Display substrate and display device

Abstract

Provided are a display substrate and a display device. The display substrate comprises a base substrate, a plurality of sub-pixels, a pixel defining layer, an inorganic pattern, and an organic layer, wherein the inorganic pattern comprises at least one first inorganic structure, each first inorganic structure comprises a main body portion and a peripheral portion connected to each other, the main body portion overlaps first electrodes of the sub-pixels, and the peripheral portion is located outside the main body portion; the organic layer is located between the inorganic pattern and the base substrate and is in contact with the inorganic pattern; the pixel defining layer comprises a plurality of defining openings; and the peripheral portion of the first inorganic structure comprises protrusions, the protrusions are located between adjacent sub-pixels and exposed by the defining openings, the edges of the protrusions away from the main body portion are spaced apart from the organic layer in a direction perpendicular to the base substrate, at least one layer of a light-emitting functional layer is disconnected by the edges of the protrusions, and the distance between the edge of each protrusion and the base substrate is greater than the distance between the main body portion and the base substrate. Therefore, the amelioration of crosstalk and a motion blur phenomenon of the sub-pixels is facilitated.

Description

Display substrate and display device

[0001] This application claims priority to Chinese Patent Application No. 202510190066.X, filed on February 20, 2025, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0002] Embodiments of this disclosure relate to a display substrate and a display device. Background Technology

[0003] Organic light-emitting diode (OLED) displays offer advantages such as rich colors, fast response times, and foldability. The tandem structure employed in OLED displays improves the lifespan and brightness of the device by adding at least one light-emitting layer and a charge-generating layer, thus extending the standby time and overall lifespan of the display. Summary of the Invention

[0004] At least one embodiment of this disclosure provides a display substrate, comprising: a substrate, a plurality of sub-pixels, a pixel defining layer, an inorganic pattern, and an organic layer. The plurality of sub-pixels are located on the substrate, each sub-pixel including a light-emitting functional layer and a first electrode and a second electrode located on opposite sides of the light-emitting functional layer along a direction perpendicular to the substrate. The first electrode is located between the light-emitting functional layer and the substrate, and the second electrodes of adjacent sub-pixels are continuously disposed. At least a portion of the pixel defining layer is located between the light-emitting functional layer and the first electrode. The pixel defining layer includes a plurality of pixel openings and pixel defining portions located between adjacent pixel openings. The pixel openings expose at least a portion of the first electrode. At least a portion of the inorganic pattern is located between the first electrode of the sub-pixel and the substrate. The inorganic pattern includes at least one first inorganic structure, the first inorganic structure including interconnected main body portions. The main body overlaps with the first electrode of the sub-pixel, and the peripheral portion is located outside the main body. The organic layer is located between the inorganic pattern and the substrate and is in contact with the inorganic pattern. The pixel defining layer further includes a plurality of defining openings. The pixel defining portion surrounds the plurality of pixel openings and the plurality of defining openings. At least some sub-pixels have a defining opening between adjacent sub-pixels. The peripheral portion of the first inorganic structure includes a protrusion. The protrusion is located between adjacent sub-pixels and is exposed by the defining opening. The edge of the protrusion away from the main body is spaced from the organic layer in a direction perpendicular to the substrate. The light-emitting functional layer includes multiple film layers. At least one of the light-emitting functional layers is separated by the edge of the protrusion. The distance between the edge of the protrusion and the substrate is greater than the distance between the main body and the substrate.

[0005] For example, in a display substrate provided according to at least one embodiment of the present disclosure, in the first inorganic structure, the distance between the peripheral portion and the substrate gradually increases from the direction close to the main body portion to the direction away from the main body portion.

[0006] For example, in a display substrate provided according to at least one embodiment of the present disclosure, at least a portion of the peripheral portion of the first inorganic structure near the surface of the substrate is a plane, and the angle between the plane and a plane parallel to the substrate is 10 to 30 degrees.

[0007] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the maximum distance between the protrusion and the organic layer in a direction perpendicular to the substrate is 0.3 to 1.0 micrometers.

[0008] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the organic layer includes a sloping surface, a portion of the peripheral portion of the first inorganic structure is located on the sloping surface, at least a portion of the sloping surface overlaps with the pixel defining portion, and the protrusion of the first inorganic structure is a portion of the peripheral portion that protrudes relative to the sloping surface.

[0009] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the light-emitting functional layer includes a charge-generating layer and a plurality of sub-functional layers located between the charge-generating layer and the second electrode, the charge-generating layer being separated by the edge of the protrusion, and at least one sub-functional layer being continuously disposed at the protrusion.

[0010] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the protrusion of the first inorganic structure includes an end face away from the main body, the end face being inclined toward the direction of the main body.

[0011] For example, in a display substrate provided according to at least one embodiment of the present disclosure, at least a portion of the end face of the protrusion of the first inorganic structure is a plane, and the angle between the plane and the plane parallel to the substrate is 10 to 30 degrees.

[0012] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the portion of the organic layer that contacts the peripheral portion of the first inorganic structure has a first average thickness, and the portion of the organic layer that contacts the main body portion of the first inorganic structure has a second average thickness, wherein the first average thickness is greater than the second average thickness.

[0013] For example, according to at least one embodiment of the display substrate provided in this disclosure, the inorganic pattern further includes at least one second inorganic structure, each second inorganic structure including a portion overlapping the pixel opening and a portion located outside the pixel opening, the portion of the second inorganic structure located outside the pixel opening being covered by the pixel defining portion, the plurality of sub-pixels including adjacent first sub-pixels and second sub-pixels, the first electrode of the first sub-pixel overlapping the main body portion of the first inorganic structure, the first electrode of the second sub-pixel overlapping the second inorganic structure, and the protrusion of the first inorganic structure being exposed by the defining opening between the first sub-pixel and the second sub-pixel.

[0014] For example, according to at least one embodiment of the present disclosure, the display substrate includes a plurality of sub-pixels including adjacent first sub-pixels and second sub-pixels, the first electrode of the first sub-pixel and the first electrode of the second sub-pixel respectively overlap with the main body of a first inorganic structure, and the protrusions of the first inorganic structure overlapped by the first electrode of the first sub-pixel and the first electrode of the second sub-pixel are all exposed by a defined opening located between the first sub-pixel and the second sub-pixel.

[0015] For example, according to at least one embodiment of the present disclosure, the organic layer includes at least one groove, with one groove between at least two adjacent sub-pixels, and the groove is exposed by the defined opening, wherein at least a portion of the orthographic projection of the groove on the substrate does not overlap with the orthographic projection of the inorganic pattern on the substrate.

[0016] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the groove is located on the side of the protrusion of the first inorganic structure away from the main body, and the orthographic projection of the protrusion on the substrate does not overlap with the orthographic projection of the groove on the substrate.

[0017] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the portion of the organic layer located between adjacent sub-pixels includes a plurality of spaced grooves.

[0018] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the minimum distance between the protrusion and the groove of the first inorganic structure in a direction parallel to the substrate is 0.05 to 0.3 micrometers.

[0019] For example, in a display substrate provided according to at least one embodiment of the present disclosure, at least a portion of the side surfaces of the cross section of the groove being cut by a plane have a slope angle, the plane being perpendicular to the substrate and parallel to the arrangement direction of adjacent sub-pixels located on both sides of the groove, the slope angle being 25 to 40 degrees.

[0020] For example, according to at least one embodiment of the present disclosure, the display substrate further includes a support structure located between the organic layer and the substrate and in contact with the organic layer, wherein the orthographic projection of the support structure on the substrate at least partially overlaps with the orthographic projection of the peripheral portion of the first inorganic structure on the substrate.

[0021] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the orthographic projection of the support structure on the substrate does not overlap with the orthographic projection of the main body portion on the substrate.

[0022] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the thickness of the portion of the organic layer in contact with the first inorganic structure is substantially uniform.

[0023] At least one embodiment of this disclosure also provides a display device, including the display substrate provided in any of the above embodiments.

[0024] At least one embodiment of this disclosure also provides another display substrate, which includes a substrate, a plurality of sub-pixels, a pixel defining layer, and an organic layer. The plurality of sub-pixels are located on the substrate, and each sub-pixel includes a light-emitting functional layer and a first electrode and a second electrode located on both sides of the light-emitting functional layer along a direction perpendicular to the substrate. The first electrode is located between the light-emitting functional layer and the substrate, and the second electrodes of adjacent sub-pixels are continuously disposed. At least a portion of the pixel defining layer is located between the light-emitting functional layer and the first electrode. 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 organic layer is located on the side of the first electrode of the sub-pixel closer to the substrate. The pixel defining layer further includes a plurality of defining openings. At least a portion of the sub-pixels have a defining opening between adjacent sub-pixels. The portion of the organic layer located between adjacent sub-pixels includes at least one groove. At least a portion of the edge of the groove opening of each groove is exposed by the defining opening. The thickness of the light-emitting functional layer and the second electrode of the sub-pixel at the edge of the groove is less than the thickness of the portion of each overlapping with the first electrode.

