Display substrate and display device

Abstract

The application provides a display substrate and a display device. The display substrate comprises: a substrate, which has a tensile region and a plurality of display regions, the plurality of display regions being spaced apart by the tensile region, the tensile region having a first connecting unit connecting two adjacent display regions and a hollow part defined by a plurality of the first connecting unit; and a light emitting element, which is arranged on one side of the substrate, and the tensile region and the display region both have the light emitting element.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to display substrates and display devices. Background Technology

[0002] Currently, flexible display devices that are bendable, foldable, and stretchable are one of the development directions of display technology. However, in related technologies, while the various film layers in a display device, especially the inorganic layers, possess a certain degree of bendability, their stretchability is extremely limited. Direct stretching would cause the inorganic layers, organic layers, and circuit traces in the display device to break or undergo irreversible deformation. Furthermore, if stretchable areas, such as connecting units or cutouts, are incorporated into the display substrate of a flexible display device, it would occupy the display area, resulting in excessively low pixel density and poor display quality.

[0003] Therefore, the existing technologies related to flexible display devices still need to be improved. Summary of the Invention

[0004] This application aims to at least partially solve one of the technical problems in the related art. To this end, one object of this application is to provide a display substrate that can be stretched and deformed, enabling the display device to achieve high pixel density, high uniformity of light emission, or good display effect during display.

[0005] In one aspect of this application, a display substrate is provided. According to an embodiment of this application, the display substrate includes: a substrate having a stretchable region and a plurality of display regions, the plurality of display regions being spaced apart by the stretchable region; the stretchable region having a first connecting unit connecting two adjacent display regions and a cutout defined by a plurality of first connecting units; and a light-emitting element disposed on one side of the substrate, with the light-emitting element present in both the stretchable region and the display regions. This display substrate can be stretched and deformed, and a display device having this display substrate exhibits high pixel density, high uniformity of light emission, and good display effect during display.

[0006] According to an embodiment of this application, the light-emitting element located within the stretching region is disposed on the first connecting unit.

[0007] According to an embodiment of this application, the light-emitting element located within the stretching region is disposed on an island structure within the hollow portion.

[0008] According to an embodiment of this application, a metal trace layer is provided on one side of the substrate. The metal trace layer extends from the display area to the stretching area and is electrically connected to the light-emitting element located in the stretching area. When the light-emitting element is disposed on the first connection unit, the metal trace layer extends to the first connection unit; when the light-emitting element is disposed on the island structure, the metal trace layer extends to the cutout portion.

[0009] According to an embodiment of this application, the display substrate satisfies any one of the following: (1) the metal trace layer is disposed on the surface of the substrate, and a first organic layer is further disposed on the surface of the metal trace layer away from the substrate, wherein a first orthographic projection of the first organic layer on the substrate and a second orthographic projection of the metal trace layer on the substrate have an overlapping area; (2) a first organic layer is disposed on the surface of the metal trace layer away from the substrate, and a second organic layer is disposed on the surface of the metal trace layer close to the substrate, wherein a first orthographic projection of the first organic layer on the substrate, a second orthographic projection of the metal trace layer on the substrate, and a third orthographic projection of the second organic layer on the substrate have an overlapping area.

[0010] According to an embodiment of this application, the display substrate further includes: a second connection unit, the second connection unit connecting the island structure and the display area.

[0011] According to an embodiment of this application, the display substrate further includes: a second connection unit, the second connection unit connecting the island structure and the first connection unit, and the metal trace layer extending along the second connection unit to the island structure and electrically connected to the light-emitting element located on the island structure.

[0012] According to an embodiment of this application, the display area is quadrilateral in shape, and each of the four vertices of the display area is connected to a first connecting unit, and every four first connecting units together define a hollow portion.

[0013] According to an embodiment of this application, the first connecting unit and the second connecting unit each have a bending portion independently.

[0014] According to an embodiment of this application, the first connecting unit and the second connecting unit each independently satisfy at least one of the following conditions: the length is 600μm to 800μm; the number of the bending portions is 1 to 2.

[0015] According to an embodiment of this application, the light-emitting element is at least one of an organic electroluminescent element or a light-emitting diode, and the light-emitting element located in the stretching region is a light-emitting diode.

