Flexible circuit board, display device and preparation method of flexible circuit board

Abstract

The invention relates to the technical field of display, particularly provides a flexible circuit board, a display device and a preparation method of the flexible circuit board, and aims to solve the problem of how to improve the structural strength of the flexible circuit board so as to improve the production quality of the display device. In order to achieve the purpose, the flexible circuit board comprises a circuit board body, the circuit board body is provided with a first end and a second end opposite to the first end, the circuit board body is provided with a first surface and a second surface opposite to the first surface, and a welding area is arranged at the position, close to the first end, of the first surface; the reinforcing structure is arranged at the first end, the reinforcing structure comprises a first part attached to the first surface and a second part attached to the second surface, the first part and the second part cover the edge of the first end, and an avoiding hole is formed in the first part to expose the welding area; and the connecting piece is arranged in the welding area and is electrically connected with the circuit board body. The structural strength of the flexible circuit board can be improved, so that the production quality of the display device is improved.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and specifically provides a flexible printed circuit board, a display device, and a method for manufacturing a flexible printed circuit board. Background Art

[0002] In a display device, an FPC (Flexible Printed Circuit) is used to connect a display screen to a main board, providing necessary signal and power transmission within a limited space. Specifically, the FPC extends from the front of the display panel, and after being bent, is connected to a PCB (Printed Circuit Board) or other components on the back of the display panel. In practical applications, it is usually necessary to provide a reinforcing plate or other structures at the end of the FPC close to the back of the display panel to meet the requirements of the structural strength of the FPC itself and the welding of the connectors thereon. However, affected by human operation factors and processing error factors, it is still possible that the structural strength of the above-mentioned end region of the FPC is difficult to meet the requirements, thereby reducing the production quality of the display device. Summary of the Invention

[0003] The present application aims to solve the above technical problems, that is, to solve the problem of how to improve the structural strength of the FPC to enhance the production quality of the display device.

[0004] In a first aspect, the present application provides a flexible printed circuit board, which includes:

[0005] A circuit board body having a first end and a second end opposite to the first end, and the circuit board body has a first surface and a second surface opposite to the first surface, and a welding area is provided at a position on the first surface close to the first end;

[0006] A reinforcing structure provided at the first end, the reinforcing structure includes a first portion attached to the first surface and a second portion attached to the second surface, both the first portion and the second portion cover the edge of the first end, and the first portion has an avoidance hole to expose the welding area;

[0007] A connector provided in the welding area and electrically connected to the circuit board body.

[0008] In a technical solution of the above flexible printed circuit board, the edge of the first end includes a first side edge, and a second side edge and a third side edge respectively located on both sides of the first side edge;

[0009] The reinforcing structure further includes a first connecting portion connected between the first portion and the second portion, and the first connecting portion is arranged along the extending direction of the first side edge, so that the reinforcing structure wraps the first side edge.

[0010] In one technical solution of the flexible circuit board described above, the edge of the first end includes a first side edge, and a second side edge and a third side edge respectively located on both sides of the first side edge;

[0011] The first part includes a first sub - part and a second sub - part. There is a gap between the first sub - part and the second sub - part. The reinforcing structure further includes a second connecting part connected between the first sub - part and the second part, and a third connecting part connected between the second sub - part and the second part. The second connecting part is arranged along the extending direction of the second side edge, and the third connecting part is arranged along the extending direction of the third side edge, so that the reinforcing structure wraps the second side edge and the third side edge respectively.

[0012] In one technical solution of the flexible circuit board described above, the edge of the first end includes a first side edge, and a second side edge and a third side edge respectively located on both sides of the first side edge;

[0013] The reinforcing structure further includes a fourth connecting part and a fifth connecting part connected between the first part and the second part. The fourth connecting part is arranged along the extending direction of the second side edge, and the fifth connecting part is arranged along the extending direction of the third side edge, so that the reinforcing structure is tubular and wraps the second side edge and the third side edge respectively.

[0014] In one technical solution of the flexible circuit board described above, an adhesive layer is provided between the reinforcing structure and the circuit board body.

[0015] In one technical solution of the flexible circuit board described above, the reinforcing structure is made of steel material or polyimide material.

