WO2020206971A1

WO2020206971A1 - Stretchable display panel and fabricating method therefor, and display device

Info

Publication number: WO2020206971A1
Application number: PCT/CN2019/111748
Authority: WO
Inventors: 王涛; 贾松霖; 李旭娜; 李亚龙; 翟峰
Original assignee: 云谷（固安）科技有限公司
Priority date: 2019-04-12
Filing date: 2019-10-17
Publication date: 2020-10-15
Also published as: CN111816675A; CN111816675B

Abstract

Disclosed are a stretchable display panel and a fabricating method therefor, and a display device. The stretchable display panel comprises: a polyimide substrate comprising several first sub-polyimide substrates, several second sub-polyimide substrates, and at least one third sub-polyimide substrate; a first conducting wire located above the first sub-polyimide substrate and the second sub-polyimide substrate; and at least one first device, wherein the first device is located on the first sub-polyimide substrate; the first conducting wire is electrically connected to the first device; the first devices are electrically connected to each other by means of the first conducting wire; adjacent first sub-polyimide substrates are connected to each other by means of the second sub-polyimide substrates to form a closed area in which the third sub-polyimide substrate is located; the first sub-polyimide substrate, the second sub-polyimide substrate, the first device, and the first conducting wire constitute a first device group.

Description

Stretchable display panel, preparation method thereof and display device

Related application

This application claims the priority of the Chinese patent application filed on April 12, 2019, with application number 201910295496.2, titled "Stretchable Display Panel and its Preparation Method, and Display Device", which is hereby incorporated by reference in its entirety.

Technical field

This application relates to the field of display technology, and in particular to a stretchable display panel, a preparation method thereof, and a stretchable display device.

Background technique

At present, there are two ways to realize the stretching of the device, one is to realize the stretching function through the electrode material that can be stretched by itself, such as the composite material of polydimethylsiloxane and graphene or nano silver wire; the other is By patterning non-stretchable metal materials.

The stretching ability of the first scheme is strong enough, but the electrical performance cannot meet the application of high-precision instruments. The second scheme also has problems with the device structure that realizes the stretching ability through patterning. Because the patterned electrode circuit requires space, Therefore, the degree of integration cannot be improved, and polyimide is used as the substrate of the metal wire to achieve tensile properties through the patterning of polyimide, but the patterning of polyimide can be achieved by laser laser or exposure and development. There are few types of polyimide for exposure and development, and the production thickness is thin, and it cannot support high-temperature processes, or there are difficulties in laser stripping, so laser lasers are used.

The working method of laser laser is to use laser to remove all polyimide in non-wire area, but it has the defects of long processing time and shortened laser life.

Summary of the invention

This application mainly provides a stretchable display panel, a preparation method thereof, and a stretchable display device. It overcomes the defects of long processing time and shortened laser life in the laser laser method.

In the first aspect, an embodiment of the present application provides a stretchable display panel, and the stretchable display panel includes:

A polyimide substrate, the polyimide substrate includes a plurality of first sub polyimide substrates, a plurality of second sub polyimide substrates, and at least one third sub polyimide substrate;

A first wire, the first wire is located on the first sub-polyimide substrate and the second sub-polyimide substrate;

At least one first device, the first device is located on the first sub-polyimide substrate, the first wire is electrically connected to the first device, and the first devices are electrically connected through the first wire;

Adjacent first sub-polyimide substrates are connected by second sub-polyimide substrates to form a closed area, and the third sub-polyimide substrate is located in the closed area; the first sub-polyimide substrate The substrate, the second sub-polyimide substrate, the first device and the first wire constitute a first device group.

In the second aspect, an embodiment of the present application provides a stretchable display device, which includes a stretchable display panel;

The stretchable display panel includes:

A first wire, the first wire being located on the first sub-polyimide substrate and the second sub-polyimide substrate;

At least one first device, the first device is located on the first sub-polyimide substrate, the first wire is electrically connected to the first device, and the first device passes through the The first wire is electrically connected;

The adjacent first sub-polyimide substrates are connected by the second sub-polyimide substrates to form a closed area, and the third sub-polyimide substrate is located in the closed area ；

The first sub-polyimide substrate, the second sub-polyimide substrate, the first device, and the first wire form a first device group.

