Stretchable display substrate and display device

Abstract

The application provides a stretchable display substrate and a display device. The stretchable display substrate comprises a substrate, a plurality of display units and a plurality of connecting tracks. A plurality of aperture patterns are distributed on the substrate, and a plurality of bridges capable of surrounding islands are formed between at least some adjacent aperture patterns in the plurality of aperture patterns. At least one display unit is arranged on each island. A plurality of connecting tracks are respectively connected between the display units on the islands and are arranged on the plurality of bridges. The edges of at least some aperture patterns are provided with flexible blocking structures on the substrate, and the flexible blocking structures comprise at least one flexible film layer. The stretchable display substrate has the flexible blocking structures with at least one flexible film layer on the edges of the aperture patterns, which is conducive to reducing the strain of the inorganic film layer when the screen is stretched and ensuring the display effect of the flexible stretchable display in repeated stretching.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of line recognition, in particular to a stretchable display substrate and a display device. BACKGROUND

[0002] Flexible display panels have attracted more and more attention due to their advantages such as foldability, convenient portability and wide application range, especially stretchable display panels, which bring users a brand-new viewing and using experience. However, the stretchability of the existing stretchable display panels cannot meet the needs of people, which limits the application of stretchable flexible display panels. SUMMARY

[0003] According to a first aspect of the embodiments of the present application, a stretchable display substrate is provided, which comprises:

[0004] A substrate substrate, wherein a plurality of aperture patterns are distributed on the substrate substrate, and a plurality of bridges capable of enclosing islands are formed between at least part of adjacent aperture patterns in the plurality of aperture patterns.

[0005] A plurality of display units, at least one display unit is arranged on each island.

[0006] A plurality of connection wires are respectively connected between the plurality of display units on the islands and are respectively arranged on the plurality of bridges.

[0007] At least part of the edges of the aperture patterns are provided with a flexible barrier structure on the substrate substrate, and the flexible barrier structure comprises at least one flexible film layer.

[0008] In some embodiments, the flexible barrier structure comprises a first flexible film layer above the substrate substrate.

[0009] In some embodiments, the display unit comprises an encapsulation layer, the encapsulation layer comprises an organic encapsulation layer, and the first flexible film layer and the organic encapsulation layer are of the same layer and the same material.

[0010] In some embodiments, the material of the first flexible film layer and the organic encapsulation layer comprises optical adhesive material.

[0011] In some embodiments, the encapsulation layer further comprises a first inorganic encapsulation layer and a second inorganic encapsulation layer on opposite surfaces of the organic encapsulation layer, and the flexible barrier structure further comprises a first inorganic layer and a second inorganic layer on opposite surfaces of the first flexible film layer, the first inorganic layer and the first inorganic encapsulation layer are of the same layer and the same material, and the second inorganic layer and the second inorganic encapsulation layer are of the same layer and the same material.

[0012] In some embodiments, the flexible barrier structure includes a second flexible membrane layer positioned between the first flexible membrane layer and the base substrate.

[0013] In some embodiments, the display unit has a driving circuit layer, a light-emitting layer, and a spacer layer sequentially arranged between the base substrate and the encapsulation layer, the driving circuit layer and the light-emitting layer both include organic layers, and the second flexible film layer is made of the same layer and material as the organic layer of the driving circuit layer, the organic layer in the light-emitting layer, and at least one layer of the spacer layer.

[0014] In some embodiments, the organic layer of the driving circuit layer includes a first planarization layer and a second planarization layer, the light-emitting layer includes a pixel defining layer, and the second flexible membrane layer is the same layer and material as at least one of the first planarization layer, the second planarization layer, the pixel defining layer, and the spacer layer.

[0015] In some embodiments, the base substrate has a groove located outside the opening pattern and penetrating part of the thickness of the base substrate, the groove opening faces the side where the flexible blocking structure is located and is opposite to the flexible blocking structure, and a third flexible film layer is provided in the groove.

[0016] In some embodiments, the flexible barrier structure has a barrier sidewall on a side close to the opening pattern, the opening pattern has an opening sidewall, and the barrier sidewall is flush with the opening sidewall.

[0017] In some embodiments, the flexible blocking structure has a blocking sidewall close to the hole pattern, the hole pattern has a hole sidewall, and the blocking sidewall is retracted toward the side away from the hole pattern to form a notch portion located at the edge of the hole pattern.

