Display substrate and display apparatus

Abstract

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

Description

Display substrate and display device TECHNICAL FIELD

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

[0002] With the development of display technology, users have higher and higher requirements for the power consumption and service life of display devices. An organic light-emitting display device with a tandem structure improves the service life and brightness of the light-emitting device and reduces power consumption by adding at least one light-emitting layer and a charge generation layer in the organic light-emitting device, thereby meeting the needs of users for the power consumption and service life of display devices.

[0003] SUMMARY

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

[0005] Embodiments of the present disclosure provide a display substrate, comprising a substrate and a plurality of sub-pixels and a plurality of limiting structures on the substrate. Each of at least some of the sub-pixels comprises a light-emitting functional layer, the light-emitting functional layer comprising a plurality of film layers; the plurality of limiting structures are located between at least two adjacent sub-pixels of different colors and are configured to separate at least one layer of the light-emitting functional layer. The plurality of sub-pixels comprise a plurality of first color sub-pixels, and the limiting structure immediately adjacent to at least one first color sub-pixel in the plurality of limiting structures is a first limiting structure; at least part of the first limiting structure extends in a first direction, the light-emitting area of the first color sub-pixel comprises a first edge extending in the first direction, and the first limiting structure comprises two limiting end points, at least one of which protrudes relative to the edge end point of the first edge immediately adjacent to the at least one limiting end point in the first direction, or the first limiting structure has a curved shape, and the total length of the first limiting structure is greater than the size of the light-emitting area of the first color sub-pixel in at least one direction.

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

[0007] For example, according to embodiments of the present disclosure, the total length of the part of the first limiting structure extending in the first direction is greater than the length of the first edge.

[0008] For example, according to an embodiment of the present disclosure, the shape of the section of the limiting structure taken by a plane perpendicular to the extending direction of the limiting structure comprises an inverted trapezoid, the bottom angle between the waist of the inverted trapezoid and the bottom side away from the substrate is 50-80 degrees, the length of the bottom side of the inverted trapezoid close to the substrate is 1-6 microns, and the thickness of the limiting structure is 0.8-1.8 microns.

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

[0010] For example, according to an embodiment of the present disclosure, the light-emitting region of the first color sub-pixel further comprises a second edge extending along a second direction intersecting the first direction, and the distance between the straight line extending along the second direction on which the orthographic projection of one of the two limiting end points on the substrate is located and the orthographic projection of the second edge on the substrate is less than 0.5 microns.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0025] For example, according to an embodiment of the present disclosure, the plurality of limiting structures further include a plurality of second limiting structures, at least located between adjacent second color sub-pixels and third color sub-pixels, and a distance between the second limiting structure and a light-emitting area of the second color sub-pixel is less than a distance between the second limiting structure and a light-emitting area of the third color sub-pixel.

[0026] An embodiment of the present disclosure provides a display device, including any of the display substrates described above. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0029] FIG. 3 is a schematic diagram of a partial planar structure of a display substrate according to an example provided by an embodiment of the present disclosure.

[0030] FIG. 4 is a schematic diagram of a partial cross-sectional structure along the AA' line shown in FIG. 3.

[0031] FIG. 5 is an enlarged view of the pixel unit shown in FIG. 3.

[0032] FIG. 6 is a schematic diagram of a focused ion beam (FIB) microscope view of a cross-section of the first limiting structure 210 shown in FIG. 4.

[0033] FIG. 7 is a schematic diagram of a partial planar structure of a display substrate according to another example provided by embodiments of the present disclosure.

[0034] FIG. 8 is a schematic diagram of a planar structure of a pixel unit shown in FIG. 7.

[0035] FIG. 9 is a schematic diagram of a partial planar structure of a display substrate according to another example provided by embodiments of the present disclosure.

[0036] FIG. 10 is a schematic diagram of a planar structure of a pixel unit shown in FIG. 9.

[0037] FIG. 11 is a schematic diagram of a partial planar structure of a display substrate according to another example provided by embodiments of the present disclosure.

[0038] FIG. 12 is a schematic diagram of a planar structure of a pixel unit shown in FIG. 11.

[0039] FIG. 13 is a schematic diagram of a partial planar structure of a display substrate according to another example provided by embodiments of the present disclosure.

[0040] FIG. 14 is a schematic diagram of a planar structure of a pixel unit shown in FIG. 13.

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

[0042] FIG. 16 is a schematic diagram of a partial planar structure of a display substrate according to another example provided by embodiments of the present disclosure.

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

[0044] FIG. 18 is a schematic diagram of a partial planar structure of a display substrate according to another example provided by embodiments of the present disclosure.

[0045] FIG. 19 is a schematic block diagram of a display device according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] In order to make the objects, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present disclosure.

[0047] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second", and similar terms are used herein merely to distinguish one element from another, and are not intended to imply any order or sequence. The terms "comprises", "comprising", "includes", "including" and the like are intended to be open-ended terms that specifically permit presence of one or more elements or integers not expressly listed. The terms "about" and "substantially" are used herein to refer to a range of values that one of ordinary skill in the art would consider as a reasonable p ermissible variation around the recited value.

[0048] The terms "parallel", "perpendicular", and "same" as used in the embodiments of the present disclosure include the strict "parallel", "perpendicular", "same" and also include the "approximately parallel", "approximately perpendicular", "approximately same" with certain errors, which, taking into account the measurement and the error related to the measurement of a specific quantity (for example, the limitation of the measurement system), represents the acceptable deviation range for the specific value determined by the person skilled in the art. For example, "approximately" can represent within one or more standard deviations, or within 10% or 5% of the value. In the following of the embodiments of the present disclosure, when the quantity of a component is not specifically indicated, it means that the component can be one or more, or can be understood as at least one. "At least one" means one or more, and "a plurality of" means at least two.

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

[0050] As shown in FIG. 1, the display substrate includes three light-emitting layers EML1, EML2, and EML3 of different colors, one side of the light-emitting layer is provided with a hole transport layer HTL, and the other side of the light-emitting layer is provided with a hole blocking layer HBL, an electron transport layer ETL, and a cathode CO which are sequentially stacked. For example, the hole transport layer HTL, the hole blocking layer HBL, the electron transport layer ETL, and the cathode CO can all be integral film layers.

[0051] As shown in FIG. 2, the light-emitting functional layer in the display substrate includes multiple light-emitting layers arranged in a stack, such as light-emitting layer EML1-1 and light-emitting layer EML1-2 arranged in a stack, light-emitting layer EML2-1 and light-emitting layer EML2-2 arranged in a stack, and light-emitting layer EML3-1 and light-emitting layer EML3-2 arranged in a stack. For example, light-emitting layer EML1-1 and light-emitting layer EML1-2 can be light-emitting layers of the same color, or light-emitting layers of different colors; light-emitting layer EML2-1 and light-emitting layer EML2-2 can be light-emitting layers of the same color, or light-emitting layers of different colors; and light-emitting layer EML3-1 and light-emitting layer EML3-2 can be light-emitting layers of the same color, or light-emitting layers of different colors. For example, light-emitting layer EML1-1, light-emitting layer EML2-1, and light-emitting layer EML3-1 are light-emitting layers of different colors, and light-emitting layer EML1-2, light-emitting layer EML2-2, and light-emitting layer EML3-2 are light-emitting layers of different colors.

[0052] As shown in FIG. 2, the light-emitting layers arranged in a stack are provided with full-layer charge generation layers, such as P-type doped charge generation layer P-CGL and N-type doped charge generation layer N-CGL, which can serve as common layers of the light-emitting functional layer. Both P-type doped charge generation layer P-CGL and N-type doped charge generation layer N-CGL are full-layer film layers. The charge generation layers have strong conductivity, which can make the light-emitting functional layer have the advantages of long service life, low power consumption, and high brightness.

[0053] The device with light-emitting layers arranged in a stack and charge generation layers described above can be referred to as a Tandem device. Compared with the display substrate shown in FIG. 1 without a Tandem device, the Tandem device included in the display substrate shown in FIG. 2 uses N / P-CGL as a heterojunction and connects two light-emitting layers in series. This technology realizes the connection of two light-emitting devices in series, greatly reduces the light-emitting current of the light-emitting device under the same light-emitting intensity, and improves the service life and reduces the power consumption of the organic light-emitting element.

