Display device and method of manufacturing the same

Abstract

The present application provides a display device and a manufacturing method thereof. The display device includes a flexible circuit substrate and a plurality of light emitting components. The flexible circuit substrate includes two circuit layers, two support layers and a stretchable and bendable component, the support layers are between the two circuit layers, and the stretchable and bendable component is between the two support layers. The light emitting component includes a circuit substrate and at least one light emitting element, the circuit substrate is electrically connected to one of the circuit layers, and the light emitting element is electrically connected to the circuit substrate and located on a side of the circuit substrate away from the one circuit layer. In this way, the degree of freedom and reliability of the display device can be improved, and the display area of the display device can be increased.

Description

TECHNICAL FIELD

[0001] The present application relates to a display device and a manufacturing method thereof, and in particular, to a stretchable and bendable display device and a manufacturing method thereof. BACKGROUND

[0002] With the development of electronic products, the importance of display devices is increasing. In order to expand the application level of display devices, flexible display devices have gradually become one of the development focuses of manufacturers. However, the circuit board of the current flexible display device is electrically connected between the layers of the circuit by a "via hole". The via hole is plated with copper or filled with copper paste, so that the copper in the via hole is easily broken when the flexible display device is bent, which affects the reliability of the flexible display device. In addition, in order to avoid the breakage of the copper in the via hole, the bending part of the flexible display device must avoid the via hole, which reduces the bending freedom of the flexible display device. SUMMARY

[0003] The present application provides a display device, which includes a flexible circuit substrate and a plurality of light emitting components. The flexible circuit substrate includes two circuit layers, two support layers and a stretchable and bendable component. The support layers are located between the two circuit layers and are opposite to each other, wherein each of the support layers has a bending portion which protrudes away from each other to form a receiving space between the two support layers. The stretchable and bendable component is located in the receiving space and includes two positioning members, a shaft member, two elastic members and an elastic component. The positioning members are fixed between the two support layers, wherein the bending portions are located between the two positioning members. The shaft member includes a penetrating portion and two abutting blocks, the penetrating portion penetrates the two positioning members, and the abutting blocks are connected to the two ends of the penetrating portion and are clamped between the two support layers, wherein the two positioning members are located between the two abutting blocks. The elastic members are respectively abutted to the two positioning members and the two abutting blocks, wherein each of the elastic members is located between one of the abutting blocks and one of the positioning members adjacent to each other. The elastic component is fixed on the shaft member and located between the bending portions of the two support layers. The light emitting components are arranged on the two support layers, wherein each of the light emitting components includes a circuit substrate and at least one light emitting element. The circuit substrate is electrically connected to one of the circuit layers. The light emitting element is electrically connected to the circuit substrate and located on the side of the circuit substrate away from the one circuit layer. When the display device in an initial state is bent to a bent state, the elastic component is compressed by the two support layers and shrinks. When the display device in the bent state returns to the initial state, the elastic component is stretched and pushes the bending portions. When the display device in the initial state is stretched to a stretched state, the positioning members move relative to the shaft member and compress the two elastic members. When the display device in the stretched state returns to the initial state, the two elastic members are stretched and drive the positioning members to reset.

[0004] In some embodiments, each of the support layers has at least two flat portions on two sides of the curved portion, wherein the curved portion is between two adjacent light emitting components, and the circuit layer is disposed on the flat portions.

[0005] In some embodiments, the elastic assembly further comprises a fixing seat fixed on the through portion, and an elastic body fixed on the fixing seat and abutting against the curved portions of the two support layers.

[0006] In some embodiments, the circuit substrate has a first side and a second side opposite to the first side, the circuit substrate comprises a conductive layer extending from the first side to the second side, and the circuit substrate electrically connects the circuit layer and the light emitting element through the conductive layer.

[0007] In some embodiments, each of the light emitting components further comprises a circuit element embedded in the circuit substrate, and the circuit element is electrically connected with the circuit layer and the light emitting element.