In a third aspect, the present application also provides a method for manufacturing a stretchable display panel, including:

Coating a peelable substrate on the substrate;

Coating a photoresist layer, and patterning the photoresist layer;

Depositing a metal layer, and patterning the metal layer;

Patterning the peelable substrate;

Forming a device; and

Form an elastomer.

The present application provides a stretchable display panel, a preparation method thereof, and a stretchable display device,

By retaining the polyimide substrate pattern in the central area between the devices, the stretchable display panel of the present application can shorten the processing time of the laser laser, prolong the service life of the laser, and increase the productivity. A new set of device groups are formed on the reserved polyimide substrate pattern, which solves the problem of the inability to fabricate high-density devices due to the large space required for wire and substrate patterning in order to achieve the stretching function. This method can effectively improve the precision of the device, and its application in the display can significantly improve the PPI. The new device group formed on the reserved polyimide substrate pattern can be located on the upper and lower sides opposite to the original device group, forming a double-sided display body, and at the same time, it can increase the rigidity of the device substrate, which is equivalent to A layer of polyimide substrate is added on one side of the original integrated device, which is beneficial to protect the device and is not easy to damage.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. among them:

FIG. 1 is a schematic structural diagram of an embodiment of a stretchable display panel provided by the present application;

2 is a schematic diagram of a cross-sectional structure of an embodiment of a stretchable display panel provided by the present application;

FIG. 3 is a schematic structural view of adding a second wire, a second device, and a fifth sub-polyimide substrate according to the display panel shown in FIG. 1;

FIG. 4 is a cross-sectional structure of adding a first intermediate layer, an elastomer, a fourth sub-polyimide substrate, a second wire, a second device, and a fifth sub-polyimide substrate according to the display panel shown in FIG. 2 Schematic diagram

FIG. 5 is a schematic diagram showing the structure of the first device group and the second device group being reversely arranged according to the display panel shown in FIG. 4, and a second intermediate layer and a sixth sub-polyimide substrate are added, and the first intermediate layer is omitted ；

6 is a schematic cross-sectional structure diagram of adding an elastic body according to the display panel shown in FIG. 5;

FIG. 7 is a schematic flowchart of a method for preparing a stretchable display panel provided by the present application.

detailed description

The features and exemplary embodiments of each aspect of the present application will be described in detail below. In order to make the purpose, technical solutions, and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only configured to explain the present application, and not configured to limit the present application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

The "stretchable" mentioned in this article means that it can be stretched under tension, but it does not exclude being shortened under pressure, that is, the deformation that can occur under the action of external force is within the meaning of "stretchable". Hereinafter, the application will be described in detail with reference to the drawings.

Please refer to Figures 1 and 2, an embodiment of the present application provides a stretchable display panel including a plurality of first sub-polyimide substrates 11, first wires 21, first devices 31, and a plurality of second sub-polyimide substrates. The imine substrate 12 and at least one third sub-polyimide substrate 13. The first device 31 may specifically be an optoelectronic device or a sensor device constituting a display panel, which is not specifically limited here.

The first sub-polyimide substrate 11 and the second sub-polyimide substrate 12 are connected to form a closed area. The third sub-polyimide substrate 13 is an independent polyimide substrate, and the third sub-polyimide substrate 13 is located in the closed area. A first wire 21 and a first device 31 are provided on the upper surface of the first sub-polyimide substrate 11. A first wire 21 is provided on the second sub-polyimide substrate 12. The first device 31 is located above the first wire 21. The first wire 21 is electrically connected to the first device 31, and the first devices 31 are electrically connected through the first wire 21. That is, a part of the first wire 21 is located on the first sub-polyimide substrate 11, and the other part is located on the second sub-polyimide substrate 12. The size of the third polyimide substrate 13 can be adjusted according to actual conditions to ensure that the stretching performance of the device is not affected.

In one embodiment, the first sub-polyimide substrate 11 with the first device 31 thereon is an island-shaped polyimide substrate, and the second sub-polyimide substrate 12 is a bridge-shaped polyimide substrate. Imine substrate.

In an embodiment, the size of the first device 31 may be smaller than the size of the first sub-polyimide substrate 11.