[0025] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the angle between at least a portion of the side surface of the groove and the extension surface of the bottom surface of the groove is 70 to 90 degrees, and at least one of the light-emitting functional layers is separated by the at least a portion of the edge of the groove opening.

[0026] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the angle between at least a portion of the side surface of the groove and the extension surface of the bottom surface of the groove is 45 to 70 degrees, and at least one layer of the light-emitting functional layer of adjacent sub-pixels is continuously disposed in the groove.

[0027] For example, according to at least one embodiment of the present disclosure, the pixel defining layer further includes at least one first protrusion structure, the first protrusion structure being spaced apart from the pixel defining portion, and each of the first protrusion structures being located in the groove.

[0028] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the portion of the organic layer located between adjacent sub-pixels includes a plurality of the grooves.

[0029] For example, in a display substrate provided according to at least one embodiment of the present disclosure, the organic layer includes a spacer between adjacent recesses, and the pixel defining layer further includes at least one second protrusion structure, the second protrusion structure being spaced apart from the pixel defining portion and located on the side of the spacer portion away from the substrate.

[0030] At least one embodiment of this disclosure also provides another display device, including the display substrate provided in any of the above embodiments. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0032] Figure 1 is a partial planar schematic diagram of a display substrate provided in at least one embodiment of the present disclosure.

[0033] Figure 2 is a schematic diagram of a partial cross-sectional structure cut along line AA' shown in Figure 1.

[0034] Figure 3 is a partial structural schematic diagram of the display substrate in Figure 2.

[0035] Figure 4 is a partial cross-sectional schematic diagram of another display substrate provided in at least one embodiment of the present disclosure.

[0036] Figure 5 is a partial cross-sectional schematic diagram of another display substrate provided in at least one embodiment of the present disclosure.

[0037] Figure 6 is a partial cross-sectional schematic diagram of another display substrate provided in at least one embodiment of this disclosure.

[0038] Figures 7 to 13 are partial cross-sectional schematic diagrams of display substrates provided in different embodiments of this disclosure.

[0039] Figure 14 is a schematic diagram of the process of forming a groove in a display substrate according to at least one embodiment of the present disclosure.

[0040] Figure 15 is a schematic block diagram of a display device provided according to another embodiment of the present disclosure. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0042] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0043] The features such as "parallel," "perpendicular," and "identical" used in the embodiments of this disclosure include features in the strict sense of "parallel," "perpendicular," and "identical," as well as cases where "approximately parallel," "approximately perpendicular," and "approximately identical" include certain errors, taking into account measurement and errors associated with the measurement of a specific quantity (e.g., limitations of the measurement system), and represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "approximately" can mean within one or more standard deviations, or within 10% or 5% of said value. Unless otherwise specified in the following embodiments of this disclosure, the quantity of a component is implied to mean that the component may be one or more, or can be understood as at least one. "At least one" means one or more, and "more" means at least two. The term "integrated structure" used in the embodiments of this disclosure refers to two or more components formed using the same material in the same patterning process.

[0044] Single-layer organic light-emitting display devices, also known as single devices, are organic light-emitting display devices consisting of a single light-emitting layer. Due to the limited lifespan of single devices, which fails to meet user needs, tandem technology emerged. Tandem technology involves stacking and connecting two light-emitting layers of a sub-pixel in series, with a charge generation layer, such as a P-type doped charge generation layer P-CGL and an N-type doped charge generation layer N-CGL, between the stacked light-emitting layers. Compared to display substrates without tandem devices, tandem devices use N / P-CGL as a heterojunction to connect the two light-emitting layers in series. This technology achieves dual-light-emitting device series connection, significantly reducing the luminous current of the light-emitting device at the same luminous intensity, thus improving the lifespan of the organic light-emitting element and reducing power consumption.

[0045] In their research, the inventors of this application discovered that crosstalk is particularly severe in tandem devices because they require at least two evaporation processes for the light-emitting material. To mitigate crosstalk, an isolation structure can be provided around the light-emitting area of ​​the sub-pixel to isolate the light-emitting functional layer. However, introducing this isolation structure introduces new optical problems under the new process conditions, such as severe ghosting issues on the display substrate at low brightness. For example, at the edge of the isolation structure, in addition to the light-emitting functional layer, the cathode of the sub-pixel is also isolated. The isolated cathode overlaps with the charge-generating layer, causing a short circuit in the tandem device, resulting in abnormal device activation and ghosting.

[0046] This disclosure provides a display substrate and a display device. The display substrate includes a substrate, a plurality of sub-pixels, a pixel defining layer, an inorganic pattern, and an organic layer located on the substrate. Each sub-pixel includes a light-emitting functional layer and a first electrode and a second electrode located on both sides of the light-emitting functional layer along a direction perpendicular to the substrate. The first electrode is located between the light-emitting functional layer and the substrate, and the second electrodes of adjacent sub-pixels are continuously disposed. At least a portion of the pixel defining layer is located between the light-emitting functional layer and the first electrode. 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. At least a portion of the inorganic pattern is located between the first electrode of the sub-pixel and the substrate. The inorganic pattern includes at least one first inorganic structure, and the first inorganic structure includes a main body portion and a peripheral portion connected to each other. The first electrode of the main body overlaps with the first electrode of the sub-pixel at the edge, and the peripheral portion is located outside the main body. The organic layer is located between the inorganic pattern and the substrate and is in contact with the inorganic pattern. The pixel defining layer also includes a plurality of defining openings. The pixel defining portion surrounds the plurality of pixel openings and the plurality of defining openings. At least some sub-pixels have a defining opening between adjacent sub-pixels. The peripheral portion of the first inorganic structure includes a protrusion. The protrusion is located between adjacent sub-pixels and is exposed by the defining opening. The edge of the protrusion away from the main body is spaced from the organic layer in a direction perpendicular to the substrate. The light-emitting functional layer includes multiple film layers. At least one of the light-emitting functional layers is separated by the edge of the protrusion. The distance between the edge of the protrusion and the substrate is greater than the distance between the main body and the substrate.

[0047] In at least one embodiment of the display substrate provided in this disclosure, the edge of the protrusion of the first inorganic structure away from the main body is spaced from the organic layer in a direction perpendicular to the substrate. At least one of the light-emitting functional layers is separated by the edge of the protrusion, and the second electrodes of adjacent sub-pixels are continuously arranged. This is beneficial to improve the phenomenon of crosstalk between adjacent sub-pixels and to alleviate the problem of sub-pixel ghosting, thereby improving the display effect of the display substrate.

[0048] At least one embodiment of this disclosure also provides another display substrate, which includes a substrate, a plurality of sub-pixels, a pixel defining layer, and an organic layer. The plurality of sub-pixels are located on the substrate, and each sub-pixel includes a light-emitting functional layer and a first electrode and a second electrode located on both sides of the light-emitting functional layer along a direction perpendicular to the substrate. The first electrode is located between the light-emitting functional layer and the substrate, and the second electrodes of adjacent sub-pixels are continuously disposed. At least a portion of the pixel defining layer is located between the light-emitting functional layer and the first electrode. 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 organic layer is located on the side of the first electrode of the sub-pixel closer to the substrate. The pixel defining layer also includes a plurality of defining openings. At least a portion of the sub-pixels have a defining opening between adjacent sub-pixels. The portion of the organic layer located between adjacent sub-pixels includes at least one groove. At least a portion of the edge of the groove opening of each groove is exposed by the defining opening. The thickness of the light-emitting functional layer and the second electrode of the sub-pixel at the edge of the groove is less than the thickness of the portion of each overlapping with the first electrode.

[0049] In at least one embodiment of the display substrate provided in this disclosure, on the one hand, since the thickness of the light-emitting functional layer of the sub-pixel and the second electrode can both be thinned at the edge of the groove, and the charge transport path is extended by the groove, the charge transport efficiency can be reduced, thereby reducing the risk of crosstalk between adjacent sub-pixels; on the other hand, the second electrodes of adjacent sub-pixels are continuously arranged, which helps to alleviate the sub-pixel ghosting phenomenon, thereby improving the display effect of the display substrate.

[0050] The display substrate and display device provided in the embodiments of this disclosure are described below with reference to the accompanying drawings.

[0051] Figure 1 is a partial planar schematic diagram of a display substrate provided in at least one embodiment of the present disclosure; Figure 2 is a partial cross-sectional schematic diagram along line AA' shown in Figure 1; Figure 3 is a partial structural schematic diagram of the display substrate in Figure 2.

