Display substrate and display apparatus

Abstract

Provided are a display substrate and a display apparatus. The display substrate comprises a base substrate, a plurality of sub-pixels, and a pixel defining pattern. Each sub-pixel in at least part of the sub-pixels comprises a light-emitting element, the light-emitting element comprising a light-emitting functional layer having a plurality of film layers. The pixel defining pattern comprises a plurality of openings and a defining part surrounding the plurality of openings, the defining part comprising a first defining part located between adjacent light-emitting elements. The size of the cross section of the first defining part truncated by a plane in a second direction is a cross-section size, the cross-section size first increasing and then decreasing in a first direction, and the position of the maximum cross-section size being located at a partition part of the first defining part. At least part of the pattern of at least one layer in each light-emitting functional layer is located on a side of the first defining part away from the base substrate, and the orthographic projection of an edge of the at least part of the pattern on the base substrate falls within the orthographic projection of the first defining part on the base substrate, so that crosstalk between adjacent sub-pixels can be reduced.

Description

Display substrate and display device Technical Field

[0001] At least one embodiment of the present disclosure relates to a display substrate and a display device thereof. Background Art

[0002] With the development of display technology, users have increasingly demanded higher performance from display devices. In some products, the high brightness and low power consumption requirements of display devices can be met to the greatest extent possible by isolating the light-emitting material layer between adjacent sub-pixels to reduce signal crosstalk and optimize display performance.

[0003] Summary of the Invention

[0004] Embodiments of the present disclosure provide a display substrate and a display device.

[0005] An embodiment of the present disclosure provides a display substrate, comprising: a base substrate, a plurality of sub-pixels, and a pixel defining pattern, wherein the plurality of sub-pixels are located on the base substrate, and each of at least some of the sub-pixels includes a light-emitting element, wherein the light-emitting element includes a light-emitting functional layer having multiple film layers, wherein the multiple film layers are stacked in a first direction; the pixel defining pattern includes a plurality of openings and defining portions surrounding the plurality of openings, wherein at least some of the light-emitting elements are located in the openings, wherein the defining portions include a first defining portion located between adjacent light-emitting elements, wherein a cross-section of the first defining portion cut by a plane in a second direction is a cross-sectional dimension, wherein along the first direction, the cross-sectional dimension first increases and then decreases, and the maximum position of the cross-sectional dimension is located at a partition of the first defining portion, wherein the first direction is perpendicular to the base substrate, the plane and the second direction are both perpendicular to an extension direction of the first defining portion, and the first direction is perpendicular to the base substrate, and the second direction is perpendicular to the first direction; at least a portion of a pattern of at least one layer of the light-emitting functional layer is located on a side of the first defining portion away from the base substrate, and an orthographic projection of an edge of the at least portion of the pattern on the base substrate falls within an orthographic projection of the first defining portion on the base substrate.

[0006] For example, according to the display substrate disclosed in the present invention, the light-emitting element also includes a first electrode and a second electrode located on both sides of the light-emitting functional layer along a first direction, the first electrode is located between the light-emitting functional layer and the base substrate, the first defining portion includes a first sub-defining portion and a second sub-defining portion that are stacked, the first sub-defining portion is located between the second sub-defining portion and the base substrate, the material of the first sub-defining portion is different from the material of the second sub-defining portion, and the separating portion includes a junction where the first sub-defining portion and the second sub-defining portion are connected to each other.

[0007] For example, according to the display substrate of the present disclosure, the interface where the first sub-defining portion and the second sub-defining portion contact each other is the position where the cross-sectional dimension is the largest.

[0008] For example, according to the display substrate disclosed herein, the contact surface between the first sub-defining portion and the second sub-defining portion is a first surface, the contact surface between the second sub-defining portion and the first sub-defining portion is a second surface, and the orthographic projection of the second surface on the base substrate is completely within the orthographic projection of the first surface on the base substrate.

[0009] For example, according to the display substrate of the present disclosure, the surface of the second sub-defining portion on the side away from the base substrate includes a curved surface curved toward the side away from the base substrate or a flat surface parallel to the base substrate.

[0010] For example, according to the display substrate of the present disclosure, the second electrode of at least part of the light emitting elements includes a portion extending along the second direction and another portion having a component extending in the first direction.

[0011] For example, according to the display substrate disclosed in the present invention, at least a partial pattern of at least one layer of the light-emitting functional layer includes a first part and a second part, the orthographic projection of the edge of the first part on the base substrate falls into the orthographic projection of the first limiting part on the base substrate, and the edge of the first part is located on the side of the partition away from the base substrate, and the edge of the second part is located on the side of the partition close to the base substrate.

[0012] For example, according to the display substrate of the present disclosure, in the first direction, a distance between an edge of the first portion and an edge of the second portion is 0.2 μm to 0.5 μm.

[0013] For example, according to the display substrate of the present disclosure, the second electrodes of at least some adjacent sub-pixels are continuously arranged at the edge of the partition.

[0014] For example, according to the display substrate disclosed in the present invention, the cross-section includes a side edge located between the position of the maximum cross-section size and the base substrate, the angle between at least a part of the side edge and the second direction is 95°~105°, and the maximum size of the first sub-limiting portion in the first direction is 0.7μm~1μm; the cross-section includes a side line located on the side of the maximum cross-section size away from the base substrate, the angle between the tangent of the side line and the connection point of the maximum cross-section size and the second direction is 35°~45°, and the maximum size of the second sub-limiting portion in the first direction is 1.15μm~1.25μm.

[0015] For example, according to the display substrate of the present disclosure, the maximum dimension of the first defining portion in the second direction is 13 μm to 19 μm.

[0016] For example, according to the display substrate of the present disclosure, two adjacent sub-pixels arranged along the second direction are configured to emit light of different colors, and a first defining portion is provided between the two adjacent sub-pixels.

[0017] For example, according to the display substrate of the present disclosure, the second electrodes of adjacent sub-pixels are disconnected at the edge of the partition.

[0018] For example, according to the display substrate disclosed in the present invention, the cross-section includes a side edge located between the position of the maximum cross-section size and the base substrate, the angle between at least a part of the side edge and the second direction is 100°~110°, and the maximum size of the first sub-limiting portion in the first direction is 1μm~1.2μm; the cross-section includes a side line located on the side of the maximum cross-section size away from the base substrate, the angle between the tangent of the side line and the connection point of the maximum cross-section size and the second direction is 35°~45°, and the maximum size of the second sub-limiting portion in the first direction is 0.9μm~1.1μm.

[0019] For example, according to the display substrate of the present disclosure, the maximum dimension of the first defining portion in the second direction is 5 μm to 9 μm.

[0020] For example, according to the display substrate disclosed in the present invention, the defining portion also includes a second defining portion, which is adjacent to the edge of the light-emitting area of ​​the light-emitting element, and the extension direction of the second defining portion is the same as the extension direction of the first defining portion, wherein in the first direction, the size of the second defining portion is smaller than the size of the first defining portion, and the second defining portion is made of the same material as the second sub-defining portion.

[0021] For example, according to the display substrate of the present disclosure, in the first direction, the size of the second defining portion is larger than the size of the second sub-defining portion.

[0022] For example, according to the display substrate of the present disclosure, two adjacent sub-pixels arranged along the second direction are configured to emit light of different colors, and two first defining portions or one first defining portion and one second defining portion are spaced apart from each other.

[0023] For example, according to the display substrate disclosed herein, the position with the largest cross-sectional dimension is further away from the base substrate than the surface of the light-emitting functional layer on the side away from the base substrate.

[0024] For example, according to the display substrate disclosed herein, the material of the first sub-defining portion has a first photosensitive property so that the first sub-defining portion is polymerized when exposed to light; the material of the second sub-defining portion has a second photosensitive property so that the second sub-defining portion is decomposed when exposed to light.

[0025] For example, according to the display substrate of the present disclosure, the material of the first sub-defining portion includes phenolic resin and propylene glycol methyl ether acetate, and / or the material of the second sub-defining portion includes polyimide resin and propylene glycol methyl ether acetate.

[0026] For example, according to the display substrate disclosed herein, the first defining portion is located between the light-emitting areas of the light-emitting elements of two adjacent sub-pixels, and the orthographic projections of the first defining portion on the base substrate overlap with the orthographic projections of the first electrodes of the light-emitting elements of the two adjacent sub-pixels on the base substrate.

[0027] For example, according to the display substrate of the present disclosure, the orthographic projection of the first defining portion surrounding the opening on the base substrate is a closed ring.

[0028] For example, according to the display substrate disclosed herein, the orthographic projection of the first limiting portion surrounding the opening on the base substrate is an open ring, and the second electrodes of adjacent light-emitting elements are at least partially connected at the gap of the open ring.

[0029] For example, according to the display substrate disclosed in the present invention, the edges of the light-emitting areas of at least part of the sub-pixels include a first edge adjacent to the first limiting portion and a second edge adjacent to the second limiting portion, at least parts of the first edges of the light-emitting areas of the two adjacent sub-pixels are arranged opposite to each other, and the first limiting portions respectively adjacent to the first edges of the light-emitting areas of the two adjacent sub-pixels have a first interval between their orthographic projections on the base substrate; the second edge of the light-emitting area of ​​the sub-pixel is at least partially arranged opposite to the first edge of the light-emitting area of ​​the adjacent sub-pixel, and the limiting portions adjacent to the second and first edges arranged opposite to each other have a second interval between their orthographic projections on the base substrate.

[0030] For example, according to the display substrate of the present disclosure, in the arrangement direction of the sub-pixels, the size of the first interval is larger than the size of the second interval.

[0031] For example, according to the display substrate disclosed herein, the multiple sub-pixels include multiple first color sub-pixels, 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 first arrangement direction, the first sub-pixel group includes the first color sub-pixels and the second color sub-pixels alternately arranged along a second arrangement direction, the second sub-pixel group includes the third color sub-pixels arranged along the second arrangement direction, and the first arrangement direction intersects with the second arrangement direction; the first sub-pixel group and the second sub-pixel group are staggered in the second arrangement direction, and each first color sub-pixel in at least part of the first color sub-pixels is surrounded by eight sub-pixels, and the eight sub-pixels include the third color sub-pixels and the second color sub-pixels alternately arranged.

[0032] For example, according to the display substrate disclosed herein, the multiple sub-pixels include multiple first-color sub-pixels, multiple second-color sub-pixels, and multiple third-color sub-pixels, and the multiple sub-pixels include multiple pixel units arranged in an array along a first arrangement direction and a second arrangement direction, and each pixel unit includes a first-color sub-pixel, a second-color sub-pixel, and a third-color sub-pixel; in each pixel unit, the second-color sub-pixel and the third-color sub-pixel are alternately arranged along the first arrangement direction, and the first-color sub-pixel and the third-color sub-pixel are alternately arranged along the second arrangement direction, and the first arrangement direction intersects with the second arrangement direction.

[0033] For example, according to the display substrate of the present disclosure, a first limiting portion is provided between adjacent sub-pixels.

[0034] For example, according to the display substrate of the present disclosure, the orthographic projection of the portion of the light-emitting functional layer of the light-emitting element located in the opening on the base substrate at least partially overlaps with the orthographic projection of the first sub-defining portion surrounding the opening on the base substrate.

[0035] At least one embodiment of the present disclosure further provides a display substrate, comprising: a base substrate, a plurality of sub-pixels, a pixel defining pattern, and a partition structure, wherein the plurality of sub-pixels are located on the base substrate, and each sub-pixel in at least some of the sub-pixels comprises a light-emitting element, wherein the light-emitting element comprises a light-emitting functional layer and a second electrode located along a first direction away from the light-emitting functional layer and away from the base substrate, wherein the first direction is perpendicular to the base substrate; the pixel defining pattern comprises a plurality of openings and defining portions surrounding the plurality of openings, wherein at least a portion of the light-emitting element is located in the openings, and the partition structure is located between the defining portions adjacent to each of two adjacent openings, and the partition structure The material of the partition structure is different from the material of the limiting portion, the maximum dimension of the first side line of the cross section of the partition structure cut by a plane in the second direction away from the base substrate is larger than the maximum dimension of the second side line of the cross section close to the base substrate in the second direction, the plane and the second direction are both perpendicular to the extension direction of the limiting portion, and the second direction is perpendicular to the first direction, between at least two adjacent light-emitting elements, at least one layer of the light-emitting functional layer is disconnected at the edge of the partition structure, and at least a portion of the second electrode corresponding to at least one light-emitting element extends from the light-emitting area of ​​the light-emitting element to the light-emitting area of ​​at least one adjacent light-emitting element.

[0036] For example, according to the display substrate of the present disclosure, the material of the partition structure includes phenolic resin and propylene glycol methyl ether acetate, and / or the material of the defining portion includes polyimide resin and propylene glycol methyl ether acetate.

[0037] For example, according to the display substrate disclosed in the present invention, the cross-section includes a side edge located between the position of the maximum cross-section size and the base substrate, the angle between at least a portion of the side edge and the second direction is 95° to 105°, and the maximum size of the partition structure in the first direction is 0.7μm to 1μm; the cross-section of the defining portion cut by the plane includes a third side line away from the base substrate, the angle between the tangent of at least a portion of the third side line and the second direction is 35° to 45°, and the maximum size of the defining portion in the first direction is 1.15μm to 1.25μm.

[0038] For example, according to the display substrate of the present disclosure, the maximum dimension of the partition structure in the second direction is 3 μm to 6 μm.

[0039] For example, according to the display substrate of the present disclosure, in the second direction, the distance between the partition structure and the adjacent light-emitting area is 4 μm to 7 μm.

[0040] At least one embodiment of the present disclosure further provides a display device comprising any of the display substrates described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

[0042] FIG1 is a schematic diagram of a display substrate.

[0043] FIG2 is a cross-sectional view of a display substrate provided by at least one embodiment of the present disclosure.

[0044] FIG3 is a cross-sectional view of another display substrate provided by at least one embodiment of the present disclosure.

[0045] FIG4 is a cross-sectional view of another display substrate provided by at least one embodiment of the present disclosure.

[0046] FIG5 is a cross-sectional view of another display substrate provided by at least one embodiment of the present disclosure.