[0018] In some embodiments, the indentation size of the notch is 2 μm-10 μm.

[0019] According to a second aspect of an embodiment of the present application, a display device is provided, comprising the stretchable display substrate as described above.

[0020] The main technical effects achieved by the embodiments of the present application are:

[0021] The stretchable display substrate provided in the embodiment of the present application is beneficial to reducing the strain of the inorganic film layer when the screen is stretched, thereby ensuring the display effect of the flexible stretchable display during repeated stretching, by arranging a flexible barrier structure having at least one flexible film layer located on the base substrate at the edge of the opening pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A display device provided by an exemplary embodiment of the present application;

[0023] Figure 2 is a top view of a stretchable display substrate provided by an exemplary embodiment of the present application;

[0024] Figure 3 An exemplary embodiment of the present application provides a stretchable display substrate. Figure 2 The schematic diagram of the cross-section structure at AA is shown;

[0025] Figure 4 is a schematic diagram of a partial cross-sectional structure of another stretchable display substrate provided by an exemplary embodiment of the present application;

[0026] Figure 5 is a schematic diagram of a partial cross-sectional structure of another stretchable display substrate provided by an exemplary embodiment of the present application;

[0027] Figure 6 is a schematic diagram of a partial cross-sectional structure of another stretchable display substrate provided by an exemplary embodiment of the present application;

[0028] Figure 7 is a schematic diagram of a partial cross-sectional structure of another stretchable display substrate provided by an exemplary embodiment of the present application;

[0029] Figure 8 is a schematic diagram of a partial cross-sectional structure of another stretchable display substrate provided by an exemplary embodiment of the present application;

[0030] Figure 9 is a schematic diagram of a partial cross-sectional structure of another stretchable display substrate provided by an exemplary embodiment of the present application;

[0031] Figure 10 is a schematic diagram of a partial cross-sectional structure of another stretchable display substrate provided by an exemplary embodiment of the present application;

[0032] Figure 11 This is a partial cross-sectional structural diagram of another stretchable display substrate provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0034] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0035] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0036] The embodiment of the present application provides a stretchable display substrate and a display device. The stretchable display substrate includes a base substrate, a plurality of display units, and a plurality of connecting wires; a plurality of opening patterns are distributed on the base substrate, and a plurality of bridges capable of enclosing an island are formed between at least some adjacent opening patterns in the plurality of opening patterns; at least one display unit is arranged on each of the islands; a plurality of connecting wires are respectively connected between the plurality of display units on the islands, and are respectively arranged on the plurality of bridges; at least some of the edges of the opening patterns are provided with a flexible blocking structure located on the base substrate, and the flexible blocking structure includes at least one flexible film layer. The above-mentioned stretchable display substrate, by providing a flexible blocking structure having at least one flexible film layer located on the base substrate at the edge of the opening pattern, is conducive to reducing the strain of the inorganic film layer when the screen is stretched, thereby ensuring the display effect of the flexible stretchable display during repeated stretching.

[0037] The following is combined with Figures 1 to 11 , the stretchable display substrate and the display device in the embodiments of the present application are described in detail. In the absence of conflict, the features of the following embodiments can complement or be combined with each other.

[0038] Please refer to Figure 1 and, if necessary, combine Figures 2 to 11 As shown, a display device 100 includes a stretchable display substrate 20 ′.

[0039] The display device 100 may further include a housing 10 ′, and the stretchable display substrate 20 ′ may be embedded in the housing 10 ′.

[0040] Please combine Figure 2 、 Figure 3 and Figure 11As shown, in some embodiments, the stretchable display substrate 20' includes a base substrate 10, a display unit 1003, and a plurality of connecting wires. A plurality of opening patterns 110 are distributed on the base substrate 10, and a plurality of bridges 130 are formed between at least some adjacent opening patterns 110 in the plurality of opening patterns 110 to enclose an island 120. One or more display units 1003 are provided on each of the islands 120. A plurality of connecting wires are respectively connected between the plurality of display units 1003 on the islands 120 and are respectively provided on the plurality of bridges 130. A flexible barrier structure 1001 located on the base substrate 10 is provided at the edge of at least some of the opening patterns 110, and the flexible barrier structure 1001 includes at least one flexible film layer.

[0041] The connection wiring mentioned here can be understood as source and drain wiring, gate wiring, etc. that can be connected to the display unit 1003.