[0016] In a second aspect, the present application provides a display device, which includes the flexible circuit board according to any one of the first aspect.

[0017] In a third aspect, the present application provides a method for manufacturing a flexible circuit board, which includes:

[0018] Providing a circuit board body, the circuit board body has a first end and a second end opposite to the first end, and the circuit board body has a first surface and a second surface opposite to the first surface. A welding area is provided at a position on the first surface close to the first end;

[0019] Providing a first plate member, bending the first plate member along a first crease to form a reinforcing structure. The reinforcing structure includes a first connecting part extending along the first crease and a first part and a second part respectively located on both sides of the first connecting part. An avoidance hole is provided on the first part to expose the welding area;

[0020] Fix the reinforcement structure to the first end, such that the first part is in contact with the first surface, the second part is in contact with the second surface, and both the first part and the second part cover the edge of the first end;

[0021] Provide a connecting member and fix the connecting member to the welding area;

[0022] Wherein, the edge of the first end includes a first side edge, and a second side edge and a third side edge respectively located on both sides of the first side edge, and the first connecting portion is arranged along the extending direction of the first side edge, so that the reinforcement structure wraps the first side edge.

[0023] In a fourth aspect, the present application provides a method for manufacturing a flexible circuit board, which includes:

[0024] Provide a circuit board body, the circuit board body has a first end and a second end opposite to the first end, and the circuit board body has a first surface and a second surface opposite to the first surface, and a welding area is arranged at a position on the first surface close to the first end;

[0025] Provide a second plate member, bend both ends of the second plate member along the second crease and the third crease respectively to form a reinforcement structure, the reinforcement structure includes a second connecting portion extending along the second crease, a third connecting portion extending along the third crease, a second part located between the second connecting portion and the third connecting portion, a first sub-part and a second sub-part opposite to the second part, there is a gap between the first sub-part and the second sub-part, and an avoidance hole is provided on the first part formed by the first sub-part and the second sub-part to expose the welding area;

[0026] Fix the reinforcement structure to the first end, such that the first part is in contact with the first surface, the second part is in contact with the second surface, and both the first part and the second part cover the edge of the first end;

[0027] Provide a connecting member and fix the connecting member to the welding area;

[0028] Wherein, the edge of the first end includes a first side edge, and a second side edge and a third side edge respectively located on both sides of the first side edge, the second connecting portion is arranged along the extending direction of the second side edge, and the third connecting portion is arranged along the extending direction of the third side edge, so that the reinforcement structure wraps the second side edge and the third side edge respectively.

[0029] In a fifth aspect, the present application provides a method for manufacturing a flexible circuit board, which includes:

[0030] Provide a circuit board body, the circuit board body having a first end and a second end opposite to the first end, and the circuit board body having a first surface and a second surface opposite to the first surface, a welding area being provided at a position on the first surface close to the first end;

[0031] Provide a circular tube, press the circular tube into a square tube to form a reinforcing structure, the reinforcing structure including a first part and a second part arranged oppositely, and a fourth connecting part and a fifth connecting part respectively connected between the first part and the second part, an avoidance hole being provided on the first part to expose the welding area;

[0032] Fix the reinforcing structure to the first end, such that the first part is attached to the first surface, the second part is attached to the second surface, and both the first part and the second part cover the edge of the first end;

[0033] Provide a connecting piece and fix the connecting piece to the welding area;

[0034] Wherein, the edge of the first end includes a first side edge, and a second side edge and a third side edge respectively located on both sides of the first side edge, the fourth connecting part is arranged along the extending direction of the second side edge, and the fifth connecting part is arranged along the extending direction of the third side edge, so that the reinforcing structure respectively wraps the second side edge and the third side edge.

