-defining structures 2000 is the total length of the first defining structure 210, and the total length of the first defining structure 210 is greater than the length of the first edge 11. For example, the sum of the lengths of the two sub-defining structures 2000 is greater than the length of the first edge 11.

[0125] The display substrate provided in this example can improve the continuity of the second electrode, prevent the cross-voltage from increasing, and improve display uniformity while isolating at least one layer of the light-emitting functional layer between the second color sub-pixel and the first color sub-pixel and at least one layer of the light-emitting functional layer between the third color sub-pixel and the first color sub-pixel by setting the first limiting structure as two sub-limiting structures arranged at intervals.

[0126] In some examples, as shown in Figures 9 and 10, a straight line extending along the second direction passes through the space between the orthographic projections of the two sub-definition structures 2000 on the base substrate 01 and the space between the orthographic projections of the light-emitting areas 10 of the second-color sub-pixel 102 and the third-color sub-pixel 103 on the base substrate 01. By aligning the space between the two sub-definition structures 2000 and the space between the second-color sub-pixel 102 and the third-color sub-pixel 103, the continuity of the second electrode 120 is further improved, thereby enhancing display uniformity.

[0127] For example, a and e shown in FIG10 may be the same as the relevant parameters shown in FIG5 and are not further described here. For example, the length of one of the two sub-defining structures 2000 in the first direction is d', and the length of the other of the two sub-defining structures 2000 in the first direction is d", and d'+d">e. For example, the lengths of the two sub-defining structures 2000 may be the same or different.

[0128] For example, as shown in Figures 9 and 10, the sub-definition structure 2000 closest to the second color sub-pixel 102 of the two sub-definition structures 2000 is a first sub-definition structure 2001, and the sub-definition structure 2000 closest to the third color sub-pixel 103 of the two sub-definition structures 2000 is a second sub-definition structure 2002. The first sub-definition structure 2001 is closer to the second sub-definition structure 2002 than the light-emitting area 10 of the second color sub-pixel 102, and the second sub-definition structure 2002 is closer to the first sub-definition structure 2001 than the light-emitting area 10 of the third color sub-pixel 103. For example, the first sub-definition structure 2001 is closer to the second sub-definition structure 2002 than the first electrode 110 of the second color sub-pixel 102, and the second sub-definition structure 2002 is farther away from the first sub-definition structure 2001 than the first electrode 110 of the third color sub-pixel 103. By setting the positional relationship between the sub-defining structure 2000 and the light-emitting area 10 of the corresponding sub-pixel and the first electrode 110, the continuity of the second electrode 120 can be improved while better isolating at least one side of the light-emitting functional layer 130 between the second color sub-pixel 102 and the third color sub-pixel 103 and the first color sub-pixel 101 to reduce crosstalk.

[0129] For example, as shown in Figures 9 and 10, only one of the straight lines extending along the second direction and passing through the two second confining structures 220 located on either side of the second color sub-pixel 102 passes through the first sub-confining structure 2001. By setting the distances between the first sub-confining structure 2001, the two second confining structures 220, and the light-emitting area 10 of the second color sub-pixel 102, it is helpful to reduce the channel ratio of the light-emitting functional layer 130 around the light-emitting area 10 of the second color sub-pixel 102, such as the red sub-pixel, thereby improving the crosstalk effect.

[0130] In the display substrate provided in this example, the respective features and relative positional relationships of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 are the same as the respective features and relative positional relationships of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 in the display substrates shown in Figures 3 and 5 and Figures 7 and 8, and are not described in detail here. The pixel defining pattern 300, the spacer 400, the base substrate 01, and the other film layers between the first electrode 110 and the base substrate 01 in the display substrate shown in this example may have the same features as the corresponding structures in the display substrates shown in Figures 3 to 6, and are not described in detail here. The cross-sectional shape and other features of the defining structure 200 in the display substrate shown in this example are the same as the cross-sectional features of the defining structure 200 in the display substrate shown in Figures 3 to 6, and are not described in detail here. The display substrate shown in this example schematically shows that the distance relationship between the second limiting structure 220 and the light-emitting areas 10 of sub-pixels of different colors can be the same as the corresponding distance relationship in the display substrate shown in Figures 7 and 8, but is not limited to this. In this example, the distance relationship between the second limiting structure 220 and the light-emitting areas 10 of sub-pixels of different colors can also be the same as the corresponding distance relationship in the display substrate shown in Figures 3 to 6, which will not be repeated here.

[0131] Figure 11 is a schematic diagram of a partial planar structure of a display substrate provided in accordance with another example of an embodiment of the present disclosure. Figure 12 is a schematic diagram of the planar structure of a pixel unit shown in Figure 11. The display substrates shown in Figures 11 and 12 differ from the display substrates shown in Figures 7 and 8 in that the first defining structure 210 has a different relative positional relationship with the light-emitting area 10 of the first color sub-pixel 101 and has a different length.

