Display substrate and display apparatus

Abstract

A display substrate and a display apparatus. The display substrate comprises sub-pixels, a pixel defining pattern and a defining structure. The sub-pixels each comprise a light-emitting functional layer. The pixel defining pattern comprises first openings and second openings. The part of at least one layer of the light-emitting functional layers in the first openings is continuous and at least part thereof in the second openings is partitioned. The part of the defining structure exposed by the second openings partitions the light-emitting functional layers. The sub-pixels comprise first sub-pixels and second sub-pixels, the turn-on voltage of the first sub-pixels being higher than that of the second sub-pixels. The defining structure comprises a first defining structure surrounding light-emitting regions of the first sub-pixels and a second defining structure surrounding light-emitting regions of the second sub-pixels, the first defining structure being not exposed by the second openings, or the proportion of the part of the first defining structure exposed by the second openings being smaller than the proportion of the part of the second defining structure exposed by the second openings. Thus, configuring the position relationship between the first defining structure and the second openings helps to avoid excessively high power consumption while reducing crosstalk.

Description

Display substrate and display device Technical Field

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

[0002] Organic light-emitting diode (OLED) display products offer advantages such as rich colors, fast response times, and foldability. With the advancement of display technology, users have increasingly demanded higher lifespans and power consumption of display devices. A tandem organic light-emitting display device, by adding at least one light-emitting layer and a charge-generating layer to the organic light-emitting device, improves the lifespan and brightness of the light-emitting device and reduces power consumption, meeting user demands for both lifespans and power consumption.

[0003] Summary of the Invention

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

[0005] At least one embodiment of the present disclosure provides a display substrate, comprising: a base substrate, and a plurality of sub-pixels, a pixel-defining pattern, and a defining structure located on the base substrate. The base substrate includes at least a first region; a plurality of sub-pixels located in the first region, each of at least some of the sub-pixels including a light-emitting functional layer, the light-emitting functional layer including a plurality of film layers; a pixel-defining pattern including a plurality of first openings to define a light-emitting region of at least some of the sub-pixels; and a defining structure located between the light-emitting functional layer and the base substrate, the defining structure including a portion surrounding the light-emitting region of each of the at least some of the sub-pixels. The pixel defining pattern also includes a second opening, and the portion of at least one layer of the light-emitting functional layer located in the first opening is a continuous portion, and at least the portion located in at least one second opening is isolated, and the portion of the defining structure exposed by the second opening is configured to isolate the at least one layer of the light-emitting functional layer; the multiple sub-pixels include a first sub-pixel and a second sub-pixel, the turn-on voltage of the first sub-pixel is higher than the turn-on voltage of the second sub-pixel, the defining structure includes a first defining structure and a second defining structure, the first defining structure includes at least a portion of the light-emitting area surrounding the first sub-pixel, and the second defining structure includes at least a portion of the light-emitting area surrounding the second sub-pixel, the first defining structure is not exposed by the second opening, or the ratio of the edge length of the portion of the first defining structure exposed by the second opening to the perimeter of the first opening corresponding to the first sub-pixel is smaller than the ratio of the edge length of the portion of the second defining structure exposed by the second opening to the perimeter of the first opening corresponding to the second sub-pixel.

[0006] For example, according to an embodiment of the present disclosure, the turn-on voltage of the first sub-pixel is 0.1 to 5 V higher than the turn-on voltage of the second sub-pixel.

[0007] For example, according to an embodiment of the present disclosure, the portion of the second limiting structure exposed by the second opening is a non-closed ring structure, and the non-closed ring structure accounts for 10% to 80% of the circumference of the first opening corresponding to the second sub-pixel.

[0008] For example, according to an embodiment of the present disclosure, the multiple sub-pixels also include a third sub-pixel, the defining structure also includes a third defining structure, the third defining structure includes a portion of the light-emitting area surrounding the third sub-pixel, the third defining structure is not exposed by the second opening, or the edge length of the portion of the first defining structure exposed by the second opening accounts for a smaller proportion of the perimeter of the first opening corresponding to the first sub-pixel than the edge length of the portion of the third defining structure exposed by the second opening accounts for a smaller proportion of the perimeter of the first opening corresponding to the third sub-pixel.

[0009] For example, according to an embodiment of the present disclosure, the portion of the third limiting structure exposed by the second opening is a non-closed ring structure, and the non-closed ring structure accounts for 10% to 80% of the circumference of the first opening corresponding to the third sub-pixel.

[0010] For example, according to an embodiment of the present disclosure, the first sub-pixel is a blue sub-pixel, one of the second sub-pixel and the third sub-pixel is a red sub-pixel, and the other of the second sub-pixel and the third sub-pixel is a green sub-pixel.

[0011] For example, according to an embodiment of the present disclosure, each sub-pixel in at least some of the sub-pixels also includes a first electrode and a second electrode located on both sides of the light-emitting functional layer along a direction perpendicular to the base substrate, the first electrode is located between the light-emitting functional layer and the base substrate, and the pixel defining pattern is located on the side of the first electrode away from the base substrate; the defining structure is located between the first electrode and the base substrate.

[0012] For example, according to an embodiment of the present disclosure, the pixel defining pattern includes a pixel defining portion surrounding the first opening and the second opening, and in a direction perpendicular to the base substrate, at least a portion of the pixel defining portion does not overlap with the defining structure.

[0013] For example, according to an embodiment of the present disclosure, each sub-pixel in the at least some sub-pixels further includes a first electrode and a second electrode located on both sides of the light-emitting functional layer along a direction perpendicular to the base substrate, the first electrode is located between the light-emitting functional layer and the base substrate, and the pixel defining pattern is located on the side of the first electrode away from the base substrate; the first defining structure is not exposed by the second opening, and the ring width of the annular portion of the first defining structure not covered by the first electrode of the first sub-pixel is smaller than the ring width of the annular portion of the second defining structure not covered by the first electrode of the second sub-pixel.

[0014] For example, according to an embodiment of the present disclosure, each sub-pixel in the at least part of the sub-pixels further includes a first electrode and a second electrode located on both sides of the light-emitting functional layer along a direction perpendicular to the base substrate, the first electrode is located between the light-emitting functional layer and the base substrate, and the pixel defining pattern is located on the side of the first electrode away from the base substrate; the ratio of the edge length of the portion exposed by the second opening in the first defining structure to the circumference of the first opening corresponding to the first sub-pixel is smaller than the ratio of the edge length of the portion exposed by the second opening in the second defining structure to the circumference of the first opening corresponding to the second sub-pixel, the ring width of the annular portion of the first defining structure not covered by the first electrode of the first sub-pixel that does not overlap with the second opening is the first ring width, the ring width of the annular portion that overlaps with the second opening is the second ring width, and the first ring width is smaller than the second ring width.

[0015] For example, according to an embodiment of the present disclosure, each sub-pixel in the at least part of the sub-pixels also includes a first electrode and a second electrode located on both sides of the light-emitting functional layer along a direction perpendicular to the base substrate, the first electrode is located between the light-emitting functional layer and the base substrate, and the pixel defining pattern is located on the side of the first electrode away from the base substrate; the base substrate also includes a second area, the defining structure includes at least one closed annular defining structure surrounding the second area, and the light-emitting functional layer and the second electrode are both disconnected at the edge of the annular defining structure.

[0016] For example, according to an embodiment of the present disclosure, the pixel defining pattern includes a pixel defining portion surrounding the first opening and the second opening, and along a direction perpendicular to the base substrate, at least a portion of the annular defining structure does not overlap with the pixel defining portion.

[0017] For example, according to an embodiment of the present disclosure, the at least one closed ring-shaped defining structure includes multiple ring-shaped defining structures, and the interval between two adjacent ring-shaped defining structures is not less than 1 micron.

[0018] For example, according to an embodiment of the present disclosure, the defining structure includes a first isolation layer and a second isolation layer stacked together, the first isolation layer is located on a side of the second isolation layer away from the base substrate, and an edge of the first isolation layer protrudes relative to an edge of the second isolation layer.

[0019] For example, according to an embodiment of the present disclosure, the material of the first isolation layer is different from the material of the second isolation layer. The material of the first isolation layer includes an inorganic non-metallic material or a metal material, and the material of the second isolation layer includes an organic material or an inorganic non-metallic material.

[0020] For example, according to an embodiment of the present disclosure, the multiple sub-pixels also include a third sub-pixel, and the multiple sub-pixels are arranged as a plurality of first sub-pixel groups and a plurality of second sub-pixel groups alternately arranged along a first direction, each first sub-pixel group includes the first sub-pixels and the second sub-pixels alternately arranged along a second direction, and each second sub-pixel group includes the third sub-pixel arranged along the second direction, and the first direction intersects with the second direction.

[0021] For example, according to an embodiment of the present disclosure, the limiting structure also includes a third limiting structure, the first limiting structure includes a non-closed ring-shaped first isolation portion surrounding the light-emitting area of ​​the first sub-pixel, the second limiting structure includes a non-closed ring-shaped second isolation portion surrounding the light-emitting area of ​​the second sub-pixel, and the third limiting structure includes a non-closed ring-shaped third isolation portion surrounding the light-emitting area of ​​the third sub-pixel; the light-emitting areas of the first sub-pixel, the second sub-pixel and the third sub-pixel are all quadrilaterals, the first isolation portion surrounds two adjacent sides of the light-emitting area of ​​the first sub-pixel and a first corner formed by connecting the two sides, or the first isolation portion surrounds two adjacent sides of the light-emitting area of ​​the first sub-pixel except the first corner formed by connecting the two adjacent sides, the second isolation portion surrounds two adjacent sides of the light-emitting area of ​​the second sub-pixel and a second corner formed by connecting the two sides, and the third isolation portion surrounds two adjacent sides of the light-emitting area of ​​the third sub-pixel and a third corner formed by connecting the two sides, and the orientations of the first corner, the second corner and the third corner are all the same.

[0022] For example, according to an embodiment of the present disclosure, the second limiting structure includes a non-closed ring-shaped second isolation portion surrounding the light-emitting area of ​​the second sub-pixel; the light-emitting areas of the first sub-pixel, the second sub-pixel and the third sub-pixel are all quadrilaterals, and the second isolation portion surrounds the four sides of the light-emitting area of ​​the second sub-pixel.

[0023] For example, according to an embodiment of the present disclosure, the limiting structure also includes a third limiting structure, which includes a non-closed ring-shaped third isolation portion surrounding the light-emitting area of ​​the third sub-pixel, and the third isolation portion surrounds two edges of the light-emitting area of ​​the third sub-pixel that are adjacent to the light-emitting area of ​​the first sub-pixel.

[0024] For example, according to an embodiment of the present disclosure, the second limiting structure includes a non-closed ring-shaped second isolation portion surrounding the light-emitting area of ​​the second sub-pixel, and the limiting structure also includes a third limiting structure, and the third limiting structure includes a non-closed ring-shaped third isolation portion surrounding the light-emitting area of ​​the third sub-pixel; the light-emitting areas of the first sub-pixel, the second sub-pixel and the third sub-pixel are all quadrilaterals, the second isolation portion surrounds two adjacent sides of the light-emitting area of ​​the second sub-pixel and a second corner formed by connecting the two sides, and the third isolation portion surrounds two adjacent sides of the light-emitting area of ​​the third sub-pixel and a third corner formed by connecting the two sides, and the second corner and the third corner have the same orientation.

[0025] For example, according to an embodiment of the present disclosure, at least one film layer of the light-emitting functional layer includes a charge generating layer, and the light-emitting functional layer includes a first light-emitting layer, the charge generating layer and a second light-emitting layer that are stacked, and the charge generating layer is located between the first light-emitting layer and the second light-emitting layer, and the charge generating layer is disconnected at the edge of the defined structure.

[0026] An embodiment of the present disclosure provides a display substrate, comprising: a base substrate, a plurality of sub-pixels located on the base substrate, a pixel-defining pattern, and a defining structure. The base substrate includes at least a first region; a plurality of sub-pixels located in the first region, each of at least some of the sub-pixels including a light-emitting functional layer, the light-emitting functional layer including multiple film layers; the pixel-defining pattern including a plurality of first openings to define light-emitting regions of at least some of the sub-pixels; and a defining structure located between the light-emitting functional layer and the base substrate, the defining structure including a portion surrounding the light-emitting region of each of the at least some of the sub-pixels. The pixel defining pattern further includes a second opening, a portion of at least one layer of the light-emitting functional layer located in the first opening is continuous, and at least a portion located in the at least one second opening is interrupted, and a portion of the defining structure exposed by the second opening is configured to interrupt the at least one layer of the light-emitting functional layer. The plurality of sub-pixels include a first sub-pixel and a second sub-pixel, a turn-on voltage of the first sub-pixel is higher than a turn-on voltage of the second sub-pixel, a first distance is defined between an edge of a light-emitting area of ​​the first sub-pixel and the second opening closest to the edge of the light-emitting area, and a second distance is defined between an edge of an light-emitting area of ​​the second sub-pixel and the second opening immediately adjacent to the edge of the light-emitting area, wherein the first distance is greater than the second distance. Alternatively, the defining structure includes a first defining structure and a second defining structure, the first defining structure at least including a portion surrounding the light-emitting area of ​​the first sub-pixel, and the second defining structure at least including a portion surrounding the light-emitting area of ​​the second sub-pixel, and a ratio of an edge length of a portion of the first defining structure exposed by the second opening to a perimeter of the first opening corresponding to the first sub-pixel is less than a ratio of an edge length of a portion of the second defining structure exposed by the second opening to a perimeter of the first opening corresponding to the second sub-pixel.

[0027] For example, according to an embodiment of the present disclosure, the turn-on voltage of the first sub-pixel is 0.1 to 5 V higher than the turn-on voltage of the second sub-pixel.

[0028] For example, according to an embodiment of the present disclosure, the multiple sub-pixels also include a third sub-pixel, a second opening is provided between the first sub-pixel and the third sub-pixel, the distance between the edge of the light-emitting area of ​​the first sub-pixel and the second opening is a third distance, the distance between the edge of the light-emitting area of ​​the third sub-pixel and the second opening is a fourth distance, and the third distance is greater than the fourth distance; or, the limiting structure also includes a third limiting structure, the third limiting structure includes a portion surrounding the light-emitting area of ​​the third sub-pixel, and the ratio of the edge length of the portion of the first limiting structure exposed by the second opening to the circumference of the first opening corresponding to the first sub-pixel is less than the ratio of the edge length of the portion of the third limiting structure exposed by the second opening to the circumference of the first opening corresponding to the third sub-pixel.

[0029] For example, according to an embodiment of the present disclosure, the portion of the second limiting structure exposed by the second opening is a non-closed ring structure, and the non-closed ring structure accounts for 10% to 80% of the circumference of the first opening corresponding to the second sub-pixel.

[0030] For example, according to an embodiment of the present disclosure, the portion of the third limiting structure exposed by the second opening is a non-closed ring structure, and the non-closed ring structure accounts for 10% to 80% of the circumference of the first opening corresponding to the third sub-pixel.

[0031] For example, according to an embodiment of the present disclosure, each sub-pixel in the at least part of the sub-pixels also includes a first electrode and a second electrode located on both sides of the light-emitting functional layer along a direction perpendicular to the base substrate, the first electrode is located between the light-emitting functional layer and the base substrate, and the pixel defining pattern is located on the side of the first electrode away from the base substrate; the base substrate also includes a second area, the defining structure includes at least one closed annular defining structure surrounding the second area, and the light-emitting functional layer and the second electrode are both disconnected at the edge of the annular defining structure.

[0032] An embodiment of the present disclosure provides a display device, comprising the display substrate in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, rather than limiting the present disclosure.

[0034] FIG. 1 is a plan view of a display substrate provided according to an example of an embodiment of the present disclosure.

[0035] FIG. 2 is a structural diagram of the A11 region of the display substrate shown in FIG. 1 in one example.

[0036] FIG3 is a schematic diagram of a partial cross-section structure taken along line AA′ shown in FIG2 .

[0037] 4 to 7 are structural diagrams of the A11 region of the display substrate shown in FIG. 1 in different examples.

[0038] FIG8 is a schematic diagram of a partial planar structure of the limiting structure in the display substrate shown in FIG2 and FIG4 to FIG7.