[0042] The opening pattern 110 mentioned here is a pattern-shaped opening structure composed of horizontally extending openings and vertically extending openings opened at preset positions.

[0043] The display unit 1003 mentioned here can be understood as a pixel unit or a sub-pixel unit and its corresponding driving circuit structure (or corresponding thin film transistor).

[0044] Please combine Figure 3 As shown, in some embodiments, the flexible barrier structure 1001 includes a first flexible membrane layer 102 located on the base substrate 10 .

[0045] Please combine Figure 3 and Figure 11 As shown, in this embodiment, the display unit 1003 includes a driving circuit layer 301, a light-emitting layer 201, a spacer layer 401, and an encapsulation layer 501, which are sequentially disposed between the base substrate 10 and the encapsulation layer. The encapsulation layer 501 includes an organic encapsulation layer 80, and the first flexible film layer 102 and the organic encapsulation layer 80 are made of the same layer and material, i.e., both are formed in the same manufacturing process.

[0046] In some embodiments, the first flexible film layer 102 and the organic encapsulation layer 80 are made of an optical adhesive material (i.e., a photosensitive material that can be patterned using a photolithography process). Accordingly, the first flexible film layer 102 and the organic encapsulation layer 80 can be formed using a photolithography process, which helps save manufacturing processes.

[0047] Compared with the related art method of forming an organic encapsulation layer using technologies such as inkjet printing, the use of optical adhesive materials enables the organic encapsulation layer and the first flexible film layer 102 to achieve a more refined pattern and higher etching accuracy, which is particularly beneficial for the precise etching of the first flexible film layer 102 at the outer edge of the opening pattern.

[0048] In some embodiments, please continue to combine Figure 2 and Figure 11 As shown, the encapsulation layer also includes two opposite surfaces of the organic encapsulation layer 80 (ie Figure 11 The flexible barrier structure 1001 further includes a first inorganic encapsulation layer 70 and a second inorganic encapsulation layer 80 located on the two opposite surfaces of the first flexible film layer 102 (i.e. Figure 2 The first inorganic layer 104 and the second inorganic layer 105 (on the upper and lower surfaces) can be the same layer and made of the same material as the first inorganic encapsulation layer 70, and the second inorganic layer 105 can be the same layer and made of the same material as the second inorganic encapsulation layer 80. In other words, the first inorganic layer 104 can be the same layer and made of the same material as the first inorganic encapsulation layer 70, and the second inorganic layer 105 can be the same layer and made of the same material as the second inorganic encapsulation layer 80.

[0049] Of course, in some other embodiments, the first flexible film layer may be a different layer but made of the same material as the first organic encapsulation layer 80. The first inorganic layer 104 may be a different layer but made of the same material as the first inorganic encapsulation layer 70, and the second inorganic layer 105 may be a different layer but made of the same material as the second inorganic encapsulation layer 80.

[0050] The driver circuit layer 301 includes a pixel driver circuit for driving the light-emitting structure. The pixel circuit includes a thin-film transistor 3001. The thin-film transistor 3001 includes an active layer 311, a gate electrode 312 located on the side of the active layer 311 facing away from the substrate 10, a first electrode 313, and a second electrode 314. One of the first electrode 313 and the second electrode 314 is a source electrode, and the other is a drain electrode. The pixel driver circuit may also include a capacitor (not shown).

[0051] The driving circuit layer also includes a gate insulating layer 316, an interlayer insulating layer 315, a first planarization layer 30, a signal routing layer 317, a second planarization layer 40, a first passivation layer 50, and a second passivation layer 60. The gate insulating layer 316 covers the active layer 311. The interlayer insulating layer 315 is located on the side of the gate electrode 312 facing away from the substrate 10. The first electrode 313 and the second electrode 314 are electrically connected to the active layer 311 via vias penetrating the gate insulating layer 316 and the interlayer insulating layer 315. The first planarization layer 30 is located on the side of the first electrode 313 and the second electrode 314 facing away from the substrate 10, covering the exposed interlayer insulating layer 315. The signal routing layer 317 is located on the side of the first planarization layer 30 facing away from the substrate 10. The second planarization layer 40 covers the signal routing layer 317 and the exposed first planarization layer 30. The first passivation layer 50 and the second passivation layer 60 are sequentially located on the second planarization layer 40. Part of the first passivation layer 50 and the second passivation layer 60 may further have through holes penetrating the upper and lower surfaces to achieve functions such as exhaust.