[0054] As shown in FIG. 2, hole blocking layer HBL can be provided between charge generation layer N-CGL and the light-emitting layer, and hole transport layer HTL can be provided between charge generation layer P-CGL and the light-emitting layer. Hole transport layer HTL can be provided on the side of light-emitting layer EML1-1 away from hole blocking layer HBL, and hole blocking layer HBL, electron transport layer ETL, and cathode CO can be provided in sequence on the side of light-emitting layer EML1-2 away from hole transport layer HTL. For example, hole transport layer HTL, hole blocking layer HBL, electron transport layer ETL, and cathode CO are all full-layer film layers.

[0055] In the research, the inventors of the present application found that the charge generation layers of two adjacent sub-pixels in a tandem device are continuous film layers, and there is a phenomenon of lateral charge migration, which causes the display substrate to have a single-color chromaticity deviation at a low gray scale, such as causing crosstalk between adjacent sub-pixels, resulting in color deviation of the display substrate.

[0056] The present disclosure provides a display substrate and a display device. The display substrate includes a substrate, a plurality of sub-pixels and a plurality of limiting structures. Each of at least some of the sub-pixels includes a light-emitting functional layer, and the light-emitting functional layer includes a plurality of film layers. The plurality of limiting structures are located between at least two adjacent sub-pixels of different colors, and are configured to separate at least one layer of the light-emitting functional layer. The plurality of sub-pixels include a plurality of first color sub-pixels, and a limiting structure adjacent to at least one first color sub-pixel in the plurality of limiting structures is a first limiting structure. At least part of the first limiting structure extends in a first direction, and a light-emitting area of the first color sub-pixel includes a first edge extending in the first direction. The first limiting structure includes two limiting end points, and in the first direction, at least one limiting end point protrudes relative to an edge end point of the first edge adjacent to the at least one limiting end point. Alternatively, the first limiting structure has a curved shape, and a total length of the first limiting structure is greater than a size of the light-emitting area of the first color sub-pixel in at least one direction.

[0057] The display substrate provided by the embodiments of the present disclosure has the advantages that by setting the first limiting structure to separate at least one layer of the light-emitting functional layer, and at the same time, setting the limiting end point of the first limiting structure to protrude relative to the edge end point of the first edge, or setting the total length of the first limiting structure to be greater than the size of the light-emitting area of the first color sub-pixel in at least one direction, the low gray scale crosstalk problem caused by the leakage current between the first color sub-pixel and the sub-pixel of other colors can be reduced, and the possibility of peeling of the first limiting structure can be reduced.

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

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

[0060] As shown in FIGS. 3 and 4, the display substrate includes a substrate 01, a plurality of sub-pixels 100 and a plurality of limiting structures 200 located on the substrate 01. Each of at least some of the sub-pixels 100 includes a light-emitting functional layer 130, and the light-emitting functional layer 130 includes a plurality of film layers. For example, the at least some of the sub-pixels 100 are located in a display area of the display substrate, i.e., an area for displaying an image, and the display substrate further includes a peripheral area surrounding the display area.

[0061] For example, as shown in FIG. 4, the sub-pixel 100 further includes a first electrode 110 and a second electrode 120 located on both sides of the light-emitting functional layer 130 in a direction perpendicular to the substrate substrate 01 (e.g., the Z direction shown in FIG. 4), and the first electrode 110 is located between the light-emitting functional layer 130 and the substrate substrate 01.

[0062] For example, as shown in FIG. 4, the light-emitting functional layer 130 can include a light-emitting layer for emitting light and a charge generation layer 133. For example, the light-emitting functional layer 130 can be a film layer in an organic light-emitting element. For example, the light-emitting functional layer 130 can include a first light-emitting layer (EML) 131, a charge generation layer (CGL) 133, and a second light-emitting layer (EML) 132 stacked, and the charge generation layer 133 is located between the first light-emitting layer 131 and the second light-emitting layer 132. The thickness of the plurality of film layers included in the light-emitting functional layer 130 shown in FIG. 2 is only for clearly showing each film layer, and does not represent the actual size.

[0063] For example, as shown in FIG. 4, the charge generation layer 133 has strong conductivity, which can make the light-emitting functional layer 130 have the advantages of long service life, low power consumption, and high brightness. For example, the same sub-pixel can include a tandem light-emitting element, such as a Tandem OLED. Of course, embodiments of the present disclosure are not limited thereto, and the light-emitting functional layer 130 of each sub-pixel 100 can also include only one light-emitting layer.

[0064] For example, in the same sub-pixel 100, the first light-emitting layer 131 and the second light-emitting layer 132 can be light-emitting layers that emit the same color light. For example, the first light-emitting layer 131 in a sub-pixel 100 that emits different color light emits different color light. For example, the second light-emitting layer 132 in a sub-pixel 100 that emits different color light emits different color light. Of course, embodiments of the present disclosure are not limited thereto, for example, in the same sub-pixel 100, the first light-emitting layer 131 and the second light-emitting layer 132 can be light-emitting layers that emit different color light, and by providing light-emitting layers that emit different color light in the same sub-pixel 100, the light emitted by the multiple light-emitting layers included in the sub-pixel 100 can be mixed into white light, and the color of the light emitted by each sub-pixel 100 can be adjusted by providing a color film layer.

[0065] For example, in each sub-pixel 100, the light-emitting functional layer 130 can further include a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL).

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

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

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

[0069] For example, the material of the electron transport layer can include aromatic heterocyclic compounds, such as benzimidazole derivatives, imidazo-pyridine derivatives, benzimidazo-phenanthroline derivatives and other imidazole derivatives; pyrimidine derivatives, triazine derivatives and other azine derivatives; quinoline derivatives, isoquinoline derivatives, phenanthroline derivatives and other compounds containing nitrogen-containing six-membered ring structures (also including compounds having phosphine oxide-based substituents on heterocycles) and the like.

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

[0071] For example, the ratio of the electron mobility of the material of the charge generation layer 133 to the electron mobility of the electron transport layer is 10 -2 ~ 10 2 .

[0072] For example, the first electrode 110 can be an anode, and the second electrode 120 can be a cathode. For example, the cathode can be formed of a material with high conductivity and low work function, for example, the cathode can be made of a metal material. For example, the anode can be formed of a transparent conductive material with a high work function.

[0073] For example, as shown in FIG. 4, the side of the first electrode 110 facing the substrate 01 is also provided with other structures 02, such as pixel circuits, signal lines, and various insulating layers electrically connected to the first electrode 110 of the sub-pixel 100, such as flat layers, passivation layers, buffer layers, gate insulating layers, interlayer insulating layers, and the like.

[0074] As shown in FIG. 3 and FIG. 4, the plurality of limiting structures 200 are located between at least two adjacent different color sub-pixels 100, and are configured to separate at least one layer of the light-emitting functional layer 130. For example, at least one layer of the common layer is broken at the edge of the limiting structure 200 in the light-emitting functional layer 130. For example, all the film layers of the light-emitting functional layer 130 and the second electrode 120 are broken by the limiting structure 200. By breaking at least one layer of the common layer at the edge of the limiting structure 200 between the adjacent two different color sub-pixels 100, the probability of crosstalk between the adjacent sub-pixels 100 can be reduced. For example, the common layer and the second electrode 120 can be film layers formed by an open mask.

[0075] As shown in FIG. 3 and FIG. 4, the plurality of sub-pixels 100 include a plurality of first color sub-pixels 101, and the limiting structure 200 adjacent to at least one first color sub-pixel 101 in the plurality of limiting structures 200 is a first limiting structure 210. For example, the limiting structure 200 adjacent to each first color sub-pixel 101 in the plurality of limiting structures 200 is the first limiting structure 210. The limiting structure 200 adjacent to the first color sub-pixel 101 being the first limiting structure 210 can mean that the distance between the first limiting structure 210 and the light-emitting area 10 of the first color sub-pixel 101 is the closest, such as that there is no other limiting structure 200 between the first limiting structure 210 and the light-emitting area 10 of the first color sub-pixel 101, and the distance between the other limiting structure 200 and the light-emitting area 10 of the first color sub-pixel 101 is greater than the distance between the first limiting structure 210 and the light-emitting area 10 of the first color sub-pixel 101.

