Display panel and display device

Abstract

To enhance encapsulation reliability of an encapsulating layer, thereby increasing the service life of a stretchable display panel.SOLUTION: A stretchable display panel includes a substrate and a plurality of pixel islands spaced on the substrate. The pixel island has a light-emitting area and a non-light-emitting area adjacent to the light-emitting area. The pixel island includes: a driving layer group disposed on the substrate; a pixel-defining structure disposed on the driving layer group, and defining a pixel opening located in the light-emitting area, where at least one groove located in the non-light-emitting area is further provided at a side of the pixel-defining structure away from the driving layer group, and the groove extends through the pixel-defining structure and a part of the driving layer group along a thickness direction of the substrate; a light-emitting unit disposed in the pixel opening; and an encapsulating layer that covers a side of the light-emitting unit away from the substrate and a wall of the groove.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] This application relates to the field of display technology, and in particular to stretchable display panels and display devices. [Background technology]

[0002] This application claims priority to a Chinese patent application bearing application number 202311199578X and entitled "Stretchable display panel and display device," filed with the State Intellectual Property Office of the People's Republic of China on September 15, 2023, the entire disclosure of which is incorporated herein by reference.

[0003] Stretchable organic light emitting diode (OLED) display panels have been attracting attention in the display industry in recent years due to their unique display format, and their development is progressing. Currently, stretchable OLED display panels can initially achieve a stretch rate of 10%. However, conventional stretchable OLED display panels have a problem of low sealing reliability. Summary of the Invention [Problem to be solved by the invention]

[0004] Based on this, there is a need to provide a stretchable display panel and a display device that can improve sealing reliability. [Means for solving the problem]

[0005] In a first aspect, the present embodiment comprises: A substrate; a plurality of pixel islands provided on the substrate at intervals, the pixel islands having light-emitting regions and non-light-emitting regions adjacent to the light-emitting regions, the pixel islands comprising: a driving layer group provided on the substrate; a pixel definition structure provided in the driving layer group and defining a pixel opening located in the light-emitting region, wherein at least one groove located in the non-light-emitting region is further provided on a side of the pixel definition structure away from the driving layer group, the groove penetrating the pixel definition structure and a portion of the driving layer group along a thickness direction of the substrate; a light-emitting unit disposed within the pixel aperture; a sealing layer covering the side of the light-emitting unit away from the substrate and the groove wall of the groove.

[0006] In the stretchable display panel, the pixel defining structure has a groove located in the non-light emitting region, the groove penetrates the pixel defining structure and some of the driving layers, and the sealing layer extends to cover the groove wall of the groove. Therefore, the groove can reduce the tendency of cracks to extend towards the light emitting region, while increasing the contact area of ​​the sealing layer, thereby improving the overall sealing reliability of the sealing layer and further increasing the service life of the stretchable display panel.

[0007] In a second aspect, the present embodiment comprises: A substrate; a plurality of pixel islands provided on the substrate at intervals, the pixel islands having a light-emitting region and a non-light-emitting region adjacent to the light-emitting region, the pixel islands comprising: a driving layer group provided on the substrate; a light-emitting unit provided in the driving layer group and positioned in the light-emitting region; an encapsulation auxiliary structure provided in the driving layer group and located in the non-light-emitting region, the encapsulation auxiliary structure having at least one trench on a side away from the driving layer group, the encapsulation auxiliary structure including an inorganic material; a sealing layer covering the sides of the light-emitting units facing away from the substrate and the groove walls of the trenches.

[0008] In the stretchable display panel, the driving layers are provided with a sealing support structure, and the sealing support structure is provided with a trench, and the sealing layer extends to cover the groove wall of the trench, so that the trench can reduce the tendency of cracks to extend toward the light-emitting region, while increasing the contact area of ​​the sealing layer and improving the sealing performance of the sealing layer. In addition, the sealing layer can directly contact the inorganic trench, improving the film layer adhesion of the sealing layer, thereby improving the sealing performance of the sealing layer, further improving the overall sealing reliability of the sealing layer and improving the service life of the stretchable display panel.

[0009] In a third aspect, the present embodiment further comprises: A substrate; a plurality of pixel islands spaced apart on the substrate; The pixel island comprises: a driving layer group provided on the substrate and including a main body portion and an edge portion connected to the main body portion; a light-emitting unit provided in the main body; a protective structure provided on the edge portion and having at least one recess; a sealing layer covering the side of the light-emitting unit away from the substrate and the wall surface of the recess.

[0010] In the above stretchable display panel, a protective structure is provided at the edge portion, and a recess is provided in the protective structure, and the sealing layer extends to cover the wall surface of the recess. This recess can reduce the tendency of cracks to propagate toward the main body portion, while increasing the contact area of ​​the sealing layer, thereby improving the overall sealing reliability of the sealing layer and further improving the service life of the stretchable display panel.

[0011] In a fourth aspect, an embodiment of the present application provides a display device including a stretchable display panel according to any of the embodiments of the first, second or third aspect. [Effects of the Invention]

[0012] The display device can reduce the tendency of cracks to extend toward the light-emitting units while increasing the contact area of ​​the sealing layer, thereby improving the overall sealing reliability and further increasing the service life of the display device. [Brief explanation of the drawings]

[0013] In order to more clearly describe the technical means in the embodiments or exemplary embodiments of the present application, the following will briefly describe the drawings that need to be used to describe the embodiments or exemplary embodiments. It is obvious that the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0014] [Figure 1] FIG. 2 is a partial top view of a display panel according to an embodiment of the present application. [Figure 2] FIG. 2 is a cross-sectional view of the display panel shown in FIG. [Figure 3] 2 is a diagram showing an arrangement of recessed grooves in the display panel shown in FIG. 1. FIG. [Figure 4] 1. FIG. 4 is a diagram showing another arrangement of recessed grooves in the display panel shown in FIG. [Figure 5] 1. FIG. 4 is a diagram showing yet another arrangement of recessed grooves in the display panel shown in FIG. [Figure 6] 1. FIG. 4 is a diagram showing yet another arrangement of recessed grooves in the display panel shown in FIG. [Figure 7] 2 is a diagram showing an arrangement of a protection structure for the display panel shown in FIG. 1. FIG. [Figure 8] 1. FIG. 4 is a diagram showing another arrangement of the protection structure for the display panel shown in FIG. [Figure 9] 2 is a cross-sectional view of a protective structure and an edge portion of the display panel shown in FIG. [Figure 10] 1. FIG. 4 is another cross-sectional view of the protection structure and edge portion of the display panel shown in FIG. [Figure 11]1. FIG. 4 is yet another cross-sectional view of the protection structure and edge portion of the display panel shown in FIG. [Figure 12] 2 is another cross-sectional view of the display panel shown in FIG. 1. [Figure 13] FIG. 13 is a partial cross-sectional view of the display panel shown in FIG. [Figure 14] 1. FIG. 4 is yet another cross-sectional view of the display panel shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] To facilitate an understanding of the present application, the present application will now be described more fully hereinafter with reference to the associated drawings, in which preferred embodiments of the present application are shown. However, the present application may be embodied in many different forms and is not limited to the embodiments set forth herein. Rather, the purpose of providing these embodiments is to provide a more complete and thorough understanding of the present disclosure.

[0016] Currently, flexible display panels have made great progress, and display panels that are curved, foldable, stretchable, etc. have great prospects for development in fields such as smart wearables and automotive applications. In conventional stretchable display technologies, the adhesion strength between the encapsulation layer and the pixel-defining layer or array layers is low, resulting in weak contact, and cracks are likely to occur in the encapsulation layer during etching processes, peeling processes, and tensile tests, which can cause pixel island failures.

[0017] In view of the above problems, the embodiments of the present application provide a stretchable display panel and a display device that can improve sealing reliability.

[0018] The stretchable display panel may be a stretchable organic light emitting diode (OLED) display panel, a stretchable quantum dot light emitting diode (QLED) display panel, or the like.

[0019] 1 and 2, an embodiment of the present application provides a stretchable display panel 100 including a substrate 1 and a plurality of pixel islands 2. The plurality of pixel islands 2 are spaced apart on the substrate 1. Each pixel island 2 has a light-emitting region 2a and a non-light-emitting region 2b adjacent to the light-emitting region 2a. Illustratively, the substrate 1 is a flexible substrate having tensile properties.

[0020] Specifically, the pixel island 2 includes a driving layer group 21, a pixel defining structure 22, a light-emitting unit 23, and an encapsulation layer 24. The driving layer group 21 is disposed on the substrate 1. The pixel defining structure 22 is disposed on the driving layer group 21. The pixel defining structure 22 defines a pixel opening located in the light-emitting region 2a. The pixel defining structure 22 further includes at least one groove 25 located in the non-light-emitting region 2b on a side thereof away from the driving layer group 21, the groove 25 penetrating through the pixel defining structure 22 and a portion of the driving layer group 21 along the thickness direction of the substrate 1. The light-emitting unit 23 is disposed within the pixel opening. The encapsulation layer 24 covers the side of the light-emitting unit 23 away from the substrate 1 and the groove wall of the groove 25.

[0021] In the present embodiment, the encapsulating layer 24 is an inorganic encapsulating layer film layer. The encapsulating layer 24 extends from the surface of the light-emitting unit 23 toward the non-light-emitting region 2b, and covers the exposed surface of the pixel-defining structure 22 and the groove wall of the groove 25. Note that, when A covers one side of B or when A covers the surface (or wall) of B, it means that A and B are in direct contact with each other.

[0022] The groove 25 penetrates the pixel defining structure 22 and part of the driving layer group 21 along the thickness direction of the substrate 1, i.e., part of the sidewall of the groove 25 is located in the pixel defining structure 22, and the bottom wall and other part of the sidewall of the groove 25 are located in the driving layer group 21. By penetrating part of the driving layer group 21, the depth of the groove 25 can be increased, thereby increasing the surface area of ​​the groove wall of the groove 25. Furthermore, since the sealing layer 24 covers the groove wall of the groove 25, the coverage area of ​​the sealing layer 24 can be increased.

[0023] In the present embodiment, the non-light-emitting region 2b includes a transition region 2b1 and a sealing region 2b2, and the transition region 2b1 is located between the sealing region 2b2 and the light-emitting region 2a. For example, the groove 25 may be provided in the sealing region 2b2. Furthermore, the non-light-emitting region 2b surrounds the outer periphery of the light-emitting region 2a.

[0024] In addition, the pixel-defining structure 22 in the embodiment of the present application may be a pixel-defining layer or other structure that defines the position of the light-emitting unit. The embodiment of the present application does not limit the specific configuration of the pixel-defining structure 22.

[0025] In the stretchable display panel 100 according to the embodiment of the present application, the pixel defining structure 22 is provided with a groove 25 located in the non-light-emitting region 2b, the groove 25 penetrates the pixel defining structure 22 and part of the driving layer group 21, and the encapsulating layer 24 extends to cover the groove wall of the groove 25. Therefore, when a crack occurs, the groove 25 can inhibit the crack from progressing to a certain extent and reduce the tendency of the crack to extend toward the light-emitting region 2a. Meanwhile, the groove 25 can increase the contact area of ​​the encapsulating layer 24, thereby improving the overall sealing reliability of the encapsulating layer 24 and further improving the service life of the stretchable display panel 100.

[0026] In one example, the driving layer group 21 includes a base 211 and is provided on the substrate 1 via the base 211. In another example, the driving layer group 21 does not have the base 211, that is, the driving layer group 21 is provided directly on the substrate 1. At this time, a stretching region and a pixel region may be provided on the substrate 1, and the driving layer group 21 is provided in the pixel region, and when stretched, the stretching region is stretched and the pixel region is not stretched.

