Flexible display device, telescopic circuit board and manufacturing method thereof

Abstract

A telescopic circuit board comprises a flexible circuit substrate and two telescopic assemblies. The flexible circuit substrate comprises a bending part and two adjusting parts, the two adjusting parts are located at the two ends of the bending part respectively, and two sliding grooves are formed between the bending part and the two adjusting parts respectively. The two telescopic assemblies are arranged in the two sliding grooves respectively, and each telescopic assembly comprises a fixing piece, a fixing end and an elastic piece. The fixing piece is fixed to one of the adjusting parts and located in one of the two sliding grooves. And the fixed end is positioned in the first bent part of one of the adjusting parts. The elastic piece is fixed on the fixing piece and located between the fixing end and the fixing piece. When the bending part is stretched or bent, the telescopic assemblies drive the two adjusting parts, so that the fixing piece of each of the two telescopic assemblies moves in the direction away from the bending part along the corresponding one of the two sliding grooves, and the elastic piece is compressed. Therefore, the matching degree of the telescopic circuit board and other electronic devices can be improved, and the condition that the telescopic circuit board is wrinkled is reduced or avoided.

Description

Technical Field

[0001] The present application relates to a display device, a retractable circuit board and a manufacturing method thereof, and more particularly to a flexible and retractable display device, a retractable circuit board and a manufacturing method thereof. Background Art

[0002] With the booming development of the technology industry, flexible printed circuit boards (FPC) have become an indispensable component in electronic devices such as smartphones, laptops, tablet devices, and smart watches. However, flexible printed circuit boards lack sufficient elasticity. When flexible printed circuit boards are combined with other electronic devices to achieve folding or bending, it is often necessary to reserve length and space at the folding or bending point, which is not only not conducive to the internal space configuration of the electronic device, but also reduces the assembly freedom of the flexible printed circuit board. Summary of the invention

[0003] Therefore, the present application provides a retractable circuit board, which includes: a flexible circuit substrate and two retractable components. The flexible circuit substrate includes: a flexure and two adjustment parts, wherein the two adjustment parts are respectively located at the two ends of the flexure, and two slide grooves are respectively formed between the flexure and the two adjustment parts. The two retractable components are respectively arranged in the two slide grooves, wherein each of the two retractable components includes a fixing member, a fixing end and an elastic member. The fixing member is fixed to one of the adjustment parts and is located in one of the two slide grooves. The fixed end is located in the first bend of one of the adjustment parts. The elastic member is fixed to the fixing member and is located between the fixing end and the fixing member. When the flexure is stretched or bent, the two retractable components drive the two adjustment parts so that the fixing member of each of the two retractable components moves along the corresponding one of the two slide grooves toward a direction away from the flexure, and compresses the elastic member.

[0004] According to the retractable circuit board of the present application, each of the two retractable components further includes a support member, and the support member is disposed around the bottom of one of the two slide grooves.

[0005] According to the retractable circuit board of the present application, the flexible circuit substrate further includes: a first conductor layer and a second conductor layer, wherein the first conductor layer is disposed on the lower surface of the flexure portion, and the second conductor layer is disposed on a portion of the surface of the second bend of the two adjustment portions.

[0006] The retractable circuit board according to the present application further includes a plurality of circuit elements, wherein the plurality of circuit elements are disposed on the second conductor layer.

[0007] According to the retractable circuit board of the present application, each of the two retractable components further includes a first sliding sheet, and the first sliding sheet is fixed above the top surface of the fixing member, and the area of ​​the first sliding sheet is larger than the top surface area of ​​the fixing member.

[0008] According to the retractable circuit board of the present application, each of the retractable components further includes a second sliding piece, and the second sliding piece is disposed around one of the two sliding grooves.

[0009] The present application provides a flexible display device, which includes: a hinge structure, a flexible circuit substrate and two telescopic components. The flexible circuit substrate includes: a flexure and two adjustment parts, wherein the flexure and the two adjustment parts form a receiving space, and two slide grooves are formed between the flexure and the two adjustment parts. The two telescopic components are respectively arranged in the two slide grooves, wherein each of the two telescopic components includes: a fixing part, a fixing end and an elastic part. The fixing member is fixed on one of the two adjusting parts and is located in one of the two sliding grooves; the fixing end is located in the first bending part of one of the two adjusting parts; the elastic member is fixed on the fixing member and is located between the fixing end and the fixing member; wherein the hinge structure is attached to part of the lower surface of the two adjusting parts so that the hinge structure can be straightened or bent along with the two adjusting parts; when the flexible display device is bent, the two telescopic components drive the two adjusting parts so that the fixing member of each of the two telescopic components moves along the corresponding one of the two sliding grooves in a direction away from the bending part and compresses the elastic member, and wherein the hinge structure and the two adjusting parts are bent synchronously so that the hinge structure is accommodated in the accommodating space.