[0076] As shown in FIG. 3, at least part of the first limiting structure 210 extends in a first direction, and the first limiting structure 210 includes two limiting end points 211. As shown in FIG. 3, the first direction is the X direction, but is not limited thereto, and the first direction can also be a direction opposite to the direction indicated by the arrow of the X direction. For example, the two limiting end points 211 of the first limiting structure 210 can be points on the two ends of the two sides of the first limiting structure 210 in the first direction, such as the two points farthest away from each other on the two ends.

[0077] As shown in FIG. 3, the light-emitting region 10 of the first color sub-pixel 101 includes a first edge 11 extending along a first direction, in which at least one limiting end point 211 protrudes relative to an edge end point 111 of the first edge 11 adjacent to the at least one limiting end point 211. For example, a straight line extending along a direction perpendicular to the first direction (such as the Y direction shown in FIG. 3, or a direction opposite to the direction indicated by the Y direction arrow) passes through the orthographic projection of the at least one limiting end point 211 on the substrate substrate 01, but does not pass through the orthographic projection of the first edge 11 on the substrate substrate 01. For example, a straight line extending along a direction perpendicular to the first direction passes through the orthographic projection of the edge end point 111 of the first edge 11 on the substrate substrate 01, and passes through the orthographic projection of the first limiting structure 210 on the substrate substrate 01.

[0078] The display substrate provided by the embodiments of the present disclosure can reduce the possibility of peeling of the first limiting structure while reducing the low gray scale crosstalk problem caused by the leakage current between the first color sub-pixel and other color sub-pixels by setting the first limiting structure to separate at least one layer of the light-emitting functional layer, and setting the limiting end point of the first limiting structure to protrude relative to the edge end point of the first edge.

[0079] In some examples, as shown in FIG. 3, the distance between the two limiting end points 211 of the first limiting structure 210 is greater than the length of the first edge 11. For example, in the display substrate shown in FIG. 3, each first limiting structure 210 includes a continuous long strip-shaped structure, and the distance between the two limiting end points 211 of each first limiting structure 210 can be the length of each first limiting structure 210 in the first direction, such as the length of the first limiting structure 210 being greater than the length of the first edge 11.

[0080] In some examples, as shown in FIG. 3, the total length of the portion of the first limiting structure 210 extending along the first direction is greater than the length of the first edge 11. For example, the first limiting structure 210 extends along the first direction, and the total length of the first limiting structure 210 is greater than the length of the first edge 11.

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

[0082] In some examples, as shown in FIG. 3, the orthographic projection of the first edge 11 on the substrate substrate 01 is a first orthographic projection, the orthographic projection of the first limiting structure 210 on the substrate substrate 01 is a second orthographic projection, and the orthographic projection of the first orthographic projection on a straight line extending along the first direction is entirely within the orthographic projection of the second orthographic projection on the straight line. For example, both of the two limiting end points 211 of the first limiting structure 210 protrude outward relative to the two edge end points 111 of the first edge 11. By setting the length of the first limiting structure 210 to be greater than the length of the first edge 11 while setting both of the two limiting end points 211 of the first limiting structure 210 to protrude outward relative to the two edge end points 111 of the first edge 11, the crosstalk between the first color sub-pixel 101 and other color sub-pixels 100 can be further reduced, and the leakage current blocking effect can be improved.

[0083] In some examples, as shown in FIG. 3, the plurality of sub-pixels 100 includes a plurality of pixel units 010, and the plurality of pixel units 010 are arranged in an array along a first direction and a second direction, and the second direction intersects the first direction. For example, the first direction is the X direction, and the second direction is the Y direction. Each pixel unit 010 includes one first color sub-pixel 101, one second color sub-pixel 102, and one third color sub-pixel 103, the first color sub-pixel 101 and the second color sub-pixel 102 are arranged along the second direction, and the second color sub-pixel 102 and the third color sub-pixel 103 are arranged along the first direction. For example, the sub-pixels in each pixel unit 010 are arranged in a Real RGB pixel arrangement.

[0084] In some examples, as shown in FIG. 3, at least one side of the same first color sub-pixel 101 in the second direction is provided with a first limiting structure 210. For example, both sides of the same first color sub-pixel 101 in the second direction are provided with a first limiting structure 210.

[0085] In some examples, as shown in FIG. 3, the first color sub-pixel 101 is a blue sub-pixel, one of the second color sub-pixel 102 and the third color sub-pixel 103 is a red sub-pixel, and the other is a green sub-pixel. For example, the second color sub-pixel 102 is a red sub-pixel, and the third color sub-pixel 103 is a green sub-pixel. Of course, the embodiments of the present disclosure are not limited to the second color sub-pixel 102 being a red sub-pixel and the third color sub-pixel 103 being a green sub-pixel, and the colors of the second color sub-pixel 102 and the third color sub-pixel 103 can be interchanged.

[0086] For example, as shown in FIG. 3, the same first color sub-pixel 101 is provided with one first limiting structure 210 on each side in the second direction, and the distance between the two first limiting structures 210 located on the two sides of the first color sub-pixel 101 and the light-emitting area 10 of the first color sub-pixel 101 is equal. For example, the first limiting structure 210 is located between the first color sub-pixel 101 and the second color sub-pixel 102, and the first limiting structure 210 is located between the first color sub-pixel 101 and the third color sub-pixel 103. By arranging the first limiting structure 210 between the first color sub-pixel 101 and the second color sub-pixel 102 and between the first color sub-pixel 101 and the third color sub-pixel 103, it is beneficial to improve the current leakage blocking effect of the first limiting structure 210 between the first color sub-pixel 101 and the second color sub-pixel 102 and the current leakage blocking effect of the first limiting structure 210 between the first color sub-pixel 101 and the third color sub-pixel 103.

[0087] In some examples, as shown in FIG. 3, the first limiting structure 210 is located between the first color sub-pixel 101 and the second color sub-pixel 102, and the ratio of the distance between the first limiting structure 210 and the light-emitting area 10 of the second color sub-pixel 102 to the distance between the first limiting structure 210 and the light-emitting area 10 of the first color sub-pixel 101 is 0.9-1.1. For example, the two sides of the first limiting structure 210 are the first color sub-pixel 101 and the second color sub-pixel 102, respectively, and the distance between the first limiting structure 210 and the light-emitting area 10 of the first color sub-pixel 101 is equal to the distance between the first limiting structure 210 and the light-emitting area 10 of the second color sub-pixel 102. For example, the two sides of the first limiting structure 210 are the first color sub-pixel 101 and the third color sub-pixel 103, respectively, and the distance between the first limiting structure 210 and the light-emitting area 10 of the first color sub-pixel 101 is equal to the distance between the first limiting structure 210 and the light-emitting area 10 of the third color sub-pixel 103.

[0088] In some examples, as shown in FIG. 3, the light-emitting area 10 of the first color sub-pixel 101 further includes a second edge 12 extending in the second direction, and the second direction intersects the first direction, such as the second direction being the Y direction shown in FIG. 3, and the first direction is perpendicular to the second direction. For example, the first direction and the second direction can be interchanged. For example, the shape of the light-emitting area 10 of the first color sub-pixel 101 can be quadrilateral, such as rectangle. For example, the length of the first edge 11 of the light-emitting area 10 of the first color sub-pixel 101 is greater than the length of the second edge 12.

[0089] For example, as shown in FIG. 3, the extension line of the orthographic projection of the second edge 12 of the first color sub-pixel 101 on the substrate 01 passes through the orthographic projection of the first limiting structure 210 on the substrate 01. For example, the extension line of the orthographic projection of the second edge 12 of the first color sub-pixel 101 on the substrate 01 passes through the orthographic projection of the light-emitting region 10 of at least one of the second color sub-pixel 102 and the third color sub-pixel 103 on the substrate 01.

[0090] For example, as shown in FIG. 3, the three sub-pixels 100 in the same pixel unit 010 are arranged in a triangle. For example, the second color sub-pixel 102 and the third color sub-pixel 103 are located in the same row, and the edges of the light-emitting regions 10 of the second color sub-pixel 102 and the third color sub-pixel 103 are located on both sides of the first limiting structure 210 in the first direction, so as to increase the width of the conduction channel of the second electrode 120.