[0027] The light-emitting unit 23 includes a first electrode 231, a light-emitting functional section 232, and a second electrode 233, which are stacked in a direction away from the substrate 1. The light-emitting functional section 232 includes at least an emission layer (EML), and may also include one or more of a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), an electron transport layer (ETL), a hole block layer (HBL), and an electron block layer (EBL). Alternatively, the light-emitting functional section 232 may be a stacked light-emitting layer including at least two light-emitting layers and a charge generation layer (CGL) located between adjacent light-emitting layers.

[0028] In one embodiment, the driving layer group 21 includes an inorganic film layer and an organic film layer, and the inorganic film layer is disposed between the substrate 1 and the organic film layer. The groove 25 penetrates at least the organic film layer to expose a portion of the inorganic film layer. The sealing layer 24 covers the exposed surface of the inorganic film layer.

[0029] By exposing a portion of the inorganic film layer, the exposed surface of the inorganic film layer can be used as the groove wall of the groove 25, i.e., a portion of the groove wall of the groove 25 is used as the inorganic groove wall. In this way, the sealing layer 24 is in direct contact with the inorganic groove wall, which improves the adhesion of the sealing layer 24 to the film layer, further improving the sealing performance of the sealing layer 24, and further improving the overall sealing reliability of the sealing layer 24, thereby improving the service life of the stretchable display panel 100.

[0030] In one example, the groove 25 penetrates only the organic film layer, and the groove bottom of the groove 25 extends to the top surface of the inorganic film layer.

[0031] In one embodiment, the groove 25 penetrates through the organic film layer and a portion of the inorganic film layer. In this way, the depth of the groove 25 can be increased to increase the surface area of ​​the groove wall of the groove 25, while a portion of the groove wall and the bottom wall of the groove 25 are located in the inorganic film layer, which increases the contact area between the encapsulating layer 24 and the inorganic groove wall, further improving the adhesion of the encapsulating layer 24 to the film layers and further improving the overall sealing reliability of the encapsulating layer 24 and the service life of the stretchable display panel 100.

[0032] In one embodiment, the driving layer group 21 includes an interlayer insulating layer 212 and a planarization layer 213, and the interlayer insulating layer 212 is located between the substrate 1 and the planarization layer 213. The material of the interlayer insulating layer 212 includes an inorganic material, and the material of the planarization layer 213 includes an organic material, i.e., the interlayer insulating layer 212 is an inorganic film layer, and the planarization layer 213 is an organic film layer. The groove 25 penetrates the planarization layer 213 and a portion of the interlayer insulating layer 212.

[0033] In this way, the depth of the groove 25 is increased, thereby increasing the surface area of ​​the groove wall of the groove 25, and part of the groove wall and the bottom wall of the groove 25 are located on the interlayer insulating layer 212, thereby increasing the contact area between the encapsulating layer 24 and the inorganic groove wall, further improving the film layer adhesion of the encapsulating layer 24, further improving the overall sealing reliability of the encapsulating layer 24, and increasing the service life of the stretchable display panel 100. Furthermore, as shown in FIG. 2 , after the encapsulating layer 24 and the interlayer insulating layer 212 come into contact with each other, the light-emitting units 23 and the planarizing layer 213 (organic film layer) in the light-emitting region 2a are completely covered. The interlayer insulating layer 212 can prevent water and oxygen from penetrating the side of the interlayer insulating layer 212 closest to the substrate 1 toward the light-emitting units 23, and the encapsulating layer 24 can prevent water and oxygen from penetrating the side of the encapsulating layer 24 away from the substrate 1 toward the light-emitting units 23. That is, a double-sided blocking structure is formed, which further improves sealing reliability and ensures sealing stability between the upper and lower film layers.

[0034] In one embodiment, the stretchable display panel 100 further includes connecting lines 3 connecting adjacent pixel islands 2. The driving layer group 21 includes wiring 214 electrically connected to the connecting lines 3. Illustratively, a pixel driving circuit is provided in the driving layer group 21, and one end of the wiring 214 is connected to the pixel driving circuit and the other end is connected to the connecting lines 3, i.e., the connecting lines 3 and the wiring 214 electrically connect the pixel driving circuits of adjacent pixel islands 2.

[0035] 2 , the wiring 214 includes a first wiring portion 2141 and a second wiring portion 2142, and one end of the second wiring portion 2142 is electrically connected to the first wiring portion 2141 and the other end is electrically connected to the connecting line 3. The first wiring portion 2141 is provided in a different layer from the second wiring portion 2142. In one example, the end of the first wiring portion 2141 remote from the second wiring portion 2142 is connected to the pixel driving circuit.

[0036] In particular, in the examples of the present application, "provided in the same layer" means that the two structures are manufactured using the same material in the same process. "provided in different layers" means that the two structures are manufactured in different processes. Furthermore, one end of the second wiring portion 2142 is electrically connected to the first wiring portion 2141, and "electrically connected" here means that the two are directly or indirectly electrically connected. Similarly, the other end of the second wiring portion 2142 is electrically connected to the connection line 3, and the two may be directly or indirectly electrically connected.

[0037] Furthermore, since the bottom of the groove 25 extends into the drive layer group 21, it is likely to affect the arrangement of the wiring within the drive layer group 21. The embodiment of the present application is advantageous in optimizing the arrangement of the wiring 214, that is, by providing the first wiring portion 2141 and the second wiring portion 2142 on different layers, the wiring 214 is retracted from the groove 25 and the effect of the groove 25 on the wiring 214 is reduced.

[0038] In one embodiment, the driving layer group 21 further includes a gate insulating layer 215 and a capacitor insulating layer 216, where the gate insulating layer 215 and the capacitor insulating layer 216 are located between the substrate 1 and the interlayer insulating layer 212, and the gate insulating layer 215 is located between the substrate 1 and the capacitor insulating layer 216. The second wiring portion 2142 is located between the gate insulating layer 215 and the capacitor insulating layer 216.

[0039] In this way, by providing the second wiring portion 2142 between the gate insulating layer 215 and the capacitance insulating layer 216, it is advantageous in that it is retracted from the groove 25 and the influence of the groove 25 on the wiring 214 is reduced.

[0040] In one embodiment, the driving layer group 21 further includes a gate electrode 219, which is located between the gate insulating layer 215 and the capacitance insulating layer 216, and the second wiring portion 2142 is provided in the same layer as the gate electrode 219. In this way, the second wiring portion 2142 can be manufactured simultaneously when manufacturing the gate electrode 219, thereby reducing the number of manufacturing steps for the stretchable display panel 100 and lowering manufacturing costs.

[0041] In one embodiment, the first wiring portion 2141 is located between the interlayer insulating layer 212 and the planarizing layer 213 .

[0042] In addition, a first metal layer (M1) is provided between the gate insulating layer 215 and the capacitor insulating layer 216, and the gate electrode 219 and the capacitor lower electrode (not shown) are usually located on the first metal layer. In this embodiment, the second wiring portion 2142 is also located on the first metal layer. A third metal layer (M3) is provided between the interlayer insulating layer 212 and the planarizing layer 213, and some lead wires of the pixel driving circuit are usually located on the third metal layer. In this embodiment, the first wiring portion 2141 is also located on the third metal layer. This reduces the number of manufacturing steps for the stretchable display panel 100 and reduces manufacturing costs.

[0043] In one embodiment, a portion of the orthogonal projection of the second wiring portion 2142 onto the substrate 1 overlaps with the orthogonal projection of the groove 25 onto the substrate 1. As shown in Fig. 2, the groove 25 and the second wiring portion 2142 overlap in the vertical direction. As can be seen from Fig. 2, when the second wiring portion 2142 is located between the interlayer insulating layer 212 and the planarizing layer 213, the groove 25 and the second wiring portion 2142 interfere with each other, which not only affects the arrangement of the wiring 214 but also affects the placement of the groove 25.

[0044] In one embodiment, the first wiring portion 2141 and the second wiring portion 2142 are electrically connected via the first via hole structure 2144. This simplifies the electrical connection between the first wiring portion 2141 and the second wiring portion 2142, making it easier to manufacture.

[0045] In one embodiment, a part of the orthogonal projection of the first wiring portion 2141 onto the substrate 1 overlaps with the orthogonal projection of the second wiring portion 2142 onto the substrate 1.

[0046] In this way, when manufacturing the first wiring portion 2141, it is possible to reduce the difficulty of electrically connecting the first wiring portion 2141 and the second wiring portion 2142, and improve the reliability of the electrical connection between them.

[0047] In one embodiment, the wiring 214 further includes a third wiring portion 2143 that electrically connects the second wiring portion 2142 and the connection line 3. The third wiring portion 2143 is provided in a different layer from the second wiring portion 2142.

[0048] In this way, the second wiring portion 2142 is electrically connected to the connecting line 3 via the third wiring portion 2143, which reduces the difficulty of electrically connecting the wiring 214 to the connecting line 3, while also optimizing the arrangement of the wiring 214 and advantageously reducing the effect of the groove 25 on the wiring 214.

[0049] In one embodiment, the third wiring portion 2143 is provided in the same layer as the first wiring portion 2141. In this way, the first wiring portion 2141 and the third wiring portion 2143 can be manufactured simultaneously, thereby reducing the manufacturing process and manufacturing difficulty of the wiring 214.

[0050] In one embodiment, the third wiring portion 2143 and the second wiring portion 2142 are electrically connected through a second via hole structure 2145 .

[0051] This simplifies the electrical connection between the third wiring portion 2143 and the second wiring portion 2142, making manufacturing easier.

[0052] In one embodiment, a part of the orthogonal projection of the third wiring portion 2143 onto the substrate 1 overlaps with the orthogonal projection of the second wiring portion 2142 onto the substrate 1.

[0053] In this way, when manufacturing the third wiring portion 2143, it is possible to reduce the difficulty of electrically connecting the third wiring portion 2143 and the second wiring portion 2142, and improve the reliability of the electrical connection between them.

[0054] In one embodiment, the orthogonal projection of the encapsulation layer 24 onto the pixel-defining structure 22 covers the grooves 25, i.e., the encapsulation layer 24 covers all the groove walls of the grooves 25. In this way, the contact area of ​​the encapsulation layer 24 can be increased, and the sealing reliability of the encapsulation layer 24 is improved.

[0055] In one embodiment, the pixel-defining structure 22 has a plurality of grooves 25 arranged at intervals in the non-light-emitting region 2b, and the sealing layer 24 covers the groove walls of the plurality of grooves 25.

[0056] In this way, the grooves 25 have a stronger ability to suppress crack propagation and further reduce the tendency of cracks to extend toward the light-emitting region 2a, while the contact area of ​​the encapsulating layer 24 is further increased, which is advantageous to improving the sealing reliability of the encapsulating layer 24. In addition, the contact area between the encapsulating layer 24 and the inorganic groove wall is further increased, which further improves the film layer adhesion of the encapsulating layer 24, further improving the overall sealing reliability of the encapsulating layer 24 and advantageous to improving the service life of the stretchable display panel 100.

[0057] In a preferred embodiment, the number of grooves 25 is five or more, which can improve the sealing reliability of the sealing layer 24.

[0058] Furthermore, the inventors have found through research that by using the groove 25 arrangement method of the embodiment of the present application to provide five sets of grooves 25, compared to the structure of the related art in which grooves 25 are not provided, while achieving the same sealing effect, the embodiment of the present application can make the width of the sealing region 2b2 20 μm to 30 μm, saving approximately 4 μm to 24 μm of width space in the non-light-emitting region 2b1, which is advantageous for reducing the width of the sealing frame of the pixel island 2.

