Display substrate, display panel, and display apparatus

Abstract

A display substrate, a display panel, and a display apparatus. The display substrate comprises a base substrate, a plurality of sub-pixels, and a pixel defining layer. The plurality of sub-pixels are located on the base substrate, and each sub-pixel comprises a light-emitting functional layer as well as a first electrode and a second electrode located on two sides of the light-emitting functional layer in a direction perpendicular to the base substrate. The first electrode is located between at least part of the light-emitting functional layer and the base substrate. The pixel defining layer is located between the light-emitting functional layers and the base substrate. The pixel defining layer comprises a plurality of pixel openings and a pixel defining portion located between adjacent pixel openings. Each pixel opening exposes at least part of a first electrode. The light-emitting functional layer is in contact with the first electrode through the pixel opening. A slope angle is formed between at least part of the surface of the pixel defining portion that is located on the first electrode and is away from the base substrate and the first electrode, and the slope angle is 25-35 degrees, so that scratches from a mask on light-emitting material in the pixel openings can be reduced, and the product defect rate caused by the scratching problem can be reduced.

Description

Display substrate, display panel, and display device

[0001] This application claims priority to Chinese Patent Application No. 202411365734.X, filed September 27, 2024, the disclosure of which is incorporated herein in its entirety as part of the present application. TECHNICAL FIELD

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

[0003] Organic Light-Emitting Diode (OLED) display devices are favored by users due to their rich colors, fast response time, foldability, and other advantages. An organic light-emitting display device with a tandem structure improves the service life and brightness of the light-emitting device and reduces power consumption by adding at least one light-emitting layer and a charge generation layer in the organic light-emitting device, thereby meeting the needs of users for display device power consumption and service life, and is expected to lead the trend of next-generation OLED technology and product development. SUMMARY

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

[0005] At least one embodiment of the present disclosure provides a display substrate, comprising a substrate substrate, a plurality of sub-pixels, and a pixel defining layer, the plurality of sub-pixels are located on the substrate substrate, the sub-pixel comprises a light-emitting functional layer, and a first electrode and a second electrode located on both sides of the light-emitting functional layer in a direction perpendicular to the substrate substrate, the first electrode is located between at least part of the light-emitting functional layer and the substrate substrate, the pixel defining layer is located between the light-emitting functional layer and the substrate substrate, the pixel defining layer comprises a plurality of pixel openings and a pixel defining portion located between adjacent pixel openings, the pixel opening exposes at least part of the first electrode, the light-emitting functional layer is in contact with the first electrode through the pixel opening, and at least part of a surface of the pixel defining portion located on a side of the first electrode away from the substrate substrate has a slope angle with the first electrode, the slope angle is 25-35 degrees.

[0006] For example, according to at least one embodiment of the present disclosure, the display substrate, in a direction perpendicular to the substrate substrate, the maximum distance between the surface of the pixel defining portion away from the substrate substrate and the substrate substrate is greater than the maximum distance between the surface of the light-emitting functional layer in the pixel opening away from the substrate substrate and the substrate substrate.

[0007] For example, the display substrate provided by at least one embodiment of the present disclosure, the sub-pixel includes a pixel driving circuit, the pixel driving circuit is located between the first electrode and the substrate, the pixel driving circuit is electrically connected with the first electrode to drive the light-emitting functional layer to emit light, and the display substrate further includes at least one metal pattern, the at least one metal pattern is located between the first electrode and at least part of the pixel driving circuit, each metal pattern includes a plurality of metal structures, and the first electrode of the sub-pixel and the pixel driving circuit of the sub-pixel are both overlapped with the metal structures in a direction perpendicular to the substrate.

[0008] For example, the display substrate provided by at least one embodiment of the present disclosure, the plurality of sub-pixels include at least two different color sub-pixels, and the metal structures overlapped with the first electrode of the sub-pixels of each color fall completely into the orthographic projection of the pixel opening corresponding to the sub-pixel on the substrate.

[0009] For example, the display substrate provided by at least one embodiment of the present disclosure, the metal structures overlapped with the first electrode of the sub-pixels of at least one color have a first distance between the orthographic projection on the substrate and the pixel defining part of the pixel opening corresponding to the sub-pixel on the substrate, and the first distance is not less than 4 microns.

[0010] For example, the display substrate provided by at least one embodiment of the present disclosure, the plurality of sub-pixels include at least two different color sub-pixels, and the metal structures overlapped with the first electrode of the sub-pixels of at least one color include a part located outside the pixel opening corresponding to the sub-pixel.

[0011] For example, the display substrate provided by at least one embodiment of the present disclosure, the at least one color sub-pixel is a color sub-pixel, and the color is green.

[0012] For example, the display substrate provided by at least one embodiment of the present disclosure, the at least one metal pattern includes a first metal pattern and a second metal pattern, the second metal pattern is located between the first metal pattern and at least part of the pixel driving circuit of the sub-pixel, and the metal structures of the first metal pattern and the metal structures of the second metal pattern at least partially overlap in a direction perpendicular to the substrate.

[0013] For example, a display substrate provided according to at least one embodiment of the present disclosure, the pixel opening corresponding to the sub-pixel has a first orthogonal projection on the substrate, each of at least part of the metal structures of at least one of the first metal pattern and the second metal pattern has a second orthogonal projection on the substrate, the second orthogonal projection falls into the first orthogonal projection, and an area of the second orthogonal projection is less than an area of the first orthogonal projection.

[0014] For example, a display substrate provided according to at least one embodiment of the present disclosure, the pixel opening corresponding to the sub-pixel has a first orthogonal projection on the substrate, an orthogonal projection of the metal structure in the first metal pattern on the substrate falls into the first orthogonal projection, and an orthogonal projection of the metal structure in the second metal pattern on the substrate includes a part outside the first orthogonal projection.

[0015] For example, a display substrate provided according to at least one embodiment of the present disclosure, the sub-pixel includes a pixel driving circuit, the pixel driving circuit is located between the first electrode and the substrate, the pixel driving circuit is electrically connected with the first electrode to drive the light-emitting functional layer to emit light, the display substrate further includes a metal pattern, the metal pattern is located between at least part of the first electrode and the pixel driving circuit, at least one layer of the metal pattern includes a first metal part and a second metal part corresponding to each of the sub-pixels, in a direction perpendicular to the substrate, the first metal part corresponding to the sub-pixel overlaps with the first electrode of the sub-pixel, the second metal part corresponding to the sub-pixel overlaps with the pixel defining part surrounding the pixel opening corresponding to the sub-pixel, the first metal part corresponding to the sub-pixel and the second metal part corresponding to the sub-pixel have a spacing, and in the direction perpendicular to the substrate, an edge of the pixel defining part surrounding the pixel opening of the sub-pixel close to the first metal part does not overlap with the metal pattern.

[0016] For example, the display substrate provided by at least one embodiment of the present disclosure further comprises an inorganic layer and an organic layer, the inorganic layer is located between the first electrode of the sub-pixel and the substrate substrate, the inorganic layer comprises a plurality of inorganic structures, at least part of the inorganic structures is located in the pixel opening corresponding to the sub-pixel; the organic layer is located on the side of the inorganic layer close to the substrate substrate and in contact with the inorganic layer, the organic layer comprises a plurality of organic structures, the inorganic structure comprises a protruding part protruding relative to the edge of the organic structure, wherein the light-emitting functional layer comprises a plurality of film layers, at least part of the sub-pixels has a defined opening between adjacent sub-pixels, the part of the protruding part of the inorganic structure exposed by the defined opening serves as a partition part, and the partition part is configured to partition at least one layer in the light-emitting functional layer.

[0017] For example, the display substrate provided by at least one embodiment of the present disclosure comprises a plurality of sub-pixels, the plurality of sub-pixels comprises at least two different colors of sub-pixels, and the protruding part of the inorganic structure corresponding to each of the sub-pixels of at least one color is covered by the pixel limiting part.

[0018] For example, the display substrate provided by at least one embodiment of the present disclosure, the edge of the protruding part covered by the pixel limiting part and the pixel opening corresponding to the corresponding sub-pixel have a second distance, and the second distance is not less than 1 / 2 of the size of the pixel limiting part in the direction of the second distance.

[0019] For example, the display substrate provided by at least one embodiment of the present disclosure, the second distance is 1-3 microns.

[0020] For example, the display substrate provided by at least one embodiment of the present disclosure, the plurality of sub-pixels comprises a first sub-pixel and a second sub-pixel, the area of the light-emitting area of the first sub-pixel is smaller than the area of the light-emitting area of the second sub-pixel, and the protruding part of the inorganic structure corresponding to the first sub-pixel is covered by the pixel limiting part.

[0021] For example, the display substrate provided by at least one embodiment of the present disclosure, each of the sub-pixels includes a pixel driving circuit, the pixel driving circuit is located between the first electrode and the substrate, the pixel driving circuit is electrically connected with the first electrode to drive the light-emitting functional layer to emit light, the display substrate further includes at least one layer of metal pattern, the at least one layer of metal pattern is located between the first electrode and at least part of the pixel driving circuit, each layer of the metal pattern includes a plurality of metal structures, in the direction perpendicular to the substrate, the first electrode of the sub-pixel and the pixel driving circuit of the sub-pixel overlap with the metal structure, wherein the protruding part of the inorganic structure overlapping with the first electrode of each of the sub-pixels of a color of sub-pixel is covered by the pixel defining part, and the metal structure overlapping with the first electrode of the sub-pixel of the color of sub-pixel includes a part located outside the pixel opening corresponding to the corresponding sub-pixel.