[0091] For example, as shown in FIG. 3, the first electrode 110 of each sub-pixel 100 includes a main electrode overlapping the light-emitting region 10 and a connection electrode electrically connected with the pixel circuit, and the main electrode and the connection electrode are integrally arranged. For example, the shape of each main electrode is similar to the shape of the corresponding light-emitting region 10. For example, the connection electrode of the first color sub-pixel 101 is located between the light-emitting regions 10 of two adjacent first color sub-pixels 101, and a straight line extending along the second direction passes through the orthographic projection of the connection electrode of the first color sub-pixel 101 on the substrate 01 and the interval between the orthographic projections of the light-emitting regions 10 of the second color sub-pixel 102 and the third color sub-pixel 103 arranged adjacent to the first color sub-pixel 101 on the substrate 01. For example, in the same pixel unit 010, the connection electrode of the second color sub-pixel 102 is located between the light-emitting regions 10 of the first color sub-pixel 101 and the second color sub-pixel 102, and the connection electrode of the third color sub-pixel 103 is located between the light-emitting regions 10 of the first color sub-pixel 101 and the third color sub-pixel 103.

[0092] For example, as shown in FIG. 3, in the direction perpendicular to the substrate 01, the connecting electrode of the first electrode 110 of the first color sub-pixel 101 does not overlap with the first defining structure 210, and the connecting electrode of the first electrode 110 of at least one of the second color sub-pixel 102 and the third color sub-pixel 103 overlaps with the first defining structure 210. For example, a straight line extending along the first direction passes through the orthographic projection of the first defining structure 210 on the substrate 01 and the orthographic projection of the connecting electrode of the first color sub-pixel 101 on the substrate 01; in the direction perpendicular to the substrate 01, the connecting electrode of the first electrode 110 of the second color sub-pixel 102 and the third color sub-pixel 103 both overlap with the first defining structure 210, so as to ensure that the spacing between the sub-pixels 100 is small, and at the same time, the first defining structure 210 is arranged to reduce the crosstalk between the first color sub-pixel 101 and other color sub-pixels 100.

[0093] In some examples, as shown in FIG. 3, the plurality of defining structures 200 further comprises a plurality of second defining structures 220, at least located between adjacent second color sub-pixels 102 and third color sub-pixels 103. For example, the second color sub-pixels 102 and the third color sub-pixels 103 are arranged alternately along the first direction, and the second defining structure 220 extending along the second direction is arranged between any adjacent second color sub-pixel 102 and third color sub-pixel 103.

[0094] For example, as shown in FIG. 3, the shape of the light-emitting area 10 of the second color sub-pixel 102 and the third color sub-pixel 103 is a quadrilateral, such as a rectangle. For example, the area of the light-emitting area 10 of the first color sub-pixel 101 is greater than the area of the light-emitting area 10 of the third color sub-pixel 103, and the area of the light-emitting area 10 of the third color sub-pixel 103 is greater than the area of the light-emitting area 10 of the second color sub-pixel 102. For example, the length of the edge of the light-emitting area 10 of the third color sub-pixel 103 extending along the first direction is greater than the length of the edge of the light-emitting area 10 of the second color sub-pixel 102 extending along the first direction, and the length of the edge of the light-emitting area 10 of the third color sub-pixel 103 extending along the second direction is equal to the length of the edge of the light-emitting area 10 of the second color sub-pixel 102 extending along the second direction.

[0095] In some examples, as shown in FIG. 3, the ratio of the distance between the second defining structure 220 and the light-emitting area 10 of the second color sub-pixel 102 to the distance between the second defining structure 220 and the light-emitting area 10 of the third color sub-pixel 103 is 0.9-1.1. For example, the distance between the second defining structure 220 and the light-emitting area 10 of the second color sub-pixel 102 is equal to the distance between the second defining structure 220 and the light-emitting area 10 of the third color sub-pixel 103.

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

[0097] For example, as shown in FIG. 3, a straight line extending in the second direction passes through the orthographic projection of the second defining structure 220 on the substrate 01 and the orthographic projection of the connecting electrode of the first color sub-pixel 101 on the substrate 01. For example, a straight line extending in the first direction passes through the first defining structure 210 but not the second defining structure 220. For example, a certain interval is provided between the first defining structure 210 and the second defining structure 220.

[0098] In some examples, as shown in FIGS. 3 and 4, the display substrate further includes a pixel defining pattern 300 (PDL) on the substrate 01, the pixel defining pattern 300 including a plurality of openings 310 and a pixel defining portion 320 surrounding the plurality of openings 310, the plurality of openings 310 being configured to define at least part of the light emitting region 10 of the sub-pixel 100.

[0099] For example, as shown in FIGS. 3 and 4, one sub-pixel 100 corresponds to at least one opening 310, at least part of the light emitting functional layer 130 of the sub-pixel 100 being located in the opening 310 corresponding to the sub-pixel 100, and the opening 310 being configured to expose the first electrode 110.

[0100] For example, as shown in FIG. 4, when the light emitting functional layer 130 is formed in the opening 310 of the pixel defining pattern 300, the first electrode 110 and the second electrode 120 located on both sides of the light emitting functional layer 130 can drive the light emitting functional layer 130 in the opening 310 to emit light. For example, the opening 310 of the pixel defining pattern 300 is used to define the light emitting region 10 of the sub-pixel 100. The above-mentioned light emitting region 10 can refer to the region of the sub-pixel 100 that effectively emits light, and the shape of the light emitting region 10 refers to a two-dimensional shape, for example, the shape of the light emitting region 10 can be the same as the shape of the opening 310 of the pixel defining pattern 300.

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

[0102] FIG. 5 is an enlarged view of the pixel unit shown in FIG. 3.

[0103] For example, as shown in FIG. 3 and FIG. 5, the distance (e.g., PDL gap) between the light emitting regions 10 of adjacent sub-pixels 100 is a, the distance between the first limiting structure 210 and the light emitting region 10 of the sub-pixel 100 is b, the length of the edge of the first limiting structure 210 close to the substrate 01 on the cross section perpendicular to the first direction is c, the length of the first limiting structure 210 is d, the length of the first edge 11 of the light emitting region 10 of the first color sub-pixel 101 is e, the range of a is 10-30 microns, such as 15-25 microns, b=a / 2-c, the range of c is 1-6 microns, and e

[0104] For example, as shown in FIG. 5, the range of a is 12-25 microns, or 15-20 microns, or 18-28 microns, etc., which is not limited. For example, the range of c is 2-4 microns, or 3-5 microns, etc., which is not limited.

[0105] For example, as shown in FIG. 3 and FIG. 5, the distance between the second limiting structure 220 and the light emitting region 10 of the second color sub-pixel 102 can be not greater than the distance between the first limiting structure 210 and the light emitting region 10, such as equal to the distance, or less than the distance.

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

[0107] In some examples, as shown in FIG. 4 and FIG. 6, the shape of the cross section of the limiting structure 200, such as the first limiting structure 210, includes an inverted trapezoid, the bottom angle between the waist of the inverted trapezoid and the bottom edge 201 away from the substrate 01 is 50-80 degrees, the length of the bottom edge 202 close to the substrate 01 on the side of the inverted trapezoid is 1-6 microns, and the thickness of the limiting structure 200, such as the first limiting structure 210, is 0.8-1.8 microns. By setting the shape of the limiting structure 200, such as the first limiting structure 210, the first limiting structure 210 can block at least one layer of the light emitting functional layer 130.

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

[0109] For example, as shown in FIG. 3 and FIG. 4, the cross section of the second limiting structure 220 cut by the plane perpendicular to the Y direction can have the same characteristics as the above-mentioned cross section of the first limiting structure 210, which will not be repeated here.

[0110] The display substrate provided by the embodiments of the present disclosure is beneficial to improve the crosstalk display defect caused by the material in the light-emitting functional layer of different sub-pixels by limiting the relative position relationship, relative spacing, and relative size relationship between the limiting structure and different color sub-pixels.

[0111] For example, as shown in FIG. 6, the second electrode 120 of the sub-pixel 100 is further provided with an encapsulation layer 140 away from the substrate base plate 01. For example, the encapsulation layer 140 can include inorganic encapsulation layer, organic encapsulation layer, and inorganic encapsulation layer which are sequentially stacked.

[0112] In some examples, as shown in FIG. 3 and FIG. 4, the display substrate further includes a plurality of spacers 400 located away from the substrate base plate 01 on the pixel limiting part 320. For example, the spacer 400 (PS) is configured to support a fine metal mask (FMM Mask) when the light-emitting layer is made.

