Stretchable display panel and stretchable display device

Abstract

This application relates to a stretchable display panel and a stretchable display device. The stretchable display panel includes multiple display islands and multiple stretchable sections. The multiple display islands are spaced apart. The stretchable sections connect two adjacent display islands. Each stretchable section includes at least a first sub-section. The first sub-section connects two adjacent display islands and has a signal line electrically connected to the display islands. The stretching rate of the stretchable section decreases along the direction away from the center region of the first sub-section. This reduces the risk of signal line breakage during the stretching process of the stretchable display panel, ensuring the normal use of the stretchable display panel and improving the display effect and stability of the stretchable display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a stretchable display panel and a stretchable display device. Background Technology

[0002] With the continuous development of flexible display technology, stretchable display panels are gradually being applied in wearable devices, IoT devices, and artificial intelligence, bringing users a brand-new viewing and usage experience.

[0003] In related technologies, a stretchable display panel includes islands with pixel units and a stretching structure for connecting the islands. The stretching structure has signal lines electrically connected to the islands. During the stretching process of the stretchable display panel, the signal lines are prone to breakage, thus affecting the function of the stretchable display panel. Summary of the Invention

[0004] Based on this, this application provides a stretchable display panel and a stretchable display device, aiming to reduce the risk of signal line breakage during the stretching process of the stretchable display panel.

[0005] According to one aspect of this application, a stretchable display panel is provided, comprising a plurality of display islands and a plurality of stretchable portions; the plurality of display islands are spaced apart; the stretchable portions connect two adjacent display islands; each stretchable portion includes at least a first sub-portion; two display islands adjacent to the first sub-portion have signal lines electrically connected to the display islands within the first sub-portion; wherein the stretching rate of the stretchable portion decreases along a direction away from the central region of the first sub-portion.

[0006] The stretchable display panel provided in this application embodiment includes at least a first sub-part in its stretchable portion. The first sub-part connects two adjacent display islands and has signal lines electrically connected to the display islands within it. Along the direction away from the center region of the first sub-part, the stretching rate of the stretchable portion decreases. That is, the tensile strength of the portion of the stretchable portion closer to the center region of the first sub-part is better than that of the portion farther from the center region of the first sub-part. The allowable stretching amount of the portion closer to the center region of the first sub-part is greater than that of the portion farther from the center region of the first sub-part. This reduces the probability of the stretchable portion breaking at the first sub-part when the stretchable display panel is stretched in operation, thereby reducing the probability of signal lines breaking within the first sub-part and improving the display effect and stability of the stretchable display panel.

[0007] In some embodiments, the stretching ratio of the stretching portion decreases along the thickness direction parallel to the display island portion and away from the center region of the first sub-part;

[0008] Optionally, the stretching portion further includes a second sub-portion, which is located on the side of the first sub-portion near the backlight surface of the display island portion. The second sub-portion connects two adjacent display island portions, and the stretching ratio of the second sub-portion is less than that of the first sub-portion.

[0009] Optionally, the stretching portion further includes a third sub-portion, which is located on the side of the first sub-portion near the light-emitting surface of the display island portion, and the third sub-portion connects two adjacent display island portions; the stretching ratio of the third sub-portion is less than that of the first sub-portion;

[0010] Optionally, the stretching ratio of the third sub-part is greater than or equal to the stretching ratio of the second sub-part.

[0011] In some embodiments, the stretching ratio of the stretching portion decreases along a direction parallel to the plane where the display island is located, and along a central region away from the first sub-part;

[0012] Optionally, along a direction parallel to the plane where the display island is located, and away from the center region of the first sub-part, the elongation of the first sub-part decreases;

[0013] Optionally, the stretching portion further includes a second sub-portion, which is located on the side of the first sub-portion near the backlight surface of the display island portion, and the second sub-portion connects two adjacent display island portions; along a direction parallel to the plane where the display island portion is located, and away from the central region of the second sub-portion, the stretching ratio of the second sub-portion decreases;

[0014] Optionally, the stretching portion further includes a third sub-portion, which is located on the side of the first sub-portion near the light-emitting surface of the display island portion, and the third sub-portion connects two adjacent display island portions; along a direction parallel to the plane where the display island portion is located, and away from the central region of the third sub-portion, the stretching ratio of the third sub-portion decreases.

[0015] In some embodiments, the display island includes a pixel island, and the pixel islands of two adjacent display islands are connected by a first sub-section. The pixel island includes at least one pixel unit, and the signal line is electrically connected to the pixel unit.

[0016] Optionally, the first sub-part is disposed on the same layer as at least a portion of the pixel island;

[0017] Optionally, the first sub-part includes an elastic substrate;

[0018] Optionally, the elastic substrate includes a flexible substrate, wherein the flexible substrate is doped with an elastomeric material;

[0019] Optionally, along a direction parallel to the plane where the display island is located, and away from the center region of the first sub-part, the doping concentration of the elastomeric material in the flexible substrate decreases;

[0020] Optionally, the doping concentration of the elastomer material is 7% to 28%;

[0021] Optionally, the maximum elongation of the first sub-part is less than 30%;

[0022] Optionally, the signal line is arc-shaped.

[0023] In some embodiments, the display island further includes an encapsulation unit that covers the top and side surfaces of the pixel island, and two adjacent encapsulation units are connected via the third sub-part.

[0024] Optionally, the packaging unit includes a thin-film packaging layer;

[0025] Optionally, the third sub-part includes a resilient encapsulation layer;

[0026] Optionally, the elastic encapsulation layer comprises an elastomeric material;

[0027] Optionally, along a direction parallel to the plane where the display island is located, and away from the central region of the third sub-part, the doping concentration of the elastomeric material in the elastic encapsulation layer decreases.

[0028] In some embodiments, the packaging unit includes a first sub-packaging portion that covers the top and side surfaces of the pixel island; the third sub-portion includes a first stretch packaging portion that connects two adjacent first sub-packaging portions.

[0029] Optionally, along the thickness direction parallel to the display island portion, the stretching ratio of the first stretching encapsulation portion is less than the stretching ratio of the first sub-portion;

[0030] Optionally, along a direction parallel to the plane where the display island is located, the stretching ratio of the first stretch package decreases away from the center region of the first stretch package.