[0022] For example, the display substrate provided by at least one embodiment of the present disclosure further includes an inorganic layer and an organic layer, the inorganic layer is located on the substrate, the inorganic layer includes a plurality of first partition structures; the organic layer is located on the side of the inorganic layer close to the substrate and in contact with the inorganic layer, the organic layer includes a plurality of second partition structures, wherein the first partition structure and the second partition structure are both located between adjacent sub-pixels, the first partition structure includes a protruding part protruding relative to the edge of the second partition structure, the first partition structure and the second partition structure are both spaced apart from the pixel defining part, the light-emitting functional layer includes a plurality of film layers, the pixel defining layer includes a plurality of defining openings, each of the defining openings is located between adjacent sub-pixels, the protruding part of the first partition structure is exposed by the defining opening to partition at least one layer in the light-emitting functional layer.

[0023] For example, the display substrate provided by at least one embodiment of the present disclosure, the pixel defining material is formed into the pixel defining layer after exposure treatment by a mask, the mask includes a plurality of mask openings, after the exposure treatment of the pixel defining material, the orthographic projection of the mask opening on the substrate has a third distance with the orthographic projection of the pixel opening in the pixel defining layer on the substrate, the third distance is not greater than 2 microns.

[0024] For example, the display substrate provided by at least one embodiment of the present disclosure, the third distance is 1 micron to 1.5 microns.

[0025] For example, the display substrate provided according to at least one embodiment of the present disclosure further comprises a plurality of support structures located on the substrate and located on one side of the pixel opening corresponding to the sub-pixel, wherein at least part of the surface of the support structure away from the substrate is farther away from the substrate than the pixel defining part, and the difference between the maximum size of the support structure and the maximum size of the pixel defining part in the direction perpendicular to the substrate is at least 0.5 microns.

[0026] Another embodiment of the present disclosure provides a display panel comprising any of the display substrates described above.

[0027] Yet another embodiment of the present disclosure provides a display device comprising any of the display substrates described above. BRIEF DESCRIPTION OF DRAWINGS

[0028] 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 described below only relate to some of the embodiments of the present disclosure, but not limit the present disclosure.

[0029] FIG. 1 is a partial cross-sectional schematic view of a display substrate.

[0030] FIG. 2 is a partial planar structure schematic view of a display substrate provided according to at least one embodiment of the present disclosure.

[0031] FIG. 3 is a partial cross-sectional structure schematic view along the A-A' line shown in FIG. 2.

[0032] FIG. 4 is a partial cross-sectional schematic view of another display substrate provided according to at least one embodiment of the present disclosure.

[0033] FIGS. 5-8 are partial cross-sectional schematic views of different display substrates provided according to at least one embodiment of the present disclosure.

[0034] FIG. 9 is a partial planar structure schematic view of another display substrate provided according to at least one embodiment of the present disclosure.

[0035] FIG. 10 is a partial cross-sectional structure schematic view along the B-B' line shown in FIG. 9.

[0036] FIG. 11 is a partial planar structure schematic view of yet another display substrate provided according to at least one embodiment of the present disclosure.

[0037] FIG. 12 is a schematic view of the display substrate shown in FIG. 11 when a mask is set during the manufacturing process.

[0038] FIG. 13 is a manufacturing process schematic view of a pixel defining layer in a display substrate.

[0039] FIG. 14 is a light path diagram when the pixel definition material is exposed through a mask.

[0040] FIG. 15 is a plan view of a pixel definition layer after the pixel definition material is exposed.

[0041] FIG. 16 is a process diagram of manufacturing a pixel definition layer in a display substrate according to at least one embodiment of the present disclosure.

[0042] FIG. 17 is a light path diagram when the pixel definition material is exposed through a mask according to at least one embodiment of the present disclosure.

[0043] FIG. 18 is a schematic block diagram of a display device according to at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and superiorities of the embodiments of the present disclosure clearer, the technical solutions will be described below in connection with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of the present disclosure.

[0045] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure pertains. The terms “first”, “second”, and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. The terms “include”, “contain”, and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The features “parallel”, “vertical”, and “same” used in the embodiments of the present disclosure include the strict “parallel”, “vertical”, “same” and the “approximately parallel”, “approximately vertical”, “approximately same” with a certain error, which, considering the measurement and the error related to the measurement of a specific value (for example, the limitation of a measurement system), means within an acceptable deviation range for a specific value determined by those 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 quantity of a component is not specifically indicated in the following description of the embodiments of the present disclosure, it means that the component can be one or more, or can be understood as at least one. “At least one” means one or more, and “a plurality of” means at least two.

[0046] Currently, the Tandem technology mainly stacks and connects two sub-pixel light-emitting layers, and sets a full-layer charge generation layer, such as a P-type doped charge generation layer P-CGL and an N-type doped charge generation layer N-CGL, between the stacked light-emitting layers. For example, the Tandem device can replace one light-emitting layer in the light-emitting element in the OLED display panel with two light-emitting layers. Compared with a display substrate without a Tandem device, the two light-emitting layers in the Tandem device are connected in series, so that a double light-emitting device is connected in series, which can reduce the light-emitting current of the light-emitting device under the same light-emitting intensity, improve the service life of the organic light-emitting element, and reduce power consumption.

[0047] FIG. 1 is a partial cross-sectional view of a display substrate.

[0048] In research, the inventors of the present application found that the conductivity of the charge generation layer in the Tandem device is relatively large, the charge generation layers of the two adjacent sub-pixels are continuous film layers, and there is a phenomenon of lateral migration of charges, which is easy to cause crosstalk between adjacent sub-pixels, resulting in color deviation of the display substrate. In view of this, some products set a separation column between adjacent sub-pixels to separate the light-emitting functional layer, thereby reducing the risk of crosstalk. For example, referring to FIG. 1, the manufacturing mask 11 of the light-emitting functional layer 130 (such as including a first light-emitting layer 131, a charge generation layer 133, and a second light-emitting layer 132) of the Tandem device can scratch the light-emitting material of the light-emitting functional layer 130 in the light-emitting area of the sub-pixel (see scratch area A1), which may cause the double-layer OLED device to be scratched into a single-layer OLED device. In the low gray scale and low brightness display mode, a scratch bright spot is generated, and in the high gray scale and high brightness display mode, a scratch dark spot is generated, thereby reducing the yield of the product and significantly increasing the production cost of the Tandem device.

[0049] In view of this, through verification analysis of the scratch-type bright spot (for example, a bright spot caused by the above-mentioned scratching phenomenon), it is found that the main reason for the light-emitting functional layer manufacturing mask scratching the light-emitting material in the light-emitting area of the sub-pixel is that the slope angle of the sidewall of the pixel defining portion around the light-emitting area of the sub-pixel is insufficient (for example, less than 25 degrees), so that the support ability of the above-mentioned manufacturing mask is insufficient. In addition, when a support structure for supporting the mask is provided in the display substrate, the density and height of the support structure are also insufficient, which can exacerbate the above-mentioned scratching problem.

[0050] At least one embodiment of the present disclosure provides a display substrate, comprising a substrate substrate, a plurality of sub-pixels and a pixel defining layer, the plurality of sub-pixels are located on the substrate substrate, the sub-pixel comprises a light-emitting functional layer, and a first electrode and a second electrode located on both sides of the light-emitting functional layer in a direction perpendicular to the substrate substrate, the first electrode is located between at least part of the light-emitting functional layer and the substrate substrate, the pixel defining layer is located between the light-emitting functional layer and the substrate substrate, the pixel defining layer comprises a plurality of pixel openings and a pixel defining portion located between adjacent pixel openings, the pixel opening exposes at least part of the first electrode, the light-emitting functional layer is in contact with the first electrode through the pixel opening, and at least part of the surface of the pixel defining portion located on the side of the first electrode away from the substrate substrate has a slope angle with the first electrode, and the slope angle is 25-35 degrees.

[0051] At least one embodiment of the present disclosure provides a display substrate, wherein the slope angle between at least part of the surface of the pixel defining portion located on the side of the first electrode away from the substrate substrate and the first electrode is not less than 25 degrees and is 25-35 degrees, so that the pixel defining portion can effectively support the manufacturing mask of the light-emitting functional layer, thereby reducing the risk of contact and scratching of the light-emitting material in the pixel opening by the manufacturing mask, and significantly reducing the product failure rate caused by the scratching problem.

[0052] At least one embodiment of the present disclosure provides a display panel comprising the display substrate provided by any one of the embodiments of the present disclosure.

[0053] Another embodiment of the present disclosure also provides a display device comprising the display substrate provided by any one of the embodiments of the present disclosure.