[0059] In one embodiment, as shown in FIG. 3 , the non-emissive region 2b surrounds the periphery of the emissive region 2a, and the groove 25 surrounds the periphery of the emissive region 2a. That is, the groove 25 is provided around the periphery of the emissive region 2a. This improves the sealing reliability around the emissive region 2a, which is beneficial to extending the service life of the stretchable display panel 100 and improving the space utilization rate of the pixel island 2. For example, an optimized space can be allocated to the emissive region 2a or the connecting lines 3, which is beneficial to extending the service life and elongation rate of the stretchable display panel 100.

[0060] In one embodiment, the orthogonal projection of the groove 25 onto the substrate 1 is a closed annular pattern, which can uniformly improve the sealing reliability around the periphery of the light-emitting region 2a and ensure high sealing reliability of the sealing layer 24.

[0061] For example, the shape of the groove 25 when orthogonally projected onto the substrate 1 may be a rectangular ring, a circular ring, a triangular ring, or the like.

[0062] In one embodiment, as shown in FIG. 4, the recessed groove 25 includes a plurality of first groove segments 251, which are spaced apart from one another and surround the outer periphery of the light-emitting region 2a.

[0063] In this way, the sealing reliability of the periphery of the light emitting region 2a can be improved, the area occupied by the grooves 25 can be reduced, and the etching cost of the grooves 25 can be reduced.

[0064] In a preferred embodiment, the plurality of first groove segments 251 are uniformly arranged around the periphery of the light emitting region 2a, thereby uniformly improving the sealing reliability of the periphery of the light emitting region 2a.

[0065] 5, in two adjacent grooves 25, each groove 25 includes a plurality of first groove segments 251. There is a gap between the two adjacent first groove segments 251 in the same groove 25. Of the two adjacent grooves 25, the gap in one groove 25 and the first groove segment 251 in the other groove 25 face each other.

[0066] As a result, the first groove segments 251 of two adjacent grooves 25 are arranged to be offset from each other. In this way, the area occupied by the grooves 25 can be reduced, and the sealing reliability of the sealing layer 24 can be further improved.

[0067] 6 , the recessed groove 25 includes one first main groove 252 and multiple first sub-grooves 253. The orthogonal projection of the first main groove 252 onto the substrate 1 forms a closed annular pattern, and the first main groove 252 is provided to surround the outer periphery of the light-emitting region 2a. The multiple first sub-grooves 253 are provided at intervals around the outer periphery of the light-emitting region 2a, and a portion of the orthogonal projection of the first sub-groove 253 onto the substrate 1 overlaps with the orthogonal projection of the first main groove 252 onto the driving layer group 21.

[0068] In this way, the contact area between the sealing layer 24 and the recessed groove 25 can be increased, and the sealing reliability of the sealing layer 24 can be improved.

[0069] In one embodiment, the first sub-groove 253 has a first end 253a and a second end 253b that are opposite to each other, and the first end 253a is located on a side of the first main groove 252 that is closer to the light-emitting region 2a, and the second end 253b is located on a side of the first main groove 252 that is farther from the non-light-emitting region 2b. That is, the first sub-groove 253 intersects with the first main groove 252.

[0070] In this way, the contact area between the sealing layer 24 and the groove 25 can be further increased, thereby improving the sealing reliability of the sealing layer 24. Meanwhile, after the sealing layer 24 covers the first sub-groove 253 and the first main groove 252, the first main groove 252 and the first sub-groove 253 correspond to a "latch structure", and if peeling occurs in the sealing layer 24, the latch structure can suppress the expansion of the peeling, or if crack propagation occurs in the sealing layer 24, the latch structure can suppress the crack propagation, thereby improving the overall sealing reliability of the sealing layer 24 and further improving the service life of the stretchable display panel 100.

[0071] In one embodiment, the dimension of the groove 25 along the first direction X when projected onto the substrate 1 is a first width W1, the distance between two adjacent grooves 25 is a first spacing L1, and the first width W1 is greater than or equal to the first spacing L1.

[0072] The first direction X is perpendicular to the thickness direction of the substrate 1 and perpendicular to the length direction of the orthogonal projection of the groove 25 onto the substrate 1.

[0073] In this way, it is advantageous to reduce the difficulty of etching the grooves 25, and to improve the adhesion stability between the sealing layer 24 and the grooves 25, while also being advantageous to increase the number of grooves 25 within a limited space.

[0074] 2, the driving layer group 21 includes a main body portion 2111 and an edge portion 2112 connected to the main body portion 2111. The pixel-defining structures 22 and the light-emitting units 23 are both provided in the main body portion 2111. At least one protective structure 26 is provided on the edge portion 2112, and the protective structure 26 has at least one recess 26a, and the sealing layer 24 further covers the wall surface of the recess 26a.

[0075] Here, the protective structure 26 is a structure that suppresses the progression of cracks to the main body portion 2111, and specifically, the protective structure 26 suppresses the progression of cracks via the recessed portion 26a.

[0076] In the present embodiment, the recesses 26a can reduce the tendency of cracks to propagate toward the main body portion 2111 while increasing the contact area of ​​the sealing layer 24, thereby improving the overall sealing reliability of the sealing layer 24 and further improving the service life of the stretchable display panel 100.

[0077] In one embodiment, the dimensions of the main body portion 2111 are greater than the dimensions of the edge portion 2112 along the thickness direction of the substrate 1 , ie the thickness of the main body portion 2111 is greater than the thickness of the edge portion 2112 .

[0078] In one example, the driving layer group 21 includes a base 211, which is provided on a substrate 1, and other film layers of the driving layer group 21, such as a barrier layer 217, a buffer layer 218, a gate insulating layer 215, a capacitance insulating layer 216, an interlayer insulating layer 212, and a planarization layer 213, are stacked on the base 211.

[0079] Specifically, the main body portion 2111 and the edge portion 2112 are provided on the base 211. As a result, after the base 211 is manufactured, the edge portion 2112 can be formed by thinning the edge of the base 211, and the area that is not thinned is the main body portion 2111.

[0080] Furthermore, when peeling the pixel island 2 from the glass substrate, cracks are likely to occur in the sealing layer 24 at the edge portion 2112 of the pixel island 2. The protective structure 26 can prevent cracks in the sealing layer 24 at the edge portion 2112 of the pixel island 2 from extending to the side walls of the main body portion 2111 and the light-emitting region 2a. The protective structure 26 has the effect of preventing and suppressing the extension of cracks, and can effectively protect the sealing layer 24 on the side walls and top surface of the pixel island 2, thereby improving sealing reliability.

[0081] In one embodiment, the encapsulation layer 24 further covers the side surfaces of the pixel defining structures 22 and the main body portion 2111. Specifically, the encapsulation layer 24 extends along the top surfaces of the pixel defining structures 22 toward the edge portions 2112, covering the side surfaces of the pixel defining structures 22 and the main body portion 2111 along the extending path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, and the sealing reliability of the encapsulation layer 24 can be improved.

[0082] In one embodiment, the edge portion 2112 is provided around the outer periphery of the main body portion 2111 , and the protective structure 26 is provided around the outer periphery of the main body portion 2111 .

[0083] This is advantageous in improving the sealing reliability around the light emitting region 2a and further improving the protection performance of the protective structure .

[0084] In one embodiment, as shown in FIG. 2, the edge portion 2112 is provided with a plurality of protective structures 26 spaced apart, and the encapsulating layer 24 covers the recesses 26a of each protective structure 26.

[0085] In this way, increasing the number of protective structures 26 is equivalent to providing multiple layers of protection, and it is possible to further improve the sealing reliability and protective performance.

[0086] In one embodiment, of two adjacent protective structures 26, one protective structure 26 is provided to surround the outer periphery of the main body portion 2111, and the other protective structure 26 is provided to surround the outer periphery of the one protective structure 26.

[0087] This is equivalent to two protective structures 26 being nested one inside the other and surrounding the outer periphery of the light-emitting region 2a, which is advantageous in forming a ring-shaped multi-layer protective structure 26 that is connected to each other around the outer periphery of the light-emitting region 2a, further improving sealing reliability and protective performance.

[0088] In one embodiment, as shown in FIG. 8, the protective structure 26 includes a plurality of substructures 26b, which are spaced apart and arranged around the outer periphery of the main body portion 2111.

[0089] In this way, the sealing reliability of the periphery of the light emitting region 2a can be improved, and the area occupied by the protective structure 26 can be reduced.

[0090] In a preferred embodiment, the plurality of sub-structures 26b are uniformly arranged around the periphery of the light emitting region 2a, thereby uniformly improving the sealing reliability of the periphery of the light emitting region 2a.

[0091] 8 , in two adjacent protective structures 26, each protective structure 26 includes multiple substructures 26b, and there is a gap between two adjacent substructures 26b in the same protective structure 26. Of the two adjacent protective structures 26, the gap in one protective structure 26 faces the substructure 26b in the other protective structure 26.

[0092] As a result, the substructures 26b of two adjacent protective structures 26 are arranged to be offset from each other. In this manner, the area occupied by the protective structures 26 can be reduced, and the sealing reliability of the sealing layer 24 can be further improved.

[0093] In one embodiment, as shown in FIG. 2, the dimension of the protection structure 26 along the first direction X when projected onto the substrate 1 is a second width W2, the distance between two adjacent protection structures 26 is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2.

[0094] The first direction X is perpendicular to the thickness direction of the substrate 1 and perpendicular to the length direction of the protection structure 26 .

[0095] In this way, it is advantageous to improve the adhesion stability between the sealing layer 24 and the protective structure 26 and reduce the space occupied by the protective structure 26, while also advantageous to deposit the sealing layer 24 between two adjacent protective structures 26, thereby ensuring good contact between the structures between the sealing layer 24 and the two protective structures 26 and improving the sealing reliability of the sealing layer 24.

[0096] In the embodiment of the present application, the recess 26a is located on at least one side of the protective structure 26 in the first direction X. In one example, as shown in Fig. 9, the protective structure 26 has one recess 26a along one side in the first direction X. Specifically, the protective structure 26 has a C-shaped cross section along a direction perpendicular to the paper surface.

[0097] In one embodiment, the protective structure 26 has a plurality of recesses 26a, and the encapsulating layer 24 covers the wall surfaces of the recesses 26a. In this way, the crack propagation suppression ability of the protective structure 26 can be further improved, and the contact area between the encapsulating layer 24 and the protective structure 26 can be increased, thereby improving the overall sealing reliability of the encapsulating layer 24 and further improving the service life of the stretchable display panel 100.

[0098] In one embodiment, as shown in FIGS. 10 and 11, the protective structure 26 has two recesses 26a, and the openings of the two recesses 26a are back-to-back with each other.

[0099] In this way, after the sealing layer 24 completely covers the two recesses 26a of the protective structure 26, on the one hand, when a crack propagates along the sealing layer 24, the crack propagation path is bent, increasing the difficulty of crack propagation and suppressing the crack propagation; on the other hand, when peeling occurs in the sealing layer 24, the two recesses 26a of the protective structure 26 form a "latch structure" that locks the sealing layer 24 and reduces the tendency of the sealing layer 24 to peel off.

[0100] 10 , the protective structure 26 includes a first portion 261 and a second portion 262 sequentially stacked on an edge portion 2112, and both opposing ends of the second portion 262 along a first direction X protrude from the sidewall of the first portion 261. The first direction X is perpendicular to the thickness direction of the substrate 1. The protruding portions of the first portion 261 and the second portion 262 and the edge portion 2112 define a recess 26a. This allows the structure of the protective structure 26 to be simplified.