[0052] In one embodiment, the light-emitting layer 201 includes a plurality of light-emitting structures 2001 arranged at intervals. Each light-emitting structure 2001 in the light-emitting layer 201 can emit the same color. For example, each light-emitting structure 2001 in the light-emitting layer 201 can emit blue light. Light of the same color emitted by the light-emitting layer 201 is converted into light of multiple colors when passing through the color conversion layer, thereby achieving color display on the display panel.

[0053] In one embodiment, the light-emitting structure 2001 is located on the side of the second planarization layer 40 facing away from the base substrate 10. The light-emitting structure 2001 includes a first electrode 21, an organic light-emitting material layer 22 located on the side of the first electrode 21 facing away from the base substrate 10, and a second electrode 23 located on the side of the organic light-emitting material layer 22 facing away from the base substrate 10. The first electrode 21 and the second electrode 23 are respectively in direct contact with the organic light-emitting material layer 22. The first electrode 21 can be an anode, and the second electrode 23 can be a cathode. The second electrode 23 of each light-emitting structure 2001 can be a continuous, entire electrode. The first electrode 21 is electrically connected to the first electrode 313 of the thin-film transistor 3001 via a through hole penetrating the second planarization layer 40, the first passivation layer 50, and the second passivation layer 60.

[0054] Here, the spacer layer 401 may be correspondingly disposed on the pixel defining layer 24 .

[0055] In addition, a buffer layer 20 may be further disposed between the base substrate 10 and the driving circuit layer 301 to better isolate the driving circuit layer 301 from the base substrate 10 .

[0056] Please continue to combine Figure 3 and Figure 11As shown, in some embodiments, the flexible barrier structure 1001 includes a second flexible membrane layer 101 located between the first flexible membrane layer 102 and the base substrate 10 .

[0057] In some embodiments, the driving circuit layer 301 and the light-emitting layer 201 both include organic layers, and the second flexible film layer 101 is made of the same layer and material as the organic layer of the driving circuit layer 301 , the organic layer in the light-emitting layer 201 , and at least one of the spacer layer 401 .

[0058] It is understood that the second flexible film layer 101 can be formed as a single organic layer or as a stack of multiple organic layers. Accordingly, the second flexible film layer 101 is formed of the same layer and material as the organic layer of the drive circuit layer 301, the organic layer of the light-emitting layer 201, and at least one layer of the spacer layer 401. It is understood that the second flexible film layer 101 can be formed of the same layer and material as the organic layer of the drive circuit layer 301, the organic layer of the light-emitting layer 201, and one organic layer of the spacer layer 401. Alternatively, when forming the organic layer of the drive circuit layer 301, the organic layer of the light-emitting layer 201, and the multiple organic layers of the spacer layer 401, multiple organic layers can be formed correspondingly at the outer edge of the opening pattern, ultimately forming an organic film layer having multiple stacked organic layers.

[0059] For example, please continue to combine Figure 3 and Figure 11 As shown, in some embodiments, the organic layer of the driving circuit layer 301 includes a first planarization layer 30 and a second planarization layer 40, the light-emitting layer 201 includes a pixel defining layer 24, and the second flexible membrane layer 101 is the same layer and the same material as at least one of the first planarization layer 30, the second planarization layer 40, the pixel defining layer 24 and the spacer layer 401.

[0060] It is understandable that, in some other embodiments, the second organic film layer may also be formed by other organic film layers of the light-emitting unit.

[0061] Please continue to combine Figure 3 As shown, in some embodiments, the flexible blocking structure 1001 has a blocking sidewall a on a side close to the opening pattern 110, and the opening pattern 110 has an opening sidewall b, and the blocking sidewall a is flush with the opening sidewall b.

[0062] Of course, in order to further reduce the influence caused by the stretching of the base substrate, the barrier sidewall a of the flexible barrier structure 1001 close to the opening pattern 110 can be set to be retracted toward the side away from the opening pattern 110 .

[0063] For example, please combine Figure 4In some embodiments, the blocking side wall a is inwardly recessed towards the side away from the aperture pattern 110, forming a notch part 1002 at the edge of the aperture pattern 110.