[0035] In the case of adopting the above technical solution, the reinforcing structure of the present application adopts a method of wrapping the first end of the circuit board body of the flexible circuit board, that is, covering the surrounding area of the welding area through the first part and the second part, and at the same time reserving an avoidance hole on the first part for welding and fixing the connecting piece, so as to realize the connection between the connecting piece and the circuit board body. Compared with the method in the traditional technology where the reinforcing structure is a single-piece reinforcing plate, the reinforcing structure of the present application improves the structural strength of the surrounding area of the welding area due to its "wrapping property" of the first end of the circuit board body, and the edge protection ability of the first end of the circuit board body is improved due to the reinforcing structure, so that not only the welding requirement of the connecting piece can be met, but also the possibility of the flexible circuit board being damaged during the process flow is reduced, thereby being able to improve the production quality of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The following describes the preferred embodiments of the present application in conjunction with the drawings, in the drawings:

[0037] Figure 1 is a top view of a display panel and a flexible circuit board (the flexible circuit board is in an unbent state);

[0038] Figure 2 is an installation schematic diagram of a reinforcing plate on a flexible circuit board in the related art;

[0039] Figure 3 It is a schematic diagram of the overall structure of a flexible circuit board according to an embodiment of the present application;

[0040] Figure 4 It is a schematic diagram of the first end of a flexible circuit board according to an embodiment of the present application

[0041] Figure 5 It is Figure 4 the right view of;

[0042] Figure 6 It is Figure 4 a schematic diagram of another surface;

[0043] Figure 7 It is a schematic diagram of the initial state (when not bent) of the first board;

[0044] Figure 8 It is a schematic diagram of the first end of a flexible circuit board according to another embodiment of the present application;

[0045] Figure 9 It is Figure 8 the sectional view taken along line A-A in;

[0046] Figure 10 It is along Figure 8 the sectional view taken along line B-B in;

[0047] Figure 11 It is a schematic diagram showing the bending process of the second board;

[0048] Figure 12 It is a schematic diagram of the first end of a flexible circuit board according to another embodiment of the present application;

[0049] Figure 13 It is along Figure 12 the sectional view taken along line C-C in;

[0050] Figure 14 It is a schematic diagram of a circular tube and its pressing process.

[0051] In the figure, the reference numerals refer to the following:

[0052] 100, display panel; 110, driving IC; 120, bonding area; 200, flexible circuit board; 210, first end; 220, second end; 230, device area; 240, BTB device; 250, reinforcing plate;

[0053] 1. Circuit board body; 11. First end; 12. Second end; 100. First surface; 110. Device area; 111. First side; 112. Second side; 113. Third side; 120. Soldering area; 200. Second surface; 201. First crease; 202. Second crease; 203. Third crease; 2. Reinforcing structure; 21. First part; 211. First sub - part; 212. Second sub - part; 213. Gap; 210. Avoidance hole; 22. Second part; 23. First connecting part; 24. Second connecting part; 25. Third connecting part; 26. Fourth connecting part; 27. Fifth connecting part; 3. Connecting piece; 4. Adhesive layer. Detailed implementation manners

[0054] The preferred implementation manners of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present application and are not used to limit the protection scope of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0055] It should be noted that in the description of the present application, the terms indicating directions or position relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or position relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the relevant devices or components must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present application. In addition, ordinal numbers such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0056] In addition, it should also be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0057] To facilitate the understanding of the technical solution of the present application, the flexible circuit board and its application scenarios will be briefly introduced first, and some professional terms involved in the present application will be explained.

[0058] BTB device: An electronic component, welded on a flexible circuit board, composed of two anti - parallel semiconductor devices (such as thyristors, diodes or IGBTs, etc.), capable of realizing bidirectional current control. Structurally, it generally shows the form of a male - female socket, and the connection between the display panel and the external power supply is realized through the engagement of the male - female heads.

[0059] SMT: Surface Mount Technology, a process of soldering and fixing BTB devices on flexible printed circuit boards.

[0060] SUS: Stainless steel, commonly used as a reinforcing material for flexible printed circuit boards.