[0054] The display substrate, display panel and display device provided by the embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0055] FIG. 2 is a partial planar structure schematic diagram of the display substrate provided by at least one embodiment of the present disclosure; and FIG. 3 is a partial cross-sectional structure schematic diagram along the line A-A' shown in FIG. 2.

[0056] As shown in FIGS. 2 and 3, the display substrate comprises a substrate substrate BS, a plurality of sub-pixels 10 and a pixel defining layer 200. The plurality of sub-pixels 10 are located on the substrate substrate BS, the sub-pixel 10 comprises a light-emitting functional layer 130, and a first electrode 110 and a second electrode 120 located on both sides of the light-emitting functional layer 130 in a direction perpendicular to the substrate substrate BS (i.e., the Z direction as shown in FIG. 3), the first electrode 110 is located between at least part of the light-emitting functional layer 130 and the substrate substrate BS.

[0057] For example, as shown in FIG. 3, the light-emitting functional layer 130 includes a plurality of film layers. For example, the light-emitting functional layer 130 can include a light-emitting layer for emitting light and a charge generation layer 133 having strong conductivity, which can enable the light-emitting functional layer 130 to have advantages of long service life, low power consumption, and high brightness. For example, the light-emitting functional layer 130 can be a film layer in an organic light-emitting element. For example, the light-emitting functional layer 130 can include a first light-emitting layer (EML) 131, a charge generation layer (CGL) 133, and a second light-emitting layer (EML) 132 stacked, and the charge generation layer 133 is located between the first light-emitting layer 131 and the second light-emitting layer 132. It should be noted that the light-emitting functional layer 130 shown in FIG. 3 can also include other film layers, such as a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL), etc., which are not limited by embodiments of the present disclosure. For example, the hole injection layer, the hole transport layer, the electron transport layer, the electron injection layer, the charge generation layer 133, and the second electrode 120 are common film layers of the plurality of sub-pixels 10, which can be referred to as common layers. In addition, the thickness of each film layer shown in FIG. 3 is only for clearly showing each film layer, and does not represent the actual size.

[0058] For example, as shown in FIG. 3, the sub-pixel 10 can include a tandem light-emitting element, such as a Tandem OLED, but embodiments of the present disclosure are not limited thereto.

[0059] For example, as shown in FIG. 3, the side of the first electrode 110 facing the substrate BS is also provided with other structures 01, such as a pixel driving circuit 240, a signal line, and various insulating layers electrically connected to the first electrode 110 of the sub-pixel 10, for example, which can include a passivation layer, a buffer layer, a gate insulating layer, an interlayer insulating layer, etc., which are not limited by embodiments of the present disclosure.

[0060] As shown in FIGS. 2 and 3, at least part of the pixel defining layer 200 is located between the light-emitting functional layer 130 and the substrate BS, and the pixel defining layer 200 includes a plurality of pixel openings 210 and a pixel defining portion 230 located between adjacent pixel openings 210. The pixel opening 210 exposes at least part of the first electrode 110 to define a light-emitting area of the sub-pixel 10, and the light-emitting functional layer 130 is arranged in contact with the first electrode 110 through the pixel opening 210. For example, the first electrode 110 and the second electrode 120 located on both sides of the light-emitting functional layer 130 can drive the light-emitting functional layer 130 located therebetween to emit light. For example, the light-emitting area of the sub-pixel 10 refers to the area of the effective light emission of the sub-pixel 10, and the shape of the light-emitting area refers to a two-dimensional shape, for example, the shape of the light-emitting area can be the same as the shape of the orthographic projection of the part of the first electrode 110 exposed by the pixel opening 210 on the substrate BS.

[0061] As shown in FIG. 3, the slope angle μ between the at least partial surface of the pixel defining portion 230 on the side away from the substrate base plate BS of the first electrode 110 and the first electrode 110 is 25-35 degrees. For example, the above-mentioned slope angle μ can be the included angle between the side of the portion of the pixel defining portion 230 close to the pixel opening 210 corresponding to the sub-pixel 10 and the surface of the first electrode 110 away from the substrate base plate BS. For example, the above-mentioned slope angle μ can be the included angle between the tangent plane of the portion of the side surface of the pixel defining portion 230 close to the pixel opening 210 of the sub-pixel 10 and the plane parallel to the substrate base plate BS, thereby facilitating the pixel defining portion effectively supporting the manufacturing mask of the light emitting element. For example, the above-mentioned slope angle μ can be 25-35 degrees, such as at least one of 26-30 degrees, 28-32 degrees and 30-35 degrees, or other angles within the range of 25-35 degrees, which are not limited by the embodiments of the present disclosure.

[0062] At least one embodiment of the present disclosure provides a display substrate, wherein the slope angle between the at least partial surface of the pixel defining portion on the side away from the substrate base plate of the first electrode and the first electrode is not less than 25 degrees and is 25-35 degrees, thereby enabling the pixel defining portion to effectively support the manufacturing mask of the light emitting functional layer, so as to reduce the risk of the manufacturing mask contacting and scratching the light emitting material in the light emitting area of the sub-pixel, and significantly reduce the product failure rate due to the scratching problem (for example, the product failure rate can be reduced from 80% to less than 5%).

[0063] For example, as shown in FIG. 3, in the Z direction, the maximum distance between the surface of the pixel defining portion 230 away from the substrate base plate BS and the substrate base plate BS is greater than the maximum distance between the surface of the light emitting functional layer 130 in the pixel opening 210 away from the substrate base plate BS and the substrate base plate BS. For example, the at least partial surface of the pixel defining portion 230 away from the substrate base plate BS is farther away from the substrate base plate BS than the light emitting functional layer 130. For example, the surface of the pixel defining portion 230 away from the substrate base plate BS includes a portion on the side away from the substrate base plate BS of the light emitting functional layer 130 (i.e., a portion beyond the light emitting functional layer), and in the Z direction, the maximum distance between the portion and the light emitting functional layer 130 can be 1 / 3-2 / 3, such as 1 / 2, of the maximum size of the pixel defining portion 230, which is not limited by the embodiments of the present disclosure.

[0064] Thus, the at least partial surface of the pixel defining portion is protruded relative to the light emitting functional layer, thereby enabling the sub-pixel to have a good light emitting angle and enabling the pixel defining portion to have a good supporting ability for the manufacturing mask of the light emitting functional layer.

[0065] For example, as shown in FIG. 3, the display substrate includes an inorganic layer 410. The inorganic layer 410 is located between the first electrode 110 of the sub-pixel 10 and the substrate substrate BS, the inorganic layer 410 includes a plurality of inorganic structures 405, and at least part of the inorganic structures 405 is located in the pixel opening 210 corresponding to the sub-pixel 10. For example, the orthographic projection of the pixel opening 210 on the substrate substrate BS falls in the orthographic projection of the inorganic structure 405 on the substrate substrate BS. For example, the first electrode 110 of the sub-pixel 110 is located on the inorganic structure 405, and the inorganic structure 405 can make the first electrode 110 have good flatness. For example, the inorganic layer 410 can be a one-piece structure or a split structure, and the embodiments of the present disclosure are not limited thereto.

[0066] For example, as shown in FIG. 3, the display substrate further includes an organic layer 420. The organic layer 420 is located on the side of the inorganic layer 410 close to the substrate substrate BS and in contact with the inorganic layer 410, the organic layer 420 includes a plurality of organic structures 415, and the inorganic structure 405 includes a protruding portion 4051 protruding relative to the edge of the organic structure 415. For example, the organic layer 420 further includes a flat portion 425 located between the organic structure 415 and the substrate substrate BS, and the flat portion 425 is connected to the plurality of organic structures 415. For example, the flat portion 425 and the plurality of organic structures 415 are a one-piece structure. For example, the plurality of organic structures 415 in the organic layer 420 are formed in the process of manufacturing the inorganic structure 405. For example, in the process of patterning the inorganic structure 405 by etching solution, the part of the organic layer 420 overlapping with the inorganic layer 410 is etched together, and the inorganic structure 405 is formed at the same time to make the inorganic structure 405 have a protruding portion 4051 protruding relative to the edge of the organic structure 415.

[0067] For example, as shown in FIG. 3, the pixel defining portion 230 further includes a plurality of defining openings. There is a defining opening 220 between at least part of the adjacent sub-pixels 10, and the part of the protruding portion 4051 of the inorganic structure 405 exposed by the defining opening 220 serves as a partition portion 4050. The light-emitting functional layer 130 includes a plurality of film layers, and the partition portion 4050 is configured to partition at least one layer in the light-emitting functional layer 130. For example, at least part of the protruding portion 4051 of the inorganic structure 405 corresponding to one of the adjacent sub-pixels 10 is exposed by the defining opening 220 to serve as the partition portion 4050. For example, the orthographic projection of the defining opening 220 on the substrate substrate BS is substantially annular or strip-shaped, and surrounds the light-emitting area of the sub-pixel 10.