The first sub-polyimide substrate 11 and the second sub-polyimide substrate 12 may be an integral structure, for example, may be formed by patterning a continuous and complete polyimide substrate. The plurality of first sub-polyimide substrates 11 and the plurality of second sub-polyimide substrates 12 may be alternately connected to form the closed area. Each first sub-polyimide substrate 11 can be located between two second sub-polyimide substrates 12 and connected to the two second sub-polyimide substrates 12 respectively. Each second sub-polyimide substrate 12 may be located between the two first sub-polyimide substrates 11 and connected to the two first sub-polyimide substrates 11 respectively.

The third sub-polyimide substrate 13 is disposed in the closed area, and may be spaced apart from the plurality of first sub-polyimide substrates 11 and the plurality of second sub-polyimide substrates 12 .

The first wire 21 can be supported by the surfaces of the first sub polyimide substrate 11 and the second sub polyimide substrate 12, and the first wire 21 is sandwiched between the first sub polyimide substrate 11 and the second sub polyimide substrate 11 Between a device 31.

In an embodiment, the two ends of the first wire 21 are respectively located on the two first sub-polyimide substrates 11, and the middle portion is located on the second sub-polyimide substrate 12. In another embodiment, the parts of the first wires 21 respectively located on the two first sub-polyimide substrates 11 are not the ends of the first wires 21, and the first wires 21 are from a second sub-polyimide substrate. The amine substrate 12 passes through a first sub-polyimide substrate 11 and then extends to another second sub-polyimide substrate 12.

The shape of the first sub-polyimide substrate 11 can be any implementable pattern, such as a rectangle, a rhombus, a triangle, a circle, a polygon, etc., and it is a square in the embodiment of FIG. 1. The square shape saves the most space and facilitates the arrangement of devices on the first sub-polyimide substrate 11. The shape of the second sub-polyimide substrate 12 may be a straight line or a curve with a certain width.

In this embodiment, there are no wires and devices on the third sub-polyimide substrate 13. The shape of the third sub-polyimide substrate 13 can be any implementable pattern, and in one embodiment is a square.

As shown in FIG. 2, the stretchable display panel further includes an elastomer 50. The elastomer 50 connects the first sub-polyimide substrate 11, the second sub-polyimide substrate 12, and the third sub-polyimide substrate. The amine substrate 13, the first wire 21, and the first device 31 are wrapped to help protect the device from being damaged when stretched. The elastic body 50 may be a continuous whole, the first sub-polyimide substrate 11, the second sub-polyimide substrate 12, the third sub-polyimide substrate 13, the first wire 21, the first device 31 is embedded inside the same elastic body 50. The elastic body 50 can be elastically deformed under a force.

The first sub-polyimide substrate 11, the second sub-polyimide substrate 12, and the third sub-polyimide substrate 13 can be formed by dividing a complete polyimide substrate, for example, by laser Pattern the complete polyimide substrate in a manner. In this embodiment, by retaining the third polyimide substrate 13 in the middle of the device, the area of polyimide patterning can be reduced without reducing the tensile performance of the device, thereby shortening the patterning area of polyimide. Time, and prolong the service life of the laser, increase the productivity.

In some embodiments, the orthographic shape of the portion of the first wire 21 located on the first polyimide sub-substrate 11 is a straight line, and the portion of the first wire 21 located on the second sub-polyimide substrate 12 is The orthographic projection shape is a straight line or a curve. In an embodiment, the orthographic shape of the portion of the first wire 21 located on the second sub-polyimide substrate 12 is a curve, for example, an S shape, and the second sub-polyimide substrate 12 is also a curve. For example, it is S-shaped, that is, the part of the first wire 21 located on the second sub-polyimide substrate 12 has the same or similar shape as the second sub-polyimide substrate 12, and the second sub-polyimide substrate The width of the amine substrate 12 is equal to or slightly larger than the width of the portion of the first wire 21 on the second sub-polyimide substrate 12. When subjected to tension, the curvilinear second sub-polyimide substrate 12 together with the first wires 21 on it can be stretched into a straight line or close to a straight line, which can make it possible to stretch the display panel to a certain extent. When stretched, the first wire 21 will not be broken due to deformation.

In some embodiments, the orthographic projection of the first wire 21 on the polyimide substrate is located in the central area of the first sub-polyimide substrate 11 and the second sub-polyimide substrate 12. The width of the first wire 21 is smaller than or equal to the width of the first sub-polyimide substrate 11 and the second sub-polyimide substrate 12, respectively. The width of the first wire 21 is the length of d marked in FIG. 1. In this way, it can be ensured that the stress on the first wire 21 is minimized during stretching, and it is not easy to break.