[0016] In another aspect, this application provides a display device. According to an embodiment of this application, the display device includes the aforementioned display substrate. This display device exhibits high pixel density, high uniformity of light emission, and good display effect during display. Attached Figure Description

[0017] Figure 1 A schematic diagram of the planar structure of a display substrate according to an embodiment of this application is shown.

[0018] Figure 2 A schematic diagram of the planar structure of a display substrate according to another embodiment of this application is shown.

[0019] Figure 3 This shows a schematic diagram of the planar structure of a display substrate according to yet another embodiment of this application.

[0020] Figure 4 This shows a schematic diagram of the planar structure of a display substrate according to another embodiment of the present application.

[0021] Figure 5 This shows a schematic diagram of the planar structure of a display substrate according to another embodiment of the present application.

[0022] Figure 6 This shows a schematic diagram of the planar structure of a display substrate according to another embodiment of the present application.

[0023] Figure 7 This shows a schematic diagram of the planar structure of a display substrate according to another embodiment of the present application.

[0024] Figure 8 This shows a schematic diagram of the planar structure of a display substrate according to another embodiment of the present application.

[0025] Figure 9 This shows a schematic diagram of the planar structure of a display substrate according to another embodiment of the present application.

[0026] Figure 10 This shows a schematic diagram of the planar structure of a display substrate according to another embodiment of the present application.

[0027] Figure 11 This application is shown Figure 3 A cross-sectional view of the display substrate along line AA.

[0028] Figure 12 This application is shown Figure 3 Another cross-sectional view of the display substrate along line AA.

[0029] Figure 13 This application is shown Figure 3 Another cross-sectional view of the display substrate along line AA.

[0030] Figure label:

[0031] 1: Display substrate; 10: Stretching area; 11: First connecting unit; 111: Bending portion; 12: Hollowed-out portion; 122: Island structure; 20: Display area; 21a, 21b: Second connecting unit; 211: Bending portion; 201a, 201b, 201c: Light-emitting element; 301: Substrate; 302: First buffer layer; 303: Second buffer layer; 304: Active layer; 305: First gate; 306: Second gate; 307: Source; 308: First gate insulating layer; 309: Second gate insulating layer; 310: Interlayer insulating layer; 311: Metal trace layer; 312: First organic layer; 313: VSS signal line; 314: Light-emitting element; 315: Second organic layer; 316: Drain; 317: Packaging structure. Detailed Implementation

[0032] The embodiments of this application are described in detail below. The embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0033] In one aspect of this application, a display substrate is provided. According to an embodiment of this application, referring to... Figure 1 The display substrate 1 includes: a substrate having a stretching region 10 and a plurality of display regions 20, wherein the plurality of display regions 20 are spaced apart by the stretching region 10, and the stretching region 10 has a first connecting unit 11 connecting two adjacent display regions 20 and a cutout portion 12 defined by the plurality of first connecting units 11 (see structural schematic diagram). Figure 2The display substrate 1 includes a stretching region 10 and a light-emitting element (not shown in the figure), wherein the light-emitting element is disposed on one side of the substrate, and the light-emitting element is present in both the stretching region 10 and the display region 20. Since the display substrate 1 has a stretching region 10, it can be stretched and deformed. Furthermore, since the display substrate 1 has light-emitting elements not only in the display region 20 but also in the stretching region 10, the display device having the display substrate 1 has high pixel density, high uniformity of light emission, and good display effect. In addition, the cutout portion 12 defined by the first connecting unit 11 and multiple first connecting units 11 allows for the release of strain during stretching of the display substrate 1, thereby enabling the display substrate 1 to achieve better stretchability and deformation.

[0034] According to embodiments of this application, the material of the substrate is not particularly limited. For example, in some embodiments of this application, the material of the substrate may include flexible materials such as polyimide, or may be polyethylene terephthalate, metal, etc. This allows the display substrate 1 to better achieve tensile deformation.