[0047] FIG6 is a partial plan view of a display substrate provided by at least one embodiment of the present disclosure.

[0048] FIG7 is a partial plan view of another display substrate provided by at least one embodiment of the present disclosure.

[0049] FIG8 is a cross-sectional view of another display substrate provided by at least one embodiment of the present disclosure.

[0050] FIG9 is a cross-sectional view of yet another display substrate provided by at least one embodiment of the present disclosure.

[0051] FIG10 is a partial plan view of a display substrate corresponding to FIG8 provided in at least one embodiment of the present disclosure.

[0052] FIG11 is a partial plan view of yet another display substrate corresponding to FIG8 provided in at least one embodiment of the present disclosure.

[0053] FIG12 is a partial plan view of yet another display substrate corresponding to FIG8 provided in at least one embodiment of the present disclosure.

[0054] FIG13 is a partial plan view of yet another display substrate corresponding to FIG8 provided in at least one embodiment of the present disclosure.

[0055] FIG14 is a partial plan view of a display substrate corresponding to FIG9 provided in at least one embodiment of the present disclosure.

[0056] FIG15 is a partial plan view of yet another display substrate corresponding to FIG9 provided in at least one embodiment of the present disclosure.

[0057] FIG16 is a partial plan view of yet another display substrate corresponding to FIG9 provided in at least one embodiment of the present disclosure.

[0058] FIG17 is a partial plan view of yet another display substrate corresponding to FIG9 provided in at least one embodiment of the present disclosure.

[0059] FIG18 is a cross-sectional view of yet another display substrate provided by at least one embodiment of the present disclosure.

[0060] FIG19 is a partial plan view of a display substrate corresponding to FIG18 provided in at least one embodiment of the present disclosure.

[0061] FIG20 is a partial plan view of another display substrate corresponding to FIG18 provided by at least one embodiment of the present disclosure.

[0062] FIG21 is a schematic diagram of a display device provided according to an embodiment of the present disclosure.

[0063] FIG22 is a spectrum diagram of a display substrate provided by an embodiment of the present disclosure.

[0064] 23 to 40 are schematic flow charts of a method for manufacturing a display substrate according to at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0065] 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.

[0066] 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.

[0067] 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.

[0068] Typically, organic light-emitting diodes (OLEDs) emit light through carrier injection and recombination, driven by an electric field, using organic semiconductor materials and luminescent materials. For example, OLEDs can be categorized by their driving method as passive matrix-driven OLEDs (PMOLEDs) and active matrix-driven OLEDs (AMOLEDs). Active matrix-driven OLEDs offer advantages such as low manufacturing cost, low power consumption, DC drive for portable devices, and a wide operating temperature range.

[0069] Figure 1 is a schematic diagram of a display substrate. As shown in Figure 1, the display substrate 001 includes a planarization layer 010, a pixel defining layer 011, a first electrode 012, a light-emitting functional layer 020, and a second electrode 013. For example, the first electrode 012 can be an anode, and the second electrode 013 can be a cathode. For example, the light-emitting functional layer 020 can include multiple film layers, such as a hole transport layer 021, a light-emitting layer 022, and an electron transport layer 023. Figure 1 schematically shows that the first electrode 012 is electrically connected to the corresponding pixel circuit through the connection hole N0 located in the planarization layer 010. The pixel circuit is located between the planarization layer 010 and the base substrate 10. Figure 1 does not show the specific location of the pixel circuit.

[0070] FIG1 shows a light-emitting element EM1 and a light-emitting element EM2 of adjacent sub-pixels. For example, the light-emitting element EM1 is configured to emit red light, and the light-emitting element EM2 is configured to emit green light, that is, the light-emitting element EM1 corresponds to the light-emitting layer 0221 that emits red light, and the light-emitting element EM2 corresponds to the light-emitting layer 0222 that emits green light. For example, the multiple film layers of the light-emitting element EM1 and the light-emitting element EM2 can be independent structures of each other, but are not limited to this. For example, in some embodiments, the light-emitting layer of the light-emitting element EM1 and the light-emitting layer of the light-emitting element EM2 can also be an integrated structure and be manufactured using an open mask. It should be noted that, for the sake of clarity, FIG1 only shows some of the film layers in the display substrate. For example, the display substrate also includes multiple other film layers, such as an encapsulation layer.

[0071] However, as product resolution continues to increase, the spacing between the pixel-defining layers of the display substrate between sub-pixels continues to shrink. When the highly conductive film layer (for example, the charge generation layer) in the light-emitting element is set as a full-surface film layer, crosstalk is likely to occur between adjacent sub-pixels. For example, at low grayscales, a green sub-pixel may cause the adjacent red sub-pixel to emit light. This phenomenon is particularly obvious in low grayscale displays, ultimately leading to brightness attenuation and color coordinate shift of the sub-pixels in monochrome, which in turn affects the display quality of the display substrate.

[0072] In some solutions, by providing isolation columns between adjacent sub-pixels, at least one film layer in the light-emitting functional layer of the adjacent sub-pixels can be disconnected, thereby reducing the probability of crosstalk between adjacent sub-pixels. The isolation column proposed in the above scheme usually adopts a "sandwich" structure of SiO / SiN / SiO. Due to the weak adhesion between SiO and the pixel defining layer, gaps are easily generated, and then the "SiO peeling" phenomenon ("SiO peeling" phenomenon, for example, "SiO and pixel defining layer peeling" phenomenon) occurs; at the same time, during the production process of the "sandwich" structure, the thickness accuracy of SiN is difficult to control, which may lead to uneven thickness of the entire "sandwich" structure, resulting in poor cutting ability of the isolation column. Moreover, when the thickness of SiN in the "sandwich" structure needs to be changed, the operation is difficult and the process fluctuations are large, resulting in poor control over the "undercut" structure ("undercut" structure) formed by the "sandwich" structure; in addition, the "sandwich" structure is usually formed by a dry etching process, which may damage the anode in the light-emitting element during the production process, and is prone to anode "blast" phenomenon ("explosion" phenomenon). For example, the anode "blast" phenomenon may have the risk of explosion injury.

[0073] Embodiments of the present disclosure provide a display substrate and a display device.

[0074] At least one embodiment of the present disclosure provides a display substrate comprising: a base substrate, a plurality of sub-pixels, and a pixel defining pattern. The plurality of sub-pixels are located on the base substrate, each of at least some of the sub-pixels includes a light-emitting element, the light-emitting element including a light-emitting functional layer having multiple film layers, the multiple film layers being stacked in a first direction; the pixel defining pattern includes a plurality of openings and defining portions surrounding the plurality of openings, at least some of the light-emitting elements are located in the openings, the defining portions include a first defining portion located between adjacent light-emitting elements, a cross-sectional dimension of the first defining portion cut by a plane in a second direction being a cross-sectional dimension, the cross-sectional dimension first increasing and then decreasing along the first direction, and the maximum position of the cross-sectional dimension is located at a partition of the first defining portion, the first direction is perpendicular to the base substrate, the plane and the second direction are both perpendicular to the extension direction of the first defining portion, the first direction is perpendicular to the base substrate, and the second direction is perpendicular to the first direction; at least a portion of a pattern of at least one layer of the light-emitting functional layer is located on a side of the first defining portion away from the base substrate, and the orthographic projection of an edge of the at least portion of the pattern on the base substrate falls within the orthographic projection of the first defining portion on the base substrate.

[0075] The display substrate provided by the embodiment of the present disclosure is capable of effectively blocking at least one film layer in the light-emitting functional layer by arranging a first defining portion having a partition between adjacent light-emitting elements, and making the cross-sectional size of the first defining portion along the first direction first increase and then decrease, thereby reducing the risk of crosstalk between adjacent sub-pixels and brightness reduction due to sub-pixel leakage. The first defining portion has a simple structure and is easy to manufacture.

[0076] The display substrate and the display device provided by the embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0077] FIG2 is a cross-sectional view of a display substrate provided by at least one embodiment of the present disclosure.

[0078] As shown in FIG2 , the display substrate 01 includes a base substrate 10 and a plurality of sub-pixels 20. The plurality of sub-pixels 20 are located on the base substrate 10, and each of at least some of the sub-pixels 20 includes a light-emitting element 200. The light-emitting element 200 includes a light-emitting functional layer 202 having multiple film layers, which are stacked in a first direction X. For example, the light-emitting element 200 may further include a first electrode 201 and a second electrode 203 located on either side of the light-emitting functional layer 202 along the first direction X. The first electrode 201 is located between the light-emitting functional layer 202 and the base substrate 10, and the first direction X is perpendicular to the base substrate 10.

[0079] For example, as shown in Figure 2, the light-emitting functional layer 202 may include multiple film layers, such as a hole transport layer 2021, a light-emitting layer 2022 and an electron transport layer 2023, and the hole transport layer 2021 and the electron transport layer 2023 are respectively located on both sides of the light-emitting layer 2022. For example, the light-emitting functional layer 202 may also include a hole injection layer, a light coupling layer, and an electron injection layer. For example, the above-mentioned film layers are all common film layers of the light-emitting element and can be called common layers. For example, the first electrode 201 can be an anode, and the second electrode 203 can be a cathode. For example, the anode can be formed of a transparent conductive material with a high work function, such as ITO (Indium tin oxide), but is not limited thereto. For example, the cathode can be formed of a material with high conductivity and low work function, for example, the cathode can be made of a metal material.

[0080] As shown in FIG2 , the display substrate 01 further includes a pixel-defining pattern 30, which includes a plurality of openings 301 and a defining portion 302 surrounding the plurality of openings 301. At least a portion of the light-emitting element 200 is located within the openings 301. The openings 301 of the pixel-defining pattern 30 are configured to define a light-emitting region of the light-emitting element 200. For example, the light-emitting element 200 may include a portion located within the openings 301 and a portion overlapping the defining portion 302 in a direction perpendicular to the base substrate 10. For example, as shown in FIG2 , the openings 301 of the pixel-defining pattern 30 are configured to expose the first electrode 201 of the light-emitting element 200, and the exposed first electrode 201 is at least partially in contact with the light-emitting functional layer 202 in the light-emitting element 200.

[0081] Figure 2 also schematically illustrates that a structural layer 40 is provided on a side of the first electrode 201 of the light-emitting element 200 away from the second electrode 203. For example, the structural layer 40 may include a planarization layer, a layer containing an active semiconductor pattern, a film layer containing gate lines, a film layer containing data lines, and multiple insulating layers. Figure 2 schematically illustrates that the first electrode 201 is electrically connected to a corresponding pixel circuit via a connection hole N1 located in the structural layer 40. At least a portion of the pixel circuit is located in the structural layer 40. Figure 2 does not illustrate the specific location of the pixel circuit.

[0082] As shown in FIG2 , the defining portion 302 includes a first defining portion 303 located between adjacent light-emitting elements 200 . The cross-sectional dimension of the first defining portion 303 in a second direction Y is defined by a plane. Both the plane and the second direction Y are perpendicular to the extension direction of the first defining portion 303 , and the second direction Y is perpendicular to the first direction X. Along the first direction X, the cross-sectional dimension first increases and then decreases, with the maximum position of the cross-sectional dimension located at the partition 304 of the first defining portion 303 . At least a portion of the pattern of at least one layer of the light-emitting functional layer 202 is located on a side of the first defining portion 303 away from the base substrate 10 , and the orthographic projection of the edge of the at least portion of the pattern on the base substrate 10 falls within the orthographic projection of the first defining portion 303 on the base substrate 10 . In other words, at least one layer of the light-emitting functional layer 202 is disconnected at the edge of the partition 304 facing the light-emitting element 200 . The above-mentioned edge is formed after at least a portion of the pattern of at least one layer of the light-emitting functional layer 202 is separated by the partition 304. This edge is different from the edge of the portion of the pattern in at least one layer of the light-emitting functional layer 202 corresponding to the sub-pixel during the process of manufacturing.

[0083] For example, as shown in FIG2 , the portions of the first defining portion 303 on either side of the partition 304, as measured by the plane, may have different shapes, or may have the same or similar shapes, which is not limited in the present disclosure. For example, the portion of the first defining portion 303 on the side of the partition 304 away from the base substrate 10, as measured by the plane, may have an arched shape, while the portion of the first defining portion 303 on the side of the partition 304 closer to the base substrate 10, as measured by the plane, may have a trapezoidal shape, with the lower base of the trapezoid further away from the base substrate 10 than the upper base. However, the present disclosure is not limited thereto.

[0084] For example, as shown in FIG2 , along the first direction X, the cross-sectional dimension of the first defining portion 303 may first gradually increase and then gradually decrease, but is not limited thereto. For example, the cross-sectional dimension of the first defining portion 303 may discontinuously increase or decrease, as long as the partition 304 is located at the maximum position of the cross-sectional dimension. This is not limited in the embodiments of the present disclosure.

[0085] For example, as shown in FIG2 , the cross section of the first defining portion 303 has a sharp corner corresponding to the position of the partition 304. This structural feature enables the first defining portion 303 to effectively isolate at least one film layer in the light-emitting functional layer 202, thereby reducing the probability of crosstalk between two adjacent sub-pixels and a decrease in sub-pixel brightness. When the luminous colors of adjacent sub-pixels are different, it is beneficial to reduce the risk of color mixing on the display substrate.

[0086] For example, as shown in FIG2 , at least one layer of the light-emitting functional layer 202, such as the electron transport layer 2023, has at least a partial pattern in the layer including a first portion 20231 and a second portion 20232. The orthographic projection of the edge of the first portion 20231 on the base substrate 10 falls within the orthographic projection of the first defining portion 303 on the base substrate. The edge of the first portion 20231 is located on the side of the partition 304 away from the base substrate 10, and the edge of the second portion 20232 is located on the side of the partition 304 closer to the base substrate 10. For example, the first portion 20231 and the second portion 20232 are respectively two portions of the electron transport layer 2023 separated by the partition 304. The orthographic projection of the first portion 20231 on the base substrate 10 and the orthographic projection of the second portion 20232 on the base substrate 10 may be continuous in the second direction Y, but are not limited thereto.