[0031] Optionally, the first stretch encapsulation portion includes an elastomeric material;

[0032] Optionally, along a direction parallel to the plane where the display island is located, and away from the center region of the first stretch package, the doping concentration of the elastomeric material in the first stretch package decreases;

[0033] Optionally, the doping concentration of the elastomeric material within the first stretching encapsulation portion is 6% to 24%.

[0034] Optionally, the maximum stretch ratio of the first stretchable encapsulation portion is less than 25%.

[0035] In some embodiments, the packaging unit further includes a second sub-packaging portion located on the side of the first sub-packaging portion away from the pixel island; the third sub-portion includes a second stretch packaging portion connecting two adjacent second sub-packaging portions;

[0036] Optionally, along the thickness direction parallel to the display island portion, the stretching ratio of the second stretching encapsulation portion is less than the stretching ratio of the first stretching encapsulation portion;

[0037] Optionally, along a direction parallel to the plane where the display island is located, the stretching ratio of the second stretch package decreases away from the center region of the second stretch package;

[0038] Optionally, the orthographic projection of the second stretching package portion onto the first stretching package portion overlaps with the orthographic projection of the second sub-portion onto the first stretching package portion;

[0039] Optionally, along a direction parallel to the plane where the display island is located, the stretching rate of the second stretching encapsulation portion is the same as the stretching rate of the second sub-portion;

[0040] Optionally, the second stretch encapsulation portion includes an elastomeric material;

[0041] Optionally, along a direction parallel to the plane where the display island is located, the doping concentration of the elastomeric material in the second stretch package decreases away from the center region of the second stretch package;

[0042] Optionally, the doping concentration of the elastomeric material within the second stretching encapsulation portion is 5% to 20%;

[0043] Optionally, the maximum stretch ratio of the second stretchable encapsulation portion is less than 20%.

[0044] In some embodiments, the display island portion further includes a first protective portion located on the side of the pixel island near the backlight surface of the display island portion, and two adjacent first protective portions are connected by a second sub-portion;

[0045] Optionally, the first protective part and the second sub-part are arranged on the same layer;

[0046] Optionally, the second sub-part includes an elastic protection part;

[0047] Optionally, the elastic protective part includes an elastomeric material;

[0048] Optionally, along a direction parallel to the plane where the display island is located, and away from the center region of the second sub-section, the doping concentration of the elastomeric material in the elastic protection section decreases;

[0049] Optionally, the doping concentration of the elastomeric material in the elastic protective part is 5% to 20%;

[0050] Optionally, the maximum stretch of the second sub-section is less than 20%.

[0051] In some embodiments, an adhesive layer is also included, the adhesive layer being disposed between the first protective portion and the pixel island;

[0052] Optionally, the adhesive layer includes optical adhesive.

[0053] According to another aspect of this application, a stretchable display device is provided, including the stretchable display panel described in any of the above embodiments. This improves the display effect and stability of the stretchable display device. Attached Figure Description

[0054] Figure 1 This is a top view of the stretchable display panel in some embodiments of this application.

[0055] Figure 2 This is a schematic diagram of the structure of a stretchable display panel in some embodiments of this application.

[0056] Figure 3 for Figure 2 The diagram shows the structure of the stretchable display panel in a stretched state.

[0057] Figure 4 This is a cross-sectional schematic diagram of the first sub-part, second sub-part, or third sub-part in some embodiments of this application.

[0058] Figure 5 This is a structural schematic diagram of the stretchable display panel in some embodiments of this application during the manufacturing process.

[0059] Figure 6 for Figure 5 The diagram shows the structure of the stretchable display panel in a stretched state.

[0060] Explanation of reference numerals in the attached figures:

[0061] 10. Stretchable display panel; 11. Display island; 11a. Light-emitting surface; 11b. Backlight surface; 111. Pixel island; 1111. Pixel unit; 1111a. First electrode; 1111b. Light-emitting functional part; 1111c. Second electrode; 1112. First substrate; 1113. Driving circuit layer; 112. Packaging unit; 1121. First sub-packaging part; 1122. Second sub-packaging part; 113. First protective part; 12. Stretchable part; 12a. Signal line; 121. First sub-part; 122. Second sub-part; 123. Third sub-part; 1231. First stretchable packaging part; 1232. Second stretchable packaging part; 13. Adhesive layer; 21. Second substrate; 22. Laser release layer. Detailed Implementation

[0062] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0064] When describing positional relationships, unless otherwise specified, when an element such as a layer, film, or substrate is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements present. Furthermore, when a layer is referred to as being "below" another layer, it may be directly below it or there may be one or more light-emitting units present. It is also understood that when a layer is referred to as being "between" two layers, it may be the only layer between the two layers, or there may be one or more light-emitting units present.

[0065] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0066] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0067] It should also be understood that, in interpreting an element, although not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of a particular value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0068] Furthermore, in the instruction manual, the phrase "planar distribution diagram" refers to the diagram when the target part is viewed from above, and the phrase "cross-sectional diagram" refers to the diagram when the target part is viewed from the side as a cross-section taken by vertically cutting the target part.

[0069] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0070] In related technologies, a stretchable display panel includes islands with pixel units and a stretching structure for connecting the islands. The stretching structure has signal lines electrically connected to the islands. During the stretching process of the stretchable display panel, the signal lines are prone to breakage, thus affecting the function of the stretchable display panel.

[0071] In view of the above-mentioned technical problems, this application provides a stretchable display panel and a stretchable display device, which aims to reduce the risk of signal line breakage during the stretching process of the stretchable display panel.

[0072] Firstly, see Figure 1 and Figure 2 This application provides a stretchable display panel 10, including a plurality of display islands 11 and a plurality of stretchable portions 12; the plurality of display islands 11 are spaced apart; the stretchable portions 12 connect two adjacent display islands 11; the stretchable portion 12 includes at least a first sub-portion 121; the first sub-portion 121 connects two adjacent display islands 11, and the first sub-portion 121 is provided with a signal line 12a electrically connected to the display islands 11; wherein, along the direction away from the central region of the first sub-portion 121, the stretching rate of the stretchable portion 12 decreases.