[0064] The inventors have found through a large number of experiments that, in some embodiments, the recessed size d of the notch part 1002 is preferably 2-10 μm, and the blocking effect is better. That is, the size of the blocking side wall a that is inwardly recessed towards the side away from the aperture pattern 110 is preferably 2-10 μm, and the blocking effect is better.

[0065] Based on the above description, Figure 3 and Figure 4 the stretchable display substrate or the like Figure 3 and Figure 4 The stretchable display substrate shown in the embodiment has a manufacturing process as follows: first, a substrate 10 without an aperture is provided. Then, a buffer layer 20, an active layer 311, a gate insulating layer 316, a gate electrode 312, an interlayer insulating layer 315, a first electrode 313 and a second electrode 314, a first planarization layer 30, a signal trace layer 317, a second planarization layer 40, a first passivation layer 50, a second passivation layer 60, a first electrode 21, a pixel definition layer 24, a spacer layer 401, an organic light-emitting material layer 22, a second electrode 23, a first inorganic encapsulation layer 70, an organic encapsulation layer 80, a second organic encapsulation layer 90, etc. are sequentially formed on the substrate 10. Then, an aperture pattern 110 is formed at a predetermined position on the substrate 10.

[0066] In some embodiments, the second flexible film layer 101 can be formed when one or more of the first planarization layer 30, the second planarization layer 40, the pixel definition layer 24, and the spacer layer 401 are formed. The first flexible film layer 102 is formed in the process of forming the organic encapsulation layer 80. The first inorganic layer 104 and the second inorganic layer 105 can be formed respectively when the first inorganic encapsulation layer 70 and the second organic encapsulation layer 90 are formed.

[0067] In some other embodiments, the flexible blocking structure 1001 can not include the second flexible film layer 101. Please refer to Figure 5 and Figure 11 shown in the embodiment, Figure 5 the stretchable display substrate shown in the embodiment is similar to the above Figure 3 the stretchable display substrate shown in the embodiment is similar to the above Figure 5 the stretchable display substrate shown in the embodiment is similar to the above

[0068] Please refer to Figure 6 shown in the embodiment and Figure 11 shown in the embodiment, in some other embodiments, the stretchable display substrate shown in the embodiment is similar to the above Figure 4 the stretchable display substrate shown in the embodiment is similar to the above Figure 3The difference between the embodiments shown is that Figure 6 The stretchable flexible substrate shown is compared to Figure 5 As for the stretchable flexible substrate shown, its blocking side wall a is retracted toward the side away from the opening pattern 110 to form a notch portion 1002 located at the edge of the opening pattern 110 .

[0069] Correspondingly, the inward shrinkage of the notch 1002 may also be 2 μm-10 μm, which also has a better blocking effect. That is, the inward shrinkage of the blocking sidewall a toward the side away from the opening pattern 110 is 2 μm-10 μm, which has a better blocking effect.

[0070] Based on the above description, Figure 5 and Figure 6 The stretchable display substrate shown or similar Figure 7 and Figure 8 The preparation process of the stretchable display substrate shown is compared with Figure 3 and Figure 4 The preparation process of the stretchable display substrate shown omits the preparation of the second flexible film layer.

[0071] In other embodiments, in addition to the first flexible film layer 102 and the second flexible film layer 101 , the stretchable flexible substrate may further include a third flexible film layer located in the base substrate 10 to further reduce the transmission of stress in the opening pattern 110 region.

[0072] For example, please combine Figure 7 and Figure 11 As shown, the base substrate 10 has a groove located outside the opening pattern 110 and penetrating part of the thickness of the base substrate 10, the groove opening faces the side where the flexible blocking structure 1001 is located and is opposite to the flexible blocking structure 1001, and a third flexible membrane layer 103 is provided in the groove.

[0073] The third flexible film layer 103 may be made of an organic material.

[0074] The third flexible film layer 103 should actually be formed before the first flexible film layer, the second flexible film layer and each film layer of the display unit are formed.

[0075] Please combine Figure 8 As shown, in other embodiments, for a stretchable display substrate having a third flexible film layer 103, its flexible barrier structure 1001 can also be retracted. The same or similar structures can refer to the above related descriptions. Figure 9 and Figure 11As shown, in some other embodiments, for the base substrate 10 without the second flexible film layer 101, a corresponding third flexible film layer 103 can also be provided in the base substrate 10. For other similarities or differences, please refer to the above description. Figure 10 As shown, in some further embodiments, compared to Figure 9 For the stretchable display substrate shown, the flexible barrier structure can also be retracted. The same or similar structures can refer to the above description.

