CN113497095A

CN113497095A - Stretchable display device and method of manufacturing the same

Info

Publication number: CN113497095A
Application number: CN202010269858.3A
Authority: CN
Inventors: 陈龙
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd; Royole Corp
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2021-10-12

Abstract

The application provides a stretchable display device and a preparation method thereof. The stretchable display device includes: a stretchable base layer; the display units are arranged on the stretchable base layer at intervals and comprise cathode layers, light emitting layers and anode layers which are arranged in a stacked mode; a conductive layer is further arranged in the stretchable base layer, and cathode layers of the plurality of display units are electrically connected with the conductive layer; when the stretchable base layer is stretched, the conductive layer deforms as the stretchable base layer stretches. When the stretchable display device is stretched, the conductive layer deforms along with the stretching of the stretchable substrate layer, so that the performance of the stretchable display device when stretched can be guaranteed.

Description

Stretchable display device and method of manufacturing the same

Technical Field

The application relates to the technical field of display, in particular to a stretchable display device and a preparation method thereof.

Background

With the development of technology, the diversified demands of consumers on electronic products are higher and higher. Stretchable display devices are favored by consumers because they have stretchable properties that are different from other conventional electronic devices. However, for various reasons, the yield is not high when the stretchable display device is manufactured.

Disclosure of Invention

A first aspect of the present application provides a method of manufacturing a stretchable display device, the method including:

providing a stretchable substrate layer having a conductive layer embedded therein;

and forming a plurality of display units arranged on the stretchable base layer at intervals, wherein each display unit comprises a cathode layer, a light-emitting layer and an anode layer which are arranged in a stacked mode, the cathode layer is electrically connected with the conductive layer, and when the stretchable base layer is stretched, the conductive layer deforms along with the stretching of the stretchable base layer.

The second aspect of the present application also provides a stretchable display device including:

a stretchable base layer;

the display units are arranged on the stretchable base layer at intervals and comprise cathode layers, light emitting layers and anode layers which are arranged in a stacked mode;

a conductive layer is further arranged in the stretchable base layer, and cathode layers of the plurality of display units are electrically connected with the conductive layer;

when the stretchable base layer is stretched, the conductive layer deforms as the stretchable base layer stretches.

The stretchable display device and the stretchable display device manufactured by the manufacturing method of the stretchable display device deform when stretched, the conductive layer and the cathode layer are arranged in a stacked mode instead of in the same layer mode, and the conductive layer deforms along with the stretching of the stretchable substrate, so that the stretchable display device is not prone to being broken when stretched, and the performance of the stretchable display device is guaranteed.

Drawings

Fig. 1 is a flowchart of a method for manufacturing a stretchable display device according to an embodiment of the present application.

Fig. 2 is a schematic flowchart included in S100 in fig. 1.

Fig. 3 is a schematic flowchart included in S110 in fig. 2.

Fig. 4 is a schematic flowchart included in S111 in fig. 3.

Fig. 5 to 14 and 16 to 20 are schematic structural diagrams corresponding to the manufacturing method of the stretchable display device.

Fig. 15 is a flowchart included in S300 in fig. 1.

Fig. 21 is a flowchart illustrating a method of manufacturing a stretchable display device according to still another embodiment.

Fig. 22 is a flowchart included in S120 in fig. 2 according to another embodiment.

Fig. 23 is a top view of a stretchable display device according to another embodiment of the present application.

Fig. 24 is a schematic view of a stretchable display device in a relaxed state according to an embodiment of the present application.

Fig. 25 is a schematic view of a stretchable display device according to an embodiment of the present application in a stretched state.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

The present application provides a method of manufacturing a stretchable display device 1. Referring to fig. 1, fig. 1 is a flowchart illustrating a method for manufacturing a stretchable display device according to an embodiment of the present disclosure. The method of manufacturing the stretchable display device 1 includes, but is not limited to, including: s100, S200, and S300, and S100, S200, and S300 are described in detail below.

S100, providing a stretchable substrate layer 110, the stretchable substrate layer 110 having a conductive layer 130 embedded therein.