[0113] In some examples, as shown in FIG. 3 and FIG. 4, the plurality of limiting structures 200 and the plurality of spacers 400 are provided in the same layer and have the same material, and the height of at least part of the spacers 400 is greater than the height of the plurality of limiting structures 200. For example, the material of the limiting structure 200 and the spacer 400 can adopt a negative photoresist.

[0114] For example, as shown in FIG. 3 and FIG. 4, to reduce the mask production cost and simplify the production process, the limiting structure 200 for separating at least one layer of the light emitting functional layer 130 and the spacer 400 for supporting the FMM mask can be made of the same halftone mask. For example, in the material to be formed into the limiting structure 200 and the spacer 400, the position for forming the limiting structure 200 corresponds to the mask using the first transmittance Tr1, and the position for forming the spacer 400 corresponds to the mask using the second transmittance Tr2, the first transmittance Tr1>the second transmittance Tr2, so that the thickness of the limiting structure 200 is less than the thickness of the spacer 400, avoiding the dark spot or color mixing caused by the FMM mask scratching caused by the limiting structure 200. For example, the thickness of the limiting structure 200 and the height difference of the spacer 400 can be more than 0.3 microns, such as 0.4 microns, 0.5 microns or 0.6 microns, and the embodiments of the present disclosure will not be repeated. For example, the transmittance Tr1 can be 50%, and the transmittance Tr2 can be 0%. By arranging the limiting structure 200 and the spacer 400 in the same layer and using the same material, the limiting structure 200 and the spacer 400 can be made by one-step patterning process to save process steps. Of course, the embodiments of the present disclosure are not limited to this, and the limiting structure 200 can also be made of the same material as the pixel limiting part 320, such as an integrated structure with the pixel limiting part 320.

[0115] FIG. 7 is a schematic diagram of a partial planar structure of a display substrate provided by another example according to an embodiment of the present disclosure. FIG. 8 is a schematic diagram of a planar structure of a pixel unit shown in FIG. 7. The display substrate shown in FIG. 7 and FIG. 8 is different from the display substrate shown in FIG. 3 and FIG. 5 in that the distance between the first limiting structure 210 and the first color sub-pixel 101.

[0116] In some examples, as shown in FIG. 7 and FIG. 8, the first limiting structure 210 is located between the first color sub-pixel 101 and the second color sub-pixel 102, and the first distance b” between the first limiting structure 210 and the light emitting area 10 of the second color sub-pixel 102 is less than the second distance b’ between the first limiting structure 210 and the light emitting area 10 of the first color sub-pixel 101. The data writing voltage of different color sub-pixels 100 has a difference, which causes the blue sub-pixel and the green sub-pixel to be susceptible to the current leakage of the red sub-pixel when displaying a low gray scale, such as red sub-pixel crosstalk to blue sub-pixel or green sub-pixel. Therefore, the display substrate provided by the present example can reduce the channel ratio of the light emitting functional layer 130 around the light emitting area 10 of the red sub-pixel by arranging the first limiting structure 210 closer to the red sub-pixel, and improve the crosstalk effect.

[0117] In some examples, as shown in FIGS. 7 and 8, the second distance b' is not less than 1 micron than the first distance b". For example, the second distance b' is not less than 1.2 microns, or 1.5 microns, etc. than the first distance b", which is not exhaustively listed herein.

[0118] For example, the size relationship of a, c, d, e, and d and e shown in FIGS. 7 and 8 can be the same as the related parameters shown in FIG. 5, which is not described herein again. For example, the distance b' between the first limiting structure 210 and the light-emitting area 10 of the blue sub-pixel is at least 1 micron larger than the distance b" between the first limiting structure 210 and the light-emitting area 10 of the red sub-pixel or the green sub-pixel.

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

[0120] In some examples, as shown in FIGS. 7 and 8, the third distance b3 between the second limiting structure 220 and the light-emitting area 10 of the second color sub-pixel 102 is less than the fourth distance b4 between the second limiting structure 220 and the light-emitting area 10 of the third color sub-pixel 103. For example, the second limiting structure 220 is closer to the second color sub-pixel 102. Thus, the display substrate provided by the present example can reduce the channel ratio of the light-emitting functional layer 130 around the light-emitting area 10 of the red sub-pixel by setting the first limiting structure 210 to be closer to the second color sub-pixel 102, such as the red sub-pixel, and improve the crosstalk effect.

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

[0122] The display substrate provided in the present example has the same features and relative positional relationship of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 as those of the display substrate shown in FIGS. 3 and 5, and thus will not be described again. The pixel defining pattern 300, the spacers 400, the substrate 01, and other film layers between the first electrode 110 and the substrate 01 in the display substrate shown in the present example can have the same features as those of the corresponding structures in the display substrate shown in FIGS. 3 to 6, and thus will not be described again. The display substrate shown in the present example has the same features of the cross-sectional shape of the defining structure 200 as those of the display substrate shown in FIGS. 3 to 6, and thus will not be described again.

[0123] FIG. 9 is a schematic diagram of a partial planar structure of a display substrate provided in another example according to an embodiment of the present disclosure. FIG. 10 is a schematic diagram of a planar structure of one pixel unit shown in FIG. 9. The display substrate shown in FIGS. 9 and 10 is different from the display substrate shown in FIGS. 7 and 8 in that at least one first defining structure 210 includes two sub-defining structures 2000 arranged at intervals along the first direction.

[0124] For example, as shown in FIGS. 9 and 10, the first defining structure 210 arranged on the same side of and corresponding to the same first color sub-pixel 101 includes two sub-defining structures 2000 arranged at intervals along the first direction, and the distance between the two defining end points 211 away from each other of the two sub-defining structures 2000 is greater than the length of the first edge 11. For example, the sum of the length of the two sub-defining structures 2000 and the interval between the two sub-defining structures 2000 is the total length of the first defining structure 210, and the total length of the first defining structure 210 is greater than the length of the first edge 11. For example, the sum of the length of the two sub-defining structures 2000 is greater than the length of the first edge 11.

[0125] The display substrate provided in the present example can improve the continuity of the second electrode, prevent the increase of the cross voltage, and improve the display uniformity by arranging the first defining structure as two sub-defining structures arranged at intervals, while cutting off at least one layer of the light-emitting functional layer between the second color sub-pixel and the first color sub-pixel and at least one layer of the light-emitting functional layer between the third color sub-pixel and the first color sub-pixel.

[0126] In some examples, as shown in FIGS. 9 and 10, a straight line extending along the second direction passes through the interval between the orthographic projections of the two sub-limiting structures 2000 on the substrate 01 and the interval between the orthographic projections of the light emitting areas 10 of the second color sub-pixel 102 and the third color sub-pixel 103 on the substrate 01. By orthographically opposing the interval between the two sub-limiting structures 2000 and the interval between the second color sub-pixel 102 and the third color sub-pixel 103, the continuity of the second electrode 120 is further improved to improve display uniformity.

[0127] For example, a and e shown in FIG. 10 can be the same as the related parameters shown in FIG. 5, which will not be described here. For example, the length of one of the two sub-limiting structures 2000 in the first direction is d', and the length of the other of the two sub-limiting structures 2000 in the first direction is d", d' + d" > e. For example, the lengths of the two sub-limiting structures 2000 can be the same or different.

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

[0129] For example, as shown in FIGS. 9 and 10, only one of the straight lines extending along the second direction and passing through the two second limiting structures 220 on both sides of the second color sub-pixel 102 passes through the first sub-limiting structure 2001. By setting the distance between the first sub-limiting structure 2001, the two second limiting structures 220 and the light emitting area 10 of the second color sub-pixel 102, the proportion of the channel of the light emitting functional layer 130 around the light emitting area 10 of the second color sub-pixel 102, such as the red sub-pixel, can be reduced, and the crosstalk effect can be improved.