[0087] For example, as shown in Figure 2, in the first direction X, the distance between the edge of the first part 20231 and the edge of the second part 20232 can be 0.2μm~0.5μm, for example, it can be at least one of 0.2μm~0.4μm, 0.3μm~0.5μm, 0.2μm~0.3μm and 0.25μm~0.45μm, but is not limited to this.

[0088] For example, as shown in FIG2 , at least one of the above-mentioned light-emitting functional layers 202 may be a layer separated at the partition 304 , for example, it may also be a hole transport layer 2021 , a light-emitting layer 2022 , etc., and the embodiments of the present disclosure are not limited to this.

[0089] For example, as shown in Figure 2, the first defining portion 303 includes a first sub-defining portion 3021 and a second sub-defining portion 3022 that are stacked, the first sub-defining portion 3021 is located between the second sub-defining portion 3022 and the base substrate 10, and the separating portion 304 includes the boundary between the first sub-defining portion 3021 and the second sub-defining portion 3022.

[0090] As shown in FIG2 , the material of the first sub-defining portion 3021 is different from the material of the second sub-defining portion 3022. For example, as shown in FIG2 , the material of the first sub-defining portion 3021 has a first photosensitive property, causing the first sub-defining portion 3021 to polymerize upon exposure to light, while the material of the second sub-defining portion 3022 has a second photosensitive property, causing the second sub-defining portion 3022 to decompose upon exposure to light. The different photosensitive properties of the first sub-defining portion 3021 and the second sub-defining portion 3022 facilitate manufacturing and reduce the risk of the second sub-defining portion 3022 damaging the first sub-defining portion 3021 during, for example, an exposure process.

[0091] For example, as shown in FIG2 , the material of the first sub-defining portion 3021 may include phenolic resin and propylene glycol methyl ether acetate, and the material of the second sub-defining portion 3022 may include polyimide resin and propylene glycol methyl ether acetate, but are not limited thereto. For example, in some embodiments, the material of the second sub-defining portion 3022 may also include acrylic or polyethylene terephthalate.

[0092] In this arrangement, the first sub-defining portion 3021 uses a material different from that of the second sub-defining portion 3022, which makes it easier to adhere to the second sub-defining portion 3022, reducing the risk of peeling, dislocation and the like; at the same time, the shape and size of the first sub-defining portion 3021 made of the above-mentioned material are more controllable, which is convenient for various deformation designs, more conducive to adapting to different size requirements, and has smaller process fluctuations; on the other hand, the first sub-defining portion 3021 and the second sub-defining portion 3022 can be formed without a dry etching process, for example, a wet etching process can be used, thereby having less impact on the first electrode 201 in the light-emitting element 200.

[0093] For example, as shown in Figure 2, the interface between the first sub-defining portion 3021 and the second sub-defining portion 3022 is at the location with the largest cross-sectional dimension. For example, the contact surface between the first sub-defining portion 3021 and the second sub-defining portion 3022 is the first surface 305, and the contact surface between the second sub-defining portion 3022 and the first sub-defining portion 3021 is the second surface 306. The interface between the first surface 305 and the second surface 306 corresponds to the location with the largest cross-sectional dimension of the first defining portion 303. For example, the location with the largest cross-sectional dimension of the first defining portion 303 has a strong blocking capability and can effectively block at least one film layer in the light-emitting functional layer 202.

[0094] For example, as shown in Figure 2, the position where the cross-sectional dimension of the first limiting portion 303 is largest is farther away from the substrate 10 than the surface of the light-emitting functional layer 202 on the side away from the substrate 10, so that at least one film layer in the light-emitting functional layer 202 can be effectively isolated by the isolation portion 304 of the first limiting portion 303.

[0095] For example, as shown in FIG2 , the hole transport layer 2021 and the electron transport layer 2023 in the light-emitting functional layer 202 are both separated by the isolation portion 304 of the first defined portion 303, but the embodiments of the present disclosure are not limited thereto. For example, one of the hole transport layer 2021 and the electron transport layer 2023 in the light-emitting functional layer 202 is separated by the isolation portion 304 of the first defined portion 303, but the present disclosure is not limited thereto.

[0096] For example, as shown in Figure 2, the orthographic projection of the second surface 306 of the second sub-defining portion 3022 on the base substrate 10 is completely located within the orthographic projection of the first surface 305 of the first sub-defining portion 3021 on the base substrate 10, so that the size of the first surface 305 in the second direction Y is not less than the size of the second surface 306 in the second direction Y, so that the edge of the first surface 305 in the second direction Y can protrude as much as possible from the first defining portion 303, so that the isolation portion 304 of the first defining portion 303 has good isolation capability, but the embodiments of the present disclosure are not limited to this.

[0097] FIG3 is a cross-sectional view of another display substrate provided by at least one embodiment of the present disclosure; FIG4 is a cross-sectional view of yet another display substrate provided by at least one embodiment of the present disclosure.

[0098] For example, as shown in FIG3 , display substrate 02 differs from display substrate 01 in the structure of the first defining portion. The remaining structures are identical or similar and are not repeated here. In display substrate 02, the dimensions of first surface 305 in the second direction Y are larger than the dimensions of second surface 306 in the second direction Y, and at least a portion of first surface 305 near the edge is exposed outside second sub-defining portion 3022 . This results in sharp corners on both sides of first sub-defining portion 3021, effectively blocking at least one film layer in light-emitting functional layer 202 .

[0099] For example, as shown in FIG4 , the difference between display substrate 03 and display substrate 01 lies in the structure of the first defining portion. The remaining structures are identical or similar and are not repeated here. In display substrate 03, the first sub-defining portion 3021 and the second sub-defining portion 3022 are offset from each other by a certain distance in the second direction Y. This allows at least a portion of the first surface 305 of the first sub-defining portion 3021, near the edge, to be exposed outside the second sub-defining portion 3022, and at least a portion of the second surface 306 of the second sub-defining portion 3022, near the edge, to be exposed outside the first sub-defining portion 3021. As a result, both the first sub-defining portion 3021 and the second sub-defining portion 3022 have distinct sharp corners, thereby effectively blocking at least one film layer in the light-emitting functional layer 202.

[0100] For example, in some embodiments of the present disclosure, at least one edge of the first defining portion 303 may have an obvious sharp corner so that the light-emitting functional layer 202 between adjacent light-emitting elements 200 can be blocked, and the embodiments of the present disclosure are not limited to this.

[0101] For example, as shown in FIG2 , the cross section of the first defining portion 303 includes a side edge located between the maximum cross-sectional dimension and the base substrate 10 , and the angle α between at least a portion of the side edge and the second direction Y is 95° to 105°. The maximum dimension of the first sub-defining portion 3021 in the first direction X is 0.7 μm to 1 μm. For example, the cross section of the first defining portion 303 includes a side line located on the side of the maximum cross-sectional dimension away from the base substrate 10 , and the angle between the tangent line connecting the side line and the maximum cross-sectional dimension and the second direction Y is 35° to 45°. The maximum dimension of the second sub-defining portion 3022 in the first direction X is 1.15 μm to 1.25 μm.

[0102] For example, as shown in FIG2 , the cross-section of the first sub-defining portion 3021 is an inverted trapezoid, and the angle between the side of the trapezoid and the second direction Y is 95° to 105°. The side line of the cross-section of the second sub-defining portion 3022 away from the base substrate 10 is arc-shaped, and the end of the side line is located at the isolation portion 304. For example, the tangent line of the side line to the point where the cross-sectional dimension is maximum can be the tangent line of the line connecting the side line and the edge of the interface between the first surface 305 and the second surface 306, but is not limited thereto. For example, the angle α between the side of the cross-section of the first defining portion 303 located between the point where the cross-sectional dimension is maximum and the base substrate 10 and the second direction Y can be at least one of 95° to 100°, 98° to 103°, 96° to 102°, and 97° to 104°, but is not limited thereto. For example, the maximum dimension of the first sub-defining portion 3021 in the first direction X may be at least one of 0.7 μm to 0.9 μm, 0.8 μm to 0.9 μm, and 0.75 μm to 0.85 μm, but is not limited thereto. For example, the angle between the second direction Y and a tangent line connecting the edge of the cross-section of the first defining portion 303 on the side of the cross-section at the maximum dimension away from the base substrate 10 and the maximum dimension may be at least one of 35° to 40°, 37° to 43°, and 38° to 41°, but is not limited thereto. For example, the maximum dimension of the second sub-defining portion 3022 in the first direction X may be at least one of 1.18 μm to 1.20 μm, 1.17 μm to 1.23 μm, 1.19 μm to 1.25 μm, and 1.20 μm to 1.24 μm, but is not limited thereto.

[0103] For example, as shown in FIG2 , the maximum dimension of the first defining portion 303 in the second direction Y can be 13 μm to 19 μm, for example, at least one of 14 μm to 19 μm, 13 μm to 18 μm, 14 μm to 18 μm, 15 μm to 17 μm, and 14 μm to 15 μm, but not limited thereto. For example, in some embodiments, a plurality of first defining portions 303 , for example, 2 to 4, but not limited thereto, can be provided between the light-emitting regions of two adjacent light-emitting elements 200 , thereby further enhancing the isolation effect of at least one film layer in the light-emitting functional layer 202 .

[0104] Such a setting can make at least one film layer in the light-emitting functional layer 202 of adjacent sub-pixels 20 disconnected at the isolation portion 304 of the first limiting portion 303, reducing the risk of crosstalk between adjacent sub-pixels 20, and can also make the second electrodes 203 of at least some of the adjacent sub-pixels 20 continuously arranged at the edge of the separation portion 304, which is beneficial to improving display uniformity.

[0105] For example, as shown in FIG2 , the second electrode 203 of at least some of the light-emitting elements 200 includes a portion extending along the second direction Y and another portion extending in the first direction X. For example, a defining portion 302 is provided between the light-emitting areas of two adjacent light-emitting elements 200. The second electrode 203 includes a portion located on a side of the first electrode 201 away from the base substrate 10 and a side of the defining portion 302 away from the base substrate 10. Because these two portions are provided continuously, at least a portion of the second electrode 203 extends along the first direction X. For example, the second electrode 203 may be provided as a whole layer and have an integrated structure, but is not limited thereto.

[0106] For example, as shown in FIG2 , two adjacent sub-pixels 20 arranged along the second direction Y are configured to emit light of different colors, and a first defining portion 303 is provided between the two adjacent sub-pixels 20. For example, the first defining portion 303 is located between the two light-emitting elements 200 of the two adjacent sub-pixels 20, thereby blocking at least one film layer in the light-emitting functional layer 202, thereby reducing the risk of crosstalk and color mixing between the sub-pixels 20 emitting light of different colors.

[0107] For example, as shown in FIG. 2 , the first defining portion 303 is adjacent to the light emitting elements 200 on both sides thereof, and the first defining portion 303 at least partially overlaps with the light emitting elements 200 .

[0108] For example, as shown in Figure 2, the first defining portion 303 is located between the light-emitting areas of the light-emitting elements 200 of two adjacent sub-pixels 20, and the orthographic projection of the first defining portion 303 on the base substrate 10 overlaps with the orthographic projection of the first electrodes 201 of the light-emitting elements 200 of the two adjacent sub-pixels 20 on the base substrate 10. This arrangement can reduce the spacing between adjacent sub-pixels 20, resulting in a more compact arrangement of the sub-pixels 20 in the display substrate 01, and helps expand the area of ​​the light-emitting area of ​​the light-emitting elements 200, thereby improving the light extraction efficiency of the light-emitting elements 200.

[0109] For example, as shown in FIG2 , the hole transport layer 2021, the light emitting layer 2022, and the electron transport layer 2023 in the light emitting element 200 are all blocked by the isolation portion 304. The orthographic projection of the portion of the light emitting functional layer 202 of the light emitting element 200 located in the opening 301 on the substrate 10 at least partially overlaps with the orthographic projection of the first sub-defining portion 3021 surrounding the opening 301 on the substrate 10. For example, when at least one film layer in the light emitting functional layer 202 is blocked, a portion of the film layer is located in the opening 301, and the orthographic projection of the edge of the portion close to the first defining portion 303 on the substrate 10 overlaps with the orthographic projection of the first defining portion 303 on the substrate 10. For example, the edge portion of the portion of the film layer close to the first defining portion 303 may be located on the side of the side between the isolation portion 304 of the first defining portion 303 and the substrate substrate close to the substrate 10.

[0110] Therefore, by making the cross-sectional dimension of the first limiting portion 303 first increase and then decrease in the second direction Y, and the maximum position of the cross-sectional dimension is located at the partition portion 304 of the first limiting portion 303, it is beneficial to locate the edge portion of the blocked film layer in the light-emitting functional layer 202 outside the emission range of the light-emitting element 200, so as to reduce the impact on the light extraction efficiency of the light-emitting element 200.

[0111] For example, as shown in FIG. 2 , a surface 3023 of the second sub-defining portion 3022 on a side away from the base substrate 10 includes a curved surface that curves toward a side away from the base substrate 10 , but the embodiments of the present disclosure are not limited thereto.

[0112] FIG5 is a cross-sectional view of another display substrate provided by at least one embodiment of the present disclosure.

[0113] For example, the display substrate shown in FIG5 differs from display substrate 01 in that the structure of the second sub-defining portion 3022 in the first defining portion 303 is different. The remaining structures are the same or similar and are not repeated here. As shown in FIG5 , the surface 3023 of the second sub-defining portion 3022 on the side away from the base substrate 10 includes a flat surface parallel to the base substrate 10. For example, the cross-section of the second sub-defining portion 3022 cut by a plane perpendicular to the extension direction of the first defining portion 303 is trapezoidal, and the lower base of the trapezoid is closer to the base substrate 10 than the upper base. Of course, the embodiments of the present disclosure are not limited to this. For example, the shape of the second sub-defining portion 3022 can be set according to design requirements.

[0114] FIG6 is a partial plan view of a display substrate provided by at least one embodiment of the present disclosure.