The stretchable substrate layer 110 may be made of any elastic material. For example, the stretchable substrate layer 110 may be made of any one or more of silicone, rubber, polyvinyl chloride (PVC), polytetrafluoroethylene (ptfe), Polyurethane (PU), polyvinyl chloride (PVC), Polydimethylsiloxane (PDMS), and the like.

In one embodiment, the conductive layer 130 may be made of, but not limited to, a conductive metal, such as silver, magnesium, etc. In another embodiment, the conductive layer 130 may be made of, but not limited to, a transparent metal oxide layer, such as indium tin oxide.

Referring to fig. 2, a method for manufacturing the stretchable display device 1 will be described in detail with reference to the drawings, and fig. 2 is a schematic flow chart included in S100 in fig. 1.

S100 includes S110, S120, and S130. S110, S120, and S130 are described in detail below.

S110, providing a first elastic body 111, where the first elastic body 111 includes an elastic body 1111 and a plurality of extending portions 1112 arranged at intervals, a bottom surface 110a of the elastic body 1111 constitutes the bottom surface 110a of the stretchable substrate layer 110, and the extending portions 1112 extend from the elastic body 1111 toward a direction away from the bottom surface 110 a.

The material of the first elastic body 111 may be, but is not limited to, any one or more of silicone rubber, polyvinyl chloride, polytetrafluoroethylene, Polyurethane (PU), polyvinyl chloride (PVC), Polydimethylsiloxane (PDMS), and the like.

The shape of the elastic body 1111 may be, but not limited to, a square or a rectangular parallelepiped. The elastic body 1111 includes a bottom surface 110a, and the bottom surface 110a of the elastic body 1111 constitutes the bottom surface 110a of the stretchable substrate layer 110. The plurality of extending portions 1112 are disposed at intervals on a surface of the elastic body 1111 facing away from the bottom surface 110 a. In one embodiment, the plurality of extensions 1112 and the elastic body 1111 are a unitary structure. In another embodiment, the plurality of extensions 1112 and the elastic body 1111 are formed as separate bodies and then bonded together by a bonding member. In the following description, the plurality of extending portions 1112 and the elastic body 1111 are exemplified as an integral structure. The cross-section of the extension 1112 may be, but is not limited to, semi-circular, semi-elliptical, etc.

In one embodiment, please refer to fig. 3, wherein fig. 3 is a flowchart included in S110 in fig. 2. S110, providing a first elastic body 111, where the first elastic body 111 includes an elastic body 1111 and a plurality of extending portions 1112 arranged at intervals, including S111, S112, S113, and S114; s111, S112, S113, and S114 are described in detail below.

S111, providing a patterned carrier 30, wherein the patterned carrier 30 includes a carrier body 310 and a plurality of protrusions 320 extending from one side of the carrier body 310 at intervals.

The patterned carrier plate 30 is used to prepare the first elastic body 111. The preparation method of the carrier plate 30 is described as follows.

In one embodiment, please refer to fig. 4, and fig. 4 is a schematic flowchart included in S111 in fig. 3. S111, the providing of the patterned carrier plate 30 includes: s1111, S1112, and S1113. S1111, S1112, and S1113 are described in detail below.

S1111, providing the carrier plate 30.

Please refer to fig. 5. The shape of the carrier plate 30 may be, but is not limited to, a square or a rectangular parallelepiped.

S1112, covering the surface of the carrier 30 with a second photoresist layer 70, where the second photoresist layer 70 includes a plurality of photoresist units 710 arranged at intervals.

Referring to fig. 6, the second photoresist layer 70 covers the surface of the carrier 30, and the photoresist units 710 are disposed at intervals to expose a portion of the surface of the carrier 30. It is understood that, in one embodiment, the method for forming the second photoresist layer 70 includes: covering a photoresist material on the surface of the carrier 30 to form an original photoresist layer; providing a mask plate on one side of the original photoresist layer, which is far away from the bearing plate 30, wherein the mask plate comprises a plurality of light-transmitting parts and non-light-transmitting parts which are arranged at intervals; taking the mask plate as a mask, and irradiating light from one side of the mask plate, which is far away from the original light resistance layer; the original photoresist layer is then developed by a developing process to obtain the second photoresist layer 70.

S1113, the carrier 30 is etched by the second photoresist layer 70 to remove a portion of the material in the carrier 30 not covered by the second photoresist unit 710, so as to form the patterned carrier 30.