[0073] Understandably, both the stretching portion 12 and the first sub-portion 121 are stretchable. The first sub-portion 121 can undergo tensile deformation when subjected to external force and return to its original shape after the external force is removed. The stretching ratio of the stretching portion 12 decreases along the direction away from the center region of the first sub-portion 121. In other words, the stretching ratio of the stretching portion 12 away from the center region of the first sub-portion 121 is less than the stretching ratio of the stretching portion 12 near the center region of the first sub-portion 121. The tensile strength of the portion of the stretching portion 12 near the center region of the first sub-portion 121 is better than that of the portion away from the center region of the first sub-portion 121. The allowable stretching amount of the portion of the stretching portion 12 near the center region of the first sub-portion 121 is greater than the allowable stretching amount of the portion away from the center region of the first sub-portion 121. This reduces the probability of the stretching portion 12 breaking at the first sub-portion 121 when the stretchable display panel 10 is stretched, thereby reducing the probability of the signal line 12a within the first sub-portion 121 breaking. In addition, signal line 12a may specifically include one or more of gate lines, data lines, and power signal lines 12a.

[0074] The stretchable display panel 10 provided in this application embodiment has a stretchable portion 12 that includes at least a first sub-portion 121. The first sub-portion 121 connects two adjacent display island portions 11. The first sub-portion 121 contains a signal line 12a electrically connected to the display island portion 11. Along the direction away from the central region of the first sub-portion 121, the stretching rate of the stretchable portion 12 decreases. That is, the tensile strength of the portion of the stretchable portion 12 near the central region of the first sub-portion 121 is better than that of the portion of the stretchable portion 12 away from the central region of the first sub-portion 121. The allowable stretching amount of the portion of the stretchable portion 12 near the central region of the first sub-portion 121 is greater than that of the portion of the stretchable portion 12 away from the central region of the first sub-portion 121. This reduces the probability of the stretchable portion 12 breaking at the first sub-portion 121 when the stretchable display panel 10 is stretched in the working state, thereby reducing the probability of the signal line 12a breaking in the first sub-portion 121 and improving the display effect and display stability of the stretchable display panel 10.

[0075] See Figure 2 and Figure 3 In some embodiments, the stretching ratio of the stretching portion 12 decreases along the thickness direction parallel to the display island portion 11 and along the central region away from the first sub-portion 121.

[0076] In this way, the tensile strength of the portion of the stretching portion 12 near the center of the first sub-part 121 is better than that of the portion of the stretching portion 12 away from the center of the first sub-part 121 along the thickness direction parallel to the display island portion 11. This reduces the probability of the first sub-part 121 breaking, thereby reducing the probability of the signal lines within the first sub-part 121 breaking and improving the display effect and display stability of the stretchable display panel 10.

[0077] See Figure 2 and Figure 3 In some embodiments, the stretching portion 12 further includes a second sub-portion 122, which is located on the side of the first sub-portion 121 near the backlight surface 11b of the display island portion 11. The second sub-portion 122 connects two adjacent display island portions 11, and the stretching ratio of the second sub-portion 122 is less than that of the first sub-portion 121.

[0078] In this way, the tensile strength of the first sub-part 121 is better than that of the second sub-part 122, and the allowable stretching amount of the first sub-part 121 is greater than that of the second sub-part 122. This makes it less likely that the stretching part 12 will break at the first sub-part 121 when the stretchable display panel is stretched in the working state, thereby reducing the probability of signal line breakage in the first sub-part 121 and improving the display effect and display stability of the stretchable display panel 10.

[0079] See Figure 2 and Figure 3 In some embodiments, the stretching portion 12 further includes a third sub-portion 123, which is located on the side of the first sub-portion 121 near the light-emitting surface 11a of the display island portion 11, and the third sub-portion 123 connects two adjacent display island portions 11; the stretching ratio of the third sub-portion 123 is less than the stretching ratio of the first sub-portion 121.

[0080] Thus, the second sub-part 122 and the third sub-part 123 can protect the first sub-part 121 on both sides along the thickness direction of the display island 11, making the force on both sides of the first sub-part 121 along the thickness direction of the display island 11 more uniform, thereby reducing the probability of the first sub-part 121 breaking when the stretchable display panel 10 is stretched, and thus reducing the probability of the signal line 12a in the first sub-part 121 breaking.

[0081] In a specific example, the stretching ratio of the third sub-part 123 is greater than or equal to the stretching ratio of the second sub-part 122.

[0082] Thus, when the stretching ratio of the third sub-part 123 is greater than that of the second sub-part 122, the tensile strength of the third sub-part 123 is superior to that of the second sub-part 122. This reduces the probability of the film layer near the light-emitting surface 11a of the display island 11 breaking under stress, such as the encapsulation film layer. Consequently, the probability of the stretchable display panel being corroded by water and oxygen is reduced, improving the reliability of the stretchable display panel. When the stretching ratio of the third sub-part 123 is equal to that of the second sub-part 122, the first sub-part 121 is subjected to uniform stress on both sides along the thickness direction parallel to the display island 11. This reduces the probability of the first sub-part 121 breaking when the stretchable display panel 10 is stretched, thereby reducing the probability of the signal line 12a within the first sub-part 121 breaking.

[0083] See Figure 4 In some embodiments, the stretching ratio of the stretching portion 12 decreases along a direction parallel to the plane where the display island portion 11 is located, away from the central region of the first sub-portion 121.

[0084] In this way, the stretching ratio of the stretching part 12 is minimized at the position close to the display island 11, and maximized at the position of the stretching part 12 furthest from the display island 11 (that is, the middle position of the stretching part 12). This ensures that the connection area between the stretching part 12 and the display island 11 is not prone to breakage, and the entire stretchable display panel 10 is subjected to uniform force, thereby improving the display effect and display stability of the stretchable display panel 10.

[0085] See Figure 4 In some embodiments, the stretching ratio of the first sub-part 121 decreases along a direction parallel to the plane where the display island 11 is located, away from the central region of the first sub-part 121.