[0035] According to embodiments of this application, the specific shape and quantity of the first connecting unit 11 and the hollow portion 12 in the stretched region are not particularly limited. For example, in some embodiments of this application, refer to... Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 or Figure 10 The display area 20 can be quadrilateral in shape, with each of the four vertices of the display area 20 connected to a first connecting unit 11. Every four first connecting units 11 together define a cutout portion 12. Therefore, the display substrate 1 has better tensile properties. Furthermore, more light-emitting elements can be disposed within the display area 20 and the tensile area 10 of the display substrate 1, thereby further increasing the pixel density and improving the display effect of the display device with the display substrate 1.

[0036] According to embodiments of this application, the specific arrangement of the light-emitting element within the display area can be the conventional arrangement of light-emitting elements within the display area of ​​a display substrate, for example, Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 or Figure 10 The light-emitting element 201a is disposed in the display area 20, which can achieve a better light-emitting effect, thereby making the display substrate 1 have a better display effect.

[0037] According to embodiments of this application, the specific arrangement of the light-emitting element within the stretched area will be further described below with reference to the accompanying drawings:

[0038] First, in some embodiments of this application, reference is made to Figure 3 The light-emitting element 201b located within the stretching region may be disposed on the first connecting unit 11; additionally, in other embodiments of this application, referring to Figure 4 The light-emitting element 201c located within the stretched area can also be an island structure 122 disposed within the hollow portion 12; in some other embodiments of this application, refer to Figure 5 When the light-emitting element 201b is disposed on the first connecting unit 11, the light-emitting element 201c can also be disposed on the island structure 122 within the hollow portion 12. Therefore, the display substrate 1 has a simple and easy-to-implement structure, and can achieve good stretching and deformation. Furthermore, the display device with this display substrate has high pixel density, high uniformity of light emission, and good display effect.

[0039] According to embodiments of this application, more specifically, the specific arrangement of the light-emitting element located within the stretched region is not particularly limited; it can achieve light emission by being electrically connected to the light-emitting element within the display area via a metal trace layer. In some embodiments of this application, reference is made to… Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 or Figure 10 A metal trace layer (not shown in the figure) is provided on one side of the substrate. The metal trace layer extends from the display area 20 to the stretching area and is electrically connected to the light-emitting element located in the stretching area. When the light-emitting element is disposed on the first connection unit 11 (e.g. Figure 3 The light-emitting element 201b in the middle, the metal trace layer extends to the first connection unit 11; when the light-emitting element is disposed on the island structure 122 (e.g., Figure 4The light-emitting element 201c is located in the substrate, and the metal trace layer extends to the hollow portion 12. This arrangement allows the light-emitting element located within the stretched area to emit light more effectively, resulting in a better display effect and significantly increasing the pixel density of the display substrate during display.

[0040] According to an embodiment of this application, the metal trace layer can be specifically disposed on the surface of the substrate 301, with a first organic layer 312 disposed on the surface of the metal trace layer 311 away from the substrate 301. The first orthographic projection of the first organic layer 312 on the substrate 301 overlaps with the second orthographic projection of the metal trace layer 311 on the substrate 301 (see schematic diagram). Figure 12 It should be noted that in this article... Figure 11 , Figure 12 and Figure 13 All along Figure 3 The schematic diagram of the cross-sectional structure of the AA line in the display substrate shown will not be repeated later; in addition, in some other embodiments of this application, refer to Figure 11 and Figure 13 A first organic layer 312 is disposed on the surface of the metal wiring layer 311 away from the substrate 301, and a second organic layer 315 is disposed on the surface of the metal wiring layer 311 close to the substrate 301. The first orthographic projection of the first organic layer 312 on the substrate 301, the second orthographic projection of the metal wiring layer 311 on the substrate 301, and the third orthographic projection of the second organic layer 315 on the substrate 301 have an overlapping area, so that the metal wiring layer 311 is not connected to the inorganic layer in the display substrate. As a result, when the display substrate is stretched, the metal wiring layer 311 will not generate large strain and is not easy to break. Thus, after the display substrate is stretched, the light-emitting elements in the stretched area can still have a good display effect.

