Anti-tearing flexible circuit board structure, FOG module and display screen

Abstract

The utility model provides an anti-tear flexible circuit board structure, an FOG module and a display screen, and relates to the technical field of display, the anti-tear flexible circuit board structure comprises a flexible circuit board main body, two sides of the flexible circuit board main body along the width direction are respectively connected with a glass panel and a PCB; the anti-tearing structure is arranged on one side, close to the end part of the glass panel, of the flexible circuit board main body in the length direction of the flexible circuit board main body and is connected with the glass panel and the PCB, the anti-tearing structure comprises a bridge section area connected with the end part of the flexible circuit board main body and an ineffective area connected with the bridge section area, and a gap is formed between the ineffective area and the flexible circuit board main body. The flexible circuit board has the beneficial effects that the anti-tearing structure is additionally arranged at the end part of the flexible circuit board main body, so that the anti-tearing structure becomes a main stress area of transverse stress of the flexible circuit board main body, and tearing at the joint of the flexible circuit board main body and the glass panel and the PCB can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of display technology, and in particular to an anti-tearing flexible circuit board structure, a FOG module and a display screen. Background Art

[0002] FOG (fpc on glass) is a production process used in the flat panel display industry (such as LCD screens, e-paper). It uses ACF (Anisotropic Conductive Film) conductive adhesive as a medium to bind FPC (Flexible Printed Circuit) to the glass through a certain temperature, pressure, and time. It has developed into a mature process.

[0003] At present, the use of FPC (Flexible Printed Circuit) to connect glass panels and PCB boards has been widely used in mobile phones and other communication consumer products. FPC (Flexible Printed Circuit) is a printed circuit board made of flexible insulating substrate, mainly polyimide or polyester film. It can be bent, rolled, and folded freely. It has the advantages of small size, light weight, good heat dissipation and weldability, easy installation and connection, and low overall cost. Compared with hard boards, it has certain market advantages and is suitable for the development of electronic products towards high density, miniaturization, and high reliability.

[0004] However, when the existing FPC (Flexible Printed Circuit) is connected to the glass panel, due to its own softness, the FPC (Flexible Printed Circuit) is easily torn off at the connection between the end of the FPC (Flexible Printed Circuit) and the glass panel during production line operation, affecting product quality. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides an anti-tearing flexible circuit board structure, comprising:

[0006] A flexible circuit board body, wherein two sides of the flexible circuit board body along the width direction are respectively connected to the glass panel and the PCB board;

[0007] An anti-tearing structure is arranged on one side of the end of the flexible circuit board body close to the glass panel along the length direction of the flexible circuit board body and connects the glass panel and the PCB board, the anti-tearing structure includes a bridge section area connecting the end of the flexible circuit board body and an invalid area connecting the bridge section area, and there is a gap between the invalid area and the flexible circuit board body.

[0008] Preferably, the width of the bridge region is smaller than the width of the ineffective region.

[0009] Preferably, the bridge section has a length of 1 mm to 3 mm and a width of 3 mm to 1 cm.

[0010] Preferably, the length of the ineffective area is 3 mm-1 cm, and the width is the same as that of the flexible circuit board body.

[0011] Preferably, a gold finger area is provided at the connection between the glass panel, the PCB board and the anti-tearing structure, and the anti-tearing structure connects the glass panel and the PCB board through the gold finger area.

[0012] Preferably, the anti-tearing structure is bonded to the gold finger region via an anisotropic conductive adhesive film.

[0013] The utility model also provides a FOG module, comprising the above-mentioned flexible circuit board structure.

[0014] The utility model also provides a display screen, comprising the above-mentioned FOG module.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] 1) By adding an anti-tear structure at the end of the flexible circuit board body, the anti-tear structure becomes the main force-bearing area of ​​the flexible circuit board body when it is subjected to lateral force, which can effectively improve the tearing of the connection between the flexible circuit board body and the glass panel and the PCB board;

[0017] 2) The anti-tear structure is designed to be a bridge area and an invalid area, and there is a gap between the invalid area and the flexible circuit board body. On the one hand, even if the invalid area is torn, it will not cause the connection between the flexible circuit board body and the glass panel and the PCB board to tear. On the other hand, the existence of the gap makes it easy to visually check the tearing situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of an existing flexible circuit board body connecting a glass substrate and a PCB board;

[0019] Figure 2 This is a schematic diagram of a tear-resistant flexible circuit board structure in a preferred embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the structure of a flexible circuit board structure connecting a glass substrate and a PCB board in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention is not limited to the implementation mode, and other implementation modes may also fall within the scope of the present invention as long as they meet the purpose of the present invention.

[0022] In a preferred embodiment of the present utility model, based on the above problems existing in the prior art, a tear-proof flexible circuit board structure is provided, such as Figure 2 and Figure 3 As shown, including:

[0023] A flexible circuit board body 1, wherein two sides of the flexible circuit board body 1 along the width direction are respectively connected to a glass panel 2 and a PCB board 3;

[0024] The anti-tear structure is arranged on one side of the end of the flexible circuit board body 1 close to the glass panel 2 along the length direction of the flexible circuit board body 1 and connects the glass panel 2 and the PCB board 3. The anti-tear structure includes a bridge section area 4 connecting the end of the flexible circuit board body 1 and an invalid area 5 connecting the bridge section area 4, and there is a gap between the invalid area 5 and the flexible circuit board body 1.