[0061] Refer to Figure 1 , which is a top view of the display panel and the flexible printed circuit board (the state where the flexible printed circuit board is not bent). Among them, a driving IC 110 is provided at the front edge of the display panel 100, and a bonding area 120 is provided on one side of the driving IC 110. The flexible printed circuit board 200 has a first end 210 and a second end 220 opposite to the first end 210. Among them, the second end 220 is soldered and fixed to the bonding area 120 on the front of the display panel 100. A device area 230 is provided at a position near the second end 220 of the flexible printed circuit board 200. Various capacitor devices or contact points including power supply are provided in the device area 230. The device area 230 is responsible for transmitting the signals generated by the driving IC 110 to the flexible printed circuit board 200, and then transmitting them to the PCB on the back of the display panel 100 through the flexible printed circuit board 200. The first end 210 of the flexible printed circuit board 200 is in the shape of a long and narrow "neck", and connectors such as BTB devices 240 are provided at the first end 210. The flexible printed circuit board 200 extends along the front of the display panel 100 from the second end 220, and after being bent, is connected to the PCB or other components on the back of the display panel 100 through the BTB device 240, thereby realizing the transmission of signals and power.

[0062] In the actual processing and assembly process of the display device, the first end 210 of the flexible printed circuit board 200 needs to meet the requirements of wiring and bending, and at the same time, it also needs to meet the soldering requirements of the BTB device 240. Therefore, higher requirements are put forward for its structural strength. In some related technologies in this field, an SUS reinforcing plate 250 is usually provided on the back of the first end of the flexible printed circuit board to improve the structural strength of the soldering area of the first end 210.

[0063] Refer to Figure 2 , which is a schematic diagram of the installation of the reinforcing plate on the flexible printed circuit board in the related technology. The reinforcing plate 250 is pasted on the back of the flexible printed circuit board (i.e., the surface opposite to the surface where the BTB device is located). The size of the reinforcing plate 250 is usually set such that after the reinforcing plate 250 is pasted on the back of the flexible printed circuit board, there is a certain distance between the four peripheral edges of the reinforcing plate 250 and the edges of the flexible printed circuit board (about 0.15 mm, that is, the size of the reinforcing plate 250 is designed to be "shrunk" relative to the flexible printed circuit board), and then the BTB device is soldered on the front of the flexible printed circuit board.

[0064] However, it is found in practical applications that during the production and processing of the reinforcing plate, due to the influence of processing accuracy, there are certain processing errors in the size of the reinforcing plate. At the same time, during the process of pasting the reinforcing plate onto the flexible circuit board, it is inevitable that due to factors such as the accuracy of mechanical equipment or human operation, the reinforcing plate shows a bonding offset phenomenon. All the above reasons may cause the distance between the edge of the reinforcing plate and the edge of the flexible circuit board to be unequal after the reinforcing plate is pasted. For example, one side edge of the reinforcing plate extends beyond the edge of the flexible circuit board, while there is a large vacant area between the other side edge and the edge of the flexible circuit board. This results in the loss of the reinforcing effect in the vacant area, which is adverse to the soldering process of the BTB device, affects the soldering strength between the BTB device and the flexible circuit board, and moreover, during the process flow of the flexible circuit board, the position of the above-mentioned vacant area is extremely easy to be bumped, thus causing damage to the flexible circuit board or the failure of the BTB device soldering. Therefore, the above method has great drawbacks.

[0065] Referring to Figure 3 , which is a schematic diagram of the overall structure of a flexible circuit board according to an embodiment of the present application. It includes a circuit board body 1, a reinforcing structure 2, and a connecting member 3. The circuit board body 1 includes a first end 11 for connecting the PCB on the back of the display panel and a second end 12 for connecting the bonding area on the front of the display panel. The reinforcing structure 2 and the connecting member 3 are both provided at the first end 11.

[0066] Referring to Figure 3 , Figure 4 , Figure 5 and Figure 6 , Figure 4 , which is a schematic diagram of the first end of a flexible circuit board according to an embodiment of the present application. Figure 5 is Figure 4 the right view of Figure 6 is Figure 4 a schematic diagram of the other surface. The circuit board body 1 has a first surface 100 and a second surface 200 opposite to the first surface 100. Among them, the first surface 100 is the front surface of the circuit board body 1. A device area 110 is provided at the position of the first surface 100 close to the second end 12 for installing various capacitor devices. A soldering area 120 is provided at the position of the first surface 100 close to the first end 11 for installing the connecting member 3. The second surface 200 is the back surface of the circuit board body 1. The second surface 200 is connected to the bonding area on the front of the display panel at the position close to the second end 12, and the second surface 200 is connected to the PCB on the back of the display panel at the position close to the first end 11.