[0101] Specifically, as shown in FIG. 10, the protective structure 26 has a "T" shaped cross section taken along a direction perpendicular to the paper surface.

[0102] 11 , the protective structure 26 includes a third portion 263, a first portion 261, and a second portion 262 sequentially stacked on the edge portion 2112. Opposite ends of the third portion 263 along the first direction X protrude from the sidewalls of the first portion 261. Opposite ends of the second portion 262 along the first direction X protrude from the sidewalls of the first portion 261. The first direction X is perpendicular to the thickness direction of the substrate 1. The protruding portion of the third portion 263 and the protruding portions of the first portion 261 and the second portion 262 define a recess 26a. This increases the contact area between the protective structure 26 and the sealing layer 24, which is advantageous for improving the adhesion stability between the protective structure 26 and the sealing layer 24.

[0103] Specifically, as shown in FIG. 11, the protective structure 26 has an "H"-shaped cross section taken along a direction perpendicular to the paper surface.

[0104] In one embodiment, the material of the third portion 263 is the same as the material of the second portion 262 .

[0105] In one embodiment, the material of the third portion 263 is different from the material of the first portion 261 .

[0106] In one embodiment, the material of the third portion 263 includes titanium, and the material of the first portion 261 includes aluminum. That is, the protective structure 26 is a structure made of three metal layers of titanium aluminum titanium. This allows the protective structure 26 to be formed by side etching the layered metals. Note that the protective structure 26 may also be made of layered metals made of other materials.

[0107] In a second aspect, as shown in Figures 1, 12, 13 and 14, an embodiment of the present application provides another stretchable display panel 100 including a substrate 1 and a plurality of pixel islands 2. The plurality of pixel islands 2 are spaced apart on the substrate 1. Each pixel island 2 has a light-emitting region 2a and a non-light-emitting region 2b adjacent to the light-emitting region 2a. Illustratively, the substrate 1 is a flexible substrate 1 having tensile properties.

[0108] Specifically, the pixel island 2 includes a driving layer group 21, a light-emitting unit 23, an encapsulating support structure 27, and an encapsulating layer 24. The driving layer group 21 is disposed on the substrate 1. The light-emitting unit 23 is disposed on the driving layer group 21 and is located in the light-emitting region 2a. The encapsulating support structure 27 is disposed on the driving layer group 21 and is located in the non-light-emitting region 2b. At least one trench 271 is provided on the side of the encapsulating support structure 27 away from the driving layer group 21. The encapsulating support structure 27 includes an inorganic material. The encapsulating layer 24 covers the side of the light-emitting unit 23 away from the substrate 1 and the groove wall of the trench 271.

[0109] In the present embodiment, the encapsulation layer 24 is an inorganic encapsulation film layer. The encapsulation layer 24 extends from the surface of the light-emitting unit 23 toward the non-light-emitting region 2b, and covers the surface of the encapsulation support structure 27 and the groove wall of the trench 271.

[0110] The trench 271 is an inorganic trench, i.e., the trench 271 has a groove structure with groove walls made of an inorganic material. In this embodiment, the non-light-emitting region 2b includes a transition region 2b1 and a sealing region 2b2, and the transition region 2b1 is located between the sealing region 2b2 and the light-emitting region 2a. For example, the sealing auxiliary structure 27 may be provided in the sealing region 2b2. Furthermore, the non-light-emitting region 2b is provided to surround the outer periphery of the light-emitting region 2a.

[0111] In the stretchable display panel 100 according to the embodiment of the present application, the driving layer group 21 is provided with a sealing support structure 27, and the sealing support structure 27 is provided with a trench 271. The encapsulating layer 24 extends to cover the groove wall of the trench 271. The trench 271 reduces the tendency of cracks to extend toward the light-emitting region 2a, while the trench 271 increases the contact area of ​​the encapsulating layer 24, thereby improving the encapsulation performance of the encapsulating layer 24. Furthermore, the encapsulating layer 24 is in direct contact with the inorganic trench 271, i.e., inorganic film layer contacts inorganic film layer, which improves the film layer adhesion of the encapsulating layer 24, thereby further improving the encapsulation performance of the encapsulating layer 24 and the overall sealing reliability of the encapsulating layer 24, thereby improving the service life of the stretchable display panel 100.

[0112] In one embodiment, a plurality of trenches 271 arranged at intervals are provided on the side of the sealing support structure 27 away from the driving layer group 21, and the sealing layer 24 covers the groove walls of the plurality of trenches 271.

[0113] In this way, the trench 271 has a stronger ability to suppress crack propagation and further reduces the tendency of cracks to extend toward the light-emitting region 2a, while the contact area between the sealing layer 24 and the inorganic groove wall is further increased, further improving the film layer adhesion strength of the sealing layer 24, and further improving the overall sealing reliability of the sealing layer 24, which is advantageous for improving the service life of the stretchable display panel 100.

[0114] In a preferred embodiment, the number of trenches 271 is five or more, which can improve the sealing reliability of the sealing layer 24.

[0115] Furthermore, the inventors have found through research that by using the trench 271 arrangement method according to the embodiment of the present application to provide five sets of trenches 271, compared to the structure of the related art in which no trenches 271 are provided, while achieving the same sealing effect, the embodiment of the present application can save approximately 14 μm to 24 μm of width space in the non-light-emitting region 2b, which is advantageous in reducing the width of the sealing frame of the pixel island 2.

[0116] In one embodiment, the orthogonal projection of the encapsulation layer 24 onto the substrate 1 covers the orthogonal projection of the trench 271 onto the substrate 1, i.e., the encapsulation layer 24 covers all groove walls of the trench 271. In this way, the contact area of ​​the encapsulation layer 24 can be increased, and the encapsulation reliability of the encapsulation layer 24 is improved.

[0117] For the arrangement of the trenches 271 in the embodiment of the present application, reference can be made to the arrangement of the recessed grooves 25 shown in FIGS.

[0118] In one embodiment, the encapsulation support structure 27 is disposed around the periphery of the light-emitting region 2 a, and the trench 271 is disposed around the periphery of the light-emitting region 2 a, i.e., the trench 271 is disposed around the periphery of the light-emitting region 2 a, which is advantageous to improve the reliability of the encapsulation around the light-emitting region 2 a and further improve the service life of the stretchable display panel 100.

[0119] In one embodiment, the orthogonal projection of the trench 271 onto the substrate 1 is a closed annular pattern, which can uniformly improve the sealing reliability around the periphery of the light emitting region 2a and ensure high sealing reliability of the encapsulation layer 24.

[0120] For example, the shape of the trench 271 when orthogonally projected onto the substrate 1 may be a rectangular ring, a circular ring, a triangular ring, or the like.

[0121] In one embodiment, the trench 271 includes a plurality of second groove segments, which are spaced apart and surround the outer periphery of the light emitting region 2a.

[0122] In this way, the sealing reliability of the periphery of the light emitting region 2a can be improved, the area occupied by the trench 271 can be reduced, and the etching cost of the trench 271 can be reduced.

[0123] In a preferred embodiment, the plurality of second groove segments are uniformly arranged around the periphery of the light emitting region 2a, thereby uniformly improving the sealing reliability of the periphery of the light emitting region 2a.

[0124] In one embodiment, each of two adjacent trenches 271 includes multiple second trench segments. There is a gap between two adjacent second trench segments in the same trench 271. Of the two adjacent trenches 271, the gap in one trench 271 and the second trench segment in the other trench 271 face each other.

[0125] As a result, the second groove segments of two adjacent trenches 271 are arranged to be offset from each other. In this manner, the area occupied by the trenches 271 can be reduced, and the sealing reliability of the sealing layer 24 can be further improved.

[0126] In one embodiment, trench 271 includes one second main trench and multiple second sub-trenches. The orthogonal projection of the second main trench onto substrate 1 is a closed annular pattern, and the second main trench is arranged to surround the outer periphery of light-emitting region 2a. The multiple second sub-trenches are arranged at intervals around the outer periphery of light-emitting region 2a, and a portion of the orthogonal projection of the second sub-trenches onto substrate 1 overlaps with the orthogonal projection of the second main trench onto substrate 1.

[0127] In this way, the contact area between the sealing layer 24 and the trench 271 can be further increased, improving the sealing reliability of the sealing layer 24.

[0128] In one embodiment, the second sub-trench has a third end and a fourth end opposite to each other, the third end being located on a side of the second main trench closer to the light emitting region 2 a, and the fourth end being located on a side of the second main trench farther from the non-light emitting region 2 b, i.e., the second sub-trench intersects with the second main trench.

[0129] In this way, the contact area between the encapsulation layer 24 and the trench 271 can be further increased, thereby improving the sealing reliability of the encapsulation layer 24. Meanwhile, after the encapsulation layer 24 covers the second sub-trench and the second main trench, the second main trench and the second sub-trench correspond to a "latch structure", and if peeling occurs in the encapsulation layer 24, the latch structure can suppress the expansion of the peeling, or if crack propagation occurs in the encapsulation layer 24, the latch structure can suppress the crack propagation, thereby improving the overall sealing reliability of the encapsulation layer 24 and further improving the service life of the stretchable display panel 100.

[0130] In one embodiment, the dimension of the trench 271 along the first direction X when projected onto the substrate 1 is a third width W3, the distance between two adjacent trenches 271 is a third spacing L3, and the third width W3 is greater than or equal to the third spacing L3.

[0131] The first direction X is perpendicular to the thickness direction of the substrate 1 and perpendicular to the length direction of the orthogonal projection of the trench 271 onto the substrate 1.

[0132] In this way, it is advantageous to reduce the difficulty of etching the trench 271 and to improve the adhesion stability between the sealing layer 24 and the trench 271, while also being advantageous to increase the number of trenches 271 within a limited space.

[0133] In one embodiment, as shown in Figures 12 and 13, at least one protrusion 272 is provided on the side of the sealing support structure 27 that is close to the driving layer group 21, and at least one recess 2131 is provided on the side of the driving layer group 21 that is close to the sealing support structure 27, and the at least one protrusion 272 and the at least one recess 2131 are fitted together.

[0134] By providing the protrusions 272 and the recesses 2131, the contact area between the sealing auxiliary structure 27 and the driving layer group 21 can be increased, the bonding strength between them can be improved, and the stability of the sealing auxiliary structure 27 can be further improved.

[0135] In one embodiment, the sealing support structure 27 has a plurality of protrusions 272 arranged at intervals on the side thereof adjacent to the driving layer group 21, and the driving layer group 21 has a plurality of recesses 2131 on the side thereof adjacent to the sealing support structure 27, and the plurality of protrusions 272 and the plurality of recesses 2131 are fitted together in a one-to-one correspondence.

[0136] This further increases the contact area between the sealing auxiliary structure 27 and the driving layer group 21, further improving the bonding strength therebetween and further improving the stability of the sealing auxiliary structure 27.

[0137] In one embodiment, the sealing support structure 27 is provided with a plurality of trenches 271 arranged at intervals, and the orthogonal projection of one trench 271 onto the actuation layer group 21 overlaps with the orthogonal projection of one protrusion 272 onto the actuation layer group 21. That is, the orthogonal projection of one trench 271 onto the actuation layer group 21 is within the orthogonal projection of one protrusion 272 onto the actuation layer group 21. It may also be understood that the arrangement positions of the trenches 271 and the arrangement positions of the protrusions 272 are opposite to each other.

[0138] In one example, the orthogonal projections of the two trenches 271 onto the driving layer group 21 are both within the orthogonal projections of the same protrusion 272 onto the driving layer group 21 .