[0132] In some examples, as shown in FIG11 and FIG12 , the distance between a straight line extending in the second direction on which the orthographic projection of one of the two defining endpoints 211 of the first defining structure 210 on the substrate 01 lies and the orthographic projection of the second edge 12 of the light-emitting area 10 of the first color sub-pixel 101 on the substrate 01 is less than 0.5 micrometers. For example, the distance between a straight line extending in the second direction on which the orthographic projection of one of the two defining endpoints 211 of the first defining structure 210 on the substrate 01 lies and the orthographic projection of the second edge 12 of the light-emitting area 10 of the first color sub-pixel 101 on the substrate 01 is less than 0.4 micrometers, or 0.3 micrometers, or 0.2 micrometers, or 0.1 micrometers, etc. For example, the orthographic projection of one of the two defining endpoints 211 of the first defining structure 210 on the substrate 01 and the orthographic projection of the second edge 12 of the light-emitting area 10 of the first color sub-pixel 101 on the substrate 01 are on the same straight line. For example, the orthographic projection of one of the two defining endpoints 211 of the first defining structure 210 on the substrate 01 is flush with the orthographic projection of one edge endpoint 111 of the first edge 11 of the light-emitting area 10 of the first color sub-pixel 101 on the substrate 01, and the orthographic projection of the other of the two defining endpoints 211 of the first defining structure 210 on the substrate 01 protrudes relative to the orthographic projection of the other edge endpoint 111 of the first edge 11 of the light-emitting area 10 of the first color sub-pixel 101 on the substrate 01. For example, in the same pixel unit 010, the defining endpoint 211 of the first defining structure 210 near the third color sub-pixel 103 is flush with one edge endpoint 111 of the first edge 11 of the light-emitting area 10 of the first color sub-pixel 101, and the defining endpoint 211 of the first defining structure 210 near the second color sub-pixel 102 protrudes relative to the other edge endpoint 111 of the first edge 11 of the first color sub-pixel 101.

[0133] The display substrate provided in this example can effectively reduce the crosstalk between the first color sub-pixel and the second color sub-pixel while improving the continuity of the second electrodes of the first color sub-pixel and the third color sub-pixel and improving display uniformity by limiting the positional relationship between the two limiting endpoints of the first limiting structure and the two edge endpoints of the first edge of the first color sub-pixel.

[0134] For example, the parameters a and e shown in FIG12 can be the same as those shown in FIG5 , and are not further described here. For example, the length f of the first limiting structure 210 and the length e of the first edge 11 satisfy f>e, thereby effectively isolating at least one layer of the light-emitting functional layer 130 surrounding the second color sub-pixel 102, such as the red sub-pixel, and improving the display's crosstalk effect.

[0135] For example, as shown in Figures 11 and 12, two straight lines extending along the second direction and passing through the orthographic projections of the two edge endpoints 111 of the first edge 11 of the light-emitting area 10 of the first color sub-pixel 101 on the substrate 01 both pass through the orthographic projection of the first confining structure 210 on the substrate 01. For example, two straight lines extending along the second direction and passing through the orthographic projections of the two edges of the light-emitting area 10 of the second color sub-pixel 102 extending along the second direction on the substrate 01 both pass through the orthographic projection of the first confining structure 210 on the substrate 01. For example, of the two straight lines extending along the second direction and passing through the orthographic projections of the two edges of the light-emitting area 10 of the third color sub-pixel 103 extending along the second direction on the substrate 01, only one passes through the orthographic projection of the first confining structure 210 on the substrate 01. By setting the positional relationship between the first limiting structure 210, the light-emitting area 10 of the first color sub-pixel 101, and the light-emitting area 10 of the second color sub-pixel 102, the crosstalk between the light-emitting area 10 of the first color sub-pixel 101 and the light-emitting area 10 of the second color sub-pixel 102 in the overlapping area along the second direction can be reduced while improving the continuity of the second electrode 120 in the non-overlapping area between the light-emitting area 10 of the second color sub-pixel 102 and the light-emitting area 10 of the first color sub-pixel 101 in the second direction.

[0136] In the display substrate provided in this example, the respective features and relative positional relationships of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 are the same as the respective features and relative positional relationships of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 in the display substrates shown in Figures 3 and 5 and Figures 7 and 8, and will not be repeated here. The pixel defining pattern 300, the spacer 400, the base substrate 01, and the other film layers between the first electrode 110 and the base substrate 01 in the display substrate shown in this example may have the same features as the corresponding structures in the display substrates shown in Figures 3 to 6, and will not be repeated here. The cross-sectional shape and other features of the defined structure in the display substrate shown in this example are the same as the cross-sectional features of the defined structure in the display substrates shown in Figures 3 to 6, and will not be repeated here. The display substrate shown in this example schematically shows that the distance relationship between the second limiting structure 220 and the sub-pixel light-emitting areas 10 of different colors can be the same as the corresponding distance relationship in the display substrate shown in Figures 7 and 8, but is not limited to this. In this example, the distance relationship between the second limiting structure 220 and the sub-pixel light-emitting areas 10 of different colors can also be the same as the corresponding distance relationship in the display substrate shown in Figures 3 to 6, which will not be repeated here.