[0067] The reinforcing structure 2 includes a first part 21 and a second part 22. The first part 21 is attached to the first surface 100, and the second part 22 is attached to the second surface 200. Both the first part 21 and the second part 22 cover the edge of the first end 11. It should be noted that the "edge" of the first end 11 in this application includes the first side 111 of the first end 11, as well as the second side 112 and the third side 113 located on both sides of the first side 111 respectively. The second side 112 and the third side 113 are both connected to the first side 111, and the first side 111, the second side 112, and the third side 113 form a U-shaped profile.

[0068] In Figure 4 、 Figure 5 and Figure 6 In the illustrated embodiment, the reinforcing structure 2 further includes a first connecting portion 23 fixedly connected between the first part 21 and the second part 22. The first part 21, the second part 22, and the first connecting portion 23 together form a structure with a U-shaped cross-section. The first connecting portion 23 is arranged along the extending direction of the first side 111, so that the reinforcing structure 2 wraps the first side 111. The first part 21, the second part 22, and the first connecting portion 23 can be an integral structure. An avoidance hole 210 is formed in the first part 21, and the opening cross-section of the avoidance hole 210 is greater than or equal to the area of the welding area 120, so that when the reinforcing structure 2 is sleeved outside the first end 11, the welding area 120 is exposed through the avoidance hole 210. The connecting member 3 is fixedly welded to the welding area 120 by the SMT process, so as to be electrically connected to the circuit board body 1. The connecting member 3 can adopt electronic components such as BTB devices.

[0069] A bonding layer 4 is provided between the first part 21, the second part 22, and the first connecting portion 23 and the circuit board body 1, that is, during the assembly process, the reinforcing structure 2 and the circuit board body 1 are attached to each other by bonding. In addition, the whole reinforcing structure 2 can be made of steel material or polyimide material to ensure the structural strength of the reinforcing structure 2.

[0070] As described above, the reinforcement structure 2 of the present application adopts a method of wrapping the first end 11 of the circuit board body 1 of the flexible circuit board, that is, covering the surrounding area of the welding area 120 through the first part 21 and the second part 22, and at the same time reserving an avoidance hole 210 on the first part 21 for the welding and fixing of the connecting piece 3, so as to realize the connection between the connecting piece 3 and the circuit board body 1. Compared with the traditional technology in which the reinforcement structure is a single-piece reinforcement plate, the reinforcement structure 2 of the present application improves the structural strength of the surrounding area of the welding area 120 due to its "wrapping" of the first end 11 of the circuit board body 1, and the edge protection ability of the first end 11 of the circuit board body 1 is improved due to the reinforcement structure 2. Therefore, it can not only meet the welding requirements of the connecting piece 3, but also reduce the possibility of the flexible circuit board being damaged during its manufacturing process flow, thereby improving the production quality of the display device.

[0071] In addition, this "wrapping" installation method of the reinforcement structure 2 on the circuit board body 1 in the present application can also reduce the assembly difficulty between the reinforcement structure 2 and the circuit board body 1. The tolerance rate of the paste between the reinforcement structure 2 and the circuit board body 1 is relatively high, which can reduce the influence of the fitting deviation caused by equipment accuracy and human operation factors on the structural strength of the circuit board body 1.

[0072] The present application also discloses a preparation method of a flexible circuit board based on the above embodiment, which includes:

[0073] Providing the circuit board body 1. Among them, the circuit board body 1 is the circuit board body 1 in the above embodiment.

[0074] Providing a first plate member, referring to Figure 7 , which is a schematic diagram of the initial state of the first plate member. The first plate member is bent along the first crease 201 to form the reinforcement structure 2 in the above embodiment. The reinforcement structure 2 includes a first connecting portion 23 extending along the first crease 201 and a first part 21 and a second part 22 respectively located on both sides of the first connecting portion 23. The first part 21 has an avoidance hole 210 to expose the welding area 120.

[0075] Fixing the reinforcement structure 2 to the first end 11 of the circuit board body 1, so that the first part 21 is attached to the first surface 100, the second part 22 is attached to the second surface 200, and both the first part 21 and the second part 22 cover the edge of the first end 11.