[0115] For example, as shown in FIG6 , a plurality of sub-pixels 20 include a plurality of first-color sub-pixels 21, a plurality of second-color sub-pixels 22, and a plurality of third-color sub-pixels 23. The plurality of sub-pixels 20 are arranged into a plurality of first sub-pixel groups 212 and a plurality of second sub-pixel groups 213, which are arranged alternately along a first arrangement direction Y. The first sub-pixel groups 212 include first-color sub-pixels 21 and second-color sub-pixels 22, which are arranged alternately along a second arrangement direction Y. The second sub-pixel groups 213 include third-color sub-pixels 23, which are arranged along the second arrangement direction Y. The first arrangement direction X intersects the second arrangement direction Y. For example, the first arrangement direction may be the X direction shown in FIG2 , and the second arrangement direction may be the Y direction shown in FIG2 . The first arrangement direction and the second arrangement direction may be interchangeable. For ease of illustration, the first arrangement direction and the first direction are numbered the same, and the second arrangement direction and the second direction are numbered the same. For example, the angle between the first arrangement direction and the second arrangement direction may be 80 to 120 degrees. For example, the first arrangement direction is perpendicular to the second arrangement direction. For example, the pixel arrangement shown in FIG6 may be a blue diamond pixel arrangement. Of course, the embodiments of the present disclosure are not limited thereto, and may also be other pixel arrangements, such as a triangular arrangement, a herringbone arrangement, a mosaic arrangement, and the like.

[0116] For example, as shown in FIG6 , the first subpixel group 212 and the second subpixel group 213 are staggered in the second arrangement direction Y, and each first color subpixel 21 in at least some of the first color subpixels 21 is surrounded by eight subpixels, which include alternating third color subpixels 23 and second color subpixels 22. For example, four third color subpixels 23 are respectively arranged at angular directions of 45°, 135°, 225°, and 315° from the center of the light-emitting area of ​​the first color subpixel 21.

[0117] For example, as shown in FIG2 and FIG6 , a first limiting portion 303 is provided between adjacent sub-pixels 20 to block at least one film layer in the light-emitting functional layer 202 between adjacent sub-pixels 20 to reduce the risk of crosstalk and color mixing.

[0118] For example, as shown in Figures 2 and 6, the orthographic projection of the first limiting portion 303 surrounding the opening 301 of the sub-pixel 20 on the base substrate 10 is a closed ring. This arrangement allows the light-emitting functional layer 202 of the sub-pixel 20 to be blocked in the circumferential direction to reduce the risk of crosstalk and color mixing with adjacent sub-pixels 20. For example, the display substrate further includes a plurality of spacers 220, which are located between two adjacent second sub-pixel groups 213 and between adjacent first color sub-pixels 21 and second color sub-pixels 22 in the second arrangement direction Y. For example, each spacer 220 surrounds two adjacent third color sub-pixels 23 in the first arrangement direction X and adjacent first color sub-pixels 21 and second color sub-pixels 22 in the second arrangement direction Y, but is not limited thereto.

[0119] FIG7 is a partial plan view of another display substrate provided by at least one embodiment of the present disclosure. The display substrate shown in FIG7 differs from the display substrate shown in FIG6 in that the arrangement of the multiple sub-pixels is different. The base substrate, pixel-defining pattern, and light-emitting elements in the display substrate shown in FIG7 may have the same features as the base substrate, pixel-defining pattern, and light-emitting elements in the display substrate shown in FIG6, and will not be further described here.

[0120] For example, as shown in FIG7 , the plurality of sub-pixels 20 includes a plurality of first-color sub-pixels 21, a plurality of second-color sub-pixels 22, and a plurality of third-color sub-pixels 23. The plurality of sub-pixels 20 includes a plurality of pixel units arranged in an array along a first arrangement direction X and a second arrangement direction Y. Each pixel unit includes one first-color sub-pixel 21, one second-color sub-pixel 22, and one third-color sub-pixel 23. In each pixel unit, the second-color sub-pixels 22 and the third-color sub-pixels 23 are alternately arranged along the first arrangement direction X, and the first-color sub-pixels 21 and the third-color sub-pixels 23 are alternately arranged along the second arrangement direction Y.

[0121] For example, as shown in Figure 7, one of the first color sub-pixel 21 and the second color sub-pixel 22 can be a red sub-pixel that emits red light, the other can be a blue sub-pixel that emits blue light, and the third color sub-pixel 23 can be a green sub-pixel that emits green light. For example, the first color sub-pixel 21 is a blue sub-pixel, and the second color sub-pixel 22 is a red sub-pixel. Of course, the colors of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel can be interchangeable. For example, the area of ​​the light-emitting area of ​​the blue sub-pixel is larger than the area of ​​the light-emitting area of ​​the green sub-pixel, and the area of ​​the light-emitting area of ​​the green sub-pixel is larger than the area of ​​the light-emitting area of ​​the red sub-pixel. Of course, the embodiments of the present disclosure are not limited to this, and the area size of the light-emitting area of ​​each color sub-pixel can be set according to actual product requirements.

[0122] For example, as shown in FIG7 , the first arrangement direction may be the X direction shown in FIG2 , and the second arrangement direction may be the Y direction shown in FIG2 . The first arrangement direction and the second arrangement direction may be interchangeable. Here, for ease of illustration, the first arrangement direction and the first direction are labeled the same, and the second arrangement direction and the second direction are labeled the same. For example, the pixel arrangement shown in FIG7 may be a realRGB pixel arrangement.

[0123] For example, as shown in Figures 2 and 7 , the orthographic projection of the first defining portion 303 surrounding the opening 301 of the sub-pixel 20 on the base substrate 10 is a closed ring. This configuration allows the light-emitting functional layer 202 of the sub-pixel 20 to be blocked in the circumferential direction, thereby reducing the risk of crosstalk and color mixing with adjacent sub-pixels 20.

[0124] FIG8 is a cross-sectional view of another display substrate provided by at least one embodiment of the present disclosure; FIG9 is a cross-sectional view of yet another display substrate provided by at least one embodiment of the present disclosure.

[0125] For example, as shown in Figures 8 and 9, both display substrates 04 and 05 include a base substrate 10 and a plurality of sub-pixels 20. The plurality of sub-pixels 20 are located on the base substrate 10, and at least some of the sub-pixels 20 each include a light-emitting element 200. The light-emitting element 200 includes a light-emitting functional layer 202, and a first electrode 201 and a second electrode 203 located on either side of the light-emitting functional layer 202 along a first direction X. The first electrode 201 is located between the light-emitting functional layer 202 and the base substrate 10. A pixel-defining pattern 30 includes a plurality of openings 301 and a defining portion 302 surrounding the plurality of openings 301. At least a portion of the light-emitting element 200 is located within the openings 301. The defining portion 302 includes a first defining portion 303 located between adjacent light-emitting elements 200. The cross-sectional dimensions of the first defining portion 303, as measured by a plane, along a second direction Y. The plane and the second direction Y are both perpendicular to the extension direction of the first defining portion 303, and the second direction Y is perpendicular to the first direction X. Along the first direction X, the cross-sectional dimension first increases and then decreases, and the maximum position of the cross-sectional dimension is located at the partition 304 of the first limiting portion 303 , and at least one layer of the light-emitting functional layer 202 is disconnected at the edge of the partition 304 toward the light-emitting element 200 .

[0126] For example, as shown in Figures 8 and 9, the second electrodes 203 of adjacent sub-pixels 20 are disconnected at the edge of the separator 304, thereby making the display substrate more controllable during manufacturing, reducing the risk of crosstalk and color mixing between adjacent sub-pixels 20, and simplifying the display substrate manufacturing process. It should be noted that even if the second electrodes 203 of adjacent sub-pixels 20 are disconnected at the edge of the separator 304 of the first defining portion 303, the other portions of the second electrodes 203 of the adjacent sub-pixels 20 are connected to each other, allowing signal transmission between the second electrodes 203 of the adjacent sub-pixels 20. For example, as shown in Figures 8 and 9, the cross section of the first defining portion 303, as cut by the above plane, includes a side edge located between the maximum cross-sectional dimension and the base substrate 10, and the angle β between at least a portion of the side edge and the second direction Y is 100° to 110°. The maximum dimension of the first sub-defining portion 3021 in the first direction X is 1μm to 1.2μm.

[0127] For example, as shown in Figures 8 and 9, the cross-section of the first limiting portion 303 cut by the above-mentioned plane includes an edge line located on the side away from the base substrate 10 at the maximum cross-sectional size position, and the angle between the tangent line of the edge line and the connection point of the maximum cross-sectional size and the second direction Y is 35° to 45°, and the maximum size of the second sub-limiting portion 3022 in the first direction X is 0.9μm to 1.1μm.

[0128] For example, as shown in Figures 8 and 9, the maximum dimensions of the first sub-defining portion 3021 and the second sub-defining portion 3022 in the first direction X are both large, and the angle β between at least part of the above-mentioned side of the first defining portion 303 and the second direction Y is large, so that the first defining portion 303 has a strong blocking ability, which is beneficial to blocking the light-emitting functional layer 202 and the second electrode 203 of the sub-pixel 20 together.

[0129] For example, as shown in Figures 8 and 9, the angle β between at least a portion of the side of the first defining portion 303 and the second direction Y can be at least one of 100° to 105°, 102° to 105°, 104° to 106°, 107° to 109°, and 103° to 108°, but is not limited thereto. For example, the maximum dimension of the first sub-defining portion 3021 in the first direction X is at least one of 1.05 μm to 1.1 μm, 1.1 μm to 1.15 μm, and 1.15 μm to 1.2 μm, but is not limited thereto.

[0130] For example, as shown in Figures 8 and 9, the angle between the tangent line connecting the edge line of the cross section of the first defining portion 303 and the point of maximum cross section size and the second direction Y can be at least one of 35° to 40°, 36° to 42°, 37° to 43°, and 38° to 44°, but is not limited thereto. For example, the maximum dimension of the second sub-defining portion 3022 in the first direction X can be at least one of 0.95 μm to 1.05 μm, 0.95 μm to 1.10 μm, 0.98 μm to 1.08 μm, and 0.99 μm to 1.1 μm, but is not limited thereto.

[0131] For example, as shown in Figures 8 and 9, the defining portion 302 further includes a second defining portion 313, which is adjacent to the edge of the light-emitting area of ​​the light-emitting element 200, and the extending direction of the second defining portion 313 is the same as the extending direction of the first defining portion 303.

[0132] For example, as shown in Figures 8 and 9, the second defining portion 313 may not be used to isolate the light-emitting functional layer 202 and the second electrode 203 of the sub-pixel 20, but may surround a portion of the edge of the opening provided in the sub-pixel 20 and be used to define the light-emitting area of ​​the sub-pixel 20. For example, the first defining portion 303 and the second defining portion 313 surrounding the opening 301 of the same sub-pixel 20 are connected to each other, and their orthographic projection on the base substrate 10 is a closed ring.

[0133] For example, as shown in Figures 8 and 9 , in the first direction X, the second defining portion 313 is smaller than the first defining portion 303, and the second defining portion 313 is made of the same material as the second sub-defining portion 3022. For example, the side of the second defining portion 313, separated by a plane and located away from the base substrate 10, can be curved, with the curved side being relatively flat, and the plane being perpendicular to the extension direction of the second defining portion 313. For example, when the second defining portion 313 is made of the same material as the second sub-defining portion 3022, the second defining portion 313 can be disposed on the same layer as the second sub-defining portion 3022 and formed using the same patterning process, thereby simplifying the manufacturing process.

[0134] For example, as shown in Figures 8 and 9 , in the first direction X, the size of the second defining portion 313 is larger than the size of the second sub-defining portion 3022, thereby better defining the light-emitting area of ​​the light-emitting element 200. For example, in the first direction X, the size of the second defining portion 313 may be at least one of 1.2 to 1.8 times, 1.2 to 1.5 times, 1.3 to 1.6 times, and 1.4 to 1.7 times the size of the second sub-defining portion 3022, but is not limited thereto.

[0135] For example, as shown in Figures 8 and 9, the maximum dimension of the first limiting portion 303 in the second direction Y can be 5μm~9μm, for example, it can be at least one of 5μm~8μm, 5μm~7μm, 5.5μm~7.5μm, 6.5μm~8.5μm and 7.5μm~8.5μm, but is not limited to this.

[0136] For example, as shown in Figure 8, the edge of the light-emitting area of ​​at least part of the sub-pixels 20 includes a first edge adjacent to the first limiting portion 303, at least parts of the first edges of the light-emitting areas of two adjacent sub-pixels 20 are arranged opposite to each other, and the first limiting portions 303 respectively adjacent to the first edges of the light-emitting areas of the two adjacent sub-pixels 20 have a first gap between their orthographic projections on the base substrate 10.

[0137] For example, as shown in FIG8 , the first defining portion 3035 and the first defining portion 3036 are respectively adjacent to the first edges of the light emitting areas of two adjacent sub-pixels 20 , and a first interval between the orthographic projections of the first defining portion 3035 and the first defining portion 3036 on the base substrate 10 is L1.

[0138] For example, as shown in Figures 8 and 9, the edge of the light-emitting area 202 of at least part of the sub-pixels 20 also includes a second edge adjacent to the second limiting portion 313, and the second edge of the light-emitting area 202 of the sub-pixel 20 is at least partially opposite to the first edge of the light-emitting area of ​​the adjacent sub-pixel 20, and there is a second gap between the orthographic projections of the limiting portions adjacent to the respective oppositely arranged second edges and first edges on the base substrate 10.

[0139] For example, as shown in Figure 8, the second limiting portion 313 adjacent to the second edge of the light-emitting area of ​​the sub-pixel 20 is arranged opposite to the first limiting portion 3037 adjacent to the first edge of the light-emitting area of ​​the adjacent sub-pixel 20, and a second interval L2 is formed between the second limiting portion 313 and the first limiting portion 3037.

[0140] For example, as shown in Figure 8, the first interval L1 between the adjacent first defining portions 3035 and the first defining portions 3036 is conducive to causing at least one film layer of the light-emitting functional layer 202 and the second electrode 203 to be broken between the first defining portion 3035 and the first defining portion 3036; the second interval L2 between the second defining portion 313 and the first defining portion 3037 is conducive to causing at least one film layer of the light-emitting functional layer 202 and the second electrode 203 to be broken between the second defining portion 313 and the first defining portion 3037. Therefore, the setting of the first interval L1 and the second interval L2 is conducive to enhancing the breaking effect of at least one film layer of the light-emitting functional layer 202 and the second electrode 203, and reducing the risk of crosstalk between adjacent sub-pixels 20.