[0137] Figure 13 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 14 is a schematic diagram of the planar structure of a pixel unit shown in Figure 13. The display substrates shown in Figures 13 and 14 differ from the display substrates shown in Figures 9 and 10 in that the relative positional relationship between the first confining structure 210 and the light-emitting areas 10 of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 is different.

[0138] In some examples, as shown in Figures 13 and 14, at least one first defining structure 210 includes two sub-defining structures 2000 arranged at intervals along the first direction, and a straight line extending along the second direction passes through the interval between the orthographic projections of the two sub-defining structures 2000 on the substrate substrate 01 and the orthographic projection of the light-emitting area 10 of the third color sub-pixel 103 on the substrate substrate 01.

[0139] For example, as shown in Figures 13 and 14, first defining structure 210 includes a first sub-defining structure 2001 corresponding to second color sub-pixel 102 and a second sub-defining structure 2002 corresponding to third color sub-pixel 103. The length of first sub-defining structure 2001 is greater than the length of second sub-defining structure 2002. For example, the length of first sub-defining structure 2001, second sub-defining structure 2002, and the spacing therebetween in the first direction is greater than the length of first edge 11 of light-emitting area 10 of first color sub-pixel 101. For example, one defining end 211 of first sub-defining structure 2001, which is distal to second sub-defining structure 2002, protrudes relative to one edge end 111 of first edge 11, and one defining end 211 of second sub-defining structure 2002, which is distal to first sub-defining structure 2001, protrudes relative to another edge end 111 of first edge 11.

[0140] For example, as shown in Figures 13 and 14, the straight line extending along the second direction passes through the interval between the orthographic projections of the first sub-defining structure 2001 and the second sub-defining structure 2002 on the substrate 01 and the orthographic projection of the light-emitting area 10 of the first color sub-pixel 101 on the substrate 01.

[0141] For example, as shown in Figures 13 and 14, two straight lines extending along the second direction respectively pass through two edges of the light-emitting area 10 of the second-color sub-pixel 102 extending along the second direction and the first sub-defining structure 2001. For example, one straight line extending along the second direction passes through one edge of the light-emitting area 10 of the third-color sub-pixel 103 extending along the second direction and the first sub-defining structure 2001, and another straight line extending along the second direction passes through another edge of the light-emitting area 10 of the third-color sub-pixel 103 extending along the second direction and the second sub-defining structure 2002.

[0142] For example, as shown in Figures 13 and 14, only one of the straight lines extending along the second direction and passing through the two second confining structures 220 located on either side of the second color sub-pixel 102 passes through the first sub-confining structure 2001. By setting the distances between the first sub-confining structure 2001, the two second confining structures 220, and the light-emitting area 10 of the second color sub-pixel 102, it is helpful to reduce the channel ratio of the light-emitting functional layer 130 around the light-emitting area 10 of the second color sub-pixel 102, such as the red sub-pixel, thereby improving the crosstalk effect.

[0143] For example, as shown in FIG14 , a and e can be the same as the relevant parameters shown in FIG5 , and are not further described here. For example, the length of the first sub-definition structure 2001 is g1, and the length of the second sub-definition structure 2002 is g2, where g1 + g2 > e, thereby effectively isolating at least one layer of the light-emitting functional layer 130 surrounding the second color sub-pixel 102, such as the red sub-pixel, and improving the display's good crosstalk effect.

[0144] In the display substrate provided in this example, the respective features and relative positional relationships of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 are the same as the respective features and relative positional relationships of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 in the display substrates shown in Figures 3 and 5 and Figures 7 and 8, and are not described in detail here. The pixel defining pattern 300, the spacer 400, the base substrate 01, and the other film layers between the first electrode 110 and the base substrate 01 in the display substrate shown in this example may have the same features as the corresponding structures in the display substrates shown in Figures 3 to 6, and are not described in detail here. The cross-sectional shape and other features of the defining structure 200 in the display substrate shown in this example are the same as the cross-sectional features of the defining structure 200 in the display substrate shown in Figures 3 to 6, and are not described in detail here. The display substrate shown in this example schematically shows that the distance relationship between the second limiting structure 220 and the sub-pixel light-emitting areas 10 of different colors can be the same as the corresponding distance relationship in the display substrate shown in Figures 7 and 8, but is not limited to this. In this example, the distance relationship between the second limiting structure 220 and the sub-pixel light-emitting areas 10 of different colors can also be the same as the corresponding distance relationship in the display substrate shown in Figures 3 to 6, which will not be repeated here.