[0076] Providing the connecting piece 3 and fixing the connecting piece 3 to the welding area 120.

[0077] It can be seen that in the above method, the reinforcement structure 2 can be obtained by bending a flat plate structure, that is, the first plate member. Only the avoidance hole 210 needs to be processed on the first plate member during its production process.

[0078] Referring toFigure 8 , Figure 9 and Figure 10 , Figure 8 is a schematic diagram of the first end of a flexible circuit board according to another embodiment of the present application. Figure 9 is a cross-sectional view along line A-A in Figure 8 . Figure 10 is a cross-sectional view along line B-B in Figure 8 . The difference from the above embodiment is that the first part 21 includes a first sub-part 211 and a second sub-part 212, and there is a gap 213 between the first sub-part 211 and the second sub-part 212, that is, the first part 21 is not a continuous flat structure. Based on this, a second connecting part 24 is fixedly connected between the first sub-part 211 and the second part 22, and a third connecting part 25 is fixedly connected between the second sub-part 212 and the second part 22. The second connecting part 24 is arranged along the extending direction of the second side 112, and the third connecting part 25 is arranged along the extending direction of the third side 113, so that the reinforcing structure 2 can wrap the second side 112 and the third side 113 respectively.

[0079] Correspondingly, when the flexible circuit board adopts the above embodiment, its manufacturing method includes:

[0080] Providing a circuit board body 1. Wherein, the circuit board body 1 is the circuit board body 1 in the above embodiment.

[0081] Providing a second plate member, referring to Figure 11 , wherein, Figure 11 (a) is a schematic diagram of the second plate member in the initial state, Figure 11 (b) is a schematic diagram of the second plate member during the bending process, and the final bending form is the schematic diagram shown in Figure 10 . Bend the two ends of the second plate member along the second fold line 202 and the third fold line 203 respectively to form a reinforcing structure 2. The reinforcing structure 2 includes a second connecting part 24 extending along the second fold line 202, a third connecting part 25 extending along the third fold line 203, a second part 22 located between the second connecting part 23 and the third connecting part 25, a first sub-part 211 and a second sub-part 212 opposite to the second part 22. There is a gap 213 between the first sub-part 211 and the second sub-part 212, and there is an avoidance hole 210 on the first part 21 formed by the first sub-part 211 and the second sub-part 212 to expose the welding area 120.

[0082] Fix the reinforcing structure 2 to the first end 11, so that the first part 21 is attached to the first surface 100, the second part 22 is attached to the second surface 200, and both the first part 21 and the second part 22 cover the edge of the first end 11.

[0083] Provide a connecting member 3 and fix the connecting member 3 to the welding area 120.

[0084] It can be seen that when the flexible circuit board adopts the above embodiment, it is also obtained based on the bending of the board member, but the bending method is different from that of the foregoing embodiment.

[0085] The above takes the example that the reinforcing structure 2 is processed from a plate-like structure for exemplary illustration, but it does not limit the present application. The reinforcing structure 2 can also be processed from a tubular structure. Refer to Figure 12 and Figure 13 , Figure 12 is a schematic diagram of the first end of the flexible circuit board according to another embodiment of the present application, Figure 13 is a cross-sectional view taken along the C-C line in Figure 12 . The first part 21 and the second part 22 of the reinforcing structure 2 are both continuous flat structures. The reinforcing structure 2 includes a fourth connecting portion 26 and a fifth connecting portion 27 connected between the first part 21 and the second part 22. The fourth connecting portion 26 is arranged along the extending direction of the second side 112, and the fifth connecting portion 27 is arranged along the extending direction of the third side 113, so that the reinforcing structure 2 is tubular (the tubular here refers to a square tube, and its cross-section is rectangular), and wraps the second side 112 and the third side 113 respectively.

[0086] Correspondingly, when the flexible circuit board adopts the above embodiment, its manufacturing method includes:

[0087] Provide the circuit board body 1. Among them, the circuit board body 1 is the circuit board body 1 in the above embodiment.