[0086] In this way, the stretching ratio of the first sub-part 121 is minimized at the position close to the display island 11, and maximized at the position far away from the display island 11. This ensures that the connection area between the first sub-part 121 and the display island 11 is less prone to breakage, and guarantees the reliability of the electrical connection between the signal lines in the first sub-part 121 and the display island 11, thereby improving the display effect and display stability of the stretchable display panel 10.

[0087] See Figures 2 to 4 In some embodiments, the stretching portion 12 further includes a second sub-portion 122, which is located on the side of the first sub-portion 121 near the backlight surface 11b of the display island portion 11. The second sub-portion 122 connects two adjacent display island portions 11. Along a direction parallel to the plane where the display island portion 11 is located, the stretching ratio of the second sub-portion 122 decreases away from the central region of the second sub-portion 122.

[0088] In this way, the stretching ratio of the second sub-part 122 is minimized at the position close to the display island 11, and maximized at the position far away from the display island 11. This ensures that the connection area between the second sub-part 122 and the display island 11 is less prone to breakage, thereby improving the display effect and display stability of the stretchable display panel 10.

[0089] See Figures 2 to 4 In some embodiments, the stretching portion 12 further includes a third sub-portion 123, which is located on the side of the first sub-portion 121 near the light-emitting surface 11a of the display island portion 11. The third sub-portion 123 connects two adjacent display island portions 11. Along a direction parallel to the plane where the display island portion 11 is located, the stretching ratio of the third sub-portion 123 decreases away from the central region of the third sub-portion 123.

[0090] In this way, the stretching ratio of the third sub-part 123 is minimized at the position close to the display island 11, and maximized at the position far away from the display island 11. This ensures that the connection area between the third sub-part 123 and the display island 11 is less prone to breakage, thereby improving the display effect and display stability of the stretchable display panel 10.

[0091] See Figures 2 to 3 In some embodiments, the display island 11 includes a pixel island 111, and the pixel islands 111 of two adjacent display islands 11 are connected by a first sub-section 121. The pixel island 111 includes at least one pixel unit 1111, and the signal line 12a is electrically connected to the pixel unit 1111.

[0092] This ensures the normal display of the stretchable display panel 10.

[0093] Understandably, see Figures 2 to 3 The pixel unit 1111 includes a first electrode 1111a, a light-emitting functional part 1111b, and a second electrode 1111c, which are stacked sequentially along the direction from the backlight surface 11b to the light-emitting surface 11a; the first electrode 1111a is the anode, and the second electrode 1111c is the cathode.

[0094] In a specific example, the light-emitting functional unit 1111b includes multiple functional layers, including an emission layer (EML). It 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 unit 1111b may be a stacked light-emitting layer, that is, it includes at least two light-emitting layers and a charge generation layer (CGL) located between adjacent light-emitting layers.

[0095] For a specific example, see Figures 2 to 3 The pixel island 111 also includes a first substrate 1112 and a driving circuit layer 1113 disposed on the first substrate 1112. The driving circuit layer 1113 includes a pixel driving circuit layer, which includes a thin film transistor. The pixel unit 1111 is disposed on the side of the driving circuit layer 1113 away from the substrate 1. The first electrode 1111a and the second electrode 1111c are both electrically connected to the driving circuit layer 1113.

[0096] In a specific example, the first substrate 1112 includes a substrate, which can be a rigid substrate or a flexible substrate. When the substrate is a rigid substrate, the material of the substrate can be glass or silicon wafer, etc. When the substrate is a flexible substrate, the material of the substrate can be polyimide.

[0097] See Figures 2 to 3 In some embodiments, the first sub-part 121 is disposed on at least a portion of the pixel island 111. Specifically, the first sub-part 121 may be disposed on the same layer as the driving circuit layer 1113, the second electrode 1111c and the first substrate 1112. In this way, the driving circuit layer 1113 can be continuous and the second electrode 1111c can be disposed on the entire surface, so as to drive the light-emitting functional part 1111b to emit light and improve the display uniformity of the stretchable display panel.

[0098] In some embodiments, the first sub-part 121 includes a resilient substrate.

[0099] This allows the first sub-part 121 to have better tensile properties, thereby improving the tensile properties of the stretchable display panel 10.

[0100] It should be noted that, for reference Figures 2 to 3The elastic substrate can be disposed on the same layer as the first substrate 1112. (See reference...) Figures 5 to 6 A first substrate 1112 and an elastic substrate can be fabricated on a second substrate 21 having a laser release layer 22. Specifically, the laser release layer 22 is disposed on one side surface of the second substrate 21, and the first substrate 1112 and the elastic substrate are formed on the side of the laser release layer 22 away from the second substrate 21. After fabrication, the second substrate 21 is irradiated with a laser to reduce the adhesion between the laser release layer 22 and the first substrate 1112 and the elastic substrate, so that the first substrate 1112 and the elastic substrate are peeled off from the second substrate 21, and the peeled laser release layer 22 is located on the second substrate 21. The second substrate 21 can be a glass substrate. After laser peeling, a second sub-part 122 and a first protective part 113 (mentioned below) can be formed on the first substrate 1112 and the elastic substrate. The first protective part 113 can be bonded to the first substrate 1112 by the adhesive layer 13 (mentioned below), and the two first protective parts 113 adjacent to the second sub-part 122 are also considered.

[0101] In some embodiments, the elastic substrate includes a flexible substrate in which an elastomeric material is doped.

[0102] This allows the first sub-part 121 to have better tensile properties, thereby improving the tensile properties of the stretchable display panel 10.

[0103] See Figure 4 In some embodiments, the doping concentration of the elastomeric material in the flexible substrate decreases along a direction parallel to the plane where the display island 11 is located, away from the central region of the first sub-part 121.

[0104] Therefore, by adjusting the doping concentration of the elastomeric material in the flexible substrate, the stretching ratio of the first sub-part 121 can be easily controlled. This allows the stretching ratio of the first sub-part 121 to decrease along the direction parallel to the plane where the display island 11 is located, away from the center region of the first sub-part 121. This reduces the probability of the first sub-part 121 breaking near the pixel island 111, improves the reliability of the connection between the first sub-part 121 and the pixel island 111 when the stretchable display panel 10 is stretched, ensures the normal operation of the stretchable display panel 10, and improves the display effect and display stability of the stretchable display panel 10.