[0141] For example, as shown in FIG. 8 , in the arrangement direction of the sub-pixels 20 , the size of the first interval L1 is larger than the size of the second interval L2 .

[0142] For example, as shown in Figure 8, two adjacent sub-pixels 20 arranged along the second direction Y are configured to emit light of different colors. In order to reduce the risk of crosstalk between the two adjacent sub-pixels 20 that emit light of different colors, a first limiting portion 3035 and a first limiting portion 3036 can be arranged between the two adjacent sub-pixels 20, or a first limiting portion 3037 and a second limiting portion 313 can be arranged between the two adjacent sub-pixels 20.

[0143] For example, as shown in FIG8 , the edge of the light-emitting area 202 of the same sub-pixel 20 is formed by connecting a first edge and a second edge, and the first edge is adjacent to the first defining portion 303. Thus, when one of the two opposing edges of the light-emitting areas of two adjacent sub-pixels 20 includes a first edge, at least one film layer of the light-emitting functional layer 202 and the second electrode 203 between the two adjacent sub-pixels 20 can be disconnected, thereby reducing the risk of crosstalk. For example, when both opposing edges of the light-emitting areas of two adjacent sub-pixels 20 include a first edge, such as the first edge adjacent to the first defining portion 3035 and the first edge adjacent to the first defining portion 3036 in FIG8 , the disconnection effect of at least one film layer of the light-emitting functional layer 202 and the second electrode 203 between the two adjacent sub-pixels 20 is better, but the present invention is not limited thereto.

[0144] For example, as shown in Figure 8, when at least one film layer of the light-emitting functional layer 202 and the second electrode 203 are separated by the first edge of the first limiting portion 3035 and the first edge of the adjacent first limiting portion 3036, a portion of the film layer of at least one film layer of the light-emitting functional layer 202 or a portion of the second electrode 203 may also be located between the first limiting portion 3035 and the first limiting portion 3036, for example, may fall to the side of the structural layer 40 away from the base substrate 10, but is not limited to this.

[0145] Figure 10 is a partial plan view of a display substrate corresponding to Figure 8, provided in at least one embodiment of the present disclosure; Figure 11 is a partial plan view of yet another display substrate corresponding to Figure 8, provided in at least one embodiment of the present disclosure. For example, Figure 8 corresponds to the cross-sectional schematic diagrams taken with dashed lines in Figures 10 and 11, respectively.

[0146] For example, as shown in FIG10 , the plurality of sub-pixels include a plurality of first color sub-pixels 21, a plurality of second color sub-pixels 22, and a plurality of third color sub-pixels 23. The plurality of sub-pixels are arranged as a plurality of first sub-pixel groups 212 and a plurality of second sub-pixel groups 213, which are arranged alternately along a first arrangement direction Y. The first sub-pixel groups 212 include first color sub-pixels 21 and second color sub-pixels 22, which are arranged alternately along a second arrangement direction Y. The second sub-pixel groups 213 include third color sub-pixels 23 arranged along the second arrangement direction Y. The first arrangement direction X intersects the second arrangement direction Y. For example, the first arrangement direction can be the X direction shown in FIG2 , the second arrangement direction can be the Y direction shown in FIG2 , and the first arrangement direction can be interchangeable with the second arrangement direction. For example, the pixel arrangement shown in FIG10 can be the same as the pixel arrangement shown in FIG6 . For details, please refer to the relevant description of the above embodiment. For example, compared to the display substrate shown in FIG6 , the structure of the defining portion 303 provided on the circumference of the light-emitting area of ​​the sub-pixel in the display substrate shown in FIG10 is different.

[0147] For example, as shown in Figures 8 and 10, the orthographic projection of the first defining portion 303 surrounding the opening 301 of the pixel defining pattern on the base substrate 10 is an open ring, and the second electrodes 203 of adjacent light-emitting elements 200 are at least partially connected at the gap of the open ring.

[0148] For example, as shown in FIG8 and FIG10 , the projection of the light-emitting area of ​​each sub-pixel 20 on the substrate 10 is substantially rectangular, and the circumferential size of the first edge of the light-emitting area 202 of each sub-pixel 20 is greater than the circumferential size of the second edge. As a result, the orthographic projection area of ​​the first defining portion 303 proximate to the edge of the light-emitting area 202 of the sub-pixel 20 on the substrate 10 is greater than the orthographic projection area of ​​the second defining portion 313 proximate to the edge of the light-emitting area 202 of the sub-pixel 20 on the substrate 10. For example, the orthographic projection area of ​​the first defining portion 303 proximate to the edge of the light-emitting area 202 of the sub-pixel 20 on the substrate 10 is 2.5 to 3.5 times, for example, 3 times, 3.2 times, or 3.5 times, but is not limited thereto. For example, the orthographic projection of the first defining portion 303 surrounding the opening 301 on the base substrate 10 is U-shaped, and the opening direction of the U-shaped portion is the M direction shown in FIG10 . For example, the M direction may be a direction 45°-50° with respect to the first arrangement direction X, but is not limited thereto. The N direction intersects the M direction; for example, the angle between the N direction and the M direction may be 80-120 degrees, and the N direction is perpendicular to the M direction.

[0149] For example, as shown in Figures 8 and 10, in the N direction, adjacent and opposing edges of the light-emitting areas 202 of two adjacent sub-pixels 20 are each provided with a first defining portion 303, and a first distance exists between adjacent first defining portions 303. In the M direction, adjacent and opposing edges of the light-emitting areas 202 of two adjacent sub-pixels 20 are each provided with a first defining portion 303 and a second defining portion 313, and a second distance exists between the first defining portion 303 and the second defining portion 313. For example, the second electrode 203 of the light-emitting element 200 is provided with a second defining portion 313 at the aforementioned open annular notch. The second electrode 203 of the light-emitting element 200 of each sub-pixel 20 is continuously provided at the second defining portion 313 and is connected to the second electrode 203 of the adjacent sub-pixel 20. Thus, the second electrodes 203 of multiple sub-pixels 20 may be connected as a whole, but is not limited thereto.

[0150] For example, the display substrate shown in FIG11 differs from the display substrate shown in FIG10 in that the arrangement of the multiple sub-pixels is different. For example, the arrangement of the multiple sub-pixels in the display substrate shown in FIG11 may be the same as the arrangement of the multiple sub-pixels in the display substrate shown in FIG7 , but is not limited thereto.

[0151] For example, as shown in FIG11 , the plurality of sub-pixels 20 includes a plurality of first-color sub-pixels 21, a plurality of second-color sub-pixels 22, and a plurality of third-color sub-pixels 23. The plurality of sub-pixels 20 includes a plurality of pixel units arranged in an array along a first arrangement direction X and a second arrangement direction Y. Each pixel unit includes one first-color sub-pixel 21, one second-color sub-pixel 22, and one third-color sub-pixel 23. In each pixel unit, the second-color sub-pixels 22 and the third-color sub-pixels 23 are alternately arranged along the first arrangement direction X, and the first-color sub-pixels 21 and the third-color sub-pixels 23 are alternately arranged along the second arrangement direction Y, with the first arrangement direction X and the second arrangement direction Y intersecting.

[0152] For example, as shown in Figures 8 and 11 , the orthographic projection of the first defining portion 303 surrounding the opening 301 of the pixel defining pattern on the base substrate 10 is "U"-shaped, and the opening directions of the "U" shapes are the same, both oriented in the Y direction shown in Figure 11 . In the X direction, adjacent and opposing edges of the light-emitting areas 202 of two adjacent sub-pixels 20 are each provided with a first defining portion 303, and a first distance exists between adjacent first defining portions 303. In the Y direction, adjacent and opposing edges of the light-emitting areas 202 of two adjacent sub-pixels 20 are each provided with a first defining portion 303 and a second defining portion 313, and a second distance exists between each first defining portion 303 and each second defining portion 313. For example, a second limiting portion 313 is provided at the above-mentioned non-closed annular gap, and the second electrode 203 of the light-emitting element 200 of the sub-pixel 20 is connected to the second electrode 203 of the adjacent sub-pixel 20 at the second limiting portion 313 at the annular gap, so that the second electrodes 203 of multiple sub-pixels 20 can be connected as one, but is not limited to this.

[0153] Figure 12 is a partial plan view of yet another display substrate according to at least one embodiment of the present disclosure, corresponding to Figure 8 ; Figure 13 is a partial plan view of yet another display substrate according to at least one embodiment of the present disclosure, corresponding to Figure 8 . For example, Figure 8 corresponds to the cross-sectional schematic diagrams taken with dashed lines in Figures 12 and 13 , respectively.

[0154] For example, the arrangement of the multiple sub-pixels in the display substrate shown in FIG12 may be the same as the arrangement of the multiple sub-pixels in the display substrate shown in FIG10. For example, the display substrate shown in FIG12 differs from the display substrate shown in FIG10 in that the structure of the defining portion adjacent to the light-emitting area of ​​the sub-pixel is different.

[0155] For example, as shown in Figures 8 and 12 , the orthographic projection of the first defining portion 303 surrounding the opening 301 of the pixel defining pattern on the substrate 10 is "U"-shaped, and the opening directions of the "U" shapes are the same, both oriented in the N direction as shown in Figure 12 . In the M direction, adjacent and opposing edges of the light-emitting areas 202 of two adjacent sub-pixels 20 are each provided with a first defining portion 303, and a first distance exists between adjacent first defining portions 303. In the N direction, adjacent and opposing edges of the light-emitting areas 202 of two adjacent sub-pixels 20 are each provided with a first defining portion 303 and a second defining portion 313, and a second distance exists between the first defining portion 303 and the second defining portion 313. For example, the second defining portion 313 is provided at the aforementioned open annular notch, and the second electrode 203 of the light-emitting element 200 of each sub-pixel 20 is connected to the second electrode 203 of the adjacent sub-pixel 20 at the annular notch. Thus, the second electrodes 203 of the plurality of sub-pixels 20 may be connected as a whole, but is not limited thereto.

[0156] For example, the arrangement of the multiple sub-pixels in the display substrate shown in FIG13 may be the same as the arrangement of the multiple sub-pixels in the display substrate shown in FIG11. For example, the display substrate shown in FIG13 differs from the display substrate shown in FIG11 in that the structure of the defining portion adjacent to the light-emitting area of ​​the sub-pixel is different.

[0157] For example, as shown in FIG13 , the orthographic projection of the first defining portion 303 surrounding the opening 301 of the pixel defining pattern on the substrate 10 is a "U" shape, and the opening direction of the "U" shape may be different for different sub-pixels. For example, the orthographic projection of the first defining portion 303 of the first color sub-pixel 21 on the substrate 10 is oriented in the Y direction, while the orthographic projection of the first defining portion 303 of the second color sub-pixel 22 and the third color sub-pixel 23 located in the same column along the X direction is oriented in the X direction. However, this is not limited to these. For example, in the X direction, adjacent and opposing edges of the light-emitting areas of adjacent first color sub-pixels 21 are each provided with a first defining portion 303, with a first distance between adjacent first defining portions 303. Adjacent and opposing edges of the light-emitting areas 202 of adjacent second color sub-pixels 22 and third color sub-pixels 23 are each provided with a first defining portion 303 and a second defining portion 313, with a second distance between each first defining portion 303 and each second defining portion 313. For example, a second limiting portion 313 is provided at the above-mentioned non-closed annular gap, and the second electrode 203 of the light-emitting element 200 of the sub-pixel 20 is continuously provided at the second limiting portion 313 and connected to the second electrode 203 of the adjacent sub-pixel 20. Thus, the second electrodes 203 of multiple sub-pixels 20 can be connected as one, but is not limited to this.

[0158] For example, as shown in FIG9 , two adjacent sub-pixels 20 arranged along the second direction Y are configured to emit light of different colors. For example, one of the two opposite edges of the light-emitting areas of the two adjacent sub-pixels 20 includes a first edge, so that the light-emitting functional layer 202 and the second electrode 203 between the two adjacent sub-pixels 20 are disconnected to reduce the risk of crosstalk. For example, as shown in FIG9 , the first defining portion 3038 adjacent to the edge of the light-emitting area of ​​the same sub-pixel 20 is spaced apart from the second defining portion 3138 adjacent to the edge of the light-emitting area of ​​the adjacent sub-pixel, and the second defining portion 3139 adjacent to the edge of the light-emitting area of ​​the same sub-pixel 20 is spaced apart from the first defining portion 3039 adjacent to the edge of the light-emitting area of ​​the adjacent sub-pixel, but the present invention is not limited thereto.

[0159] Figure 14 is a partial plan view of a display substrate corresponding to Figure 9, provided in at least one embodiment of the present disclosure; Figure 15 is a partial plan view of yet another display substrate corresponding to Figure 9, provided in at least one embodiment of the present disclosure. For example, Figure 9 corresponds to the cross-sectional schematic diagrams taken with dashed lines in Figures 14 and 15, respectively.

[0160] For example, the arrangement of the multiple sub-pixels in the display substrate shown in FIG14 may be the same as the arrangement of the multiple sub-pixels in the display substrate shown in FIG10. For example, the display substrate shown in FIG14 differs from the display substrate shown in FIG10 in that the structure of the defining portion adjacent to the light-emitting area of ​​the sub-pixel is different.

[0161] For example, as shown in Figures 9 and 14 , the orthographic projection of the first defining portion 303 surrounding the opening 301 of the pixel defining pattern on the substrate 10 is V-shaped, and the openings of the V-shaped pattern are oriented in the same direction, namely, the X direction shown in Figure 14 . For example, in the M direction or the N direction, adjacent and opposing edges of the light-emitting areas 202 of two adjacent sub-pixels 20 are respectively provided with a first defining portion 303 and a second defining portion 313, and a second distance is provided between the first defining portion 303 and the second defining portion 313. For example, the second defining portion 313 is provided at the V-shaped opening, and the second electrode 203 of the light-emitting element 200 of the sub-pixel 20 is continuously provided at the second defining portion 313 and connected to the second electrode 203 of the adjacent sub-pixel 20. Thus, the second electrodes 203 of the plurality of sub-pixels 20 may be connected as a whole, but is not limited thereto.