[0076] Based on the above description, Figure 7 and Figure 8 The stretchable display substrate shown or similar Figure 7 and Figure 8 The preparation process of the stretchable display substrate shown is compared with Figure 3 and Figure 4 In the preparation process of the stretchable display substrate shown, before forming the buffer layer 20 on the base substrate 10, a groove penetrating part of the thickness of the base substrate 10 can be formed on the surface of the base substrate 10 by etching or mechanical punching at the periphery of the preset opening position of the opening pattern, and a flexible material (such as an organic material) is filled in the groove to form a third flexible film layer 103.

[0077] The display device 100 in this embodiment can be any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a laptop computer, a digital photo frame, or a navigator.

[0078] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0079] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0080] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A stretchable display substrate, characterized in that: The stretchable display substrate comprises: A base substrate, wherein a plurality of opening patterns are distributed on the base substrate, wherein a plurality of bridges capable of enclosing islands are formed between at least some adjacent opening patterns in the plurality of opening patterns; a plurality of display units, at least one display unit being arranged on each of the islands; a plurality of connection lines, respectively connected between the plurality of display units on the island and respectively arranged on the plurality of bridges; At least a portion of the edges of the opening pattern are provided with a flexible barrier structure located on the substrate, wherein the flexible barrier structure includes at least one flexible film layer; The base substrate has a groove located outside the opening pattern and penetrating part of the thickness of the base substrate. The groove opens toward the side where the flexible blocking structure is located and is opposite to the flexible blocking structure. A third flexible film layer is provided in the groove.

2. The stretchable display substrate according to claim 1, wherein: The flexible barrier structure includes a first flexible membrane layer located on the base substrate.

3. The stretchable display substrate according to claim 2, wherein: The display unit includes an encapsulation layer, the encapsulation layer includes an organic encapsulation layer, and the first flexible film layer and the organic encapsulation layer are formed from the same layer and the same material.

4. The stretchable display substrate according to claim 3, wherein: The materials of the first flexible film layer and the organic encapsulation layer include optical adhesive materials.

5. The stretchable display substrate according to claim 3, wherein: The encapsulation layer also includes a first inorganic encapsulation layer and a second inorganic encapsulation layer located on opposite surfaces of the organic encapsulation layer. The flexible barrier structure also includes a first inorganic layer and a second inorganic layer located on opposite surfaces of the first flexible film layer. The first inorganic layer and the first inorganic encapsulation layer are of the same layer and material, and the second inorganic layer and the second inorganic encapsulation layer are of the same layer and material.

6. The stretchable display substrate according to claim 3, wherein: The flexible barrier structure includes a second flexible membrane layer located between the first flexible membrane layer and the base substrate.

7. The stretchable display substrate according to claim 6, wherein: The display unit includes a driving circuit layer, a light-emitting layer, and a spacer layer sequentially arranged between the base substrate and the encapsulation layer. The driving circuit layer and the light-emitting layer both include organic layers. The second flexible film layer is formed from the same layer and material as the organic layer of the driving circuit layer, the organic layer in the light-emitting layer, and at least one layer of the spacer layer.

8. The stretchable display substrate according to claim 7, wherein: The organic layer of the driving circuit layer includes a first planarization layer and a second planarization layer, the light-emitting layer includes a pixel defining layer, and the second flexible membrane layer is made of the same layer and material as at least one of the first planarization layer, the second planarization layer, the pixel defining layer, and the spacer layer.

9. The stretchable display substrate according to claim 1, wherein: The flexible blocking structure has a blocking sidewall on a side close to the opening pattern, the opening pattern has an opening sidewall, and the blocking sidewall is flush with the opening sidewall.

10. The stretchable display substrate according to claim 1, wherein: The flexible blocking structure has a blocking sidewall on a side close to the opening pattern, and the opening pattern has an opening sidewall. The blocking sidewall is retracted toward a side away from the opening pattern to form a notch portion located at the edge of the opening pattern.

11. The stretchable display substrate according to claim 10, wherein: The inward shrinkage size of the notch is 2 μm-10 μm.

12. A display device, characterized in that: Comprising the stretchable display substrate as described in any one of claims 1 to 11.

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