[0068] By setting the partitioning portion, at least one layer of the light-emitting functional layer between adjacent sub-pixels can be partitioned, and the risk of crosstalk between adjacent sub-pixels can be reduced. At the same time, since the slope angle μ between the at least partially surface of the pixel defining portion surrounding the light-emitting region of the sub-pixel on the side away from the substrate substrate and the first electrode is 25-35 degrees, the pixel defining portion can effectively support the manufacturing mask of the light-emitting functional layer to reduce the risk of the manufacturing mask contacting and scratching the light-emitting material in the light-emitting region of the sub-pixel.

[0069] For example, as shown in FIGS. 2 and 3, the display substrate includes at least two different colors of sub-pixels 10, and the protruding portion 4051 of the inorganic structure 405 corresponding to each of the at least one color of sub-pixels 10 is covered by the pixel defining portion 230. For example, as shown in FIG. 2, the inorganic structure 405 corresponding to the first sub-pixel 101 is not exposed by the defining opening 220, but is not limited thereto. For example, when the protruding portion 4051 of the inorganic structure 405 corresponding to the sub-pixel 10 is covered by the pixel defining portion 230, the distance (please refer to the distance T shown in FIG. 2) between the light-emitting region of the sub-pixel 10 and the adjacent defining opening 220 (i.e., the defining opening 220 exposing the protruding portion 4051 of the inorganic structure 405 corresponding to the adjacent sub-pixel 10) can be far, thereby facilitating the pixel defining portion 230 surrounding the light-emitting region of the sub-pixel 10 to have a larger setting space, so that the pixel defining portion 230 has a good topography, for example, can have a sufficient thickness, etc., to form a required slope angle (e.g., 25-35 degrees).

[0070] For example, as shown in FIG. 2, the plurality of sub-pixels 10 are arranged as a plurality of first sub-pixel groups 0010 and a plurality of second sub-pixel groups 0020 arranged alternately along a first arrangement direction X, the first sub-pixel group 0010 includes a second sub-pixel 102 and a third sub-pixel 103 arranged alternately along a second arrangement direction Y, and the second sub-pixel group 0020 includes a first sub-pixel 101 arranged along the second arrangement direction Y. For example, the light-emitting colors of the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103 are different from each other. The first arrangement direction X and the second arrangement direction Y intersect and are both parallel to the substrate substrate BS.

[0071] For example, as shown in FIG. 2, the first sub-pixel group 0010 and the second sub-pixel group 0020 are staggered in the second arrangement direction Y, and each of the at least partial third sub-pixels 103 is surrounded by eight sub-pixels 10, which include the first sub-pixels 101 and the second sub-pixels 102 arranged alternately. For example, the area of the light-emitting region of the first sub-pixel 101 and the area of the light-emitting region of the third sub-pixel 103 are both smaller than the area of the light-emitting region of the second sub-pixel 102, and the area of the light-emitting region of the first sub-pixel 103 is smaller than the area of the light-emitting region of the third sub-pixel 103.

[0072] For example, as shown in FIG. 2 and FIG. 3, the protruding part 4051 of the inorganic structure 405 corresponding to the first sub-pixel 101 is covered by the pixel defining part 230. For example, at least part of the protruding part 4051 of the inorganic structure 405 corresponding to the second sub-pixel 102 is exposed by the defined opening 220, and at least part of the protruding part 4051 of the inorganic structure 405 corresponding to the third sub-pixel 103 is exposed by the defined opening 220.

[0073] By making the protruding part of the inorganic structure corresponding to the first sub-pixel with a smaller light-emitting region not exposed by the defined opening, it is beneficial to make the pixel defining part surrounding the light-emitting region of the first sub-pixel have a large enough width, so as to make the part of the pixel defining part have a large enough thickness to form a required slope angle (for example, 25-35 degrees), so as to be beneficial to enhance the anti-scratching ability of the mask for manufacturing the light-emitting element.

[0074] For example, the width of the pixel defining part refers to the dimension of the cross section of the pixel defining part in the arrangement direction of the adjacent sub-pixels, which is cut by a plane perpendicular to the extension direction of the pixel defining part. For example, the extension direction of the pixel defining part can be a straight line direction or a broken line direction, which is not limited in the embodiments of the present disclosure.

[0075] FIG. 4 is a partial cross-sectional schematic view of another display substrate provided by at least one embodiment of the present disclosure. For example, the display substrate is different from the display substrate shown in FIG. 3 in that it further has at least one metal pattern 300, and the rest of the structures are the same. For details, please refer to the related description in the above embodiments, which will not be repeated here.

[0076] For example, as shown in FIG. 4, the sub-pixel 10 includes a pixel driving circuit 240, which is located between the first electrode 110 and the substrate BS, and is connected with the first electrode 110 to drive the light-emitting functional layer 130 to emit light. For example, the pixel driving circuit 240 can include a plurality of transistors and at least one capacitor (not shown in the figure), and the first electrode 110 can be electrically connected with the pixel driving circuit 240 through a connection via (not shown in the figure).

[0077] For example, as shown in FIG. 4, the display substrate further comprises at least one metal pattern 300, each metal pattern 300 is located between the first electrode 110 and at least part of the pixel driving circuit 240, and each metal pattern 300 comprises a plurality of metal structures 350. FIG. 4 is used as an example to illustrate that the display substrate comprises one metal pattern 300, but the embodiment of the present disclosure is not limited thereto, and the number of layers of the metal pattern 300 is not limited. For example, in the direction Z, the first electrode 110 of the sub-pixel 10 and the pixel driving circuit 240 of the sub-pixel 10 are both overlapped with the metal structure 350. For example, the metal structure 350 is located between the first electrode 110 of the sub-pixel 10 and the pixel driving circuit 240. For example, the plurality of metal structures 350 are arranged one-to-one with the plurality of sub-pixels 10. For example, the metal pattern 300 can be located in the same film layer as part of the structure of the pixel driving circuit 240. For example, the metal structure 350 is configured to transmit a direct current signal. For example, since the first electrode 110 of the sub-pixel 10 and the light emitting element 130 are relatively sensitive to signal fluctuations in the pixel driving circuit 240, for example, when the metal structure 350 is overlapped with at least one of the gate, source and drain in the pixel driving circuit 240, the metal structure 350 can shield the signal fluctuations (for example, signal fluctuations of key nodes or alternating current signals in the pixel driving circuit) of the above-mentioned structures in the pixel driving circuit 240, to reduce the risk of sub-pixel 10 displaying undesirable phenomena and the like.

[0078] For example, as shown in FIG. 4, the plurality of sub-pixels 10 in the display substrate comprise at least two different colors of sub-pixels 10, for example, a plurality of first sub-pixels 101 and a plurality of second sub-pixels 102. For example, the light emitting colors of the first sub-pixel 101 and the second sub-pixel 102 are different, for example, the first sub-pixel 101 can emit blue light, and the second sub-pixel 102 can emit green light, but the present disclosure is not limited thereto. For example, the light emitting colors of the first sub-pixel 101 and the second sub-pixel 102 can be interchanged. For example, the orthographic projection of the metal structure 350 overlapped with the first electrode 110 of each color of sub-pixel 10 on the substrate substrate BS all falls completely into the orthographic projection of the pixel opening 210 corresponding to the sub-pixel 10 on the substrate substrate BS. That is, the orthographic projection of the metal structure 350 overlapped with the first electrode 110 of each sub-pixel 10 in the different color sub-pixels 10 on the substrate substrate BS all falls completely into the orthographic projection of the pixel opening 210 corresponding to the sub-pixel 10 on the substrate substrate BS. The orthographic projection of the metal structure 350 overlapped with the first electrode 110 of any one of the first sub-pixel 101 and the second sub-pixel 102 on the substrate substrate BS falls completely into the orthographic projection of the pixel opening 210 corresponding to the sub-pixel 10 on the substrate substrate BS.

[0079] In this way, the metal structure corresponding to the sub-pixel of different color can have a uniform influence on the light emitting angle of the sub-pixel, for example, the pixel defining part around the pixel opening of the sub-pixel of different color can have a substantially same slope angle, thereby reducing the difference between the light emitting effects of the sub-pixels of different color.

[0080] For example, as shown in FIG. 4, the orthographic projection of the metal structure 350 overlapping the first electrode 110 of the sub-pixel 10 of at least one color on the substrate BS has a first distance L1 with the orthographic projection of the pixel defining part 230 around the light emitting area of the sub-pixel 10 on the substrate BS, and the first distance L1 is not less than 4 microns.

[0081] For example, as shown in FIG. 4, the orthographic projection area of the metal structure 350 overlapping the first electrode 110 of the second sub-pixel 102 on the substrate BS is less than the orthographic projection area of the pixel opening 210 corresponding to the second sub-pixel 102 on the substrate BS, and the distance between the metal structure 350 and the pixel opening 210 corresponding to the second sub-pixel 102 is the first distance L1. For example, the first distance L2 can be 4.2 microns, 4.5 microns, 4.8 microns or 5 microns, and the embodiments of the present disclosure are not limited thereto.

[0082] In this way, the influence of the metal structure on the topography of the pixel defining part around the light emitting area of the sub-pixel can be reduced, for example, the slope angle of the pixel defining part can be substantially unaffected by the metal structure, thereby reducing the requirement for manufacturing process and facilitating the control of the slope angle of the pixel defining part within the range of 25-35 degrees.