[0105] In one specific example, the flexible substrate of the first sub-part 121 is made of at least one of polyacrylate and polyethylene terephthalate.

[0106] In one specific example, the doping concentration of the elastomeric material is 7% to 28%. For example, along a direction parallel to the plane where the display island 11 is located, and away from the central region of the first sub-section 121, the doping concentration of the elastomeric material in the flexible substrate gradually decreases from 28% to 7%. The elastomeric material may be styrene.

[0107] In some embodiments, the maximum elongation of the first sub-part is less than 30%.

[0108] See Figure 1 In some embodiments, the signal line 12a is arc-shaped.

[0109] This allows the signal line 12a to have a certain degree of stretchability, enabling it to undergo tensile deformation under tension, adapting to the stretched state of the stretchable display panel 10. This reduces the likelihood of the signal line 12a breaking, ensuring the normal operation of the stretchable display panel 10 and improving its display effect and stability.

[0110] In some embodiments, there may be multiple signal lines 12a, with at least one signal line 12a being disposed on the same layer as the traces in the driving circuit layer 1113, and at least one signal line 12a being disposed on the same layer as the second electrode 1111c.

[0111] See Figure 2 and Figure 3 In some embodiments, the display island 11 further includes an encapsulation unit 112, which covers the top and side surfaces of the pixel island 111, and two adjacent encapsulation units 112 are connected by a third sub-unit 123.

[0112] In this way, the stress on the encapsulation unit 112 when the stretchable display panel 10 is stretched can be reduced, thereby reducing the probability of the encapsulation unit 112 breaking and improving the encapsulation reliability of the encapsulation unit 112, thereby improving the display effect and reliability of the stretchable display panel 10.

[0113] It is understood that the top surface of pixel unit 1111 refers to the surface of pixel unit 1111 near the light-emitting surface 11a of display island 11, and the side surface of pixel unit 1111 refers to the surface other than the surface of pixel unit 1111 near the light-emitting surface 11a of display island 11 and the surface of pixel unit 1111 near the backlight surface 11b of display island 11.

[0114] In some embodiments, the encapsulation unit 112 includes a thin-film encapsulation layer. In one specific example, the thin-film encapsulation layer may include an inorganic encapsulation layer and an organic encapsulation layer stacked together.

[0115] In some embodiments, the third sub-part 123 includes a resilient encapsulation layer.

[0116] This allows the third sub-part 123 to have better tensile properties, thereby improving the tensile properties of the stretchable display panel 10.

[0117] In some embodiments, the resilient encapsulation layer comprises an elastomeric material.

[0118] Therefore, the elastic encapsulation layer can have better encapsulation and stretching properties, which in turn can make the third sub-part 123 have better encapsulation and stretching properties, thereby improving the encapsulation reliability of the stretchable display panel 10 and improving the stretching properties of the stretchable display panel 10.

[0119] In some embodiments, the doping concentration of the elastomeric material in the elastic encapsulation layer decreases along a direction parallel to the plane where the display island 11 is located, away from the central region of the third sub-section 123.

[0120] Therefore, by adjusting the doping concentration of the elastomeric material in the elastic encapsulation layer, the stretching ratio of the third sub-part 123 can be easily controlled. This allows the stretching ratio of the third sub-part 123 to decrease along the direction parallel to the plane where the display island 11 is located, away from the center region of the third sub-part 123. This reduces the probability of breakage at the connection between the third sub-part 123 and the encapsulation unit 112, thereby improving the encapsulation reliability of the stretchable display panel 10.

[0121] See Figure 2 and Figure 3 In some embodiments, the encapsulation unit 112 further includes a first sub-encapsulation portion 1121, which covers the top and side surfaces of the pixel unit 1111, and a third sub-part 123 includes a first stretch encapsulation portion 1231; the first stretch encapsulation portion 1231 connects two adjacent first sub-encapsulation portions 1121.

[0122] Therefore, on the one hand, the first sub-encapsulation part 1121 covers the top and side surfaces of the pixel unit 1111, which can form a good encapsulation of the pixel unit 1111, reducing the probability of water and oxygen erosion of the pixel unit 1111, thereby improving the display effect of the stretchable display panel 10; on the other hand, the first sub-encapsulation part 1121 can independently encapsulate the pixel unit 1111 of the pixel island 111, and the first stretching encapsulation part 1231 connects two adjacent first sub-encapsulation parts 1121. In this way, the probability of the first sub-encapsulation part 1121 breaking during the stretching process can be reduced, thereby improving the encapsulation reliability of the stretchable display panel 10, and also improving the stretching performance of the stretchable display panel 10.

[0123] In some embodiments, the stretching ratio of the first stretching encapsulation portion 1231 is less than the stretching ratio of the first sub-portion 121 along the thickness direction parallel to the display island portion 11.

[0124] In this way, the tensile strength of the first sub-part 121 is better than that of the first stretching encapsulation part 1231, and the allowable stretching amount of the first sub-part 121 is greater than that of the first stretching encapsulation part 1231. This makes it less likely that the stretching part 12 will break at the first sub-part 121 when the stretchable display panel is stretched in the working state, thereby reducing the probability of signal line breakage in the first sub-part 121 and improving the display effect and display stability of the stretchable display panel 10.

[0125] See Figure 4 In some embodiments, the stretching ratio of the first stretching encapsulation portion 1231 decreases along a direction parallel to the plane where the display island portion 11 is located, away from the central region of the first stretching encapsulation portion 1231.

[0126] In this way, the stretching ratio of the first stretching encapsulation portion 1231 near the first sub-encapsulation portion 1121 is minimized, while the stretching ratio of the first stretching encapsulation portion 1231 away from the first sub-encapsulation portion 1121 is maximized. This ensures that the connection area between the first stretching encapsulation portion 1231 and the first sub-encapsulation portion 1121 is less prone to breakage, reduces the stress on the first sub-encapsulation portion 1121 when the stretchable display panel 10 is stretched, thereby reducing the probability of breakage of the first sub-encapsulation portion 1121 and improving the encapsulation reliability of the first sub-encapsulation portion 1121 and the first stretching encapsulation portion 1231, thus improving the display effect and reliability of the stretchable display panel 10.