[0010] According to the flexible display device of the present application, the flexible circuit substrate further includes: a first conductor layer and a second conductor layer. The first conductor layer is disposed on the lower surface of the flexure. The second conductor layer is disposed on a portion of the surface of the second bend of the two adjustment parts, and the second conductor layer includes a plurality of circuit elements.

[0011] According to the flexible display device of the present application, each of the two telescopic components further includes: a first slide and a second slide. The first slide is fixed above the top surface of the fixing member, and the area of ​​the first slide is larger than the top surface area of ​​the fixing member. The second slide is arranged around one of the two slide grooves.

[0012] The present application provides a manufacturing method of a retractable circuit board, comprising: providing a flexible substrate, wherein two fixing members and a circuit layer are formed on the flexible substrate; performing a first bending step on two ends of the flexible substrate to form two first bends at the two ends respectively; after forming the two first bends, forming two slide grooves on the flexible substrate, so that the flexure and two ends of the flexible substrate are respectively separated by the two slide grooves; fixing two elastic members on the two fixing members respectively; fixing two fixed ends on the two elastic members respectively; performing a second bending step on the two ends of the flexible substrate, bending the two ends toward the flexure, so that the two fixing members are respectively inserted into the two slide grooves, so that two first bends and two second bends are formed; and attaching two slides to the periphery of the top surfaces of the two slide grooves.

[0013] The method according to the present application further includes: bonding a plurality of circuit elements to the surfaces of the two first bends at the two end portions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the above features, advantages and embodiments of the present application more understandable, the attached drawings are described as follows:

[0015] Figure 1A and Figure 1B A top view of a retractable circuit board according to some embodiments of the present application and a Figure 1A A cross-sectional view of the retractable circuit board obtained along the line AA' shown in FIG.

[0016] Figure 2 is a schematic diagram of a retractable circuit board in a stretched state according to some embodiments of the present application;

[0017] Figure 3 is a schematic diagram of a flexible display device according to some embodiments of the present application;

[0018] FIG. 4A to FIG. 4C A schematic diagram of a flexible display device in a bent state and side views of its left and right sides according to some embodiments of the present application;

[0019] Figure 5 A flowchart of a method for manufacturing a retractable circuit board according to some embodiments of the present application; and

[0020] 6A to 6H Draw the Figure 5 Cross-sectional views of a stretchable circuit board manufactured by the manufacturing method at various manufacturing stages. DETAILED DESCRIPTION

[0021] The following application provides many different embodiments or examples for realizing different features of the provided subject matter. Specific examples of components and configurations are described below to simplify the present application. Of course, the examples are merely examples and are not intended to be limiting. For example, in the following description, a first feature is formed on or above a second feature, which may include an embodiment in which the first feature and the second feature are directly in contact with each other, and may also include an embodiment in which an additional feature can be formed between the first feature and the second feature so that the first feature and the second feature are not in direct contact with each other. In addition, the present application may repeat reference numbers and / or text in various examples. This repetition is for the purpose of simplicity and clarity and does not itself limit the relationship between the various embodiments and / or components discussed.

[0022] Please refer to Figure 1A and Figure 1B , Figure 1A and Figure 1BThe top view of the retractable circuit board 100 and the Figure 1A The cross-sectional view of the retractable circuit board 100 is obtained by taking the line AA' shown in FIG. Figure 1B As shown, the retractable circuit board 100 includes a flexible circuit substrate 110 and two retractable components 120, wherein the flexible circuit substrate 110 can be bent, and the two retractable components 120 are arranged on the flexible circuit substrate 110 and can drive the flexible circuit substrate 110 to stretch to the left and right respectively, thereby realizing the retractability and bendability of the retractable circuit board 100.