[0008] The present application further provides a manufacturing method of a display device, comprising: providing two support layers, each of the support layers being connected with a circuit layer; adhering two first positioning members to one of the two support layers; adhering two second positioning members to the other of the two support layers; bending the two support layers so that each of the support layers forms a curved portion; providing an axle assembly comprising a through portion, two abutting blocks connected to two ends of the through portion, and an elastic assembly fixed on the through portion; placing the axle assembly on the one of the support layers so that the elastic assembly abuts against the curved portion of the one of the support layers; disposing two elastic members between the two abutting blocks and the two first positioning members, respectively; pressing the other of the support layers to the one of the support layers so that the axle assembly is located between the two support layers and the elastic assembly abuts against the curved portion of the other of the support layers, wherein the two support layers are located between the two circuit layers, and the through portion is located between the two first positioning members and the two second positioning members; and electrically connecting a plurality of light emitting components to the two circuit layers to obtain a display device.

[0009] In some embodiments, each of the support layers has at least two flat portions on two sides of the curved portion, and the circuit layer is disposed on the flat portions so that the curved portion is between two adjacent light emitting components.

[0010] In some embodiments, the elastic assembly further comprises a fixing seat fixed on the through portion, and an elastic body fixed on the fixing seat and abutting against the curved portions of the two support layers.

[0011] In some embodiments, the step of forming the light emitting assembly comprises providing an insulating layer having a first surface and a second surface opposite to the first surface. A conductive layer is formed on the first surface. An adhesive layer is formed on the second surface. The insulating layer is folded such that the insulating layer and the conductive layer are bent, and the adhesive layer is at least partially sandwiched by the insulating layer, to form a circuit substrate.

[0012] In some embodiments, each of the light emitting assembly further comprises a circuit element embedded in the circuit substrate, and the circuit element is electrically connected with the circuit layer and the light emitting element. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 schematic cross-sectional view of a display device according to some embodiments of the present disclosure;

[0014] Figures 2A-2L schematic cross-sectional views of a manufacturing method of a display device according to some embodiments of the present disclosure at respective stages of the process;

[0015] Figures 3A-3D schematic cross-sectional views of a manufacturing method of a display device according to some embodiments of the present disclosure at respective stages of the process;

[0016] Figures 4A-4F schematic cross-sectional views of a manufacturing method of a display device according to some embodiments of the present disclosure at respective stages of the process.

[0017] SYMBOL DESCRIPTION

[0018] 100: display device

[0019] 110: flexible circuit substrate

[0020] 111: circuit layer

[0021] 111a: connection layer

[0022] 112: support layer

[0023] 112a: bending portion

[0024] 112b: flat portion

[0025] 112c: accommodation portion

[0026] 113: stretchable and bendable assembly

[0027] 114: positioning member

[0028] 114a: first positioning component

[0029] 114b: second positioning member

[0030] 115: shaft member

[0031] 116: through portion

[0032] 117: stopper

[0033] 118: elastic element

[0034] 119: elastic assembly

[0035] 119a: fixing seat

[0036] 119b: elastic body

[0037] 120: light emitting assembly

[0038] 121: circuit substrate

[0039] 121a: first side

[0040] 121b: second side

[0041] 122: light emitting element

[0042] 123: conductive layer

[0043] 123a: gold layer

[0044] 123b: protective layer

[0045] 124: circuit element

[0046] 125: insulating layer

[0047] 125a: first surface

[0048] 125b: second surface

[0049] 126: adhesive layer

[0050] 130: filling layer

[0051] 140: circuit material layer

[0052] 150: shaft member group

[0053] 160: bonding layer

[0054] M: high modulus material. DETAILED DESCRIPTION

[0055] The following application incorporates numerous different embodiments or examples for implementing different features of the provided subject matter. Specific examples of elements, numerical values, operations, materials, configurations, and the like are described below to simplify the present application. Of course, the described are merely examples and are not intended to be limiting. Other elements, numerical values, operations, materials, configurations, and the like are contemplated. For example, in the following description, forming a first feature over a second feature can include embodiments in which the first feature and the second feature are formed in direct contact, and can also include embodiments in which additional features can be formed between the first feature and the second feature such that the first feature and the second feature do not directly contact. Additionally, reference numerals and / or letters in the present application can be repeated in various examples. Such repetition is not to be understood as indicating a relationship between the various embodiments and / or configurations discussed.