[0130] The display substrate provided in the present example has the same features and relative positional relationship of the first color sub-pixel 101, the second color sub-pixel 102 and the third color sub-pixel 103 as those of the display substrate shown in FIGS. 3 and 5 and FIGS. 7 and 8, and thus will not be described herein. The pixel defining pattern 300, the spacers 400, the substrate 01 and other film layers between the first electrode 110 and the substrate 01 in the display substrate shown in the present example can have the same features as those of the corresponding structures in the display substrate shown in FIGS. 3 to 6, and thus will not be described herein. The display substrate shown in the present example has the same features of the cross-sectional shape of the defining structure 200 as those of the display substrate shown in FIGS. 3 to 6, and thus will not be described herein. The display substrate shown in the present example schematically shows the distance relationship between the second defining structure 220 and the light emitting area 10 of the sub-pixel of different colors, which can be the same as the corresponding distance relationship in the display substrate shown in FIGS. 7 and 8, but is not limited thereto. The distance relationship between the second defining structure 220 and the light emitting area 10 of the sub-pixel of different colors in the present example can also be the same as the corresponding distance relationship in the display substrate shown in FIGS. 3 to 6, and thus will not be described herein.

[0131] FIG. 11 is a schematic diagram of a partial planar structure of a display substrate provided in another example according to an embodiment of the present disclosure. FIG. 12 is a schematic diagram of a planar structure of one pixel unit shown in FIG. 11. The display substrate shown in FIGS. 11 and 12 is different from the display substrate shown in FIGS. 7 and 8 in that the relative positional relationship and length of the first defining structure 210 and the light emitting area 10 of the first color sub-pixel 101 are different.

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

[0133] The display substrate provided by the present example can effectively reduce the crosstalk between the first color sub-pixel and the second color sub-pixel while improving the continuity of the second electrode of the first color sub-pixel and the third color sub-pixel, and improving display uniformity, by limiting the positional relationship between the two limiting end points of the first limiting structure and the two edge end points of the first edge of the first color sub-pixel.

[0134] For example, a and e shown in FIG. 12 can be the same as the related parameters shown in FIG. 5, which will not be described again here. For example, the length f of the first limiting structure 210 and the length e of the first edge 11 satisfy f>e, achieving effective isolation of at least one layer of the light emitting functional layer 130 around the second color sub-pixel 102, such as a red sub-pixel, to improve the crosstalk effect of good display.

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

[0136] The display substrate provided by the present example has the same features and relative positional relationship of the first color sub-pixel 101, the second color sub-pixel 102 and the third color sub-pixel 103 as those of the display substrate shown in FIG. 3 and FIG. 5 and FIG. 7 and FIG. 8, which will not be repeated here. The pixel defining pattern 300, the spacer 400, the substrate 01 and other film layers between the first electrode 110 and the substrate 01 in the display substrate shown in the present example can have the same features as the corresponding structures in the display substrate shown in FIG. 3 to FIG. 6, which will not be repeated here. The display substrate shown in the present example has the same cross-sectional features of the limiting structure as those of the display substrate shown in FIG. 3 to FIG. 6, which will not be repeated here. The display substrate shown in the present example schematically shows the distance relationship between the second limiting structure 220 and the light emitting regions 10 of different color sub-pixels, which can be the same as the corresponding distance relationship in the display substrate shown in FIG. 7 and FIG. 8, but is not limited thereto. The distance relationship between the second limiting structure 220 and the light emitting regions 10 of different color sub-pixels in the present example can also be the same as the corresponding distance relationship in the display substrate shown in FIG. 3 to FIG. 6, which will not be repeated here.

[0137] FIG. 13 is a schematic view of a partial planar structure of a display substrate provided according to another example of the present disclosure. FIG. 14 is a schematic view of a planar structure of one pixel unit shown in FIG. 13. The display substrate shown in FIGS. 13 and 14 is different from the display substrate shown in FIGS. 9 and 10 in that the relative positional relationship of the first limiting structure 210 to the light-emitting areas 10 of the first color sub-pixel 101, the second color sub-pixel 102, and the third color sub-pixel 103 is different.

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

[0139] For example, as shown in FIGS. 13 and 14, the first limiting structure 210 includes a first sub-limiting structure 2001 corresponding to the second color sub-pixel 102 and a second sub-limiting structure 2002 corresponding to the third color sub-pixel 103, and the length of the first sub-limiting structure 2001 is greater than the length of the second sub-limiting structure 2002. For example, the length of the first sub-limiting structure 2001, the second sub-limiting structure 2002, and the interval therebetween in the first direction is greater than the length of the first edge 11 of the light-emitting area 10 of the first color sub-pixel 101. For example, one limiting end point 211 of the first sub-limiting structure 2001 away from the second sub-limiting structure 2002 protrudes relative to one edge end point 111 of the first edge 11, and one limiting end point 211 of the second sub-limiting structure 2002 away from the first sub-limiting structure 2001 protrudes relative to the other edge end point 111 of the first edge 11.

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

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

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

[0143] For example, as shown in FIG. 14, a and e can be the same as the related parameters shown in FIG. 5, which will not be repeated here. For example, the length of the first sub-limiting structure 2001 is g1, and the length of the second sub-limiting structure 2002 is g2, g1+g2>e, so as to effectively block at least one layer of the light emitting functional layer 130 around the second color sub-pixel 102, such as the red sub-pixel, and improve the display crosstalk effect.

[0144] The display substrate provided in the present example has the same characteristics and relative positional relationship of the first color sub-pixel 101, the second color sub-pixel 102 and the third color sub-pixel 103 as those of the first color sub-pixel 101, the second color sub-pixel 102 and the third color sub-pixel 103 in the display substrate shown in FIG. 3 and FIG. 5 and FIG. 7 and FIG. 8, which will not be repeated here. The pixel limiting pattern 300, the spacer 400, the substrate 01 and other film layers between the first electrode 110 and the substrate 01 in the display substrate shown in the present example can have the same characteristics as the corresponding structures in the display substrate shown in FIG. 3 to FIG. 6, which will not be repeated here. The cross-sectional shape and other characteristics of the limiting structure 200 in the display substrate shown in the present example are the same as the cross-sectional characteristics of the limiting structure 200 in the display substrate shown in FIG. 3 to FIG. 6, which will not be repeated here. The display substrate shown in the present example schematically shows the distance relationship between the second limiting structure 220 and the light emitting area 10 of the sub-pixel of different colors, which can be the same as the corresponding distance relationship in the display substrate shown in FIG. 7 and FIG. 8, but is not limited thereto. The distance relationship between the second limiting structure 220 and the light emitting area 10 of the sub-pixel of different colors in the present example can also be the same as the corresponding distance relationship in the display substrate shown in FIG. 3 to FIG. 6, which will not be repeated here.

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

[0146] FIGS. 15A and 15B are schematic diagrams of planar structures of a pixel unit according to different examples of embodiments of the present disclosure. The pixel units shown in FIGS. 15A and 15B differ from the pixel unit shown in FIG. 9 in that, in a direction perpendicular to the substrate, the first defining structure 210 does not overlap the first electrode 110 of each sub-pixel.

[0147] For example, as shown in FIGS. 15A and 15B, in a direction perpendicular to the substrate, the first defining structure 211 does not overlap the first electrode 110 of the second color sub-pixel 102 and the third color sub-pixel 103, so as to avoid the anode via hole, and prevent the recess at the position of the anode via hole from causing the first defining structure to deform.

[0148] For example, as shown in FIG. 15A, the first defining structure 211 between the second color sub-pixel 102 and the first color sub-pixel 101 in the same pixel unit can include a plurality of sub-defining structures 2000, such as two sub-defining structures 2000 arranged along the first direction. For example, the first defining structure 211 between the third color sub-pixel 103 and the first color sub-pixel 101 in the same pixel unit can include a plurality of sub-defining structures 2000, such as two sub-defining structures 2000 arranged along the first direction, and four sub-defining structures 2000 can be arranged between a first color sub-pixel 101 and other color sub-pixels. For example, the side of the second color sub-pixel 102 away from the first color sub-pixel 101 in the same pixel unit can be provided with only one sub-defining structure 2000. For example, the side of the third color sub-pixel 103 away from the first color sub-pixel 101 in the same pixel unit can be provided with only one sub-defining structure 2000.

[0149] For example, as shown in FIG. 15B, among the plurality of sub-defining structures 2000 between the first color sub-pixel 101 and the second color sub-pixel 102 in the same pixel unit, at least one sub-defining structure 2000 is close to the first color sub-pixel 101, and at least one sub-defining structure 2000 is close to the second color sub-pixel 102. For example, among the plurality of sub-defining structures 2000 between the first color sub-pixel 101 and the third color sub-pixel 103, at least one sub-defining structure 2000 is close to the first color sub-pixel 101, and at least one sub-defining structure 2000 is close to the third color sub-pixel 103. By arranging the positions of different sub-defining structures, the continuity of the second electrode around the light-emitting area of different color sub-pixels can be adjusted.