[0052] As shown in Figures 1 and 2, the display substrate includes a substrate 01, a plurality of sub-pixels 100, a pixel defining layer 200, an inorganic pattern 300, and an organic layer 400 located on the substrate 01. Each sub-pixel 100 includes a light-emitting functional layer 130 and a first electrode 110 and a second electrode 120 located on both sides of the light-emitting functional layer 130 along a direction perpendicular to the substrate 01. The first electrode 110 is located between the light-emitting functional layer 130 and the substrate 01. For example, the display substrate includes a display area and a peripheral area surrounding the display area. The plurality of sub-pixels 100 are located in the display area of ​​the display substrate. The pixel defining layer 200, the inorganic pattern 300, and the organic layer 400 may each include portions located in the display area and portions located in the peripheral area.

[0053] For example, as shown in FIG2, the light-emitting functional layer 130 may include a light-emitting layer for emitting light and a charge-generating layer 133. For example, the light-emitting functional layer 130 may be a film layer in an organic light-emitting element. For example, the light-emitting functional layer 130 may include a first light-emitting layer, a charge-generating layer (CGL) 133, and a second light-emitting layer stacked together, with the charge-generating layer 133 located between the first light-emitting layer and the second light-emitting layer. As shown in FIG2, the thicknesses of the multiple film layers included in the light-emitting functional layer 130 are only for clear illustration of each film layer and do not represent actual dimensions. For example, in the same sub-pixel 100, the first light-emitting layer and the second light-emitting layer may be light-emitting layers that emit the same color of light. For example, the first light-emitting layer in a sub-pixel 100 that emits different colors of light emits different colors of light. For example, the second light-emitting layer in a sub-pixel 100 that emits different colors of light emits different colors of light.

[0054] For example, as shown in FIG2, the film layer 131 between the charge generation layer 133 and the substrate 01 may include a first light-emitting layer and other functional layers, such as a hole injection layer between the first electrode 110 and the first light-emitting layer; or an electron transport layer between the charge generation layer 133 and the first light-emitting layer. For example, the film layer 132 between the charge generation layer 133 and the second electrode 120 may include a second light-emitting layer and other functional layers, such as a hole transport layer between the second light-emitting layer and the charge generation layer 133; or an electron transport layer and an electron injection layer between the second light-emitting layer and the second electrode 120.

[0055] For example, the hole injection layer, hole transport layer, electron transport layer, electron injection layer, charge generation layer, and second electrode mentioned above are all shared film layers for multiple sub-pixels, and can be called common layers. For example, the common layer and the second electrode mentioned above can be film layers formed using an open mask. For example, the first light-emitting layer and the second light-emitting layer can be film layers formed using a fine metal mask (FMM), and a gap can be set between the light-emitting layers of different sub-pixels.

[0056] For example, as shown in Figure 2, the charge generation layer 133 has strong conductivity, which enables the light-emitting functional layer 130 to have advantages such as long lifetime, low power consumption, and high brightness. For example, the charge generation layer 133 may include an N-type charge generation layer and a P-type charge generation layer. For example, the material of the charge generation layer 133 may be a material containing phosphorothoxy groups or a triazine material. For example, the ratio of the electron mobility of the material in the charge generation layer 133 to the electron mobility of the material in the electron transport layer is 10. -2 ~10 2 .

[0057] For example, as shown in Figure 2, the first electrode 110 can be an anode and the second electrode 120 can be a cathode.

[0058] For example, as shown in FIG2, the array substrate further includes a film layer 02, which is located between the first electrode 110 of the sub-pixel 100 and the substrate 01. The sub-pixel also includes a pixel circuit, for example, the first electrode of the sub-pixel can be electrically connected to the pixel circuit through a via N (see FIG1). For example, the film layer 02 may also include other structures, such as a passivation layer, a buffer layer, a gate insulating layer, an interlayer insulating layer, etc., which are not limited in the embodiments of this disclosure.

[0059] As shown in Figures 1 and 2, at least a portion of the pixel defining layer 200 is located between the light-emitting functional layer 130 and the first electrode 110. The pixel defining layer 200 includes a plurality of pixel openings 210 and pixel defining portions 230 located between adjacent pixel openings 210. The pixel openings 210 expose at least a portion of the first electrode 110 to define the light-emitting area of ​​the sub-pixel 100. The light-emitting functional layer 130 is disposed in contact with the first electrode 110 through the pixel openings 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 between them to emit light. For example, the light-emitting area of ​​the sub-pixel 10 refers to the area where the sub-pixel 10 effectively emits light, and the shape of the light-emitting area refers to a two-dimensional shape. For example, the shape of the light-emitting area may be the same as the shape of the orthographic projection of the portion of the first electrode 110 exposed by the pixel openings 210 onto the substrate BS.

[0060] As shown in Figures 1 and 2, at least a portion of the inorganic pattern 300 is located between the first electrode 110 of the sub-pixel 100 and the substrate 01. The inorganic pattern 300 includes at least one first inorganic structure 310, which includes a main body portion 311 and a peripheral portion 312 connected to each other. The main body portion 311 overlaps with the first electrode 110 of the sub-pixel 100, and the peripheral portion 312 is located outside the main body portion 311. For example, the outer side of the main body portion 311 refers to the side of the main body portion 311 covered by the pixel defining portion 230 that is away from the portion of the main body portion 311 that overlaps with the first electrode 110.

[0061] For example, at least a portion of the main body 311 of the first inorganic structure 310 is located in the pixel opening 210 of the sub-pixel 100. For example, the orthographic projection of the pixel opening 210 on the substrate 01 falls into the orthographic projection of the main body 311 of the first inorganic structure 310 on the substrate 01. For example, the first electrode 110 of the sub-pixel 100 is located on the first inorganic structure 310, and the first inorganic structure 310 can make the first electrode 110 have good flatness. For example, the inorganic pattern 300 can be a one-piece structure or a split structure, and the embodiments of this disclosure are not limited in this respect.

[0062] As shown in Figure 2, the organic layer 400 is located between the inorganic pattern 300 and the substrate 01, and is in contact with the inorganic pattern 300. The pixel defining layer 200 also includes a plurality of defining openings 220, with at least one defining opening 220 between adjacent sub-pixels 100. The peripheral portion 312 of the first inorganic structure 310 includes a protrusion 301 located between adjacent sub-pixels 100 and exposed by the defining opening 220. For example, the peripheral portion 312 may include a portion covered by the pixel defining portion 230.

[0063] As shown in Figures 2 and 3, the protrusion 301 of the peripheral portion 312 of the first inorganic structure 310 includes an edge 3110 away from the main body portion 311, and the edge 3110 and the organic layer 400 are spaced apart by a distance SP in a direction perpendicular to the substrate 01. The distance L1 between the edge 3110 of the protrusion 301 and the substrate 01 is greater than the distance L2 between the main body portion 311 and the substrate 01. For example, the protrusion 301 is raised relative to the organic layer 400 in a direction away from the substrate 01. The light-emitting functional layer 130 includes multiple film layers, and at least one of the light-emitting functional layers 130 is separated by the edge 3110 of the protrusion 301. The second electrodes 120 of adjacent sub-pixels 100 are continuously disposed, that is, the second electrodes 120 of each sub-pixel 100 are not separated by the aforementioned protrusion 301, and the second electrodes 120 of adjacent sub-pixels 100 are electrically connected to each other.

[0064] In at least one embodiment of the display substrate provided in this disclosure, on the one hand, since at least one of the light-emitting functional layers of the sub-pixels is separated by the protrusion, it is beneficial to improve the phenomenon of crosstalk between adjacent sub-pixels; on the other hand, the second electrodes of adjacent sub-pixels are continuously arranged, which helps to alleviate the sub-pixel ghosting phenomenon, thereby improving the display effect of the display substrate.

[0065] In some embodiments, as shown in FIG2, in the first inorganic structure 310, the distance between the peripheral portion 312 and the substrate 01 gradually increases from the direction close to the main body portion 311 to the direction away from the main body portion 311. This allows the protrusion 301 of the peripheral portion 312 to be raised relative to the organic layer 400, thereby satisfying the requirement of the protrusion 301 to block at least one film layer in the light-emitting functional layer 130.

[0066] In some embodiments, in the partial cross-sectional structure cut along line AA' shown in FIG1, the extension direction of the peripheral portion 312 of the first inorganic structure 310 may be non-linear, for example, it may extend along an arc direction, and the embodiments of this disclosure do not limit this.

[0067] In some embodiments, as shown in Figures 2 and 3, the organic layer 400 includes an inclined surface 410, on which a portion of the peripheral portion 312 of the first inorganic structure 310 is located. For example, the portion of the peripheral portion 312 of the first inorganic structure 310 excluding the protrusion 301 is located on the inclined surface 410. At least a portion of the inclined surface 410 overlaps with the pixel defining portion 230, and the protrusion 301 of the first inorganic structure 310 is the portion of the peripheral portion 312 that protrudes relative to the inclined surface 410, thereby allowing the protrusion 301 to isolate at least one film layer in the light-emitting functional layer 130.