[0039] 9 and 10 are schematic diagrams of partial planar structures of display substrates according to other examples of the embodiment of the present disclosure.

[0040] 11 and 12 are schematic diagrams of partial cross-sectional structures of a defining structure and an insulating layer in different examples according to an embodiment of the present disclosure.

[0041] FIG13 is a schematic diagram of a partial cross-sectional structure taken along line EE′ shown in FIG1 .

[0042] FIG14A is a partial plan view of a display substrate provided according to another example of the present disclosure.

[0043] FIG14B is a schematic diagram of a partial cross-sectional structure taken along line DD′ shown in FIG14A .

[0044] 15 to 17 are partial plan views of the defining structures shown in other examples according to the embodiment of the present disclosure.

[0045] FIG18 is a schematic diagram of a partial planar structure of a display substrate provided according to another example of an embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0047] Unless otherwise defined, technical or scientific terms used in this disclosure should have the ordinary meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are simply used to distinguish different components. The words "include" or "comprising" and similar terms mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0048] The features such as “parallel”, “perpendicular” and “same” used in the embodiments of the present disclosure include the features such as “parallel”, “perpendicular” and “same” in the strict sense, as well as the cases where “approximately parallel”, “approximately perpendicular” and “approximately the same” contain certain errors, taking into account the errors associated with the measurement and the measurement of specific quantities (for example, the limitations of the measurement system), and are expressed as being within the acceptable deviation range for a specific value determined by a person of ordinary skill in the art. For example, “approximately” can mean within one or more standard deviations, or within 10% or 5% of the value. When the number of a component is not specifically indicated below in the embodiments of the present disclosure, it means that the component can be one or more, or can be understood as at least one. “At least one” refers to one or more, and “a plurality” refers to at least two.

[0049] The "integrated structure" in the present disclosure refers to a structure in which two (or more) structures are formed by the same deposition process and patterned by the same composition process to form a structure connected to each other, and their materials may be the same or different.

[0050] During research, the inventors of the present application discovered that the light-emitting functional layer of the light-emitting element may include a plurality of light-emitting layers stacked in layers, such as a tandem (Tandem) device. Tandem devices have the characteristics of low power consumption and long life. However, a charge generation layer (CGL) is provided between at least two of the multi-layer light-emitting layers in the Tandem device, and the charge generation layer has a relatively high conductivity. For example, when the charge generation layer is a full-surface film layer, the charge generation layers of two adjacent light-emitting elements are continuous film layers, and there is a phenomenon of lateral charge migration, which causes the display substrate to shift in low grayscale monochrome chromaticity, such as easily causing crosstalk between adjacent sub-pixels, resulting in color shift on the display substrate. For example, the charge generation layer easily causes crosstalk between sub-pixels of different colors at low brightness, resulting in low grayscale color shift.

[0051] Embodiments of the present disclosure provide a display substrate and a display device. The display substrate includes a base substrate and a plurality of sub-pixels, a pixel defining pattern, and a defining structure located on the base substrate. The base substrate includes at least a first region; a plurality of sub-pixels are located in the first region, and each of at least some of the sub-pixels includes a light-emitting functional layer, the light-emitting functional layer including a plurality of film layers; a pixel defining pattern is located on the base substrate, and the pixel defining pattern includes a plurality of first openings to define the light-emitting regions of at least some of the sub-pixels; and a defining structure is located between the light-emitting functional layer and the base substrate, and the defining structure includes a portion surrounding the light-emitting region of each of at least some of the sub-pixels. The pixel defining pattern also includes a second opening, a portion of at least one layer of the light-emitting functional layer located in the first opening is a continuous portion, and at least a portion located in at least one second opening is isolated, and a portion of the defining structure exposed by the second opening is configured to isolate at least one layer of the light-emitting functional layer; the multiple sub-pixels include a first sub-pixel and a second sub-pixel, the turn-on voltage of the first sub-pixel is higher than the turn-on voltage of the second sub-pixel, the defining structure includes a first defining structure and a second defining structure, the first defining structure includes at least a portion of the light-emitting area surrounding the first sub-pixel, the second defining structure includes at least a portion of the light-emitting area surrounding the second sub-pixel, the first defining structure is not exposed by the second opening, or the ratio of the edge length of the first defining structure exposed by the second opening to the perimeter of the first opening corresponding to the first sub-pixel is less than the ratio of the edge length of the portion of the second defining structure exposed by the second opening to the perimeter of the first opening corresponding to the second sub-pixel.

[0052] In the display substrate provided by the present disclosure, the first limiting structure around the first sub-pixel with a higher turn-on voltage is set to not be exposed by the second opening or to be exposed by the second opening to a smaller extent, so that the second electrode of the first sub-pixel has a larger area of ​​the conduction channel, thereby improving the conductive effect of the second electrode of the first sub-pixel, which is beneficial to avoiding the display substrate from having problems with excessive power consumption and brightness uniformity.

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

[0054] Figure 1 is a plan view of a display substrate provided according to an embodiment of the present disclosure. Figure 2 is a structural diagram of region A11 of the display substrate shown in Figure 1 in one example. Figure 3 is a schematic diagram of a partial cross-sectional structure taken along line AA' shown in Figure 2. Figure 2 shows the first electrode of the light-emitting element, but does not show the second electrode of the light-emitting element.

[0055] As shown in Figures 1 to 3, the display substrate includes a base substrate 01, a plurality of sub-pixels 10 located on the base substrate 01, a pixel-defining pattern 400, and a defining structure 200. The base substrate 01 includes at least a first area A1; the plurality of sub-pixels 10 are located in the first area A1, and at least some of the sub-pixels 10 each include a light-emitting functional layer 130, which includes multiple film layers.

[0056] For example, a sub-pixel 10 includes a light-emitting element 100, which includes a light-emitting functional layer 130 and a first electrode 110 and a second electrode 120 located on either side of the light-emitting functional layer 130 in a direction perpendicular to the base substrate 01. The first electrode 110 is located between the light-emitting functional layer 130 and the base substrate 01. For example, the light-emitting functional layer 130 includes a charge generation layer 133. For example, the light-emitting element 100 can be an organic light-emitting element. For example, the display substrate includes a display area, the first area includes the display area, and each sub-pixel located in the display area includes a light-emitting element.

[0057] For example, as shown in FIG3 , the light-emitting functional layer 130 may include a first light-emitting layer (EML) 131, a charge generation layer (CGL) 133, and a second light-emitting layer (EML) 132, which are stacked, and the charge generation layer 133 is located between the first light-emitting layer 131 and the second light-emitting layer 132. The charge generation layer has strong conductivity, which can make the light-emitting functional layer have the advantages of long life, low power consumption, and high brightness. For example, compared with a light-emitting functional layer without a charge generation layer, the sub-pixel can increase the luminance by nearly double by providing the charge generation layer in the light-emitting functional layer.

[0058] For example, the light emitting element 100 of the same sub-pixel 10 may be a tandem light emitting element, such as a Tandem OLED.

[0059] For example, the charge generation layer 133 may include an N-type charge generation layer and a P-type charge generation layer.

[0060] For example, in each sub-pixel 10 , the light emitting functional layer 130 may further include a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL).

[0061] For example, the hole injection layer, hole transport layer, electron transport layer, electron injection layer, and charge generation layer 133 are all common layers of multiple sub-pixels 10 and can be referred to as common layers. For example, at least one layer of the light-emitting functional layer 130 that is disconnected at the edge of the defining structure 200 can be at least one layer of the common layers. By disconnecting at least one layer of the common layers at the edge of the defining structure 200 located between adjacent sub-pixels, the probability of crosstalk between adjacent sub-pixels can be reduced. For example, the common layer and the second electrode can be layers formed using an open mask.

[0062] 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 be located between the charge generation layer 133 and the first light-emitting layer 131. For example, a hole transport layer can be located 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 located between the second light-emitting layer 132 and the second electrode 120.

[0063] For example, in the same sub-pixel 10, the first light-emitting layer 131 and the second light-emitting layer 132 may be light-emitting layers that emit the same color of light. For example, the first light-emitting layer 131 in the sub-pixel 10 that emits light of different colors emits light of different colors. For example, the second light-emitting layer 132 in the sub-pixel 10 that emits light of different colors emits light of different colors. Of course, the embodiments of the present disclosure are not limited thereto. For example, in the same sub-pixel 10, the first light-emitting layer 131 and the second light-emitting layer 132 may be light-emitting layers that emit light of different colors. By providing light-emitting layers that emit light of different colors in the same sub-pixel 10, the light emitted by the multiple light-emitting layers included in the sub-pixel 10 can be mixed into white light, and the color of the light emitted from each sub-pixel can be adjusted by providing a color filter layer.

[0064] For example, the materials of the electron transport layer may include aromatic heterocyclic compounds, such as imidazole derivatives such as benzimidazole derivatives, imidazopyridine derivatives, and benzimidazolephenanthridine derivatives; oxazine derivatives such as pyrimidine derivatives and triazine derivatives; quinoline derivatives, isoquinoline derivatives, phenanthroline derivatives, and other compounds containing a nitrogen-containing six-membered ring structure (including compounds having phosphine oxide-based substituents on the heterocyclic ring), etc.

[0065] For example, the material of the charge generation layer 133 may be a material containing a phosphorus-oxygen group or a material containing triazine.

[0066] 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 to 10 2 .

[0067] For example, the first electrode 110 may be an anode, and the second electrode 120 may be a cathode. For example, the cathode may be formed of a material with high conductivity and low work function, such as a metal material. For example, the anode may be formed of a transparent conductive material with a high work function.

[0068] For example, as shown in FIG3 , the orthographic projection of the second electrode 120 in at least some of the sub-pixels 10 on the base substrate 01 is a full-surface structure. For example, the second electrode 120 may be a common electrode shared by the first sub-pixel 11 and the second sub-pixel 12. For example, the second electrode 120 may be a common electrode shared by at least some of the sub-pixels 10.

[0069] 3 , an insulating layer 500 is provided between the first electrode 110 and the base substrate 01. FIG3 omits other structures between the insulating layer 500 and the base substrate 01, such as film layers where signal lines such as gate lines and data lines are located, and other insulating layers.

[0070] As shown in Figures 1 to 3, the pixel-defining pattern 400 is located on a side of the first electrode 110 away from the substrate 01. The pixel-defining pattern 400 includes a plurality of first openings 410 to define the light-emitting area 101 of at least a portion of the sub-pixel 10. For example, each sub-pixel 10 corresponds to at least one first opening 410, and the light-emitting element 100 of the sub-pixel 10 is at least partially located in the first opening 410 corresponding to the sub-pixel 10. The first opening 410 is configured to expose the first electrode 110. For example, the first opening 410 exposes a portion of the first electrode 110. For example, each sub-pixel 10 may correspond to one first opening 410.

[0071] For example, as shown in Figures 2 and 3, when the light-emitting functional layer 130 is formed in the first opening 410 of the pixel defining pattern 400, 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 first opening 410 to emit light. For example, the light-emitting region can refer to the area where the sub-pixel effectively emits light, and the shape of the light-emitting region refers to a two-dimensional shape. For example, the shape of the light-emitting region can be the same as the shape of the first opening 410 of the pixel defining pattern 400.

[0072] 3 , the pixel defining pattern 400 includes a pixel defining portion 401 surrounding the first opening 410 . The material of the pixel defining portion 401 may include polyimide, acrylic, or polyethylene terephthalate, etc. For example, the pixel defining portion 401 included in the pixel defining pattern 400 covers a portion of the first electrode 110 .

[0073] As shown in Figures 2 and 3, the defining structure 200 is located between the light-emitting functional layer 130 and the base substrate 01. The defining structure 200 includes a portion surrounding the light-emitting area 11 of each sub-pixel 10 in at least a portion of the sub-pixels 10. For example, two adjacent sub-pixels 10 arranged along the X direction, the Y direction, or the V direction are respectively a first color sub-pixel and a second color sub-pixel. The defining structure 200 includes a portion surrounding the light-emitting area of ​​the first color sub-pixel, wherein the edge of the defining structure 200 is substantially parallel to the boundary of the light-emitting area of ​​the first color sub-pixel, and the distance between more than 90% of the positions in the defining structure and the boundary of the light-emitting area of ​​the first color sub-pixel is equal, such as the first spacing distance. The distance between the edge of the defining structure and the boundary of the light-emitting area of ​​the second color sub-pixel is the second spacing distance, and the first spacing distance is less than the second spacing distance.

[0074] In some examples, as shown in FIG. 2 and FIG. 3 , the defining structure 200 is located between the first electrode 110 and the base substrate 01 .

[0075] 3 , the orthographic projection of the first opening 410 on the substrate 01 is completely within the orthographic projection of the defining structure 200 on the substrate 01. For example, the orthographic projection of the first electrode 110 on the substrate 01 is completely within the orthographic projection of the defining structure 200 on the substrate 01.

[0076] As shown in Figures 2 and 3, the pixel defining pattern 400 further includes a second opening 420. The portion of at least one layer of the light-emitting functional layer 130 located in the first opening 410 is continuous, and at least the portion located in the at least one second opening 420 is interrupted. The portion of the defining structure 200 exposed by the second opening 420 is configured to interrupt at least one layer of the light-emitting functional layer 130. For example, the charge generation layer 133 in the light-emitting functional layer 130 is continuously disposed in the first opening 410 and interrupted in the at least one second opening 420.

[0077] For example, as shown in Figures 2 and 3, the portion of the defining structure 200 exposed by the second opening 420 includes an isolation portion 201. The isolation portion 201 is provided between at least two adjacent sub-pixels 10, and at least one layer of the light-emitting functional layer 130 is disconnected at the edge of the isolation portion 201. Providing an isolation portion between adjacent sub-pixels to isolate at least one layer of the light-emitting functional layer helps reduce crosstalk between adjacent sub-pixels. For example, the isolation portion refers to the structure exposed by the second opening in the defining structure.

[0078] In any embodiment of the present disclosure, "adjacent sub-pixels" refer to two sub-pixels with no other sub-pixels arranged between them. The adjacent sub-pixels may be two sub-pixels of the same color or two sub-pixels of different colors.

[0079] For example, as shown in FIG. 3 , at least a portion of the second electrode 120 is disconnected at an edge of the isolation portion 201 .

[0080] In some examples, as shown in FIG3 , the defining structure 200, such as the isolation portion 201, includes a first isolation layer 21 and a second isolation layer 22 that are stacked. The first isolation layer 21 is located on a side of the second isolation layer 22 away from the base substrate 01, and an edge of the first isolation layer 21 protrudes relative to an edge of the second isolation layer 22. For example, the edge of the second isolation layer 22 is indented relative to the edge of the first isolation layer 21 by no less than 0.05 micrometers, such as no less than 0.08 micrometers, such as no less than 0.1 micrometers, such as no less than 0.15 micrometers, such as no less than 0.2 micrometers, and such as no less than 0.5 micrometers.

[0081] By arranging the edge of the defining structure so that the edge of the first isolation layer protrudes relative to the edge of the second isolation layer, at least one layer of the light-emitting functional layer is isolated.

[0082] For example, as shown in FIG3 , the thickness of the confinement structure 200 may be greater than 100 angstroms. For example, the thickness of the confinement structure 200 may be 150 to 5000 angstroms. For example, the thickness of the confinement structure 200 may be 200 to 500 angstroms. For example, the thickness of the confinement structure 200 may be 300 to 1000 angstroms. For example, the thickness of the confinement structure 200 may be 400 to 2000 angstroms. For example, the thickness of the confinement structure 200 may be 600 to 1500 angstroms.

[0083] In some examples, as shown in FIG3 , the material of the first isolation layer 21 is different from the material of the second isolation layer 22 . The material of the first isolation layer 21 includes an inorganic non-metallic material or a metal material, and the material of the second isolation layer 22 includes an organic material or an inorganic non-metallic material.

[0084] For example, the etching selectivity of the etching solution to the material of the second isolation layer 22 is greater than the etching selectivity of the etching solution to the material of the first isolation layer 21 , so that the edge of the second isolation layer 22 formed after etching is retracted relative to the edge of the first isolation layer 21 .

[0085] For example, the material of the first isolation layer 21 may include silicon nitride or silicon oxide. For example, the material of the second isolation layer 22 may include polyimide or the like.

