Display substrate, display panel and display device

Abstract

The invention discloses a display substrate, a display panel and a display device. The display substrate comprises a substrate body, a plurality of sub-pixels and a pixel limiting layer, the sub-pixels are located on the substrate body, each sub-pixel comprises a light-emitting functional layer, a first electrode and a second electrode, the first electrode and the second electrode are located on the two sides of the light-emitting functional layer in the direction perpendicular to the substrate body, the first electrode is located between at least part of the light-emitting functional layer and the substrate body, and the second electrode is located between at least part of the light-emitting functional layer and the pixel limiting layer. The pixel limiting layer is located between the light-emitting functional layer and the substrate, the pixel limiting layer comprises a plurality of pixel openings and pixel limiting parts located between the adjacent pixel openings, the pixel openings expose at least part of the first electrode, and the light-emitting functional layer makes contact with the first electrode through the pixel openings; a slope angle of 25-35 degrees is formed between at least part of the surface, located on the first electrode and far away from the substrate, of the pixel limiting part and the first electrode, so that scratch of a mask to a light-emitting material in the pixel opening can be reduced, and the product reject ratio caused by the scratch problem is reduced.

Description

Technical Field

[0001] The present disclosure relates to a display substrate, a display panel and a display device. Background Art

[0002] Organic light-emitting diode (OLED) display devices are popular among users due to their rich colors, fast response time, foldability, etc. An organic light-emitting display device with a tandem structure increases the 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 to the organic light-emitting device, thereby meeting the user's demand for power consumption and service life of the display device, and is expected to lead the trend of next-generation OLED technology and product development. Summary of the invention

[0003] Embodiments of the present disclosure provide a display substrate, a display panel, and a display device.

[0004] At least one embodiment of the present disclosure provides a display substrate, including a base substrate, a plurality of sub-pixels and a pixel defining layer, wherein the plurality of sub-pixels are located on the base substrate, the sub-pixels include 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 base substrate, the first electrode is located between at least a portion of the light-emitting functional layer and the base substrate, the pixel defining layer is located between the light-emitting functional layer and the base substrate, the pixel defining layer includes a plurality of pixel openings and a pixel defining portion located between adjacent pixel openings, the pixel openings expose at least a portion of the first electrode, the light-emitting functional layer is arranged in contact with the first electrode through the pixel openings, and a slope angle is formed between at least a portion of the surface of the pixel defining portion located on a side of the first electrode away from the base substrate and the first electrode, and the slope angle is 25 to 35 degrees.

[0005] For example, in the display substrate provided according to at least one embodiment of the present disclosure, in a direction perpendicular to the base substrate, the maximum distance between the surface of the pixel defining portion away from the base substrate and the base substrate is greater than the maximum distance between the surface of the light-emitting functional layer in the pixel opening away from the base substrate and the base substrate.

[0006] For example, according to a 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 base substrate, the pixel driving circuit is electrically connected to the first electrode to drive the light-emitting functional layer to emit light, and the display substrate also 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, and in a direction perpendicular to the base substrate, the first electrode of the sub-pixel and the pixel driving circuit of the sub-pixel both overlap with the metal structure.

[0007] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the multiple sub-pixels include sub-pixels of at least two different colors, and the orthographic projection of the metal structure overlapping with the first electrode of the sub-pixel of each color on the base substrate completely falls within the orthographic projection of the pixel opening corresponding to the corresponding sub-pixel on the base substrate.

[0008] For example, in a display substrate provided according to at least one embodiment of the present disclosure, there is a first distance between the orthographic projection of the metal structure overlapping the first electrode of at least one color sub-pixel on the base substrate and the orthographic projection of the pixel defining portion surrounding the pixel opening corresponding to the sub-pixel on the base substrate, and the first distance is not less than 4 microns.

[0009] For example, according to the display substrate provided by at least one embodiment of the present disclosure, the multiple sub-pixels include sub-pixels of at least two different colors, and the metal structure overlapping with the first electrode of the sub-pixel of at least one color includes a portion located outside the pixel opening corresponding to the corresponding sub-pixel.

[0010] For example, in the display substrate provided according to at least one embodiment of the present disclosure, the sub-pixel of the at least one color is a sub-pixel of one color, and the one color is green.

[0011] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the at least one layer of 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 a portion of the pixel driving circuit of the sub-pixel, and in a direction perpendicular to the base substrate, the metal structure of the first metal pattern at least partially overlaps with the metal structure of the second metal pattern.

[0012] For example, according to the display substrate provided by at least one embodiment of the present disclosure, the pixel opening corresponding to the sub-pixel has a first orthographic projection on the base substrate, and each of the metal structures of at least a portion of at least one of the first metal pattern and the second metal pattern has a second orthographic projection on the base substrate, the second orthographic projection falls into the first orthographic projection, and the area of ​​the second orthographic projection is smaller than the area of ​​the first orthographic projection.

[0013] For example, according to the display substrate provided by at least one embodiment of the present disclosure, the pixel opening corresponding to the sub-pixel has a first orthographic projection on the base substrate, the orthographic projection of the metal structure in the first metal pattern on the base substrate falls within the first orthographic projection, and the orthographic projection of the metal structure in the second metal pattern on the base substrate includes a portion located outside the first orthographic projection.

[0014] For example, according to a display substrate provided by at least one embodiment of the present disclosure, the sub-pixel includes a pixel driving circuit, which is located between the first electrode and the base substrate, and the pixel driving circuit is electrically connected to the first electrode to drive the light-emitting functional layer to emit light. The display substrate also includes a metal pattern, which is located between the first electrode and at least a portion of the pixel driving circuit. At least one layer of the metal pattern includes a first metal portion and a second metal portion corresponding to each of the sub-pixels. In a direction perpendicular to the base substrate, the first metal portion corresponding to the sub-pixel overlaps with the first electrode of the sub-pixel, and the second metal portion corresponding to the sub-pixel overlaps with the pixel defining portion surrounding the pixel opening corresponding to the sub-pixel. There is a gap between the first metal portion and the second metal portion corresponding to the sub-pixel, and in a direction perpendicular to the base substrate, an edge of the pixel defining portion close to the first metal portion surrounding the pixel opening of the sub-pixel does not overlap with the metal pattern.

[0015] For example, a display substrate provided according to at least one embodiment of the present disclosure further includes an inorganic layer and an organic layer, the inorganic layer is located between the first electrode of the sub-pixel and the base substrate, the inorganic layer includes a plurality of inorganic structures, at least part of the inorganic structure is located in the pixel opening corresponding to the sub-pixel; the organic layer is located on a side of the inorganic layer close to the base substrate and in contact with the inorganic layer, the organic layer includes a plurality of organic structures, the inorganic structure includes a protrusion protruding relative to the edge of the organic structure, wherein the light-emitting functional layer includes a plurality of film layers, and at least some of the sub-pixels have a defined opening between adjacent sub-pixels, and the portion of the protrusion of the inorganic structure exposed by the defined opening serves as a partition portion, and the partition portion is configured to partition at least one layer of the light-emitting functional layer.

[0016] For example, according to the display substrate provided by at least one embodiment of the present disclosure, the multiple sub-pixels include sub-pixels of at least two different colors, and the protrusion of the inorganic structure corresponding to each of the sub-pixels of at least one color is covered by the pixel defining portion.

[0017] For example, according to the display substrate provided by at least one embodiment of the present disclosure, there is a second distance between the edge of the protruding portion covered by the pixel defining portion and the pixel opening corresponding to the corresponding sub-pixel, and the second distance is not less than 1 / 2 of the dimension of the pixel defining portion in the direction where the second distance is located.

[0018] For example, according to the display substrate provided by at least one embodiment of the present disclosure, the second distance is 1 to 3 micrometers.

[0019] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the at least two sub-pixels of different colors include a first sub-pixel and a second sub-pixel, the area of ​​the light-emitting region of the first sub-pixel is smaller than the area of ​​the light-emitting region of the second sub-pixel, and the protruding portion of the inorganic structure corresponding to the first sub-pixel is covered by the pixel defining portion.