[0068] In some embodiments, as shown in Figures 2 and 3, at least a portion of the peripheral portion 312 of the first inorganic structure 310 near the surface of the substrate 01 is a plane, the angle between this plane and the plane parallel to the substrate 01 is μ, and μ is 10 to 30 degrees. For example, μ can be other values ​​among 10 to 15 degrees, 15 to 20 degrees, 20 to 30 degrees, or 10 to 30 degrees, and the embodiments of this disclosure are not limited thereto.

[0069] In some embodiments, as shown in FIG3, the protrusion 301 has a dimension S in its extending direction, and S is 0.6 to 1.0 micrometers. For example, S can be other values ​​among 0.3 to 0.5 micrometers, 0.4 to 0.6 micrometers, 0.5 to 0.8 micrometers, 0.7 to 0.9 micrometers, or 0.6 to 1.0 micrometers, and the embodiments of this disclosure are not limited thereto.

[0070] In some embodiments, as shown in FIG3, the distance SP (i.e., the maximum distance) between the protrusion 301 and the organic layer 400 in the direction perpendicular to the substrate is 0.3 to 1.0 micrometers. For example, SP can be other values ​​among 0.3 to 0.5 micrometers, 0.5 to 0.8 micrometers, 0.6 to 0.9 micrometers, 0.7 to 1.0 micrometers, or 0.3 to 1.0 micrometers, and the embodiments of this disclosure are not limited thereto.

[0071] This configuration allows the protruding portion of the periphery to meet the requirement of at least one layer of separation for the light-emitting functional layer. At the same time, it also ensures that the second electrode between adjacent sub-pixels is continuously set to alleviate the sub-pixel ghosting phenomenon.

[0072] In some embodiments, as shown in FIG2, the light-emitting functional layer 130 includes a charge-generating layer 133 and a plurality of sub-functional layers, such as sub-functional layers 1321 and 1322, located between the charge-generating layer 133 and the second electrode 120. The charge-generating layer 133 is separated by the edge 3101 of the protrusion 301 (see FIG3), and at least one sub-functional layer is continuously disposed at the protrusion 301. For example, either sub-functional layer 1321 or sub-functional layer 1322 can be a hole transport layer, an electron transport layer, or an electron injection layer, but is not limited thereto. Furthermore, the embodiments of this disclosure do not limit the number of the plurality of sub-functional layers between the charge-generating layer 133 and the second electrode 120. FIG2 illustrates an example where the sub-functional layer 1321 between the sub-functional layer 1321 and the second electrode 120 is not separated, but the embodiments of this disclosure are not limited thereto. For example, all the sub-functional layers between the charge-generating layer 133 and the second electrode 120 may not be separated, and the embodiments of this disclosure do not limit this.

[0073] By continuously distributing at least one sub-functional layer between the charge generation layer and the second electrode, the protrusion in the first inorganic structure can be effectively separated from the second electrode of the sub-pixel, thereby ensuring that the second electrode of the sub-pixel is not blocked by the protrusion and alleviating the sub-pixel ghosting phenomenon.

[0074] In some embodiments, as shown in FIG3, the protrusion 301 of the first inorganic structure 310 includes an end face 3101 away from the main body 311, and the end face 3101 is inclined toward the main body 311. For example, the end face 3101 is inclined toward the main body 311 with reference to the edge 3110 of the main body 311. For example, the protrusion 301 includes a surface near the organic layer 400 and a surface away from the organic layer 400, and the two surfaces are connected by the end face 3101. The edge of the surface of the protrusion 301 near the organic layer 400 can be the edge 3110, and the edge 3110 is further away from the main body 311 than the edge of the surface of the protrusion 301 away from the organic layer 400.

[0075] This allows for an expansion of the space in the protrusion used to cut off at least one layer of the light-emitting functional layer. This enables the layers of the light-emitting functional layer near the first electrode (e.g., layer 131, charge generation layer 133, etc.) to diffuse and distribute at the end face of the protrusion, allowing for layer-by-layer cutting off at the end face. Furthermore, each layer after cutting off can fall between the protrusion and the organic layer, effectively preventing a short circuit between the charge generation layer in the light-emitting functional layer and the second electrode.

[0076] In some embodiments, as shown in FIG3, at least a portion of the end face 3101 of the protrusion 301 of the first inorganic structure 310 is a plane, and the angle between the plane and the plane parallel to the substrate 01 is β, and β is 10 to 30 degrees, for example, 15 to 20 degrees, 20 to 25 degrees, 25 to 30 degrees or other values ​​among 10 to 30 degrees. This allows the film layer in the light-emitting functional layer to be better separated at the end face, thereby effectively alleviating the ghosting phenomenon of the sub-pixel.

[0077] In some embodiments, as shown in FIG2, the portion of the organic layer 400 that contacts the peripheral portion 312 of the first inorganic structure 310 has a first average thickness T1, and the portion of the organic layer 400 that contacts the main body portion 311 of the first inorganic structure 310 has a second average thickness T2, wherein the first average thickness T1 is greater than the second average thickness T2. For example, the organic layer 400 includes a flat portion located between the main body portion 311 of the first inorganic structure 310 and the substrate 01, and the dimension of the flat portion in the direction perpendicular to the substrate 01 is the aforementioned second average thickness T2. For example, the aforementioned flat portion of the organic layer 400 and the portion of the organic layer 400 that contacts the peripheral portion 312 are integral structures. For example, the organic layer 400 may be fabricated using a half-tone mask (HTM). For example, during the process of patterning the first inorganic structure by etching solution, a portion of the organic layer located between adjacent sub-pixels (e.g., the portion located between adjacent protrusions and the portion located between the protrusions and the organic layer 400 shown in FIG2) is etched together, thereby creating a gap between the protrusions and the organic layer.

[0078] By making the portion of the organic layer in contact with the periphery of the first inorganic structure thicker, it is beneficial to make the protrusion of the first inorganic structure rise relative to the organic layer, so that the protrusion can play a role in isolating the film layer in the light-emitting functional layer.

[0079] In some embodiments, as shown in FIG2, the inorganic pattern 300 further includes at least one second inorganic structure 320. The second inorganic structure 320 includes a portion overlapping the pixel opening 210 and a portion located outside the pixel opening 210, and the portion of the second inorganic structure 320 located outside the pixel opening 210 is covered by the pixel defining portion 230. For example, the second inorganic structure 320 may have the same or similar shape as the first inorganic structure 310. For example, the second inorganic structure 320 may be substantially parallel to the first electrode 110 of the sub-pixel 100, that is, the portion of the second inorganic structure 320 located outside the pixel opening 210 is not raised, but is flat along with the portion located inside the pixel opening 210.

[0080] In some embodiments, as shown in FIG2, the pixel defining portion 230 covering the second inorganic structure 320 has a different morphology than the pixel defining portion 230 covering the first inorganic structure 310. For example, in the cross-sectional view shown in FIG2, in direction X, the size of the pixel defining portion 230 covering the second inorganic structure 320 is larger than the size of the pixel defining portion 230 covering the first inorganic structure 310, thereby ensuring that the pixel defining portion 230 completely covers the portion of the second inorganic structure 320 located outside the pixel opening 210.

[0081] In some embodiments, as shown in FIG2, the plurality of sub-pixels 100 include adjacent first sub-pixels 101 and second sub-pixels 102. The first electrode 110 of the first sub-pixel 101 overlaps with the main body 311 of the first inorganic structure 310, and the first electrode 110 of the second sub-pixel 102 overlaps with the second inorganic structure 320. The protrusion 301 of the first inorganic structure 310 is exposed by the defined opening 220 between the first sub-pixel 101 and the second sub-pixel 102. That is, in the adjacent first sub-pixel 101 and second sub-pixel 102, by making the protrusion 301 in the first inorganic structure 310 overlapping with the first electrode 110 of the first sub-pixel 101 exposed by the defined opening 220, at least one film layer in the light-emitting functional layer 130 of the first sub-pixel 101 can be separated, thereby reducing the risk of crosstalk between the first sub-pixel 101 and the second sub-pixel 102 and alleviating the ghosting phenomenon of the first sub-pixel 101.

[0082] It is worth noting that, as shown in FIG2, the portion of the second inorganic structure 320 overlapping with the first electrode 110 of the second sub-pixel 102 located outside the pixel opening 210 is covered by the pixel limiting portion 230, thereby allowing the light-emitting functional layer 130 of the second sub-pixel 102 to extend between the protrusion 301 and the organic layer 400 in the first inorganic structure 310. The protrusion 301 in the first inorganic structure 310 can increase the difficulty of the "climbing" of the light-emitting functional layer 130 of the second sub-pixel 102, so as to facilitate the non-continuous setting with the light-emitting functional layer 130 of the first sub-pixel 101, thereby reducing the risk of crosstalk between the first sub-pixel 101 and the second sub-pixel 102.