[0086] Of course, the embodiments of the present disclosure are not limited to the structure comprising a two-layer structure arranged in a stacked manner, but can also be a three-layer structure arranged in a stacked manner, wherein the layer of structure farthest from the substrate protrudes relative to the edge of the middle layer of structure to achieve isolation of the light-emitting functional layer, such as the layer of structure closest to the substrate can also protrude relative to the edge of the middle layer of structure; or the isolation portion only includes a layer of structure, the edge of which has a protrusion for isolating the light-emitting functional layer.

[0087] For example, as shown in FIG. 2 , along the V direction, the size of a first opening 410 may be larger than the size of a second opening 420 extending in a direction intersecting the V direction.

[0088] In some examples, as shown in Figures 2 and 3, the pixel-defining pattern 400 includes a pixel-defining portion 401 surrounding a first opening 410 and a second opening 420. In a direction perpendicular to the base substrate 01, at least a portion of the pixel-defining portion 401 does not overlap with the defining structure 200. For example, in a direction perpendicular to the base substrate 01, the defining structure 200 includes a portion overlapping with the pixel-defining portion 401, a portion overlapping with the first opening 410, and a portion overlapping with the second opening 420. For example, at least a portion of the pixel-defining portion 401 overlaps with a gap between adjacent defining structures 200 (e.g., the white gap between adjacent defining structures in Figure 2 is covered by the pixel-defining portion).

[0089] For example, as shown in FIG. 3 , along a direction perpendicular to the base substrate 01 , the thickness of the defining structure 200 is smaller than the thickness of the pixel defining portion 401 .

[0090] As shown in Figures 2 and 3, multiple sub-pixels 10 include a first sub-pixel 11 and a second sub-pixel 12, the turn-on voltage of the first sub-pixel 11 is higher than the turn-on voltage of the second sub-pixel 12, and the limiting structure 200 includes a first limiting structure 210 and a second limiting structure 220, the first limiting structure 210 includes a portion of the light-emitting area surrounding the first sub-pixel 11, and the second limiting structure 220 includes a portion of the light-emitting area surrounding the second sub-pixel 12.

[0091] Here, the first confining structure includes a portion overlapping with the light-emitting area of ​​the first sub-pixel and a portion surrounding the light-emitting area of ​​the first sub-pixel, and the second confining structure includes a portion overlapping with the light-emitting area of ​​the second sub-pixel and a portion surrounding the light-emitting area of ​​the second sub-pixel. For example, a second opening that exposes the edge of the confining structure surrounding the light-emitting area of ​​a sub-pixel can be referred to as a second opening surrounding the light-emitting area of ​​the sub-pixel, with the second opening being closer to the edge of the light-emitting area of ​​the sub-pixel and farther from the edges of the light-emitting areas of other sub-pixels.

[0092] As shown in Figures 2 and 3, the first confining structure 210 is not exposed by the second opening 420, and the second confining structure 220 is exposed by the second opening 420. For example, the light-emitting functional layer 130 and the second electrode 120 of the first sub-pixel 11 are not disconnected at the edge of the first confining structure 210, and the light-emitting functional layer 130 and the second electrode 120 of the second sub-pixel 12 are disconnected at the edge of the second confining structure 220. For example, the charge generation layer 133 in the light-emitting functional layer 130 shared by the first sub-pixel 11 and the second sub-pixel 12 can be disconnected at the edge of the second confining structure 220 exposed by the second opening 420 to reduce crosstalk between the first sub-pixel 11 and the second sub-pixel 12. For example, the first confining structure not being exposed by the second opening means that the first confining structure is completely covered by the pixel-defining portion surrounding the first opening and the second opening.

[0093] In the display substrate provided by the present disclosure, the turn-on voltage and power consumption of the first sub-pixel are relatively high, and the voltage (such as VSS voltage) for the display substrate to achieve white light is limited by the voltage difference between the first electrode and the second electrode of the first sub-pixel. For example, if the first sub-pixel requires a larger cross-voltage between the first electrode and the second electrode, the first limiting structure around the first sub-pixel is set to not be exposed by the second opening, so that the second electrode of the first sub-pixel is not disconnected at the edge of its corresponding first limiting structure and has a larger area of ​​the conduction channel, thereby improving the conductive effect of the second electrode of the first sub-pixel, which is beneficial to avoiding the problem of excessive power consumption and brightness uniformity in the display substrate.

[0094] The display substrate shown in FIG. 2 adopts a configuration in which the first limiting structure is not exposed by the second opening and the second limiting structure is exposed by the second opening, which is conducive to better balancing crosstalk and power consumption of the display substrate.

[0095] FIG2 schematically shows that the first sub-pixel 11 and the second sub-pixel 12 are sub-pixels configured to emit light of different colors, but the present invention is not limited thereto. The first sub-pixel and the second sub-pixel may also be configured to emit light of the same color.

[0096] In some examples, as shown in FIG. 2 , the plurality of sub-pixels 10 further includes a third sub-pixel 13 .

[0097] For example, as shown in FIG2 , the area of ​​the light-emitting region of a first sub-pixel 11 is larger than the area of ​​the light-emitting region of a second sub-pixel 12, and the area of ​​the light-emitting region of a first sub-pixel 11 is larger than the area of ​​the light-emitting region of a third sub-pixel 13. For example, the area of ​​the light-emitting region of a second sub-pixel 12 is larger than the area of ​​the light-emitting region of a third sub-pixel 13. For example, the luminous efficiency of the first sub-pixel 11 is lower than the luminous efficiency of the second sub-pixel 12 and the luminous efficiency of the third sub-pixel 13.

[0098] The luminous efficiency of a sub-pixel refers to the intensity of light emitted by the sub-pixel's light-emitting device under the same electrical signal conditions. A higher light intensity is considered to have a higher luminous efficiency. For example, the same electrical signal conditions mean the voltage written to the data line is the same. For example, the same electrical signal conditions mean the current written to the light-emitting device is the same. For example, the luminous efficiency of a sub-pixel refers to the current density flowing through the light-emitting device under the same electrical signal conditions.

[0099] In some examples, as shown in FIG2 , the first sub-pixel 11 is a blue sub-pixel, one of the second sub-pixel 12 and the third sub-pixel 13 is a red sub-pixel, and the other of the second sub-pixel 12 and the third sub-pixel 13 is a green sub-pixel. FIG2 schematically illustrates that the second sub-pixel is a red sub-pixel and the third sub-pixel is a green sub-pixel, but the present invention is not limited thereto. The second sub-pixel may also be a green sub-pixel and the third sub-pixel may be a red sub-pixel.

[0100] In some examples, as shown in Figures 2 and 3, the turn-on voltage of the first subpixel 11 is 0.1 to 5V higher than the turn-on voltage of the second subpixel 12. For example, the turn-on voltage of the first subpixel 11 is 0.1 to 5V higher than the turn-on voltage of the third subpixel 13. For example, the turn-on voltage can refer to the voltage applied to the device when the luminance is 1 cd / m2, and can also be called the light-emitting threshold voltage.

[0101] For example, the turn-on voltage of the first subpixel 11 is 0.5 to 4.5 V higher than the turn-on voltage of the second subpixel 12. For example, the turn-on voltage of the first subpixel 11 is 1 to 4 V higher than the turn-on voltage of the second subpixel 12. For example, the turn-on voltage of the first subpixel 11 is 1.5 to 3.5 V higher than the turn-on voltage of the second subpixel 12. For example, the turn-on voltage of the first subpixel 11 is 2 to 3 V higher than the turn-on voltage of the second subpixel 12. For example, the turn-on voltage of the first subpixel 11 is 0.5 to 4.5 V higher than the turn-on voltage of the third subpixel 13. For example, the turn-on voltage of the first subpixel 11 is 1 to 4 V higher than the turn-on voltage of the third subpixel 13. For example, the turn-on voltage of the first subpixel 11 is 1.5 to 3.5 V higher than the turn-on voltage of the third subpixel 13. For example, the turn-on voltage of the first subpixel 11 is 2 to 3 V higher than the turn-on voltage of the third subpixel 13. For example, the turn-on voltage of the first sub-pixel 11 is 1.5 V higher than the turn-on voltage of the second sub-pixel 12. For example, the turn-on voltage of the first sub-pixel 11 is 1.5 V higher than the turn-on voltage of the third sub-pixel 13.

[0102] For example, the power consumption of the first sub-pixel 11 is greater than the power consumption of the second sub-pixel 12 and the third sub-pixel 13 .

[0103] In some examples, as shown in FIG2 , the portion of the second confining structure 220 exposed by the second opening 420, such as the isolation portion 201, is a non-closed ring structure, and the non-closed ring structure accounts for 10% to 80% of the circumference of the second confining structure 220. The circumference of the second confining structure herein refers to the circumference of the edge of the second confining structure surrounding the light-emitting area of ​​the second sub-pixel.

[0104] For example, the proportion of the non-closed ring structure to the circumference of the corresponding first opening of the second sub-pixel is 10% to 80%, such as 15% to 50%, such as 20% to 75%, such as 25% to 60%, such as 30% to 70%, such as 45% to 55%, such as 50% to 65%.

[0105] For example, the proportion of the isolating portion 201 to the circumference of the second confining structure 220 is 15% to 50%. For example, the proportion of the isolating portion 201 to the circumference of the second confining structure 220 is 20% to 75%. For example, the proportion of the isolating portion 201 to the circumference of the second confining structure 220 is 25% to 60%. For example, the proportion of the isolating portion 201 to the circumference of the second confining structure 220 is 30% to 70%. For example, the proportion of the isolating portion 201 to the circumference of the second confining structure 220 is 45% to 55%. For example, the proportion of the isolating portion 201 to the circumference of the second confining structure 220 is 50% to 65%.

[0106] For example, the area of ​​the non-closed annular isolation portion 201 accounts for 10% to 80% of the area of ​​the closed annular edge of the second limiting structure 220 where the isolation portion 201 is located, or 15% to 50%, or 25% to 60%, or 30% to 70%, etc.

[0107] For example, as shown in Figure 2, the portion of the second limiting structure 220 located between the light-emitting areas of the first sub-pixel 11 and the second sub-pixel 12 is exposed by the second opening 420 to disconnect at least one film layer shared by the first sub-pixel 11 and the second sub-pixel 12, and the portion of the second limiting structure 220 located between the light-emitting areas of the first sub-pixel 11 and the second sub-pixel 12 that is not exposed by the second opening 420 forms a channel for conducting the second electrodes 120 of the first sub-pixel 11 and the second sub-pixel 12, which is beneficial to improving the conductive effect of the second electrode shared by the first sub-pixel and the second sub-pixel.

[0108] For example, as shown in Figure 2, the portion of the second limiting structure 220 located between the light-emitting areas of the first sub-pixel 11 and the second sub-pixel 12 includes a portion exposed by the second opening 420 and a portion not exposed by the second opening 420. The area of ​​the portion exposed by the second opening 420 is larger than the area of ​​the portion not exposed by the second opening 420 so as to ensure the conductive effect of the second electrodes of the first sub-pixel and the second sub-pixel while minimizing the crosstalk caused by the electrical connection of the common layer in the light-emitting functional layers of the two.

[0109] For example, as shown in Figure 2, the portion of the second limiting structure 220 located between the light-emitting areas of the second sub-pixel 12 and the third sub-pixel 13 is exposed by the second opening 420 to disconnect the common layer of the second sub-pixel 12 and the third sub-pixel 13, thereby reducing the crosstalk caused by the electrical connection of the common layer in the light-emitting functional layers of the two.

[0110] For example, as shown in Figure 2, the distance between the edge of the isolation portion 201 exposed by the second opening 420 of the second limiting structure 220 for disconnecting the light-emitting functional layer 130 and the edge of the first opening 410 corresponding to the second sub-pixel 12 is smaller than the distance between the edge of the isolation portion 201 and the edge of the light-emitting area of ​​the third sub-pixel 13, and the distance between the edge of the isolation portion 201 exposed by the second opening 420 for disconnecting the light-emitting functional layer 130 and the edge of the first opening 410 corresponding to the second sub-pixel 12 is smaller than the distance between the edge of the isolation portion 201 and the edge of the light-emitting area of ​​the first sub-pixel 11.

[0111] In some examples, as shown in Figures 2 and 3, the defining structure 200 also includes a third defining structure 230, which includes a portion of the light-emitting area surrounding the third sub-pixel 13, and the third defining structure 230 is not exposed by the second opening 420, or the third defining structure 230 is exposed by the second opening 420.

[0112] The third defining structure here may include a portion overlapping with the light emitting area of ​​the third sub-pixel and a portion surrounding the light emitting area of ​​the third sub-pixel.

[0113] In some examples, as shown in FIG2 , the portion of the third confining structure 230 exposed by the second opening 420, such as the isolation portion 201, is a non-closed ring structure, and the non-closed ring structure accounts for 10% to 80% of the circumference of the third confining structure 230. The circumference of the third confining structure herein refers to the circumference of the edge of the third confining structure surrounding the light-emitting area of ​​the third sub-pixel.

[0114] For example, the proportion of the non-closed ring structure to the circumference of the corresponding first opening of the third sub-pixel is 10% to 80%, such as 15% to 50%, such as 20% to 75%, such as 25% to 60%, such as 30% to 70%, such as 45% to 55%, such as 50% to 65%.

[0115] For example, the proportion of the isolating portion 201 to the circumference of the third confining structure 230 is 15% to 50%. For example, the proportion of the isolating portion 201 to the circumference of the third confining structure 230 is 20% to 75%. For example, the proportion of the isolating portion 201 to the circumference of the third confining structure 230 is 25% to 60%. For example, the proportion of the isolating portion 201 to the circumference of the third confining structure 230 is 30% to 70%. For example, the proportion of the isolating portion 201 to the circumference of the third confining structure 230 is 45% to 55%. For example, the proportion of the isolating portion 201 to the circumference of the third confining structure 230 is 50% to 65%.

[0116] For example, the area of ​​the non-closed annular isolation portion 201 accounts for 10% to 80% of the area of ​​the closed annular edge of the isolation portion in the third limiting structure 230, or 15% to 50%, or 25% to 60%, or 30% to 70%, etc.

[0117] For example, as shown in Figure 2, a portion of the third defining structure 230 located between the light-emitting areas of the first sub-pixel 11 and the third sub-pixel 13 is exposed by the second opening 420 to disconnect at least one film layer shared by the first sub-pixel 11 and the third sub-pixel 13, and a portion of the third defining structure 230 located between the light-emitting areas of the first sub-pixel 11 and the third sub-pixel 13 that is not exposed by the second opening 420 forms a channel for conducting the second electrodes 120 of the first sub-pixel 11 and the third sub-pixel 13, which is beneficial to improving the conductive effect of the second electrode shared by the first sub-pixel and the third sub-pixel.

[0118] For example, as shown in Figure 2, the portion of the third defining structure 230 located between the light-emitting areas of the second sub-pixel 12 and the third sub-pixel 13 is not exposed by the second opening 420, and the film layer shared by the second sub-pixel 12 and the third sub-pixel 13 is only separated by the isolation portion 201 exposed by the second opening 420 through the second defining structure 220.

[0119] For example, as shown in Figures 2 and 3, the portion of the second limiting structure 220 that is not exposed by the second opening 420, the portion of the third limiting structure 230 that is not exposed by the second opening 420, and the second electrode 120 set at the position of the first limiting structure 210 are connected to form conductive electrodes connected to each other, which is beneficial to improving the conductive effect of the second electrode.

[0120] For example, as shown in Figure 2, the distance between the edge of the isolation portion 201 of the third defining structure 230 exposed by the second opening 420 and the edge of the first opening 410 corresponding to the third sub-pixel 13 is smaller than the distance between the edge of the isolation portion 201 and the edge of the light-emitting area of ​​the second sub-pixel 12, and the distance between the edge of the isolation portion 201 of the third defining structure 230 exposed by the second opening 420 and the edge of the first opening 410 corresponding to the third sub-pixel 13 is smaller than the distance between the edge of the isolation portion 201 and the edge of the light-emitting area of ​​the first sub-pixel 11.