[0083] FIG. 4 illustrates the second sub-pixel 102, but the embodiments of the present disclosure are not limited thereto. For example, the orthographic projection of the metal structure 350 overlapping the first electrode 110 of the first sub-pixel 101 on the substrate BS also has the above-mentioned first distance L1 with the orthographic projection of the pixel opening 210 corresponding to the first sub-pixel 101 on the substrate BS.

[0084] In this way, the pixel defining part around the light emitting area of the sub-pixel of different color can have a uniform slope angle, and the manufacturing difficulty can be effectively reduced, so that the slope angle of the pixel defining part around the pixel opening corresponding to the sub-pixel of different color can be easily controlled.

[0085] FIG. 5 is a partial cross-sectional schematic view of another display substrate provided by at least one embodiment of the present disclosure. For example, the display substrate shown in FIG. 5 is different from the display substrate shown in FIG. 4 in that the metal pattern is different, and the rest of the structures are the same. For details, please refer to the related description in the above embodiments, which will not be repeated here.

[0086] For example, as shown in FIG. 5, the plurality of sub-pixels 10 include sub-pixels 10 of at least two different colors, and the metal structure 350 overlapping the first electrode 110 of the sub-pixel 10 of at least one color includes a portion located outside the pixel opening 210 corresponding to the corresponding sub-pixel 10. For example, the area of the orthogonal projection of the metal structure 350 overlapping the first electrode 110 of the first sub-pixel 101 on the substrate substrate BS is greater than the area of the orthogonal projection of the pixel opening 210 corresponding to the first sub-pixel 101 on the substrate substrate BS.

[0087] By making the area of the orthogonal projection of the metal structure overlapping the first electrode of the sub-pixel of at least one color on the substrate substrate larger and greater than the area of the orthogonal projection of the pixel opening corresponding to the sub-pixel on the substrate substrate, the shielding effect of the signal fluctuation in the pixel driving circuit of the sub-pixel can be enhanced, so as to reduce the adverse effects of the signal fluctuation in the pixel driving circuit on the light-emitting element and the first electrode of the sub-pixel, thereby facilitating the sub-pixel to have good light-emitting effect, and at the same time, it is also beneficial to simplify the manufacturing process of the metal structure.

[0088] For example, as shown in FIG. 5, the protruding portion 4051 of the inorganic structure 405 overlapping the first electrode 110 of each sub-pixel 10 of the sub-pixel 10 of one color is covered by the pixel defining portion 230, and the metal structure 350 overlapping the first electrode 110 of the sub-pixel 10 of the color includes a portion located outside the pixel opening 210 corresponding to the corresponding sub-pixel 10. For example, the above-mentioned sub-pixel 10 of one color is the first sub-pixel 101, but is not limited thereto. For example, the metal structure 350 overlapping the first electrode 110 of the above-mentioned sub-pixel 10 of one color is not limited to one layer of metal structure, for example, can be a plurality of layers of metal structure, such as two layers of metal structure, and the embodiments of the present disclosure do not limit this.

[0089] For example, as shown in FIG. 5, the area of the orthogonal projection of the metal structure 350 overlapping the first electrode 110 of the first sub-pixel 101 on the substrate substrate BS is greater than the area of the orthogonal projection of the first electrode 110 on the substrate substrate BS. For example, in the arrangement direction of the first sub-pixel 101 and the second sub-pixel 102, as shown in the direction R1 in FIG. 5, the metal structure 350 overlapping the first electrode 110 of the first sub-pixel 101 protrudes relative to the first electrode 110, thereby effectively shielding the signal fluctuation in the pixel driving circuit 240. For example, the protruding portion 4051 of the inorganic structure 405 corresponding to the first sub-pixel 101 is not exposed by the opening 220, thereby facilitating the pixel defining portion 230 surrounding the pixel opening 210 corresponding to the first sub-pixel 101 to have a good topography, for example, can have a slope angle of 25-35 degrees.

[0090] For example, as shown in FIG. 5, the metal structure 350 overlapping the first electrode 110 of a sub-pixel 10 of one color includes a portion located outside the pixel opening 210 corresponding to the sub-pixel 10 of the one color, and the sub-pixel 10 of the one color emits green light. For example, the sub-pixel 10 of the one color is the first sub-pixel 101, but is not limited thereto.

[0091] For example, as shown in FIG. 2 and FIG. 5, the display substrate includes a plurality of first sub-pixels 101, a plurality of second sub-pixels 102, and a plurality of third sub-pixels 103. The area of the light emitting region of the first sub-pixel 101 is smaller than the area of the light emitting region of the third sub-pixel 103, and the area of the light emitting region of the third sub-pixel 103 is smaller than the area of the light emitting region of the second sub-pixel 102. For example, the first sub-pixel 101 is configured to emit green light, the second sub-pixel 102 is configured to emit blue light, and the third sub-pixel 103 is configured to emit red light, but is not limited thereto, for example, the light emitting colors of the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103 can be interchanged, and the embodiments of the present disclosure do not limit this. For example, the normal projection of the metal structure 350 overlapping the first electrode 110 of any one of the second sub-pixel 102 and the third sub-pixel 103 on the substrate BS falls within the normal projection of the pixel opening 210 corresponding to the sub-pixel 102 on the substrate BS.

[0092] For example, by making the metal structure overlapping the first electrode of the first sub-pixel with the smallest light emitting region area include a portion located outside the pixel opening corresponding to the first sub-pixel, the manufacturing process of the metal structure can be simplified while ensuring that the pixel defining portion around the pixel opening corresponding to the first sub-pixel has a slope angle of 25-35 degrees, and the shielding effect on signal fluctuations in the pixel driving circuit of the first sub-pixel is enhanced.

[0093] FIG. 6 is a partial cross-sectional schematic view of another display substrate provided by at least one embodiment of the present disclosure. For example, the display substrate shown in FIG. 6 is different from the display substrate shown in FIG. 4 in that the metal pattern is different, and the remaining structures are the same. For details, please refer to the related descriptions in the above embodiments, which will not be repeated here.

[0094] For example, as shown in FIG. 6, the at least one metal pattern 300 includes a first metal pattern 310 and a second metal pattern 320, and the second metal pattern 320 is located between the first metal pattern 310 and at least part of the pixel driving circuit 240 of the sub-pixel 10. For example, the second metal pattern 320 is located between the first metal pattern 310 and the pixel driving circuit 240 of the sub-pixel 10. For example, in the direction Z, the metal structure 350 of the first metal pattern 310 at least partially overlaps the metal structure 350 of the second metal pattern 320. For example, the plurality of metal structures 350 of the first metal pattern 310 one-to-one correspond to the plurality of sub-pixels 10, and one-to-one correspond to the plurality of metal structures 350 of the second metal pattern 320. For example, the metal structure 350 of the first metal pattern 310 and the metal structure 350 of the second metal pattern 320 overlap each other. For example, the metal structure 350 of the first metal pattern 310 can be arranged in the same layer as the data line, and the metal structure 350 of the second metal pattern 320 can be arranged in the same layer as the power signal line, but embodiments of the present disclosure are not limited thereto. In some embodiments, the metal structure 350 of the second metal pattern 320 can also be arranged in the same layer as the gate line. For example, the first metal structure 350 is located on the side away from the substrate BS of the corresponding shielded structure in the pixel driving circuit 240. For example, when the shielded structure in the pixel driving circuit 240 is located in a layer where the gate line is located, the metal structure 350 shielding the structure is located on the side away from the substrate BS of the structure.

[0095] In this way, the signal fluctuation in the pixel driving circuit can be shielded by the metal structure in the first metal pattern and the metal structure in the second metal pattern at the same time, so that the influence of the signal fluctuation in the pixel driving circuit can be effectively reduced, so that the sub-pixel has good light emitting effect.

[0096] For example, as shown in FIG. 6, the pixel opening 210 corresponding to the sub-pixel 10 has a first orthogonal projection on the substrate BS, each of the at least part of the metal structures 350 of the at least one of the first metal pattern 310 and the second metal pattern 320 has a second orthogonal projection on the substrate BS, the second orthogonal projection falls into the first orthogonal projection, and an area of the second orthogonal projection is less than an area of the first orthogonal projection. For example, each of the at least part of the metal structures 350 of the first metal pattern 310 or the second metal pattern 320 has the above-mentioned second orthogonal projection on the substrate BS. For example, each of the at least part of the metal structures 350 of the first metal pattern 310 and the at least part of the metal structures 350 of the second metal pattern 320 has the above-mentioned second orthogonal projection on the substrate BS. For example, each of the metal structures 350 of the first metal pattern 310 has the above-mentioned second orthogonal projection on the substrate BS. For example, a distance between the second orthogonal projection and the first orthogonal projection is a first distance L1, i.e., no less than 4 microns.