[0083] Figure 4 is a partial cross-sectional schematic diagram of another display substrate provided in at least one embodiment of the present disclosure.

[0084] In some embodiments, as shown in FIG4, a plurality of sub-pixels 100 include adjacent first sub-pixels 101 and second sub-pixels 102. The first electrode 110 of the first sub-pixel 101 and the first electrode 110 of the second sub-pixel 102 overlap with the main body 311 of a first inorganic structure 310. The protrusions 301 of the first inorganic structure 310 overlapped by the first electrode 110 of the first sub-pixel 101 and the first electrode 110 of the second sub-pixel 102 are all exposed by a defined opening 220 located between the first sub-pixel 101 and the second sub-pixel 102. That is, in the defined opening 220 between the first sub-pixel 101 and the second sub-pixel 102, at least one film layer of the light-emitting functional layer 130 of the first sub-pixel 101 is separated by the protrusions 301 in the first inorganic structure 310 overlapping with the first sub-pixel 101, and at least one film layer of the light-emitting functional layer 130 of the second sub-pixel 102 is separated by the protrusions 301 in the first inorganic structure 310 overlapping with the second sub-pixel 102.

[0085] This configuration can more effectively reduce the risk of crosstalk between the first and second sub-pixels. Furthermore, since the second electrodes of the first and second sub-pixels are set consecutively, the ghosting phenomenon of the first sub-pixel and the ghosting phenomenon of the second sub-pixel can be alleviated respectively.

[0086] For other structural features in Figure 4, please refer to the relevant descriptions of Figures 2 and 3 in the above embodiments, which will not be repeated here.

[0087] Figure 5 is a partial cross-sectional schematic diagram of another display substrate provided in at least one embodiment of the present disclosure. For example, the display substrate shown in Figure 5 differs from the display substrate in Figure 4 above in that the portion of the organic layer located between adjacent sub-pixels includes grooves. Other features can be found in the relevant descriptions of Figure 4 in the above embodiments, and will not be repeated here.

[0088] In some embodiments, as shown in FIG5, the organic layer 400 includes at least one groove 420, with one groove 420 between at least two adjacent sub-pixels 100. The groove 420 is exposed by defining an opening 220, and at least a portion of the orthographic projection of the groove 420 onto the substrate 01 does not overlap with the orthographic projection of the inorganic pattern 300 onto the substrate 01. For example, at least a portion of the groove 420 is located between first inorganic structures 310 overlapping with adjacent sub-pixels 100 (or between the first inorganic structure and the second inorganic structure). For example, when at least one layer of the light-emitting functional layer 130 of the first sub-pixel 101 is separated by a protrusion 301 in the first inorganic structure 310 overlapping with the first sub-pixel 101, and at least one layer of the light-emitting functional layer 130 of the second sub-pixel 102 is separated by a protrusion 301 in the first inorganic structure 310 overlapping with the second sub-pixel 102, the separated portion of the light-emitting functional layer 130 of the first sub-pixel 101 can fall into the groove 420, and the separated portion of the light-emitting functional layer 130 of the second sub-pixel 102 can also fall into the groove 420. The second electrodes 120 of both the first sub-pixel 101 and the second sub-pixel 102 include portions located in the groove 420 and are continuously disposed thereon.

[0089] In some embodiments, as shown in FIG5, at least one layer (e.g., sub-functional layer 1321) in the light-emitting functional layer 130 of adjacent sub-pixels 100 located between the charge generation layer 133 and the second electrode 120 can be continuously disposed, and the thickness of the continuously disposed film layer can be reduced at the groove 420 (e.g., at the edge of the groove opening), and the groove 420 can increase the extension path, thereby reducing the charge transfer efficiency and reducing the risk of crosstalk between adjacent sub-pixels 100.

[0090] In some embodiments, as shown in FIG5, the groove 420 is located on the side of the protrusion 301 of the first inorganic structure 310 away from the main body 311. The orthographic projection of the protrusion 301 on the substrate 01 does not overlap with the orthographic projection of the groove 420 on the substrate 01. For example, in a direction parallel to the substrate (e.g., in direction X), there is a gap P (i.e., minimum distance) between the protrusion 301 and the groove 420. For example, the gap P can be 0.05-0.3 micrometers, such as 0.1 micrometer, 0.2 micrometer, or 0.3 micrometers, and the embodiments of this disclosure are not limited thereto.

[0091] This configuration allows the second electrode to include a portion located in the organic layer corresponding to the aforementioned interval P, thereby providing a buffer and ensuring the continuous arrangement of the second electrode.

[0092] In some embodiments, referring to FIG5, the portion of the organic layer 400 located between adjacent sub-pixels 100 may include a plurality of spaced grooves 420, for example, 2 to 3, but not limited thereto. This effectively reduces the thickness of the continuously disposed film layers in the light-emitting functional layer of the sub-pixel and further extends the transmission path, thereby reducing the charge transfer efficiency of the continuously disposed film layers in the light-emitting functional layer and lowering the risk of crosstalk between adjacent sub-pixels.

[0093] In some embodiments, referring to FIG5, at least a portion of the side surfaces of the cross-section of the groove 420 cut by a plane have a slope angle α, the plane being perpendicular to the substrate 01 and parallel to the arrangement direction of adjacent sub-pixels 100 located on both sides of the groove 420. For example, the plane is parallel to direction X and perpendicular to the substrate 01. For example, the slope angle α can be 25-40 degrees, such as 30 degrees, and the embodiments of this disclosure are not limited thereto.

[0094] In some embodiments, referring to FIG5, the groove 420 has a size of 0.4-0.8 micrometers perpendicular to the substrate 01, but the embodiments of this disclosure are not limited thereto.

[0095] This configuration helps ensure that the second electrode of the sub-pixel is not interrupted by the groove (e.g., the edge of the groove opening) and allows the second electrode to extend continuously within the groove, thus achieving good continuity.

[0096] Figure 6 is a partial cross-sectional schematic diagram of another display substrate provided in at least one embodiment of this disclosure. For example, the display substrate shown in Figure 6 differs from the display substrate in Figure 2 above in that the structure of the organic layer is different, and the display substrate also includes a support structure. Other features can be found in the description of Figure 2 in the above embodiments, and will not be repeated here.

[0097] In some embodiments, referring to FIG6, the display substrate further includes a support structure 500. The support structure 500 is located between the organic layer 400 and the substrate 01, and is in contact with the organic layer 400. The orthographic projection of the support structure 500 on the substrate 01 at least partially overlaps with the orthographic projection of the peripheral portion 312 of the first inorganic structure 310 on the substrate 01. For example, the support structure 500 may be located between the organic layer 400 and the film layer 02. For example, the support structure 500 may elevate a portion of the organic layer 400 so that this portion of the organic layer 400 can bulge, thereby causing the peripheral portion 312 of the first inorganic structure 310 to be inclined relative to the main body portion 311. For example, during the process of patterning the first inorganic structure 310 by etching solution, a portion of the organic layer 400 located between adjacent sub-pixels 100 (e.g., the portion located between the protrusion and the organic layer 400 shown in FIG. 6) is etched together, thereby creating a gap between the protrusion 301 and the organic layer 400, so that at least one film layer (such as film layer 131 and charge generation layer 133) in the light-emitting functional layer 130 can be isolated by the protrusion 301.

[0098] In some embodiments, referring to FIG6, the orthographic projection of the support structure 500 on the substrate 01 may fall within the orthographic projection of the peripheral portion 312 of the first inorganic structure 310 on the substrate 01. For example, the edge of the support structure 500 away from the main body portion 311 of the first inorganic structure 310 may be substantially flush with the edge of the protrusion 301 away from the main body portion 311 of the first inorganic structure 310. For example, the peripheral portion 312 of the first inorganic structure 310 includes a portion in contact with the organic layer 400, and the orthographic projection of this portion on the substrate 01 at least partially overlaps with the orthographic projection of the support structure 500 on the substrate 01.

[0099] In some embodiments, as shown in FIG6, the orthographic projection of the support structure 500 on the substrate 01 does not overlap with the orthographic projection of the main body 311 of the first inorganic structure 310 on the substrate 01. This allows the main body 311 of the first inorganic structure 310 to have good flatness, which in turn allows the first electrode 110 located on the main body 311 to have good flatness, thereby ensuring that the sub-pixel has good light emission effect.

[0100] In some embodiments, as shown in FIG6, the thickness of the portion of the organic layer 400 in contact with the first inorganic structure 310 is substantially uniform. For example, the portion of the organic layer 400 in contact with the first inorganic structure 310 includes a main body portion 311 and a portion of a peripheral portion 312, with another portion of the peripheral portion 312 serving as a protrusion 301. The portion of the organic layer 400 located between the aforementioned portion of the peripheral portion 312 and the substrate 01 is supported by a support structure 500.