[0121] For example, as shown in Figure 2, only the isolation portion 201 in which the third limiting structure 230 is exposed by the second opening 420 is set between the adjacent first sub-pixel 11 and the third sub-pixel 13, only the isolation portion 201 in which the second limiting structure 220 is exposed by the second opening 420 is set between the adjacent first sub-pixel 11 and the second sub-pixel 12, and only the isolation portion 201 in which the second limiting structure 220 is exposed by the second opening 420 or the isolation portion 201 in which the third limiting structure 230 is exposed by the second opening 420 is set between the adjacent second sub-pixel 12 and the third sub-pixel 13.

[0122] In some examples, as shown in FIG2 , a plurality of sub-pixels 10 are arranged as a plurality of first sub-pixel groups 001 and a plurality of second sub-pixel groups 002 alternately arranged along a first direction, each first sub-pixel group 001 includes a first sub-pixel 11 and a second sub-pixel 12 alternately arranged along a second direction, and each second sub-pixel group 002 includes a third sub-pixel 13 arranged along the second direction, and the first direction intersects the second direction.

[0123] For example, the first direction may be the X direction shown in FIG. 2 , and the second direction may be the Y direction shown in FIG. 2 , and the first direction and the second direction may be interchangeable. For example, the angle between the first direction and the second direction may be 80 to 120 degrees. For example, the first direction is perpendicular to the second direction. For example, one of the first direction and the second direction may be a row direction, and the other may be a column direction. For example, the first direction may be a row direction, and the second direction may be a column direction, then the first sub-pixel group may be a first sub-pixel column, and the second sub-pixel group may be a second sub-pixel column; if the first direction may be a column direction, and the second direction may be a row direction, then the first sub-pixel group may be a first sub-pixel row, and the second sub-pixel group may be a second sub-pixel row.

[0124] In some examples, as shown in Figure 2, the first sub-pixel group 001 and the second sub-pixel group 002 are staggered in the second direction, and each first sub-pixel 11 in at least a portion of the first sub-pixels 11 is surrounded by eight sub-pixels 10, and the eight sub-pixels 10 include alternating third sub-pixels 13 and second sub-pixels 12.

[0125] For example, as shown in FIG3 , the first sub-pixels 11 and the second sub-pixels 12 are alternately arranged along the second direction, and the third sub-pixels 13 are arranged in an array along the first and second directions. For example, at least some of the second sub-pixels 12 are surrounded by eight sub-pixels 10, and the eight sub-pixels 10 include the third sub-pixels 13 and the first sub-pixels 11 that are alternately arranged.

[0126] In some examples, as shown in FIG2 , the second confining structure 220 includes a non-closed ring-shaped second isolation portion 2012 surrounding the second sub-pixel 12. The light-emitting areas of the first sub-pixel 11, the second sub-pixel 12, and the third sub-pixel 13 are all quadrilaterals, and the second isolation portion 2012 surrounds only the four sides of the light-emitting area of ​​the second sub-pixel 12. For example, the second isolation portion 2012 exposes the four corners formed by the four sides of the light-emitting area of ​​the second sub-pixel 12. For example, the length of the second isolation portion 2012 corresponding to the side of the light-emitting area of ​​the second sub-pixel 12 can be greater than or less than the side length of the light-emitting area.

[0127] In some examples, as shown in FIG2 , the third confining structure 230 includes a non-closed ring-shaped third isolation portion 2013 surrounding the light-emitting area of ​​the third sub-pixel 13. The third isolation portion 2013 surrounds two sides of the light-emitting area of ​​the third sub-pixel 13 that are adjacent to the light-emitting area of ​​the first sub-pixel 11. For example, the two sides of the light-emitting area of ​​the third sub-pixel 13 that are adjacent to the light-emitting area of ​​the second sub-pixel 12 are exposed by the third isolation portion 2013. For example, the length of the third isolation portion 2013 corresponding to the side of the light-emitting area of ​​the third sub-pixel 13 can be greater than or less than the side length of the light-emitting area.

[0128] For example, as shown in FIG. 2 , the third isolation portion 2013 exposes at least one corner of four corners formed by connecting four sides of the light emitting region of the third sub-pixel 13 .

[0129] The second isolation portion is the portion of the second confining structure exposed by the second opening. For example, if the second confining structure surrounding the light-emitting area of ​​the second sub-pixel includes a closed annular edge, the portion of this closed annular edge exposed by the second opening is the second isolation portion. The third isolation portion is the portion of the third confining structure exposed by the second opening. For example, if the third confining structure surrounding the light-emitting area of ​​the third sub-pixel includes a closed annular edge, the portion of this closed annular edge exposed by the second opening is the third isolation portion. The shapes of the second and third isolation portions are determined by the shape of the second opening.

[0130] In some examples, as shown in FIG2 , the width of the annular portion of the first defining structure 210 that is not covered by the first electrode 110 of the first sub-pixel 11 is smaller than the width of the annular portion of the second defining structure 220 that is not covered by the first electrode 110 of the second sub-pixel 12. Thus, when a second opening for exposing the edge of the second defining structure is provided, the second opening is prevented from exposing the first electrode of the second sub-pixel.

[0131] For example, as shown in FIG2 , the ring width RW1 of the annular portion of the first confinement structure 210 not covered by the first electrode 110 of the first sub-pixel 11 is smaller than the ring width RW2 of at least a portion of the annular portion of the second confinement structure 220 not covered by the first electrode 110 of the second sub-pixel 12, including the portion overlapping with the second opening 420. The ring width RW1 of the annular portion of the first confinement structure 210 not covered by the first electrode 110 of the first sub-pixel 11 is smaller than the ring width RW3 of at least a portion of the annular portion of the third confinement structure 220 not covered by the first electrode 110 of the third sub-pixel 13, including the portion overlapping with the second opening 420. Thus, when providing the second opening for exposing the edges of the second and third confinement structures, the second opening is prevented from exposing the first electrodes of the second and third sub-pixels while also preventing the second opening from exposing the edge of the adjacent first confinement structure. The "ring width" mentioned above refers to the minimum distance between the edge of the first electrode and the edge of the confinement structure surrounding the first electrode, as shown in FIG2 , if the edges of the two are substantially parallel.

[0132] For example, as shown in Figure 2, the first limiting structure 210 is not exposed by the second opening, such as the edge of the first limiting structure 210 is located outside the edge of the first electrode, such as convex, and the distance between the edge of the first limiting structure 210 and the edge of the corresponding first electrode can be set to be very small; or the edge of the first limiting structure 210 can be flush with the edge of the first electrode; or the edge of the first limiting structure 210 is retracted relative to the edge of the first electrode, but the edge of the first limiting structure 210 must be located outside the edge of the light-emitting area of ​​the first sub-pixel.

[0133] For example, as shown in FIG. 2 , more than 60% of the annular portion of the first defining structure 210 that is not covered by the first electrode 110 of the first sub-pixel 11 has substantially the same width.

[0134] For example, as shown in Figure 2, the annular portion of the third defining structure 230 that is not covered by the first electrode 110 of the third sub-pixel 13 includes a first portion exposed by the second opening 420 and a second portion that is not exposed by the second opening 420. The annular width of the first portion is greater than the annular width of the second portion, so as to prevent the third defining structure from being used to expose the second opening of the defining structure corresponding to other sub-pixels while realizing the second opening exposing the edge of the portion of the third defining structure, so as to improve the continuity of the second electrode of the third sub-pixel.

[0135] For example, as shown in FIG2 , the second defining structure 220 is exposed by the second opening 420 at each side of the light-emitting area corresponding to the second sub-pixel 12, and the ring widths of more than 60% of the annular portion of the second defining structure 220 that is not covered by the first electrode 110 of the second sub-pixel 12 are roughly equal.

[0136] For example, as shown in FIG2 , the portion of the second confinement structure 220 corresponding to at least one second sub-pixel 12 exposed by the second opening 420 is a structure arranged at intervals. For example, the portion of the third confinement structure 230 corresponding to at least one third sub-pixel 13 exposed by the second opening 420 is a structure arranged at intervals. The confinement structures corresponding to the above sub-pixels refer to confinement structures that overlap with the light-emitting area of ​​the sub-pixel.

[0137] For example, FIG2 schematically illustrates that the defining structure corresponding to one color sub-pixel is not exposed by the second opening, while the defining structures corresponding to the other color sub-pixels are all exposed by the second opening. For example, the defining structure corresponding to the blue sub-pixel is not exposed by the second opening, while the defining structures corresponding to the red and green sub-pixels are both exposed by the second opening. However, this is not limiting; alternatively, the defining structure corresponding to the green sub-pixel may not be exposed by the second opening, or the defining structure corresponding to the red sub-pixel may not be exposed by the second opening.

[0138] For example, as shown in FIG2 , the ratio of the width of the second opening 420 configured to expose the second confinement structure 220 to the width of the second opening 420 configured to expose the third confinement structure 230 is 0.5 to 1.5. For example, the ratio of the width of the second opening 420 configured to expose the second confinement structure 220 to the width of the second opening 420 configured to expose the third confinement structure 230 is 0.6 to 1.2, or 0.7 to 1.4, or 0.8 to 1.1, or 0.9 to 1.3. For example, the width of the second opening 420 configured to expose the second confinement structure 220 is equal to the width of the second opening 420 configured to expose the third confinement structure 230.

[0139] For example, as shown in FIG3 , along a direction perpendicular to the base substrate 01, the maximum thickness of the portion of the pixel-defining portion 401 overlapping the defining structure 200 is smaller than the maximum thickness of the portion of the pixel-defining portion 401 not overlapping the defining structure 200. For example, the maximum thickness of the portion of the pixel-defining portion 401 overlapping the defining structure 200 may be 0.4 microns, and the maximum thickness of the portion of the pixel-defining portion 401 not overlapping the defining structure 200 may be 0.6 microns.

[0140] FIG4 is a structural diagram of the A11 region of the display substrate shown in FIG1 in another example. The display substrate shown in FIG4 differs from the display substrate shown in FIG2 in that the positional relationship between the second opening 420 and the defining structure 200 is different. The structure of each subpixel in the display substrate shown in FIG4 , the arrangement of the multiple subpixels, the first opening in the pixel defining pattern, and the positional relationship between the first opening and the defining structure, among other features, may be similar to those described above for the display substrate shown in FIG2 and are not further described here.

[0141] As shown in Figure 4, the ratio of the edge length of the first limiting structure 210 exposed by the second opening 420 to the perimeter of the first opening 410 corresponding to the first sub-pixel is smaller than the ratio of the edge length of the portion of the second limiting structure 220 exposed by the second opening 420 to the perimeter of the first opening 410 corresponding to the second sub-pixel.

[0142] The proportion of the portion of the defining structure exposed by the second opening to the defining structure mentioned above and subsequently may refer to the proportion of the length of the portion of the defining structure exposed by the second opening to the circumference of a circle of edges of the light-emitting area of ​​the defining structure surrounding the sub-pixel, or may refer to the proportion of the area of ​​the portion of the defining structure exposed by the second opening to the area of ​​a circle of edges of the light-emitting area of ​​the defining structure surrounding the sub-pixel.

[0143] When the turn-on voltage of the first sub-pixel is higher than the turn-on voltage of the second sub-pixel, and both the first limiting structure and the second limiting structure are exposed by the second opening, by setting the proportion of the first limiting structure exposed by the second opening to be smaller than the proportion of the second limiting structure exposed by the second opening, the second electrode of the first sub-pixel has a larger area of ​​the conduction channel, thereby improving the conductive effect of the second electrode of the first sub-pixel, which is beneficial to avoiding excessive power consumption and brightness uniformity problems on the display substrate.

[0144] In some examples, as shown in FIG4 , the ratio of the edge length of the portion of the first defining structure 210 exposed by the second opening 420 to the circumference of the annular portion of the first defining structure 210 surrounding the first opening is smaller than the ratio of the edge length of the portion of the third defining structure 230 exposed by the second opening 420 to the circumference of the annular portion of the first opening surrounded by the third defining structure 230.

[0145] When the turn-on voltage of the first sub-pixel is higher than the turn-on voltages of the second sub-pixel and the third sub-pixel, and the first limiting structure, the second limiting structure and the third limiting structure are all exposed by the second opening, by setting the proportion of the first limiting structure exposed by the second opening to be smaller than the proportion of the second limiting structure exposed by the second opening and the proportion of the third limiting structure exposed by the second opening, the second electrode of the first sub-pixel has a larger area of ​​the conduction channel, thereby improving the conductive effect of the second electrode of the first sub-pixel, which is beneficial to avoiding excessive power consumption and brightness uniformity problems on the display substrate.

[0146] In some examples, as shown in Figure 4, the first defining structure 210 includes a non-closed ring-shaped first isolation portion 2011 surrounding the light-emitting area of ​​the first sub-pixel 11, the second defining structure 220 includes a non-closed ring-shaped second isolation portion 2012 surrounding the light-emitting area of ​​the second sub-pixel 12, and the third defining structure 230 includes a non-closed ring-shaped third isolation portion 2013 surrounding the light-emitting area of ​​the third sub-pixel 13.

[0147] The first isolation portion is the portion of the first limiting structure exposed by the second opening. For example, if the first limiting structure surrounding the light-emitting area of ​​the first sub-pixel includes a closed annular edge, the portion of the closed annular edge exposed by the second opening is the first isolation portion. The second isolation portion is the portion of the second limiting structure exposed by the second opening. For example, if the second limiting structure surrounding the light-emitting area of ​​the second sub-pixel includes a closed annular edge, the portion of the closed annular edge exposed by the second opening is the second isolation portion. The third isolation portion is the portion of the third limiting structure exposed by the second opening. For example, if the third limiting structure surrounding the light-emitting area of ​​the third sub-pixel includes a closed annular edge, the portion of the closed annular edge exposed by the second opening is the third isolation portion. The shapes of the first, second, and third isolation portions are determined by the shape of the second opening.

[0148] For example, as shown in FIG4 , the area ratio of the first isolating portion 2011 to the area ratio of the first confining structure 210 is 10% to 80%, such as 15% to 50%, such as 20% to 40%, such as 30% to 70%, such as 25% to 45%, etc. For example, the area ratio of the second isolating portion 2012 to the area ratio of the second confining structure 220 is 10% to 80%, such as 15% to 50%, such as 20% to 40%, such as 30% to 70%, such as 25% to 45%, etc. For example, the area ratio of the third isolating portion 2013 to the area ratio of the third confining structure 230 is 10% to 80%, such as 15% to 50%, such as 20% to 40%, such as 30% to 70%, such as 25% to 45%, etc. For example, the ratio of the area of ​​the first isolating portion 2011 to the area of ​​the first confining structure 210 is smaller than the ratio of the area of ​​the second isolating portion 2012 to the area of ​​the second confining structure 220, and the ratio of the area of ​​the first isolating portion 2011 to the area of ​​the first confining structure 210 is smaller than the ratio of the area of ​​the third isolating portion 2013 to the area of ​​the third confining structure 230. The above-mentioned area ratios of each isolating portion to each confining structure refer to the area of ​​the isolating portion to the area of ​​a closed annular edge of the confining structure including the isolating portion.

[0149] In some examples, as shown in FIG4 , the light-emitting areas 101 of the first sub-pixel 11, the second sub-pixel 12, and the third sub-pixel 13 are all quadrilaterals. The first isolation portion 2011 surrounds two adjacent sides of the light-emitting area of ​​the first sub-pixel 11 and a first corner 1011 formed by connecting the two sides. The second isolation portion 2012 surrounds two adjacent sides of the light-emitting area of ​​the second sub-pixel 12 and a second corner 1012 formed by connecting the two sides. The third isolation portion 2013 surrounds two adjacent sides of the light-emitting area of ​​the third sub-pixel 13 and a third corner 1013 formed by connecting the two sides. The first corner 1011, the second corner 1012, and the third corner 1013 all have the same orientation. FIG4 schematically shows that the first corner, the second corner, and the third corner all face left, as indicated by the arrow in the X direction. However, the orientation of the first corner, the second corner, and the third corner can also face right, or face upward, as indicated by the arrow in the Y direction, or face downward.

[0150] By setting each isolation part at the corner position of each sub-pixel facing the same direction, it is beneficial to isolate at least one layer of the light-emitting functional layer in the direction of each corner, thereby preventing crosstalk between adjacent sub-pixels; at the same time, no isolation part is set at other corners, which is beneficial to achieve electrical connection of the second electrode of each sub-pixel at a position outside the isolation part, thereby reducing power consumption.