[0145] For example, in other examples, the second confinement structure 220 is closer to the light-emitting area 10 of the second color sub-pixel 102, while the distance between the first confinement structure 210 and the light-emitting area 10 of the first color sub-pixel 101 and the distance between the first confinement structure 210 and the light-emitting area 10 of the second color sub-pixel 102 can be equal. For example, the second confinement structure 220 located between adjacent sub-pixels can be a continuous structure or include a plurality of sub-confinement structures 2000 arranged at intervals.

[0146] Figures 15A and 15B are schematic planar structural diagrams of a pixel unit according to various examples of the present disclosure. The pixel units shown in Figures 15A and 15B differ from the pixel unit shown in Figure 9 in that, in a direction perpendicular to the substrate, the first confining structure 210 does not overlap with the first electrode 110 of each sub-pixel.

[0147] For example, as shown in Figures 15A and 15B, in the direction perpendicular to the substrate, the first limiting structure 211 does not overlap with the first electrodes 110 of the second color sub-pixel 102 and the third color sub-pixel 103, so as to avoid the anode via and prevent the depression at the position of the anode via from causing deformation of the first limiting structure.

[0148] For example, as shown in FIG15A , the first confining structure 211 located between the second color sub-pixel 102 and the first color sub-pixel 101 in the same pixel unit may include multiple sub-confining structures 2000, such as two sub-confining structures 2000 arranged along a first direction. For example, the first confining structure 211 located between the third color sub-pixel 103 and the first color sub-pixel 101 in the same pixel unit may include multiple sub-confining structures 2000, such as two sub-confining structures 2000 arranged along the first direction, such as four sub-confining structures 2000 may be provided between a first color sub-pixel 101 and other color sub-pixels. For example, only one sub-confining structure 2000 may be provided on the side of the second color sub-pixel 102 located in the same pixel unit away from the first color sub-pixel 101. For example, only one sub-confining structure 2000 may be provided on the side of the third color sub-pixel 103 located in the same pixel unit away from the first color sub-pixel 101.

[0149] For example, as shown in FIG15B , among the multiple sub-definition structures 2000 located between the first color sub-pixel 101 and the second color sub-pixel 102 in the same pixel unit, at least one sub-definition structure 2000 is close to the first color sub-pixel 101, and at least one sub-definition structure 2000 is close to the second color sub-pixel 102. For example, among the multiple sub-definition structures 2000 between the first color sub-pixel 101 and the third color sub-pixel 103, at least one sub-definition structure 2000 is close to the first color sub-pixel 101, and at least one sub-definition structure 2000 is close to the third color sub-pixel 103. By arranging the positions of different sub-definition structures, it is advantageous to adjust the continuity of the second electrode around the light-emitting areas of different color sub-pixels.

[0150] The distance between the two defined endpoints of the first defined structure shown in FIG. 15B may be D0.

[0151] The other structures in the display substrate shown in FIG. 15A and FIG. 15B may have the same features as the other structures in the display substrate shown in FIG. 9 , and are not described in detail here.

[0152] Figures 16 and 18 are schematic diagrams of partial planar structures of display substrates according to different examples of the present disclosure. Figure 17 is an enlarged view of region B in the display substrate shown in Figure 16 .

[0153] The differences between the display substrate shown in FIG16 and the display substrate shown in FIG3 to FIG14 include: a different pixel arrangement structure, a different shape of the light-emitting region 10 of each color sub-pixel 100, and a different planar shape and length of the limiting structure 200.

[0154] In some examples, as shown in Figures 16 and 17, multiple sub-pixels 100 include multiple second-color sub-pixels 102 and multiple third-color sub-pixels 103. The multiple sub-pixels 100 are arranged into multiple first sub-pixel groups 011 and multiple second sub-pixel groups 012, which are alternately arranged along a third direction. Each first sub-pixel group 011 includes first-color sub-pixels 101 and second-color sub-pixels 102, which are alternately arranged along a fourth direction. Each second sub-pixel group 012 includes third-color sub-pixels 103, which are arranged along the fourth direction. The third direction intersects the fourth direction, and both the third direction and the fourth direction intersect the first direction. For example, the multiple sub-pixels can be arranged in a blue diamond pixel arrangement.

[0155] The third direction may be the W direction shown in the figure or the direction opposite to the direction indicated by the arrow in the W direction, and the fourth direction may be the V direction shown in the figure or the direction opposite to the direction indicated by the arrow in the V direction. For example, both the third direction and the fourth direction intersect with the second direction. For example, the third direction and the fourth direction may be perpendicular to each other. For example, the third direction and the fourth direction may be interchangeable, which is not limited in the embodiments of the present disclosure. In this example, the luminous colors of the sub-pixels in the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 may be the same as those in the above example and will not be repeated here.