[0101] In some embodiments, referring to FIG6, the thickness of the organic layer 400 may be uniform. For example, the thickness of the portion of the organic layer 400 located between the first inorganic structure 310 and the substrate 01 may be uniform. For example, during the formation of the organic layer 400, the organic material layer covering the edge of the first electrode 110 of the support structure 500 away from the sub-pixel (e.g., the second sub-pixel 102) may be thicker, and during the patterning formation of the first inorganic structure 310 by the etching solution, the portion of the organic material layer that contacts the edge of the peripheral portion 312 of the first inorganic structure 310 is etched together, thereby thinning the thicker organic material layer while forming the protrusion 301 in the first inorganic structure 310, thereby making the portion of the finally formed organic layer 400 located between the first inorganic structure 310 and the substrate 01 have a uniform thickness.

[0102] In some embodiments, referring to FIG6, the thickness of the portion of the organic layer 400 located between the protrusion 301 in the first inorganic structure 310 and the substrate 01 can be smaller, and less than the thickness of the portion of the organic layer 400 in contact with the first inorganic structure 310. For example, during the formation of the organic layer 400, the organic material layer can be made to have a uniform thickness, and during the patterning formation of the first inorganic structure 310 by etching solution, the portion of the organic material layer in contact with the edge of the peripheral portion 312 of the first inorganic structure 310 is etched together. As a result, while forming the protrusion 301 in the first inorganic structure 310, the portion of the organic material layer in contact with the edge of the peripheral portion 312 of the first inorganic structure 310 is thinned, so that the portion of the organic layer 400 located between the protrusion 301 in the first inorganic structure 310 and the substrate 01 has a smaller thickness. This configuration simplifies the fabrication process of the organic layer 400.

[0103] In some embodiments, referring to FIG6, the cross-section of the support structure 500 can be rectangular, elliptical, circular, polygonal or irregular in shape, and the embodiments of this disclosure are not limited thereto.

[0104] At least one embodiment of this disclosure also provides another display substrate. Figures 7 to 13 are partial cross-sectional schematic diagrams of display substrates provided in different embodiments of this disclosure.

[0105] As shown in Figure 7, the display substrate includes a substrate 01, a plurality of sub-pixels 100, a pixel defining layer 200, and an organic layer 400 located on the substrate 01. Each sub-pixel 100 includes a light-emitting functional layer 130 and a first electrode 110 and a second electrode 120 located on both sides of the light-emitting functional layer 130 along a direction perpendicular to the substrate 01. The first electrode 110 is located between the light-emitting functional layer 130 and the substrate 01. For example, the display substrate includes a display area and a peripheral area surrounding the display area. The plurality of sub-pixels 100 are located in the display area of ​​the display substrate, and both the pixel defining layer 200 and the organic layer 400 may include portions located in the display area and portions located in the peripheral area.

[0106] For example, as shown in FIG7, the light-emitting functional layer 130 may include a light-emitting layer for emitting light and a charge-generating layer 133. For example, the light-emitting functional layer 130 may be a film layer in an organic light-emitting element. For example, the light-emitting functional layer 130 may include a first light-emitting layer, a charge-generating layer (CGL) 133, and a second light-emitting layer stacked together, with the charge-generating layer 133 located between the first light-emitting layer and the second light-emitting layer. As shown in FIG7, the thicknesses of the multiple film layers included in the light-emitting functional layer 130 are only for clear illustration of each film layer and do not represent actual dimensions. For example, in the same sub-pixel 100, the first light-emitting layer and the second light-emitting layer may be light-emitting layers that emit the same color of light. For example, the first light-emitting layer in a sub-pixel 100 that emits different colors of light emits different colors of light. For example, the second light-emitting layer in a sub-pixel 100 that emits different colors of light emits different colors of light.

[0107] For example, as shown in FIG7, the film layer 131 between the charge generation layer 133 and the substrate 01 may include a first light-emitting layer and other functional layers, such as a hole injection layer between the first electrode 110 and the first light-emitting layer; or an electron transport layer between the charge generation layer 133 and the first light-emitting layer. For example, the film layer 132 between the charge generation layer 133 and the second electrode 120 may include a second light-emitting layer and other functional layers, such as a hole transport layer between the second light-emitting layer and the charge generation layer 133; or an electron transport layer and an electron injection layer between the second light-emitting layer and the second electrode 120.

[0108] For example, the hole injection layer, hole transport layer, electron transport layer, electron injection layer, charge generation layer, and second electrode are all shared film layers for multiple sub-pixels, and can be called common layers. For example, the aforementioned common layer and second electrode can be film layers formed using an open mask. For example, the first light-emitting layer and the second light-emitting layer can be film layers formed using a fine metal mask (FMM), and a gap can be set between the light-emitting layers of different sub-pixels.

[0109] For example, as shown in Figure 7, the charge generation layer 133 has strong conductivity, which enables the light-emitting functional layer 130 to have advantages such as long lifetime, low power consumption, and high brightness. For example, the charge generation layer 133 may include an N-type charge generation layer and a P-type charge generation layer. For example, the material of the charge generation layer 133 may be a material containing phosphorothoxy groups or a triazine material. For example, the ratio of the electron mobility of the material in the charge generation layer 133 to the electron mobility of the material in the electron transport layer is 10. -2 ~10 2 .

[0110] For example, as shown in Figure 7, the first electrode 110 can be an anode and the second electrode 120 can be a cathode.

[0111] For example, as shown in FIG7, the array substrate further includes a film layer 02, which is located between the first electrode 110 of the sub-pixel 100 and the substrate 01. The sub-pixel also includes a pixel circuit, for example, the first electrode of the sub-pixel can be electrically connected to the pixel circuit through a via N (see FIG1). For example, the film layer 02 may also include other structures, such as a passivation layer, a buffer layer, a gate insulating layer, an interlayer insulating layer, etc., which are not limited in the embodiments of this disclosure.

[0112] As shown in FIG. 7, at least a portion of the pixel defining layer 200 is located between the light-emitting functional layer 130 and the first electrode 110. The pixel defining layer 200 includes a plurality of pixel openings 210 and pixel defining portions 230 located between adjacent pixel openings 210. The pixel openings 210 expose at least a portion of the first electrode 110 to define the light-emitting area of ​​the sub-pixel 100. The light-emitting functional layer 130 is disposed in contact with the first electrode 110 through the pixel openings 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 between them to emit light. For example, the light-emitting area of ​​the sub-pixel 10 refers to the area where the sub-pixel 10 effectively emits light, and the shape of the light-emitting area refers to a two-dimensional shape. For example, the shape of the light-emitting area may be the same as the shape of the orthographic projection of the portion of the first electrode 110 exposed by the pixel openings 210 onto the substrate BS.

[0113] As shown in FIG. 7, the organic layer 400 is located on the side of the first electrode 110 of the sub-pixel 100 near the substrate 01. For example, the organic layer 400 is located between the first electrode 100 of the sub-pixel 100 and the substrate 01, and is in contact with the first electrode 100. The pixel defining layer 200 also includes a plurality of defining openings 220, and at least a portion of the sub-pixels 100 have a defining opening 220 between adjacent sub-pixels 100. The portion of the organic layer 400 located between adjacent sub-pixels 100 includes at least one groove 430, and at least a portion of the edge 4310 of the groove opening of each groove 430 is exposed by the defining opening 220.

[0114] As shown in Figure 7, the thickness of the light-emitting functional layer 130 and the second electrode 120 of the sub-pixel 100 at the edge 4310 of the groove 430 is less than the thickness of their respective overlapping portions with the first electrode 110. For example, the thickness of the light-emitting functional layer 130 and the second electrode 120 of the sub-pixel 100 can be reduced at the edge 4310, thereby reducing the charge transfer efficiency of the light-emitting functional layer 130 and the second electrode 120 of the sub-pixel 100, thus reducing the risk of crosstalk between adjacent sub-pixels. Furthermore, the second electrodes 120 of adjacent sub-pixels 100 are continuously arranged. That is, the second electrodes 120 of each sub-pixel 100 are not separated by the edge 4310 of the groove 430, and the second electrodes 120 of adjacent sub-pixels 100 are electrically connected to each other, which helps to alleviate the sub-pixel ghosting phenomenon and thus improves the display efficiency of the display substrate.

[0115] In at least one embodiment of the display substrate provided in this disclosure, on the one hand, since the thickness of the light-emitting functional layer of the sub-pixel and the second electrode can both be thinned at the edge of the groove, and the charge transport path is extended by the groove, the charge transport efficiency can be reduced, thereby reducing the risk of crosstalk between adjacent sub-pixels; on the other hand, the second electrodes of adjacent sub-pixels are continuously arranged, which helps to alleviate the sub-pixel ghosting phenomenon, thereby improving the display effect of the display substrate.