[0020] For example, according to a display substrate provided by at least one embodiment of the present disclosure, each of the sub-pixels includes a pixel driving circuit, wherein the pixel driving circuit is located between the first electrode and the base substrate, and the pixel driving circuit is electrically connected to the first electrode to drive the light-emitting functional layer to emit light. The display substrate also includes at least one layer of metal pattern, wherein the at least one layer of metal pattern is located between the first electrode and at least part of the pixel driving circuit, and each layer of the metal pattern includes a plurality of metal structures, and in a direction perpendicular to the base 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 portion of the inorganic structure overlapping with the first electrode of each of the sub-pixels of a color is covered by the pixel defining portion, and the metal structure overlapping with the first electrode of the sub-pixel of the color includes a portion located outside the pixel opening corresponding to the corresponding sub-pixel.

[0021] For example, a display substrate provided according to at least one embodiment of the present disclosure further comprises an inorganic layer and an inorganic layer, the inorganic layer being located on the base substrate, the inorganic layer comprising a plurality of first partition structures; the organic layer being located on a side of the inorganic layer close to the base substrate and in contact with the inorganic layer, the organic layer comprising 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 comprising a protruding portion protruding relative to an edge of the second partition structure, the first partition structure and the second partition structure are both spaced apart from the pixel defining portion, the light-emitting functional layer comprising a plurality of film layers, the pixel defining layer comprising a plurality of defining openings, each of the defining openings being located between adjacent sub-pixels, the protruding portion of the first partition structure being exposed by the defining opening to isolate at least one layer of the light-emitting functional layer.

[0022] For example, according to the display substrate provided by at least one embodiment of the present disclosure, the pixel defining material is exposed through a mask to form the pixel defining layer, the mask includes a plurality of mask openings, and after the pixel defining material is exposed, the orthographic projection of the mask opening on the base substrate and the orthographic projection of the pixel opening in the pixel defining layer on the base substrate have a third distance between them, and the third distance is not greater than 2 microns.

[0023] For example, according to the display substrate provided by at least one embodiment of the present disclosure, the third distance is 1 micrometer to 1.5 micrometers.

[0024] For example, according to at least one embodiment of the present disclosure, a display substrate is provided, which further includes a plurality of supporting structures located on the base substrate, and the supporting structures are located on one side of the pixel opening corresponding to the sub-pixel, wherein at least a portion of the surface of the supporting structure away from the base substrate is further away from the base substrate than the pixel defining portion, and in a direction perpendicular to the base substrate, a difference between a maximum dimension of the supporting structure and a maximum dimension of the pixel defining portion is at least 0.5 microns.

[0025] Another embodiment of the present disclosure provides a display panel, comprising any of the above-mentioned display substrates.

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

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, but are not intended to limit the present disclosure.

[0028] Figure 1 It is a partial cross-sectional schematic diagram of a display substrate.

[0029] Figure 2 A schematic diagram of a partial planar structure of a display substrate provided in at least one embodiment of the present disclosure.

[0030] Figure 3 For along Figure 2 The schematic diagram of the local cross-section structure taken along the AA' line is shown.

[0031] Figure 4 A partial cross-sectional schematic diagram of another display substrate provided for at least one embodiment of the present disclosure.

[0032] Figures 5 to 8 A partial cross-sectional schematic diagram of different display substrates provided for at least one embodiment of the present disclosure.

[0033] Fig. 9 A schematic diagram of a partial planar structure of another display substrate provided for at least one embodiment of the present disclosure.

[0034] Fig.10 For along Fig. 9 The schematic diagram of the local cross-section structure taken along the BB' line is shown.

[0035] Fig.11 A schematic diagram of a partial planar structure of another display substrate provided for at least one embodiment of the present disclosure.

[0036] Fig.12 for Fig.11 The diagram shown is a schematic diagram of setting a mask during the manufacturing process of a display substrate.

[0037] Fig.13 The present invention is a schematic diagram of the manufacturing process of a pixel defining layer in a display substrate.

[0038] Fig.14 A diagram of the light path when the pixel-defining material is exposed through a mask.

[0039] Fig.15 It is a plan view schematic diagram of a pixel defining layer obtained after the pixel defining material is subjected to exposure treatment.

[0040] Fig.16 A schematic diagram of a manufacturing process of a pixel defining layer in a display substrate provided for at least one embodiment of the present disclosure.

[0041] Fig.17 The light path diagram is a light path diagram when the pixel defining material in at least one embodiment of the present disclosure is exposed through a mask.

[0042] Fig.18 A schematic block diagram of a display device provided for at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0044] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The features such as "parallel", "vertical" and "same" used in the embodiments of the present disclosure include the features such as "parallel", "vertical", "same" in the strict sense, and "approximately parallel", "approximately vertical", "approximately the same" and other situations containing certain errors, taking into account the measurement and the errors related to the measurement of a specific amount (for example, the limitations of the measurement system), indicating the acceptable deviation range for a specific value determined by ordinary technicians in the field. For example, "approximately" can be expressed within one or more standard deviations, or within 10% or 5% of the value. When the number of a component is not particularly indicated in the following 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" refers to one or more, and "multiple" refers to at least two.

[0045] At present, Tandem technology mainly stacks and connects the light-emitting layers of two sub-pixels in series, and sets a whole charge generation layer between the stacked light-emitting layers, such as a P-type doped charge generation layer P-CGL and an N-type doped charge generation layer N-CGL. 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 the display substrate without the Tandem device, the two light-emitting layers in the Tandem device are connected in series, so that dual light-emitting devices can be connected in series. Under the same light-emitting intensity, the light-emitting current of the light-emitting device can be reduced, the life of the organic light-emitting element is increased, and the power consumption is reduced.

[0046] Figure 1 It is a partial cross-sectional schematic diagram of a display substrate.

[0047] During the research, the inventors of this application found that the charge generation layer in the Tandem device has a high conductivity, and the charge generation layer of two adjacent sub-pixels is a continuous film layer. There is a phenomenon of lateral charge migration, which easily causes crosstalk between adjacent sub-pixels and causes color deviation of the display substrate. In response to this, some products use isolation columns to separate the light-emitting functional layer between adjacent sub-pixels to reduce the risk of crosstalk. For example, refer to Figure 1The mask 11 for making the light-emitting functional layer 130 (such as the first light-emitting layer 131, the charge generation layer 133 and the second light-emitting layer 132) of the Tandem device may scratch the light-emitting material of the light-emitting functional layer 130 in the light-emitting area of ​​the sub-pixel (see the scratch area A1), so that the double-layer OLED device may be scratched into a single-layer OLED device. Scratched bright spots are generated in the low grayscale and low brightness display mode, and scratched dark spots are generated in the high grayscale and high brightness display mode, thereby reducing the yield of the product and seriously increasing the production cost of the Tandem device.

[0048] In this regard, through the verification and analysis of scratch-type bright spots (for example, bright spots caused by the above-mentioned scratch phenomenon), it is known that the main reason why the manufacturing mask of the light-emitting functional layer scratches the light-emitting material in the light-emitting area of ​​the sub-pixel is that the slope angle of the side wall of the pixel defining portion surrounding the light-emitting area of ​​the sub-pixel is insufficient (for example, less than 25 degrees), thereby insufficiently supporting the above-mentioned manufacturing mask. In addition, when a support structure for supporting the mask is provided in the display substrate, insufficient density and height of the support structure will also aggravate the above-mentioned scratch problem.