In some embodiments, the first sub-polyimide substrate 11, the second sub-polyimide substrate 12, the first device 31, and the first wire 21 constitute a first device group.

In some embodiments, the first sub-polyimide substrate 11, the second sub-polyimide substrate 12, and the third sub-polyimide substrate 13 are arranged in the same layer, which can further simplify the manufacturing process.

In another embodiment, referring to FIG. 3, the stretchable display panel further includes a second wire 22, a second device 32, and a fifth sub-polyimide substrate 15.

Please refer to FIG. 4, the stretchable display panel may further include a first intermediate layer 41, an elastomer 50 and a fourth sub-polyimide substrate 14. The fourth sub-polyimide substrate 14 is located on the third sub-polyimide substrate 13. The second device 32 and part of the second wire 22 are located on the fourth sub-polyimide substrate 14, and another part of the second wire 22 is located on the fifth sub-polyimide substrate 15. The first intermediate layer 41 is located between the third sub-polyimide substrate 13 and the fourth sub-polyimide substrate 14. The fourth sub-polyimide substrate 14, the fifth sub-polyimide substrate 15, the second wire 22 and the second device 32 constitute a second device group. The plurality of second device groups can be connected to each other through the second wire.

A part of the second wire 22 is provided on the upper surface of the fourth sub-polyimide substrate 14. The second device 32 is located on the fourth sub-polyimide substrate 14 and above the second wire 22. The second wire 22 is electrically connected to the second device 32, and the second device 32 is electrically connected through the second wire 22. A part of the second wire 22 is provided on the fifth sub-polyimide substrate 15. The second wire 22 provided on the upper surface of the fourth sub-polyimide substrate 14 and the second wire 22 provided on the fifth sub-polyimide substrate 15 are connected to each other. .

The second wire 22 can be supported by the surfaces of the fourth sub-polyimide substrate 14 and the fifth sub-polyimide substrate 15, and the second wire 22 is sandwiched between the fourth sub-polyimide substrate 14 and the fourth sub-polyimide substrate 14. Between two devices 32.

There may be several fifth sub-polyimide substrates 15 located at both ends of the third sub-polyimide substrate 13. In one embodiment, the middle portion of the second wire 22 is located on the third sub-polyimide substrate 13, and both ends are located on the two fifth sub-polyimide substrates 15 respectively. Optionally, the second wire 22 passes from a fifth sub-polyimide substrate 15 through a third sub-polyimide substrate 13 and then extends to another fifth sub-polyimide substrate 15. The part of the second wire 22 located on the two fifth sub-polyimide substrates 15 may not be an end part. There may be several third sub-polyimide substrates 13, and the second wire 22 extends from a third sub-polyimide substrate 13 through a fifth sub-polyimide substrate 15 to another sub-polyimide substrate. Three polyimide substrate 13.

In an embodiment, the size of the second device 32 may be smaller than the size of the third sub-polyimide substrate 13.

In one embodiment, a plurality of third sub-polyimide substrates 13 are arranged in an array, and a plurality of first sub-polyimide substrates 11 are also arranged in an array, and except for the edge of the array, each third sub-substrate The polyimide substrate 13 is surrounded by a plurality of first sub-polyimide substrates 11, and each first sub-polyimide substrate 11 is also provided with a plurality of third sub-polyimides. Substrate 13.

Since the wires of the first device group and the second device group overlap, the overlapping area is isolated by the first intermediate layer 41, which does not affect the movement of the device when it is stretched. The elastomer 50 connects the first sub-polyimide substrate 11, the second sub-polyimide substrate 12, the third sub-polyimide substrate 13, the fourth sub-polyimide substrate 14, and the fifth sub-polyimide substrate. The sub-polyimide substrate 15, the first wire 21, the second wire 22, the first device 31, the second device 32 and the first intermediate layer 41 are wrapped to help protect the device from being damaged when stretched.

The second device group is located in the gap between the first device groups. This arrangement can significantly improve the precision of the device and can significantly increase the pixel density (PPI) of the stretchable display panel.

The first intermediate layer 41 is an adhesive layer of elastic material, such as polydimethylsiloxane, because it facilitates the adhesion with polyimide without affecting the tensile properties and optical properties.