[0056] In the following detailed description, for the purposes of clarity and illustration, the dimensions (e.g., length, width, thickness, and / or depth) of the elements (e.g., layers, films, substrates, and regions) of the drawings are not to scale as necessary, and numbers of elements may

[0057] Reference will now be made to FIG. 1, which shows a cross-sectional view of a display device 100 according to some embodiments of the present application. In some embodiments of the present application, the display device 100 includes a flexible circuit substrate 110 and a plurality of light emitting components 120 fixed to and electrically connected to the flexible circuit substrate 110. Figure 1 Figure 1 In detail, the flexible circuit substrate 110 includes two circuit layers 111, two support layers 112, and a stretchable and bendable component 113. The circuit layers 111 provide the function of electrical connection, and current can be input to the light emitting components 120 through the circuit layers 111. The support layers 112 can carry the light emitting components 120 and have a certain elasticity so that the display device 100 can be stretched or bent. The stretchable and bendable component 113 can drive other elements to return to their original positions after the display device 100 is stretched or bent. The detailed operation mode will be described in subsequent paragraphs, and will not be described here.

[0058] In detail, the flexible circuit substrate 110 includes two circuit layers 111, two support layers 112, and a stretchable and bendable component 113. The circuit layers 111 provide the function of electrical connection, and current can be input to the light emitting components 120 through the circuit layers 111. The support layers 112 can carry the light emitting components 120 and have a certain elasticity so that the display device 100 can be stretched or bent. The stretchable and bendable component 113 can drive other elements to return to their original positions after the display device 100 is stretched or bent. The detailed operation mode will be described in subsequent paragraphs, and will not be described here.

[0059] ​The support layers 112 are located between the two circuit layers 111 and face each other, wherein each of the support layers 112 has a curved portion 112a which protrudes towards a direction away from each other to form a receiving space (not shown) between the two support layers 112, and the stretchable and bendable assembly 113 is located in the receiving space. The material of the support layers 112 can be polyimide (PI) or polyethylene terephthalate (PET) so as to form the curved portion 112a, and the receiving space between the support layers 112 can also reserve a certain distance (i.e. the horizontal length of the receiving space) for the display device 100 to stretch or bend in addition to accommodating the stretchable and bendable assembly 113.

[0060] In some embodiments, each of the support layers 112 has at least two flat portions 112b, and the flat portions 112b are respectively located on both sides of the curved portion 112a, wherein the curved portion 112a is located between two adjacent light emitting assemblies 120, and the circuit layer 111 is arranged on the flat portion 112b, which is helpful for assembling the light emitting assembly 120. In addition, the circuit layer 111 is limited to be arranged on the flat portion 112b and is not arranged on any curved portion 112a, so as to avoid affecting the bending of the display device 100, thereby improving the smoothness when bending the display device 100.

[0061] The stretchable and bendable assembly 113 includes two positioning members 114, a shaft member 115, two elastic elements 118 and an elastic assembly 119. The positioning members 114 are fixed between the two support layers 112, wherein the curved portion 112a is located between the two positioning members 114. The shaft member 115 includes a penetrating portion 116 and two abutting blocks 117, the penetrating portion 116 penetrates the two positioning members 114, and the abutting blocks 117 are connected to both ends of the penetrating portion 116 and are clamped between the two support layers 112, wherein the two positioning members 114 are located between the two abutting blocks 117. The positioning members 114 can move relative to the shaft member 115, and the abutting blocks 117 of the shaft member 115 can limit the movement range of the positioning members 114 to avoid separation of the shaft member 115 and the positioning members 114. In addition, the shaft member 115 can be made of a high modulus material, so that the shaft member 115 can have sufficient rigidity and can be bent; the high modulus material can form the shaft member 115 by chemical etching or laser etching, for example, the high modulus material can be a PI material or a glass fiber cloth material, and the elastic modulus of the high modulus material can be greater than 20 MPa.

[0062] The elastic elements 118 abut against the two positioning members 114 and the two abutting blocks 117, respectively, and each of the elastic elements 118 is located between one abutting block 117 and one positioning member 114 adjacent to each other. In this way, the elastic elements 118 can provide a restoring force after the shaft member 115 moves relative to the positioning member 114.