Referring to fig. 7, a portion of the material of the carrier 30 not covered by the second photoresist unit 710 is etched away, and a portion of the carrier 30 covered by the second photoresist unit 710 is not etched due to the protection of the second photoresist unit 710, so that after the second photoresist layer 70 is removed, a plurality of protrusions 320 are formed on the surface of the carrier 30 at intervals. In other words, the patterned carrier plate 30 includes a carrier body 310 and a plurality of protrusions 320 extending from one side of the carrier body 310 at intervals. The shape of the protrusion 320 may be, but is not limited to, a square or a rectangular parallelepiped.

S112, covering the patterned carrier plate 30 with a first photoresist layer 50, where the first photoresist layer 50 includes a protrusion 510 covering the protruding portion 320 and a recess 520 covering between two adjacent protruding portions 320.

Referring to fig. 8, the cross section of the first photoresist layer 50 may be, but not limited to, a wave shape.

S113, covering the elastic material 100a on the first photoresist layer 50; please refer to fig. 9.

S114, separating the elastic material 100a from the first photoresist layer 50 to form a first elastic body 111.

Referring to fig. 10, after the elastic material 100a is separated from the first photoresist layer 50, the pattern of the first photoresist layer 50 is transferred to the first elastomer 111.

S120, forming the conductive layer 130 on the first elastic body 111.

In one embodiment, please refer to fig. 11, where fig. 11 is a flowchart included in S120 of fig. 2 according to one embodiment.

S120, the forming the conductive layer 130 on the first elastic body 111 includes: S121-I, S121-I are described in detail below.

S121-I, forming a whole conductive material layer on the first elastic body 111, wherein the conductive material layer covers the first elastic body 111, and the conductive material layer constitutes the conductive layer 130.

Referring to fig. 12, the material of the conductive material layer may be, but is not limited to, a conductive metal, such as silver, magnesium, etc. The entire layer of the conductive material may be formed on the first elastic body 111 by, but not limited to, vapor deposition or the like. The thickness of the conductive material layer is equal or approximately equal throughout. The shape of the conductive layer 130 is wave-shaped or substantially wave-shaped, so that the conductive layer 130 can be stretched in one direction or multiple directions.

And S130, covering a second elastic body 112 on the side, away from the first elastic body 111, of the conductive layer 130.

Referring to fig. 13, the second elastic body 112 is fixed to the first elastic body 111, so that the conductive layer 130 is sandwiched between the first elastic body 111 and the second elastic body 112. The first elastomer 111 and the second elastomer 112 constitute the stretchable base layer 110.

S200, a plurality of driving modules 140 carried on the stretchable base layer 110 are formed, and the driving modules 140 and the conductive layer 130 are disposed at intervals.

Referring to fig. 14, in the present embodiment, the plurality of driving modules 140 are carried on a surface of the stretchable base layer 110 away from the bottom surface 110 a. The driving module 140 is used for driving the display unit 120 to emit light.

S300, forming a plurality of display units 120 disposed on the stretchable base layer 110 at intervals, where the display units 120 include a cathode layer 123, a light emitting layer 122, and an anode layer 121, the cathode layer 123 is electrically connected to the conductive layer 130, and when the stretchable base layer 110 is stretched, the conductive layer 130 deforms along with the stretching of the stretchable base layer 110.

Referring to fig. 15, fig. 15 is a schematic flowchart of S300 in fig. 1. In this embodiment, S300 may include, but is not limited to, S310, S320, S330, and S340. S310, S320, S330 and S340 are described in detail below.

S310, forming a first through hole 141 on the driving module 140, and forming a second through hole 113 on the stretchable base layer 110, the second through hole 113 communicating with the first through hole 141, the second through hole 113 exposing a portion of the conductive layer 130; please refer to fig. 16.

S320, forming a connecting wire 150 in the through hole, wherein one end of the connecting wire 150 is electrically connected with the conductive layer 130; please refer to fig. 17.