[0049] At least one embodiment of the present disclosure provides a display substrate, including a base substrate, a plurality of sub-pixels and a pixel defining layer, wherein the plurality of sub-pixels are located on the base substrate, the sub-pixels include 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 base substrate, the first electrode is located between at least a portion of the light-emitting functional layer and the base substrate, the pixel defining layer is located between the light-emitting functional layer and the base substrate, the pixel defining layer includes a plurality of pixel openings and a pixel defining portion located between adjacent pixel openings, the pixel openings expose at least a portion of the first electrode, the light-emitting functional layer is arranged in contact with the first electrode through the pixel openings, and a slope angle is formed between at least a portion of the surface of the pixel defining portion located on a side of the first electrode away from the base substrate and the first electrode, and the slope angle is 25 to 35 degrees.

[0050] In the display substrate provided by at least one embodiment of the present disclosure, since the slope angle between at least a portion of the surface of the pixel defining portion located on the side of the first electrode away from the base substrate and the first electrode is not less than 25 degrees and is 25 to 35 degrees, the pixel defining portion can effectively support the manufacturing mask of the light-emitting functional layer, thereby reducing the risk of the above-mentioned manufacturing mask contacting and scratching the light-emitting material located in the pixel opening, thereby significantly reducing the product defective rate caused by the scratch problem.

[0051] At least one embodiment of the present disclosure provides a display panel, which includes the display substrate provided by any embodiment of the present disclosure.

[0052] Another embodiment of the present disclosure further provides a display device, which includes the display substrate provided by any embodiment of the present disclosure.

[0053] The display substrate, display panel and display device provided by the embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0054] Figure 2 A schematic diagram of a partial planar structure of a display substrate provided in at least one embodiment of the present disclosure; Figure 3 For along Figure 2 The schematic diagram of the local cross-section structure taken along the AA' line is shown.

[0055] like Figure 2 and Figure 3 As shown, the display substrate includes a base substrate BS, a plurality of sub-pixels 10 and a pixel defining layer 200. The plurality of sub-pixels 10 are located on the base substrate BS, and the sub-pixels 10 include a light emitting functional layer 130 and a direction perpendicular to the base substrate BS (ie, as shown in FIG. 2 ). Figure 3 The first electrode 110 and the second electrode 120 are located on both sides of the light emitting functional layer 130 (Z direction shown), and the first electrode 110 is located between at least a portion of the light emitting functional layer 130 and the substrate BS.

[0056] For example, Figure 3 As shown, the light-emitting functional layer 130 includes a plurality of film layers. For example, the light-emitting functional layer 130 may include a light-emitting layer for emitting light and a charge generating layer 133. The charge generating layer 133 has strong conductivity, which can make the light-emitting functional layer 130 have the advantages of long life, low power consumption and high brightness. For example, the light-emitting functional layer 130 may be a film layer in an organic light-emitting element. For example, the light-emitting functional layer 130 may include a first light-emitting layer (EML) 131, a charge generating layer (CGL) 133 and a second light-emitting layer (EML) 132 arranged in a stacked manner, and the charge generating layer 133 is located between the first light-emitting layer 131 and the second light-emitting layer 132. It should be noted that Figure 3 The light-emitting functional layer 130 shown may also include other film layers, such as a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL), etc., which are not limited in the 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 all common film layers of multiple sub-pixels 10, which can be called common layers. In addition, Figure 3 The thickness of each film layer shown is only for illustrating each film layer clearly and does not represent the actual size.

[0057] For example, Figure 3As shown, the sub-pixel 10 may include a tandem light emitting element, such as a Tandem OLED, but the embodiments of the present disclosure are not limited thereto.

[0058] For example, Figure 3 As shown, other structures 01 are also provided on the side of the first electrode 110 facing the substrate BS, such as a pixel driving circuit 240 electrically connected to the first electrode 110 of the sub-pixel 10, a signal line and various insulating layers, etc., for example, it may include a passivation layer, a buffer layer, a gate insulating layer, an interlayer insulating layer, etc., and the embodiments of the present disclosure are not limited to this.

[0059] like Figure 2 and Figure 3 As shown, at least part of the pixel defining layer 200 is located between the light emitting functional layer 130 and the base 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 the 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 effective light emitting area 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 portion of the first electrode 110 exposed by the pixel opening 210 on the base substrate BS.

[0060] like Figure 3 As shown, at least a portion of the surface of the pixel defining portion 230 located on the side away from the substrate BS of the first electrode 110 has a slope angle μ with the first electrode 110, and the slope angle μ is 25 to 35 degrees. For example, the slope angle μ can be the angle between the side away from the pixel opening 210 of the portion of the side surface 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 BS. For example, the slope angle μ can be the 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 BS, so as to facilitate the pixel defining portion to effectively support the mask for manufacturing the light-emitting element. For example, the slope angle μ can be 25 to 35 degrees, such as at least one of 26 to 30 degrees, 28 to 32 degrees, and 30 to 35 degrees, or can also be other angles within the range of 25 to 35 degrees, and the embodiments of the present disclosure are not limited to this.

[0061] In the display substrate provided by at least one embodiment of the present disclosure, since the slope angle between at least a portion of the surface of the pixel defining portion located on the side of the first electrode away from the base substrate and the first electrode is not less than 25 degrees and is 25 to 35 degrees, the pixel defining portion can effectively support the manufacturing mask of the light-emitting functional layer, thereby reducing the risk of the above-mentioned manufacturing mask contacting and scratching the light-emitting material located in the light-emitting area of ​​the sub-pixel, and significantly reducing the product defective rate caused by the scratch problem (for example, the product defective rate can be reduced from 80% to below 5%).

[0062] For example, Figure 3 As shown, in the Z direction, the maximum distance between the surface of the pixel defining portion 230 away from the substrate substrate BS and the substrate substrate 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 substrate BS and the substrate substrate BS. For example, at least part of the surface of the pixel defining portion 230 away from the substrate substrate BS is further away from the substrate substrate BS than the light emitting functional layer 130. For example, the surface of the pixel defining portion 230 away from the substrate substrate BS includes a portion located on the side of the light emitting functional layer 130 away from the substrate substrate BS (i.e., a portion that exceeds 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 to 2 / 3 of the maximum size of the pixel defining portion 230, such as 1 / 2, etc., and the embodiments of the present disclosure are not limited to this.

[0063] Such a configuration is advantageous in that at least part of the pixel defining portion protrudes relative to the light-emitting functional layer, thereby enabling the sub-pixel to have a good light emission angle and enabling the pixel defining portion to have a good supporting capability for manufacturing a mask for the light-emitting functional layer.

[0064] For example, Figure 3 As shown, 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 base substrate BS, and the inorganic layer 410 includes a plurality of inorganic structures 405, and at least part of the inorganic structure 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 base substrate BS falls into the orthographic projection of the inorganic structure 405 on the base 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 an integrated structure or a split structure, and the embodiments of the present disclosure are not limited to this.

[0065] For example, Figure 3As shown, the display substrate further includes an organic layer 420. The organic layer 420 is located on a side of the inorganic layer 410 close to the base 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 protrusion 4051 protruding relative to the edge of the organic structure 415. For example, the organic layer 420 also includes a flat portion 425 located between the organic structure 415 and the base 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 an integrated structure. For example, the plurality of organic structures 415 in the organic layer 420 are formed during the manufacturing process of the inorganic structure 405. For example, in the process of forming the inorganic structure 405 by patterning the etching solution, a portion of the organic layer 420 overlapping with the inorganic layer 410 is etched together, and while forming the inorganic structure 405, the inorganic structure 405 is provided with a protrusion 4051 protruding relative to the edge of the organic structure 415.

[0066] For example, Figure 3 As shown, the pixel defining portion 230 also includes a plurality of defining openings. There is a defining opening 220 between adjacent sub-pixels 10 in at least some of the sub-pixels 10, and the portion of the protrusion 4051 of the inorganic structure 405 exposed by the defining opening 220 serves as a partitioning portion 4050. The light-emitting functional layer 130 includes a plurality of film layers, and the partitioning portion 4050 is configured to partition at least one layer of the light-emitting functional layer 130. For example, at least a portion of the protrusion 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 partitioning portion 4050. For example, the orthographic projection of the defining opening 220 on the substrate BS is roughly annular or strip-shaped, and surrounds the light-emitting area of ​​the sub-pixel 10.