[0151] For example, as shown in Figures 3 and 4, the first electrode 110 of each sub-pixel 10 is located on a side of the defining structure 200 away from the substrate 01. Each sub-pixel 10 also includes a pixel circuit (not shown), such as a plurality of transistors and at least one capacitor. The pixel circuit is located on a side of the defining structure 200 away from the first electrode 110. The first electrode 110 is electrically connected to the pixel circuit via a connection via that penetrates the defining structure 200. Therefore, the location of the second opening corresponding to each sub-pixel should take into account the location of the connection via in the defining structure and should avoid the connection via. For example, the connection vias of the first sub-pixel 11 and the second sub-pixel 12 are located on the upper side of their light-emitting areas, and the connection via of the third sub-pixel 13 is located on the left side of its light-emitting area. Then, the orientation of the first corner, the second corner, and the third corner can all be oriented toward the left or the upper side to avoid the location of the connection via.

[0152] For example, as shown in FIG4 , the confinement structure 200 includes a connecting portion located between the connection via of the first sub-pixel 11 and the connection via of the third sub-pixel 13, which are relatively close to each other. This connecting portion connects the first confinement structure 210 and the third confinement structure 230. For example, the first confinement structure 210 and the third confinement structure 230 connected to this connecting portion are integrally configured. Similarly, the confinement structure 200 also includes a connecting portion located between the connection via of the second sub-pixel 12 and the connection via of the third sub-pixel 13, which are relatively close to each other. This connecting portion connects the second confinement structure 220 and the third confinement structure 230, for example, the second confinement structure 220 and the third confinement structure 230 connected to this connecting portion are integrally configured.

[0153] For example, as shown in FIG4 , a first isolating portion 2011 or a second isolating portion 2012 is provided between the first sub-pixel 11 and the second sub-pixel 12 arranged along the X direction. For example, the second opening 420 may not be provided between the first sub-pixel 11 and the second sub-pixel 12 arranged along the Y direction to prevent interference with the anode connection via. For example, a first isolating portion 2011 or a third isolating portion 2013 is provided between the first sub-pixel 11 and the third sub-pixel 13, and a second isolating portion 2012 or a third isolating portion 2013 is provided between the second sub-pixel 12 and the third sub-pixel 13.

[0154] For example, as shown in Figure 4, a first sub-pixel 11 is surrounded by four third sub-pixels 13, and the first isolation portion 2011 is not provided on the portion of the first sub-pixel 11 facing the two third sub-pixels 13, while a third isolation portion 2013 is provided on each side of the two third sub-pixels 13 facing the first sub-pixel 11 to achieve continuous arrangement of the portion of the second electrode of the first sub-pixel 11 close to the two third sub-pixels 13; similarly, a second sub-pixel 12 is surrounded by four third sub-pixels 13, and the portion of the second electrode of the second sub-pixel 12 close to the two third sub-pixels 13 is continuously arranged.

[0155] For example, as shown in FIG4 , only one isolation portion is provided between two adjacent sub-pixels arranged along the X direction, only one isolation portion is provided between two adjacent sub-pixels arranged along the U direction, and only one isolation portion is provided between two adjacent sub-pixels arranged along the V direction, thereby facilitating a balance between crosstalk and power consumption between adjacent sub-pixels.

[0156] In some examples, as shown in FIG4 , the portion of the first defining structure 210 exposed by the second opening 420 accounts for a smaller proportion of the circumference of the annular portion of the first defining structure 210 surrounding the first opening than the portion of the second defining structure 210 exposed by the second opening 420 accounts for a smaller proportion of the circumference of the annular portion of the second defining structure 220 surrounding the first opening. The ring width of the annular portion of the first defining structure 210 that is not covered by the first electrode 110 of the first sub-pixel 11 and that does not overlap with the second opening 420 is a first ring width h1, and the ring width of the annular portion that overlaps with the second opening 420 is a second ring width h2. The first ring width h1 is smaller than the second ring width h2.

[0157] By setting the width of the annular portion of the first limiting structure that is not covered by the first electrode of the first sub-pixel at different positions, it is possible to achieve local isolation of the light-emitting functional layer and continuous setting of the local second electrode while preventing the second opening from exposing the edge of the first electrode of the first sub-pixel and affecting the display performance.

[0158] For example, as shown in FIG4 , the width of the portion of the second confinement structure 220 that is not covered by the first electrode 110 of the second sub-pixel 12 and that does not overlap with the second opening 420 is smaller than the width of the portion of the second confinement structure that overlaps with the second opening 420. For example, the width of the portion of the third confinement structure 230 that is not covered by the first electrode 110 of the third sub-pixel 13 and that does not overlap with the second opening 420 is smaller than the width of the portion of the third confinement structure that overlaps with the second opening 420. This helps prevent the second opening configured to expose the first confinement structure from exposing the edge of the third confinement structure that is immediately adjacent thereto, the second opening configured to expose the third confinement structure from exposing the edge of the first confinement structure that is immediately adjacent thereto, the second opening configured to expose the second confinement structure from exposing the edge of the third confinement structure that is immediately adjacent thereto, and the second opening configured to expose the third confinement structure from exposing the edge of the second confinement structure that is immediately adjacent thereto.

[0159] For example, as shown in FIG4 , the portion of the first defining structure 210 corresponding to at least one first sub-pixel 11 exposed by the second opening 420 is a continuous structure. For example, the portion of the second defining structure 220 corresponding to at least one second sub-pixel 12 exposed by the second opening 420 is a continuous structure. For example, the portion of the third defining structure 230 corresponding to at least one third sub-pixel 13 exposed by the second opening 420 is a continuous structure.

[0160] For example, FIG4 schematically illustrates that the defining structures corresponding to each color sub-pixel are all exposed by the second opening, but the proportions of the defining structures corresponding to different color sub-pixels exposed by the second opening vary. For example, the proportion of the defining structures corresponding to one color sub-pixel exposed by the second opening is smaller than the proportions of the defining structures corresponding to the other two color sub-pixels exposed by the second opening. For example, the proportion of the defining structures corresponding to the blue sub-pixel exposed by the second opening is smaller than the proportions of the defining structures corresponding to the red and green sub-pixels exposed by the second opening.

[0161] For example, as shown in FIG4 , the ratio of the width of the second opening 420 configured to expose the first confinement structure 210 to the width of the second opening 420 configured to expose the second confinement structure 220 is 0.5 to 1.5. For example, the ratio of the width of the second opening 420 configured to expose the first confinement structure 210 to the width of the second opening 420 configured to expose the second confinement structure 220 is 0.6 to 1.4, or 0.7 to 1.3, or 0.8 to 1.2, or 1.1 to 0.9. For example, the width of the second opening 420 configured to expose the first confinement structure 210 is equal to the width of the second opening 420 configured to expose the second confinement structure 220.

[0162] 5 is a structural diagram of another example of the A11 region of the display substrate shown in FIG1 . The display substrate shown in FIG5 is different from the display substrate shown in FIG4 in that the first defining structure 210 is not exposed by the second opening 420 .

[0163] In some examples, as shown in Figure 5, the first limiting structure 210 is not exposed by the second opening 420, the second limiting structure 220 includes a non-closed ring-shaped second isolation portion 2012 surrounding the light-emitting area of ​​the second sub-pixel 12, and the third limiting structure 230 includes a non-closed ring-shaped third isolation portion 2013 surrounding the light-emitting area of ​​the third sub-pixel 13; the light-emitting areas of the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 are all quadrilaterals, the second isolation portion 2012 surrounds two adjacent sides of the light-emitting area of ​​the second sub-pixel 12 and a second corner portion 1012 formed by connecting the two sides, the third isolation portion 2013 surrounds two adjacent sides of the light-emitting area of ​​the third sub-pixel 13 and a third corner portion 1013 formed by connecting the two sides, and the second corner portion 1012 and the third corner portion 1013 have the same orientation.

[0164] The second defining structure, second isolating portion, third defining structure, and third isolating portion shown in FIG5 may have the same features as the second defining structure, second isolating portion, third defining structure, and third isolating portion shown in FIG4 , and are not described in detail here. The first opening, sub-pixel structure, defining structure, etc. shown in FIG5 may have the same features as the first opening, sub-pixel structure, defining structure, etc. shown in FIG4 , and are not described in detail here.

[0165] For example, as shown in FIG. 5 , more than 60% of the annular portion of the first defining structure 210 that is not covered by the first electrode 110 of the first sub-pixel 11 has substantially the same width.

[0166] Fig. 6 is a structural diagram of another example of the A11 region of the display substrate shown in Fig. 1. The display substrate shown in Fig. 6 is different from the display substrate shown in Fig. 4 in that the shape of the first defining structure 210 exposed by the second opening 420 is different.

[0167] In some examples, as shown in FIG6 , at least one first isolation portion 2011 surrounds only two adjacent sides of the light-emitting area of ​​the first sub-pixel 11, excluding a first corner 1011 formed by connecting the two adjacent sides. By omitting the second opening from the first defining structure at the first corner of the first sub-pixel, the continuity of the second electrode of the first sub-pixel is improved while isolating at least one layer of the light-emitting functional layer of the adjacent sub-pixel.

[0168] For example, as shown in Figure 6, the portion of the defining structure corresponding to at least one of the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 exposed by the second opening 420 is a spaced-apart structure, and / or the portion of the defining structure corresponding to at least one of the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 exposed by the second opening 420 is a continuously arranged structure.

[0169] For example, as shown in Figure 6, the portion of the first limiting structure 210 corresponding to the first sub-pixel 11 exposed by the second opening 420 can be a spaced-apart structure, the portion of the second limiting structure 220 corresponding to the second sub-pixel 12 exposed by the second opening 420 can be a continuously set structure, and the portion of the third limiting structure 230 corresponding to the third sub-pixel 13 exposed by the second opening can be a continuously set structure.

[0170] For example, as shown in FIG6 , at least one second isolation portion 2012 only surrounds two adjacent sides of the light emitting area of ​​the second sub-pixel 12 except for a second corner portion 1012 formed by connecting the two adjacent sides.

[0171] For example, as shown in Figures 2 to 6, each side of the light-emitting area of ​​the first sub-pixel 11 or its extension is sequentially connected to form a polygon, and multiple vertex corners of the polygon have areas that do not overlap with multiple corners of the corresponding light-emitting area. The light-emitting area of ​​the first sub-pixel includes at least one specific corner 1014, and the area of ​​the area where the specific corner 1014 does not overlap with the vertex corner of the polygon corresponding thereto is greater than the area of ​​the area where each of at least some other corners does not overlap with the vertex corner of the polygon corresponding thereto. The portion of the defining structure 200 corresponding to the specific corner 1014 is not exposed by the second opening 420. Because the distance between the specific corner of the first sub-pixel and the light-emitting area of ​​the second sub-pixel is greater than that between the other corners, the degree of crosstalk between the light-emitting functional layer at the specific corner and the light-emitting functional layer of the adjacent sub-pixel is relatively low. By disposing the defining structure at the position corresponding to the specific corner so that it is not exposed by the second opening, the continuity of the second electrode is improved, thereby reducing power consumption.

[0172] 7 is a structural diagram of another example of the A11 region of the display substrate shown in FIG1 . The display substrate shown in FIG7 is different from the display substrate shown in FIG2 in that the third defining structure 230 is not exposed by the second opening 420 .

[0173] The shape and distribution of the second defining structure 220 shown in FIG7 exposed by the second opening 420 can be the same as the shape and distribution of the second defining structure 220 shown in FIG2 exposed by the second opening 420, and will not be repeated here. As shown in FIG7 , only the edge of the defining structure surrounding the light-emitting area of ​​one color sub-pixel is exposed by the second opening, and the edges of the defining structure surrounding the light-emitting areas of other color sub-pixels are not exposed by the second opening. For example, only the edge of the defining structure surrounding the light-emitting area of ​​the red sub-pixel is exposed by the second opening, and the edges of the defining structure surrounding the light-emitting areas of the blue sub-pixel and the green sub-pixel are not exposed by the second opening. For example, the portion of the edge of the defining structure surrounding the light-emitting area of ​​one color sub-pixel at the position corresponding to the edge of the light-emitting area is exposed by the second opening, and the portion of the edge at the position corresponding to the corner of the light-emitting area is not exposed by the second opening.

[0174] In this example, by setting the limiting structure corresponding to only one color sub-pixel to be exposed by the second opening, the continuity of the second electrodes of adjacent sub-pixels can be greatly improved while minimizing the crosstalk between the color sub-pixel and other color sub-pixels.

[0175] For example, as shown in Figure 7, the width of the annular portion of the first defining structure 210 that is not covered by the first electrode 110 of the first sub-pixel 11 and the width of the annular portion of the second defining structure 220 that is not covered by the first electrode 110 of the second sub-pixel 12 are both greater than the width of the annular portion of the third defining structure 230 that is not covered by the first electrode 110 of the third sub-pixel 13, so as to prevent the second opening configured to expose the second defining structure from exposing the edge of the third defining structure.

[0176] For example, as shown in Figure 7, the ratio of the width of the annular portion of the first confining structure 210 not covered by the first electrode 110 of the first sub-pixel 11 to the width of the annular portion of the second confining structure 220 not covered by the first electrode 110 of the second sub-pixel 12 is 0.8 to 1.2, or 0.9 to 1.1. For example, the width of the annular portion of the first confining structure 210 not covered by the first electrode 110 of the first sub-pixel 11 and the width of the annular portion of the second confining structure 220 not covered by the first electrode 110 of the second sub-pixel 12 are equal.

[0177] In the display substrates provided in each example of the present disclosure, the same second opening only exposes the limiting structure of the light-emitting area surrounding one sub-pixel, thereby reducing crosstalk between adjacent sub-pixels while improving the continuity of the second electrodes of adjacent sub-pixels to reduce power consumption.

[0178] FIG8 is a schematic diagram of a partial planar structure of the limiting structure in the display substrate shown in FIG2 and FIG4 to FIG7.

[0179] For example, as shown in FIG. 2 and FIG. 4 to FIG. 8 , along a direction perpendicular to the substrate, the portion where the limiting structure 220 overlaps with the at least two first openings 410 is an integrated structure.

[0180] For example, as shown in Figures 2 and 4 to 8, the plurality of first openings 410 include first openings 410 arranged along a first direction and first openings 410 arranged along a second direction, where the first direction intersects the second direction. The first direction may be the X direction shown in Figure 8, and the second direction may be the Y direction shown in Figure 8, but is not limited thereto, and the first and second directions may be interchangeable.

[0181] For example, as shown in FIG. 2 and FIG. 4 to FIG. 8 , the defining structure 200 includes a plurality of extending defining structures 2100 arranged along the first direction, and the minimum distance between two adjacent extending defining structures 2100 is smaller than the minimum distance between two adjacent first openings 410 arranged in the first direction.

[0182] For example, as shown in Figures 2 and 4 to 8, the multiple extension defining structures 2100 include first sub-extension defining structures 2101 and second sub-extension defining structures 2102 arranged alternately along the first direction, and the shape of the first sub-extension defining structure 2101 is different from the shape of the second sub-extension defining structure 2102.

[0183] For example, as shown in Figures 2 and 4 to 8, adjacent first sub-extension defining structures 2101 have different shapes. A second sub-extension defining structure is disposed between the adjacent first sub-extension defining structures. Because the light-emitting area of ​​a first sub-pixel has specific corners, and the positions of the specific corners of the light-emitting areas of two adjacent first sub-pixels arranged along the first direction are different, the shapes of the adjacent first sub-extension defining structures are different. A second sub-pixel is disposed between the two adjacent first sub-pixels arranged along the first direction.

[0184] For example, as shown in Figure 2 and Figures 4 to 8, the multiple sub-pixels 100 include multiple pixel groups arranged along a first direction, the sub-pixels in each pixel group are arranged along a second direction, and the first direction intersects with the second direction; the limiting structure 200 includes multiple extended limiting structures 2100 arranged along the first direction, and the orthographic projection of at least one extended limiting structure 2100 on the base substrate overlaps with the orthographic projection of the first opening 410 corresponding to two adjacent pixel groups on the base substrate, and the two adjacent extended limiting structures 2100 are arranged at intervals.