[0023] The flexible circuit substrate 110 includes a flexure 111, two adjustment portions 112, and at least two circuit layers 113. Two slide grooves 114 are formed between the flexure 111 and the two adjustment portions 112, and the two slide grooves 114 provide a margin for the two adjustment portions 112 to move laterally. The two adjustment portions 112 are located at the two ends of the flexure 111, and are a structure with two layers of bending (such as Figure 1B The first layer bend 112a and the second layer bend 112b are shown, and the second layer bend 112b of the two adjustment parts 112 can be fixed and bonded by the adhesive layer 115.

[0024] These circuit layers 113 are respectively arranged on the lower surface of the flexible portion 111 and the partial surface of the second layer bend 112b of the two adjustment portions 112 to form a wiring network that provides current flow and realizes electrical connection between circuit elements 116 (for example, connectors, capacitors, inductors, transistors, resistors and diodes, etc.), wherein the circuit elements 116 can be arranged on the circuit layer 113 on the partial surface of the second layer bend 112b.

[0025] In some embodiments, the two adjustment parts 112 may have more layers of bends, and the layers may be bonded by the adhesive layer 115, but the present application is not limited thereto. In some embodiments, the flexible circuit substrate 110 may be a single-sided circuit board, a double-sided circuit board, or a multi-layer circuit board, but the present application is not limited thereto. In some embodiments, the flexure 111 is designed as a flexible single-sided circuit board, which is beneficial to increase the number of dynamic bends of the retractable circuit board 100.

[0026] In the following, since the two telescopic components 120 are respectively disposed in the two slide grooves 114, and the two may have similar or identical structures, only one set of the structures of the two telescopic components 120 will be described in detail herein, and the other set of the two telescopic components 120 will not be described in detail. In the embodiment of the present application, the telescopic component 120 includes a fixing member 121, a fixing end 122, and an elastic member 123.

[0027] The fixing member 121 is fixed on the adjusting portion 112 and is located in the slide groove 114. The fixing end 122 is located in the first bend 112a of the adjusting portion 112, wherein the fixing end 122 can be a metal or non-metal pulley, or a stopper, and the present application is not limited thereto. The elastic member 123 is fixed on the fixing member 121 and is located between the fixing end 122 and the fixing member 121, wherein the elastic member 123 can be stretched or compressed, and is, for example, a spring or elastic rubber, and the present application is not limited thereto. Specifically, the fixing member 121 can drive the adjusting portion 112 to move in the slide groove 114, and when the fixing member 121 moves toward the fixing end 122, the elastic member 123 will be compressed by the fixing member 121 and the fixing end 122, so that the fixing member 121 can move laterally (for example, horizontally) in the slide groove 114.

[0028] In some embodiments, the telescopic assembly 120 further includes a plurality of slides, for example Figure 1B The first slide 124a and the second slide 124b are shown in the figure. The first slide 124a is fixed above the top surface of the fixing member 121, wherein the area of ​​the first slide 124a is larger than the top surface area of ​​the fixing member 121, and the first slide 124a does not exceed the outer edge of the second slide 124b. In this way, the second slide 124b and the slide groove 114 can limit the sliding of the retractable circuit board 100 and prevent the first slide 124a from falling off the upper side of the fixing member 121. The second slide 124b is arranged around the upper side of the slide groove 114 and can serve as a track for the first slide 124a to slide, so that when the retractable circuit board 100 is extended or bent, the first slide 124a can slide on the second slide 124b.

[0029] In some embodiments, the first slide 124a and the second slide 124b further include a glue layer, and the first slide 124a and the second slide 124b can be respectively bonded to the fixing member 121 and around the slide slot 114, wherein the second slide 124b can cover a portion of the flexible circuit substrate 110 and the adjustment portion 112. In some embodiments, the telescopic assembly 120 further includes a support member 125, which is disposed around the bottom of the slide slot 114, wherein the shape of the support member 125 can be similar or the same as the shape of the second slide 124b, and the support member 125 can overlap the second slide 124b. The support member 125 can strengthen the support around the slide slot 114 to prevent the retractable circuit board 100 from being torn or damaged when stretched or bent.

[0030] Please refer to Figure 2 , Figure 2Schematic diagram of a retractable circuit board 100 in a stretched state according to some embodiments of the present application. When the flexible circuit substrate 110 is stretched, the retractable component 120 drives the adjustment portion 112 to move along the slide groove 114 in a direction away from the flexure 111 through the fixing member 121, so that the elastic member 123 is compressed by the fixing end 122 and the fixing member 121, thereby generating a stretching length L between the fixing member 121 and the flexure 111. Based on the change of the stretching length L of the adjustment portion 112 at both ends, not only the application flexibility of the retractable circuit board 100 is improved, but also the assembly freedom of the retractable circuit board 100 and other devices is improved.