[0067] By setting the above-mentioned partition part, at least one layer of the light-emitting functional layer between adjacent sub-pixels can be isolated, which can reduce the risk of crosstalk between adjacent sub-pixels. At the same time, since the slope angle μ between at least a portion of the surface of the pixel defining part surrounding the light-emitting area of ​​the sub-pixel located on the side of the first electrode away from the substrate and the first electrode is 25 to 35 degrees, the pixel defining part can effectively support the manufacturing mask of the light-emitting functional layer, so as to reduce the risk of the above-mentioned manufacturing mask contacting and scratching the light-emitting material located in the light-emitting area of ​​the sub-pixel.

[0068] For example, Figure 2 and Figure 3 As shown, the display substrate includes at least two sub-pixels 10 of different colors, and the protrusion 4051 of the inorganic structure 405 corresponding to each sub-pixel 10 of at least one color is covered by the pixel defining portion 230. Figure 2As shown, the inorganic structure 405 corresponding to the first sub-pixel 101 is not exposed by the defined 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 between the light-emitting area of ​​the sub-pixel 10 and the adjacent defined opening 220 (i.e., the defined opening 220 that exposes the protruding portion 4051 of the inorganic structure 405 corresponding to the adjacent sub-pixel 10) can be reduced (see Figure 2 The distance T shown is relatively far, which is beneficial for the pixel defining portion 230 surrounding the light-emitting area of ​​the sub-pixel 10 to have a larger setting space, so that the pixel defining portion 230 has a good morphology, for example, it can have a sufficient material thickness, etc., to form a slope angle that meets the requirements (for example, 25 to 35 degrees).

[0069] For example, Figure 2 As shown, a plurality of sub-pixels 10 are arranged into a plurality of first sub-pixel groups 0010 and a plurality of second sub-pixel groups 0020 alternately arranged along a first arrangement direction X, the first sub-pixel group 0010 includes second sub-pixels 102 and third sub-pixels 103 alternately arranged along a second arrangement direction Y, and the second sub-pixel group 0020 includes first sub-pixels 101 arranged along the second arrangement direction Y. For example, the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103 have different luminous colors. The first arrangement direction X intersects with the second arrangement direction Y, and both are parallel to the substrate BS.

[0070] For example, Figure 2 As shown, 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 third sub-pixels 103 in at least part of the third sub-pixels 103 is surrounded by eight sub-pixels 10, and the eight sub-pixels 10 include alternately arranged first sub-pixels 101 and second sub-pixels 102. 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.

[0071] For example, Figure 2 and Figure 3 As shown, the protrusion 4051 of the inorganic structure 405 corresponding to the first sub-pixel 101 is covered by the pixel defining portion 230. For example, at least a portion of the protrusion 4051 of the inorganic structure 405 corresponding to the second sub-pixel 102 is exposed by the defining opening 220, and at least a portion of the protrusion 4051 of the inorganic structure 405 corresponding to the third sub-pixel 103 is exposed by the defining opening 220.

[0072] By ensuring that the protruding portion of the inorganic structure corresponding to the first sub-pixel with a smaller light-emitting area is not exposed by the limited opening, it is beneficial to make the pixel defining portion of the light-emitting area surrounding the first sub-pixel have a sufficiently large width, thereby helping to make the pixel defining portion have a sufficiently large thickness to form a required slope angle (for example, 25 to 35 degrees), thereby helping to enhance the anti-scratch ability of the mask for manufacturing the light-emitting element.

[0073] For example, the width of the pixel defining portion refers to the size of a cross section of the pixel defining portion cut by a plane perpendicular to its extension direction in the arrangement direction of adjacent sub-pixels. For example, the extension direction of the pixel defining portion can be a straight line direction or a fold line direction, which is not limited in the embodiments of the present disclosure.

[0074] Figure 4 A partial cross-sectional schematic diagram of another display substrate provided for at least one embodiment of the present disclosure. For example, the display substrate and Figure 3 The difference between the display substrate shown is that it further has at least one layer of metal pattern 300 , and the rest of the structures are the same. For details, please refer to the relevant description in the above embodiments, which will not be repeated here.

[0075] For example, Figure 4 As shown, the sub-pixel 10 includes a pixel driving circuit 240, the pixel driving circuit 240 is located between the first electrode 110 and the substrate BS, and the pixel driving circuit 240 is connected to the first electrode 110 to drive the light-emitting functional layer 130 to emit light. For example, the pixel driving circuit 240 may include a plurality of transistors and at least one capacitor (not shown in the figure), and the first electrode 110 may be electrically connected to the pixel driving circuit 240 through a connecting via (not shown in the figure).

[0076] For example, Figure 4 As shown, the display substrate further includes at least one layer of metal pattern 300 , each layer of metal pattern 300 is located between the first electrode 110 and at least a portion of the pixel driving circuit 240 , and each layer of metal pattern 300 includes a plurality of metal structures 350 . Figure 4The display substrate includes a layer of metal pattern 300 as an example for illustration, but is not limited thereto. The embodiments of the present disclosure do not limit the number of layers of the metal pattern 300. 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 overlap 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, a plurality of metal structures 350 are arranged in a one-to-one correspondence with a plurality of sub-pixels 10. For example, the metal pattern 300 may be located in the same film layer as a part of the structure of the pixel driving circuit 240. For example, the metal structure 350 is configured to transmit a DC signal. For example, since the first electrode 110 and the light-emitting element 130 of the sub-pixel 10 are sensitive to signal fluctuations in the pixel driving circuit 240, for example, when the metal structure 350 overlaps 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 of the above structures in the pixel driving circuit 240 (for example, signal fluctuations of key nodes or AC signals in the pixel driving circuit) to reduce the risk of poor display and the like in the sub-pixel 10.

[0077] For example, Figure 4 As shown, the plurality of sub-pixels 10 in the display substrate include at least two sub-pixels 10 of different colors, for example, a plurality of first sub-pixels 101 and a plurality of second sub-pixels 102. For example, the luminous 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 to this. For example, the luminous colors of the first sub-pixel 101 and the second sub-pixel 102 can be interchanged. For example, the orthographic projections of the metal structure 350 overlapping with the first electrode 110 of the sub-pixel 10 of each color on the substrate substrate BS all completely fall into the orthographic projections of the pixel opening 210 corresponding to the corresponding sub-pixel 10 on the substrate substrate BS. In other words, the orthographic projections of the metal structure 350 overlapping with the first electrode 110 of each sub-pixel 10 of different colors on the substrate substrate BS all completely fall into the orthographic projections 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 by the first electrode 110 of any one of the first sub-pixel 101 and the second sub-pixel 102 on the substrate BS completely falls within the orthographic projection of the pixel opening 210 corresponding to the sub-pixel 10 on the substrate BS.

[0078] Such a setting can make the metal structure corresponding to the sub-pixels of different colors have a more uniform effect on the light emitting angle of the sub-pixels. For example, the pixel defining portions surrounding the pixel openings of the sub-pixels of different colors can have basically the same slope angle, thereby reducing the difference in light emitting effects between the sub-pixels of different colors.

[0079] For example, Figure 4 As shown, there is a first distance L1 between the orthographic projection of the metal structure 350 overlapping the first electrode 110 of at least one color sub-pixel 10 on the substrate substrate BS and the orthographic projection of the pixel defining portion 230 of the light-emitting area surrounding the sub-pixel 10 on the substrate substrate BS, and the first distance L1 is not less than 4 microns.

[0080] For example, Figure 4 As shown, the orthographic projection area of ​​the metal structure 350 overlapping with the first electrode 110 of the second sub-pixel 102 on the base substrate BS is smaller than the orthographic projection area of ​​the pixel opening 210 corresponding to the second sub-pixel 102 on the base 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 may be 4.2 microns, 4.5 microns, 4.8 microns or 5 microns, which is not limited in the embodiments of the present disclosure.