[0041] According to embodiments of this application, it can be understood that the compensation circuit of the light-emitting element located within the stretching region and the thin-film transistor controlling its light emission can be disposed within the display area 20 (see schematic diagram). Figure 12 Alternatively, it can be located within the first connecting unit 11 (see structural schematic diagram). Figure 11Alternatively, it can be located on the island structure, which can be configured according to actual needs, and will not be elaborated further here. As mentioned earlier, when the compensation circuit for controlling the light-emitting element located in the stretching region and the thin-film transistor are located in the display region, the metal trace layer is extended from the display region 20 to the stretching region and electrically connected to the light-emitting element located in the stretching region. When the light-emitting element is located on the first connection unit 11, the metal trace layer extends to the first connection unit 11 (see structural schematic diagram). Figure 12 When the light-emitting element is disposed on the island structure, the metal trace layer extends to the hollow portion, thereby enabling the light-emitting element located in the stretching area to emit light more effectively.

[0042] According to the embodiments of this application, it can be understood that the specific manner in which the metal trace layer extends from the display area 20 into the stretched area and is electrically connected to the light-emitting element located within the stretched area is not particularly limited; it can be a direct connection (see structural schematic diagram). Figure 11 and Figure 13 Alternatively, it can be connected via through holes (see structural diagram). Figure 12 (This will not be elaborated further here.)

[0043] According to embodiments of this application, further, referring to Figure 4 and Figure 5 The display substrate may further include: a second connection unit 21a, the second connection unit 21a connecting the island structure 122 and the display area 20; in other embodiments of this application, further referring to... Figure 6 The display substrate may further include a second connecting unit 21b, which connects the island structure 122 and the first connecting unit 11. The metal trace layer extends along the second connecting unit 21b to the island structure 122 and is electrically connected to the light-emitting element located on the island structure 122. Therefore, the display substrate has a simple and easy-to-implement structure. Furthermore, the second connecting unit 21a or the second connecting unit 21b allows for better stretching and deformation. Simultaneously, the light-emitting element located within the cutout portion 12 can emit light effectively, resulting in a display device with this substrate exhibiting high pixel density, high uniformity of light emission, and excellent display performance.

[0044] According to embodiments of this application, the number of second connection units and their specific connection methods are not particularly limited. For example, in some embodiments of this application, referring to... Figure 7The number of second connection units connected to one of the island structures 122 may be two, wherein one second connection unit 21b is connected to the first connection unit 11, and the other second connection unit is connected to the display area 20; in other embodiments of this application, refer to Figure 8 Alternatively, the number of second connection units connected to one of the island structures 122 may be four, with all four second connection units 21b connected to the first connection unit; in some other embodiments of this application, refer to Figure 9 Alternatively, the number of the second connection units connected to one of the island structures 122 may be four, and all four second connection units may be connected to the display area 20; furthermore, in some embodiments of this application, referring to Figure 10 Alternatively, the number of second connecting units connected to one of the island structures can be four, wherein two second connecting units 21b are connected to the first connecting unit 11, and the other two second connecting units are connected to the display area 20. Thus, through the different specific arrangements of the second connecting units described above, the structure of the display substrate can be simplified and easily implemented, allowing for better stretching and deformation. Simultaneously, the light-emitting elements located within the hollow portion 12 can emit light effectively, resulting in a higher pixel density, higher uniformity of light emission, and better display effect in the display device with this display substrate.

[0045] According to embodiments of this application, the first connecting unit and the second connecting unit may also each have an independent bending portion. For example, in some embodiments of this application, referring to... Figure 4 The first connecting unit 11 also has a bending portion 111; in addition, the second connecting unit 21a also has a bending portion 211. As a result, the tensile properties at the bending portions are better, which in turn makes the tensile properties of the display substrate better.

[0046] According to embodiments of this application, further, referring to Figure 4 The lengths L1 of the first connecting unit and L2 of the second connecting unit can each be independently 600 μm to 800 μm. Specifically, in some embodiments of this application, the lengths L1 of the first connecting unit and L2 of the second connecting unit can each be independently 600 μm, 650 μm, 700 μm, 750 μm, or 800 μm, etc. Therefore, the lengths L1 of the first connecting unit and L2 of the second connecting unit are more suitable, resulting in better tensile performance at the bending portion, thereby further improving the tensile performance of the display substrate.