[0031] Please refer to Figure 3 , Figure 3 Schematic diagram of a flexible display device 200 according to some embodiments of the present application. The flexible display device 200 includes a flexible circuit substrate 210, two telescopic components 220 and a hinge structure 230. The flexible circuit substrate 210 can be flattened or bent along with the operation of the hinge structure 230. The two telescopic components 220 provide the flexible circuit substrate 210 with a stretch margin at both ends, so that the assembly adaptability of the flexible circuit substrate 210 and the hinge structure 230 is improved, so that the flexible circuit substrate 210 can be close to the hinge structure 230, reducing or avoiding the occurrence of wrinkles on the flexible circuit substrate 210. In addition, the flexible circuit substrate 210 and the two telescopic components 220 can be similar to or the same as the flexible circuit substrate 110 and the two telescopic components 120 of the retractable circuit board 100, so the relevant details will not be repeated below.

[0032] Similar to or identical to the flexible circuit substrate 110 of the retractable circuit board 100, the flexible circuit substrate 210 includes a flexure 211, two adjustment portions 212, and at least two circuit layers 213, wherein the flexure 211 and the two adjustment portions 212 form a receiving space S. The two ends of the flexure 211 and the two adjustment portions 212 are separated by two slide grooves 214, respectively, and the slide grooves 214 provide a margin for the two adjustment portions 212 to move laterally.

[0033] The two adjustment parts 212 have a first layer of bends 212a and a second layer of bends 212b, respectively, and the second layer of bends 212b of the adjustment parts 212 can be fixed by bonding with a glue layer 215. These two circuit layers 213 are respectively arranged on the lower surface of the flexure 211 and a part of the surface of the second layer of bends 212b of the two adjustment parts 212, and can realize the electrical connection between the circuit elements 216. The circuit element 216 is arranged on the circuit layer 213 on a part of the surface of the second layer of bends 212b. In some embodiments, the two adjustment parts 212 can have more layers of bends, and the layers can be bonded by a glue layer 215. In addition, in some embodiments, the flexure 211 is designed as a flexible single-sided circuit board, which is conducive to increasing the number of dynamic bending times of the flexible display device 200.

[0034] Similar to or identical to the telescopic assembly 120 of the telescopic circuit board 100, each of the telescopic assembly 220 includes a fixing member 221, a fixing end 222, and an elastic member 223. The fixing member 221 is fixed to the adjusting portion 212 and is located in the slide groove 214. The fixing end 222 is located in the first layer bend 212a of the adjusting portion 212, wherein the fixing end 222 can be a metal or non-metal pulley, or a stopper, and the present application is not limited thereto. The elastic member 223 is fixed to the fixing member 221 and is located between the fixing end 222 and the fixing member 221, wherein the elastic member 223 can be stretched or compressed, and is, for example, a spring or elastic rubber, etc., and the present application is not limited thereto.

[0035] In some embodiments, the telescopic assembly 220 further includes a first slide 224a and a second slide 224b. The first slide 224a is fixed above the top surface of the fixing member 221, wherein the area of ​​the first slide 224a is larger than the top surface area of ​​the fixing member 221, and the first slide 224a does not exceed the outer edge of the second slide 224b, so that the sliding of the flexible display device 200 can be limited and the first slide 224a can be prevented from falling off from the upper side of the fixing member 221.

[0036] The second slide sheet 224b is disposed around the upper side of the slide groove 214 and can serve as a track for the first slide sheet 224a to slide. In this way, when the flexible display device 200 is extended or bent, the first slide sheet 224a can slide on the second slide sheet 224b. In some embodiments, the first slide sheet 224a and the second slide sheet 224b further include a glue layer for bonding the first slide sheet 224a and the second slide sheet 224b to the fixing member 221 and around the slide groove 214, respectively.

[0037] In some embodiments, the telescopic component 220 further includes a support member 225, which is arranged around the bottom of the slide groove 214 to strengthen the support around the slide groove 214 to prevent the flexible display device 200 from being torn or damaged when stretched or bent, wherein the shape of the support member 225 can be similar to or the same as the shape of the second slide sheet 224b, and the support member 225 can overlap vertically with the second slide sheet 224b.