[0081] Such a setting is conducive to reducing the influence of the setting of the metal structure on the morphology of the pixel defining portion surrounding the light-emitting area of ​​the sub-pixel. For example, the setting of the metal structure can have basically no effect on the slope angle of the pixel defining portion, thereby helping to reduce the requirements for the manufacturing process and facilitating the control of the slope angle of the pixel defining portion within the range of 25 degrees to 35 degrees.

[0082] Figure 4 The second sub-pixel 102 is used as an example for description, but the embodiments of the present disclosure are not limited thereto. For example, the orthographic projection of the metal structure 350 overlapped by the first electrode 110 of the first sub-pixel 101 on the base 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 base substrate BS.

[0083] Such a configuration is beneficial for making the pixel defining portions of the light-emitting areas surrounding the sub-pixels of different colors have a uniform slope angle, and can effectively reduce the difficulty of manufacturing, making the slope angle of the pixel defining portions of the pixel openings corresponding to the sub-pixels of different colors easy to control.

[0084] Figure 5 A partial cross-sectional schematic diagram of another display substrate provided for at least one embodiment of the present disclosure. For example, Figure 5 The display substrate shown is Figure 4 The difference between the display substrates shown is that the metal patterns are different, and the rest of the structures are the same. For details, please refer to the relevant description in the above embodiments, which will not be repeated here.

[0085] For example, Figure 5As shown, the plurality of sub-pixels 10 include at least two sub-pixels 10 of different colors, and the metal structure 350 overlapping the first electrode 110 of at least one 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 orthographic projection area of ​​the metal structure 350 overlapped by the first electrode 110 of the first sub-pixel 101 on the substrate BS is larger than the orthographic projection area of ​​the pixel opening 210 corresponding to the first sub-pixel 101 on the substrate BS.

[0086] By making the orthographic projection area of ​​the metal structure overlapped by the first electrode of at least one color sub-pixel larger on the substrate and larger than the orthographic projection area of ​​the pixel opening corresponding to the sub-pixel on the substrate, the shielding effect of signal fluctuations in the pixel driving circuit of the sub-pixel can be enhanced, so as to reduce the adverse effects of signal fluctuations in the pixel driving circuit on the light-emitting element and the first electrode of the sub-pixel, thereby helping the sub-pixel to have a good light-emitting effect and, at the same time, helping to simplify the manufacturing process of the metal structure.

[0087] For example, Figure 5 As shown, the protruding portion 4051 of the inorganic structure 405 overlapping with the first electrode 110 of each sub-pixel 10 of a color is covered by the pixel defining portion 230, and the metal structure 350 overlapping with 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 sub-pixel 10 of the above-mentioned one color is the first sub-pixel 101, but is not limited thereto. For example, the metal structure 350 overlapping with the first electrode 110 of the sub-pixel 10 of the above-mentioned one color is not limited to a one-layer metal structure, and can be, for example, a multi-layer metal structure, such as a two-layer metal structure, which is not limited in the embodiments of the present disclosure.

[0088] For example, Figure 5 As shown, the orthographic projection area of ​​the metal structure 350 overlapping with the first electrode 110 of the first sub-pixel 101 on the substrate BS is larger than the orthographic projection area of ​​the first electrode 110 on the substrate BS. Figure 5 In the direction R1 shown, 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 defining opening 220, which is conducive to making the pixel defining portion 230 surrounding the pixel opening 210 corresponding to the first sub-pixel 101 have a good morphology, for example, it can have a slope angle of 25 to 35 degrees.

[0089] For example, Figure 5 As shown, the metal structure 350 overlapping the first electrode 110 of a sub-pixel 10 of a color includes a portion located outside the pixel opening 210 corresponding to the corresponding sub-pixel 10, and the light-emitting color of the sub-pixel 10 of the color is green. For example, the sub-pixel 10 of the color is the first sub-pixel 101, but it is not limited thereto.

[0090] For example, Figure 2 and Figure 5 As shown, 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 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 are not limited thereto. For example, the orthographic projection of the metal structure 350 overlapped by the first electrode 110 of any one of the second sub-pixel 102 and the third sub-pixel 103 on the substrate BS falls into the orthographic projection of the pixel opening 210 corresponding to the sub-pixel 102 on the substrate BS.

[0091] For example, by making the metal structure overlapped by the first electrode of the first sub-pixel with the smallest area of ​​the light-emitting region include a portion located outside the pixel opening corresponding to the first sub-pixel, it is possible to simplify the manufacturing process of the metal structure and enhance the shielding effect of signal fluctuations in the pixel driving circuit of the first sub-pixel while ensuring that the pixel defining portion surrounding the pixel opening corresponding to the first sub-pixel has a slope angle of 25 to 35 degrees.

[0092] Figure 6 A partial cross-sectional schematic diagram of another display substrate provided for at least one embodiment of the present disclosure. For example, Figure 6 The display substrate shown is Figure 4 The difference between the display substrates shown is that the metal patterns are different, and the rest of the structures are the same. For details, please refer to the relevant description in the above embodiments, which will not be repeated here.

[0093] For example, Figure 6As shown, at least one layer of 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 a portion 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 overlaps at least partially with the metal structure 350 of the second metal pattern 320. For example, the multiple metal structures 350 of the first metal pattern 310 correspond to the multiple sub-pixels 10 one by one, and correspond to the multiple metal structures 350 of the second metal pattern 320 one by one. For example, the metal structure 350 of the first metal pattern 310 overlaps with the metal structure 350 of the second metal pattern 320. 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 the embodiments of the present disclosure are not limited to this. 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 of the corresponding shielded structure in the pixel driving circuit 240 away from the substrate BS. 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 that shields the structure is located on the side of the structure away from the substrate BS.

[0094] With this arrangement, the signal fluctuation in the pixel driving circuit can be shielded simultaneously by the metal structure in the first metal pattern and the metal structure in the second metal pattern, thereby effectively reducing the impact of the signal fluctuation in the pixel driving circuit so that the sub-pixel has a good luminous effect.

[0095] For example, Figure 6As shown, the pixel opening 210 corresponding to the sub-pixel 10 has a first orthographic projection on the substrate BS, and each of the at least partial metal structures 350 of at least one of the first metal pattern 310 and the second metal pattern 320 has a second orthographic projection on the substrate BS, the second orthographic projection falls into the first orthographic projection, and the area of ​​the second orthographic projection is smaller than the area of ​​the first orthographic projection. For example, each of the at least partial metal structures 350 of the first metal pattern 310 or the second metal pattern 320 has the above-mentioned second orthographic projection on the substrate BS. For example, each of the at least partial metal structures 350 of the first metal pattern 310 and the at least partial metal structures 350 of the second metal pattern 320 has the above-mentioned second orthographic projection on the substrate BS. For example, each of the metal structures 350 of the first metal pattern 310 has the above-mentioned second orthographic projection on the substrate BS. For example, the distance between the second orthographic projection and the first orthographic projection is the first distance L1, that is, not less than 4 microns.

[0096] Thus, by making each of the metal structures of the first metal pattern and at least part of the metal structures of the second metal pattern have a second orthographic projection on the substrate, and the second orthographic projection falls into the first orthographic projection of the pixel opening on the substrate, the first metal structure and the second metal structure can be used together to shield the signal fluctuation in the pixel driving circuit, thereby reducing the influence on the light emitting condition of the light emitting element of the sub-pixel, while reducing the influence of the setting of the metal structure on the morphology of the pixel defining portion surrounding the pixel opening, which is beneficial for the pixel defining portion to have a good and uniform slope angle, so as 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.

[0097] For example, Figure 6 As shown, the orthographic projection of the metal structure 350 in the first metal pattern 310 on the substrate BS falls within the first orthographic projection, and the orthographic projection of the metal structure 350 in the second metal pattern 320 on the substrate BS includes a portion outside the first orthographic projection. For example, the orthographic projection area of ​​the metal structure 350 in the first metal pattern 310 on the substrate BS is smaller than the orthographic projection area of ​​the metal structure 350 in the second metal pattern 320 on the substrate BS. For example, the orthographic projection of the metal structure 350 in the first metal pattern 310 on the substrate BS serves as the above-mentioned second orthographic projection.