[0162] Of course, the embodiments of the present disclosure are not limited to this. For example, the first limiting portion 303 of the opening 301 surrounding the pixel limiting pattern has a positive projection on the base substrate 10 in a "V" shape, and the opening direction of the "V" shape can also be the Y direction shown in Figure 14, which can be specifically set according to design requirements.

[0163] For example, the arrangement of the multiple sub-pixels in the display substrate shown in FIG15 may be the same as the arrangement of the multiple sub-pixels in the display substrate shown in FIG11. For example, the display substrate shown in FIG15 differs from the display substrate shown in FIG11 in that the structure of the defining portion adjacent to the light-emitting area of ​​the sub-pixel is different.

[0164] For example, as shown in Figures 9 and 15 , the orthographic projection of the first defining portion 303 surrounding the opening 301 of the pixel defining pattern on the base substrate 10 is "V"-shaped, and the opening direction of the "V" is the M direction shown in Figure 15 . For example, in the X direction or the Y direction, adjacent and opposing edges of the light-emitting areas 202 of two adjacent sub-pixels 20 are respectively provided with a first defining portion 303 and a second defining portion 313, and a second distance is provided between the first defining portion 303 and the second defining portion 313. For example, the second defining portion 313 is provided at the aforementioned "V"-shaped opening, and the second electrode 203 of the light-emitting element 200 of the sub-pixel 20 is at least partially connected to the second electrode 203 of the adjacent sub-pixel 20. Thus, the second electrodes 203 of the plurality of sub-pixels 20 may be connected as a whole, but is not limited thereto.

[0165] Of course, the embodiments of the present disclosure are not limited to this. For example, the first limiting portion 303 of the opening 301 surrounding the pixel limiting pattern has a positive projection on the base substrate 10 in a "V" shape, and the opening direction of the "V" shape can also be the N direction shown in Figure 15, which can be specifically set according to design requirements.

[0166] Figure 16 is a partial plan view of yet another display substrate according to at least one embodiment of the present disclosure, corresponding to Figure 9 ; Figure 17 is a partial plan view of yet another display substrate according to at least one embodiment of the present disclosure, corresponding to Figure 9 . For example, Figure 9 corresponds to the cross-sectional schematic diagrams taken with dashed lines in Figures 16 and 17 , respectively.

[0167] For example, the arrangement of the multiple sub-pixels in the display substrate shown in FIG16 may be the same as the arrangement of the multiple sub-pixels in the display substrate shown in FIG10. For example, the display substrate shown in FIG16 differs from the display substrate shown in FIG10 in that the structure of the defining portion adjacent to the light-emitting area of ​​the sub-pixel is different.

[0168] For example, as shown in Figures 9 and 16, the orthographic projection of the first defining portion 303 surrounding the same opening 301 on the base substrate 10 is in the shape of "=". For example, in the M direction or in the N direction, two adjacent and opposite edges of the light-emitting area of ​​the sub-pixel 20 are respectively provided with a first defining portion 303 and a second defining portion 313, and a second distance is provided between the first defining portion 303 and the second defining portion 313. For example, the second electrodes 203 of the light-emitting elements 200 of adjacent sub-pixels 20 are at least partially connected, so that the second electrodes 203 of multiple sub-pixels 20 can be connected as a whole, but the present invention is not limited thereto.

[0169] For example, the arrangement of the multiple sub-pixels in the display substrate shown in FIG17 may be the same as the arrangement of the multiple sub-pixels in the display substrate shown in FIG11. For example, the display substrate shown in FIG17 differs from the display substrate shown in FIG11 in that the structure of the defining portion adjacent to the light-emitting area of ​​the sub-pixel is different.

[0170] For example, as shown in FIG17 , the orthographic projection of the first defining portion 303 surrounding the same opening 301 on the substrate 10 is in the shape of an "=". For example, in the X direction, two opposing edges of the light-emitting area of ​​the third color sub-pixel 23 are respectively provided with a first defining portion 303. For example, in the Y direction, two adjacent and opposing edges of the light-emitting area of ​​the first color sub-pixel 21 and the second color sub-pixel 22 are respectively provided with a second defining portion 313, but the present invention is not limited thereto. For example, in the X direction, a first defining portion 303 and a second defining portion 313 are provided between the light-emitting areas of adjacent sub-pixels 20 (e.g., adjacent first color sub-pixels 21 and third color sub-pixels 23), and a second distance is provided between the first defining portion 303 and the second defining portion 313. For example, in the Y direction, adjacent and opposing edges of the light-emitting areas of adjacent sub-pixels 20 (e.g., adjacent first color sub-pixels 21 and second color sub-pixels 22) are both provided with a first defining portion 303, and a first distance is provided between adjacent first defining portions 303. For example, the second electrodes 203 of the light emitting elements 200 of adjacent sub-pixels 20 are at least partially connected to each other, so that the second electrodes 203 of the plurality of sub-pixels 20 may be connected as one, but the present invention is not limited thereto.

[0171] FIG18 is a cross-sectional view of yet another display substrate provided by at least one embodiment of the present disclosure.

[0172] As shown in FIG18 , the display substrate 06 includes a base substrate 10, a plurality of sub-pixels 20, and a pixel-defining pattern 30. The plurality of sub-pixels 20 are located on the base substrate 10. Each of at least some of the sub-pixels 20 includes a light-emitting element 200. The light-emitting element 200 includes a light-emitting functional layer 202 and a first electrode 201 and a second electrode 203 located on either side of the light-emitting functional layer 202 along a first direction X. The first electrode 201 is located between the light-emitting functional layer 202 and the base substrate 10. The pixel-defining pattern 30 includes a plurality of openings 301 and a defining portion 302 surrounding the plurality of openings 301. At least a portion of the light-emitting element 200 is located in the opening 301.

[0173] For example, as shown in FIG18 , the light-emitting functional layer 202 may include multiple film layers, such as a hole transport layer 2021, a light-emitting layer 2022, and an electron transport layer 2023, with the hole transport layer 2021 and the electron transport layer 2023 respectively located on either side of the light-emitting layer 2022. For example, the first electrode 201 may be an anode, and the second electrode 203 may be a cathode. For example, the anode may be formed of a transparent conductive material with a high work function, such as ITO (Indium Tin Oxide), but is not limited thereto. For example, the opening 301 of the pixel defining pattern 30 is configured to define a light-emitting region of the light-emitting element 200. For example, the light-emitting element 200 may include a portion located within the opening 301 and a portion overlapping the defining portion 302 in a direction perpendicular to the base substrate 10. For example, as shown in FIG18 , the opening 301 of the pixel defining pattern 30 is configured to expose the first electrode 201 of the light-emitting element 200, and the exposed first electrode 201 is at least partially in contact with the light-emitting functional layer 202 in the light-emitting element 200.

[0174] As shown in FIG18 , the display substrate 06 further includes a partition structure 50 located between the defining portions 302 adjacent to each of the two adjacent openings. The material of the partition structure 50 is different from that of the defining portions 302. For example, the two adjacent defining portions 302 are spaced apart and respectively surround the openings of the light-emitting regions of two adjacent sub-pixels. For example, the material of the defining portions 302 may include, but is not limited to, polyimide resin and propylene glycol methyl ether acetate. For example, in some embodiments, the material of the defining portions 302 may also include acrylic or polyethylene terephthalate. For example, the material of the partition structure 50 may include phenolic resin and propylene glycol methyl ether acetate, so that the partition structure 50 and defining portions 302 have minimal impact on each other during the manufacturing process. For example, when the partition structure 50 and defining portions 302 are formed using a wet etching process, the different materials of the partition structure 50 and defining portions 302 can achieve different etching selectivities, but is not limited to this.

[0175] As shown in FIG18 , the maximum dimension of a first side line 51 of a cross section of the partition structure 50 cut by a plane, away from the base substrate 10, in the second direction Y, is greater than the maximum dimension of a second side line 52 of the cross section, closer to the base substrate 10, in the second direction Y. The plane and the second direction Y are both perpendicular to the extension direction of the defining portion 302, and the second direction Y is perpendicular to the first direction X. For example, the surface of the partition structure 50 away from the base substrate 10 may not be an absolutely planar surface and may include, for example, a partially raised or recessed structure. Thus, the corresponding first side line 51 may not be an absolutely straight line and may, for example, include a partially curved line. This is not limited in the embodiments of the present disclosure.

[0176] As shown in FIG18 , between at least two adjacent light-emitting elements 200, at least one layer of the light-emitting functional layer 202 is disconnected at the edge of the partition structure 50, and at least a portion of the second electrode 203 corresponding to at least one light-emitting element 200 extends from the light-emitting region of the light-emitting element 200 to the light-emitting region of at least one adjacent light-emitting element 200. For example, between at least two adjacent light-emitting elements 200, the second electrode 203 corresponding to at least one light-emitting element 200 may be a portion connected to the second electrode 203 of at least one adjacent light-emitting element 200, such that the second electrode 203 covering the light-emitting region of the at least one light-emitting element 200 is integrally connected to the second electrode 203 covering the light-emitting region of the at least one adjacent light-emitting element 200. For example, as shown in FIG18 , the second electrode 203 of the at least one light-emitting element 200 may further include another portion disconnected at the edge of the partition structure 50, and the other portion is disconnected toward the edge of the light-emitting element 200.

[0177] For example, as shown in FIG18 , the cross-section of the partition structure 50 as cut by the plane is trapezoidal, with the upper base of the trapezoid closer to the base substrate 10 than the lower base. For example, the first edge 51 and the second edge 52 of the cross-section of the partition structure 50 as cut by the plane, both distal to the base substrate 10, extend along the second direction Y, and the side edge between the first edge 51 and the second edge 52 forms a sharp angle μ with the first edge 51. For example, the angle μ can be 30° to 65°, such as, but not limited to, at least one of 30° to 60°, 40° to 50°, 45° to 55°, and 35° to 50°. For example, the first edge 51 can have different angles with the side edges on either side of it, and the specific angles can be set according to design requirements. This ensures that the partition structure 50 has good isolation capabilities for at least one layer of the light-emitting functional layer 202 and the second electrode 203.

[0178] For example, as shown in FIG18 , a partition structure 50 is provided between two defining portions 302 located between adjacent sub-pixels 20, and the partition structure 50 is spaced apart from the two defining portions 302, thereby further enhancing the isolation effect on at least one layer of the light-emitting functional layer 202 and the second electrode 203. However, the embodiments of the present disclosure are not limited thereto. For example, there may be multiple partition structures 50 provided between two adjacent defining portions 302 to enhance the isolation capability of at least one layer of the light-emitting functional layer 202 and the second electrode 203, and the specific number may be determined according to design requirements.

[0179] In the embodiment of the present disclosure, by disposing a partition structure 50 between two defining portions 302 between adjacent sub-pixels 20, and making the dimension of the first side line 51 in the second direction Y larger than the dimension of the second side line 52 in the second direction Y, at least one film layer in the light-emitting functional layer 202 can be effectively partitioned, thereby reducing the probability of crosstalk between two adjacent sub-pixels and the phenomenon of reduced sub-pixel brightness. When the luminous colors of adjacent sub-pixels are different, the risk of color mixing on the display substrate is reduced. In addition, the material of the partition structure 50 is different from that of the defining portion 302, which can reduce the mutual influence between the partition structure 50 and the defining portion 302 during the manufacturing process, thereby facilitating the manufacturing process. Moreover, since the isolation structure 50 is disposed between adjacent sub-pixels 20, it is also convenient to adjust the size of the isolation structure 50 in a timely manner according to different design requirements. For example, when the size of the isolation structure 50 needs to be changed (for example, the height of the isolation structure 50 along the first direction X needs to be increased), the size of the isolation structure 50 can be adjusted separately, which is simple to operate and has little impact on other structures in the display substrate.

[0180] For example, as shown in FIG18 , a cross section of the partition structure 50 cut by the plane includes a side edge located between the maximum cross-sectional dimension and the base substrate 10 . The angle μ between at least a portion of the side edge and the second direction Y is between 95° and 105°. The maximum dimension of the partition structure 50 in the first direction X is between 0.7 μm and 1 μm. A cross section of the defining portion 302 cut by the plane includes a third side edge 53 away from the base substrate 10 . The angle between at least a portion of a tangent to the third side edge 53 and the second direction Y is between 35° and 45°. The maximum dimension of the defining portion 302 in the first direction X is between 1.15 μm and 1.25 μm.

[0181] For example, as shown in FIG18 , the cross-section of the partition structure 50 as cut by the plane is trapezoidal, the cross-section of the defining portion 302 as cut by the plane is semicircular, and the maximum dimension of the partition structure 50 in the first direction X is smaller than the maximum dimension of the defining portion 302 in the first direction X. For example, the maximum dimension of the partition structure 50 in the first direction X may be at least one of 0.7 μm to 0.9 μm, 0.8 μm to 0.9 μm, 0.75 μm to 0.85 μm, and 0.80 μm to 0.95 μm, but is not limited thereto. For example, the maximum dimension of the defining portion 302 in the first direction X may be at least one of 1.15 μm to 1.20 μm, 1.17 μm to 1.19 μm, 1.18 μm to 1.24 μm, and 1.19 μm to 1.23 μm, but is not limited thereto. For example, the angle μ between at least a portion of the side of the partition structure 50 located between the maximum cross-sectional dimension and the base substrate 10 in the cross-section cut by the plane and the second direction Y can be at least one of 95° to 100°, 96° to 102°, 97° to 103°, and 98° to 104°, but is not limited thereto. For example, the angle between the tangent line of the third side line 53 in the cross-section cut by the plane and the second direction Y can be at least one of 35° to 40°, 36° to 44°, 38° to 43°, and 37° to 42°, but is not limited thereto.

[0182] For example, as shown in FIG18 , the maximum dimension of the partition structure 50 in the second direction Y can be 3 μm to 6 μm, for example, at least one of 3 μm to 5 μm, 4 μm to 6 μm, 4 μm to 5 μm, and 3 μm to 4 μm, but not limited thereto. For example, in the second direction, the distance between the partition structure 50 and the adjacent light-emitting area can be 4 μm to 7 μm, for example, at least one of 4 μm to 6 μm, 5 μm to 7 μm, 4.5 μm to 6.5 μm, 5.5 μm to 6 μm, and 5.5 μm to 7 μm, but not limited thereto. For example, in some embodiments, the distances between the partition structure 50 and two adjacent light-emitting areas can be the same or different, and can be set specifically according to design requirements, and the embodiments of the present disclosure are not limited thereto.