[0097] Therefore, by making each of the metal structures of the first metal pattern and the at least part of the metal structures of the second metal pattern have a second orthogonal projection on the substrate BS, and the second orthogonal projection falls into the first orthogonal projection of the pixel opening on the substrate BS, the influence of the arrangement of the metal structures on the topography of the pixel defining portion surrounding the pixel opening can be reduced while shielding the signal fluctuation in the pixel driving circuit by the first metal structure and the second metal structure together, thereby reducing the influence on the light emission of the light emitting element of the sub-pixel, and facilitating the pixel defining portion to have a good and uniform slope angle to reduce the scratching of the mask on the light emitting material located in the pixel opening during the manufacturing process of the light emitting element.

[0098] For example, as shown in FIG. 6, the orthogonal projection of the metal structure 350 in the first metal pattern 310 on the substrate BS falls into the first orthogonal projection, and the orthogonal projection of the metal structure 350 in the second metal pattern 320 on the substrate BS includes a part outside the first orthogonal projection. For example, the orthogonal projection area of the metal structure 350 in the first metal pattern 310 on the substrate BS is less than the orthogonal projection area of the metal structure 350 in the second metal pattern 320 on the substrate BS. For example, the orthogonal projection of the metal structure 350 in the first metal pattern 310 on the substrate BS is the above-mentioned second orthogonal projection.

[0099] Thus, the metal structure in the first metal pattern is closer to the light emitting element of the sub-pixel than the metal structure in the second metal pattern, so that the signal fluctuation in the pixel driving circuit can be effectively shielded by the metal structure of the second metal pattern with a larger area of orthographic projection on the substrate, and meanwhile, the influence on the topography of the pixel defining portion can be reduced by the metal structure in the first metal pattern with the above-mentioned smaller second orthographic projection, so that the pixel defining portion can effectively support the manufacturing mask of the light emitting element to reduce the scratching of the light emitting material located in the pixel opening.

[0100] FIG. 7 is a partial cross-sectional schematic view of a display substrate provided by at least one embodiment of the present disclosure. For example, the display substrate shown in FIG. 7 is different from the display substrate shown in FIG. 4 in that the metal patterns are different, and the rest of the structures are the same. For details, please refer to the related descriptions in the above embodiments, which will not be repeated here.

[0101] For example, as shown in FIG. 7, the display substrate includes a metal pattern 300 between the first electrode 110 and at least part of the pixel driving circuit 240. For example, the at least one metal pattern 300 includes a first metal portion 301 and a second metal portion 302 corresponding to each sub-pixel 10. In the Z direction, the first metal portion 301 corresponding to the sub-pixel 10 overlaps the first electrode 110 of the sub-pixel 10, and the second metal portion 302 corresponding to the sub-pixel 10 overlaps the pixel defining portion 230 surrounding the pixel opening 210 corresponding to the sub-pixel 10.

[0102] For example, as shown in FIG. 7, the metal pattern 300 includes a plurality of first metal portions 301 and a plurality of second metal portions 302. For example, the plurality of first metal portions 301 correspond to the plurality of sub-pixels 10 one by one. For example, the orthographic projection area of the first metal portion 301 on the substrate BS is smaller than the orthographic projection area of the light emitting area of the sub-pixel 10 on the substrate BS. For example, the orthographic projection of the first metal portion 301 on the substrate BS does not overlap the orthographic projection of the edge of the light emitting area of the sub-pixel 10 on the substrate BS. For example, the orthographic projection of the first metal portion 301 on the substrate BS falls completely into the orthographic projection of the light emitting area of the sub-pixel 10 on the substrate BS.

[0103] For example, as shown in FIG. 7, the second metal part 302 surrounds the light emitting area of the sub-pixel 10. For example, the light emitting area of one sub-pixel 10 can be surrounded by multiple second metal parts 302, or can be surrounded by one annular second metal part 302. For example, one second metal part 302 can be arranged between adjacent sub-pixels 10. For example, the orthographic projection of the second metal part 302 surrounding the light emitting area of the sub-pixel 10 on the substrate BS can be a non-closed annular shape. For example, the first metal part 301 corresponding to the sub-pixel 10 refers to the first metal part 301 overlapping the light emitting area of the sub-pixel 10, and the second metal part 302 corresponding to the sub-pixel 10 refers to the second metal part 302 surrounding the light emitting area of the sub-pixel 10 and overlapping the pixel defining part 230 surrounding the light emitting area of the sub-pixel 10. For example, in the arrangement direction of the adjacent sub-pixels 10 (such as the second sub-pixel 102 and the first sub-pixel 101 shown in FIG. 7), that is, in the direction R1, the cross section of the pixel defining part 230 parallel to the arrangement direction of the adjacent sub-pixels 10 and perpendicular to the plane of the substrate BS has a first size in the direction R1, and the second metal part 302 has a second size in the direction R1, and the second size is smaller than the first size.

[0104] For example, as shown in FIG. 7, there is a spacing SP between the first metal part 301 and the second metal part 302 corresponding to the sub-pixel 10, and the edge of the pixel defining part 230 surrounding the pixel opening 210 corresponding to the sub-pixel 10 close to the first metal part 301 does not overlap the metal pattern 300. For example, taking the second sub-pixel 102 shown in FIG. 7 as an example, the distance between the first metal part 301 and the second metal part 302 corresponding to the second sub-pixel 102 (that is, the size of the spacing SP in the direction R1) is L0, the distance between the first metal part 301 and the pixel opening 210 corresponding to the second sub-pixel 102 is W1, and the distance between the second metal part 302 and the pixel opening 210 corresponding to the second sub-pixel 102 is W2. For example, W1 can be substantially equal to W2.

[0105] In this way, the support of the first metal part and the second metal part on the edge of the pixel defining part surrounding the pixel opening corresponding to the sub-pixel can be reduced, thereby facilitating the increase of the slope angle between at least part of the surface of the pixel defining part on the side of the first electrode away from the substrate and the first electrode, so that the support ability of the pixel defining part to the manufacturing mask of the light emitting element is stronger, so as to reduce the scratching of the manufacturing mask to the light emitting material in the pixel opening.

[0106] FIG. 8 is a partial cross-sectional schematic view of another display substrate provided by at least one embodiment of the present disclosure. For example, the display substrate shown in FIG. 8 is different from the display substrate shown in FIG. 3 in that the inorganic layer is different, and the rest of the structures are the same. For details, please refer to the related description in the above embodiments, which will not be repeated here.

[0107] For example, as shown in FIG. 2 and FIG. 8, the edge of the protruding portion 4051 covered by the pixel defining portion 230 and the pixel opening 210 corresponding to the corresponding sub-pixel 10 has a second distance L2, and the second distance L2 is not less than 1 / 2 of the size L3 of the pixel defining portion 230 in the direction of the second distance L2. For example, the size of each sub-pixel 10 in the direction of the second distance L2 is substantially the same. For example, the inorganic structure 405 corresponding to the sub-pixel 10 refers to the inorganic structure 405 overlapping with the first electrode 110 of the sub-pixel 10. For example, as shown in FIG. 8, the protruding portion 4051 of the inorganic structure 405 corresponding to the first sub-pixel 101 is not exposed by the limiting opening 220, but is completely covered by the pixel defining portion 230. Therefore, at least part of the protruding portion 4051 of the inorganic structure 405 corresponding to the sub-pixel 10 (for example, the second sub-pixel 102) adjacent to the first sub-pixel 101 is exposed by the limiting opening 220 as a partition portion 4050.

[0108] For example, as shown in FIG. 8, the distance between the edge of the inorganic structure 405 corresponding to the first sub-pixel 101 and the pixel opening 210 corresponding to the first sub-pixel 101 is a second distance L2, and the second distance L2 is greater than or equal to 1 / 2 of the size L3 of the pixel defining portion 230 surrounding the light-emitting area of the first sub-pixel 101 in the direction of the second distance L2. For example, the second distance L2 can be 2 / 3 of the above-mentioned size L3, but is not limited thereto. For example, the above-mentioned second distance L2 can be at least one of 1-15 microns, such as 1-3 microns, 3-5 microns, 5-10 microns, 10-12 microns, and 12-15 microns, or can be other values in the range of 1-15 microns. For example, the second distance L2 is not more than 1 / 2 of the size of the light-emitting area of the sub-pixel in the direction R1, and the embodiments of the present disclosure do not limit this.

[0109] In this way, the at least part of the pixel defining portion is supported by the inorganic structure, for example, most of the pixel defining portion surrounding the light-emitting area of the sub-pixel is located on the side of the inorganic structure away from the substrate, which is conducive to making the part of the pixel defining portion on the inorganic structure have a large enough thickness, thereby facilitating the at least part of the surface of the pixel defining portion on the side of the first electrode away from the substrate to form a large enough slope angle with the first electrode, so as to improve the anti-scratching ability of the mask for manufacturing the light-emitting element.

[0110] FIG. 9 is a schematic diagram of a partial planar structure of another display substrate provided by at least one embodiment of the present disclosure; and FIG. 10 is a schematic diagram of a partial cross-sectional structure along the line B-B' shown in FIG. 9.