[0025] Specifically, during the production process of the display screen, Figure 1 As shown, after the glass panel 1 and the PCB board 3 are connected by the flexible circuit board body 1, in the subsequent production process, if the glass panel 1 or the PCB board 3 is pulled separately, the connection between the flexible circuit board body 1 and the glass panel 2 and the PCB board 3 (such as Figure 1 The dotted line area shown in the figure is subjected to lateral force, which may lead to the following Figure 1 Based on this, in this embodiment, an anti-tear structure is added to the end of the flexible circuit board body 1 along the length direction. Figure 3 The dotted line framed area shown in the figure is closer to the end of the glass panel 2, so that it replaces the end of the flexible circuit board body 1 and becomes the main force-bearing area for lateral force, thereby effectively protecting the connection between the flexible circuit board body 1 and the glass panel 2 and the PCB board 3 from tearing.

[0026] Furthermore, if Figure 2As shown, by setting the bridge area 4 in the anti-tear structure so that there is a gap between the invalid area 5 and the flexible circuit board body 1, the tearing of the connection between the flexible circuit board body 1 and the glass panel 2 and the PCB board 3 caused by the tearing of the invalid area 5 can be reduced as much as possible. On the other hand, due to the existence of the gap, the production personnel can intuitively see whether only the invalid area 5 is partially or completely torn off, or whether the connection between the flexible circuit board body 1 and the glass panel 2 and the PCB board 3 is also torn off, and then take corresponding countermeasures.

[0027] As a preferred embodiment, Figure 3 As shown, the PCB board 3 includes two left and right pieces, which are connected to the glass panel 2 through the flexible circuit board body 1. In this embodiment, it is only necessary to set an anti-tearing structure on the side close to the end of the glass panel 2, but it is not limited to this.

[0028] In a preferred embodiment of the present invention, the width of the bridge region 4 is smaller than the width of the ineffective region 5 .

[0029] Specifically, in this embodiment, the width of the bridge area 4 is designed to be smaller than the width of the ineffective area 5 , so that a gap is formed between the ineffective area 5 and the flexible circuit board body 1 .

[0030] In a preferred embodiment of the present invention, the length of the bridge section 4 is 1 mm-3 mm, and the width is 3 mm-1 cm.

[0031] In a preferred embodiment of the present invention, the length of the ineffective area 5 is 3 mm-1 cm, and the width is the same as that of the flexible circuit board body 1 .

[0032] In a preferred embodiment of the utility model, a gold finger area is provided at the connection between the glass panel 2 and the PCB board 3 and the anti-tearing structure, and the anti-tearing structure connects the glass panel 2 and the PCB board 3 through the gold finger area.

[0033] Specifically, gold finger areas are provided on the glass panel 2 and the PCB board 3, and the two sides of the flexible circuit board body 1 along the width direction are connected correspondingly through anisotropic conductive adhesive films. In this embodiment, by extending the gold finger area, the two sides of the invalid area 5 are conveniently connected to the glass panel 2 and the PCB board 3, without the need to improve the production process.

[0034] In a preferred embodiment of the utility model, the anti-tearing structure is connected to the gold finger area by bonding with anisotropic conductive adhesive film.

[0035] The utility model also provides a FOG module, comprising the above-mentioned flexible circuit board structure.

[0036] Specifically, in this embodiment, when the FOG module requires the PCB board to be folded back to the back of the glass panel 2, the invalid area 5 in the anti-tearing structure can be retained or cut off according to actual needs. In the actual operation process, the following situations may exist, such as the invalid area 5 is torn off, or the invalid area 5 affects the assembly folding operation, or the invalid area 5 affects the product shipping form of the FOG module. At this time, the invalid area 5 can be cut off to reduce its impact on the product itself. More preferably, the connection between the invalid area 5 and the bridge section area 4 can be set as a hollow structure, so that the invalid area 5 can be directly broken off from the bridge section area 4, which is convenient for operation.

[0037] The utility model also provides a display screen, comprising the above-mentioned FOG module.

[0038] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. A tear-resistant flexible circuit board structure, characterized in that: include: A flexible circuit board body, wherein two sides of the flexible circuit board body along the width direction are respectively connected to the glass panel and the PCB board; An anti-tearing structure is arranged on one side of the end of the flexible circuit board body close to the glass panel along the length direction of the flexible circuit board body and connects the glass panel and the PCB board, the anti-tearing structure includes a bridge section area connecting the end of the flexible circuit board body and an invalid area connecting the bridge section area, and there is a gap between the invalid area and the flexible circuit board body.

2. The flexible circuit board structure according to claim 1, characterized in that: The width of the bridge region is smaller than the width of the ineffective region.

3. The flexible circuit board structure according to claim 1, characterized in that: The length of the bridge section area is 1mm-3mm, and the width is 3mm-1cm.

4. The flexible circuit board structure according to claim 1, characterized in that: The length of the ineffective area is 3mm-1cm, and the width is the same as that of the flexible circuit board body.

5. The flexible circuit board structure according to claim 1, characterized in that: A gold finger area is provided at the connection between the glass panel, the PCB board and the anti-tearing structure, and the anti-tearing structure connects the glass panel and the PCB board through the gold finger area.

6. The flexible circuit board structure according to claim 5, characterized in that: The anti-tearing structure is bonded to the gold finger area through an anisotropic conductive adhesive film.

7. A FOG module, characterized in that: It comprises a flexible circuit board structure as described in any one of claims 1 to 6.

8. A display screen, characterized in that: Comprising a FOG module as claimed in claim 7.

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