[0156] For example, as shown in Figures 16 and 17, the light-emitting area 10 of the first color sub-pixel 101 may have four corners, each of which may be arc-shaped, with the curvature of one of the four corners being greater than that of the other three corners. For example, the light-emitting areas 10 of the second color sub-pixel 102 and the third color sub-pixel 103 may both be quadrilaterals, such as quadrilaterals with rounded corners.

[0157] For example, as shown in Figures 16 and 17, the area of ​​the light-emitting area 10 of the first color sub-pixel 101 is larger than the area of ​​the light-emitting area 10 of the second color sub-pixel 102, and the area of ​​the light-emitting area 10 of the second color sub-pixel 102 is larger than the area of ​​the light-emitting area 10 of the third color sub-pixel 103.

[0158] In some examples, as shown in Figures 16 and 17, the first confinement structure 210 is located between the first color sub-pixel 101 and the third color sub-pixel 103, and the distance between the first confinement structure 210 and the light-emitting area 10 of the first color sub-pixel 101 is greater than the distance between the first confinement structure 210 and the light-emitting area 10 of the third color sub-pixel 103. For example, the first confinement structure 210 is closer to the light-emitting area 10 of the third color sub-pixel 103. Thus, the confinement structure 200 can be distributed between sub-pixels 100 of different colors in different pixel arrangements, such as being disposed near red or green sub-pixels that are prone to crosstalk, to isolate at least one layer of the light-emitting functional layer 130 of the different color sub-pixels 100 and reduce crosstalk.

[0159] For example, as shown in FIG17 , the distance between the light-emitting areas 10 of adjacent sub-pixels 100 (e.g., the PDL gap) is a, the distance between the first confinement structure 210 and the light-emitting area 10 of the first-color sub-pixel 101 is b, the length of the side of the first confinement structure 210 adjacent to the substrate 01 in a cross-section perpendicular to the first direction is c, and the distance between the first confinement structure 210 and the light-emitting area 10 of the third-color sub-pixel 103 is b', where b>b'. The cross-sectional shape and dimensional features of the confinement structure 200 in this example can be the same as those of the confinement structure 200 in the above example and are not further described here.

[0160] For example, as shown in Figures 16 and 17, only one defining endpoint 211 of the first defining structure 210 protrudes relative to the edge endpoint 111 of the first edge 11 of the light-emitting area 10 of the first color sub-pixel 101, and a straight line extending along the second direction passes through the orthographic projection of the other defining endpoint 211 of the first defining structure 210 on the substrate 01 and the orthographic projection of the first edge 11 on the substrate 01. For example, the distance between the two defining endpoints 211 of the first defining structure 210 is greater than the length of the first edge 11 of the first color sub-pixel 101. For example, the length of the first defining structure 210 is greater than the length of the first edge 11 of the first color sub-pixel 101.

[0161] In some examples, as shown in Figures 16 and 17, the edge of the third color sub-pixel 103 proximate to the first defining structure 210 extends along the first direction. For example, in the orthographic projection of the first defining structure 210 on the base substrate 01, two edges proximate to the first color sub-pixel 101 and the third color sub-pixel 103 are two first defining edges, at least one of which includes a portion extending along the first direction and a curved portion. The orthographic projection of the first defining structure 210 on the base substrate 01 also includes two second defining edges connecting the two first defining edges, and the length of the first defining edge is greater than the length of the second defining edge.

[0162] For example, as shown in Figures 16 and 17, the second confinement structure 220 is located between the second color sub-pixel 102 and the third color sub-pixel 103. For example, the second confinement structure 220 is closer to the second color sub-pixel 102. For example, the distance between the first confinement structure 210 and the light-emitting area 10 of the third color sub-pixel 103 is different from the distance between the second confinement structure 220 and the light-emitting area 10 of the third color sub-pixel 103. For example, the distance between the first confinement structure 210 and the light-emitting area 10 of the third color sub-pixel 103 is smaller than the distance between the second confinement structure 220 and the light-emitting area 10 of the third color sub-pixel 103. For example, the two edges of the second confinement structure 220 near the second color sub-pixel 102 and the third color sub-pixel 103 in the orthographic projection on the substrate 01 are two third confinement edges, and at least one of the third confinement edges includes a portion extending along the second direction and a curved portion.

[0163] 16 and 17 , the second defining structure 220 surrounds the light emitting region 10 of the second color sub-pixel 102. For example, the first defining structure 210 surrounds the light emitting region 10 of the first color sub-pixel 101.