[0063] The elastic assembly 119 is fixed to the shaft member 115 and located between the curved portions 112a of the two support layers 112. The elastic assembly 119 is used to help the display device 100 to return to its original state after being stretched. In some embodiments, the elastic assembly 119 further includes a fixing seat 119a and an elastic body 119b. The fixing seat 119a is fixed to the through portion 116, and the elastic body 119b is fixed to the fixing seat 119a and abuts against the curved portions 112a of the two support layers 112. The aforementioned elastic elements 118 and the elastic body 119b can be made of a gel, a spring, or other materials that can be compressed and then rebound. The gel can be rubber and can have elasticity. The rubber can be styrene-based rubber, olefin-based rubber, diene-based rubber, vinyl chloride-based rubber, urethane-based rubber, ester-based rubber, amide-based rubber, organic fluorine-based rubber, silicone-based rubber, or ethylene-based rubber, such as styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene / butylene-styrene block copolymer (SEBS), styrene-ethylene / propylene-styrene block copolymer (SEPS), thermoplastic polyolefin rubber (TPO), thermoplastic vulcanized rubber (TPV), trans-polybutadiene (TPB), trans-polyisoprene (TPI), thermoplastic polyvinyl chloride (TPVC), thermoplastic chlorinated polyethylene (TCPE), thermoplastic polyurethane (TPU), thermoplastic polyester elastomer (TPEE), thermoplastic polyamide elastomer (TPAE), or thermoplastic fluororubber (TPF), etc.

[0064] In addition, the two support layers 112 can have a filling layer 130 therebetween. The filling layer 130 can fill the space between the two support layers 112 where the stretchable and bendable assembly 113 is not provided, so as to ensure that the appropriate distance is maintained between the support layers 112.

[0065] The light emitting assembly 120 is disposed between the two support layers 112. Each of the light emitting assembly 120 includes a circuit substrate 121 and at least one light emitting element 122. The light emitting element 122 can be a mini light emitting diode (Mini-LED), a micro light emitting diode (Micro-LED), or other small-sized light emitting diode. In addition, the light emitting element 122 can be a packaged wafer or a bare die.

[0066] The circuit substrate 121 is electrically connected to one of the circuit layers 111. The light emitting element 122 is electrically connected to the circuit substrate 121 and is located on the side of the circuit substrate 121 away from the circuit layer 111. In this way, the light emitting element 122 is located on the opposite sides of the display device 100, so that the display device 100 can achieve the effect of double-sided display and further increase the display area of the display device 100. In addition, the two circuit layers 111 can be electrically independent, so as to independently drive the light emitting elements 122 on the two sides to produce different display modes, thereby increasing the application field of the display device 100.

[0067] In some embodiments, the circuit substrate 121 has a first side 121a and a second side 121b opposite the first side 121a, the circuit substrate 121 includes a conductive layer 123 extending from the first side 121a to the second side 121b, and the circuit substrate 121 is electrically connected to the circuit layer 111 and the light emitting element 122 through the conductive layer 123, wherein the conductive layer 123 can be electrically connected to the light emitting element 122 by conductive glue.

[0068] In some embodiments, each of the light emitting assemblies 120 further includes a circuit element 124 embedded in the circuit substrate 121, and the circuit element 124 is electrically connected to the circuit layer 111 and the light emitting element 122, wherein the circuit element 124 can be an integrated circuit (IC). The circuit element 124 can be electrically connected to the conductive layer 123 by conductive glue or tin, so that the current signal of the circuit element 124 can be transmitted to the light emitting element 122, thereby achieving control of the light emitting element 122. In addition, by embedding the circuit element 124, the overall size of the display device 100 can be reduced, thereby improving the assembly freedom of the display device 100.

[0069] The circuit layer 111 and the conductive layer 123 can have a gold layer 123a between them and other elements. Part of the conductive layer 123 is not electrically connected to the light emitting element 122 and the circuit element 124, and the circuit substrate 121 can further have a protective layer 123b covering the part of the conductive layer 123, and the protective layer 123b and the part of the conductive layer 123 are fixed by a glue layer to achieve the effects of protection and insulation.