[0139] In addition, by providing the protrusion 272 and providing the trench 271 on the side of the protrusion 272 away from the substrate 1, the depth of the trench 271 can be made deeper, which is advantageous in increasing the contact area between the sealing layer 24 and the trench 271 while also increasing the thickness (the dimension of the sealing auxiliary structure 27 along the thickness direction of the substrate 1) at each position of the sealing auxiliary structure 27, thereby ensuring that the structural strength of the sealing auxiliary structure 27 is high and that the sealing auxiliary structure 27 is less likely to break.

[0140] In one embodiment, the trenches 271 and the protrusions 272 correspond one-to-one, and the orthogonal projection of each trench 271 onto the actuation layer group 21 overlaps with the orthogonal projection of the corresponding protrusion 272 onto the actuation layer group 21. That is, the trenches 271 and the protrusions 272 are provided on both sides of the sealing support structure 27, facing each other.

[0141] In this way, it is advantageous to increase the thickness (the dimension of the sealing auxiliary structure 27 along the thickness direction of the substrate 1) at each position of the sealing auxiliary structure 27, which ensures that the structural strength of the sealing auxiliary structure 27 is high and the sealing auxiliary structure 27 is less likely to break.

[0142] In one embodiment, the driving layer group 21 includes a planarization layer 213 , and the recessed portion 2131 is provided on the surface of the planarization layer 213 that faces away from the substrate 1 .

[0143] In one example, the pixel island 2 further includes a pixel-defining structure 22 provided on a surface of the planarization layer 213 facing away from the substrate 1 and defining a pixel opening located in the light-emitting region 2a. The light-emitting unit 23 is provided within the pixel opening.

[0144] In one embodiment, along the thickness direction of the substrate 1, the recess 2131 has a dimension H1, the planarization layer 213 has a dimension H2, and H1 and H2 satisfy the relationship H1≦0.5H2.

[0145] In this way, it is possible to prevent the thickness of the planarization layer 213 directly below the recessed portion 2131 from becoming thin, ensuring the structural strength of the planarization layer 213 and making the planarization layer 213 less likely to break.

[0146] 14, the surface of the sealing assist structure 27 that is close to the driving layer group 21 is flat, which can reduce the difficulty of manufacturing the sealing assist structure 27.

[0147] In one embodiment, the stretchable display panel 100 includes a pixel-defining structure 22, which is disposed in a driving layer group 21 and defines a pixel opening located in the light-emitting region 2a. A light-emitting unit 23 is disposed within the pixel opening. A surface of the pixel-defining structure 22 adjacent to the driving layer group 21 is flush with a surface of the encapsulation support structure 27 adjacent to the driving layer group 21. This allows the encapsulation support structure 27 and the pixel-defining structure 22 to be fabricated on the surface of the same film layer, preventing the encapsulation support structure 27 from adversely affecting the circuit layout and film layer layout in the driving layer group 21.

[0148] In a specific embodiment, the driving layer group 21 includes a planarization layer 213 , and the sealing assist structure 27 and the pixel defining structure 22 are provided on the surface of the planarization layer 213 that is remote from the substrate 1 .

[0149] In one embodiment, the pixel defining structures 22 are adjacent to the encapsulation assist structures 27. This advantageously allows the encapsulation layer 24 to extend from the surface of the pixel defining structures 22 to the surface of the encapsulation assist structures 27, forming a continuous film layer structure.

[0150] In one embodiment, the driving layer group 21 includes a main body portion 2111 and an edge portion 2112 connected to the main body portion 2111. The light emitting unit 23 is provided in the main body portion 2111. The edge portion 2112 is provided with at least one protective structure 26, which has at least one recess 26a, and the sealing layer 24 further covers the wall surface of the recess 26a.

[0151] Here, the protective structure 26 is a structure that suppresses the progression of cracks to the main body portion 2111, and specifically, the protective structure 26 suppresses the progression of cracks via the recessed portion 26a.

[0152] In the present embodiment, the recesses 26a can reduce the tendency of cracks to propagate toward the main body portion 2111 while increasing the contact area of ​​the sealing layer 24, thereby improving the overall sealing reliability of the sealing layer 24 and further improving the service life of the stretchable display panel 100.

[0153] In one embodiment, the dimensions of the main body portion 2111 are greater than the dimensions of the edge portion 2112 along the thickness direction of the substrate 1 , ie the thickness of the main body portion 2111 is greater than the thickness of the edge portion 2112 .

[0154] In one example, the driving layer group 21 includes a base 211, which is provided on a substrate 1, and other film layers of the driving layer group 21, such as a barrier layer 217, a buffer layer 218, a gate insulating layer 215, a capacitance insulating layer 216, an interlayer insulating layer 212, and a planarization layer 213, are stacked on the base 211.

[0155] Specifically, the main body portion 2111 and the edge portion 2112 are provided on the base 211. As a result, after the base 211 is manufactured, the edge portion 2112 can be formed by thinning the edge of the base 211, and the area that is not thinned is the main body portion 2111.

[0156] In addition, when peeling the pixel island 2 from the glass substrate, cracks are likely to occur in the sealing layer 24 at the edge portion 2112 of the pixel island 2. The protective structure 26 can prevent cracks in the sealing layer 24 at the edge portion 2112 of the pixel island 2 from extending to the side walls of the main body portion 2111 and the light-emitting region 2a. The protective structure 26 has the effect of preventing and suppressing the extension of cracks, effectively protecting the sealing layer 24 on the side walls and top surface of the pixel island 2 and improving sealing reliability.

[0157] In one embodiment, the stretchable display panel 100 includes a pixel-defining structure 22 disposed in the body portion 2111, the pixel-defining structure 22 defining a pixel opening located in the light-emitting region 2a. A light-emitting unit 23 is disposed within the pixel opening. An encapsulating layer 24 further covers the side surfaces of the pixel-defining structure 22 and the side surfaces of the body portion 2111. Specifically, the encapsulating layer 24 extends along the top surface of the pixel-defining structure 22 toward the edge portion 2112, covering the side surfaces of the pixel-defining structure 22 and the side surfaces of the body portion 2111 along the extending path. In this way, the contact area of ​​the encapsulating layer 24 can be increased, and the sealing reliability of the encapsulating layer 24 can be improved.

[0158] In one embodiment, the edge portion 2112 is provided around the outer periphery of the main body portion 2111 , and the protective structure 26 is provided around the outer periphery of the main body portion 2111 .

[0159] This is advantageous in improving the sealing reliability around the light emitting region 2a and further improving the protection performance of the protective structure .

[0160] In one embodiment, as shown in FIG. 2, the edge portion 2112 is provided with a plurality of protective structures 26 spaced apart, and the encapsulating layer 24 covers the recesses 26a of each protective structure 26.

[0161] In this way, increasing the number of protective structures 26 is equivalent to providing multiple layers of protection, and it is possible to further improve the sealing reliability and protective performance.

[0162] In one embodiment, of two adjacent protective structures 26, one protective structure 26 is provided to surround the outer periphery of the main body portion 2111, and the other protective structure 26 is provided to surround the outer periphery of the one protective structure 26.

[0163] This allows the two protective structures 26 to be nested around the outer periphery of the light-emitting region 2a, which is advantageous in forming a ring-shaped multi-layer protective structure 26 that is connected to each other around the outer periphery of the light-emitting region 2a, further improving sealing reliability and protective performance.

[0164] In one embodiment, as shown in FIG. 8, the protective structure 26 includes a plurality of substructures 26b, which are spaced apart and arranged around the outer periphery of the main body portion 2111.

[0165] In this way, the sealing reliability of the periphery of the light emitting region 2a can be improved, and the area occupied by the protective structure 26 can be reduced.

[0166] In a preferred embodiment, the plurality of sub-structures 26b are uniformly arranged around the periphery of the light emitting region 2a, thereby uniformly improving the sealing reliability of the periphery of the light emitting region 2a.

[0167] 8 , in two adjacent protective structures 26, each protective structure 26 includes multiple substructures 26b, and there is a gap between two adjacent substructures 26b in the same protective structure 26. Of the two adjacent protective structures 26, the gap in one protective structure 26 faces the substructure 26b in the other protective structure 26.

[0168] As a result, the substructures 26b of two adjacent protective structures 26 are arranged to be offset from each other. In this manner, the area occupied by the protective structures 26 can be reduced, and the sealing reliability of the sealing layer 24 can be further improved.

[0169] In one embodiment, as shown in FIG. 2, the dimension of the protection structure 26 along the first direction X when projected onto the substrate 1 is a second width W2, the distance between two adjacent protection structures 26 is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2.

[0170] The first direction X is perpendicular to the thickness direction of the substrate 1 and perpendicular to the length direction of the protection structure 26 .

[0171] In this way, it is advantageous to improve the adhesion stability between the sealing layer 24 and the protective structure 26 and reduce the space occupied by the protective structure 26, while also advantageous to deposit the sealing layer 24 between two adjacent protective structures 26, thereby ensuring good contact between the structures between the sealing layer 24 and the two protective structures 26 and improving the sealing reliability of the sealing layer 24.

[0172] In the embodiment of the present application, the recess 26a is located on at least one side of the protective structure 26 in the first direction X. In one example, as shown in Fig. 9, the protective structure 26 has one recess 26a along one side in the first direction X. Specifically, the cross section of the protective structure 26 along the direction perpendicular to the paper surface has a "C" shape.

[0173] In one embodiment, the protective structure 26 has a plurality of recesses 26a, and the encapsulating layer 24 covers the wall surfaces of the recesses 26a. In this way, the crack propagation suppression ability of the protective structure 26 can be further improved, and the contact area between the encapsulating layer 24 and the protective structure 26 can be increased, thereby improving the overall sealing reliability of the encapsulating layer 24 and further improving the service life of the stretchable display panel 100.

[0174] In one embodiment, as shown in FIGS. 10 and 11, the protective structure 26 has two recesses 26a, and the openings of the two recesses 26a are back-to-back with each other.

[0175] In this way, after the sealing layer 24 completely covers the two recesses 26a of the protective structure 26, on the one hand, when a crack propagates along the sealing layer 24, the crack propagation path is bent, increasing the difficulty of crack propagation and suppressing the crack propagation; on the other hand, when peeling occurs in the sealing layer 24, the two recesses 26a of the protective structure 26 form a "latch structure" that locks the sealing layer 24 and reduces the tendency for peeling to occur in the sealing layer 24.

[0176] 10 , the protective structure 26 includes a first portion 261 and a second portion 262 sequentially stacked on an edge portion 2112, and both opposing ends of the second portion 262 along a first direction X protrude from the sidewall of the first portion 261. The first direction X is perpendicular to the thickness direction of the substrate 1. The protruding portions of the first portion 261 and the second portion 262 and the edge portion 2112 define a recess 26a. This allows the structure of the protective structure 26 to be simplified.

[0177] Specifically, as shown in FIG. 10, the protective structure 26 has a "T" shaped cross section taken along a direction perpendicular to the paper surface.

[0178] 11 , the protective structure 26 includes a third portion 263, a first portion 261, and a second portion 262 sequentially stacked on the edge portion 2112. Opposite ends of the third portion 263 along the first direction X protrude from the sidewalls of the first portion 261. Opposite ends of the second portion 262 along the first direction X protrude from the sidewalls of the first portion 261. The first direction X is perpendicular to the thickness direction of the substrate 1. The protruding portion of the third portion 263 and the protruding portions of the first portion 261 and the second portion 262 define a recess 26a. This increases the contact area between the protective structure 26 and the sealing layer 24, which is advantageous for improving the adhesion stability between the protective structure 26 and the sealing layer 24.