[0183] By setting the maximum dimension of the partition structure 50 in the first direction X and the maximum dimension of the limiting portion 302 in the first direction X within the above-mentioned appropriate range, and making the above-mentioned angle μ corresponding to the partition structure 50 and the angle between the tangent line 53 corresponding to the third side line 53 of the limiting portion 302 and the second direction Y match each other, the partition structure 50 can effectively isolate at least one layer of the light-emitting functional layer 202 and the second electrode 203, which is beneficial to reducing the risk of crosstalk between adjacent sub-pixels.

[0184] For example, as shown in FIG18 , the orthographic projection of the partition structure 50 on the base substrate may not overlap with the orthographic projection of the adjacent limiting portion 302 on the base substrate, or may have a smaller overlapping area, which is not limited in the embodiments of the present disclosure.

[0185] For example, as shown in Figures 2, 8, 9 and 18, in the second direction Y, the distance between two adjacent light-emitting areas can be 14μm to 20μm, for example, it can be at least one of 14μm to 19μm, 15μm to 17μm, 16μm to 18μm, 17μm to 19μm, 16μm to 17μm and 14μm to 18μm, but is not limited to this.

[0186] For example, as shown in Figures 2, 8, 9 and 18, in some actual products, the boundary between the first limiting sub-portion and the second limiting sub-portion in the first limiting portion 303 may not be very obvious, so that the first limiting portion 303 can be visually an integral structure, but is not limited to this.

[0187] Figure 19 is a partial plan view of a display substrate corresponding to Figure 18, provided in at least one embodiment of the present disclosure; Figure 20 is a partial plan view of yet another display substrate corresponding to Figure 18, provided in at least one embodiment of the present disclosure. For example, Figure 18 corresponds to the cross-sectional schematic diagrams taken with dashed lines in Figures 19 and 20, respectively.

[0188] For example, the arrangement of the multiple sub-pixels in the display substrate shown in FIG19 may be the same as the arrangement of the multiple sub-pixels in the display substrate shown in FIG10 . For example, the display substrate shown in FIG19 differs from the display substrate shown in FIG10 in that the structural form of the defining portion adjacent to the light-emitting area of ​​the sub-pixel is different. For example, the arrangement of the multiple sub-pixels in the display substrate shown in FIG20 may be the same as the arrangement of the multiple sub-pixels in the display substrate shown in FIG11 . For example, the display substrate shown in FIG20 differs from the display substrate shown in FIG11 in that the structural form of the defining portion adjacent to the light-emitting area of ​​the sub-pixel is different.

[0189] For example, as shown in Figures 19 and 20, the light-emitting area of ​​each sub-pixel 20 is surrounded by four partition structures 50. A partition structure 50 is provided between the defining portions adjacent to the mutually opposing edges of two adjacent sub-pixels. For example, the extension direction of the partition structure 50 is at least partially the same as the extension direction of the defining portion 302 adjacent to it, but is not limited thereto. For example, the orthographic projections of the four partition structures 50 surrounding the light-emitting area of ​​the sub-pixel 20 on the base substrate 10 are in the form of an open ring, and the second electrodes of adjacent sub-pixels 20 are connected at the openings of the open ring so that the second electrodes of adjacent sub-pixels 20 have continuity.

[0190] At least one embodiment of the present disclosure further provides a display device comprising any of the above-mentioned display substrates.

[0191] Figure 21 is a schematic diagram of a display device provided by one embodiment of the present disclosure. As shown in Figure 21 , the display device 500 includes a display substrate 100. Display substrate 100 is any of the display substrates described above. Therefore, the technical effects of the aforementioned display substrates can also be realized in this display device and will not be further elaborated here.

[0192] The display substrate mentioned in the embodiments of the present disclosure may also be referred to as a display panel. For example, the display substrate may be a flexible display substrate, but is not limited thereto. For example, the display device 500 may 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, or navigation system, including such a display device. The embodiments of the present disclosure include but are not limited to these.

[0193] FIG22 is a spectrum diagram of a display substrate provided by an embodiment of the present disclosure.

[0194] For example, as shown in FIG22, in the low grayscale driving state corresponding to the green sub-pixel, when the display substrate shown in FIG1 is used, relatively obvious red light spectral energy appears in the spectral distribution, indicating that crosstalk occurs between the green sub-pixel and the red sub-pixel, and the green sub-pixel leaks electricity into the adjacent red sub-pixel, causing the red sub-pixel to emit light. By using the display substrate shown in FIG2 provided by the embodiment of the present disclosure, in the low grayscale driving state corresponding to the green sub-pixel, the spectral distribution trend generally shows a gradually decreasing trend, and the red spectral energy is significantly reduced. As a result, the risk of the green sub-pixel leaking electricity into the adjacent red sub-pixel and causing the adjacent red sub-pixel to emit light is effectively reduced, thereby improving the display effect of the display substrate when driven at low grayscale.

[0195] 23 to 40 are schematic flow charts of a method for manufacturing a display substrate according to at least one embodiment of the present disclosure.

[0196] As shown in Figure 23, the manufacturing method of the display substrate provided by at least one embodiment of the present disclosure includes: forming multiple sub-pixels on the base substrate 10, including forming the first electrode, the light-emitting functional layer and the second electrode of the light-emitting element in sequence in the first direction X, and forming a limiting portion.

[0197] As shown in FIG. 23 to FIG. 25 , a first conductive film 2011 is deposited on the base substrate 10 , and the first conductive film 2011 is patterned to form a first electrode 201 .

[0198] Then, a pixel defining pattern is formed, the pixel defining pattern including a plurality of openings and defining portions surrounding the plurality of openings, at least a portion of the light-emitting elements being located in the openings, the defining portions including a first defining portion located between adjacent light-emitting elements, wherein forming the first defining portion includes:

[0199] After forming the first electrode 201 and before forming the light-emitting functional layer, as shown in Figures 26 and 27, a defining portion is formed, including: forming a first defining layer 2013 on the first electrode 201, and patterning the first defining layer 2013 to form a first sub-defining portion 3021.

[0200] Then, as shown in Figures 28 and 29, a second defining layer 2014 is formed on the side of the first sub-defining portion 3021 away from the base substrate 10, and the second defining layer 2014 is patterned to form a second sub-defining portion 3022. The cross-sectional dimensions of the first defining portion 303, including the first and second sub-defining portions, taken by a plane in the second direction Y are defined as the cross-sectional dimensions. Along the first direction X, the cross-sectional dimensions first increase and then decrease, with the maximum cross-sectional dimension located at the partition 304 of the first defining portion 303. Both the plane and the second direction Y are perpendicular to the extension direction of the first defining portion 303, and the second direction Y is perpendicular to the first direction X.

[0201] As shown in Figures 28 and 29, the material of first defining layer 2013 is different from the material of second defining layer 2014. For example, the material of first defining layer 2013 has a first photosensitive property, so that first defining layer 2013 polymerizes when exposed to light, while the material of second defining layer 2014 has a second photosensitive property, so that second defining layer 2014 decomposes when exposed to light. Thus, the different photosensitive properties of first defining layer 2013 and second defining layer 2014 facilitate formation and reduce the risk of damage to first defining layer 2013 during, for example, an exposure process.

[0202] For example, as shown in Figures 28 to 29, the material of the first sub-defining portion 3021 may include phenolic resin and propylene glycol methyl ether acetate; for example, the material of the second sub-defining portion 3022 may include polyimide resin and propylene glycol methyl ether acetate, but is not limited thereto.

[0203] As shown in FIG30 , the method for manufacturing the display substrate further includes: forming a light-emitting functional layer 202 on a side of the first limiting portion 303 away from the base substrate 10 , and disconnecting at least one layer of the light-emitting functional layer 202 at an edge of the partition 304 facing the light-emitting element.

[0204] As shown in FIG31 , the method for manufacturing a display substrate further includes: disposing a second electrode 203 on a side of the light-emitting functional layer 202 that is away from the base substrate 10. For example, in the display substrate shown in FIG31 , the second electrode 203 is disposed continuously at the edge of the partition 304 facing the light-emitting element to ensure continuity between the second electrodes of adjacent sub-pixels.

[0205] For example, as shown in Figures 29 to 31, the cross section of the first defining portion 303 includes a side edge located between the maximum cross-sectional dimension and the base substrate 10, and the angle α between at least a portion of the side edge and the second direction Y is 95° to 105°. The maximum dimension of the first sub-defining portion 3021 in the first direction X is 0.7 μm to 1 μm. The cross section of the first defining portion 303 includes a side line located on the side of the maximum cross-sectional dimension away from the base substrate 10, and the angle between the tangent line connecting the side line and the maximum cross-sectional dimension and the second direction Y is 35° to 45°. The maximum dimension of the second sub-defining portion 3022 in the first direction X is 1.15 μm to 1.25 μm, but is not limited to this.

[0206] For example, in some embodiments of the present disclosure, as shown in Figures 26 and 27, patterning the first defining layer 2013 to form a first defining portion 303 may include: making the positive projection of the first defining portion 303 surrounding the opening on the base substrate 10 an open ring, and at least one first defining portion 303 is arranged between the light-emitting areas of two adjacent sub-pixels of different colors, so that the second electrodes 203 of adjacent light-emitting elements can be at least partially connected at the gap of the open ring.

[0207] For example, as shown in Figures 28 and 32, while patterning the second defining layer 2014 to form the second sub-defining portion 3022, the process may also include patterning the second defining layer 2014 to form the second defining portion 313, such that the edge of the light-emitting region of the sub-pixel 20, located at the non-closed annular gap, is immediately adjacent to the second defining portion 313. For example, as shown in Figure 33, the light-emitting functional layer 202 is formed on a side of the second sub-defining portion 3022 away from the base substrate 10, and at least one layer of the light-emitting functional layer 202 is disconnected at the edge of the partition 304 facing the light-emitting element. For example, at least one layer of the light-emitting functional layer 202 is disconnected between the first defining portion 303 and the immediately adjacent second defining portion 313.

[0208] For example, as shown in FIG34 , the second electrode 203 is formed on the side of the light-emitting functional layer 202 away from the base substrate 10 , and at least one layer of the second electrode 203 is disconnected between the first defining portion 303 and the adjacent second defining portion 313 .

[0209] For example, as shown in Figures 32 to 34 , the cross section of the first defining portion 303 cut by the plane includes a side edge located between the maximum cross-sectional dimension and the base substrate 10, and an angle β between at least a portion of the side edge and the second direction Y is 100° to 110°. The maximum dimension of the first sub-defining portion 3021 in the first direction X is 1 μm to 1.2 μm. For example, the cross section of the first defining portion 303 cut by the plane includes an edge line located on the side of the maximum cross-sectional dimension away from the base substrate 10, and an angle between the tangent line connecting the edge line and the maximum cross-sectional dimension and the second direction Y is 35° to 45°. The maximum dimension of the second sub-defining portion 3022 in the first direction X is 0.9 μm to 1.1 μm, but is not limited thereto. For example, as shown in Figures 33 and 34, when at least one film layer of the light-emitting functional layer 202 and the second electrode 203 are separated by the partition portion 304 of the first limiting portion 303, a portion of at least one film layer of the light-emitting functional layer 202 or a portion of the second electrode 203 may also be located between the first limiting portion 303 and the second limiting portion 313, for example, may fall to the side of the structural layer 40 away from the base substrate 10, but is not limited thereto.

[0210] For example, an embodiment of the present disclosure also provides another method for manufacturing a display substrate, including: forming a plurality of sub-pixels on a base substrate, wherein forming the sub-pixels includes sequentially forming a first electrode, a light-emitting functional layer, and a second electrode of a light-emitting element in a first direction X.

[0211] As shown in FIG. 23 to FIG. 25 , a first conductive film 2011 is deposited on the base substrate 10 , and the first conductive film 2011 is patterned to form a first electrode 201 .

[0212] After forming the first electrode 201 and before forming the light-emitting functional layer, as shown in Figures 35 and 36, the method for manufacturing the display substrate includes: forming a first material layer 2017 on the first electrode 201, and patterning the first material layer 2017 to form a partition structure 50.

[0213] Furthermore, the method for manufacturing the display substrate includes forming a pixel defining pattern, wherein the pixel defining pattern includes a plurality of openings and a defining portion surrounding the plurality of openings, at least a portion of the light-emitting element is located in the opening, wherein forming the defining portion includes:

[0214] As shown in Figures 37 and 38, a second material layer 2018 is formed on a side of the partition structure 50 away from the base substrate 10, and the second material layer 2018 is patterned to form a defining portion 302. The partition structure 50 is located between the defining portions 302 adjacent to each of the two adjacent openings, and the material of the partition structure 50 is different from that of the defining portions 302.

[0215] As shown in Figures 37 and 38, the dimension of the first side line 51 of the cross section of the partition structure 50 cut by a plane away from the base substrate 10 in the second direction Y is greater than the dimension of the second side line 52 of the cross section close to the base substrate 10 in the second direction Y. The plane and the second direction Y are both perpendicular to the extension direction of the first limiting portion 303, and the second direction Y is perpendicular to the first direction X.

[0216] For example, as shown in FIG39 , the light emitting functional layer 202 is formed on the side of the defining portion 302 away from the base substrate 10 , and at least one layer of the light emitting functional layer 202 is disconnected at the edge of the partition 304 facing the light emitting element.

[0217] For example, as shown in Figure 40, a second electrode 203 is formed on the side of the light-emitting functional layer 202 away from the base substrate 10, so that the second electrode 203 is disconnected at the edge of the partition structure 50 toward the light-emitting element, and a portion of the second electrode 203 of the adjacent light-emitting element is continuously arranged.