[0070] In some embodiments, the display devices 100 can be repeatedly arranged and connected to each other to form a complete display device, and each adjacent light-emitting component 120 can be provided with a bending portion 112a and a telescopic bending component 113. Therefore, the display device can have multiple bending portions 112a and telescopic bending components 113, so that the light-emitting components 120 can be bent or stretched arbitrarily, thereby improving the degree of freedom of operation.

[0071] It must be noted that, through the above structural design, the display device 100 of this application has a hole-free structure, that is, the display device 100 may not contain any conductive through holes or conductive blind holes, thus improving product reliability, saving manufacturing costs, and increasing the degree of freedom in application and in stretching and bending.

[0072] The following will describe in detail the operation of the display device 100 when it is bent or stretched.

[0073] When the display device 100 is neither bent nor stretched, it is in its initial state. When the display device 100 in its initial state is bent into a bent state, the elastic component 119 is compressed by the two support layers 112 and contracts, and the shaft 115 also bends as a result. When the display device 100 in the bent state returns to its initial state, the elastic component 119 extends and pushes the bent portion 112a, causing the bent portion 112a to return to its original shape, indirectly causing the display device 100 to return to a straight position.

[0074] When the display device 100 in the initial state is stretched to the stretched state, the positioning member 114 moves relative to the shaft member 115 and compresses the two elastic elements 118, and the elastic component 119 is also compressed due to the stretching of the bent portion 112a. When the display device 100 in the stretched state returns to the initial state, the two elastic elements 118 extend and drive the positioning member 114 to reset, so that the bent portion 112a returns to its original shape, indirectly causing the light-emitting component 120 to return to its original arrangement density.

[0075] Please refer to Figures 2A-2L , Figures 2A-2L These are cross-sectional schematic diagrams illustrating various process stages of a method for manufacturing a display device according to some embodiments of this application. First, two support layers 112 are provided ( Figures 2A-2G (Taking only one support layer 112 as an example), each of the support layers 112 is connected to the circuit layer 111. More specifically, as... Figure 2A and Figure 2BAs shown, the surface of the support layer 112 can first be formed with a layer of circuit material 140, and then unwanted portions are removed by etching to form the circuit layer 111. Other details of the support layer 112 and the circuit layer 111 have been described in the foregoing paragraphs, and will not be repeated here.

[0076] Next, as shown in Figure 2C , the support layer 112 can first be subjected to selective deep etching to form two accommodation portions 112c for positioning and accommodating other components. As shown in Figure 2D , two first positioning components 114a are attached to one of the two support layers 112, and two second positioning components (not shown in this figure) are attached to the other of the two support layers 112.

[0077] As shown in Figure 2E , the two support layers 112 are bent so that each of the support layers 112 forms a curved portion 112a. In some embodiments, each of the support layers 112 has two or more (including two) flat portions 112b located on both sides of the curved portion 112a, and the circuit layer 111 is disposed on the flat portions 112b.

[0078] Please refer to Figures 3A-3D , Figures 3A-3D , which are cross-sectional schematic diagrams of the steps of forming the shaft assembly 150 at various stages of the process according to some embodiments of the present application. Next, the shaft assembly 150 is provided, which includes a penetrating portion 116, two abutting blocks 117, and an elastic assembly 119. The two abutting blocks 117 are connected to the two ends of the penetrating portion 116, and the elastic assembly 119 is fixed to the penetrating portion 116.

[0079] As shown in Figures 3A-3B , the steps of forming the shaft assembly 150 include providing a high modulus material M, then double-sided deep etching the high modulus material M to form the penetrating portion 116 and the two abutting blocks 117, and further fixing the elastic assembly 119 to the penetrating portion 116. As shown in Figures 3C-3D , in some embodiments, the elastic assembly 119 further includes a fixed seat 119a and an elastic body 119b, the fixed seat 119a is fixed to the penetrating portion 116, and the elastic body 119b is fixed to the fixed seat 119a to form the shaft assembly 150.