[0116] In some embodiments, as shown in FIG7, in a direction perpendicular to the substrate 01 (i.e., in direction Z), the size of the groove 430 is greater than the total thickness of the multiple film layers in the light-emitting functional layer 130, but not greater than 1 micrometer.

[0117] This configuration helps ensure that the second electrode of the sub-pixel is not interrupted by the groove, thus ensuring the continuity of the second electrode of the sub-pixel. This effectively reduces the voltage drop caused by the interruption of the second electrode and reduces cross voltage, improving display uniformity.

[0118] In some embodiments, as shown in FIG7, the angle ε between at least a portion of the side surface 4320 of the groove 430 and the extended surface of the bottom surface 4330 of the groove 430 is 45 to 70 degrees, and at least one layer of the light-emitting functional layer 130 of the adjacent sub-pixel 100 is continuously disposed at the groove 430. For example, the aforementioned angle ε can be 45 to 50 degrees, 50 to 55 degrees, 55 to 60 degrees, 65 to 70 degrees, or other values ​​among 45 to 70 degrees, and the embodiments of this disclosure do not limit this.

[0119] This design helps to ensure that the groove reduces the thickness of the light-emitting functional layer and the second electrode of the sub-pixel, thereby reducing the risk of crosstalk between adjacent sub-pixels.

[0120] In some embodiments, as shown in FIG8, the portion of the organic layer 400 located between adjacent sub-pixels 100 may include a plurality of grooves 430, such as 2 to 3 or 3 to 5, which are not limited in the embodiments of this disclosure. For other structural features in FIG8, please refer to the relevant description of FIG7 in the above embodiments, which will not be repeated here.

[0121] By increasing the number of grooves, the charge transport path can be effectively extended to reduce charge transport efficiency, thereby reducing the risk of crosstalk between adjacent sub-pixels.

[0122] In some embodiments, as shown in FIG9, the pixel defining layer 200 further includes at least one first protrusion structure 240, which is spaced apart from the pixel defining portion 230 and is located in the groove 430. For example, the provision of the first protrusion structure 240 can further extend the charge transport path to reduce the charge transport efficiency of the light-emitting functional layer of the sub-pixel and the second electrode, respectively.

[0123] In some embodiments, as shown in FIG9, the angle λ between the first protrusion structure 240 and the bottom surface 4330 of the groove 430 can be 45 to 70 degrees. For example, the angle λ can be 45 to 50 degrees, 50 to 55 degrees, 55 to 60 degrees, 65 to 70 degrees, or other values ​​among 45 to 70 degrees. This configuration is beneficial to improving the ability of the first protrusion structure to reduce the thickness of the light-emitting functional layer and the second electrode of the sub-pixel, thereby further reducing the risk of crosstalk between adjacent sub-pixels.

[0124] For other structural features in Figure 9, please refer to the relevant description of Figure 7 in the above embodiments, which will not be repeated here.

[0125] In some embodiments, as shown in FIG10, the organic layer 400 includes a spacer 440 located between adjacent recesses 430, and the pixel defining layer 200 further includes at least one second protrusion structure 260, which is spaced apart from the pixel defining portion 230 and located on the side of the spacer 440 away from the substrate 01. For example, the cross-section of the second protrusion structure 260 may be trapezoidal, but is not limited thereto. For example, the surface of the second protrusion structure 260 away from the substrate 01 does not exceed the surface of the pixel defining portion 230 away from the substrate 01. For example, in a direction perpendicular to the substrate 01 (i.e., in direction Z), the size of the second protrusion structure 260 may be greater than the depth of the recess 430.

[0126] By setting a second protrusion structure, the charge transport path can be further extended to reduce the charge transport efficiency of the light-emitting functional layer of the sub-pixel and the second electrode, respectively.

[0127] In some embodiments, as shown in FIG10, the angle ψ between the second protrusion structure 260 and the surface of the spacer portion 440 away from the substrate 01 can be 45 to 70 degrees. For example, the angle ψ can be 45 to 50 degrees, 50 to 55 degrees, 55 to 60 degrees, 65 to 70 degrees, or other values ​​among 45 to 70 degrees.

[0128] This design allows for a reduction in the thickness of the light-emitting functional layer and the second electrode of the sub-pixel through the second protrusion structure, thereby further reducing the risk of crosstalk between adjacent sub-pixels.

[0129] For other structural features in Figure 10, please refer to the relevant description of Figure 7 in the above embodiments, which will not be repeated here.

[0130] In some embodiments, as shown in FIG11, the angle ε between at least a portion of the side surface 4320 of the groove 430 and the extension surface of the bottom surface 4330 of the groove 430 can be 70 to 90 degrees, such as 90 degrees. In this embodiment, at least one layer of the light-emitting functional layer 130 is separated by at least a portion of the edge of the groove 430. For example, when the angle between at least a portion of the side surface 4320 of the groove 430 and the extension surface of the bottom surface 4330 of the groove 430 is large, all film layers in the light-emitting functional layer 130 can be separated, but this is not limited to this. For example, when the angle between at least a portion of the side surface 4320 of the groove 430 and the extension surface of the bottom surface 4330 of the groove 430 is small, a portion of the film layers of the light-emitting functional layer 130 can be separated, while another portion of the film layers can be continuously disposed. The embodiments of this disclosure do not limit this.

[0131] By isolating at least a portion of the film layers in the light-emitting functional layer, the risk of crosstalk between adjacent sub-pixels can be effectively reduced.

[0132] For other structural features in Figure 11, please refer to the relevant description of Figure 7 in the above embodiments, which will not be repeated here.

[0133] In some embodiments, as shown in FIG12, when the portion of the organic layer 400 located between adjacent sub-pixels 100 includes a plurality of grooves 430, the angle ε between at least a portion of the side surface 4320 of the groove 430 and the extension surface of the bottom surface 4330 of the groove 430 can be 70 to 90 degrees, such as 90 degrees, which helps to further ensure that at least a portion of the film layer in the light-emitting functional layer is isolated, so as to effectively reduce the risk of crosstalk between adjacent sub-pixels.

[0134] For other structural features in Figure 12, please refer to the relevant description of Figure 8 in the above embodiments, which will not be repeated here.

[0135] In some embodiments, as shown in FIG13, the pixel defining layer 200 includes at least one first protrusion structure 240, which is spaced apart from the pixel defining portion 230 and located in a groove 430. The angle ε between at least a portion of the side surface 4320 of the groove 430 and the extension surface of the bottom surface 4330 of the groove 430 is 70 to 90 degrees, and the angle λ between the first protrusion structure 240 and the bottom surface 4330 of the groove 430 is 70 to 90 degrees. Under this scheme, it is advantageous to further ensure that at least a portion of the film layer in the light-emitting functional layer is isolated, so as to effectively reduce the risk of crosstalk between adjacent sub-pixels.

[0136] For other structural features in Figure 13, please refer to the relevant description of Figure 9 in the above embodiments, which will not be repeated here.

[0137] In some embodiments, referring to FIG10, when the angle ε between at least a portion of the side surface 4320 of the groove 430 and the extended surface of the bottom surface 4330 of the groove 430 is 70 to 90 degrees, and the angle ψ between the second protrusion structure 260 and the surface of the spacer 440 away from the substrate 01 is 70 to 90 degrees, at least one film layer in the light-emitting functional layer 130 is separated by at least a portion of the groove opening of the groove 430, or by the edge of the surface of the second protrusion structure 260 away from the substrate 01, thereby effectively reducing the risk of crosstalk between adjacent sub-pixels.

[0138] Figure 14 is a schematic diagram of the process of forming a groove in a display substrate according to at least one embodiment of the present disclosure.

[0139] In some embodiments, as shown in FIG14, an organic layer 400 is first formed by an exposure process, then a groove 430 in the organic layer 400 is formed by a dry etching process, followed by the formation of the first electrode 110 of each sub-pixel 100, and then the pixel defining portion 230 is formed. For example, the organic layer can be a planarization layer, but is not limited thereto. For example, the above-described process of forming the first electrode and the pixel defining portion can be carried out using conventional processes, and the embodiments of this disclosure are not limited thereto.

[0140] Figure 15 is a schematic block diagram of a display device according to another embodiment of the present disclosure. As shown in Figure 15, a display device provided in an embodiment of the present disclosure includes any of the above-described display substrates.

[0141] For example, a display device may or may not have a color filter layer.

[0142] For example, the display device also includes a cover plate located on the light-emitting side of the array substrate.

[0143] For example, the display device can be an organic light-emitting diode display device or other display device, as well as any product or component with display function, such as a television, digital camera, mobile phone, watch, tablet computer, laptop computer, or navigator that includes the display device. This embodiment is not limited to this.

[0144] The following points need to be explained:

[0145] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure, and other structures can be referred to the general design.