[0164] 16 and 17 schematically illustrate that the first defining structures 210 and the second defining structures 220 located between adjacent sub-pixels are both continuous structures, but are not limited thereto. At least one first defining structure 210 and at least one second defining structure 220 may include a plurality of sub-defining structures arranged at intervals.

[0165] The base substrate 01 in the display substrate provided in this example, and the film layer between the first electrode 110 of the sub-pixel 100 and the base substrate 01 can have the same characteristics as the corresponding structures in any of the above examples, and will not be repeated here. The layer relationship and material characteristics of the spacer 400 and the limiting structure 200 in the display substrate provided in this example can have the same characteristics as the corresponding structures in any of the above examples, and will not be repeated here. The figure schematically shows that the planar shape of the spacer 400 is circular, but is not limited to this. The planar shape of the spacer 400 can also be a quadrilateral or other shape.

[0166] The display substrate shown in FIG18 has the same pixel arrangement structure as that shown in FIG16 , including, for example, a first sub-pixel group 011 and a second sub-pixel group 012 . The display substrate shown in FIG18 differs from the display substrate shown in FIG16 in the shape of the light-emitting region 10 of the sub-pixel 100, the shape of the first electrode 110 of the sub-pixel 100, and the planar shape of the defining structure 200. For example, the planar shape of the defining structure 200 can be an arc or other non-linear shape.

[0167] As shown in FIG18 , the first confining structure 210 has a curved shape, and its total length is greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in at least one direction. For example, the total length of the first confining structure 210 is greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in the first direction, or greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in the second direction, or greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in the third direction, or greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in the fourth direction, or greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in any other direction. By adjusting the shape of the first confining structure 210 and the relationship between its total length and the size of the light-emitting area 10 of the first color sub-pixel 101, the shape of the first confining structure 210 can be matched to the shape of the light-emitting area 10 of the sub-pixel, while reducing low-grayscale crosstalk caused by leakage current between the first color sub-pixel 101 and other color sub-pixels 100, and reducing the possibility of delamination of the first confining structure 210.

[0168] In some examples, as shown in FIG18 , the edge of the light-emitting area 10 of the third-color sub-pixel 103 has a curved shape, and the first confinement structure 210 is curved toward the light-emitting area 10 of the third-color sub-pixel 103. For example, the first confinement structure 210 is curved away from the light-emitting area 10 of the first-color sub-pixel 101. By curving the first confinement structure 210 toward the light-emitting area 10 of the third-color sub-pixel 103, the first confinement structure 210 can be brought closer to the light-emitting area 10 of the third-color sub-pixel 103, thereby reducing crosstalk from the third-color sub-pixel 103 to the first-color sub-pixel 101.

[0169] For example, as shown in Figure 18, the shapes of the light-emitting areas 10 of the second color sub-pixel 102 and the third color sub-pixel 103 are both circular, and the edges of the light-emitting area 10 of the first color sub-pixel 101 include curves, such as a plurality of curve segments connected in sequence, and the curvatures of the curve segments facing different directions of the light-emitting area 10 of the same first color sub-pixel 101 can be different to reduce color deviation.

[0170] For example, as shown in FIG18 , the light-emitting area 10 of the same third-color sub-pixel 103 is surrounded by two curved first confining structures 210, and the first confining structures 210 are closer to the light-emitting area 10 of the third-color sub-pixel 103. Of course, the embodiments of the present disclosure are not limited to the light-emitting area 10 of the third-color sub-pixel 103 being surrounded by two first confining structures 210, and may also be surrounded by one or more first confining structures 210.

[0171] In some examples, as shown in Figure 18, the multiple defining structures 200 also include multiple second defining structures 220, which are located at least between adjacent second color sub-pixels 102 and third color sub-pixels 103, and the distance between the second defining structure 220 and the light-emitting area 10 of the second color sub-pixel 102 is smaller than the distance between the second defining structure 220 and the light-emitting area 10 of the third color sub-pixel 103.

[0172] For example, as shown in FIG18 , the second confinement structure 220 has a curved shape, and the second confinement structure 220 is curved toward the light-emitting area 10 of the second color sub-pixel 102. For example, the second confinement structure 220 is curved away from the light-emitting area 10 of the third color sub-pixel 103. By curving the second confinement structure 220 toward the light-emitting area 10 of the second color sub-pixel 102, the second confinement structure 220 can be brought closer to the light-emitting area 10 of the second color sub-pixel 102, thereby reducing crosstalk from the second color sub-pixel 102 to the first color sub-pixel 101 and the third color sub-pixel 103.

[0173] For example, as shown in FIG18 , the light-emitting area 10 of the same second-color sub-pixel 102 is surrounded by two curved second confining structures 220, and the second confining structures 220 are closer to the light-emitting area 10 of the second-color sub-pixel 102. Of course, the embodiments of the present disclosure are not limited to the light-emitting area 10 of the second-color sub-pixel 102 being surrounded by two second confining structures 220, and may also be surrounded by one or more second confining structures 220.