[0080] Next, as shown in Figure 2F and Figure 2GAs shown, the shaft assembly 150 is placed on one of the support layers 112, with the elastic component 119 abutting against the bent portion 112a of the support layer 112. Two elastic elements 118 are then respectively disposed between the two abutments 117 and the two first positioning components 114a. The abutments 117 of the shaft assembly 150 and the elastic elements 118 can be disposed in the receiving portions 112c of the two support layers 112 to fix the positions of the shaft assembly 150 and the elastic elements 118.

[0081] Next, as Figure 2H As shown, the other support layer 112 is pressed onto the aforementioned support layer 112, so that the shaft assembly 150 is located between the two support layers 112, and the elastic component 119 abuts against the bent portion 112a of the other support layer 112, that is, the elastic body 119b of the elastic component 119 can abut against the bent portion 112a of the two support layers 112. The two support layers 112 are located between the two circuit layers 111, and the through portion 116 is located between the two first positioning members 114a and the two second positioning members 114b. Furthermore, each of the elastic elements 118 is located between an adjacent first positioning member 114a and a stop block 117, and between an adjacent second positioning member 114b and the aforementioned stop block 117.

[0082] Next, as Figures 2I-2L As shown, multiple light-emitting components 120 are electrically connected to the two circuit layers 111 to obtain a display device 100, wherein the bent portion 112a is located between two adjacent light-emitting components 120.

[0083] For details, please refer to Figures 4A-4F , Figures 4A-4F These are cross-sectional schematic diagrams illustrating the steps of forming the light-emitting component 120 at various process stages according to some embodiments of this application. Figure 4A As shown, in some embodiments, the step of forming the light-emitting component 120 includes providing an insulating layer 125 having a first surface 125a and a second surface 125b opposite to the first surface 125a.

[0084] Next, as Figures 4B-4E As shown, a conductive layer 123 is formed on the first surface 125a, and an adhesive layer 126 is formed on the second surface 125b, wherein, as Figure 4B As shown, the conductive layer 123 can be etched to remove unwanted portions, and as... Figures 4C-4D As shown, a protective layer 123b, a gold layer 123a, and an adhesive layer are covered at different locations on the conductive layer 123 before subsequent steps are performed.

[0085] Next, as shown in Figure 4F , the insulating layer 125 is folded to bend the insulating layer 125 and the conductive layer 123, and the adhesive layer 126 is at least partially sandwiched by the insulating layer 125, to form the circuit substrate 121. The light emitting component 120 formed in this way has a non-porous structure, so that the reliability of the component can be improved, and the manufacturing cost can be reduced by eliminating the process of through-hole plating.

[0086] As shown in Figure 2I and Figure 2J , each of the light emitting components 120 further comprises a circuit element 124, and the step of connecting the light emitting components 120 comprises bonding the circuit element 124 to the circuit layer 111, and forming a connecting layer 111a on the circuit layer 111. Next, as shown in Figure 2K , the circuit substrate 121 is attached to the circuit layer 111, so that the circuit element 124 is embedded in the circuit substrate 121, and the connecting layer 111a helps the circuit substrate 121 to be bonded to the circuit layer 111.

[0087] Next, as shown in Figure 2L , the light emitting element 122 is bonded to the circuit substrate 121, so that the light emitting element 122 is electrically connected to the circuit substrate 121, that is, the circuit element 124 is electrically connected to the circuit layer 111 and the light emitting element 122, and the light emitting element 122 and the circuit substrate 121 can also have a bonding layer 160 to help bonding.

[0088] In summary, the display device of the present application uses a stretchable and foldable component, has a non-porous structure and stretchable and foldable properties, can improve the freedom and reliability of the display device, and can reduce the manufacturing cost and simplify the manufacturing steps of the display device. Furthermore, the display device of the present application has a display area further increased by arranging the light emitting components on both sides.

[0089] Although the present application has been disclosed with the above embodiments, it is not intended to limit the present application, and those skilled in the art can make various modifications and improvements without departing from the spirit and scope of the present application, and therefore the scope of protection of the present application shall be defined by the appended claims.