[0111] For example, as shown in FIGS. 9 and 10, the display substrate includes an inorganic layer 410 and an organic layer 420, the inorganic layer 410 is located on the substrate substrate BS, and the inorganic layer 410 includes a plurality of first partition structures 413. The organic layer 420 is located on the side of the inorganic layer 410 close to the substrate substrate BS and in contact with the inorganic layer 410, and the organic layer 420 includes a plurality of second partition structures 423. The first partition structure 413 and the second partition structure 423 are both located between adjacent sub-pixels 10, and the first partition structure 413 includes a protruding portion 4051 protruding relative to the edge of the second partition structure 423. The first partition structure 413 and the second partition structure 423 are both spaced apart from the pixel defining portion 230.

[0112] For example, as shown in FIGS. 9 and 10, the light emitting functional layer 130 includes a plurality of film layers, the pixel defining layer 200 includes a plurality of defining openings 220, each defining opening 220 is located between adjacent sub-pixels 10, and the protruding portion 4051 of the first partition structure 413 is exposed by the defining opening 220 to partition at least one layer in the light emitting functional layer 130. For example, at least one layer in the light emitting functional layer 130 of adjacent sub-pixels 10 is partitioned by the protruding portion 4051 of the first partition structure 413, so that the risk of crosstalk between adjacent sub-pixels 10 can be reduced.

[0113] For example, as shown in FIG. 9, the inorganic layer 410 includes a plurality of inorganic structures 405, the organic layer 420 includes a plurality of organic structures 415, and the inorganic structure 405 protrudes relative to the edge of the organic structure 415. For example, the first electrode 110 of the sub-pixel 10 is located on the surface of the inorganic structure 405 away from the substrate substrate BS, and the inorganic structure 405 can make the sub-pixel 10 have good electrode flatness. For example, the organic layer 420 further includes a portion 427 other than the organic structure 415 and the second partition structure 423, and the portion 427 is an integral structure with the organic structure 415 and the second partition structure 423. For example, the inorganic structure 405 and the first partition structure 413 can be formed by the same process. For example, the organic structure 415 and the second partition structure 423 can be made by the same process. For example, when the inorganic layer 410 is patterned to form the inorganic structure 405 and the first partition structure 413, the etching solution etches the portion of the organic layer 420 in contact with the inorganic layer 410 together, thereby forming the organic structure 415 and the second partition structure 423.

[0114] By arranging the first partition structure and the second partition structure for partitioning at least one layer of the light-emitting functional layer between adjacent sub-pixels, the width of the pixel defining part can be increased, and the pixel defining part can have a good profile, for example, the pixel defining part can have a large enough slope angle between at least part of the surface of the first electrode away from the substrate and the first electrode, so that the manufacturing mask of the light-emitting functional layer can be effectively supported to reduce the scratch of the manufacturing mask on the light-emitting material in the pixel opening.

[0115] For other structures in the display substrate shown in FIGS. 9 and 10, please refer to the related descriptions of the above embodiments, which will not be repeated here.

[0116] FIG. 11 is a schematic diagram of a partial planar structure of another display substrate provided by at least one embodiment of the present disclosure; and FIG. 12 is a schematic diagram of the display substrate shown in FIG. 11 when a mask is arranged in the manufacturing process.

[0117] For example, referring to FIGS. 9 and 11, the display substrate can further include a plurality of support structures 700 on the substrate BS. The support structure 700 is located on one side of the pixel opening 210 corresponding to the sub-pixel 10, and at least part of the surface of the support structure 700 away from the substrate BS is farther away from the substrate BS than the pixel defining part 230. For example, the support structure 700 is configured to support a mask, for example, a mask for forming the light-emitting functional layer 130. For example, the support structure 700 can be located in the pixel defining layer 200. For example, the support structure 700 can be part of the pixel defining layer 200. For example, the support structure 700 is located between adjacent sub-pixels 10, but is not limited thereto.

[0118] For example, referring to FIG. 12, in the Z direction, the difference between the maximum size of the support structure 700 and the maximum size of the pixel defining part 230 is at least 0.5 microns, such as 0.8 microns, 0.1 microns, and embodiments of the present disclosure are not limited thereto. Thus, the support structure 700 can effectively support the mask 710 to reduce the scratch of the mask 710 on the light-emitting material in the pixel opening 210.

[0119] FIG. 13 is a schematic diagram of a manufacturing process of a pixel defining layer in a display substrate.

[0120] For example, as shown in FIG. 13, the pixel defining material 0200 forms the pixel defining layer after exposure treatment by the mask 610. The mask 610 includes a plurality of mask openings 601, and after the exposure treatment of the pixel defining material 0200, the mask opening 601 has a third distance Lm between the orthographic projection of the mask opening 601 on the substrate BS and the orthographic projection of the pixel opening 210 on the substrate BS.

[0121] FIG. 14 is a light path diagram when the pixel defining material is exposed through the mask; and FIG. 15 is a plan view of the pixel defining layer obtained after the pixel defining material is exposed.

[0122] For example, referring to FIG. 14 and FIG. 15, the incident point E0 of the incident light ray E1 on the first electrode 110 corresponds to the edge of the light emitting area of the sub-pixel 10, the incident light ray E1 is reflected on the surface of the first electrode 110 after reaching the incident point E0, and then exits as the exit light ray E2. Similarly, the exit light ray E3 is the exit light ray after another incident light ray is reflected on the surface of the first electrode 110. For example, the portion of the pixel defining material on the side away from the substrate BS of the exit light ray E2, the portion of the pixel defining material on the side away from the substrate BS of the exit light ray E3, and the portion in the mask opening 601 are removed to form the pixel defining layer 200 as shown in FIG. 15. For example, the maximum angle between the incident light ray E1 and the exit light ray E2 is β1. For example, at least part of the surface of the pixel defining portion 230 on the side away from the substrate BS of the first electrode 110 has a first slope angle with the first electrode 110.

[0123] FIG. 16 is a schematic diagram of a manufacturing process of a pixel defining layer in a display substrate according to at least one embodiment of the present disclosure.

[0124] For example, as shown in FIG. 16, the pixel defining material 0200 forms a pixel defining layer after being exposed through the mask 620. The mask 610 includes a plurality of mask openings 602, and after the pixel defining material 0200 is exposed, the orthographic projection of the mask opening 602 on the substrate BS has a third distance Lm with the orthographic projection of the pixel opening 210 on the substrate BS, and the third distance Lm is not greater than 2 microns, for example, the third distance Lm can be 1 micron to 1.5 microns, such as 1.2 microns, 1.3 microns or 1.4 microns, and the embodiments of the present disclosure are not limited thereto. For example, compared with the mask 610 shown in FIG. 13, the third distance Lm corresponding to the mask opening 602 of the mask 620 shown in FIG. 16 is smaller.

[0125] FIG. 17 is a light path diagram when the pixel defining material is exposed through the mask according to at least one embodiment of the present disclosure.

[0126] For example, referring to FIG. 15 and FIG. 17, when the portions of the pixel defining material located on the side away from the substrate BS of the emergent light ray E2, the portions of the pixel defining material located on the side away from the substrate BS of the emergent light ray E3, and the portions of the pixel defining material located in the mask opening 601 are all removed, the maximum angle β2 between the incident light ray E1 and the emergent light ray E2 is smaller than the maximum angle β1 shown in FIG. 14, so that the finally formed pixel defining part 230 can have a second slope angle between at least part of the surface of the first electrode 110 on the side away from the substrate BS and the first electrode 110, and the second slope angle is greater than the first slope angle.

[0127] Therefore, by reducing the third distance corresponding to the mask opening, it is beneficial to increase the slope angle corresponding to the finally formed pixel defining part, and further beneficial to enhance the support ability of the pixel defining part to the manufacturing mask of the light emitting functional layer, so as to reduce the scratching of the light emitting material located in the pixel opening by the manufacturing mask.

[0128] Another embodiment of the present disclosure provides a display panel, which comprises any of the display substrates described above. Therefore, the technical effects of the display substrate described above can also be embodied on the display panel, which will not be described here again. For example, the display panel can further comprise an enhance efficiency structure (EES) located on the display substrate (for example, on the encapsulation layer thereof), so as to enhance the light extraction efficiency. For example, the display panel can further comprise a color film, for example, the color film can be located on the side away from the display substrate of the EES, but is not limited thereto, and the color intensity of the light can be enhanced by arranging the color film. For example, the display panel can further comprise other film layers, which are not limited by the embodiments of the present disclosure.

[0129] FIG. 18 is a schematic block diagram of a display device provided by at least one embodiment of the present disclosure.

[0130] As shown in FIG. 18, another embodiment of the present disclosure provides a display device, which comprises any of the display substrates described above. Therefore, the technical effects of the display substrate described above can also be embodied on the display device, which will not be described here again.

[0131] For example, the display device further comprises a cover plate located on the light emitting side of the display substrate.

[0132] For example, the display device can be a display device such as an organic light emitting diode display device, and any product or component having a display function such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, a navigator, and the like, which are not limited by the embodiments of the present disclosure.

[0133] The following points need to be explained:

[0134] (1) In the drawings of the embodiments of the present disclosure, only structures related to the embodiments of the present disclosure are involved, and other structures can be referred to general designs.

[0135] (2) In the case of no conflict, the features in the same embodiment and different embodiments of the present disclosure can be combined with each other.