[0179] Specifically, as shown in FIG. 11, the protective structure 26 has an "H"-shaped cross section taken along a direction perpendicular to the paper surface.

[0180] In one embodiment, the material of the third portion 263 is the same as the material of the second portion 262 .

[0181] In one embodiment, the material of the third portion 263 is different from the material of the first portion 261 .

[0182] In one embodiment, the material of the third portion 263 includes titanium, and the material of the first portion 261 includes aluminum. That is, the protective structure 26 is a three-layer metal structure of titanium aluminum titanium. This allows the protective structure 26 to be formed by side etching the layered metals. Note that the protective structure 26 may also be made of layered metals of other materials.

[0183] 12 and 14, the stretchable display panel 100 further includes connecting lines 3 connecting adjacent pixel islands 2. The driving layer group 21 includes wiring 214 electrically connected to the connecting lines 3. Illustratively, the driving layer group 21 includes a pixel driving circuit, and one end of the wiring 214 is connected to the pixel driving circuit and the other end is connected to the connecting lines 3, i.e., the connecting lines 3 and the wiring 214 electrically connect the pixel driving circuits of adjacent pixel islands 2.

[0184] In one example, the wiring 214 is provided between the interlayer insulating layer 212 and the planarizing layer 213 .

[0185] In addition, a third metal layer (M3) is provided between the interlayer insulating layer 212 and the planarization layer 213, and some lead wires of the pixel driving circuit are usually provided on the third metal layer. In the embodiment of the present application, the wiring 214 is also located on the third metal layer, which can reduce the manufacturing process of the stretchable display panel 100 and lower the manufacturing cost.

[0186] Furthermore, compared to the display panel according to the first embodiment, the display panel according to the second embodiment improves the adverse effect of the arrangement of the trenches 271 on the wiring 214 of the driving layer group 21, and can reduce the manufacturing costs of the display panel.

[0187] 2, 12 and 14, an embodiment of the present application provides yet another stretchable display panel 100 including a substrate 1 and a plurality of pixel islands 2. The plurality of pixel islands 2 are spaced apart on the substrate 1. Each pixel island 2 has a light-emitting region 2a and a non-light-emitting region 2b adjacent to the light-emitting region 2a. Illustratively, the substrate 1 is a flexible substrate 1 having tensile properties.

[0188] Specifically, the pixel island 2 includes a driving layer group 21, a pixel defining structure 22, a light-emitting unit 23, and a sealing layer 24. The driving layer group 21 is provided on the substrate 1 and includes a main body portion 2111 and an edge portion 2112 connected to the main body portion 2111. The light-emitting unit 23 is provided in the main body portion 2111. The protective structure 26 is provided on the edge portion 2112 and has at least one recess 26a. The sealing layer 24 covers the side of the light-emitting unit 23 facing away from the substrate 1 and the wall surface of the recess 26a.

[0189] Specifically, the sealing layer 24 is an inorganic sealing layer. The sealing layer 24 extends from the surface of the light-emitting unit 23 toward the edge portion 2112, and covers the surface of the protective structure 26 and the wall surface of the recess 26a.

[0190] Here, the protective structure 26 is a structure that suppresses the progression of cracks to the main body portion 2111, and specifically, the protective structure 26 suppresses the progression of cracks via the recessed portion 26a.

[0191] In the stretchable display panel 100 according to the embodiment of the present application, a protective structure 26 is provided on the edge portion 2112, and a recess 26a is provided in the protective structure 26. The sealing layer 24 extends to cover the wall surface of the recess 26a. This allows the recess 26a to reduce the tendency of cracks to propagate toward the main body portion 2111, while increasing the contact area of ​​the sealing layer 24, thereby improving the overall sealing reliability of the sealing layer 24 and further increasing the service life of the stretchable display panel 100.

[0192] In one example, the driving layer group 21 has a base 211 and is provided on the substrate 1 via the base 211. In another example, the driving layer group 21 does not have a base 211, that is, the driving layer group 21 is provided directly on the substrate 1. At this time, a stretching region and a pixel region may be provided on the substrate 1, and the driving layer group 21 is provided in the pixel region, and when stretched, the stretching region is stretched and the pixel region is not stretched.

[0193] In one embodiment, the dimensions of the main body portion 2111 are greater than the dimensions of the edge portion 2112 along the thickness direction of the substrate 1 , ie the thickness of the main body portion 2111 is greater than the thickness of the edge portion 2112 .

[0194] In one example, the driving layer group 21 includes a base 211, which is provided on a substrate 1, and other film layers of the driving layer group 21, such as a barrier layer 217, a buffer layer 218, a gate insulating layer 215, a capacitance insulating layer 216, an interlayer insulating layer 212, and a planarization layer 213, are stacked on the base 211.

[0195] Specifically, the main body portion 2111 and the edge portion 2112 are provided on the base 211. As a result, after the base 211 is manufactured, the edge portion 2112 can be formed by thinning the edge of the base 211, and the area that is not thinned is the main body portion 2111.

[0196] In addition, when peeling the pixel island 2 from the glass substrate, cracks are likely to occur in the sealing layer 24 at the edge portion 2112 of the pixel island 2. The protective structure 26 can prevent cracks in the sealing layer 24 at the edge portion 2112 of the pixel island 2 from extending to the side walls of the main body portion 2111 and the light-emitting region 2a. The protective structure 26 has the effect of preventing and suppressing the extension of cracks, effectively protecting the sealing layer 24 on the side walls and top surface of the pixel island 2 and improving sealing reliability.

[0197] In one embodiment, the stretchable display panel 100 includes a pixel defining structure 22, which is disposed in the body portion 2111 and defines a pixel opening located in the light-emitting region 2a, with the light-emitting unit 23 disposed within the pixel opening. An encapsulating layer 24 further covers the side surfaces of the pixel defining structure 22 and the side surfaces of the body portion 2111. Specifically, the encapsulating layer 24 extends along the top surface of the pixel defining structure 22 toward the edge portion 2112, covering the side surfaces of the pixel defining structure 22 and the side surfaces of the body portion 2111 along the extending path. In this way, the contact area of ​​the encapsulating layer 24 can be increased, and the sealing reliability of the encapsulating layer 24 can be improved.

[0198] In one embodiment, the edge portion 2112 is provided around the outer periphery of the main body portion 2111 , and the protective structure 26 is provided around the outer periphery of the main body portion 2111 .

[0199] This is advantageous in improving the sealing reliability around the light emitting region 2a and further improving the protection performance of the protective structure .

[0200] In one embodiment, as shown in FIG. 2, the edge portion 2112 is provided with a plurality of protective structures 26 spaced apart, and the encapsulating layer 24 covers the recesses 26a of each protective structure 26.

[0201] In this way, increasing the number of protective structures 26 is equivalent to providing multiple layers of protection, and it is possible to further improve the sealing reliability and protective performance.

[0202] In one embodiment, of two adjacent protective structures 26, one protective structure 26 is provided to surround the outer periphery of the main body portion 2111, and the other protective structure 26 is provided to surround the outer periphery of the one protective structure 26.

[0203] This allows the two protective structures 26 to be nested around the outer periphery of the main body 2111, which is advantageous in forming a ring-shaped multi-layer protective structure 26 that is connected to each other around the outer periphery of the main body 2111, further improving sealing reliability and protective performance.

[0204] 7 , two protective structures 26 are provided on the edge portion 2112, and the two protective structures 26 are nested within each other to surround the outer periphery of the main body portion 2111. This is equivalent to doubly coating the light-emitting units 23 and other organic film layers on the main body portion 2111, which can effectively prevent water vapor from entering the main body portion 2111 from the edge portion 2112 and the progression of cracks from the edge portion 2112 to the main body portion 2111.

[0205] In one embodiment, as shown in FIG. 8, the protective structure 26 includes a plurality of substructures 26b, which are spaced apart and arranged around the outer periphery of the main body portion 2111.

[0206] In this way, the sealing reliability of the periphery of the light emitting region 2a can be improved, and the area occupied by the protective structure 26 can be reduced.

[0207] In a preferred embodiment, the plurality of sub-structures 26b are uniformly arranged around the periphery of the light emitting region 2a, thereby uniformly improving the sealing reliability of the periphery of the light emitting region 2a.

[0208] 8 , in two adjacent protective structures 26, each protective structure 26 includes multiple substructures 26b, and there is a gap between two adjacent substructures 26b in the same protective structure 26. Of the two adjacent protective structures 26, the gap in one protective structure 26 faces the substructure 26b in the other protective structure 26.

[0209] As a result, the substructures 26b of two adjacent protective structures 26 are arranged to be offset from each other. In this manner, the area occupied by the protective structures 26 can be reduced, and the sealing reliability of the sealing layer 24 can be further improved.

[0210] In one embodiment, as shown in FIG. 2, the dimension of the protection structure 26 along the first direction X when projected onto the substrate 1 is a second width W2, the distance between two adjacent protection structures 26 is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2.

[0211] The first direction X is perpendicular to the thickness direction of the substrate 1 and perpendicular to the length direction of the protection structure 26 .

[0212] In this way, it is advantageous to improve the adhesion stability between the sealing layer 24 and the protective structure 26 and reduce the space occupied by the protective structure 26, while also advantageous to deposit the sealing layer 24 between two adjacent protective structures 26, thereby ensuring good contact between the structures between the sealing layer 24 and the two protective structures 26 and improving the sealing reliability of the sealing layer 24.

[0213] In the embodiment of the present application, the recess 26a is located on at least one side of the protective structure 26 in the first direction X. In one example, as shown in Fig. 9, the protective structure 26 has one recess 26a along one side in the first direction X. Specifically, the cross section of the protective structure 26 along the direction perpendicular to the paper surface has a "C" shape.

[0214] In one embodiment, the protective structure 26 has a plurality of recesses 26a, and the encapsulating layer 24 covers the wall surfaces of the recesses 26a. In this way, the crack propagation suppression ability of the protective structure 26 can be further improved, and the contact area between the encapsulating layer 24 and the protective structure 26 can be increased, thereby improving the overall sealing reliability of the encapsulating layer 24 and further improving the service life of the stretchable display panel 100.

[0215] In one embodiment, as shown in FIGS. 10 and 11, the protective structure 26 has two recesses 26a, and the openings of the two recesses 26a are back-to-back with each other.

[0216] In this way, after the sealing layer 24 completely covers the two recesses 26a of the protective structure 26, on the one hand, when a crack propagates along the sealing layer 24, the crack propagation path is bent, increasing the difficulty of crack propagation and suppressing the crack propagation; on the other hand, when peeling occurs in the sealing layer 24, the two recesses 26a of the protective structure 26 form a "latch structure" that locks the sealing layer 24 and reduces the tendency of the sealing layer 24 to peel off.

[0217] In one embodiment, the protective structure 26 includes a first portion 261 and a second portion 262 sequentially stacked on the edge portion 2112, and both opposing ends of the second portion 262 along the first direction X protrude from the sidewall of the first portion 261. The first direction X is perpendicular to the thickness direction of the substrate 1. The protruding portions of the first portion 261 and the second portion 262 and the edge portion 2112 define a recess 26a. This allows the structure of the protective structure 26 to be simplified.

[0218] Specifically, as shown in FIG. 10, the protective structure 26 has a "T" shaped cross section taken along a direction perpendicular to the paper surface.

[0219] 11 , the protective structure 26 includes a third portion 263, a first portion 261, and a second portion 262 sequentially stacked on the edge portion 2112. Opposite ends of the third portion 263 along the first direction X protrude from the sidewalls of the first portion 261. Opposite ends of the second portion 262 along the first direction X protrude from the sidewalls of the first portion 261. The first direction X is perpendicular to the thickness direction of the substrate 1. The protruding portion of the third portion 263 and the protruding portions of the first portion 261 and the second portion 262 define a recess 26a. This increases the contact area between the protective structure 26 and the sealing layer 24, which is advantageous for improving the adhesion stability between the protective structure 26 and the sealing layer 24.