[0127] In some embodiments, the first stretch encapsulation portion 1231 includes an elastomeric material.

[0128] Therefore, the first stretchable encapsulation part 1231 can have better encapsulation and stretching performance, thereby improving the encapsulation reliability of the stretchable display panel 10 and the stretching performance of the stretchable display panel 10.

[0129] In some embodiments, the doping concentration of the elastomeric material in the first stretching encapsulation portion 1231 decreases along a direction parallel to the plane of the display island portion 11 and away from the central region of the first stretching encapsulation portion 1231.

[0130] Therefore, by adjusting the doping concentration of the elastomeric material within the first stretching encapsulation portion 1231, the stretching rate of the first stretching encapsulation portion 1231 can be easily controlled. This allows the stretching rate of the first stretching encapsulation portion 1231 to decrease along the direction parallel to the plane where the display island portion 11 is located, away from the center region of the first stretching encapsulation portion 1231. This ensures that the connection area between the first stretching encapsulation portion 1231 and the first sub-encapsulation portion 1121 is less prone to breakage, reduces the stress on the first sub-encapsulation portion 1121 when the stretchable display panel 10 is stretched, thereby reducing the probability of breakage of the first sub-encapsulation portion 1121, improving the encapsulation reliability of the stretchable display panel 10, and thus improving the display effect and reliability of the stretchable display panel 10.

[0131] In some embodiments, the doping concentration of the elastomeric material within the first stretching encapsulation portion 1231 is 6% to 24%.

[0132] In a specific example, along a direction parallel to the plane where the display island 11 is located, and away from the center region of the first stretching encapsulation portion 1231, the doping concentration of the elastomeric material within the first stretching encapsulation portion 1231 gradually decreases from 24% to 6%. The elastomeric material may be styrene.

[0133] In some embodiments, the maximum stretch ratio of the first stretch package portion 1231 is less than the maximum stretch ratio of the first sub-portion 121. In one specific example, the maximum stretch ratio of the first stretch package portion 1231 is less than 25%.

[0134] See Figure 2 and Figure 3 In some embodiments, the packaging unit 112 further includes a second sub-packaging portion 1122, which is located on the side of the first sub-packaging portion 1121 away from the pixel island 111; the third sub-portion 123 includes a second stretch packaging portion 1232, which connects two adjacent second sub-packaging portions 1122.

[0135] Therefore, by positioning the second sub-encapsulation portion 1122 on the side of the first sub-encapsulation portion 1121 away from the pixel island 111, and connecting two adjacent second sub-encapsulation portions 1122, the encapsulation reliability of the stretchable display panel 10 can be further improved, and the stretching performance of the stretchable display panel 10 can be further improved.

[0136] In some embodiments, the stretching ratio of the second stretching encapsulation portion 1232 is less than the stretching ratio of the first stretching encapsulation portion 1231 along the thickness direction parallel to the display island portion 11.

[0137] In this way, the tensile strength of the first stretchable encapsulation part 1231 and the tensile strength of the second stretchable encapsulation part 1232 can be improved, thereby reducing the probability of the first stretchable encapsulation part 1231 breaking during the stretching process, improving the encapsulation reliability of the first stretchable encapsulation part 1231, and further improving the encapsulation reliability of the stretchable display panel 10, thereby improving the display effect and reliability of the stretchable display panel 10.

[0138] See Figure 4 In some embodiments, the stretching ratio of the second stretching package 1232 decreases along a direction parallel to the plane where the display island portion 11 is located, away from the central region of the second stretching package portion 1232.

[0139] In this way, the connection area between the second stretchable encapsulation part 1232 and the second sub-encapsulation part 1122 is less likely to break, and the stress on the second sub-encapsulation part 1122 when the stretchable display panel 10 is stretched can be reduced, thereby reducing the probability of the second sub-encapsulation part 1122 breaking, improving the encapsulation reliability of the second sub-encapsulation part 1122 and the second stretchable encapsulation part 1232, and thus improving the display effect and reliability of the stretchable display panel 10.

[0140] See Figure 2 and Figure 3 In some embodiments, the orthographic projection of the second stretching encapsulation portion 1232 onto the orthographic projection of the first stretching encapsulation portion 1231 overlaps with the orthographic projection of the second sub-portion 122 onto the first stretching encapsulation portion 1231.

[0141] In some embodiments, the stretching rate of the second stretching encapsulation portion 1232 is the same as the stretching rate of the second sub-portion 122 along a direction parallel to the plane where the display island portion 11 is located.

[0142] In this way, the maximum stretching ratio of the second stretching encapsulation portion 1232 is the same as that of the second sub-portion 122, thereby ensuring that the second stretching encapsulation portion 1232 and the second sub-portion 122 are subjected to uniform force when the first sub-portion 121 and the first stretching encapsulation portion 1231 are stretched. This reduces the probability of signal lines breaking in the first sub-portion 121 and improves the display effect and display stability of the stretchable display panel 10.

[0143] In some embodiments, the second stretch encapsulation portion 1232 comprises an elastomeric material.

[0144] Therefore, the second stretchable encapsulation part 1232 can have better encapsulation and stretching performance, thereby improving the encapsulation reliability of the stretchable display panel 10 and the stretching performance of the stretchable display panel 10.

[0145] In some embodiments, along a direction parallel to the plane where the display island portion 11 is located, the doping concentration of the elastomeric material within the second stretching package portion 1232 decreases away from the central region of the second stretching package portion 1232.