[0185] For example, as shown in Figures 2 and 4 to 8, the extended limiting structure 2100 includes a first extended limiting structure 2110 overlapping with one of the two adjacent pixel groups and a second extended limiting structure 2120 overlapping with the other of the two adjacent pixel groups. The first extended limiting structure 2110 is a continuous structure extending along the second direction. The second extended limiting structure 2120 includes a plurality of substructures arranged at intervals along the second direction, each substructure overlapping with the first opening 410 corresponding to a sub-pixel 10, and each substructure is connected to the first extended limiting structure 2110.

[0186] FIG8 schematically shows a structure in which a portion of the defining structure overlapping with the first electrode of each sub-pixel and a portion of the defining structure exposed by the second opening are integrated, but the present invention is not limited thereto and the two may also be spaced apart.

[0187] 9 and 10 are schematic diagrams of partial planar structures of display substrates according to other examples of the embodiment of the present disclosure.

[0188] The display substrate shown in FIG9 differs from the display substrate shown in FIG4 in the shape of the light-emitting area 101 of the first sub-pixel 11. As shown in FIG9 , the light-emitting area 101 of the first sub-pixel 11 includes four corners, each of which has the same features. That is, the light-emitting area 101 of the first sub-pixel 11 shown in FIG9 does not include the specific corners shown in FIG4 . Except for the shape of the light-emitting area of ​​the first sub-pixel in the display substrate shown in FIG9 , which is different from the shape of the light-emitting area of ​​the first sub-pixel in FIG4 , the other features of the display substrate shown in FIG9 are the same as those of the display substrate shown in FIG4 and are not further described here.

[0189] The display substrate shown in FIG10 differs from the display substrate shown in FIG2 in the shape of the light-emitting area 101 of the first sub-pixel 11. As shown in FIG10 , the light-emitting area 101 of the first sub-pixel 11 includes four corners, each of which has the same features. That is, the light-emitting area 101 of the first sub-pixel 11 shown in FIG10 does not include the specific corners shown in FIG2 . Except for the shape of the light-emitting area of ​​the first sub-pixel in the display substrate shown in FIG10 , which is different from the shape of the light-emitting area of ​​the first sub-pixel in FIG2 , the other features of the display substrate shown in FIG10 are the same as those of the display substrate shown in FIG2 and are not further described here.

[0190] 11 and 12 are schematic diagrams of partial cross-sectional structures of a defining structure and an insulating layer in different examples according to an embodiment of the present disclosure.

[0191] 11 , the insulating layer 500 includes a protrusion 510 on a side away from the base substrate 01 , and the orthographic projection of the protrusion 510 on the base substrate 01 overlaps with the orthographic projection of the defining structure 200 on the base substrate 01 . For example, the defining structure 200 contacts the protrusion 510 .

[0192] For example, as shown in FIG. 11 , the material defining the structure 200 includes an inorganic non-metallic material, and the material of the insulating layer 500 includes an organic material.

[0193] For example, as shown in FIG11 , at least one side edge of the defining structure 200 protrudes relative to the edge of the protrusion 510 on the side away from the base substrate 01, thereby isolating the film layer. For example, the edge of the defining structure 200 may also be flush with the edge of the protrusion 510 on the side away from the base substrate 01. For example, the dimension by which at least a portion of the edge of the defining structure 200 protrudes relative to the edge of the protrusion 500 on the side away from the base substrate 01 is less than 1 micron, such as less than 0.08 micron, such as less than 0.05 micron, and such as less than 0.02 micron.

[0194] For example, as shown in FIG11 , the thickness of the protrusion 510 may be greater than 500 angstroms. For example, the thickness of the protrusion 510 may be greater than 1000 angstroms. For example, the thickness of the protrusion 510 may be 550 to 5000 angstroms. For example, the thickness of the protrusion 510 may be 500 to 3000 angstroms. For example, the thickness of the protrusion 510 may be 600 to 2000 angstroms.

[0195] For example, as shown in FIG12 , a defining structure 200 is formed between the first electrode 110 of a sub-pixel and the base substrate 01. For example, before forming the first electrode 110 of the sub-pixel, the defining structure 200 is first deposited on an insulating layer 500, such as a planar layer, and then the first electrode 110 of the sub-pixel is formed on the defining structure 200. In this display substrate, when forming the defining structure 200 including the isolation portion 210, the planar layer 500 at the bottom of the defining structure 200 is etched, forming sawtooth. By forming the first electrode on the defining structure, the problem of sawtooth in the first electrode caused by unevenness of the planar layer can be prevented, thereby reducing the probability of display defects. For example, the orthographic projection of the first electrode 110 on the base substrate 01 can be completely within the orthographic projection of the defining structure 200 on the base substrate 01.

[0196] For example, the protrusion of the flat layer can have the same planar shape as the defining structure, such as the planar shape of the defining structure shown in Figures 8, 15-17, and the edge of the protrusion can be retracted by a certain dimension relative to the edge of the defining structure, such as the certain dimension being the dimension of the edge of the surface of the above-mentioned protrusion 500 away from the side of the substrate 01. The certain dimension can be less than 1 micron, such as less than 0.08 micron, such as less than 0.05 micron, such as less than 0.02 micron.

[0197] For example, the flat layer at the location where the defining structure is not provided may all be the portion excluding the protrusion 510 as shown in FIG. 12 .

[0198] FIG13 is a schematic diagram of a partial cross-sectional structure taken along line EE′ shown in FIG1 .

[0199] In some examples, as shown in Figures 1, 3, and 13, the base substrate 01 further includes a second area A2. For example, the first area A1 is located around the second area A2. For example, the first area can completely surround the second area, or only surround a portion of the second area, or only be located on one side of the second area. The positions of the first area and the second area can be set according to product requirements.

[0200] In some examples, as shown in Figures 1, 3 and 13, the limiting structure 200 includes at least one closed annular limiting structure 240 surrounding the second area A2, and the light-emitting functional layer 130 and the second electrode 120 are both disconnected at the edge of the annular limiting structure 240.

[0201] The second area is not provided with sub-pixels for display. By providing at least one annular limiting structure around the second area for disconnecting the light-emitting functional layer and the second electrode, the light-emitting element located in the first area can be separated from the second area to isolate water and oxygen from the light-emitting functional layer and other film layers.

[0202] For example, as shown in FIG1 , the first area A1 surrounds at least a portion of the second area A2. For example, the second area A2 shown in FIG1 is located in the top center of the substrate 01. For example, the four sides of the rectangular first area A1 can all surround the second area A2, that is, the second area A2 can be surrounded by the first area A1. For example, the second area A2 may not be located in the top center of the substrate 01 shown in FIG1 , but may be located at other positions. For example, the second area A2 may be located in the upper left corner or the upper right corner of the substrate 01. For example, the first area A1 may include a display area, and the second area A2 may be a display area or a non-display area, such as a hole area. For example, the hole area may be provided with required hardware structures such as a light sensor. For example, the first area A1 may include a display area away from the second area A2 and a non-display area surrounding the second area A2. For example, the first annular limiting structure is located in the display area.

[0203] For example, the shape of the second area A2 can be circular, elliptical, or racetrack-shaped (e.g., including two straight sides and two arcs connecting the two straight sides). However, the shape of the second area A2 can be polygonal, such as a quadrilateral, hexagonal, or octagonal. For example, the shape of the first area A1 can be quadrilateral, such as a rectangle, but is not limited to this. The shape of the first area A1 can also be circular, or other polygons other than quadrilaterals, such as a hexagonal or octagonal.

[0204] In some examples, as shown in FIG. 1 , FIG. 3 , and FIG. 13 , along a direction perpendicular to the base substrate 01 , the annular defining structure 240 does not overlap with the pixel defining portion 401 .

[0205] In some examples, as shown in FIG1 and FIG13 , the at least one closed ring-shaped defining structure 240 includes multiple ring-shaped defining structures 240, and the spacing between two adjacent ring-shaped defining structures 240 is no less than 1 micron. For example, the spacing between two adjacent ring-shaped defining structures 240 is no less than 2 microns. For example, the spacing between two adjacent ring-shaped defining structures 240 is no less than 5 microns. For example, the spacing between two adjacent ring-shaped defining structures 240 is no less than 6 microns, such as no less than 7 microns, such as no less than 8 microns, such as no less than 9 microns, etc.

[0206] For example, as shown in FIG1 , the annular defining structure 240 is located in the first area A1 and surrounds the second area A2, or the annular defining structure 240 is located in the second area A2 and surrounds the center area of ​​the second area A2. For example, the number of annular defining structures 240 may be three, but is not limited thereto. The number of annular defining structures 240 may be one, two, four, or more, and may be set according to product requirements.

[0207] For example, as shown in Figures 1, 3, and 13, the portion of the defining structure 200 located in the first area A1 that is exposed by the second opening 420 forms a non-closed annular isolation portion, while the defining structure 200 located in the second area A2 is not covered by the pixel defining portion 401, and this portion of the defining structure 200 forms at least one closed annular defining structure 240. For example, the defining structure 200 located in the first area A1 and the defining structure 200 located in the second area A2 can be formed in the same patterning process, and the defining structures 200 located in the two areas have the same material, thickness, and other characteristics, but the planar shapes and arrangements of the defining structures 200 in the two areas are different.

[0208] For example, as shown in Figures 3 and 13, the insulating layer 500 can be a planarization (PLN) layer. For example, the annular confining structure 240 is located on a side of the insulating layer 500 away from the substrate 01. For example, at least a portion of the insulating layer 500 located on a side of the annular confining structure 240 near the center of the second area A2 is removed to achieve moisture isolation. For example, the minimum distance between the edge of the insulating layer 500 away from the annular confining structure 240 and the annular confining structure 240 is greater than 1 micron.

[0209] For example, as shown in FIG13 , in a direction perpendicular to the base substrate 01, the annular defining structure 240 does not overlap with the pixel defining portion 401. For example, the minimum distance between the annular defining structure 240 and the pixel defining portion 401 is greater than 1 micron. Of course, the disclosed embodiments are not limited to this. In a direction perpendicular to the base substrate, the portion of the annular defining structure farthest from the second region may overlap with the pixel defining portion, and the overlap may be less than 1 micron, such as less than 0.8 microns, or less than 0.5 microns.

[0210] For example, FIG13 schematically shows that an insulating layer 500 is provided between adjacent annular limiting structures 240 , but the present invention is not limited thereto. The insulating layer may be removed between adjacent annular limiting structures to further improve the water vapor isolation effect.

[0211] Figure 14A is a partial plan view of a display substrate provided according to another example of the present disclosure. Figure 14B is a partial cross-sectional structural schematic diagram taken along line DD' shown in Figure 14A.

[0212] For example, as shown in Figures 14A and 14B, a buffer layer and a shielding layer 021 are provided on the substrate, an active layer 026 located on the buffer layer and the shielding layer 021, a gate insulating layer 022 located on the active layer 026, a metal layer 028 located on the gate insulating layer 022, a gate insulating layer 023 located on the metal layer 028, a metal layer 027 located on the gate insulating layer 023, an interlayer insulating layer 024 located on the metal layer 027, a metal layer 031 located on the interlayer insulating layer 024, and a planar layer 500 located on the metal layer 031. Region A1 may be the region where the sub-pixels are provided, and region A2 may be the region surrounded by the annular defining structure 240. Figure 14B schematically illustrates a transistor having a top-gate structure, but is not limited thereto. The transistor may also have a bottom-gate structure, a single-gate structure, or the like. For example, metal layer 031 may be a source-drain metal layer, such as a metal layer electrically connected to the source and drain regions of active layer 026.

[0213] For example, as shown in Figures 14A and 14B, a defining structure 200 that overlaps with the light-emitting area and surrounds the second area can be formed simultaneously, so that the masks forming the defining structures at the two positions are merged and compatible, which is beneficial to reducing the number of masks and thus reducing the cost of producing the display substrate.

[0214] For example, as shown in Figures 14A and 14B , the annular defining structure 240 is located on a side of the planar layer 500 away from the base substrate 01. For example, the edge of the outermost annular defining structure 240 away from the center of the second area A2 can be covered by the pixel defining portion 401, but the edge of the outermost annular defining structure 240 near the center of the second area A2 cannot overlap with the pixel defining portion 401, thereby achieving the effect of isolating the second electrode and other film layers.

[0215] For example, as shown in Figures 14A and 14B, a partition structure 250 is further provided on one side of the annular limiting structure 240 near the center of the second area A2 to further isolate the second electrode and other film layers. For example, the partition structure 250 can be a ring-shaped structure surrounding the second area A2. For example, the partition structure 250 can be a structure provided on the same layer as the metal layer 031. For example, the partition structure 250 can include at least two stacked metal layers, with the metal layer on the side farthest from the base substrate 01 protruding relative to the edge of the metal layer in contact with it to achieve a partitioning effect. For example, the partition structure 250 can include three metal layers, such as a titanium / aluminum / titanium structure, to form an "I"-shaped structure.

[0216] For example, as shown in FIG14B , in a direction perpendicular to the base substrate 01, the insulating layer 500 and the partition structure 250 do not overlap, and the insulating layer 500 is located on the side of the partition structure 250 away from the second area A2. For example, the distance between the partition structure 250 and the boundary of the insulating layer 500 is greater than 1 micron. For example, the other insulating layers between the partition structure 250 and the base substrate 01 are all inorganic insulating layers to enhance the moisture barrier effect.

[0217] For example, as shown in FIG. 14B , the partition structure 250 may include a multi-ring structure, such as four rings, six rings, etc.

[0218] For example, as shown in FIG. 13 and FIG. 14B , the insulating layer 500 below the ring-defining structure 240 includes a protrusion 510 , such as a flat layer loss.

[0219] For example, as shown in Figures 1, 13, and 14A-14B, the second area A2 is circular in shape, and the closed annular defining structure 240 has a width of no less than 1 mm. For example, the width of the annular defining structure 240 may be 3 mm. For example, the second area A2 is runway-shaped, such as a runway shape including two long sides and two arcuate sides connecting the two long sides. The width of the portion of the annular defining structure 240 adjacent to the long sides is no less than 1 mm, and the width of the portion of the annular defining structure 240 adjacent to the arcuate sides is no less than 1 mm.

[0220] 1 , 13 , and 14A to 14B , the minimum distance between the annular defining structure 240 and the defining structure 200 overlapping the first opening 410 is greater than 1 micron. For example, the minimum distance between the defining structure 200 overlapping the first opening 410 and the boundary of the pixel defining portion 401 is greater than 1 micron.

[0221] For example, as shown in FIG. 13 and FIG. 14B , the annular limiting structure 240 may include only one film layer or multiple inorganic layers, and may be configured according to product requirements.

[0222] Figures 15 to 17 are partial plan views of the structure of a restriction according to other examples of the present disclosure. The restriction structures shown in Figures 15 to 17 can be applied to the display substrates shown in Figures 2 and 4 to 10, taking the restriction structure shown in Figures 15 to 17 applied to the display substrate shown in Figure 2 as an example.

[0223] For example, as shown in FIG. 15 , the defining structure 200 includes a first defining structure 210 , a second defining structure 220 , and a third defining structure 330 .

[0224] For example, as shown in Figures 2 and 15, the multiple sub-pixels 10 include sub-pixels 10 arranged along a first direction and sub-pixels 10 arranged along a second direction, and the first direction intersects with the second direction; the limiting structure 200 includes a plurality of limiting blocks 2200 arranged in an array, and along a direction perpendicular to the substrate, at least one limiting block 2200 overlaps with the corresponding first openings 410 of two sub-pixels 10 of different colors, and the center line of the positive projection of the first openings 410 corresponding to the two sub-pixels 10 of different colors on the substrate intersects with both the first direction and the second direction, and adjacent limiting blocks 2200 are arranged at intervals.

[0225] For example, as shown in Figures 2 and 15, at least one limiting block 2200 includes a first sub-limiting block 2201 and a second sub-limiting block 2202 that overlap with the first openings 410 corresponding to two sub-pixels 10 of different colors, respectively. The first sub-limiting block 2201 and the second sub-limiting block 2202 are an integrated structure and are arranged in a direction perpendicular to the base substrate.

[0226] For example, as shown in Figures 2 and 15, the limiting blocks 220 arranged along any one of the first direction and the second direction include first limiting blocks 2210 and second limiting blocks 2220 that are alternately arranged, and along the direction perpendicular to the base substrate, the color of light emitted by one of the two different color sub-pixels 10 overlapping with the first limiting block 2210 is the same as the color of light emitted by one of the two different color sub-pixels 10 overlapping with the second limiting block 2220.