[0150] The distance between the two defining endpoints of the first defining structure shown in FIG. 15B can be DO.

[0151] Other structures in the display substrate shown in FIGS. 15A and 15B can have the same features as the other structures in the display substrate shown in FIG. 9, and will not be described again here.

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

[0153] The display substrate shown in FIG. 16 differs from the display substrates shown in FIGS. 3 to 14 in that the pixel arrangement structure is different, the shapes of the light emitting regions 10 of the sub-pixels 100 of each color are different, and the planar shapes and lengths of the limiting structures 200 are different.

[0154] In some examples, as shown in FIGS. 16 and 17, the plurality of sub-pixels 100 includes a plurality of second color sub-pixels 102 and a plurality of third color sub-pixels 103, the plurality of sub-pixels 100 is arranged as a plurality of first sub-pixel groups 011 and a plurality of second sub-pixel groups 012 arranged alternately along a third direction, each first sub-pixel group 011 includes a first color sub-pixel 101 and a second color sub-pixel 102 arranged alternately along a fourth direction, each second sub-pixel group 012 includes a third color sub-pixel 103 arranged along the fourth direction, the third direction intersects the fourth direction and both the third direction and the fourth direction intersect the first direction. For example, the plurality of sub-pixels can be arranged as a blue diamond pixel arrangement.

[0155] The third direction described above can be the direction opposite to the direction indicated by the arrow of the W direction shown in the figure, and the fourth direction can be the direction opposite to the direction indicated by the arrow of the V direction shown in the figure. For example, the third direction and the fourth direction both intersect the second direction. For example, the third direction and the fourth direction can be perpendicular. For example, the third direction and the fourth direction can be interchangeable, and embodiments of the present disclosure do not limit this. The light emitting colors of the sub-pixels in the first color sub-pixels 101, the second color sub-pixels 102, and the third color sub-pixels 103 in the present example can be the same as those in the above-described examples, and will not be described again here.

[0156] For example, as shown in FIGS. 16 and 17, the shape of the light emitting region 10 of the first color sub-pixel 101 can be a shape having four corner portions, the shapes of the four corner portions can all be arc shapes, and the curvature of one of the four corner portions is greater than the curvatures of the other three corner portions. For example, the shapes of the light emitting regions 10 of the second color sub-pixels 102 and the third color sub-pixels 103 can both be quadrilaterals, such as quadrilaterals with rounded corners.

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

[0158] In some examples, as shown in FIGS. 16 and 17, the first defining structure 210 is located between the first color sub-pixel 101 and the third color sub-pixel 103, and the distance between the first defining structure 210 and the light emitting area 10 of the first color sub-pixel 101 is greater than the distance between the first defining structure 210 and the light emitting area 10 of the third color sub-pixel 103. For example, the first defining structure 210 is closer to the light emitting area 10 of the third color sub-pixel 103. In this way, the defining structure 200 can be distributed between different color sub-pixels 100 in different pixel arrangement structures, such as being arranged close to a red sub-pixel or a green sub-pixel that is prone to causing crosstalk, to block at least one layer of the light emitting functional layer 130 of different color sub-pixels 100, thereby reducing crosstalk.

[0159] For example, as shown in FIG. 17, the distance (such as the PDL gap) between the light emitting areas 10 of adjacent sub-pixels 100 is a, the distance between the first defining structure 210 and the light emitting area 10 of the first color sub-pixel 101 is b, the length of the edge of the first defining structure 210 close to the side of the substrate 01 in the cross section perpendicular to the first direction is c, the distance between the first defining structure 210 and the light emitting area 10 of the third color sub-pixel 103 is b', and b > b'. The cross-sectional shape and size characteristics of the defining structure 200 in this example can be the same as those of the defining structure 200 in the above examples, and will not be described here again.

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

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

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

[0163] For example, as shown in FIGS. 16 and 17, the second limiting structure 220 surrounds the light emitting area 10 of the second color sub-pixel 102. For example, the first limiting structure 210 surrounds the light emitting area 10 of the first color sub-pixel 101.

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

[0165] The film layer between the substrate 01 and the first electrode 110 of the sub-pixel 100 in the display substrate provided in the present example can have the same features as the corresponding structure in any of the above examples, and will not be described herein. The layer relationship and material features of the spacer 400 and the limiting structure 200 in the display substrate provided in the present example can have the same features as the corresponding structure in any of the above examples, and will not be described herein. The planar shape of the spacer 400 is schematically shown as a circle in the figure, but is not limited thereto. The planar shape of the spacer 400 can also be a quadrilateral or other shape.

[0166] The pixel arrangement structure of the display substrate shown in FIG. 18 is the same as that of the display substrate shown in FIG. 16, such as including a first sub-pixel group 011 and a second sub-pixel group 012. The display substrate shown in FIG. 18 is different from the display substrate shown in FIG. 16 in the shape of the light emitting area 10 of the sub-pixel 100, the shape of the first electrode 110 of the sub-pixel 100, and the planar shape of the limiting structure 200. For example, the planar shape of the limiting structure 200 can be a circular arc shape or other non-linear special shape.

[0167] As shown in FIG. 18, the first limiting structure 210 has a curved shape, and the total length of the first limiting structure 210 is greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in at least one direction. For example, the total length of the first limiting structure 210 is greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in the first direction, or greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in the second direction, or greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in the third direction, or greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in the fourth direction, or greater than the size of the light-emitting area 10 of the first color sub-pixel 101 in other directions. By setting the shape of the first limiting structure 210 and the relationship between the total length and the size of the light-emitting area 10 of the first color sub-pixel 101, the shape of the first limiting structure 210 can be matched with the shape of the light-emitting area 10 of the sub-pixel, while reducing the low gray scale crosstalk problem caused by the leakage current between the first color sub-pixel 101 and other color sub-pixels 100, and reducing the possibility of peeling of the first limiting structure 210.

[0168] In some examples, as shown in FIG. 18, the edge of the light-emitting area 10 of the third color sub-pixel 103 has a curved shape, and the first limiting structure 210 is curved towards the light-emitting area 10 of the third color sub-pixel 103. For example, the first limiting structure 210 is curved away from the light-emitting area 10 of the first color sub-pixel 101. By curving the first limiting structure 210 towards the light-emitting area 10 of the third color sub-pixel 103, the first limiting structure 210 can be closer to the light-emitting area 10 of the third color sub-pixel 103, reducing the crosstalk of the third color sub-pixel 103 to the first color sub-pixel 101.

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

[0170] For example, as shown in FIG. 18, the light-emitting area 10 of the same third color sub-pixel 103 is surrounded by two curved first limiting structures 210, and the first limiting structure 210 is closer to the light-emitting area 10 of the third color sub-pixel 103. Of course, the embodiments of the present disclosure are not limited to that the light-emitting area 10 of the third color sub-pixel 103 is surrounded by two first limiting structures 210, but can also be surrounded by one or more first limiting structures 210.

[0171] In some examples, as shown in FIG. 18, the plurality of limiting structures 200 further includes a plurality of second limiting structures 220, which are located at least between the adjacent second color sub-pixel 102 and the third color sub-pixel 103, and the distance between the second limiting structure 220 and the light emitting area 10 of the second color sub-pixel 102 is less than the distance between the second limiting structure 220 and the light emitting area 10 of the third color sub-pixel 103.

[0172] For example, as shown in FIG. 18, the second limiting structure 220 has a curved shape, and the second limiting structure 220 is curved towards the light emitting area 10 of the second color sub-pixel 102. For example, the second limiting structure 220 is curved away from the light emitting area 10 of the third color sub-pixel 103. By curving the second limiting structure 220 towards the light emitting area 10 of the second color sub-pixel 102, the second limiting structure 220 can be closer to the light emitting area 10 of the second color sub-pixel 102, and the crosstalk of the second color sub-pixel 102 to the first color sub-pixel 101 and the third color sub-pixel 103 can be reduced.