[0174] FIG18 schematically shows that the first defining structure 210 and the second defining structure 220 located between adjacent sub-pixels are both continuous structures, but is not limited thereto. At least one first defining structure 210 and at least one second defining structure 220 may include a plurality of sub-defining structures arranged at intervals.

[0175] The base substrate 01 in the display substrate provided in this example, and the film layer between the first electrode 110 of the sub-pixel and the base substrate 01 can have the same characteristics as the corresponding structure in any of the above examples, and will not be repeated here. The layer relationship and material and other features of the spacer 400 and the defining structure in the display substrate provided in this example can have the same characteristics as the corresponding structure in any of the above examples, and will not be repeated here. The figure schematically shows that the planar shape of the spacer 400 is circular, but it is not limited to this. The planar shape of the spacer 400 can also be a quadrilateral or other shapes. A color film can be set on the encapsulation layer of the display substrate provided in this example, such as to form a COE product.

[0176] The display substrate provided by the present disclosure improves the poor display caused by crosstalk caused by materials in the light-emitting functional layer by setting the relative position relationship, relative distance and relative size between the limiting structure and the light-emitting areas of sub-pixels of different colors, thereby solving the low grayscale crosstalk problem caused by leakage current between red, green and blue sub-pixels brought about by Tandem technology.

[0177] The display substrate provided by the present disclosure can be applied to foldable display panels, laying a technical foundation for enhancing the toughness of the display panel and preventing the display panel from peeling.

[0178] The limiting structure provided by the present disclosure can be applied to various pixel arrangement structures, such as diamond, diamond-like, Pentile arrangement, sRGB, COE circular pixel arrangement, etc., to reduce the crosstalk caused by at least one layer of the light-emitting functional layer of different color sub-pixels.

[0179] Figure 19 is a schematic block diagram of a display device according to another embodiment of the present disclosure. As shown in Figure 19, a display device provided by an embodiment of the present disclosure includes any of the above-mentioned display substrates.

[0180] For example, the display device further includes a cover plate located on the light-emitting side of the display substrate.

[0181] 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.

[0182] For example, the display device may be a medium or large-sized display product, such as a display device having a display surface with a diagonal length of 10 inches or more, such as 20 inches.

[0183] For example, the display device can be applied to mobile phones, vehicle-mounted products, and foldable products.

[0184] There are a few points to note:

[0185] (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.

[0186] (2) In the absence of conflict, features in the same embodiment and different embodiments of the present disclosure may be combined with each other.

[0187] 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: substrate substrate; A plurality of sub-pixels are located on the substrate, and each of 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; A plurality of limiting structures are located between at least two adjacent sub-pixels of different colors and are configured to separate at least one layer of the light-emitting functional layer. The plurality of sub-pixels include a plurality of first color sub-pixels, and a defining structure among the plurality of defining structures that is adjacent to at least one first color sub-pixel is a first defining structure; At least a portion of the first defining structure extends along a first direction, the light-emitting area of ​​the first color sub-pixel includes a first edge extending along the first direction, the first defining structure includes two defining endpoints, and in the first direction, at least one defining endpoint protrudes relative to an edge endpoint of the first edge adjacent to the at least one defining endpoint, or the first defining structure has a curved shape, and the total length of the first defining structure is greater than the size of the light-emitting area of ​​the first color sub-pixel in at least one direction.

2. The display substrate according to claim 1, wherein, A distance between the two defining end points of the first defining structure is greater than a length of the first edge.

3. The display substrate according to claim 1 or 2, wherein A total length of a portion of the first limiting structure extending along the first direction is greater than a length of the first edge.

4. The display substrate according to any one of claims 1-3, wherein, The shape of the cross section of the limiting structure cut by a plane perpendicular to its extension direction includes an inverted trapezoid, the base angle between the waist of the inverted trapezoid and its bottom edge away from the substrate is 50 to 80 degrees, the length of the bottom edge of the inverted trapezoid close to the substrate is 1 to 6 microns, and the thickness of the limiting structure is 0.8 to 1.8 microns.

5. The display substrate according to any one of claims 1-4, wherein, The orthographic projection of the first edge on the substrate is a first orthographic projection, the orthographic projection of the first limiting structure on the substrate is a second orthographic projection, and the orthographic projection of the first orthographic projection on the straight line extending along the first direction is completely within the orthographic projection of the second orthographic projection on the straight line.

6. The display substrate according to claim 1, wherein, The light emitting area of ​​the first color sub-pixel further includes a second edge extending along a second direction, wherein the second direction intersects the first direction; The orthographic projection of one of the two defined endpoints on the substrate is located along the second direction A distance between the straight line extending in the direction of the first edge and the orthographic projection of the second edge on the substrate is less than 0.5 micrometers.