[0146] Therefore, by adjusting the doping concentration of the elastomeric material within the second stretching encapsulation portion 1232, the stretching rate of the second stretching encapsulation portion 1232 can be easily controlled. This allows the stretching rate of the second stretching encapsulation portion 1232 to decrease along the direction parallel to the plane where the display island portion 11 is located, away from the center region of the second stretching encapsulation portion 1232. This ensures that the connection area between the second stretching encapsulation portion 1232 and the second sub-encapsulation portion 1122 is less prone to breakage, reduces the stress on the second sub-encapsulation portion 1122 when the stretchable display panel 10 is stretched, thereby reducing the probability of breakage of the second sub-encapsulation portion 1122, improving the encapsulation reliability of the stretchable display panel 10, and thus improving the display effect and reliability of the stretchable display panel 10.

[0147] In some embodiments, the doping concentration of the elastomeric material within the second stretching encapsulation portion 1232 is 5% to 20%. In a specific example, along a direction parallel to the plane where the display island portion 11 is located, and away from the center region of the second stretching encapsulation portion 1232, the doping concentration of the elastomeric material within the second stretching encapsulation portion 1232 gradually decreases from 20% to 5%. The elastomeric material may be styrene.

[0148] In some embodiments, the maximum stretch ratio of the second stretch package 1232 may be equal to the maximum stretch ratio of the second sub-package 122. In one specific example, the maximum stretch ratio of the second stretch package 1232 is less than 20%.

[0149] See Figure 2 and Figure 3 In some embodiments, the display island portion 11 further includes a first protection portion 113, which is located on the side of the pixel island 111 near the backlight surface 11b of the display island portion 11, and two adjacent first protection portions 113 are connected by a second sub-portion 122.

[0150] Therefore, the first protection part 113 can play a protective and buffering role for the pixel island 111, thereby improving the reliability of the stretchable display panel 10.

[0151] See Figure 2 and Figure 3 In some embodiments, the first protective part 113 and the second sub-part 122 are disposed on the same layer.

[0152] In some embodiments, the second sub-part 122 includes an elastic protective portion. In one specific example, the elastic protective portion includes an elastomeric material;

[0153] Therefore, the second sub-part 122 can provide protection for the stretchable display panel 10, and at the same time, the second sub-part 122 has better tensile properties, thereby improving the reliability of the stretchable display panel 10 and improving its tensile properties.

[0154] In a specific example, along a direction parallel to the plane where the display island 11 is located, the doping concentration of the elastomeric material in the elastic protection section decreases away from the central region of the second sub-section 122.

[0155] Therefore, by adjusting the doping concentration of the elastomeric material in the elastic protection section, the stretching rate of the second sub-section 122 can be easily controlled. This allows the stretching rate of the second sub-section 122 to decrease along the direction parallel to the plane where the display island section 11 is located, away from the center region of the second sub-section 122. In this way, it can be ensured that the connection area between the second sub-section 122 and the first protection section 113 is not prone to breakage, thereby improving the display effect and display stability of the stretchable display panel 10.

[0156] In some embodiments, the doping concentration of the elastomeric material in the elastic protection section is 5% to 20%. In a specific example, along a direction parallel to the plane where the display island 11 is located, and along the central region away from the second sub-section 122, the doping concentration of the elastomeric material in the elastic protection section gradually decreases from 20% to 5%. The elastomeric material may be styrene.

[0157] In some embodiments, the maximum elongation of the second sub-part 122 is less than 20%.

[0158] See Figure 2 and Figure 3 In some embodiments, an adhesive layer 13 is also included, which is disposed between the first protective portion 113 and the pixel island 111. In one specific example, the adhesive layer 13 includes optical adhesive.

[0159] In this way, the first protective part 113 and the pixel island 111 can be easily bonded together, improving the bonding reliability between the first protective part 113 and the pixel island 111.

[0160] In one embodiment, both the first protective part 114 and the second protective part may include cushioning foam.

[0161] According to another aspect of this application, a stretchable display device is provided, including the stretchable display panel 10 in any of the above embodiments. This improves the display effect and stability of the stretchable display device.

[0162] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0163] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A stretchable display panel, characterized in that, include: Multiple display islands are provided, and the multiple display islands are spaced apart; as well as Multiple stretching sections are provided, each stretching section connecting two adjacent display island sections; each stretching section includes at least a first sub-section, the first sub-section connecting two adjacent display island sections, and the first sub-section having a signal line electrically connected to the display island section. Specifically, the stretching ratio of the stretching portion decreases along the direction away from the central region of the first sub-part; The stretching portion further includes a second sub-portion, which is located on the side of the first sub-portion near the backlight surface of the display island portion. The second sub-portion connects two adjacent display island portions, and the stretching ratio of the second sub-portion is less than that of the first sub-portion.

2. The stretchable display panel according to claim 1, characterized in that, Along the thickness direction parallel to the display island portion, the stretching ratio of the stretching portion decreases as it moves away from the center region of the first sub-part.

3. The stretchable display panel according to claim 1, characterized in that, The stretching section further includes a third sub-section, which is located on the side of the first sub-section near the light-emitting surface of the display island section, and the third sub-section connects two adjacent display island sections; the stretching ratio of the third sub-section is less than that of the first sub-section.

4. The stretchable display panel according to claim 3, characterized in that, The stretching ratio of the third sub-part is greater than or equal to the stretching ratio of the second sub-part.

5. The stretchable display panel according to claim 1, characterized in that, Along a direction parallel to the plane where the display island is located, and away from the center region of the first sub-part, the stretching ratio of the stretching part decreases.

6. The stretchable display panel according to claim 1, characterized in that, Along a direction parallel to the plane where the display island is located, and away from the center region of the first sub-part, the elongation of the first sub-part decreases.

7. The stretchable display panel according to claim 1, characterized in that, The second sub-part is located on the side of the first sub-part closer to the backlight surface of the display island, and the second sub-part connects two adjacent display islands; along a direction parallel to the plane where the display islands are located, the stretching ratio of the second sub-part decreases away from the center region of the second sub-part.

8. The stretchable display panel according to claim 1, characterized in that, The stretching section further includes a third sub-section, which is located on the side of the first sub-section near the light-emitting surface of the display island section. The third sub-section connects two adjacent display island sections. Along a direction parallel to the plane where the display island section is located, and away from the central region of the third sub-section, the stretching ratio of the third sub-section decreases.