[0038] Please refer to FIG. 4A to FIG. 4C , FIG. 4A to FIG. 4CThe diagram is a schematic diagram of a flexible display device 200 in a bent state and side views of the left and right sides thereof according to some embodiments of the present application. When the flexible display device 200 is bent, the telescopic component 220 drives the adjusting portion 212 to move along the slide groove 214 in a direction away from the flexure portion 211 through the fixing member 221, so that the elastic member 223 is compressed by the fixing end 222 and the fixing member 221, thereby generating a stretching length L between the fixing member 221 and the flexure portion 211, and the hinge structure 230 and the two adjusting portions 212 move synchronously, so that the hinge structure 230 is accommodated in the accommodation space S. Based on the change of the stretching length L of the adjusting portions 212 at both ends, not only the application flexibility of the flexible display device 200 is improved, but also the assembly freedom of the flexible display device 200 and the hinge structure 230 is improved.

[0039] Please refer to Figure 5 , Figure 5 FIG. 3 is a flow chart of a method 300 for manufacturing a retractable circuit board according to some embodiments of the present application. The manufacturing method 300 may include: Figure 1B The retractable circuit board 100 shown, Figure 3 The flexible display device 200 shown in the figure can be implemented by related components, or can be implemented by a similar architecture that can achieve similar functions. Figure 5 The manufacturing method 300 combines Figure 1B The retractable circuit board 100 and 6A to 6H To illustrate, 6A to 6H Draw the Figure 5 Cross-sectional views of the stretchable circuit board 100 manufactured by the manufacturing method 300 at various manufacturing stages.

[0040] It should be understood that the manufacturing method 300 is a non-limiting example. Although only some operations are briefly described herein, in fact, Figure 5 Other additional operations may be included before, during or after the manufacturing method 300. In addition, the order of operations provided by the manufacturing method 300 is not intended to be limiting. In fact, some operations may be performed in different orders, and some additional operations may also be appropriately modified.

[0041] The manufacturing method 300 includes steps 301 to 307. Figure 5 and Fig. 6A In step 301, a flexible substrate 110' is first provided, wherein a metal layer 106, such as a copper layer, may be formed on a surface (such as a lower surface) of the flexible substrate 110'. Figure 5 and Figure 6B Then, two fixing members 121 and a circuit layer 113 may be formed on the flexible substrate 110'. Figure 6BIn the illustrated embodiment, the circuit layer 113 can be formed using the metal layer 106. For example, the metal layer 106 can be used as a seed layer for electroplating so that the circuit layer 113 can be formed using a semi-additive method. Alternatively, the circuit layer 113 can also be formed using a subtractive method, that is, the circuit layer 113 can be formed by photolithography and etching the metal layer 106.

[0042] In this embodiment, the manufacturing method 300 may further include forming an insulating layer (not shown) between the flexible substrate 110' and the circuit layer 113, and forming a protective layer 117 covering the circuit layer 113, which can achieve the effects of protection and insulation, wherein the protective layer 117 can be a cover layer. After forming the circuit layer 113, the manufacturing method 300 may further include forming a surface treatment layer 118 on the circuit layer 113, wherein various circuit elements 116 (for example, connectors, capacitors, inductors, transistors, resistors, and diodes, etc.) may be bonded on the surface treatment layer 118 to achieve electrical conduction of the retractable circuit board 100. In some embodiments, the fixing member 121 may be obtained by electroplating or thick copper etching.

[0043] See also Figure 5 and Figure 6C In step 302, the two ends of the flexible substrate 110' are subjected to a first bending step to form two bends, i.e., two second-layer bends 112b, at the two ends. The two ends respectively have two opposite sides of the flexible substrate 110', and the overlapping sections of the second-layer bends 112b can be bonded by an adhesive layer 115. In addition, in the subsequent process, the two ends will form two adjustment parts 112 respectively.

[0044] See also Figure 5 and Fig.6D In step 303, after forming two bends (i.e., the second layer bend 112b), two slide grooves 114 are formed on the flexible substrate 110' by processes such as die punching or laser grooving, so that the flexure 111 and the two ends of the flexible substrate 110' are separated by the two slide grooves 114. In some embodiments, the flexure 111 is designed as a flexible single-sided circuit board, which is conducive to increasing the number of dynamic bending times of the retractable circuit board 100.