[0088] Provide a circular tube. As shown in Figure 14 , it is a schematic diagram of the circular tube and its pressing process. Press the circular tube into a square tube to form the reinforcing structure 2. The reinforcing structure 2 includes a first part 21 and a second part 22 arranged oppositely, and a fourth connecting portion 26 and a fifth connecting portion 27 respectively connected between the first part 21 and the second part 22. The first part 21 has an avoidance hole 210 to expose the welding area 120.

[0089] Fix the reinforcing structure 2 to the first end 11, so that the first part 21 is attached to the first surface 100, the second part 22 is attached to the second surface 200, and both the first part 21 and the second part 22 cover the edge of the first end 11.

[0090] Provide a connecting member 3 and fix the connecting member 3 to the welding area 120.

[0091] It can be seen that in the above processing process, the circular tube is pressed into a square tube, thereby forming a reinforcing structure. In specific applications, the circular tube can be placed in a special mold, and the circular tube is pressed in the mold. The size of the mold depends on the size of the reinforcing structure to be formed.

[0092] The present application also discloses a display device, which includes the flexible circuit board in any of the above embodiments.

[0093] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A flexible circuit board, characterized in that: include: A circuit board body (1), comprising a first end (11) and a second end (12) opposite to the first end (11); the circuit board body (1) comprising a first surface (100) and a second surface (200) opposite to the first surface (100); a welding area (120) is provided on the first surface (100) at a position close to the first end (11); a reinforcing structure (2) disposed at the first end (11), the reinforcing structure (2) comprising a first portion (21) affixed to the first surface (100) and a second portion (22) affixed to the second surface (200), the first portion (21) and the second portion (22) both covering the edge of the first end (11), and the first portion (21) having an avoidance hole (210) to expose the welding area (120); A connecting member (3) is arranged in the welding area (120) and is electrically connected to the circuit board body (1).

2. The flexible circuit board according to claim 1, characterized in that: The edge of the first end (11) comprises a first side edge (111) and a second side edge (112) and a third side edge (113) respectively located on both sides of the first side edge (111); The reinforcing structure (2) further comprises a first connecting portion (23) connected between the first portion (21) and the second portion (22), wherein the first connecting portion (23) is arranged along an extension direction of the first side edge (111) so that the reinforcing structure (2) wraps around the first side edge (111).

3. The flexible circuit board according to claim 1, characterized in that: The edge of the first end (11) comprises a first side edge (111) and a second side edge (112) and a third side edge (113) respectively located on both sides of the first side edge (111); The first portion (21) comprises a first sub-portion (211) and a second sub-portion (212), and a gap (213) is provided between the first sub-portion (211) and the second sub-portion (212). The reinforcing structure (2) further comprises a second connecting portion (24) connected between the first sub-portion (211) and the second portion (22), and a third connecting portion (25) connected between the second sub-portion (212) and the second portion (22), the second connecting portion (24) being arranged along the extension direction of the second side edge (112), and the third connecting portion (25) being arranged along the extension direction of the third side edge (113), so that the reinforcing structure (2) respectively wraps the second side edge (112) and the third side edge (113).

4. The flexible circuit board according to claim 1, characterized in that: The edge of the first end (11) comprises a first side edge (111) and a second side edge (112) and a third side edge (113) respectively located on both sides of the first side edge (111); The reinforcing structure (2) further comprises a fourth connecting portion (26) and a fifth connecting portion (27) connected between the first portion (21) and the second portion (22), wherein the fourth connecting portion (26) is arranged along the extension direction of the second side edge (112), and the fifth connecting portion (27) is arranged along the extension direction of the third side edge (113), so that the reinforcing structure (2) is tubular and wraps around the second side edge (112) and the third side edge (113), respectively.

5. The flexible circuit board according to any one of claims 1 to 4, characterized in that: An adhesive layer (4) is provided between the reinforcement structure (2) and the circuit board body (1).

6. The flexible circuit board according to claim 1, characterized in that: The reinforcement structure (2) is made of steel material or polyimide material.