[0098] 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. Therefore, the signal fluctuation in the pixel driving circuit can be effectively shielded by the metal structure of the second metal pattern having a larger orthographic projection area on the substrate. At the same time, the metal structure in the first metal pattern has the above-mentioned smaller second orthographic projection, which can reduce the impact on the morphology of the pixel defining portion, so that the pixel defining portion can effectively support the manufacturing mask of the light-emitting element to reduce scratches on the light-emitting material located in the pixel opening.

[0099] Figure 7 A partial cross-sectional schematic diagram of another display substrate provided for at least one embodiment of the present disclosure. For example, Figure 7 The display substrate shown is Figure 4 The difference between the display substrates shown is that the metal patterns are different, and the rest of the structures are the same. For details, please refer to the relevant description in the above embodiments, which will not be repeated here.

[0100] For example, Figure 7 As shown, the display substrate includes a metal pattern 300 located between the first electrode 110 and at least a portion of the pixel driving circuit 240. For example, at least one layer of the metal pattern 300 includes a first metal portion 301 and a second metal portion 302 corresponding to each sub-pixel 10, and in the Z direction, the first metal portion 301 corresponding to the sub-pixel 10 overlaps with the first electrode 110 of the sub-pixel 10, and the second metal portion 302 corresponding to the sub-pixel 10 overlaps with the pixel defining portion 230 surrounding the pixel opening 210 corresponding to the sub-pixel 10.

[0101] For example, Figure 7 As shown, the metal pattern 300 includes a plurality of first metal parts 301 and a plurality of second metal parts 302. For example, the plurality of first metal parts 301 correspond to the plurality of sub-pixels 10 one by one. For example, the orthographic projection area of ​​the first metal part 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 part 301 on the substrate BS does not overlap with 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 part 301 on the substrate BS completely falls into the orthographic projection of the light-emitting area of ​​the sub-pixel 10 on the substrate BS.

[0102] For example, Figure 7As shown, the second metal portion 302 surrounds the light-emitting area of ​​the sub-pixel 10. For example, the light-emitting area of ​​a sub-pixel 10 may be surrounded by a plurality of second metal portions 302, or may be surrounded by a ring-shaped second metal portion 302. For example, a second metal portion 302 may be provided between adjacent sub-pixels 10. For example, the orthographic projection of the second metal portion 302 surrounding the light-emitting area of ​​the sub-pixel 10 on the substrate BS may be a non-closed ring. For example, the first metal portion 301 corresponding to the sub-pixel 10 refers to the first metal portion 301 overlapping with the light-emitting area of ​​the sub-pixel 10, and the second metal portion 302 corresponding to the sub-pixel 10 refers to the second metal portion 302 surrounding the light-emitting area of ​​the sub-pixel 10 and overlapping with the pixel defining portion 230 surrounding the light-emitting area of ​​the sub-pixel 10. For example, between adjacent sub-pixels 10 (such as Figure 7 In the arrangement direction of the second sub-pixel 102 and the first sub-pixel 101 shown, that is, direction R1, the cross-section of the pixel defining portion 230 cut by a plane parallel to the arrangement direction of the adjacent sub-pixel 10 and perpendicular to the substrate BS has a first size in direction R1, and the second metal portion 302 has a second size in direction R1, and the second size is smaller than the first size.

[0103] For example, Figure 7 As shown, there is a gap SP between the first metal portion 301 and the second metal portion 302 corresponding to the sub-pixel 10, and the edge of the pixel defining portion 230 close to the first metal portion 301 surrounding the pixel opening 210 corresponding to the sub-pixel 10 does not overlap with the metal pattern 300. Figure 7 Taking the second sub-pixel 102 as an example, the distance between the first metal portion 301 and the second metal portion 302 corresponding to the second sub-pixel 102 (i.e., the size of the interval SP in the direction R1) is L0, the distance between the first metal portion 301 and the pixel opening 210 corresponding to the second sub-pixel 102 is W1, and the distance between the second metal portion 302 and the pixel opening 210 corresponding to the second sub-pixel 102 is W2. For example, W1 may be substantially equal to W2.

[0104] Such a configuration can reduce the supporting effect 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, thereby facilitating increasing the slope angle between at least a portion of the surface of the pixel defining part located on the side of the first electrode away from the substrate and the first electrode, so that the pixel defining part has a stronger supporting ability for the manufacturing mask of the light-emitting element, thereby reducing the scratching of the manufacturing mask on the light-emitting material located in the pixel opening.

[0105] Figure 8 A partial cross-sectional schematic diagram of another display substrate provided for at least one embodiment of the present disclosure. For example, Figure 8 The display substrate shown is Figure 3The difference between the display substrates shown is that the inorganic layers are different, and the rest of the structures are the same. For details, please refer to the relevant description in the above embodiments, which will not be repeated here.

[0106] For example, Figure 2 and Figure 8 As shown, there is a second distance L2 between the edge of the protrusion 4051 covered by the pixel defining portion 230 and the pixel opening 210 corresponding to the corresponding sub-pixel 10, and the second distance L2 is not less than 1 / 2 of the dimension L3 of the pixel defining portion 230 in the direction where the second distance L2 is located. For example, the dimensions of each sub-pixel 10 in the direction where the second distance L2 is located are substantially the same. For example, the inorganic structure 405 corresponding to the sub-pixel 10 refers to the inorganic structure 405 that overlaps with the first electrode 110 of the sub-pixel 10. For example, Figure 8 As shown, the protruding portion 4051 of the inorganic structure 405 corresponding to the first sub-pixel 101 is not exposed by the defining opening 220, but is completely covered by the pixel defining portion 230. Thus, at least a portion of the protruding portion 4051 of the inorganic structure 405 corresponding to the sub-pixel 10 adjacent to the first sub-pixel 101 (e.g., the second sub-pixel 102) is exposed by the defining opening 220 to serve as the partition portion 4050.

[0107] For example, Figure 8 As shown, 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 the second distance L2, and the second distance L2 is greater than or equal to 1 / 2 of the dimension L3 of the pixel defining portion 230 surrounding the light-emitting area of ​​the first sub-pixel 101 in the direction where the second distance L2 is located. For example, the second distance L2 may be 2 / 3 of the above-mentioned dimension L3, but is not limited thereto. For example, the above-mentioned second distance L2 may be 1 to 15 microns, such as at least one of 1 to 3 microns, 3 to 5 microns, 5 to 10 microns, 10 to 12 microns, and 12 to 15 microns, or may be other values ​​in the range of 1 to 15 microns. For example, the second distance L2 does not exceed 1 / 2 of the dimension of the light-emitting area of ​​the sub-pixel in the direction R1, and the embodiments of the present disclosure are not limited thereto.

[0108] Such a configuration is conducive to supporting at least part of the pixel defining portion through the inorganic structure. For example, most of the pixel defining portion surrounding the light-emitting area of ​​the sub-pixel can be located on the side of the inorganic structure away from the base substrate. This is conducive to making the portion of the pixel defining portion located on the inorganic structure have a sufficiently large thickness, which is conducive to making at least part of the surface of the pixel defining portion located on the side of the first electrode away from the base substrate able to form as large a slope angle as possible with the first electrode, so as to improve the anti-scratch ability of the mask for manufacturing the light-emitting element.

[0109] Fig. 9A schematic diagram of a partial planar structure of another display substrate provided for at least one embodiment of the present disclosure; Fig.10 For along Fig. 9 The schematic diagram of the local cross-section structure taken along the BB' line is shown.