The connection line 150 may be made of, but not limited to, metal, the diameters of the first through hole 141 and the second through hole 113 may be designed according to the conductivity of the connection line 150 and the distribution of the display units 120 in the driving module 140, the thickness of the diameter of the connection line 150 is related to the contact resistance between the cathode and the conductive layer 130, and therefore, the size of the connection line 150 may be designed such that the contact resistance between the cathode and the conductive layer 130 is small.

S330, forming a receiving groove 142 on the driving module 140, and forming an anode layer 121 and a light emitting layer 122 stacked in sequence in the receiving groove; please refer to fig. 18.

S340, forming a cathode layer 123 on a surface of the driving module 140 away from the conductive layer 130, where the cathode layer 123 is electrically connected to the other end of the connection line 150. Please refer to fig. 19 and fig. 20. Fig. 20 is a top view of a partial structure of a stretchable display device. The cathode layer 123 of the display unit 120 is disposed on the upper surface of the driving module 140.

In one embodiment, a plurality of display units 120 may be disposed on one driving module 140, or one display unit 120 may be disposed on one driving module 140. When a plurality of display units 120 are disposed on one driving module 140, the plurality of display units 120 disposed on the same driving module 140 may belong to the same pixel or belong to different pixels. In the present embodiment, three display units 120 are disposed on one driving module 140 as an example. The three display units 120 are a red display unit 120a, a green display unit 120b, and a blue display unit 120c, respectively.

In one embodiment, the anode layer 121 is disposed adjacent to the conductive layer 130 as compared to the cathode layer 123. The anode layer 121 is configured to receive a positive voltage signal and generate holes under the action of the positive voltage signal; the cathode layer 123 is configured to receive a negative voltage signal and generate electrons under the action of the negative voltage signal; holes generated by the anode layer 121 and electrons generated by the cathode layer 123 recombine in the light emitting layer 122 to make the display unit 120 emit light. It is understood that the driving module 140 includes a circuit for controlling the transmission of the positive voltage signal and the negative voltage signal.

In one embodiment, the light emitting surface of the display unit 120 faces away from the conductive layer 130. In other words, the light emitted by the display unit 120 is emitted from the cathode, and the conductive layer 130 is not on the light emitting surface of the display unit 120, so that the influence of the conductive layer 130 on the light emitting efficiency of the display unit 120 does not need to be considered, and the thickness of the conductive layer 130 can be designed to be thicker, so that the sheet resistance of the conductive layer 130 can be effectively reduced. Further, the uniformity of display of the manufactured stretchable display device 1 can be improved.

It is understood that in the present embodiment, the cathodes of the plurality of display units 120 located on the same driving module 140 are connected together to shorten the manufacturing process. In other embodiments, the cathodes of multiple display units 120 located on the same driving module 140 are independent of each other.

In the conventional technology, the cathode layers are connected by the stretchable connecting line disposed on the same layer, which may result in a large sheet resistance of the cathode layers, and may further affect the uniformity of the stretchable display device 1 during display. In addition, the conventional connecting wire is easy to age and break in a continuous stretching process, so that the surface resistance of the cathode layers is further increased, and even the connection between the cathode layers fails. In the method for manufacturing the stretchable display device 1, the cathode layer 123 of the display unit 120 is electrically connected to the conductive layer 130 stacked and spaced with the cathode layer 123 through the connection line 150, and when the stretchable display device 1 is stretched, the conductive layer 130 deforms along with the stretching of the stretchable base layer 110, so that the performance of the stretchable display device 1 when being stretched can be ensured. In other words, what is deformed when the stretchable display device 1 is stretched is the conductive layer 130 disposed to be stacked with the cathode layer 123, and the connection line 150 is deformed less or substantially without deformation. Therefore, the probability of the connecting line 150 being broken by stretching is reduced, and it can be seen that the stretchable display device 1 manufactured by the method for manufacturing the stretchable display device 1 of the present application has a high yield and a good uniformity in displaying.

In one embodiment, the method for manufacturing the stretchable substrate includes steps S100 and S300, please refer to fig. 21, which is a flowchart illustrating a method for manufacturing a stretchable display device according to yet another embodiment.

It is to be understood that, in one embodiment, please refer to fig. 22, and fig. 22 is a flowchart included in S120 in fig. 2 according to another embodiment. S120, the forming the conductive layer 130 on the first elastic body 111 includes: S121-II and S122-II, S121-II and S122-II are described in detail below.