The second wire 22 is located in the central area of the third sub-polyimide substrate 13, and the width 22 of the second wire is less than or equal to the width of the third sub-polyimide substrate 13. The definition of the width is as shown in the previous embodiment, and will not be detailed here. In this way, it can be ensured that when the second wire 22 is stretched, the stress on the second wire 22 is minimized and it is not easy to break.

The orthographic shape of the portion of the second wire 22 located on the fourth sub-polyimide substrate 14 is a straight line.

The orthographic projection of the portion of the second wire 22 on the fifth sub-polyimide substrate 15 is a straight line or a curved line. When the orthographic projection is a curve, the tensile stress can be further buffered. The fifth sub-polyimide substrate 15 may also be curved, and the portion of the second wire 22 on the fifth sub-polyimide substrate 15 has the same or similar shape as the fifth sub-polyimide substrate 15 The width of the fifth sub-polyimide substrate 15 is equal to or slightly larger than the width of the portion of the second wire 22 on the fifth sub-polyimide substrate 15. When under tension, the curvilinear fifth sub-polyimide substrate 15 together with the second wires 22 on it can be stretched into a straight line or close to a straight line, to a certain extent, when the display panel is stretched , The second wire 22 will not be broken due to deformation.

In some embodiments, the first sub-polyimide substrate 11, the second sub-polyimide substrate 12, and the third sub-polyimide substrate 13 are arranged in the same layer, and the fourth sub-polyimide substrate The bottom 14 and the fifth sub-polyimide substrate 15 are arranged in the same layer, which can optimize the manufacturing process.

In an embodiment, the fourth sub-polyimide substrate 14 and the fifth sub-polyimide substrate 15 can be formed by dividing another complete polyimide substrate, for example, by laser patterning. The complete polyimide substrate.

In another embodiment, please refer to FIG. 5 and FIG. 6, the stretchable display panel provided by the present application further includes a second intermediate layer 42 and a sixth sub-polyimide substrate 16.

In this embodiment, the island-shaped polyimide substrate in the middle of FIG. 5 is the third sub-polyimide substrate 13, and the bridge-shaped polyimide substrate connected to it is the fifth sub-polyimide substrate. Sub-polyimide substrate 15.

In this embodiment, the second intermediate layer 42 is located between the third sub-polyimide substrate 13 and the fourth sub-polyimide substrate 14, and is also located between the first sub-polyimide substrate 11 and the fourth sub-polyimide substrate. Between six polyimide substrates 16.

In this embodiment, the orthographic projection shape of the portion of the second wire 22 on the fifth sub-polyimide substrate 15 is a straight line or a curve, preferably a curve, and more specifically, an S shape, which can further prevent stretching Fracture in the process.

In this embodiment, the device orientations of the first device group and the second device group are opposite, and there is a second intermediate layer 42 between the first device group and the second device group, the first device group and the second device group The devices are located on the upper and lower sides of the second intermediate layer 42. This arrangement can form a double-sided display that can stretch the display panel.

In this embodiment, the elastic body 50 combines the first sub-polyimide substrate 11, the second sub-polyimide substrate 12, the third sub-polyimide substrate 13, and the fourth sub-polyimide substrate. Substrate 14, fifth sub polyimide substrate 15, sixth sub polyimide substrate 16, first wire 21, second wire 22, first device 31, second device 32, and second intermediate layer All 42 are wrapped. The elastic body 50 has an all-round protection for the first device 31 and the second device 32, and the elastic body 50 between the two devices plays a role of connection and support.

In some embodiments, the second intermediate layer 42 is an adhesive layer of elastic material, preferably polydimethylsiloxane, because it facilitates the adhesion with polyimide without affecting the stretchability. And optical performance.

In some embodiments, the thickness of the first intermediate layer 41 and the second intermediate layer 42 are both less than 10 μm, which is less than the thickness of the elastomer 50, which is beneficial to making the stretchable display panel thin.

In some embodiments, the material of the elastomer 50 includes one or more of silicone rubber, polyurethane, and acrylic, preferably silicone rubber, because silicone rubber facilitates film formation.

In some embodiments, the first sub-polyimide substrate 11 and the third sub-polyimide substrate 13 are arranged in the same layer, and the fourth sub-polyimide substrate 14 and the sixth sub-polyimide substrate are arranged in the same layer. The bottom 16 is set in the same layer to optimize the production process.