7. The display substrate according to any one of claims 1-5, wherein, The plurality of sub-pixels include a plurality of pixel units, and the plurality of pixel units are arranged in an array along the first direction and a second direction, and the second direction intersects the first direction; Each pixel unit includes a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, wherein the first color sub-pixel and the second color sub-pixel are arranged along the second direction, and the second color sub-pixel and the third color sub-pixel are arranged along the first direction; At least one side of the same first color sub-pixel in the second direction is provided with the first limiting structure adjacent thereto.

8. The display substrate according to claim 7, wherein, The first color sub-pixel is a blue sub-pixel, one of the second color sub-pixel and the third color sub-pixel is a red sub-pixel, and the other is a green sub-pixel.

9. The display substrate according to claim 7 or 8, wherein, The first defining structure is located between the first color sub-pixel and the second color sub-pixel, and a first distance between the first defining structure and the light-emitting region of the second color sub-pixel is less than a second distance between the first defining structure and the light-emitting region of the first color sub-pixel.

10. The display substrate according to claim 9, wherein, The difference between the second distance and the first distance is not less than 1 micrometer.

11. The display substrate according to claim 7 or 8, wherein, The first defining structure is located between the first color sub-pixel and the second color sub-pixel, and a ratio of a distance between the first defining structure and the light-emitting region of the second color sub-pixel to a distance between the first defining structure and the light-emitting region of the first color sub-pixel is 0.9 to 1.

1.

12. The display substrate according to any one of claims 7-11, wherein, At least one first defining structure includes two sub-defining structures arranged at intervals along the first direction, and a straight line extending along the second direction passes through an interval between orthographic projections of the two sub-defining structures on the substrate and an interval between orthographic projections of the light-emitting regions of the second color sub-pixel and the third color sub-pixel on the substrate.

13. The display substrate according to any one of claims 7-11, wherein, At least one first defining structure includes two sub-defining structures arranged at intervals along the first direction, and a straight line extending along the second direction passes through an interval between orthographic projections of the two sub-defining structures on the substrate and an orthographic projection of the light-emitting region of the third color sub-pixel on the substrate.

14. The display substrate according to any one of claims 7-13, wherein, The plurality of defining structures further includes a plurality of second defining structures, at least located between adjacent second color sub-pixels and third color sub-pixels.

15. The display substrate according to claim 14, wherein, A third distance between the second defining structure and the light-emitting region of the second color sub-pixel is less than a fourth distance between the second defining structure and the light-emitting region of the third color sub-pixel.

16. The display substrate according to claim 14, wherein, A ratio of a distance between the second defining structure and the light-emitting region of the second color sub-pixel to a distance between the second defining structure and the light-emitting region of the third color sub-pixel is 0.9 to 1.

1.

17. The display substrate according to any one of claims 1-16, further comprising: a pixel defining pattern located on the substrate, the pixel defining pattern including a plurality of openings and a pixel defining portion surrounding the plurality of openings, the plurality of openings being configured to define the light-emitting regions of at least some of the sub-pixels; a plurality of spacers located on a side of the pixel defining portion away from the substrate; wherein a distance between the light-emitting regions of adjacent sub-pixels is 10 to 30 micrometers, the plurality of defining structures and the plurality of spacers are provided on the same layer and have the same material, and a height of at least some of the spacers is greater than a height of the plurality of defining structures.

18. The display substrate according to any one of claims 1-5, wherein, The plurality of sub-pixels includes a plurality of second color sub-pixels and a plurality of third color 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 along a third direction, each first sub-pixel group includes the first color sub-pixel and the second color sub-pixel alternately arranged along a fourth direction, each second sub-pixel group includes the third color sub-pixel arranged along the fourth direction, the third direction intersects with the fourth direction, and both the third direction and the fourth direction intersect with the first direction; The first defining structure is located between the first color sub-pixel and the third color sub-pixel, and the distance between the first defining structure and the light-emitting region of the first color sub-pixel is greater than the distance between the first defining structure and the light-emitting region of the third color sub-pixel.

19. The display substrate according to claim 18, wherein, The edge of the third color sub-pixel adjacent to the first defining structure extends along the first direction.

20. The display substrate according to claim 18, wherein The edge of the light-emitting region of the third color sub-pixel has a curved shape, and the first defining structure is curved toward the light-emitting region of the third color sub-pixel.

21. The display substrate according to any one of claims 18-20, wherein, The plurality of defining structures further includes a plurality of second defining structures, which are at least located between adjacent second color sub-pixels and third color sub-pixels, and the distance between the second defining structure and the light-emitting region of the second color sub-pixel is less than the distance between the second defining structure and the light-emitting region of the third color sub-pixel.

22. A display device, comprising the display substrate according to any one of claims 1-21.

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