S121-II, forming a whole layer of conductive material layer on the first elastic body 111;

S122-II, patterning the conductive material layer to form a plurality of hollow structures 133 to expose a portion of the first elastic body 111, so as to obtain the conductive layer 130. Referring to fig. 23, a schematic diagram of a finally formed stretchable display device 1 is shown, and fig. 23 is a top view of a stretchable display device according to another embodiment of the present application.

The present application also provides a stretchable display device 1, which stretchable display device 1 may be, but is not limited to, a stretchable mobile phone, an electronic book, etc. The stretchable display device 1 may be prepared by the method of preparing the stretchable display device 1 described above. Referring to fig. 20, 24 and 25 together, fig. 24 is a schematic view illustrating a stretchable display device in a relaxed state according to an embodiment of the present application; fig. 25 is a schematic view of a stretchable display device according to an embodiment of the present application in a stretched state.

The stretchable display device 1 includes:

a stretchable base layer 110;

a plurality of display units 120 disposed on the stretchable base layer 110 at intervals, wherein the display units 120 include a cathode layer 123, a light emitting layer 122, and an anode layer 121 stacked one on another;

a conductive layer 130 is further disposed within the stretchable base layer 110, and the cathode layers 123 of the plurality of display cells 120 are electrically connected to the conductive layer 130;

when the stretchable base layer 110 is stretched, the conductive layer 130 deforms as the stretchable base layer 110 stretches.

When the stretchable display device 1 is in a relaxed state, at which time the stretchable display device 1 is not stretched and the stretchable substrate is not stretched, at which time the conductive layer 130 is wavy, the specific structure of the conductive layer 130 is described in detail later. When the stretchable display device 1 is in a stretched state, the stretchable base layer is stretched, and the conductive layer 130 is flattened as the stretchable base layer is stretched.

In the conventional technology, the cathode layers 123 are connected by the stretchable connecting wires disposed on the same layer, which results in a large sheet resistance of the cathode layers 123, and further affects the uniformity of the display of the stretchable display device 1. In addition, the conventional connection wire 150 is prone to aging and fracture during the continuous stretching process, which further increases the sheet resistance of the cathode layers 123 and even causes the connection between the cathode layers 123 to fail. In the stretchable display device 1 of the present application, the cathode layer 123 of the display unit 120 in the stretchable display device 11 is electrically connected to the conductive layer 130 stacked and spaced with the cathode layer 123 through the connection line 150, and when the stretchable display device 1 is stretched, the conductive layer 130 deforms along with the stretching of the stretchable base layer 110, so that the performance of the stretchable display device 1 when stretched can be ensured. In other words, what is deformed when the stretchable display device 1 is stretched is the conductive layer 130 disposed to be stacked with the cathode layer 123, and the connection line 150 is deformed less or substantially without deformation. Therefore, the probability of the connecting line 150 being broken by stretching is reduced, and thus it can be seen that the stretchable display device 1 of the present application has a high yield and a good uniformity in displaying.

In one embodiment, the stretchable base layer 110 includes a bottom surface 110a facing away from the plurality of display units 120, and the conductive layer 130 includes a plurality of first conductive portions 131 protruding toward a direction facing away from the bottom surface 110a and a plurality of second conductive portions 132 protruding toward a direction close to the bottom surface 110a, wherein the first conductive portions 131 are electrically connected to the second conductive portions 132, and when the stretchable base layer 110 is in a stretched state, the conductive layer 130 is stretched and flattened.

In one embodiment, the display unit 120 is provided with a first through hole 141 extending from the cathode layer 123 to the stretchable base layer 110, a connection line 150 is provided in the first through hole 141, a first end of the connection line 150 is electrically connected to the cathode layer 123, and a second end of the connection line 150 is electrically connected to the conductive layer 130 in the stretchable base layer 110.

In one embodiment, the stretchable base layer 110 is provided with a second through hole 113 corresponding to the first through hole 141, and the second end of the connection line 150 is electrically connected to the conductive layer 130 through the second through hole 113.