9. The stretchable display panel according to claim 3 or 8, characterized in that, The display island includes pixel islands, and the pixel islands of two adjacent display islands are connected by the first sub-section.

10. The stretchable display panel according to claim 9, characterized in that, The first sub-part is disposed on the same layer as at least a portion of the pixel island.

11. The stretchable display panel according to claim 9, characterized in that, The pixel island includes at least one pixel unit, and the signal line is electrically connected to the pixel unit.

12. The stretchable display panel according to claim 11, characterized in that, The signal line is arc-shaped.

13. The stretchable display panel according to claim 1, characterized in that, The first sub-part includes an elastic substrate.

14. The stretchable display panel according to claim 13, characterized in that, The elastic substrate includes a flexible substrate, wherein the flexible substrate is doped with an elastomeric material.

15. The stretchable display panel according to claim 14, characterized in that, Along a direction parallel to the plane where the display island is located, and away from the center region of the first sub-part, the doping concentration of the elastomeric material in the flexible substrate decreases.

16. The stretchable display panel according to claim 14, characterized in that, The doping concentration of the elastomer material is 7% to 28%.

17. The stretchable display panel according to claim 1, characterized in that, The maximum elongation of the first sub-part is less than 30%.

18. The stretchable display panel according to claim 9, characterized in that, The display island also includes a packaging unit that covers the top and side surfaces of the pixel island, and two adjacent packaging units are connected by the third sub-part.

19. The stretchable display panel according to claim 18, characterized in that, The packaging unit includes a thin-film packaging layer.

20. The stretchable display panel according to claim 18, characterized in that, The third sub-part includes a flexible encapsulation layer.

21. The stretchable display panel according to claim 20, characterized in that, The elastic encapsulation layer comprises an elastomeric material.

22. The stretchable display panel according to claim 21, characterized in that, Along a direction parallel to the plane where the display island is located, and away from the center region of the third sub-part, the doping concentration of the elastomeric material in the elastic encapsulation layer decreases.

23. The stretchable display panel according to claim 18, characterized in that, The packaging unit includes a first sub-packaging section that covers the top and side surfaces of the pixel island; the third sub-section includes a first stretch packaging section that connects two adjacent first sub-packaging sections.

24. The stretchable display panel according to claim 23, characterized in that, Along the thickness direction parallel to the display island portion, the stretching ratio of the first stretching encapsulation portion is less than the stretching ratio of the first sub-portion.

25. The stretchable display panel according to claim 23, characterized in that, Along a direction parallel to the plane where the display island is located, the stretching ratio of the first stretch package decreases as it moves away from the center region of the first stretch package.

26. The stretchable display panel according to claim 23, characterized in that, The first stretching encapsulation portion includes an elastomeric material.

27. The stretchable display panel according to claim 26, characterized in that, Along a direction parallel to the plane where the display island is located, and away from the center region of the first stretch package, the doping concentration of the elastomeric material in the first stretch package decreases.

28. The stretchable display panel according to claim 26, characterized in that, The doping concentration of the elastomeric material in the first stretching encapsulation section is 6% to 24%.

29. The stretchable display panel according to claim 23, characterized in that, The maximum stretch ratio of the first stretchable encapsulation portion is less than 25%.

30. The stretchable display panel according to claim 23, characterized in that, The packaging unit further includes a second sub-packaging section, which is located on the side of the first sub-packaging section away from the pixel island; the third sub-section includes a second stretch packaging section, which connects two adjacent second sub-packaging sections.

31. The stretchable display panel according to claim 30, characterized in that, Along the thickness direction parallel to the display island portion, the stretching ratio of the second stretching package portion is less than that of the first stretching package portion.

32. The stretchable display panel according to claim 30, characterized in that, Along a direction parallel to the plane where the display island is located, the stretching ratio of the second stretch package decreases as it moves away from the center region of the second stretch package.

33. The stretchable display panel according to claim 30, characterized in that, The projection of the second stretching package portion onto the first stretching package portion overlaps with the projection of the second sub-part onto the first stretching package portion.

34. The stretchable display panel according to claim 30, characterized in that, Along a direction parallel to the plane where the display island is located, the stretching rate of the second stretching encapsulation portion is the same as the stretching rate of the second sub-portion.

35. The stretchable display panel according to claim 30, characterized in that, The second stretch encapsulation portion includes an elastomeric material.

36. The stretchable display panel according to claim 35, characterized in that, Along a direction parallel to the plane where the display island is located, and away from the center region of the second stretching package, the doping concentration of the elastomeric material in the second stretching package decreases.

37. The stretchable display panel according to claim 35, characterized in that, The doping concentration of the elastomeric material in the second stretching encapsulation section is 5% to 20%.

38. The stretchable display panel according to claim 30, characterized in that, The maximum stretch ratio of the second stretchable encapsulation portion is less than 20%.

39. The stretchable display panel according to claim 9, characterized in that, The display island also includes a first protective part, which is located on the side of the pixel island near the backlight surface of the display island, and two adjacent first protective parts are connected by a second sub-part.

40. The stretchable display panel according to claim 39, characterized in that, The first protective section and the second subsection are arranged on the same layer.

41. The stretchable display panel according to claim 39, characterized in that, The second sub-section includes an elastic protection section.

42. The stretchable display panel according to claim 41, characterized in that, The elastic protective part includes an elastomeric material.

43. The stretchable display panel according to claim 42, characterized in that, Along a direction parallel to the plane where the display island is located, and away from the center region of the second sub-section, the doping concentration of the elastomeric material in the elastic protection section decreases.

44. The stretchable display panel according to claim 42, characterized in that, The doping concentration of the elastomeric material in the elastic protective part is 5% to 20%.

45. The stretchable display panel according to claim 1, characterized in that, The maximum elongation of the second sub-section is less than 20%.

46. ​​The stretchable display panel according to claim 39, characterized in that, It also includes an adhesive layer disposed between the first protective portion and the pixel island.

47. The stretchable display panel according to claim 46, characterized in that, The adhesive layer includes optical adhesive.

48. A stretchable display device, characterized in that, Includes the stretchable display panel as described in any one of claims 1 to 47.

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