[0227] For example, as shown in Figures 2 and 15, the first limiting block 2210 overlaps with the light-emitting areas of the first sub-pixel 11 and the third sub-pixel 13, and the second limiting block 2220 overlaps with the light-emitting areas of the second sub-pixel 12 and the third sub-pixel 13.

[0228] For example, as shown in FIG. 16 , the defining structure 200 includes a first defining structure 210 , a second defining structure 220 , and a third defining structure 330 .

[0229] For example, as shown in Figures 2 and 16, the limiting structure 200 includes a plurality of first extended limiting structures 2310 arranged along a first direction and a plurality of second extended limiting structures 2320 arranged along a second direction. The plurality of first extended limiting structures 2310 are connected to the plurality of second extended limiting structures 2320 to form a grid structure. The first extended limiting structure 2310 includes a limiting overlapping portion that overlaps with the light-emitting area of ​​the sub-pixel 10 arranged along the second direction. The second extended limiting structure 2320 includes a limiting overlapping portion that overlaps with the light-emitting area of ​​the sub-pixel 10 arranged along the first direction. The orthographic projection of the light-emitting area 101 of the sub-pixel 10 on the substrate is completely located within the orthographic projection of the limiting overlapping portion on the substrate.

[0230] For example, as shown in Figure 16, the first extended limiting structure 2310 includes alternating first limiting structures 210 and second limiting structures 220, and a connecting structure is provided between adjacent first limiting structures 210 and second limiting structures 220; the second extended limiting structure 2320 includes a plurality of third limiting structures 230 arranged along the first direction, and a connecting structure is provided between adjacent third limiting structures 230.

[0231] For example, as shown in FIG. 17 , the defining structure 200 includes a first defining structure 210 , a second defining structure 220 , and a third defining structure 330 .

[0232] For example, the limiting structure shown in FIG. 17 is different from the limiting structure shown in FIG. 16 in that a connecting structure 2330 is provided between the adjacent first limiting structures 210 and the second limiting structures 220 arranged along the X direction.

[0233] FIG18 is a schematic diagram of a partial planar structure of a display substrate provided according to another example of an embodiment of the present disclosure.

[0234] The display substrate shown in FIG. 18 differs from the display substrate shown in FIG. 2 in that the second opening 420 is configured to expose a portion of the edge of the first defining structure 210 and a portion of the edge of the second defining structure 220 , and the third defining structure 230 does not overlap with the second opening 420 .

[0235] Another embodiment of the present disclosure provides a display substrate, comprising a base substrate, a plurality of sub-pixels, a pixel-defining pattern, and a defining structure located on the base substrate. The base substrate comprises at least a first region; the plurality of sub-pixels are located in the first region, 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 pixel-defining pattern comprises a plurality of first openings to define light-emitting regions of at least some of the sub-pixels; and the defining structure is located between the light-emitting functional layer and the base substrate, the defining structure comprising a portion surrounding the light-emitting region of each of at least some of the sub-pixels. The pixel defining pattern also includes a second opening, a portion of at least one layer of the light-emitting functional layer located in the first opening is a continuous portion, and at least a portion located in at least one second opening is isolated, and a portion of the defining structure exposed by the second opening is configured to isolate at least one layer of the light-emitting functional layer, the multiple sub-pixels include a first sub-pixel and a second sub-pixel, a turn-on voltage of the first sub-pixel is higher than a turn-on voltage of the second sub-pixel, a distance between an edge of the light-emitting area of ​​the first sub-pixel and the second opening closest to the edge of the light-emitting area is a first distance, a distance between an edge of the light-emitting area of ​​the second sub-pixel and the second opening adjacent to the edge of the light-emitting area is a second distance, and the first distance is greater than the second distance, or, the defining structure includes a first defining structure and a second defining structure, the first defining structure includes a portion surrounding the light-emitting area of ​​the first sub-pixel, the second defining structure includes a portion surrounding the light-emitting area of ​​the second sub-pixel, and the proportion of the portion of the first defining structure exposed by the second opening to the first defining structure is less than the proportion of the portion of the second defining structure exposed by the second opening to the second defining structure.

[0236] In the display substrate provided by the present disclosure, by setting the edge of the light-emitting area of ​​the first sub-pixel with a higher turn-on voltage to be farther away from the second opening, or by exposing a smaller portion of the first limiting structure corresponding to the first sub-pixel to the second opening, the second electrode of the first sub-pixel has a larger area of ​​the conduction channel, thereby improving the conductive effect of the second electrode of the first sub-pixel, and helping to avoid problems of excessive power consumption and brightness uniformity in the display substrate.

[0237] Figures 1 to 17 may be applicable to the display substrate provided in this embodiment. As shown in Figures 1 to 3, the display substrate includes a base substrate 01, a plurality of sub-pixels 10 located on the base substrate 01, a pixel-defining pattern 400, and a defining structure 200. The base substrate 01 includes at least a first region A1; the plurality of sub-pixels 10 are located in the first region A1, and at least some of the sub-pixels 10 each include a light-emitting functional layer 130, which comprises multiple film layers.

[0238] The sub-pixel provided in this embodiment has the same features as the sub-pixel provided in the above embodiment, such as including a light-emitting functional layer 130 and a first electrode 110 and a second electrode 120 located on both sides of the light-emitting functional layer 130 along a direction perpendicular to the base substrate 01, which will not be repeated here.

[0239] As shown in Figures 2 and 3, the pixel-defining pattern 400 is located on a side of the first electrode 110 away from the base substrate 01. The pixel-defining pattern 400 includes a plurality of first openings 410 to define the light-emitting region 101 of at least a portion of the sub-pixel 10. The pixel-defining pattern 400 also includes second openings 420. The portion of at least one layer of the light-emitting functional layer 130 located in the first openings 410 is continuous, and at least the portion located in the at least one second opening 420 is interrupted. The portion of the defining structure 200 exposed by the second opening 420 is configured to interrupt at least one layer of the light-emitting functional layer 130.

[0240] As shown in FIG. 2 and FIG. 3 , the defining structure 200 is located between the light-emitting functional layer 130 and the base substrate 01 . The defining structure 200 includes a portion surrounding the light-emitting region 11 of each sub-pixel 10 in at least a portion of the sub-pixels 10 .

[0241] The features of the limiting structure in this embodiment, such as the structure included in the limiting structure, the positional relationship between the limiting structure and the first opening and the second opening, etc., may be the same as the corresponding features in the above embodiments and will not be repeated here.

[0242] As shown in Figures 2 to 3, the multiple sub-pixels 10 include a first sub-pixel 11 and a second sub-pixel 12. The turn-on voltage of the first sub-pixel 11 is higher than the turn-on voltage of the second sub-pixel 12. The distance between the edge of the light-emitting area of ​​the first sub-pixel 11 (such as the edge of the area defined by the first opening 410) and the second opening 420 closest to the edge of the light-emitting area is a first distance D1. The distance between the edge of the light-emitting area of ​​the second sub-pixel 12 and the second opening 420 adjacent to the edge of the light-emitting area is a second distance D2. The first distance D1 is greater than the second distance D2.

[0243] As shown in Figures 2 to 3, the defining structure 200 includes a first defining structure 210 and a second defining structure 220. The first defining structure 210 includes a portion of the light-emitting area 101 surrounding the first sub-pixel 11, and the second defining structure 220 includes a portion of the light-emitting area 101 surrounding the second sub-pixel 12. The second opening 420 closest to the edge of the light-emitting area of ​​the second sub-pixel 12 is the second opening 420 that exposes the second defining structure 220, and the second opening 420 does not expose the first defining structure 11.

[0244] In the display substrate provided by the present disclosure, by setting the edge of the light-emitting area of ​​the first sub-pixel with a higher turn-on voltage to be farther away from the second opening, the second electrode of the first sub-pixel has a larger area of ​​the conduction channel, thereby improving the conductive effect of the second electrode of the first sub-pixel, which is beneficial to avoiding the display substrate from having problems with excessive power consumption and brightness uniformity.

[0245] For example, as shown in FIG2 , the plurality of sub-pixels 10 further include a third sub-pixel 13, the defining structure 200 further includes a third defining structure 230, and the third defining structure 230 includes a portion surrounding the light-emitting region 101 of the third sub-pixel 13. The minimum distance between the second opening 420 configured to expose the second defining structure 220 and the edge of the light-emitting region of the third sub-pixel 13 is greater than the second distance D2. For example, the second opening 420 configured to expose the second defining structure 220 does not expose the third defining structure 230.

[0246] In some examples, as shown in Figures 2 and 3, a second opening 420 is provided between the first sub-pixel 11 and the third sub-pixel 13. The distance between the edge of the light-emitting area of ​​the first sub-pixel 11 and the second opening 420 is a third distance D3, and the distance between the edge of the light-emitting area of ​​the third sub-pixel 13 and the second opening 420 is a fourth distance D4. The third distance D3 is greater than the fourth distance D4. For example, the second opening 420 is the second opening 420 that exposes the third confining structure 230, and the second opening 420 does not expose the first confining structure 210.

[0247] In some examples, as shown in FIG2 , the turn-on voltage of the first sub-pixel 11 is 0.1 to 5 V higher than the turn-on voltage of the second sub-pixel 12. In this embodiment, the relationship between the turn-on voltages of the first sub-pixel, the second sub-pixel, and the third sub-pixel can have the same characteristics as those in the above embodiment and will not be repeated here.

[0248] In some examples, as shown in FIG2 , the portion of the second confining structure 220 exposed by the second opening 420 is a non-closed annular structure, and the non-closed annular structure accounts for 10% to 80% of the circumference of the second confining structure 220. As shown in FIG2 , the portion of the third confining structure 230 exposed by the second opening 420 is a non-closed annular structure, and the non-closed annular structure accounts for 10% to 80% of the circumference of the third confining structure 230.

[0249] As shown in FIG. 4 , the portion of the first confining structure 210 exposed by the second opening 420 accounts for a smaller proportion of the first confining structure 210 than the portion of the second confining structure 220 exposed by the second opening 420 accounts for a smaller proportion of the second confining structure 220 .

[0250] In some examples, as shown in FIG. 4 , the portion of the first confining structure 210 exposed by the second opening 420 accounts for a smaller proportion of the first confining structure 210 than the portion of the third confining structure 230 exposed by the second opening 420 accounts for a smaller proportion of the third confining structure 230 .

[0251] In this embodiment, the relationship between the first limiting structure and the second opening, the relationship between the second limiting structure and the second opening, and the relationship between the third limiting structure and the second opening may have the same characteristics as the corresponding relationships in any example of the above embodiments, and will not be repeated here.

[0252] In some examples, as shown in Figures 1, 3 and 13, the substrate 01 also includes a second area A2, the first area A1 is located around the second area A2, the limiting structure 200 includes at least one closed annular limiting structure 240 surrounding the second area A2, and the light-emitting functional layer 130 and the second electrode 120 are both disconnected at the edge of the annular limiting structure 240.

[0253] The second region and the annular limiting structure provided in the second region in this embodiment may have the same features as the second region and the annular limiting structure provided in the second region in the above-mentioned embodiment, and are not described in detail here.

[0254] Another embodiment of the present disclosure provides a display substrate, which includes: a base substrate, including at least a first area; a plurality of sub-pixels, located in the first area, each sub-pixel in at least some of the sub-pixels including a light-emitting functional layer, the light-emitting functional layer including a plurality of film layers; a pixel defining pattern, located on the base substrate, the pixel defining pattern including a plurality of first openings to define the light-emitting area of ​​at least some of the sub-pixels; a defining structure, located between the light-emitting functional layer and the base substrate, the defining structure including a portion surrounding the light-emitting area of ​​each sub-pixel in at least some of the sub-pixels, wherein the pixel defining pattern also includes a second opening, the portion of at least one layer of the light-emitting functional layer located in the first opening is a continuous portion, and the portion located in at least one second opening is isolated, and the portion of the defining structure exposed by the second opening is configured to isolate the at least one layer of the light-emitting functional layer; the plurality of sub-pixels include a first sub-pixel and a second sub-pixel The aperture ratio of the first sub-pixel is greater than the aperture ratio of the second sub-pixel, the defining structure includes a first defining structure and a second defining structure, the first defining structure includes at least a portion surrounding the light-emitting area of ​​the first sub-pixel, and the second defining structure includes at least a portion surrounding the light-emitting area of ​​the second sub-pixel, the first defining structure is not exposed by the second opening, or the ratio of the edge perimeter of the portion of the first defining structure exposed by the second opening to the perimeter of the first opening surrounded by the first defining structure is smaller than the ratio of the edge perimeter of the portion of the second defining structure exposed by the second opening to the perimeter of the first opening surrounded by the second defining structure, or the distance between the edge of the light-emitting area of ​​the first sub-pixel and the second opening closest to the edge of the light-emitting area is a first distance, the distance between the edge of the light-emitting area of ​​the second sub-pixel and the second opening adjacent to the edge of the light-emitting area is a second distance, and the first distance is greater than the second distance.

[0255] For example, the light emitting efficiency of the first sub-pixel is lower than the light emitting efficiency of the second sub-pixel.

[0256] For example, the lifetime of the first sub-pixel is shorter than the lifetime of the second sub-pixel.

[0257] Because the first sub-pixel has low luminous efficiency and a short lifespan, setting the aperture ratio of the first sub-pixel to be larger helps reduce the voltage drop in the first sub-pixel. In the display substrate provided by the present disclosure, by setting the first limiting structure around the first sub-pixel with a higher aperture ratio to be not exposed by the second opening or to have a smaller portion exposed by the second opening, the second electrode of the first sub-pixel has a larger area conduction channel, improving the conductivity of the second electrode of the first sub-pixel, and helping to avoid excessive power consumption and brightness uniformity issues in the display substrate.

[0258] For example, the first sub-pixel may include a fluorescent light-emitting device, and the second sub-pixel may include a phosphorescent light-emitting device. For example, the first sub-pixel may be a blue sub-pixel, and the second sub-pixel may be a red sub-pixel or a green sub-pixel.

[0259] For example, the wavelength of the light emitted by the first sub-pixel is shorter than the wavelength of the light emitted by the second sub-pixel. For example, the first sub-pixel emits blue light, and the second sub-pixel emits green light or red light.

[0260] For example, the power consumption required when the first sub-pixel emits light is greater than the power consumption required when the second sub-pixel emits light.

[0261] The characteristics of each sub-pixel, the defining structure, and the characteristics of the pixel defining pattern in this embodiment may be the same as the corresponding characteristics in any of the above embodiments, and will not be repeated here.

[0262] Another embodiment of the present disclosure provides a display substrate, comprising: a base substrate including a first region and a second region, wherein the first region is located around the second region; a plurality of sub-pixels located in the first region, wherein each of at least some of the sub-pixels includes a light-emitting functional layer and a first electrode and a second electrode located on either side of the light-emitting functional layer in a direction perpendicular to the base substrate, wherein the first electrode is located between the light-emitting functional layer and the base substrate, and the light-emitting functional layer includes a plurality of film layers; a pixel-defining pattern located on a side of the first electrode away from the base substrate, wherein the pixel-defining pattern includes a plurality of first openings to define a light-emitting region of at least some of the sub-pixels; A defining structure is located between the light-emitting functional layer and the base substrate, and the defining structure includes a portion surrounding the light-emitting area of ​​each sub-pixel in at least some of the sub-pixels, wherein the pixel defining pattern also includes a second opening, and the portion of at least one layer of the light-emitting functional layer located in the first opening is a continuous portion, and is at least partially isolated in at least one second opening, and the portion of the defining structure exposed by the second opening is configured to isolate the at least one layer of the light-emitting functional layer; the defining structure includes at least one closed annular defining structure surrounding the second area, and the light-emitting functional layer and the second electrode are both disconnected at the edge of the annular defining structure.

[0263] In the display substrate provided by the present disclosure, no sub-pixels for emitting light are provided in the second area. By providing at least one annular limiting structure for disconnecting the light-emitting functional layer and the second electrode around the second area, the light-emitting element located in the first area can be separated from the second area to isolate water and oxygen from the light-emitting functional layer and other film layers.