[0146] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure may be combined with each other.

[0147] The above description is merely an exemplary embodiment of this disclosure and is not intended to limit the scope of protection of this disclosure, which is determined by the appended claims.

Claims

1. A display substrate, comprising: Substrate; Multiple sub-pixels are located on the substrate. Each sub-pixel includes a light-emitting functional layer and a first electrode and a second electrode located on both sides of the light-emitting functional layer along a direction perpendicular to the substrate. The first electrode is located between the light-emitting functional layer and the substrate, and the second electrodes of adjacent sub-pixels are continuously arranged. A pixel defining layer, at least a portion of which is located between the light-emitting functional layer and the first electrode, the pixel defining layer including a plurality of pixel openings and pixel defining portions located between adjacent pixel openings, the pixel openings exposing at least a portion of the first electrode; An inorganic pattern, at least a portion of which is located between the first electrode of the sub-pixel and the substrate, the inorganic pattern including at least one first inorganic structure, the first inorganic structure including a main body portion and a peripheral portion connected to each other, the main body portion overlapping the first electrode of the sub-pixel, and the peripheral portion located outside the main body portion; An organic layer is located between the inorganic pattern and the substrate, and is in contact with the inorganic pattern. The pixel defining layer further includes a plurality of defining openings, the pixel defining portion surrounds the plurality of pixel openings and the plurality of defining openings, at least some of the sub-pixels have a defining opening between adjacent sub-pixels, the peripheral portion of the first inorganic structure includes a protrusion, the protrusion is located between adjacent sub-pixels and exposed by the defining opening, the edge of the protrusion away from the main body portion is spaced from the organic layer in a direction perpendicular to the substrate, the light-emitting functional layer includes multiple film layers, at least one of the light-emitting functional layers is separated by the edge of the protrusion, and the distance between the edge of the protrusion and the substrate is greater than the distance between the main body portion and the substrate.

2. The display substrate according to claim 1, wherein, In the first inorganic structure, the distance between the peripheral portion and the substrate gradually increases from the direction closer to the main body portion to the direction farther away from the main body portion.

3. The display substrate according to claim 2, wherein, At least a portion of the peripheral portion of the first inorganic structure near the surface of the substrate is a plane, and the angle between the plane and the plane parallel to the substrate is 10 to 30 degrees.

4. The display substrate according to any one of claims 1-3, wherein, The maximum distance between the protrusion and the organic layer in the direction perpendicular to the substrate is 0.3 to 1.0 micrometers.

5. The display substrate according to any one of claims 1-4, wherein, The organic layer includes an inclined surface, a portion of the peripheral portion of the first inorganic structure is located on the inclined surface, at least a portion of the inclined surface overlaps with the pixel defining portion, and the protrusion of the first inorganic structure is the portion of the peripheral portion that protrudes relative to the inclined surface.

6. The display substrate according to any one of claims 1-5, wherein, The light-emitting functional layer includes a charge-generating layer and a plurality of sub-functional layers located between the charge-generating layer and the second electrode. The charge-generating layer is separated by the edge of the protrusion, and at least one sub-functional layer is continuously disposed at the protrusion.

7. The display substrate according to any one of claims 1-6, wherein, The protrusion of the first inorganic structure includes an end face away from the main body, and the end face is inclined toward the main body.

8. The display substrate according to claim 7, wherein, At least a portion of the end face of the protrusion of the first inorganic structure is a plane, and the angle between the plane and the plane parallel to the substrate is 10 to 30 degrees.

9. The display substrate according to any one of claims 1-8, wherein, The portion of the organic layer that contacts the peripheral portion of the first inorganic structure has a first average thickness, and the portion of the organic layer that contacts the main body portion of the first inorganic structure has a second average thickness, wherein the first average thickness is greater than the second average thickness.

10. The display substrate according to any one of claims 1-9, wherein, The inorganic pattern further includes at least one second inorganic structure, each second inorganic structure including a portion overlapping the pixel opening and a portion located outside the pixel opening, the portion of the second inorganic structure located outside the pixel opening being covered by the pixel defining portion. The plurality of sub-pixels includes adjacent first sub-pixels and second sub-pixels. The first electrode of the first sub-pixel overlaps with the main body of the first inorganic structure, and the first electrode of the second sub-pixel overlaps with the second inorganic structure. The protrusion of the first inorganic structure is exposed by a defined opening between the first sub-pixel and the second sub-pixel.

11. The display substrate according to any one of claims 1-9, wherein, The plurality of sub-pixels includes adjacent first sub-pixels and second sub-pixels, wherein the first electrode of the first sub-pixel and the first electrode of the second sub-pixel respectively overlap with the main body of a first inorganic structure. The protrusions of the first inorganic structure overlapping the first electrode of the first sub-pixel and the first electrode of the second sub-pixel are both exposed by a defined opening located between the first sub-pixel and the second sub-pixel.

12. The display substrate according to any one of claims 1-11, wherein, The organic layer includes at least one groove, with one groove between at least two adjacent sub-pixels, and the groove is exposed by the defined opening, wherein at least a portion of the orthographic projection of the groove on the substrate does not overlap with the orthographic projection of the inorganic pattern on the substrate.

13. The display substrate according to claim 12, wherein, The groove is located on the side of the protrusion of the first inorganic structure away from the main body, and the orthographic projection of the protrusion on the substrate does not overlap with the orthographic projection of the groove on the substrate.

14. The display substrate according to claim 12 or 13, wherein, The portion of the organic layer located between adjacent sub-pixels includes multiple spaced grooves.

15. The display substrate according to claim 13, wherein, In a direction parallel to the substrate, the minimum distance between the protrusion and the groove of the first inorganic structure is 0.05 to 0.3 micrometers.

16. The display substrate according to any one of claims 12-15, wherein, At least a portion of the sides of the cross-section of the groove cut by a plane have a slope angle, the plane being perpendicular to the substrate and parallel to the arrangement direction of adjacent sub-pixels located on both sides of the groove, the slope angle being 25 to 40 degrees.

17. The display substrate according to any one of claims 1-7, further comprising: A support structure is located between the organic layer and the substrate and is in contact with the organic layer. The orthographic projection of the support structure on the substrate at least partially overlaps with the orthographic projection of the peripheral portion of the first inorganic structure on the substrate.

18. The display substrate according to claim 17, wherein, The orthographic projection of the support structure on the substrate does not overlap with the orthographic projection of the main body on the substrate.

19. The display substrate according to claim 17 or 18, wherein, The thickness of the portion of the organic layer that contacts the first inorganic structure is substantially uniform.

20. A display device comprising the display substrate according to any one of claims 1-19.

21. A display substrate, comprising: Substrate; Multiple sub-pixels are located on the substrate. Each sub-pixel includes a light-emitting functional layer and a first electrode and a second electrode located on both sides of the light-emitting functional layer along a direction perpendicular to the substrate. The first electrode is located between the light-emitting functional layer and the substrate, and the second electrodes of adjacent sub-pixels are continuously arranged. A pixel defining layer, at least a portion of which is located between the light-emitting functional layer and the first electrode, the pixel defining layer including a plurality of pixel openings and pixel defining portions located between adjacent pixel openings, the pixel openings exposing at least a portion of the first electrode; An organic layer is located on the side of the first electrode of the sub-pixel closer to the substrate. The pixel defining layer further includes multiple defining openings, with at least one defining opening between adjacent sub-pixels in a portion of the sub-pixels. The portion of the organic layer located between adjacent sub-pixels includes at least one groove, with at least a portion of the edge of the groove exposed by the defining opening. The thickness of the light-emitting functional layer of the sub-pixel and the second electrode at the edge of the groove is less than the thickness of their respective overlapping portions with the first electrode.

22. The display substrate according to claim 21, wherein, The angle between at least a portion of the side surface of the groove and the extended surface of the bottom surface of the groove is 70 to 90 degrees, and at least one of the light-emitting functional layers is separated by at least a portion of the edge of the groove opening.

23. The display substrate according to claim 21, wherein, The angle between at least a portion of the side surface of the groove and the extended surface of the bottom surface of the groove is 45 to 70 degrees, and at least one layer of the light-emitting functional layer of the adjacent sub-pixel is continuously disposed in the groove.

24. The display substrate according to any one of claims 21-23, wherein, The pixel defining layer further includes at least one first protrusion structure, which is spaced apart from the pixel defining portion, and each first protrusion structure is located in the groove.

25. The display substrate according to any one of claims 21-24, wherein, The portion of the organic layer located between adjacent sub-pixels includes a plurality of the grooves.

26. The display substrate according to claim 25, wherein, The organic layer includes a spacer between adjacent grooves, and the pixel defining layer further includes at least one second protrusion structure, which is spaced apart from the pixel defining portion and is located on the side of the spacer away from the substrate.

27. A display device comprising the display substrate according to any one of claims 21-26.

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