The embodiments of the present application also provide a stretchable display device, which can be an OLED display device, a Micro LED display device, an LED display device, and a sensor device, as well as a TV, a digital camera, an OLED display device, a Micro LED, and an LED display device. Any product or component with display function such as mobile phone, tablet computer, smart watch, e-book, navigator, etc.

The display device includes: the stretchable display panel in any one of the foregoing embodiments, and the structure, function, and implementation of the stretchable display panel can be referred to the specific description in the foregoing embodiment, and will not be repeated here.

FIG. 7 is a schematic flow chart of a method for preparing a stretchable display panel according to an exemplary embodiment of the present application. As shown in FIG. 7, the method for preparing a stretchable display panel provided in this embodiment includes steps 101 to 107 .

Step 101: Provide a substrate.

Specifically, the substrate may be a glass substrate.

Step 102: Coating a peelable substrate.

Specifically, the peelable substrate is preferably a polyimide substrate, and the thickness of the polyimide substrate is 5-30 μm.

Step 103: coating the photoresist layer, and performing patterning processing on the photoresist layer.

A photoresist layer is coated on the peelable substrate, and the photoresist layer is patterned through an exposure and development process.

Step 104: deposit a metal layer, and perform patterning processing on the metal layer.

A metal layer is simultaneously deposited on the photoresist layer remaining after the patterning process and the peelable substrate exposed after exposure and development. After the metal layer is deposited, the photoresist layer is stripped, so that the metal layer on the photoresist layer is also stripped, so that the metal layer on the exposed peelable substrate forms a wire.

The metal can be deposited first and then patterned, or a liftoff process can be used.

The thickness of the metal layer may be 100 nm-2 μm.

An insulating layer can be formed on the metal wire to protect the metal wire.

Step 105: Perform patterning processing on the peelable substrate.

Specifically, the peelable substrate is preferably a polyimide substrate, and the polyimide substrate is patterned to form several first sub-polyimide substrates, several second sub-polyimide substrates, and The at least one third sub-polyimide substrate is patterned, for example, by laser processing.

Step 106: forming a device.

Specifically, to form the device on the wire, the device can be made in advance, and then the device is connected to the wire by welding. The metal material used for welding can be tin, silver, indium, etc., or other methods can be used on the wire The device is directly formed, and no specific limitation is made here.

The device can be an optoelectronic device or a sensor device.

In an embodiment, the method for preparing the stretchable display panel may further include step 107: forming an elastomer.

An elastomer is formed above and below the device to wrap the device, and the material of the elastomer includes one or more of silicone rubber, urethane, and acrylic.

The thickness of the elastomer can be 50-500 μm.

In this embodiment, the polyimide substrate is patterned by laser laser. When the polyimide substrate is patterned, part of the polyimide substrate except for the wire area and the integrated device area is reserved. Without reducing the stretching performance of the device, the area of polyimide patterning is reduced, so that the time for polyimide patterning can be shortened, the service life of the laser is prolonged, and the productivity is increased.

The above are only implementations of this application, and do not limit the scope of this application. Any equivalent structure or equivalent process transformation made by using the description and drawings of this application, or directly or indirectly applied to other related technologies In the same way, all fields are included in the scope of patent protection of this application.

Claims

A stretchable display panel, including:

A polyimide substrate, the polyimide substrate includes a plurality of first sub polyimide substrates, a plurality of second sub polyimide substrates, and at least one third sub polyimide substrate;

A first wire, the first wire being located on the first sub-polyimide substrate and the second sub-polyimide substrate;

At least one first device, the first device is located on the first sub-polyimide substrate, the first wire is electrically connected to the first device, and the first device passes through the The first wire is electrically connected;

The adjacent first sub-polyimide substrates are connected by the second sub-polyimide substrates to form a closed area, and the third sub-polyimide substrate is located in the closed area ；

The first sub-polyimide substrate, the second sub-polyimide substrate, the first device, and the first wire form a first device group.
The stretchable display panel according to claim 1, wherein:

The shape of the orthographic projection of the first wire on the first sub-polyimide substrate is a straight line;

The orthographic projection shape of the first wire on the second sub-polyimide substrate is a straight line or a curve.
The stretchable display panel according to claim 2, wherein:

The orthographic projection of the first wire on the first sub-polyimide substrate and the second sub-polyimide substrate is located on the first sub-polyimide substrate and the second sub-polyimide substrate. In the central area of the imide substrate, the width of the first wire is less than or equal to the width of the second sub-polyimide substrate.
The stretchable display panel according to claim 1, further comprising a second device group;

The second device group includes a fourth sub-polyimide substrate, a fifth sub-polyimide substrate, a second device, and a second wire;

The fourth sub-polyimide substrate is located on the third sub-polyimide substrate; the second device and part of the second wire are located on the fourth sub-polyimide substrate Another part of the second wire is located on the fifth sub-polyimide substrate;

The second wire is electrically connected to the second device, and the second device group is connected to each other through the second wire.
The stretchable display panel according to claim 4, further comprising a first intermediate layer;

Wherein, the first intermediate layer is located between the third sub-polyimide substrate and the fourth sub-polyimide substrate;

The first intermediate layer material includes an elastic material.
The stretchable display panel according to claim 5, wherein the material of the first intermediate layer is polydimethylsiloxane.
The stretchable display panel according to claim 4, further comprising a second intermediate layer;

Wherein, the second intermediate layer is located on the side of the first sub-polyimide substrate away from the first device, and the fourth sub-polyimide substrate is away from the second device. side;

The second device group and the first device group are respectively located on the upper and lower sides of the second intermediate layer.
The stretchable display panel according to claim 7, wherein:

The thickness of the first intermediate layer and the second intermediate layer are both less than 10 μm.
The stretchable display panel according to claim 1, further comprising an elastomer that wraps the first sub-polyimide substrate, the second sub-polyimide substrate, and the The third sub-polyimide substrate, the first wire and the first device.
The stretchable display panel according to claim 4, further comprising an elastomer that wraps the first sub-polyimide substrate, the second sub-polyimide substrate, and the The third sub-polyimide substrate, the first wire, the first device, the fourth sub-polyimide substrate, the fifth sub-polyimide substrate, the first Two devices and the second wire.
The stretchable display panel of claim 1, wherein the third sub-polyimide substrate is independent of the first sub-polyimide substrate and the second sub-polyimide substrate bottom.
The stretchable display panel of claim 1, wherein the at least one first device includes a plurality of first devices, and the plurality of first devices are electrically connected to each other through the first wire.
The stretchable display panel of claim 1, wherein the first sub-polyimide substrate, the second sub-polyimide substrate, and the third sub-polyimide substrate Same layer settings.
The stretchable display panel according to claim 5, wherein the overlapping area of the first device group and the second device group is separated by the first intermediate layer.
4. The stretchable display panel of claim 4, wherein the second device group is located in a gap of the first device group.
4. The stretchable display panel of claim 4, wherein the second wire is located in a central area of the third sub-polyimide substrate, and the width of the second wire is less than or equal to the third sub-polyimide substrate. The width of the imine substrate.
The stretchable display panel according to claim 4, wherein the first sub-polyimide substrate and the third sub-polyimide substrate are arranged in the same layer, and the fourth sub-polyimide substrate The amine substrate and the fifth sub-polyimide substrate are arranged in the same layer.
8. The stretchable display panel of claim 7, further comprising a sixth sub-polyimide substrate, the first sub-polyimide substrate and the third sub-polyimide substrate The fourth sub-polyimide substrate and the sixth sub-polyimide substrate are provided in the same layer.
A stretchable display device includes a stretchable display panel; the stretchable display panel includes:

A polyimide substrate, the polyimide substrate includes a plurality of first sub polyimide substrates, a plurality of second sub polyimide substrates, and at least one third sub polyimide substrate;

A first wire, the first wire being located on the first sub-polyimide substrate and the second sub-polyimide substrate;

At least one first device, the first device is located on the first sub-polyimide substrate, the first wire is electrically connected to the first device, and the first device passes through the The first wire is electrically connected;

The adjacent first sub-polyimide substrates are connected by the second sub-polyimide substrates to form a closed area, and the third sub-polyimide substrate is located in the closed area ；

The first sub-polyimide substrate, the second sub-polyimide substrate, the first device, and the first wire form a first device group.
A method for preparing a stretchable display panel includes:

Coating a peelable substrate on the substrate;

Coating a photoresist layer, and patterning the photoresist layer;

Depositing a metal layer, and patterning the metal layer;

Patterning the peelable substrate;

Forming a device; and

Form an elastomer.