[0136] The above only describes exemplary embodiments of the present disclosure, and is not used to limit the protection scope of the present disclosure, and the protection scope of the present disclosure is determined by the appended claims.

Claims

1. A display substrate, comprising: a substrate substrate; a plurality of sub-pixels on the substrate substrate, each of the sub-pixels comprising a light-emitting functional layer, and a first electrode and a second electrode on both sides of the light-emitting functional layer in a direction perpendicular to the substrate substrate, the first electrode being between at least part of the light-emitting functional layer and the substrate substrate, a pixel defining layer between the light-emitting functional layer and the substrate substrate, the pixel defining layer comprising a plurality of pixel openings and a pixel defining portion between adjacent pixel openings, the pixel openings exposing at least part of the first electrode, the light-emitting functional layer being in contact with the first electrode through the pixel openings, wherein at least part of a surface of the pixel defining portion on a side of the first electrode away from the substrate substrate has a slope angle with the first electrode, the slope angle being 25-35 degrees, and a maximum distance between a surface of the pixel defining portion on a side of the pixel defining portion away from the substrate substrate and the substrate substrate is greater than a maximum distance between a surface of the light-emitting functional layer in the pixel openings on a side of the light-emitting functional layer away from the substrate substrate and the substrate substrate in a direction perpendicular to the substrate substrate, the sub-pixels comprising a pixel driving circuit between the first electrode and the substrate substrate, the pixel driving circuit being electrically connected to the first electrode to drive the light-emitting functional layer to emit light, the display substrate further comprising at least one metal pattern between at least part of the first electrode and the pixel driving circuit, each of the metal patterns comprising a plurality of metal structures, the first electrode of the sub-pixel and the pixel driving circuit of the sub-pixel both overlapping the metal structures in a direction perpendicular to the substrate substrate, the plurality of sub-pixels comprising at least two sub-pixels of different colors, a normal projection of the metal structures overlapping the first electrode of each color of sub-pixel on the substrate substrate falling completely within a normal projection of the pixel opening corresponding to the respective sub-pixel on the substrate substrate, a normal projection of the metal structures overlapping the first electrode of at least one color of sub-pixel on the substrate substrate having a first distance with a normal projection of the pixel defining portion surrounding the pixel opening corresponding to the sub-pixel on the substrate substrate, the first distance being not less than 4 microns, the plurality of sub-pixels comprising at least two sub-pixels of different colors, the metal structures overlapping the first electrode of at least one color of sub-pixel comprising a portion outside the pixel opening corresponding to the respective sub-pixel, the at least one color of sub-pixel being sub-pixels of one color, and the one color being green, the at least one metal pattern comprising a first metal pattern and a second metal pattern, the second metal pattern being between the first metal pattern and at least part of the pixel driving circuit of the sub-pixel, the metal structures of the first metal pattern at least partially overlapping the metal structures of the second metal pattern in a direction perpendicular to the substrate substrate. ​ ​ ​ ​ 2.The display substrate of claim 1, wherein, ​ 3.The display substrate according to claim 1 or 2, wherein, ​ ​ ​ 4. The display substrate according to any one of claims 1 to 3, wherein ​ 5.The display substrate of claim 4, wherein, ​ 6.The display substrate of claim 3, wherein, ​ 7.The display substrate of claim 6, wherein, ​ 8.The display substrate of claim 3, wherein, ​ ​ 9.The display substrate of claim 8, wherein, The pixel opening corresponding to the sub-pixel has a first orthographic projection on the substrate, each of at least part of the metal structures of at least one of the first metal pattern and the second metal pattern has a second orthographic projection on the substrate, The second orthographic projection falls into the first orthographic projection, and an area of the second orthographic projection is smaller than an area of the first orthographic projection. 10.The display substrate of claim 8, wherein, The pixel opening corresponding to the sub-pixel has a first orthographic projection on the substrate, The orthographic projection of the metal structure in the first metal pattern on the substrate falls into the first orthographic projection, and the orthographic projection of the metal structure in the second metal pattern on the substrate includes a part outside the first orthographic projection. 11.The display substrate according to claim 1 or 2, wherein The sub-pixel includes a pixel driving circuit, the pixel driving circuit is located between the first electrode and the substrate, and the pixel driving circuit is electrically connected with the first electrode to drive the light-emitting functional layer to emit light. The display substrate further includes a metal pattern, the metal pattern is located between at least part of the first electrode and the pixel driving circuit, at least one layer of the metal pattern includes a first metal part and a second metal part corresponding to each of the sub-pixels, in a direction perpendicular to the substrate, the first metal part corresponding to the sub-pixel overlaps with the first electrode of the sub-pixel, and the second metal part corresponding to the sub-pixel overlaps with the pixel defining part surrounding the pixel opening corresponding to the sub-pixel, The first metal part and the second metal part corresponding to the sub-pixel have a spacing, and in a direction perpendicular to the substrate, an edge of the pixel defining part surrounding the pixel opening of the sub-pixel close to the first metal part does not overlap with the metal pattern.

12. The display substrate of claim 1 or 2, further comprising: an inorganic layer located between the first electrode of the sub-pixel and the substrate, the inorganic layer including a plurality of inorganic structures, at least part of the inorganic structures being located in the pixel opening corresponding to the sub-pixel; an organic layer located between the inorganic layer and the substrate and in contact with the inorganic layer, the organic layer including a plurality of organic structures, the inorganic structures including a protruding part protruding relative to an edge of the organic structure, wherein the light-emitting functional layer includes a plurality of film layers, at least part of the protruding part of the inorganic structure exposed by a defined opening between adjacent sub-pixels in at least part of the sub-pixels serves as a partition part, and the partition part is configured to partition at least one layer in the light-emitting functional layer. 13.The display substrate of claim 12, wherein, The plurality of sub-pixels include sub-pixels of at least two different colors, and the protruding part of the inorganic structure corresponding to each of the sub-pixels of at least one color is covered by the pixel defining part. 14.The display substrate of claim 13, wherein, An edge of the protruding part covered by the pixel defining part and the pixel opening corresponding to the corresponding sub-pixel have a second distance, and the second distance is not less than 1 / 2 of a size of the pixel defining part in a direction where the second distance is located. 15.The display substrate of claim 14, wherein, The second distance is 1-15 microns. 16.The display substrate of claim 13, wherein, The at least two different color sub-pixels include a first sub-pixel and a second sub-pixel, an area of a light emitting region of the first sub-pixel is smaller than an area of a light emitting region of the second sub-pixel, The protruding part of the inorganic structure corresponding to the first sub-pixel is covered by the pixel defining part. 17.The display substrate of claim 13, wherein, Each of the sub-pixels includes a pixel driving circuit, the pixel driving circuit is located between the first electrode and the substrate, the pixel driving circuit is electrically connected with the first electrode to drive the light emitting functional layer to emit light, The display substrate further includes at least one layer of metal pattern, the at least one layer of metal pattern is located between the first electrode and at least part of the pixel driving circuit, each layer of the metal pattern includes a plurality of metal structures, in a direction perpendicular to the substrate, the first electrode of the sub-pixel and the pixel driving circuit of the sub-pixel overlap with the metal structure, The protruding part of the inorganic structure overlapping with the first electrode of each of the sub-pixels of a sub-pixel of one color is covered by the pixel defining part, and the metal structure overlapping with the first electrode of the sub-pixel of the color includes a part located outside the pixel opening corresponding to the corresponding sub-pixel.

18. The display substrate of claim 1 or 2, further comprising: an inorganic layer located on the substrate, the inorganic layer including a plurality of first partition structures; an organic layer located on a side of the inorganic layer close to the substrate and in contact with the inorganic layer, the organic layer including a plurality of second partition structures, wherein the first partition structures and the second partition structures are both located between adjacent sub-pixels, the first partition structures include protruding parts protruding relative to edges of the second partition structures, and the first partition structures and the second partition structures are both spaced apart from the pixel defining part, the light emitting functional layer includes a plurality of film layers, and the pixel defining layer includes a plurality of defining openings, each of the defining openings being located between adjacent sub-pixels, and the protruding parts of the first partition structures being exposed by the defining openings to partition at least one of the film layers.

19. The display substrate according to any one of claims 1-18, wherein, The pixel defining material is formed into the pixel defining layer after exposure treatment by a mask, the mask including a plurality of mask openings, after the exposure treatment of the pixel defining material, a normal projection of the mask openings on the substrate and a normal projection of the pixel openings in the pixel defining layer on the substrate have a third distance therebetween, and the third distance is no greater than 2 microns. 20.The display substrate of claim 19, wherein, The third distance is 1-1.5 microns.

21. The display substrate of any one of claims 1-20, further comprising a plurality of support structures located on the substrate and located on a side of the pixel opening corresponding to the sub-pixel, wherein at least part of a surface of the support structure away from the substrate is farther away from the substrate than a surface of the pixel defining part away from the substrate, and in a direction perpendicular to the substrate, a difference between a maximum dimension of the support structure and a maximum dimension of the pixel defining part is at least 0.5 microns.

22. A display panel comprising the display substrate according to any one of claims 1 to 21.

23. A display device comprising the display substrate according to any one of claims 1 to 21.

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