[0173] For example, as shown in FIG. 18, the light emitting area 10 of the same second color sub-pixel 102 is surrounded by two curved second limiting structures 220, and the second limiting structure 220 is closer to the light emitting area 10 of the second color sub-pixel 102. Of course, the embodiments of the present disclosure are not limited to that the light emitting area 10 of the second color sub-pixel 102 is surrounded by two second limiting structures 220, but can also be surrounded by one or more second limiting structures 220.

[0174] FIG. 18 schematically shows that the first limiting structure 210 and the second limiting structure 220 located between the adjacent sub-pixels are continuous structures, but are not limited thereto. At least one first limiting structure 210 and at least one second limiting structure 220 can include a plurality of sub-limiting structures arranged at intervals.

[0175] The film layer between the substrate 01 and the first electrode 110 of the sub-pixel in the display substrate provided by the present example can have the same features as the corresponding structures in any of the above examples, and will not be described here. The layer relationship and material features of the limiting structure in the display substrate provided by the present example can have the same features as the corresponding structures in any of the above examples, and will not be described here. The planar shape of the spacer 400 is schematically shown as a circle in the figure, but is not limited thereto. The planar shape of the spacer 400 can also be a quadrilateral or other shape. The color film can be arranged on the packaging layer of the display substrate provided by the present example, such as the COE product.

[0176] The display substrate provided by the present disclosure improves the crosstalk display defect caused by the material in the light-emitting functional layer by setting the relative position relationship, relative distance and relative size of the limiting structure and the light-emitting region of different color sub-pixels, thereby solving the low gray scale crosstalk problem caused by the leakage current between red, green and blue sub-pixels in the Tandem technology.

[0177] The display substrate provided by the present disclosure can be applied to a folding display panel, and lays a technical feasibility for strengthening the flexibility of the display panel and preventing the display panel from peeling.

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

[0179] FIG. 19 is a schematic block diagram of a display device provided by another embodiment of the present disclosure. As shown in FIG. 19, the display device provided by the embodiment of the present disclosure includes any of the display substrates described above.

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

[0181] For example, the display device can be a display device such as an organic light-emitting diode display device, and any product or component having a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, a navigator, etc., which includes the display device, and the embodiment is not limited thereto.

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

[0183] For example, the display device can be applied to a mobile phone, a vehicle-mounted product and a folding product.

[0184] The following points need to be explained:

[0185] (1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can be referred to the general design.

[0186] (2) The features in the same embodiment and different embodiments of the present disclosure can be combined with each other without conflict.

[0187] The above description is only exemplary embodiments of the present disclosure, and is not used to limit the protection scope of the present disclosure, and the protection scope of the present disclosure is determined by the appended claims.

Claims

1. A display substrate, comprising: a substrate; a plurality of sub-pixels on the substrate, each of at least some of the sub-pixels comprising a light-emitting functional layer comprising a plurality of film layers; a plurality of defining structures between at least two adjacent sub-pixels of different colors and configured to separate at least one layer of the light-emitting functional layer, wherein the plurality of sub-pixels comprises a plurality of first color sub-pixels, and a defining structure immediately adjacent to at least one first color sub-pixel among the plurality of defining structures is a first defining structure; at least part of the first defining structure extends in a first direction, a light-emitting area of the first color sub-pixel comprises a first edge extending in the first direction, the first defining structure comprises two defining end points, at least one of the defining end points protrudes relative to an edge end point of the first edge immediately adjacent to the at least one defining end point in the first direction, or the first defining structure has a curved shape, and a total length of the part of the first defining structure extending in the first direction is greater than a size of the light-emitting area of the first color sub-pixel in at least one direction. 2.The display substrate of claim 1, wherein, a distance between the two defining end points of the first defining structure is greater than a length of the first edge. 3.The display substrate according to claim 1 or 2, wherein, a total length of the part of the first defining structure extending in the first direction is greater than a length of the first edge. 4.The display substrate of any one of claims 1-3, wherein, a shape of a cross section of the defining structure cut by a plane perpendicular to a direction in which the defining structure extends comprises an inverted trapezoid, a bottom angle between a waist of the inverted trapezoid and a bottom edge away from the substrate is 50-80 degrees, a length of the bottom edge on a side of the inverted trapezoid close to the substrate is 1-6 microns, and a thickness of the defining structure is 0.8-1.8 microns. 5.The display substrate of any one of claims 1-4, wherein, a projection of the first edge on the substrate is a first projection, a projection of the first defining structure on the substrate is a second projection, and a projection of the first projection on a straight line extending in the first direction is completely located within a projection of the second projection on the straight line. 6.The display substrate of claim 1, wherein, the light-emitting area of the first color sub-pixel further comprises a second edge extending in a second direction, and the second direction intersects the first direction; a distance between a projection of one of the two defining end points on the substrate on a straight line extending in the second direction and a projection of the second edge on the substrate on the straight line is less than 0.5 microns. the plurality of sub-pixels comprises a plurality of pixel units arranged in an array in the first direction and the second direction; 7.The display substrate of any one of claims 1-5, wherein, each pixel unit comprises one first color sub-pixel, one second color sub-pixel, and one third color sub-pixel, the one first color sub-pixel and the one second color sub-pixel are arranged in the second direction, and the one second color sub-pixel and the one third color sub-pixel are arranged in the first direction; the same first color sub-pixel is provided with the first defining structure immediately adjacent thereto on at least one side of the first color sub-pixel in the second direction. the first color sub-pixel is a blue sub-pixel, one of the second color sub-pixel and the third color sub-pixel is a red sub-pixel, and the other is a green sub-pixel. 8.The display substrate of claim 7, wherein, ​ 9.The display substrate according to claim 7 or 8, wherein The first defining structure is located between the first color sub-pixel and the second color sub-pixel, and a first distance between the first defining structure and a light emitting area of the second color sub-pixel is smaller than a second distance between the first defining structure and a light emitting area of the first color sub-pixel. 10.The display substrate of claim 9, wherein, A difference between the second distance and the first distance is not less than 1 micron. 11.The display substrate according to claim 7 or 8, wherein The first defining structure is located between the first color sub-pixel and the second color sub-pixel, and a ratio of a distance between the first defining structure and a light emitting area of the second color sub-pixel to a distance between the first defining structure and a light emitting area of the first color sub-pixel is 0.9-1.

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

13. The display substrate according to any one of claims 7-11, wherein, The at least one first defining structure comprises two sub-defining structures arranged at intervals along the first direction, and an interval between the projections on the substrate substrate of a straight line extending along the second direction and passing through the projections on the substrate substrate of the two sub-defining structures and a projection on the substrate substrate of the light emitting area of the third color sub-pixel. 14.The display substrate of any one of claims 7-13, wherein, The plurality of defining structures further comprises a plurality of second defining structures, at least located between the adjacent second color sub-pixel and the third color sub-pixel. 15.The display substrate of claim 14, wherein, A third distance between the second defining structure and the light emitting area of the second color sub-pixel is smaller than a fourth distance between the second defining structure and the light emitting area of the third color sub-pixel. 16.The display substrate of claim 14, wherein, A ratio of a distance between the second defining structure and the light emitting area of the second color sub-pixel to a distance between the second defining structure and the light emitting area of the third color sub-pixel is 0.9-1.

1.

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

18. The display substrate according to any one of claims 1-5, wherein, The plurality of sub-pixels comprises a plurality of second color sub-pixels and a plurality of third color sub-pixels, the plurality of sub-pixels being arranged into a plurality of first sub-pixel groups and a plurality of second sub-pixel groups arranged alternately along a third direction, each first sub-pixel group comprising the first color sub-pixel and the second color sub-pixel arranged alternately along a fourth direction, and each second sub-pixel group comprising the third color sub-pixel arranged along the fourth direction, the third direction intersecting the fourth direction and both the third direction and the fourth direction intersecting the first direction; The first defined structure is located between the first color sub-pixel and the third color sub-pixel, and a distance between the first defined structure and a light emitting area of the first color sub-pixel is greater than a distance between the first defined structure and a light emitting area of the third color sub-pixel.

19. The display substrate of claim 18, wherein, An edge of the third color sub-pixel adjacent to the first defined structure extends along the first direction. 20.The display substrate of claim 18, wherein, An edge of the light emitting area of the third color sub-pixel has a curved shape, and the first defined structure is curved towards the light emitting area of the third color sub-pixel.

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

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

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