[0047] According to embodiments of this application, the number of bends on the first connecting unit and the second connecting unit is not particularly limited. Specifically, in some embodiments of this application, the number of bends on the first connecting unit and the second connecting unit can each be independently one to two. Therefore, the number of bends on the first connecting unit and the second connecting unit is more suitable, thereby further improving the tensile properties of the display substrate.

[0048] According to embodiments of this application, the specific type of the light-emitting element is not particularly limited. For example, the light-emitting element on the display substrate described in this application can be an organic electroluminescent element or a light-emitting diode. Furthermore, when the light-emitting element located within the stretching region is a light-emitting diode, since it does not require a packaging structure, the strain generated during stretching is lower, resulting in a larger stretching amount, while also preventing damage to the light-emitting element, thereby further improving the display effect within the stretching region. For example, in some embodiments of the present invention, referring to… Figure 13 The light-emitting element 314 located in the display area 20 is an organic electroluminescent element, and the light-emitting element 314 located in the first connecting unit 11 in the stretching area is a light-emitting diode. The specific structures of the organic electroluminescent element and the light-emitting diode can be the specific structures of conventional organic electroluminescent elements or light-emitting diodes in related technologies, which will not be described in detail here.

[0049] Specifically, in some embodiments of this application, reference is made to Figure 11 , Figure 12 and Figure 13 The display substrate may also include structures found in conventional display substrates, such as a first buffer layer 302, a second buffer layer 303, an active layer 304, a first gate 305, a second gate 306, a source 307, a first gate insulating layer 308, a second gate insulating layer 309, an interlayer insulating layer 310, a VSS signal line 313, and a drain 316. When the light-emitting element 314 is an organic electroluminescent element, it is understood that the display substrate may also include a packaging structure 317 (see schematic diagram). Figure 13 The specific configuration of each of the above structures can be the same as that of the structure in the related technology, and will not be elaborated further here.

[0050] According to the embodiments of this application, it can be understood that when the light-emitting element 314 is an organic electroluminescent element, it may also include the specific structure of a conventional organic electroluminescent element, such as a cathode, an anode, a light-emitting layer, a pixel defining layer, etc., and its specific structure is the same as that of a conventional organic electroluminescent element, which will not be described in detail here.

[0051] According to the embodiments of this application, it can be understood that when the light-emitting element 314 is a light-emitting diode, it may also include the specific structure of a conventional light-emitting diode, which will not be described in detail here.

[0052] According to the embodiments of this application, it can be understood that, in the various film layers described above, the inorganic layer material can be a single or multiple inorganic layer such as silicon oxide, silicon nitride, or silicon oxynitride; the active layer material can be an inorganic semiconductor material, such as amorphous silicon or polycrystalline silicon; or it can be an organic semiconductor material; or it can be an oxide semiconductor material such as Zn, In, or Ga; the metal wiring layer, and the source, drain, and other metal leads material can be conductive metals such as Ti, Al, Mo, or Ag, or it can be conductive oxides such as ITO, IZO, ZnO, In2O3, IGO, or AZO. Of course, it can also be a highly ductile conductive material such as rubber mixed with conductive particles, such as carbon nanotubes or silver nanowires; the first organic layer and the second organic layer material can be polymers of polymethyl methacrylate and polystyrene, polymer derivatives of phenol groups, polymers of acrylic, polymers of p-xylene, polymers of aromatic ethers, polymers of amides, polymers of fluorides, polymers of p-xylene, polymers of vinyl alcohol, and mixtures of the above polymers. Therefore, the materials are widely available and readily available, and the cost is low.

[0053] According to the embodiments of this application, it can be understood that when the light-emitting element 314 is an organic electroluminescent element, the materials of the anode and cathode can be conductive metals such as Ti, Al, Mo, or Ag, or conductive oxides such as ITO, IZO, ZnO, In2O3, IGO, or AZO; the material of the pixel defining layer can be a polymer of polymethyl methacrylate and polystyrene, a polymer derivative of phenolic groups, a polymer of acrylic, a polymer of p-xylene, a polymer of aromatic ethers, a polymer of amides, a polymer of fluorides, a polymer of p-xylene, a polymer of vinyl alcohol, and mixtures of the above polymers, etc.; The material of the layer can be phosphorescent or fluorescent luminescent material; the encapsulation structure can be an inorganic-organic-inorganic stacked encapsulation structure or an inorganic encapsulation structure. The inorganic material can be a single or multiple inorganic layer such as silicon oxide, silicon nitride, or silicon oxynitride, or a dense film layer such as aluminum oxide, aluminum nitride, or titanium nitride. The organic material can be polymethyl methacrylate, polycarbonate, acrylic, epoxy resin, etc., which can be patterned by inkjet printing, patterning process, etc. The patterning process can be a coating process or a photolithography process, which can be the same as the process in the relevant technology, and will not be elaborated further here.