[0045] See also Figure 5 and Fig. 6E In step 304, two elastic members 123 are fixed to two fixing members 121 respectively. The elastic member 123 can be stretched or compressed, and is, for example, a spring or elastic rubber, etc., but the present application is not limited thereto. In addition, the manufacturing method 300 may further include setting a support member 125 around the bottom of the slide groove 114. The support member 125 can strengthen the support around the slide groove 114 to prevent the retractable circuit board 100 from being torn or damaged when stretched or bent.

[0046] See also Figure 5 and Fig. 6F In step 305, the two fixed ends 122 are respectively fixed to the two elastic members 123. The fixed ends 122 can be metal or non-metal pulleys, or stoppers, and the present application is not limited thereto.

[0047] See also Figure 5 and Figure 6G In step 306, the two ends of the flexible substrate 110' are subjected to a second bending step, and the two ends are bent toward the direction of the flexure 111, so that the two fixing members 121 are respectively inserted into the two slide grooves 114, so as to form an adjustment portion 112 having a first layer of bending 112a and a second layer of bending 112b, and a flexible circuit substrate 110 including a flexure 111, two adjustment portions 112 and at least two circuit layers 113. In some embodiments, the two ends may have more layers of bending, and the layers may be bonded by an adhesive layer 115, but the present application is not limited thereto.

[0048] See also Figure 5 and Figure 6H In step 307, two slides, namely the second slides 124b, are attached to the top surfaces of the two slide grooves 114. Figure 1B ) is basically completed. In some embodiments, the manufacturing method 300 further includes fixing two slides, namely the first slide 124a, on the top surface of the fixing member 121. In some embodiments, the manufacturing method 300 further includes bonding a plurality of circuit elements 116 to the circuit layer 113 on the surface of the two second layer bends 112b of the two adjustment portions 112.

[0049] In the embodiment of the present application, the second slide 124b is disposed around the upper side of the slide groove 114 and can serve as a track for the first slide 124a to slide, so that when the retractable circuit board 100 is extended or bent, the first slide 124a can slide on the second slide 124b. In the embodiment of the present application, the area of ​​the first slide 124a is larger than the top surface area of ​​the fixing member 121, and the first slide 124a does not exceed the outer edge of the second slide 124b, so that the second slide 124b and the slide groove 114 can limit the sliding of the retractable circuit board 100 and prevent the first slide 224a from falling off from the upper side of the fixing member 121.

[0050] The present application provides a flexible display device, a retractable circuit board, and a method for manufacturing a retractable circuit board. By setting a retractable component and a slide groove to provide a margin for lateral movement of the flexible circuit board, the flexible circuit board has space for retraction and bending, which solves the problem that when the existing flexible circuit board is combined with a hinge structure or applied to an electronic device, it is necessary to reserve length and space at the folding or bending part so that it can be conformally accommodated inside the electronic device when bent. In summary, the flexible display device, retractable circuit board, and method for manufacturing a retractable circuit board of the present application not only improve the application flexibility of the flexible circuit board, but also improve the assembly freedom of the flexible circuit board.

[0051] Although the present application has been disclosed as above by way of embodiments, it is not intended to limit the present application. Any technician in the technical field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the content defined in the attached claims.

[0052]

Explanation of symbols

[0053] 100: Scalable circuit board

[0054] 106:Metal layer

[0055] 117: Protective layer

[0056] 118: Surface treatment layer

[0057] 200: Flexible display device

[0058] 110,210: Flexible circuit substrate

[0059] 110': Flexible substrate

[0060] 111,211: Flexure

[0061] 112,212: Adjustment Department

[0062] 112a, 212a: first layer bending

[0063] 112b, 212b: Second layer bend

[0064] 113,213: Circuit layer

[0065] 114,214: Chute

[0066] 115,215: Adhesive layer

[0067] 116,216: Circuit components

[0068] 120,220: telescopic components

[0069] 121,221:Fixtures

[0070] 122,222: Fixed end

[0071] 123,223: Elastic parts

[0072] 124a, 224a: first sliding piece

[0073] 124b, 224b: Second sliding piece

[0074] 125,225:Support

[0075] 230: Hinge structure

[0076] 300: Manufacturing method

[0077] 301,302,303,304,305,306,307: Steps

[0078] A-A':line

[0079] L: stretch length

[0080] S: Accommodation space.