[0110] For example, Fig. 9 and Fig.10 As shown, the display substrate includes an inorganic layer 410 and an organic layer 420, the inorganic layer 410 is located on the base substrate BS, and the inorganic layer 410 includes a plurality of first partition structures 413. The organic layer 420 is located on a side of the inorganic layer 410 close to the base 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 protrusion 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.

[0111] For example, Fig. 9 and Fig.10 As shown, 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 protrusions 4051 of the first partition structure 413 are exposed by the defined openings 220 to partition at least one layer of the light-emitting functional layer 130. For example, at least one layer of the light-emitting functional layer 130 of adjacent sub-pixels 10 is partitioned by the protrusions 4051 of the first partition structure 413, thereby reducing the risk of crosstalk between adjacent sub-pixels 10.

[0112] For example, Fig. 9 As shown, the inorganic layer 410 includes a plurality of inorganic structures 405, and 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 BS, and the inorganic structure 405 can make the sub-pixel 10 have good electrode flatness. For example, the organic layer 420 also includes a portion 427 other than the organic structure 415 and the second partition structure 423, and the portion 427 is an integrated 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 also etches the portion of the organic layer 420 in contact with the inorganic layer 410 , thereby forming the organic structure 415 and the second partition structure 423 .

[0113] By arranging the first partition structure and the second partition structure for isolating at least one layer of the light-emitting functional layer between adjacent sub-pixels, it is beneficial to increase the width of the pixel defining portion, and thus to make the pixel defining portion have a good morphology. For example, the pixel defining portion can have a sufficiently large slope angle between at least a portion 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 scratching of the manufacturing mask on the light-emitting material located in the pixel opening.

[0114] about Fig. 9 and Fig.10 For other structures in the display substrate shown, please refer to the relevant description of the above embodiment and will not be described in detail here.

[0115] Fig.11 A schematic diagram of a partial planar structure of another display substrate provided for at least one embodiment of the present disclosure; Fig.12 for Fig.11 The diagram shown is a schematic diagram of setting a mask during the manufacturing process of a display substrate.

[0116] For example, refer to Fig. 9 and Fig.11 , the display substrate may further include a plurality of support structures 700 located on the base 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 a portion of the surface of the support structure 700 away from the base substrate BS is further away from the base substrate BS than the pixel defining portion 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 may be located in the pixel defining layer 200. For example, the support structure 700 may be a 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.

[0117] For example, refer 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 portion 230 is at least 0.5 micrometers, such as 0.8 micrometers or 0.1 micrometers, which is not limited in the embodiments of the present disclosure. Thus, the support structure 700 can effectively support the mask 710 to reduce the scratching of the light emitting material in the pixel opening 210 by the mask 710.

[0118] Fig.13 The present invention is a schematic diagram of the manufacturing process of a pixel defining layer in a display substrate.

[0119] For example, Fig.13As shown, the pixel defining material 0200 is exposed through a mask 610 to form a pixel defining layer. The mask 610 includes a plurality of mask openings 601. After the pixel defining material 0200 is exposed, 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 have a third distance Lm.

[0120] Fig.14 A light path diagram for a pixel-defining material when it is exposed through a mask; Fig.15 It is a plan view schematic diagram of a pixel defining layer obtained after the pixel defining material is subjected to exposure treatment.

[0121] For example, refer to Fig.14 and Fig.15 , the incident point E0 of the incident light E1 on the first electrode 110 corresponds to the edge of the light emitting area of ​​the sub-pixel 10, and the incident light E1 is reflected on the surface of the first electrode 110 after reaching the incident point E0, and then emitted as the outgoing light E2. Similarly, the outgoing light E3 is the outgoing light after another incident light is reflected on the surface of the first electrode 110. For example, the portion of the pixel defining material located on the side of the outgoing light E2 away from the substrate BS, the portion of the outgoing light E3 located on the side of the substrate BS away from the substrate BS, and the portion located in the mask opening 601 are all removed to form the following: Fig.15 The pixel defining layer 200 shown. For example, the maximum angle between the incident light E1 and the outgoing light E2 is β1. For example, at least a portion of the surface of the pixel defining portion 230 located on the side of the first electrode 110 away from the base substrate BS has a first slope angle with the first electrode 110.

[0122] Fig.16 A schematic diagram of a manufacturing process of a pixel defining layer in a display substrate provided for at least one embodiment of the present disclosure.

[0123] For example, Fig.16 As shown, the pixel defining material 0200 is exposed through the mask 620 to form a pixel defining layer. The mask 610 includes a plurality of mask openings 602. After the pixel defining material 0200 is exposed, the orthographic projection of the mask opening 602 on the substrate BS and the orthographic projection of the pixel opening 210 on the substrate BS have a third distance Lm, and the third distance Lm is not greater than 2 microns. For example, the third distance Lm may be 1 micron to 1.5 microns, such as 1.2 microns, 1.3 microns or 1.4 microns, which is not limited in the embodiments of the present disclosure. For example, compared to Fig.13 The mask 610 shown, Fig.16 The mask opening 602 of the mask 620 shown corresponds to a smaller third distance Lm.

[0124] Fig.17 The light path diagram is a light path diagram when the pixel defining material in at least one embodiment of the present disclosure is exposed through a mask.

[0125] For example, refer to Fig.15 and Fig.17 When the portion of the pixel defining material located on the side of the outgoing light E2 away from the substrate BS, the portion of the outgoing light E3 located on the side of the outgoing light E3 away from the substrate BS, and the portion located in the mask opening 601 are all removed, the maximum angle β2 between the incident light E1 and the outgoing light E2 is less than Fig.14 The maximum angle β1 shown can ensure that the pixel defining portion 230 formed finally has a second slope angle between at least a portion of the surface of the first electrode 110 away from the substrate BS and the first electrode 110 , and the second slope angle is greater than the first slope angle.

[0126] Therefore, by reducing the above-mentioned third distance corresponding to the mask opening, it is beneficial to increase the slope angle corresponding to the pixel defining portion finally formed, and then it is beneficial to enhance the supporting ability of the pixel defining portion to the manufacturing mask of the light-emitting functional layer, so as to reduce the scratching of the manufacturing mask on the light-emitting material located in the pixel opening.

[0127] Another embodiment of the present disclosure provides a display panel, which includes any of the above-mentioned display substrates. Therefore, the technical effects of the above-mentioned display substrates can also be reflected on the display panel, which will not be repeated here. For example, the display panel may also include an Enhanced Efficiency Structure (EES) located on the display substrate (for example, located on its encapsulation layer) to enhance the light extraction efficiency. For example, the display panel may also include a color film, for example, the color film may be located on the side of the EES away from the display substrate, but is not limited to this. The color intensity of the light can be enhanced by setting the color film. For example, the display panel may also be provided with other film layers, which are not limited to the embodiments of the present disclosure.

[0128] Fig.18 A schematic block diagram of a display device provided for at least one embodiment of the present disclosure.

[0129] like Fig.18 As shown, another embodiment of the present disclosure provides a display device, which includes any of the above display substrates. Therefore, the technical effects of the above display substrates can also be embodied in the display device, which will not be described in detail here.

[0130] For example, the display device further includes a cover plate located on the light emitting side of the display substrate.

[0131] For example, the display device may be a display device such as an organic light emitting diode display device, as well as any product or component with a display function, such as a television, digital camera, mobile phone, watch, tablet computer, laptop computer, navigator, etc. that includes the display device, but the present embodiment is not limited thereto.

[0132] There are a few points to note:

[0133] (1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can refer to the general design.

[0134] (2) In the absence of conflict, features in the same embodiment or in different embodiments of the present disclosure may be combined with each other.

[0135] The above description is merely an exemplary embodiment of the present disclosure and is not intended to limit the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A display substrate, comprising: substrate substrate; A plurality of sub-pixels are located on the substrate, the sub-pixels include 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, the first electrode is located between at least part of the light-emitting functional layer and the substrate, a pixel defining layer, located between the light-emitting functional layer and the base substrate, the pixel defining layer comprising a plurality of pixel openings and a pixel defining portion located between adjacent pixel openings, the pixel openings exposing at least a portion of the first electrode, the light-emitting functional layer being arranged in contact with the first electrode through the pixel openings, There is a slope angle between at least a portion of the surface of the pixel defining portion located on a side of the first electrode away from the base substrate and the first electrode, and the slope angle is 25 to 35 degrees.