Claims

1. A display device, characterized by comprising: A display device comprises: a flexible circuit substrate comprising: two circuit layers; two support layers located between the two circuit layers and opposite to each other, wherein each of the support layers has a bending portion protruding in a direction away from each other to form a receiving space between the two support layers; and a telescopic bending assembly located in the receiving space and comprising: two positioning members fixed between the two support layers, wherein the bending portion is located between the two positioning members; a shaft member comprising: a penetrating portion penetrating through the two positioning members; and two abutting blocks connected to two ends of the penetrating portion and clamped between the two support layers, wherein the two positioning members are located between the two abutting blocks; two elastic members abutting the two positioning members and the two abutting blocks, respectively, wherein each of the elastic members is located between one of the abutting blocks and one of the positioning members adjacent to each other; and an elastic assembly fixed on the shaft member and located between the bending portions of the two support layers; and a plurality of light emitting assemblies arranged on the two support layers, wherein each of the light emitting assemblies comprises: a circuit substrate electrically connected to one of the circuit layers; and at least one light emitting element electrically connected to the circuit substrate and located on a side of the circuit substrate away from the one of the circuit layers; wherein, when the display device in an initial state is bent to a bent state, the elastic assembly is compressed by the two support layers and shrinks; when the display device in the bent state returns to the initial state, the elastic assembly is stretched and pushes the bending portions; when the display device in the initial state is stretched to a stretched state, the positioning members move relative to the shaft member and compress the two elastic members; when the display device in the stretched state returns to the initial state, the two elastic members are stretched and drive the positioning members to reset.

2. The display device of claim 1, wherein Each of the support layers has at least two flat portions located on two sides of the bending portion, wherein the bending portion is located between two adjacent light emitting assemblies, and the circuit layer is arranged on the flat portion.

3. The display device of claim 1, wherein The elastic assembly further comprises: a fixing seat fixed on the penetrating portion; and an elastic body fixed on the fixing seat and abutting the bending portions of the two support layers.

4. The display device of claim 1, wherein The circuit substrate has a first side and a second side opposite to the first side, the circuit substrate comprises a conductive layer extending from the first side to the second side, and the circuit substrate is electrically connected to the circuit layer and the light emitting element through the conductive layer.

5. The display device of claim 1, wherein Each of the light emitting assemblies further comprises a circuit element embedded in the circuit substrate, and the circuit element is electrically connected to the circuit layer and the light emitting element.

6. A method for manufacturing a display device, comprising: A display device comprises: providing two support layers, each of the support layers being connected with a circuit layer; attaching two first positioning members to one of the two support layers; attaching two second positioning members to the other of the two support layers; bending the two support layers so that each of the support layers forms a bending portion; A shaft assembly is provided, comprising a through portion, two blocks and an elastic component, the two blocks are connected to two ends of the through portion, and the elastic component is fixed on the through portion; The shaft assembly is placed on one of the support layers, so that the elastic component abuts against the curved portion of the one of the support layers; Two elastic elements are respectively arranged between the two blocks and the two first positioning components; The other support layer is pressed to the one of the support layers, so that the shaft assembly is located between the two support layers, and the elastic component abuts against the curved portion of the other support layer, wherein the two support layers are located between two circuit layers, and the through portion is located between the two first positioning components and the two second positioning components; and A plurality of light emitting assemblies are electrically connected to the two circuit layers to obtain a display device.

7. The method for manufacturing a display device according to claim 6, wherein Each of the support layers has at least two flat portions located on both sides of the curved portion, and the circuit layer is arranged on the flat portions, so that the curved portion is located between two adjacent light emitting assemblies.

8. The method for manufacturing a display device according to claim 6, wherein The elastic component further comprises: a fixing seat fixed on the through portion; and an elastic body fixed on the fixing seat and abutting against the curved portion of the two support layers.

9. The method for manufacturing a display device according to claim 6, wherein The step of forming the light emitting assembly comprises: providing an insulating layer having a first surface and a second surface opposite to the first surface; forming a conductive layer on the first surface; forming an adhesive layer on the second surface; and folding the insulating layer, so that the insulating layer and the conductive layer are bent, and the adhesive layer is at least partially sandwiched by the insulating layer, to form a circuit substrate.

10. The method for manufacturing a display device according to claim 9, wherein Each of the light emitting assemblies further comprises a circuit element embedded in the circuit substrate, and the circuit element is electrically connected to the circuit layer and a light emitting element.

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