[0220] Specifically, as shown in FIG. 11, the protective structure 26 has an "H"-shaped cross section taken along a direction perpendicular to the paper surface.

[0221] In one embodiment, the material of the third portion 263 is the same as the material of the second portion 262 .

[0222] In one embodiment, the material of the third portion 263 is different from the material of the first portion 261 .

[0223] In one embodiment, the material of the third portion 263 includes titanium, and the material of the first portion 261 includes aluminum.

[0224] That is, the protective structure 26 is a structure made of three layers of metal, titanium aluminum titanium. This allows the layered metals to be side-etched to form the protective structure 26. Note that the protective structure 26 may also be made of layered metals made of other materials.

[0225] The material of the protective structure 26 may be an inorganic material, which can improve the adhesive strength between the sealing layer 24 and the protective structure 26 and further improve the sealing reliability.

[0226] In one embodiment, the driving layer group 21 includes a base 211 and a functional layer group provided on the base 211. The base 211 is provided with a main body portion 2111 and an edge portion 2112. Thus, after manufacturing the base 211, thinning the edge of the base 211 can form the edge portion 2112, and the area that is not thinned is the main body portion 2111.

[0227] Furthermore, the sealing layer 24 further covers the side surfaces of the functional layer group. That is, the sealing layer 24 extends toward the edge portion 2112 and covers the side surfaces of the functional layer group along the extension path. In this way, the contact area of ​​the sealing layer 24 can be increased, and the sealing reliability of the sealing layer 24 can be improved.

[0228] In one embodiment, the functional layer group includes a barrier layer 217 and a buffer layer 218 stacked one on the other, and the barrier layer 217 is located between the base 211 and the buffer layer 218. The encapsulation layer 24 further covers the side surfaces of the barrier layer 217 and the buffer layer 218. That is, the encapsulation layer 24 extends toward the edge portion 2112 and covers the side surfaces of the barrier layer 217 and the buffer layer 218 along the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, and the encapsulation reliability of the encapsulation layer 24 can be improved.

[0229] In one embodiment, the functional layer group further includes a gate insulating layer 215 provided on a side of the buffer layer 218 away from the base 211, and the encapsulation layer 24 further covers the side surface of the gate insulating layer 215. That is, the encapsulation layer 24 extends toward the edge portion 2112 and covers the side surface of the gate insulating layer 215 along the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, and the encapsulation reliability of the encapsulation layer 24 can be improved.

[0230] In one embodiment, the functional layer group further includes a capacitor insulating layer 216 provided on a side of the gate insulating layer 215 away from the base 211, and the encapsulation layer 24 further covers the side surface of the capacitor insulating layer 216. That is, the encapsulation layer 24 extends toward the edge portion 2112 and covers the side surface of the capacitor insulating layer 216 along the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, and the sealing reliability of the encapsulation layer 24 can be improved.

[0231] In one embodiment, the functional layer group further includes an interlayer insulating layer 212 provided on a side of the capacitive insulating layer 216 away from the base 211, and the encapsulating layer 24 further covers the side surface of the interlayer insulating layer 212. That is, the encapsulating layer 24 extends toward the edge portion 2112 and covers the side surface of the interlayer insulating layer 212 along the extension path. In this way, the contact area of ​​the encapsulating layer 24 can be increased, and the sealing reliability of the encapsulating layer 24 can be improved.

[0232] In one embodiment, the functional layer group further includes a planarization layer 213 provided on a side of the interlayer insulating layer 212 away from the base 211, and the encapsulation layer 24 further covers the side surfaces of the planarization layer 213. That is, the encapsulation layer 24 extends toward the edge portion 2112 and covers the side surfaces of the planarization layer 213 along the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, and the sealing reliability of the encapsulation layer 24 can be improved.

[0233] In addition, the stretchable display panel 100 according to the third aspect may further include other features of the stretchable display panel 100 according to the first aspect, or may further include other features of the stretchable display panel 100 according to the second aspect, and detailed explanations will not be repeated in the embodiments of the present application.

[0234] In a fourth aspect, an embodiment of the present application provides a display device including a stretchable display panel according to any one of the first, second or third aspects.

[0235] The display device may be a smart wearable display device, a laptop, a mobile phone, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 player, a video camera, a game console, a wristwatch, a clock, a calculator, a television monitor, a flat panel display, a computer monitor, a car display (e.g., an odometer display, etc.), a car navigation system, an in-vehicle controller and / or display, a camera view display (e.g., a rearview camera display in a vehicle), an electronic photograph, an electronic billboard or billboard, a projector, etc.

[0236] The display device according to the embodiments of the present application can reduce the tendency of cracks to extend towards the light-emitting units, while increasing the contact area of ​​the sealing layer, thereby improving the overall sealing reliability and further increasing the service life of the display device.

[0237] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but all such combinations should be considered to fall within the scope of the present specification unless there is a contradiction. [Explanation of symbols]

[0238] 100 stretchable display panel, 1 substrate, 2 pixel island, 2a light-emitting region, 2b non-light-emitting region, 2b1 transition region, 2b2 sealing region, 21 driving layer group, 211 base, 2111 main body portion, 2112 edge portion, 212 interlayer insulating layer, 213 planarization layer, 2131 recess portion, 214 wiring, 2141 first wiring portion, 2142 second wiring portion, 2143 third wiring portion, 2144 first via hole structure, 2145 second via hole structure, 215 gate insulating layer, 216 capacitance insulating layer, 217 barrier layer, 218 buffer layer, 219 gate electrode, 22 pixel defining structure, 23 light-emitting unit, 231 first electrode, 232 light-emitting function portion, 233 second electrode, 24 sealing layer, 25 groove, 251 First groove segment, 252 first main groove, 253 first sub-groove, 253a first end, 253b second end, 26 protective structure, 26a recess, 26b sub-structure, 261 first part, 262 second part, 263 third part, 27 sealing auxiliary structure, 271 trench, 272 protrusion, 3 connecting line.

Claims

1. A substrate; a plurality of pixel islands provided on the substrate at intervals, the pixel islands having a light-emitting region and a non-light-emitting region adjacent to the light-emitting region, the pixel islands comprising: a driving layer group provided on the substrate; a pixel definition structure provided in the driving layer group and defining a pixel opening located in the light-emitting region, wherein at least one groove located in the non-light-emitting region is further provided on a side of the pixel definition structure away from the driving layer group, the groove penetrating the pixel definition structure and a portion of the driving layer group along a thickness direction of the substrate; a light-emitting unit disposed within the pixel aperture; a sealing layer that covers a side of the light-emitting unit that is away from the substrate and a groove wall of the groove; the driving layer group includes a body portion and an edge portion connected to the body portion, the pixel defining structure and the light emitting unit are both disposed in the body portion; the edge portion is provided with at least one protective structure, the protective structure having at least one recess, the sealing layer further covering a wall surface of the recess; a dimension of the main body portion is greater than a dimension of the edge portion along a thickness direction of the substrate; The stretchable display panel, wherein the sealing layer further covers a side surface of the pixel defining structure and a side surface of the main body.

2. the driving layer group includes an inorganic film layer and an organic film layer, the inorganic film layer being provided between the substrate and the organic film layer; the groove penetrates at least the organic film layer to expose a portion of the inorganic film layer, and the sealing layer covers the exposed surface of the inorganic film layer; the groove penetrates a portion of the inorganic film layer; 2. The stretchable display panel of claim 1, wherein the driving layer group includes an interlayer insulating layer and a planarizing layer, the interlayer insulating layer is located between the substrate and the planarizing layer, the interlayer insulating layer is an inorganic film layer, the planarizing layer is an organic film layer, and the groove penetrates the planarizing layer and a portion of the interlayer insulating layer.

3. further including connecting lines connecting adjacent pixel islands, the driving layer group including wiring electrically connected to the connecting lines; 3. The stretchable display panel of claim 2, wherein the wiring includes a first wiring portion and a second wiring portion, one end of the second wiring portion is electrically connected to the first wiring portion and the other end is electrically connected to the connecting line, and the first wiring portion is provided in a layer different from that of the second wiring portion.

4. the first wiring portion is located between the interlayer insulating layer and the planarizing layer, the driving layer group further includes a gate insulating layer and a capacitive insulating layer, the gate insulating layer and the capacitive insulating layer are located between the substrate and the interlayer insulating layer, the gate insulating layer is located between the substrate and the capacitive insulating layer, and the second wiring portion is located between the gate insulating layer and the capacitive insulating layer; the driving layer group further includes a gate electrode located between the gate insulating layer and the capacitance insulating layer, the second wiring portion being provided in the same layer as the gate electrode, a part of an orthogonal projection of the second wiring portion onto the substrate overlaps with an orthogonal projection of the groove onto the substrate; the first wiring portion and the second wiring portion are electrically connected via a first via hole structure; 4. The stretchable display panel according to claim 3, wherein a part of the orthogonal projection of the first wiring portion onto the substrate overlaps with a part of the orthogonal projection of the second wiring portion onto the substrate.

5. the wiring further includes a third wiring portion that electrically connects the second wiring portion and the connection line, the third wiring portion being provided in a layer different from that of the second wiring portion; the third wiring portion is provided in the same layer as the first wiring portion, the third wiring portion and the second wiring portion are electrically connected via a second via hole structure; 4. The stretchable display panel according to claim 3, wherein a part of the orthogonal projection of the third wiring portion onto the substrate overlaps with a part of the orthogonal projection of the second wiring portion onto the substrate.

6. an orthogonal projection of the sealing layer onto the pixel-defining structure to cover the recessed groove; The pixel-defining structure has a plurality of grooves, the plurality of grooves are arranged at intervals in the non-light-emitting region, and the sealing layer covers groove walls of the plurality of grooves; the non-light-emitting region is provided to surround the outer periphery of the light-emitting region, and the recessed groove is provided to surround the outer periphery of the light-emitting region, 6. The stretchable display panel according to claim 1, wherein the orthogonal projection of the groove onto the substrate is a closed annular pattern.

7. The recessed groove includes a plurality of first groove segments, and the plurality of first groove segments are spaced apart to surround the outer periphery of the light-emitting region; In two adjacent grooves, each groove includes a plurality of the first groove segments, and in the same groove, there is a gap between two adjacent first groove segments, and in two adjacent grooves, the gap of one groove and the first groove segment of the other groove face each other, Alternatively, the recessed groove includes a first main groove and a plurality of first sub-grooves, an orthogonal projection of the first main groove onto the substrate is a closed annular pattern, the first main groove is provided to surround an outer periphery of the light emitting region, the plurality of first sub-grooves are provided at intervals to surround the outer periphery of the light emitting region, a portion of the orthogonal projection of the first sub-groove onto the substrate overlaps with the orthogonal projection of the first main groove onto the substrate, the first sub-groove has a first end and a second end provided opposite to each other, the first end being located on a side of the first main groove that is close to the light-emitting region, and the second end being located on a side of the first main groove that is away from the non-light-emitting region; 7. The stretchable display panel according to claim 6.

8. A stretchable display panel as described in any one of claims 1 to 5, characterized in that the edge portion is arranged to surround the outer periphery of the main body portion, and the protective structure is arranged to surround the outer periphery of the main body portion.