In one embodiment, the stretchable display device includes a plurality of driving modules 140, the plurality of driving modules 140 are disposed at intervals with the conductive layer 130, the cathode layer 123 is disposed on an upper surface of the driving modules 140, and the driving modules 140 are configured to drive the display units 120 in the stretchable display device 1 to emit light.

In one embodiment, the driving module 140 includes a plurality of device regions 140a and a non-device region 140b, the device region 140a corresponds to a pixel region of the display unit 120, and the first via hole 141 penetrates the non-device region 140 b.

The device region 140a is a region where the driving circuit in the driving module 140 is disposed, and the non-device region 140b is not provided with the driving circuit. The first via 141 is disposed in the non-device region 140b, so that the connection line 150 in the first via 141 can be prevented from interfering with the driving circuit in the device region 140 a.

In one embodiment, when a plurality of display units 120 are carried by one driving module 140, the cathode layers 123 of the plurality of display units 120 carried by the same driving module 140 are connected.

In one embodiment, the stretchable base layer 110 comprises:

a first elastic body 111, the first elastic body 111 comprising an elastic body 1111 and a plurality of extension portions 1112 arranged at intervals, wherein the bottom surface 110a of the elastic body 1111 constitutes the bottom surface 110a of the stretchable substrate layer 110, and the extension portions 1112 extend from the elastic body 1111 towards the direction away from the bottom surface 110 a; the first conductive part 131 of the conductive layer 130 is disposed on the extension parts 1112, and the second conductive part 132 of the conductive layer 130 is disposed between the adjacent extension parts 1112;

and a second elastic body 112, wherein the second elastic body 112 is arranged on the surface of the conductive layer 130, which faces away from the first elastic body 111.

In this embodiment, the stretchable base layer 110 includes a first elastic body 111 and a second elastic body 112, and the first elastic body 111 and the second elastic body 112 together form the stretchable base layer 110, so that the conductive layer 130 is embedded in the stretchable base layer 110.

In one embodiment, at least one of the protruding direction of the first conductive portion 131 and the protruding direction of the second conductive portion 132 is perpendicular to the extending direction of the conductive layer 130.

When the protruding direction of the first conductive part 131 is perpendicular to the extending direction of the conductive layer 130, when the stretchable display device 1 is stretched, the first conductive part 131 has better extending performance and is not easily broken by pulling. Similarly, when the protruding direction of the second conductive part 132 is perpendicular to the extending direction of the conductive layer 130, when the stretchable display device 1 is stretched, the extending performance of the second conductive part 132 is better and the second conductive part is not easily broken by pulling

In the stretchable display device 1 described above, the conductive layer 130 is taken as an example of a whole layer structure and does not include the hollow structure 133. In other embodiments, referring to fig. 23, the conductive layer 130 includes a hollow structure 133, and the hollow structure 133 penetrates through two opposite surfaces of the conductive layer 130, wherein one of the two opposite surfaces of the conductive layer 130 faces the bottom surface 110 a.

The hollow structure 133 may be, but not limited to, a through hole, and when the conductive layer 130 includes the hollow structure 133, the material consumption of the conductive layer 130 can be reduced. In an embodiment, the hollow structure 133 may be disposed corresponding to the conductive layer 130 and the device region 140 a. At this time, even if the light emitting surface of the display unit 120 faces the bottom surface 110a of the stretchable base layer 110, due to the hollow structure 133, the arrangement of the conductive layer 130 has little or no influence on the light emitting of the display unit 120. Of course, in other embodiments, the hollow-out structures 133 are disposed corresponding to the gaps between the adjacent driving modules 140. In the schematic diagram of the present embodiment, the hollow structure 133 is taken as an example corresponding to the gap between the adjacent driving modules 140.

The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A method for manufacturing a stretchable display device, the method comprising:

2. The method of making a stretchable display device of claim 1, wherein said providing a stretchable substrate layer having a conductive layer embedded therein comprises:

providing a first elastic body, wherein the first elastic body comprises an elastic body and a plurality of extension parts arranged at intervals, the bottom surface of the elastic body forms the bottom surface of the stretchable substrate layer, and the extension parts extend from the elastic body towards the direction departing from the bottom surface;

forming the conductive layer on the first elastic body;

and covering a second elastic body on the side of the conductive layer, which faces away from the first elastic body.