[0218] For example, as shown in Figures 38 to 40, a cross section of the partition structure 50 cut by the plane includes a side edge located between the maximum cross-sectional dimension and the base substrate 10, an angle μ between at least a portion of the side edge and the second direction Y is 95° to 105°, and a maximum dimension of the partition structure 50 in the first direction X is 0.7 μm to 1 μm. A cross section of the defining portion 302 cut by the plane includes a third side line 53 away from the base substrate 10, an angle between at least a portion of a tangent line to the third side line 53 and the second direction Y is 35° to 45°, and a maximum dimension of the defining portion 302 in the first direction X is 1.15 μm to 1.25 μm, but is not limited thereto.

[0219] For example, in some embodiments of the present disclosure, as shown in Figures 31, 34 and 40, the base substrate 10 may be a flexible base substrate. For example, forming the base substrate 10 may include sequentially forming a first flexible material layer, a first inorganic material layer, a semiconductor layer, a second flexible material layer and a second inorganic material layer on a glass carrier. The materials of the first flexible material layer and the second flexible material layer are polyimide (PI), polyethylene terephthalate (PET) or a surface-treated polymer soft film. For example, the materials of the first inorganic material layer and the second inorganic material layer are silicon nitride (SiNx) or silicon oxide (SiOx), etc., which are used to improve the water and oxygen resistance of the base substrate. The first inorganic material layer and the second inorganic material layer are also referred to as barrier layers. The material of the semiconductor layer is amorphous silicon (a-Si), but is not limited thereto.

[0220] For example, in some embodiments of the present disclosure, as shown in Figures 31, 34 and 40, before forming the first electrode 201, the method for manufacturing the display substrate may further include forming a structural layer 40 located on the base substrate 10. For example, forming the structural layer 40 may include forming a planarization layer, a layer where the active semiconductor pattern is located, a film layer where the gate line is located, a film layer where the data line is located, multiple insulating layers and other film layers, and the specific form and setting method of each film layer can be set according to design requirements, and the embodiments of the present disclosure are not limited to this.

[0221] For example, in some embodiments of the present disclosure, as shown in Figures 31, 34 and 40, the method for manufacturing the display substrate also includes forming an encapsulation layer, for example, it may include forming a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer in sequence on the side of the second electrode 203 away from the base substrate 10, so that the display substrate has a good encapsulation effect and prevents the intrusion of water vapor or impurities.

[0222] There are a few points to note:

[0223] (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.

[0224] (2) In the absence of conflict, features in the same embodiment and different embodiments of the present disclosure may be combined with each other.

[0225] 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, each of at least some of the sub-pixels comprises a light-emitting element, the light-emitting element comprises a light-emitting functional layer having a plurality of film layers, and the plurality of film layers are stacked in a first direction; a pixel defining pattern, comprising a plurality of openings and a defining portion surrounding the plurality of openings, wherein at least a portion of the light emitting element is located in the openings, The defining portion includes a first defining portion located between adjacent light-emitting elements, a cross section of the first defining portion cut by a plane has a size in the second direction as a cross section size, along the first direction, the cross section size increases first and then decreases, and the maximum position of the cross section size is located at a partition of the first defining portion, the plane and the second direction are both perpendicular to an extension direction of the first defining portion, and the first direction is perpendicular to the base substrate, and the second direction is perpendicular to the first direction; At least a portion of the pattern of at least one layer of the light-emitting functional layer is located on a side of the first defining portion away from the base substrate, and the orthographic projection of the edge of the at least portion of the pattern on the base substrate falls into the orthographic projection of the first defining portion on the base substrate.

2. The display substrate according to claim 1, wherein: The light emitting element further comprises a first electrode and a second electrode located on both sides of the light emitting functional layer along the first direction, wherein the first electrode is located between the light emitting functional layer and the base substrate. The first defining portion includes a first sub-defining portion and a second sub-defining portion which are stacked, the first sub-defining portion is located between the second sub-defining portion and the base substrate, the material of the first sub-defining portion is different from the material of the second sub-defining portion, and the separating portion includes a boundary where the first sub-defining portion and the second sub-defining portion are connected to each other.

3. The display substrate according to claim 2, wherein: The interface where the first sub-defining portion and the second sub-defining portion contact each other is the position where the cross-sectional dimension is the largest.

4. The display substrate according to any one of claims 2 or 3, wherein: The contact surface between the first sub-defining portion and the second sub-defining portion is a first surface, the contact surface between the second sub-defining portion and the first sub-defining portion is a second surface, and the orthographic projection of the second surface on the base substrate is completely within the orthographic projection of the first surface on the base substrate.

5. The display substrate according to any one of claims 2 to 4, wherein: The surface of the second sub-defining portion on a side away from the base substrate includes a curved surface that is curved toward a side away from the base substrate or a flat surface that is parallel to the base substrate.

6. The display substrate according to any one of claims 2 to 4, wherein: The second electrode of at least part of the light emitting element includes a portion extending along the second direction and another portion having a component extending in the first direction.

7. The display substrate according to any one of claims 2 to 4, wherein: At least a partial pattern of at least one layer of the light-emitting functional layer includes a first part and a second part, wherein the orthographic projection of an edge of the first part on the base substrate falls within the orthographic projection of the first limiting portion on the base substrate, and the edge of the first part is located on a side of the partition portion away from the base substrate, and the edge of the second part is located on a side of the partition portion close to the base substrate.

8. The display substrate according to any one of claims 1 to 6, wherein: In the first direction, a distance between an edge of the first portion and an edge of the second portion is 0.2 μm to 0.5 μm.

9. The display substrate according to any one of claims 2 to 5, wherein: The second electrodes of at least some of the adjacent sub-pixels are continuously arranged at the edge of the partition.

10. The display substrate according to claim 9, wherein: The cross section includes a side edge between a position where the cross section has a maximum dimension and the substrate, an angle between at least a portion of the side edge and the second direction is 95° to 105°, and a maximum dimension of the first sub-defining portion in the first direction is 0.7 μm to 1 μm; The cross section includes a side line located at a side away from the substrate at a maximum position of the cross section dimension, an angle between a tangent line at a connection point between the side line and the maximum position of the cross section dimension and the second direction is 35° to 45°, and a maximum dimension of the second sub-limiting portion in the first direction is 1.15 μm to 1.25 μm.

11. The display substrate according to claim 9, wherein: A maximum dimension of the first limiting portion in the second direction is 13 μm to 19 μm.

12. The display substrate according to any one of claims 9 or 10, wherein: Two adjacent sub-pixels arranged along the second direction are configured to emit light of different colors, and a first limiting portion is disposed between the two adjacent sub-pixels.

13. The display substrate according to any one of claims 2 to 5, wherein: The second electrodes of adjacent sub-pixels are disconnected at the edge of the partition.

14. The display substrate according to claim 13, wherein: The cross section includes a side edge between a position where the cross section has a maximum dimension and the substrate, an angle between at least a portion of the side edge and the second direction is 100° to 110°, and a maximum dimension of the first sub-defining portion in the first direction is 1 μm to 1.2 μm; The cross section includes a side line located at a side away from the substrate at a maximum position of the cross section dimension, an angle between a tangent line at a connection point between the side line and the maximum position of the cross section dimension and the second direction is 35° to 45°, and a maximum dimension of the second sub-limiting portion in the first direction is 0.9 μm to 1.1 μm.

15. The display substrate according to claim 13, wherein: A maximum dimension of the first limiting portion in the second direction is 5 μm to 9 μm.

16. The display substrate according to claim 13 or 15, wherein the defining portion further comprises a second defining portion, the second defining portion is adjacent to an edge of a light emitting area of ​​the light emitting element, and an extending direction of the second defining portion is the same as an extending direction of the first defining portion. in, In the first direction, a size of the second defining portion is smaller than a size of the first defining portion, and the second defining portion and the second sub-defining portion are made of the same material.

17. The display substrate according to claim 16, wherein: In the first direction, a size of the second defining portion is larger than a size of the second sub-defining portion.

18. The display substrate according to any one of claims 16 or 17, wherein: Two adjacent sub-pixels arranged along the second direction are configured to emit light of different colors, and two first defining portions are arranged between the two adjacent sub-pixels or one first defining portion and one second defining portion are arranged between the two adjacent sub-pixels.

19. The display substrate according to any one of claims 1 to 18, wherein: The position with the largest cross-sectional dimension is further away from the base substrate than the surface of the light-emitting functional layer on the side away from the base substrate.

20. The display substrate according to any one of claims 2 to 14, wherein: The material of the first sub-defining portion has a first photosensitive property, so that the first sub-defining portion is polymerized when illuminated; The material of the second sub-defining portion has a second photosensitivity property, so that the second sub-defining portion is decomposed when exposed to light.

21. The display substrate according to any one of claims 2 to 18, wherein: The material of the first sub-defining portion includes phenolic resin and propylene glycol methyl ether acetate, and / or the material of the second sub-defining portion includes polyimide resin and propylene glycol methyl ether acetate.

22. The display substrate according to any one of claims 9 to 12, wherein: The first defining portion is located between light emitting areas of light emitting elements of two adjacent sub-pixels, and the orthographic projection of the first defining portion on the base substrate overlaps with the orthographic projections of the first electrodes of the light emitting elements of the two adjacent sub-pixels on the base substrate.

23. The display substrate according to any one of claims 9 to 12, wherein: The orthographic projection of the first defining portion surrounding the opening on the base substrate is in the shape of a closed ring.

24. The display substrate according to any one of claims 13 to 18, wherein: The orthographic projection of the first limiting portion surrounding the opening on the base substrate is an open ring shape, and the second electrodes of adjacent light-emitting elements are at least partially connected at the notch of the open ring shape.

25. The display substrate according to claim 16, wherein: At least part of the edges of the light emitting area of ​​the sub-pixel include a first edge adjacent to the first defining portion and a second edge adjacent to the second defining portion, At least parts of the first edges of the light-emitting areas of two adjacent sub-pixels are arranged opposite to each other, and a first interval exists between the orthographic projections of the first limiting portions respectively adjacent to the first edges of the light-emitting areas of the two adjacent sub-pixels on the base substrate; The second edge of the light-emitting area of ​​the sub-pixel is at least partially arranged opposite to the first edge of the light-emitting area of ​​the adjacent sub-pixel, and there is a second interval between the orthographic projections of the limiting portions adjacent to the second edge and the first edge respectively arranged opposite to each other on the substrate.

26. The display substrate according to claim 25, wherein: In the arrangement direction of the sub-pixels, a size of the first interval is larger than a size of the second interval.

27. The display substrate according to claim 25, wherein: The plurality of sub-pixels include a plurality of first color sub-pixels, 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 first arrangement direction, the first sub-pixel groups include the first color sub-pixels and the second color sub-pixels alternately arranged along a second arrangement direction, the second sub-pixel groups include the third color sub-pixels arranged along the second arrangement direction, and the first arrangement direction intersects with the second arrangement direction; The first subpixel group and the second subpixel group are staggered in the second arrangement direction, and each first color subpixel in at least part of the first color subpixels is surrounded by eight subpixels, and the eight subpixels include the third color subpixels and the second color subpixels that are alternately arranged.

28. The display substrate according to claim 25, wherein: The plurality of sub-pixels include a plurality of first color sub-pixels, a plurality of second color sub-pixels, and a plurality of third color sub-pixels. The plurality of sub-pixels include a plurality of pixel units arranged in an array along a first arrangement direction and a second arrangement direction, each pixel unit including a first color sub-pixel, a second color sub-pixel and a third color sub-pixel; In each pixel unit, the second color sub-pixels and the third color sub-pixels are alternately arranged along the first arrangement direction, the first color sub-pixels and the third color sub-pixels are alternately arranged along the second arrangement direction, and the first arrangement direction intersects with the second arrangement direction.

29. The display substrate according to any one of claims 27 or 28, wherein: A first limiting portion is arranged between adjacent sub-pixels.

30. The display substrate according to any one of claims 2 to 18, wherein: An orthographic projection of a portion of the light-emitting functional layer of the light-emitting element located in the opening on the base substrate at least partially overlaps with an orthographic projection of the first sub-defining portion surrounding the opening on the base substrate.

31. A display substrate, comprising: substrate substrate; A plurality of sub-pixels are located on the base substrate, each of at least some of the sub-pixels includes a light-emitting element, the light-emitting element includes a light-emitting functional layer and a first electrode and a second electrode located on both sides of the light-emitting functional layer along a first direction, the first electrode is located between the light-emitting functional layer and the base substrate, and the first direction is perpendicular to the base substrate; a pixel defining pattern, comprising a plurality of openings and a defining portion surrounding the plurality of openings, wherein at least a portion of the light emitting element is located in the openings, A partition structure is located between the defining portions adjacent to two adjacent openings, and the material of the partition structure is different from that of the defining portions. The maximum dimension of a cross section of the partition structure cut by a plane away from a first side line of the substrate in the second direction is greater than the maximum dimension of a second side line of the cross section close to the substrate in the second direction, the plane and the second direction are both perpendicular to the extension direction of the limiting portion, and the second direction is perpendicular to the first direction, Between at least two adjacent light-emitting elements, at least one of the light-emitting functional layers is disconnected at the edge of the partition structure, and at least a portion of the second electrode corresponding to at least one light-emitting element extends from the light-emitting region of the light-emitting element to the light-emitting region of at least one adjacent light-emitting element.

32. The display substrate according to claim 31, wherein: The material of the partition structure includes phenolic resin and propylene glycol methyl ether acetate, and / or the material of the limiting part includes polyimide resin and propylene glycol methyl ether acetate.

33. The display substrate according to any one of claims 30 to 32, wherein: The cross section includes a side edge between the maximum cross section position and the substrate, the angle between at least a portion of the side edge and the second direction is 95° to 105°, and the maximum dimension of the partition structure in the first direction is 0.7 μm to 1 μm; The cross section of the defining portion cut by the plane includes a third sideline away from the base substrate, the angle between at least part of the tangent of the third sideline and the second direction is 35° to 45°, and the maximum size of the defining portion in the first direction is 1.15μm to 1.25μm.

34. The display substrate according to any one of claims 30 to 32, wherein: The maximum dimension of the partition structure in the second direction is 3 μm to 6 μm.

35. The display substrate according to any one of claims 30 to 32, wherein: In the second direction, the distance between the partition structure and the adjacent light-emitting area is 4 μm to 7 μm.

36. A display device comprising the display substrate according to any one of claims 1 to 35.

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