9. the edge portion is provided with a plurality of protective structures arranged at intervals, the sealing layer covering recesses of each of the protective structures; one of the two adjacent protective structures is provided to surround the outer periphery of the main body portion, and the other protective structure is provided to surround the outer periphery of the one protective structure; Alternatively, the protective structure includes a plurality of sub-structures, and the plurality of sub-structures are provided around the outer periphery of the main body portion at intervals, 9. The stretchable display panel of claim 8, wherein in two adjacent protective structures, each of the protective structures includes a plurality of the sub-structures, and in the same protective structure, there is a gap between two adjacent sub-structures, and in two adjacent protective structures, the gap in one protective structure and the sub-structure in the other protective structure face each other.

10. the protective structure has a plurality of recesses, and the sealing layer covers wall surfaces of the plurality of recesses; the protective structure has two recesses, and openings of the two recesses are back-to-back with each other; the protection structure includes a first portion and a second portion sequentially stacked on the edge portion, wherein opposite ends of the second portion along a first direction protrude from sidewalls of the first portion, and the first direction is perpendicular to a thickness direction of the substrate; the first portion, the protruding portion of the second portion, and the edge portion define the recess; Alternatively, the protection structure includes a third portion, a first portion, and a second portion sequentially stacked on the edge portion, wherein opposite ends of the third portion along a first direction protrude from side walls of the first portion, and opposite ends of the second portion along the first direction protrude from side walls of the first portion, and the first direction is perpendicular to a thickness direction of the substrate, 10. The stretchable display panel of claim 9, wherein the protruding portion of the third portion, the protruding portions of the first portion, and the protruding portions of the second portion define the recess.

11. A substrate; a plurality of pixel islands provided on the substrate at intervals, the pixel islands having a light-emitting region and a non-light-emitting region adjacent to the light-emitting region, the pixel islands comprising: a driving layer group provided on the substrate; a pixel definition structure provided in the driving layer group and defining a pixel opening located in the light-emitting region, wherein at least one groove located in the non-light-emitting region is further provided on a side of the pixel definition structure away from the driving layer group, the groove penetrating the pixel definition structure and a portion of the driving layer group along a thickness direction of the substrate; a light-emitting unit disposed within the pixel aperture; a sealing layer that covers a side of the light-emitting unit that is away from the substrate and a groove wall of the groove; the driving layer group includes an inorganic film layer and an organic film layer, the inorganic film layer being provided between the substrate and the organic film layer; the groove penetrates at least the organic film layer to expose a portion of the inorganic film layer, and the sealing layer covers the exposed surface of the inorganic film layer; the groove penetrates a portion of the inorganic film layer; the driving layer group includes an interlayer insulating layer and a planarization layer, the interlayer insulating layer is located between the substrate and the planarization layer, the interlayer insulating layer is the inorganic film layer, the planarization layer is the organic film layer, the groove penetrates the planarization layer and a part of the interlayer insulating layer, further including connecting lines connecting adjacent pixel islands, the driving layer group including wiring electrically connected to the connecting lines; the wiring includes a first wiring portion and a second wiring portion, one end of the second wiring portion is electrically connected to the first wiring portion and the other end is electrically connected to the connection line, the first wiring portion is provided in a layer different from that of the second wiring portion, the first wiring portion is located between the interlayer insulating layer and the planarizing layer, the driving layer group further includes a gate insulating layer and a capacitive insulating layer, the gate insulating layer and the capacitive insulating layer are located between the substrate and the interlayer insulating layer, the gate insulating layer is located between the substrate and the capacitive insulating layer, and the second wiring portion is located between the gate insulating layer and the capacitive insulating layer; the driving layer group further includes a gate electrode located between the gate insulating layer and the capacitance insulating layer, the second wiring portion being provided in the same layer as the gate electrode, a part of an orthogonal projection of the second wiring portion onto the substrate overlaps with an orthogonal projection of the groove onto the substrate; A stretchable display panel characterized in that the first wiring portion and the second wiring portion are electrically connected via a first via hole structure, and a portion of the orthogonal projection of the first wiring portion onto the substrate overlaps with the orthogonal projection of the second wiring portion onto the substrate.

12. A substrate; a plurality of pixel islands provided on the substrate at intervals, the pixel islands having a light-emitting region and a non-light-emitting region adjacent to the light-emitting region, the pixel islands comprising: a driving layer group provided on the substrate; a pixel definition structure provided in the driving layer group and defining a pixel opening located in the light-emitting region, wherein at least one groove located in the non-light-emitting region is further provided on a side of the pixel definition structure away from the driving layer group, the groove penetrating the pixel definition structure and a portion of the driving layer group along a thickness direction of the substrate; a light-emitting unit disposed within the pixel aperture; a sealing layer that covers a side of the light-emitting unit that is away from the substrate and a groove wall of the groove; the driving layer group includes an inorganic film layer and an organic film layer, the inorganic film layer being provided between the substrate and the organic film layer; the groove penetrates at least the organic film layer to expose a portion of the inorganic film layer, and the sealing layer covers the exposed surface of the inorganic film layer; the groove penetrates a portion of the inorganic film layer; the driving layer group includes an interlayer insulating layer and a planarization layer, the interlayer insulating layer is located between the substrate and the planarization layer, the interlayer insulating layer is the inorganic film layer, the planarization layer is the organic film layer, the groove penetrates the planarization layer and a part of the interlayer insulating layer, further including connecting lines connecting adjacent pixel islands, the driving layer group including wiring electrically connected to the connecting lines; the wiring includes a first wiring portion, a second wiring portion, and a third wiring portion, one end of the second wiring portion is electrically connected to the first wiring portion and the other end is electrically connected to the connection line, the third wiring portion electrically connects the second wiring portion and the connection line, the first wiring portion and the third wiring portion are provided in a layer different from that of the second wiring portion, the third wiring portion is provided in the same layer as the first wiring portion, A stretchable display panel characterized in that the third wiring portion and the second wiring portion are electrically connected via a second via hole structure, and a portion of the orthogonal projection of the third wiring portion onto the substrate overlaps with the orthogonal projection of the second wiring portion onto the substrate.

13. A substrate; a plurality of pixel islands provided on the substrate at intervals, the pixel islands having a light-emitting region and a non-light-emitting region adjacent to the light-emitting region, the pixel islands comprising: a driving layer group provided on the substrate; a light-emitting unit provided in the driving layer group and positioned in the light-emitting region; an encapsulation auxiliary structure provided in the driving layer group and located in the non-light-emitting region, the encapsulation auxiliary structure having at least one trench on a side away from the driving layer group, the encapsulation auxiliary structure including an inorganic material; a sealing layer covering a side of the light emitting unit away from the substrate and a groove wall of the trench; a surface of the sealing assistance structure adjacent to the driving layer group is flat; The light-emitting element further includes a pixel defining structure, the pixel defining structure being disposed in the driving layer group and defining a pixel opening located in the light-emitting region, the light-emitting unit being disposed in the pixel opening; a surface of the pixel defining structure adjacent to the driving layer group is flush with a surface of the encapsulation assist structure adjacent to the driving layer group; The pixel-defining structure is adjacent to the sealing-assist structure.

14. a plurality of trenches arranged at intervals are provided on a side of the sealing assistance structure away from the driving layer group, and the sealing layer covers groove walls of the plurality of trenches; an orthogonal projection of the encapsulation layer onto the substrate covering an orthogonal projection of the trench onto the substrate; the sealing auxiliary structure is provided to surround the outer periphery of the light emitting region, and the trench is provided to surround the outer periphery of the light emitting region; an orthogonal projection of the trench onto the substrate is a closed annular pattern; Alternatively, the trench includes a plurality of second groove segments, the second groove segments being spaced apart and surrounding the outer periphery of the light emitting region; In two adjacent trenches, each trench includes a plurality of the second trench segments, and in the same trench, there is a gap between two adjacent second trench segments, and in two adjacent trenches, the gap of one trench and the second trench segment of the other trench face each other, Alternatively, the trench includes a second main trench and a plurality of second sub-trenches, an orthogonal projection of the second main trench onto the substrate is a closed annular pattern, the second main trench is provided to surround the outer periphery of the light emitting region, and the plurality of second sub-trenches are provided at intervals to surround the outer periphery of the light emitting region, and a portion of the orthogonal projection of the second sub-trenches onto the substrate overlaps with the orthogonal projection of the second main trench onto the substrate; 14. The display panel of claim 13, wherein the second sub-trench has a third end and a fourth end arranged opposite to each other, the third end being located on a side of the second main trench that is closer to the light-emitting region, and the fourth end being located on a side of the second main trench that is farther from the non-light-emitting region.

15. at least one protrusion is provided on a side of the sealing auxiliary structure that is close to the driving layer group, and at least one recess is provided on a side of the driving layer group that is close to the sealing auxiliary structure, and the at least one protrusion and the at least one recess are fitted together; the sealing assistance structure includes a plurality of trenches arranged at intervals, and an orthogonal projection of one of the recesses onto the driving layer group overlaps with an orthogonal projection of one of the protrusions onto the driving layer group; the driving layer group includes a planarization layer, and the recessed portion is provided on a surface of the planarization layer that faces away from the substrate; 14. The stretchable display panel of claim 13.

16. A substrate, a plurality of pixel islands provided on the substrate at intervals, the pixel islands having a light-emitting region and a non-light-emitting region adjacent to the light-emitting region, the pixel islands comprising: a driving layer group provided on the substrate; a light-emitting unit provided in the driving layer group and positioned in the light-emitting region; an encapsulation auxiliary structure provided in the driving layer group and located in the non-light-emitting region, the encapsulation auxiliary structure having at least one trench on a side away from the driving layer group, the encapsulation auxiliary structure including an inorganic material; a sealing layer covering a side of the light emitting unit away from the substrate and a groove wall of the trench; at least one protrusion is provided on a side of the sealing auxiliary structure that is close to the driving layer group, and at least one recess is provided on a side of the driving layer group that is close to the sealing auxiliary structure, and the at least one protrusion and the at least one recess are fitted together; the sealing assistance structure is provided with a plurality of trenches arranged at intervals, an orthogonal projection of one of the grooves onto the driving layer group overlaps with an orthogonal projection of one of the protrusions onto the driving layer group, the driving layer group includes a planarization layer, and the recessed portion is provided on a surface of the planarization layer away from the substrate; A stretchable display panel characterized by:

17. A substrate, a plurality of pixel islands spaced apart on the substrate, the pixel islands comprising: a driving layer group provided on the substrate and including a main body portion and an edge portion connected to the main body portion; a light-emitting unit provided in the main body; a protective structure provided on the edge portion and having at least one recess; a sealing layer that covers a side of the light-emitting unit that is away from the substrate and a wall surface of the recess, the driving layer group includes a base and a functional layer group provided on the base, the base is provided with the main body portion and the edge portion, and the sealing layer further covers a side surface of the functional layer group; the functional layer group includes a barrier layer and a buffer layer stacked one on the other, the barrier layer being located between the base and the buffer layer, and the sealing layer further covering side surfaces of the barrier layer and the buffer layer; the functional layer group further includes a gate insulating layer provided on a side of the buffer layer away from the base, the sealing layer further covering a side surface of the gate insulating layer; the functional layer group further includes a capacitance insulating layer provided on a side of the gate insulating layer away from the base, the sealing layer further covering a side surface of the capacitance insulating layer, the functional layer group further includes an interlayer insulating layer provided on a side of the capacitive insulating layer away from the base, the sealing layer further covering a side surface of the interlayer insulating layer, A stretchable display panel characterized in that the functional layer group further includes a planarization layer provided on the side of the interlayer insulating layer away from the base, and the sealing layer further covers the side of the planarization layer.

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