2. The display substrate according to claim 1, wherein: In a direction perpendicular to the substrate, a maximum distance between a surface of the pixel defining portion away from the substrate and the substrate is greater than a maximum distance between a surface of the light-emitting functional layer in the pixel opening away from the substrate and the substrate.

3. The display substrate according to claim 1, wherein: The sub-pixel includes a pixel driving circuit, the pixel driving circuit is located between the first electrode and the base substrate, and the pixel driving circuit is electrically connected to the first electrode to drive the light-emitting functional layer to emit light. The display substrate further comprises at least one layer of metal pattern, wherein the at least one layer of metal pattern is located between the first electrode and at least a portion of the pixel driving circuit, and each layer of the metal pattern comprises a plurality of metal structures. In a direction perpendicular to the base substrate, the first electrode of the sub-pixel and the pixel driving circuit of the sub-pixel overlap with the metal structure.

4. The display substrate according to claim 3, wherein: The multiple sub-pixels include at least two sub-pixels of different colors, and the orthographic projection of the metal structure overlapping the first electrode of each color sub-pixel on the substrate completely falls into the orthographic projection of the pixel opening corresponding to the corresponding sub-pixel on the substrate.

5. The display substrate according to claim 4, wherein: There is a first distance between the orthographic projection of the metal structure overlapping the first electrode of at least one color sub-pixel on the substrate and the orthographic projection of the pixel defining portion surrounding the pixel opening corresponding to the sub-pixel on the substrate, and the first distance is not less than 4 microns.

6. The display substrate according to claim 3, wherein: The plurality of sub-pixels include sub-pixels of at least two different colors, and the metal structure overlapping the first electrode of the sub-pixel of at least one color includes a portion located outside the pixel opening corresponding to the corresponding sub-pixel.

7. The display substrate according to claim 6, wherein: The at least one color sub-pixel is a sub-pixel of one color, and the one color is green.

8. The display substrate according to claim 3, wherein: The at least one layer of metal pattern includes a first metal pattern and a second metal pattern, wherein the second metal pattern is located between the first metal pattern and at least a portion of the pixel driving circuit of the sub-pixel, In a direction perpendicular to the base substrate, the metal structure of the first metal pattern at least partially overlaps with the metal structure of the second metal pattern.

9. The display substrate according to claim 8, wherein: The pixel opening corresponding to the sub-pixel has a first orthographic projection on the substrate, and each of the metal structures of at least a portion 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 according to claim 8, wherein: The pixel opening corresponding to the sub-pixel has a first orthographic projection on the base substrate, The orthographic projection of the metal structure in the first metal pattern on the substrate falls within the first orthographic projection, and the orthographic projection of the metal structure in the second metal pattern on the substrate includes a portion outside the first orthographic projection.

11. The display substrate according to claim 1, wherein: The sub-pixel includes a pixel driving circuit, the pixel driving circuit is located between the first electrode and the base substrate, and the pixel driving circuit is electrically connected to the first electrode to drive the light-emitting functional layer to emit light. The display substrate further includes a metal pattern, the metal pattern being located between the first electrode and at least a portion of the pixel driving circuit, at least one layer of the metal pattern including a first metal portion and a second metal portion corresponding to each of the sub-pixels, in a direction perpendicular to the base substrate, the first metal portion corresponding to the sub-pixel overlaps with the first electrode of the sub-pixel, and the second metal portion corresponding to the sub-pixel overlaps with the pixel defining portion surrounding the pixel opening corresponding to the sub-pixel, There is a gap between the first metal portion and the second metal portion corresponding to the sub-pixel, and in a direction perpendicular to the base substrate, an edge of the pixel defining portion surrounding the pixel opening of the sub-pixel close to the first metal portion does not overlap with the metal pattern.

12. The display substrate according to claim 1 or 2, further comprising: an inorganic layer, located between the first electrode of the sub-pixel and the base substrate, the inorganic layer comprising 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 base substrate and in contact with the inorganic layer, the organic layer comprising a plurality of organic structures, the inorganic structure comprising a protrusion protruding relative to an edge of the organic structure, Among them, the light-emitting functional layer includes multiple film layers, and there is a defined opening between adjacent sub-pixels in at least some sub-pixels. The part of the protrusion of the inorganic structure exposed by the defined opening serves as a partition part, and the partition part is configured to isolate at least one layer of the light-emitting functional layer.

13. The display substrate according to claim 12, wherein: The plurality of sub-pixels include sub-pixels of at least two different colors, and the protruding portion of the inorganic structure corresponding to each of the sub-pixels of at least one color is covered by the pixel defining portion.

14. The display substrate according to claim 13, wherein: There is a second distance between the edge of the protruding portion covered by the pixel defining portion and the pixel opening corresponding to the corresponding sub-pixel, and the second distance is not less than 1 / 2 of the dimension of the pixel defining portion in the direction where the second distance is located.

15. The display substrate according to claim 14, wherein: The second distance is 1 to 15 micrometers.

16. The display substrate according to claim 13, wherein: The at least two sub-pixels of different colors include a first sub-pixel and a second sub-pixel, the light-emitting area of ​​the first sub-pixel is smaller than the light-emitting area of ​​the second sub-pixel, The protruding portion of the inorganic structure corresponding to the first sub-pixel is covered by the pixel defining portion.

17. The display substrate according to 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 base substrate, and the pixel driving circuit is electrically connected to the first electrode to drive the light-emitting functional layer to emit light. The display substrate further comprises at least one layer of metal pattern, the at least one layer of metal pattern being located between the first electrode and at least a portion of the pixel driving circuit, each layer of the metal pattern comprising a plurality of metal structures, and in a direction perpendicular to the base substrate, the first electrode of the sub-pixel and the pixel driving circuit of the sub-pixel overlap with the metal structure, In which, the protruding portion of the inorganic structure overlapping with the first electrode of each sub-pixel of a color is covered by the pixel defining portion, and the metal structure overlapping with the first electrode of the sub-pixel of the color includes a portion located outside the pixel opening corresponding to the corresponding sub-pixel.

18. The display substrate according to claim 1, further comprising: An inorganic layer, located on the base substrate, the inorganic layer comprising a plurality of first partition structures; an organic layer, located on a side of the inorganic layer close to the base substrate and in contact with the inorganic layer, wherein the organic layer includes a plurality of second partition structures, The first partition structure and the second partition structure are both located between adjacent sub-pixels, the first partition structure includes a protruding portion protruding relative to an edge of the second partition structure, and the first partition structure and the second partition structure are both spaced apart from the pixel defining portion. The light-emitting functional layer includes multiple film layers, the pixel defining layer includes multiple defining openings, each of the defining openings is located between adjacent sub-pixels, and the protruding portion of the first partition structure is exposed by the defining opening to isolate at least one layer of the light-emitting functional layer.

19. The display substrate according to claim 1, wherein: The pixel defining material is exposed through a mask to form the pixel defining layer, wherein the mask includes a plurality of mask openings. After the pixel defining material is subjected to the exposure process, a third distance exists between the orthographic projection of the mask opening on the base substrate and the orthographic projection of the pixel opening in the pixel defining layer on the base substrate, and the third distance is no greater than 2 micrometers.

20. The display substrate according to claim 19, wherein: The third distance is 1 micrometer to 1.5 micrometers.

21. The display substrate according to claim 1, further comprising a plurality of supporting structures located on the base substrate, and the supporting structures are located on one side of the pixel opening corresponding to the sub-pixel, in, At least a portion of the surface of the support structure that is away from the substrate is further away from the substrate than a surface of the pixel defining portion that is 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 portion 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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