[0054] According to the embodiments of this application, it can be understood that during the fabrication of the display substrate, a protective film layer can be attached to the substrate using OCA adhesive. The material of the protective film layer can be dimethylsiloxane, polyimide, polyethylene terephthalate, etc., which will not be elaborated further here. Thus, the materials are widely available, readily available, and have low cost.

[0055] In another aspect, this application provides a display device. According to an embodiment of this application, the display device includes the aforementioned display substrate. This display device exhibits high pixel density, high uniformity of light emission, and good display effect during display.

[0056] According to the embodiments of this application, in addition to the display substrate described above, the display device may also include other necessary structures and components. Those skilled in the art can supplement and design according to the specific type and usage requirements of the display device, which will not be elaborated further here.

[0057] According to embodiments of this application, the specific type of display device is not particularly limited, such as including but not limited to mobile phones, tablets, wearable devices, game consoles, televisions, or vehicle displays.

[0058] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A display substrate, characterized in that, include: A substrate having a stretchable region and a plurality of display regions, wherein the plurality of display regions are spaced apart by the stretchable region, and the stretchable region has a first connecting unit connecting two adjacent display regions and a cutout defined by a plurality of the first connecting units; and A light-emitting element is disposed on one side of the substrate, and the light-emitting element is present in both the stretching region and the display region; A metal trace layer is provided on one side of the substrate. The openwork section contains an island-like structure; The light-emitting element located within the stretching area is disposed on the island structure within the hollow portion; The light-emitting element located within the stretching area is disposed on the first connecting unit; Includes: a second connection unit, the second connection unit connecting the island structure and the display area; The second connection unit connects the island structure and the first connection unit, and the metal trace layer extends along the second connection unit to the island structure and is electrically connected to the light-emitting element located on the island structure; The island structure connects multiple second connection units.

2. The display substrate according to claim 1, characterized in that, The metal trace layer extends from the display area into the stretched area and is electrically connected to the light-emitting element located within the stretched area. When the light-emitting element is disposed on the first connection unit, the metal trace layer extends to the first connection unit; When the light-emitting element is disposed on the island structure, the metal trace layer extends to the hollow portion.

3. The display substrate according to claim 2, characterized in that, Satisfy any of the following: (1) The metal trace layer is disposed on the surface of the substrate, and a first organic layer is also disposed on the surface of the metal trace layer away from the substrate. The first orthographic projection of the first organic layer on the substrate and the second orthographic projection of the metal trace layer on the substrate have an overlapping area. (2) A first organic layer is disposed on the surface of the metal trace layer away from the substrate, and a second organic layer is disposed on the surface of the metal trace layer close to the substrate. The first orthographic projection of the first organic layer on the substrate, the second orthographic projection of the metal trace layer on the substrate, and the third orthographic projection of the second organic layer on the substrate have an overlapping area.

4. The display substrate according to claim 1, wherein the display area is quadrilateral in shape, and each of the four vertices of the display area is connected to a first connecting unit, and every four first connecting units together define a cutout portion.

5. The display substrate according to claim 1, characterized in that, The first connecting unit and the second connecting unit each have an independent bending portion.

6. The display substrate according to claim 5, characterized in that, The first connection unit and the second connection unit each independently satisfy at least one of the following conditions: The length is 600μm to 800μm; The number of the bent portions is 1 to 2.

7. The display substrate according to claim 1, characterized in that, The light-emitting element is at least one of an organic electroluminescent element or a light-emitting diode, and the light-emitting element located in the stretching region is a light-emitting diode.

8. A display device, characterized in that, The display substrate includes any one of claims 1 to 7.

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