3. The method for preparing a stretchable display device according to claim 2, wherein the providing a first elastic body comprising an elastic body and a plurality of extensions arranged at intervals comprises:

providing a patterned bearing plate, wherein the patterned bearing plate comprises a bearing body and a plurality of bulges which are arranged at intervals and extend from one side of the bearing body;

covering a first photoresist layer on the patterned bearing plate, wherein the first photoresist layer comprises a protruding part covering the protruding parts and a concave part covering between two adjacent protruding parts;

covering an elastic material on the first photoresist layer;

separating the elastic material from the first photoresist layer to form a first elastomer.

4. The method of making a stretchable display device according to claim 3, wherein the providing of the patterned carrier sheet comprises:

providing a bearing plate;

covering a second light resistance layer on the surface of the bearing plate, wherein the second light resistance layer comprises a plurality of light resistance units arranged at intervals;

and etching the bearing plate by using the second photoresist layer to etch away part of the material in the bearing plate which is not covered by the second photoresist unit so as to form the patterned bearing plate.

5. The method of making a stretchable display device according to claim 2, wherein said forming said conductive layer on said first elastomer comprises:

forming an entire layer of conductive material on the first elastomer;

and patterning the conductive material layer to form a plurality of hollow structures so as to expose part of the first elastic body, thereby obtaining the conductive layer.

6. The method of making a stretchable display device according to claim 2, wherein said forming said conductive layer on said first elastomer comprises:

and forming a whole layer of conductive material layer on the first elastic body, wherein the conductive material layer covers the first elastic body and forms the conductive layer.

7. The method of manufacturing a stretchable display device according to claim 1, further comprising:

forming a plurality of drive modules carried on the stretchable base layer; the plurality of driving modules and the conducting layer are arranged at intervals, the cathode layer is arranged on the upper surface of each driving module, and the driving modules are used for driving the display units to emit light.

8. A stretchable display device, characterized in that the stretchable display device comprises:

a stretchable base layer;

9. The stretchable display device of claim 8, wherein the stretchable base layer comprises a bottom surface facing away from the plurality of display cells, the conductive layer comprises a plurality of first conductive portions protruding away from the bottom surface and a plurality of second conductive portions protruding towards a direction close to the bottom surface, wherein the first conductive portions are electrically connected to the second conductive portions, and the conductive layer is stretched and flattened when the stretchable base layer is in a stretched state.

10. A stretchable display device according to claim 9, wherein the display cell is provided with a first via extending from the cathode layer to the stretchable substrate layer, a connection line is provided within the first via, a first end of the connection line being electrically connected to the cathode layer, and a second end of the connection line being electrically connected to a conductive layer within the stretchable substrate layer.

11. The stretchable display device of claim 10, wherein the stretchable base layer is provided with a second through hole corresponding to the first through hole, and the connection line second end is electrically connected to the conductive layer through the second through hole.

12. A stretchable display device according to any one of claims 8 to 11, wherein the stretchable display device comprises a plurality of driving modules, the plurality of driving modules are spaced apart from the conductive layer, the cathode layer is disposed on an upper surface of the driving modules, and the driving modules are configured to drive a display unit in the stretchable display device to emit light.

13. The stretchable display device of claim 12, wherein the driving module includes a plurality of device regions corresponding to pixel regions of the display unit and a non-device region through which the first via hole penetrates.

14. A stretchable display device according to claim 12, wherein when a plurality of display elements are carried by one driving module, the cathode layers of the plurality of display elements carried by the same driving module are connected.

15. The stretchable display device of claim 9, wherein the stretchable substrate layer comprises:

the first elastic body comprises an elastic body and a plurality of extension parts arranged at intervals, the bottom surface of the elastic body forms the bottom surface of the stretchable base layer, and the extension parts extend from the elastic body towards the direction departing from the bottom surface; the first conductive part of the conductive layer is arranged on the extension parts, and the second conductive part of the conductive layer is arranged between the adjacent extension parts;

and the second elastic body is arranged on the surface of the conductive layer, which is far away from the first elastic body.

16. The stretchable display device of claim 9, wherein at least one of the direction of protrusion of the first conductive portion and the direction of protrusion of the second conductive portion is perpendicular to the direction of extension of the conductive layer.