[0264] For example, the pixel defining pattern includes a pixel defining portion surrounding the first opening and the second opening, and along a direction perpendicular to the base substrate, the annular defining structure and the pixel defining portion do not overlap.

[0265] For example, the at least one closed annular limiting structure includes multiple ring-shaped limiting structures, and the interval between two adjacent ring-shaped limiting structures is not less than 5 microns.

[0266] For example, the multiple sub-pixels include a first sub-pixel and a second sub-pixel, the defining structure includes a first defining structure and a second defining structure, the first defining structure includes at least a portion of the light-emitting area surrounding the first sub-pixel, the second defining structure includes at least a portion of the light-emitting area surrounding the second sub-pixel, and the portion of the second defining structure exposed by the second opening is a non-closed ring structure.

[0267] For example, the first defining structure is not exposed by the second opening, or the portion of the first defining structure exposed by the second opening is a non-closed ring structure.

[0268] For example, the turn-on voltage of the first sub-pixel is higher than the turn-on voltage of the second sub-pixel.

[0269] For example, the ratio of the edge perimeter of the portion of the first defining structure exposed by the second opening to the perimeter of the first opening surrounded by the first defining structure is smaller than the ratio of the edge perimeter of the portion of the second defining structure exposed by the second opening to the perimeter of the first opening surrounded by the second defining structure.

[0270] For example, the minimum distance between the boundary of the defining structure overlapping the first opening and the boundary of the annular defining structure is greater than 1 micrometer.

[0271] For example, the minimum distance between the ring-shaped defining structure and the boundary of the pixel-defining portion is greater than 1 micrometer.

[0272] For example, a planar layer is provided between the pixel defining portion and the base substrate, and a minimum distance between the annular defining structure and a boundary of the planar layer is greater than 1 micrometer.

[0273] The characteristics of each sub-pixel, the defining structure, and the characteristics of the pixel defining pattern in this embodiment may be the same as the corresponding characteristics in any of the above embodiments, and will not be repeated here.

[0274] Another embodiment of the present disclosure provides a display device, which includes any one of the above-mentioned display substrates.

[0275] For example, the display device further includes a cover plate located on the light-emitting side of the display substrate.

[0276] For example, the display device can be a display device such as an organic light emitting diode display device, as well as any product or component with a display function, such as a television, digital camera, mobile phone, watch, tablet computer, laptop computer, navigator, etc. that includes the display device, but this embodiment is not limited to this.

[0277] There are a few points to note:

[0278] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to conventional designs.

[0279] (2) In the absence of conflict, features in the same embodiment and different embodiments of the present disclosure may be combined with each other.

[0280] The foregoing description is merely an exemplary embodiment of the present disclosure and is not intended to limit the scope of protection of the present disclosure. The scope of protection of the present disclosure is determined by the appended claims.

Claims

1. A display substrate, comprising: A substrate base plate, comprising at least a first region; A plurality of sub-pixels are located in the first region, and 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; A pixel defining pattern, located on the base substrate, the pixel defining pattern comprising a plurality of first openings to define a light emitting area of ​​at least part of the sub-pixels; a defining structure, located between the light-emitting functional layer and the substrate, the defining structure including a portion surrounding a light-emitting region of each sub-pixel in the at least some sub-pixels, The pixel defining pattern further includes a second opening, a portion of at least one layer of the light-emitting functional layer located in the first opening is a continuous portion, and at least a portion located in at least one second opening is isolated, and a portion of the defining structure exposed by the second opening is configured to isolate the at least one layer of the light-emitting functional layer; The plurality of sub-pixels include a first sub-pixel and a second sub-pixel, a turn-on voltage of the first sub-pixel is higher than a turn-on voltage of the second sub-pixel, the defining structure includes a first defining structure and a second defining structure, the first defining structure at least includes a portion of a light emitting area surrounding the first sub-pixel, and the second defining structure at least includes a portion of a light emitting area surrounding the second sub-pixel, The first limiting structure is not exposed by the second opening, or the ratio of the edge length of the portion of the first limiting structure exposed by the second opening to the perimeter of the first opening corresponding to the first sub-pixel is smaller than the ratio of the edge length of the portion of the second limiting structure exposed by the second opening to the perimeter of the first opening corresponding to the second sub-pixel.

2. The display substrate according to claim 1, wherein: The turn-on voltage of the first sub-pixel is 0.1 to 5V higher than the turn-on voltage of the second sub-pixel.

3. The display substrate according to claim 1 or 2, wherein: The portion of the second limiting structure exposed by the second opening is a non-closed ring structure, and the non-closed ring structure accounts for 10% to 80% of the circumference of the first opening corresponding to the second sub-pixel.

4. The display substrate according to any one of claims 1 to 3, wherein: The multiple sub-pixels also include a third sub-pixel, and the limiting structure also includes a third limiting structure, the third limiting structure includes a portion of the light-emitting area surrounding the third sub-pixel, the third limiting structure is not exposed by the second opening, or the ratio of the edge length of the portion of the first limiting structure exposed by the second opening to the perimeter of the first opening corresponding to the first sub-pixel is smaller than the ratio of the edge length of the portion of the third limiting structure exposed by the second opening to the perimeter of the first opening corresponding to the third sub-pixel.

5. The display substrate according to claim 4, wherein: The portion of the third limiting structure exposed by the second opening is a non-closed ring structure, and the proportion of the non-closed ring structure to the circumference of the first opening corresponding to the third sub-pixel is 10% to 80%.

6. The display substrate according to claim 4, wherein: The first sub-pixel is a blue sub-pixel, one of the second sub-pixel and the third sub-pixel is a red sub-pixel, and the other of the second sub-pixel and the third sub-pixel is a green sub-pixel.

7. The display substrate according to claim 1, wherein: Each of the at least some of the sub-pixels further comprises a first electrode and a second electrode located on both sides of the light-emitting functional layer in a direction perpendicular to the substrate, the first electrode is located between the light-emitting functional layer and the substrate, and the pixel defining pattern is located on a side of the first electrode away from the substrate; The confining structure is located between the first electrode and the base substrate.

8. The display substrate according to any one of claims 1 to 7, wherein: The pixel defining pattern includes a pixel defining portion surrounding the first opening and the second opening, and in a direction perpendicular to the base substrate, at least a portion of the pixel defining portion does not overlap with the defining structure.

9. The display substrate according to claim 1, wherein: Each of the at least some of the sub-pixels further comprises a first electrode and a second electrode located on both sides of the light-emitting functional layer in a direction perpendicular to the substrate, the first electrode is located between the light-emitting functional layer and the substrate, and the pixel defining pattern is located on a side of the first electrode away from the substrate; The first defining structure is not exposed by the second opening, and a ring width of a ring portion of the first defining structure not covered by the first electrode of the first subpixel is smaller than a ring width of a ring portion of the second defining structure not covered by the first electrode of the second subpixel.

10. The display substrate according to claim 1, wherein: Each of the at least some of the sub-pixels further comprises a first electrode and a second electrode located on both sides of the light-emitting functional layer in a direction perpendicular to the substrate, the first electrode is located between the light-emitting functional layer and the substrate, and the pixel defining pattern is located on a side of the first electrode away from the substrate; The ratio of the edge length of the portion of the first limiting structure exposed by the second opening to the perimeter of the first opening corresponding to the first sub-pixel is smaller than the ratio of the edge length of the portion of the second limiting structure exposed by the second opening to the perimeter of the first opening corresponding to the second sub-pixel. , the ring width of the annular portion of the first limiting structure not covered by the first electrode of the first sub-pixel that has no overlap with the second opening is a first ring width, the ring width of the annular portion that has an overlap with the second opening is a second ring width, and the first ring width is smaller than the second ring width.

11. The display substrate according to any one of claims 1 to 6, wherein: Each of the at least some of the sub-pixels further comprises a first electrode and a second electrode located on both sides of the light-emitting functional layer in a direction perpendicular to the substrate, the first electrode is located between the light-emitting functional layer and the substrate, and the pixel defining pattern is located on a side of the first electrode away from the substrate; The base substrate also includes a second region, the limiting structure includes at least one closed annular limiting structure surrounding the second region, and the light-emitting functional layer and the second electrode are both disconnected at the edge of the annular limiting structure.

12. The display substrate according to claim 11, wherein: The pixel defining pattern includes a pixel defining portion surrounding the first opening and the second opening, and along a direction perpendicular to the base substrate, at least a portion of the annular defining structure does not overlap with the pixel defining portion.

13. The display substrate according to claim 11, wherein: The at least one closed annular limiting structure includes multiple circles of annular limiting structures, and the interval between two adjacent circles of annular limiting structures is not less than 1 micron.

14. The display substrate according to any one of claims 1 to 13, wherein: The limiting structure includes a first isolation layer and a second isolation layer which are stacked, wherein the first isolation layer is located on a side of the second isolation layer away from the base substrate, and an edge of the first isolation layer protrudes relative to an edge of the second isolation layer.

15. The display substrate according to claim 14, wherein: The material of the first isolation layer is different from the material of the second isolation layer. The material of the first isolation layer includes an inorganic non-metallic material or a metal material, and the material of the second isolation layer includes an organic material or an inorganic non-metallic material.

16. The display substrate according to claim 1, wherein: The multiple sub-pixels also include a third sub-pixel, and the multiple sub-pixels are arranged into a plurality of first sub-pixel groups and a plurality of second sub-pixel groups alternately arranged along a first direction, each first sub-pixel group includes the first sub-pixels and the second sub-pixels alternately arranged along a second direction, and each second sub-pixel group includes the third sub-pixel arranged along the second direction, and the first direction intersects with the second direction.

17. The display substrate according to claim 16, wherein: The defining structure further includes a third defining structure, wherein the first defining structure includes a first non-closed ring-shaped isolating portion surrounding the light-emitting area of ​​the first sub-pixel, the second defining structure includes a second non-closed ring-shaped isolating portion surrounding the light-emitting area of ​​the second sub-pixel, and the third defining structure includes a third non-closed ring-shaped isolating portion surrounding the light-emitting area of ​​the third sub-pixel; The shapes of the light-emitting areas of the first sub-pixel, the second sub-pixel and the third sub-pixel are all quadrilaterals, the first isolation portion surrounds two adjacent sides of the light-emitting area of ​​the first sub-pixel and a first corner formed by connecting the two sides, or the first isolation portion surrounds two adjacent sides of the light-emitting area of ​​the first sub-pixel except the first corner formed by connecting the two adjacent sides, the second isolation portion surrounds two adjacent sides of the light-emitting area of ​​the second sub-pixel and a second corner formed by connecting the two sides, the third isolation portion surrounds two adjacent sides of the light-emitting area of ​​the third sub-pixel and a third corner formed by connecting the two sides, and the first corner, the second corner and the third corner have the same orientation.

18. The display substrate according to claim 16, wherein: The second limiting structure includes a non-closed ring-shaped second isolation portion surrounding the light-emitting area of ​​the second sub-pixel; The light-emitting areas of the first sub-pixel, the second sub-pixel and the third sub-pixel are all in the shape of quadrilaterals, and the second isolation portion surrounds four sides of the light-emitting area of ​​the second sub-pixel.

19. The display substrate according to claim 18, wherein: The limiting structure also includes a third limiting structure, which includes a non-closed ring-shaped third isolation portion surrounding the light-emitting area of ​​the third sub-pixel, and the third isolation portion surrounds two sides of the light-emitting area of ​​the third sub-pixel that are adjacent to the light-emitting area of ​​the first sub-pixel.

20. The display substrate according to claim 16, wherein: The second defining structure includes a non-closed ring-shaped second isolating portion surrounding the light-emitting area of ​​the second sub-pixel, and the defining structure further includes a third defining structure, and the third defining structure includes a non-closed ring-shaped third isolating portion surrounding the light-emitting area of ​​the third sub-pixel; The shapes of the light-emitting areas of the first sub-pixel, the second sub-pixel and the third sub-pixel are all quadrilaterals, the second isolation portion surrounds two adjacent sides of the light-emitting area of ​​the second sub-pixel and a second corner formed by the two sides, the third isolation portion surrounds two adjacent sides of the light-emitting area of ​​the third sub-pixel and a third corner formed by the two sides, and the second corner and the third corner have the same orientation.

21. The display substrate according to any one of claims 1 to 20, wherein: At least one film layer of the light-emitting functional layer includes a charge generating layer, and the light-emitting functional layer includes a first light-emitting layer, the charge generating layer and a second light-emitting layer which are stacked, the charge generating layer is located between the first light-emitting layer and the second light-emitting layer, and the charge generating layer is disconnected at the edge of the defined structure.

22. A display substrate, comprising: A substrate base plate, comprising at least a first region; A plurality of sub-pixels are located in the first region, and 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; A pixel defining pattern, located on the base substrate, the pixel defining pattern comprising a plurality of first openings to define a light emitting area of ​​at least part of the sub-pixels; a defining structure, located between the light-emitting functional layer and the substrate, the defining structure including a portion surrounding a light-emitting region of each sub-pixel in the at least some sub-pixels, The pixel defining pattern further includes a second opening, a portion of at least one layer of the light-emitting functional layer located in the first opening is a continuous portion, and at least a portion located in at least one second opening is isolated, and a portion of the defining structure exposed by the second opening is configured to isolate the at least one layer of the light-emitting functional layer. The plurality of sub-pixels include a first sub-pixel and a second sub-pixel, a turn-on voltage of the first sub-pixel is higher than a turn-on voltage of the second sub-pixel, The distance between the edge of the light-emitting area of ​​the first sub-pixel and the second opening closest to the edge of the light-emitting area is a first distance, the distance between the edge of the light-emitting area of ​​the second sub-pixel and the second opening adjacent to the edge of the light-emitting area is a second distance, the first distance is greater than the second distance, or the limiting structure includes a first limiting structure and a second limiting structure, the first limiting structure includes at least a portion surrounding the light-emitting area of ​​the first sub-pixel, the second limiting structure includes at least a portion surrounding the light-emitting area of ​​the second sub-pixel, and the ratio of the edge length of the portion of the first limiting structure exposed by the second opening to the perimeter of the first opening corresponding to the first sub-pixel is less than the ratio of the edge length of the portion of the second limiting structure exposed by the second opening to the perimeter of the first opening corresponding to the second sub-pixel.

23. The display substrate according to claim 22, wherein: The turn-on voltage of the first sub-pixel is 0.1 to 5V higher than the turn-on voltage of the second sub-pixel.

24. The display substrate according to claim 22 or 23, wherein: The plurality of sub-pixels further include a third sub-pixel, the second opening is disposed between the first sub-pixel and the third sub-pixel, the distance between the edge of the light-emitting area of ​​the first sub-pixel and the second opening is a third distance, the distance between the edge of the light-emitting area of ​​the third sub-pixel and the second opening is a fourth distance, and the third distance is greater than the fourth distance; or The limiting structure further includes a third limiting structure, the third limiting structure including a For the portion of the light-emitting area of ​​the sub-pixel, the ratio of the edge length of the portion of the first limiting structure exposed by the second opening to the perimeter of the first opening corresponding to the first sub-pixel is smaller than the ratio of the edge length of the portion of the third limiting structure exposed by the second opening to the perimeter of the first opening corresponding to the third sub-pixel.

25. The display substrate according to any one of claims 22 to 24, wherein: The portion of the second limiting structure exposed by the second opening is a non-closed ring structure, and the non-closed ring structure accounts for 10% to 80% of the circumference of the first opening corresponding to the second sub-pixel.

26. The display substrate according to claim 24, wherein: The portion of the third limiting structure exposed by the second opening is a non-closed ring structure, and the non-closed ring structure accounts for 10% to 80% of the circumference of the first opening corresponding to the third sub-pixel.

27. The display substrate according to any one of claims 22 to 24, wherein: Each of the at least some of the sub-pixels further comprises a first electrode and a second electrode located on both sides of the light-emitting functional layer in a direction perpendicular to the substrate, the first electrode is located between the light-emitting functional layer and the substrate, and the pixel defining pattern is located on a side of the first electrode away from the substrate; The base substrate also includes a second region, the limiting structure includes at least one closed annular limiting structure surrounding the second region, and the light-emitting functional layer and the second electrode are both disconnected at the edge of the annular limiting structure.

28. A display device comprising the display substrate according to any one of claims 1 to 27.

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