Claims

1. A retractable circuit board, characterized in that: Include: Flexible circuit substrates, including: a flexure; and two adjusting portions, respectively located at two ends of the bending portion, wherein two sliding grooves are respectively formed between the bending portion and the two adjusting portions; and Two telescopic components are respectively arranged in the two slide slots, wherein each of the telescopic components comprises: A fixing member, fixed to one of the adjusting parts and located in one of the two slide grooves; a fixed end located in a first bend of one of the adjusting portions; and An elastic member is fixed on the fixing member and is located between the fixing end and the fixing member; wherein, when the flexure portion is stretched or bent, the two telescopic components drive the two adjusting portions so that the fixing member of each of the two telescopic components moves along a corresponding one of the two slide grooves toward a direction away from the flexure portion and compresses the elastic member.

2. The retractable circuit board according to claim 1, characterized in that: Each of the two telescopic components further includes a support member, and the support member is arranged around the lower part of one of the two slide grooves.

3. The retractable circuit board according to claim 1, characterized in that: The flexible circuit substrate further comprises: A first conductor layer, wherein the first conductor layer is disposed on a lower surface of the flexure; and The second conductor layer is disposed on a surface of a second bend of the two adjustment portions.

4. The retractable circuit board according to claim 3, characterized in that: The device also includes a plurality of circuit elements, wherein the plurality of circuit elements are disposed on the second conductor layer.

5. The retractable circuit board according to claim 1, characterized in that: Each of the two telescopic components further includes a first sliding sheet, and the first sliding sheet is fixed above the top surface of the fixing member, and the area of ​​the first sliding sheet is larger than the area of ​​the top surface of the fixing member.

6. The retractable circuit board according to claim 5, characterized in that: Each of the telescopic components further includes a second sliding plate, and the second sliding plate is arranged around one of the two sliding grooves.

7. A flexible display device, characterized in that: Include: Hinge structure; A flexible circuit substrate, comprising a flexure and two adjusting portions, wherein the flexure and the two adjusting portions form a containing space, and two sliding grooves are respectively formed between the flexure and the two adjusting portions; and Two telescopic components are respectively arranged in the two slide slots, wherein each of the two telescopic components comprises: A fixing member, fixed to one of the two adjusting parts and located in one of the two sliding grooves; A fixed end located in a first bend of one of the two adjusting parts; and an elastic member fixed on the fixing member and located between the fixing end and the fixing member; wherein the hinge structure is attached to a part of the lower surface of the two adjusting parts so that the hinge structure can be straightened or bent along with the two adjusting parts; When the flexible display device is bent, the two telescopic components drive the two adjusting parts so that the fixing member of each of the two telescopic components moves along a corresponding one of the two sliding grooves toward a direction away from the bending part and compresses the elastic member, and the hinge structure and the two adjusting parts are bent synchronously so that the hinge structure is accommodated in the accommodating space.

8. The flexible display device according to claim 7, wherein: The flexible circuit substrate further comprises: A first conductor layer, wherein the first conductor layer is disposed on a lower surface of the flexure; and The second conductor layer is disposed on a portion of the surface of the second bend of the two adjustment portions, and the second conductor layer includes a plurality of circuit elements.

9. The flexible display device according to claim 7, wherein: Each of the two telescopic components further comprises: a first sliding sheet, wherein the first sliding sheet is fixed above the top surface of the fixing member, and an area of ​​the first sliding sheet is larger than an area of ​​the top surface of the fixing member; and A second sliding sheet, wherein the second sliding sheet is disposed around one of the two sliding grooves.

10. A method for manufacturing a retractable circuit board, characterized in that: Include: Providing a flexible substrate, wherein two fixing members and a circuit layer are formed on the flexible substrate; Performing a first bending step on the two ends of the flexible substrate to form two first bends at the two ends respectively; After forming the two first bends, forming two slide grooves on the flexible substrate, so that a bending portion and the two end portions of the flexible substrate are respectively separated by the two slide grooves; Fixing the two elastic members on the two fixing members respectively; Fixing the two fixed ends to the two elastic members respectively; Performing a second bending step on the two ends of the flexible substrate to bend the two ends toward the bending portion so that the two fixing members are respectively inserted into the two slide grooves to form the two first bends and the two second bends; and The two slide sheets are attached to the peripheries of the top surfaces of the two slide grooves.

11. The method according to claim 10, characterized in that Also includes: A plurality of circuit elements are bonded to the surfaces of the two first bends at the two end portions.

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