7. A display device, characterized in that: A flexible circuit board comprising any one of claims 1 to 6.

8. A method for preparing a flexible circuit board, characterized in that: include: A circuit board body (1) is provided, wherein the circuit board body (1) has a first end (11) and a second end (12) opposite to the first end (11), and the circuit board body (1) has a first surface (100) and a second surface (200) opposite to the first surface (100), and a welding area (120) is provided on the first surface (100) at a position close to the first end (11); A first plate is provided, and the first plate is bent along a first fold (201) to form a reinforcement structure (2), wherein the reinforcement structure (2) comprises a first connecting portion (23) extending along the first fold (201), and a first part (21) and a second part (22) respectively located on both sides of the first connecting portion (23), and the first part (21) has an avoidance hole (210) to expose the welding area (120); The reinforcing structure (2) is fixed to the first end (11), so that the first part (21) is in contact with the first surface (100), the second part (22) is in contact with the second surface (200), and the first part (21) and the second part (22) both cover the edge of the first end (11); Providing a connecting member (3), and fixing the connecting member (3) to the welding area (120); The edge of the first end (11) comprises a first side edge (111) and a second side edge (112) and a third side edge (113) respectively located on both sides of the first side edge (111); the first connecting portion (23) is arranged along the extension direction of the first side edge (111), so that the reinforcing structure (2) wraps around the first side edge (111).

9. A method for preparing a flexible circuit board, characterized in that: include: A circuit board body (1) is provided, wherein the circuit board body (1) has a first end (11) and a second end (12) opposite to the first end (11), and the circuit board body (1) has a first surface (100) and a second surface (200) opposite to the first surface (100), and a welding area (120) is provided on the first surface (100) at a position close to the first end (11); A second plate is provided, and two ends of the second plate are bent along a second fold (202) and a third fold (203) respectively to form a reinforcement structure (2), wherein the reinforcement structure (2) comprises a second connecting portion (24) extending along the second fold (202), a third connecting portion (25) extending along the third fold (203), a second portion (22) located between the second connecting portion (24) and the third connecting portion (25), a first sub-portion (211) and a second sub-portion (212) opposite to the second portion (22), a gap (213) being provided between the first sub-portion (211) and the second sub-portion (212), and a avoidance hole (210) being provided on the first portion (21) formed by the first sub-portion (211) and the second sub-portion (212) to expose the welding area (120); The reinforcing structure (2) is fixed to the first end (11), so that the first part (21) is in contact with the first surface (100), the second part (22) is in contact with the second surface (200), and the first part (21) and the second part (22) both cover the edge of the first end (11); Providing a connecting member (3), and fixing the connecting member (3) to the welding area (120); The edge of the first end (11) comprises a first side edge (111) and a second side edge (112) and a third side edge (113) respectively located on both sides of the first side edge (111); the second connecting portion (24) is arranged along the extension direction of the second side edge (112); and the third connecting portion (25) is arranged along the extension direction of the third side edge (113), so that the reinforcing structure (2) wraps the second side edge (112) and the third side edge (113) respectively.

10. A method for preparing a flexible circuit board, characterized in that: include: A circuit board body (1) is provided, wherein the circuit board body (1) has a first end (11) and a second end (12) opposite to the first end (11), and the circuit board body (1) has a first surface (100) and a second surface (200) opposite to the first surface (100), and a welding area (120) is provided on the first surface (100) at a position close to the first end (11); A round tube is provided, and the round tube is pressed into a square tube to form a reinforcement structure (2), wherein the reinforcement structure (2) comprises a first part (21) and a second part (22) arranged opposite to each other, and a fourth connecting part (26) and a fifth connecting part (27) respectively connected between the first part (21) and the second part (22), and the first part (21) has an avoidance hole (210) to expose the welding area (120); The reinforcing structure (2) is fixed to the first end (11), so that the first part (21) is in contact with the first surface (100), the second part (22) is in contact with the second surface (200), and the first part (21) and the second part (22) both cover the edge of the first end (11); Providing a connecting member (3), and fixing the connecting member (3) to the welding area (120); The edge of the first end (11) comprises a first side edge (111) and a second side edge (112) and a third side edge (113) respectively located on both sides of the first side edge (111); the fourth connecting portion (26) is arranged along the extension direction of the second side edge (112); and the fifth connecting portion (27) is arranged along the extension direction of the third side edge (113), so that the reinforcing structure (2) wraps the second side edge (112) and the third side edge (113) respectively.

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