FPC structure of liquid crystal display module
By setting up local reinforcement steel sheets on the FPC of the LCD module and pasting conductive double-sided sticking on it, the problem of shrinkage of flexible circuit boards and lowering of conductive double-sided sticking at high temperatures is solved, and the welding effect and sticking are improved Connection reliability reduces the impact of static electricity.
Patent Information
- Application Number
- CN202420108453.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-16
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-16
AI Technical Summary
During the high-temperature welding process of the FPC of the LCD module, the flexible circuit board is likely to shrink and form wrinkles, and the viscosity of conductive double-sided sticking decreases, affecting the welding effect and bonding reliability.
Set up local reinforced steel sheets in the component area of the flexible circuit board, and stick conductive double-sided sticks on the local reinforced steel sheets to avoid direct impact of the conductive double-sided sticks being affected by high temperatures, ensuring sticky characteristics and welding effects.
The strength of the flexible circuit board is strengthened by partially reinforcing steel sheets, prevent shrinkage and wrinkles, improve welding effect, and maintain high viscosity of conductive double-sided stickiness, ensuring that the electronic components are welded firmly and statically reduced.
Smart Images
Figure CN222216023U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid crystal display module production and manufacturing, in particular to an FPC structure of a liquid crystal display module. Background Art
[0002] FPC is a flexible circuit board with high wiring density, light weight, thin thickness and good bendability. The LCD module is electrically connected to the driving circuit through FPC to realize the display function. The FPC of the LCD module is fixed on the backlight module or display module through conductive double-sided adhesive. The incoming FPC is not assembled with soldered electronic components, and the incoming FPC generally comes with conductive double-sided adhesive. In the process of soldering components on the FPC, the FPC must pass through the SMT high-temperature furnace. When the FPC passes through high temperature, the flexible circuit board is affected by the high temperature and easily shrinks to form wrinkles, affecting the quality of the LCD module; and the conductive double-sided adhesive after high temperature, the viscosity is affected by the high temperature and decreases, resulting in the phenomenon that the conductive double-sided adhesive will rebound after bonding and the FPC is not firmly bonded. Utility Model Content
[0003] The purpose of the utility model is to overcome the shortcomings of the prior art, provide an FPC structure of a liquid crystal display module, ensure the welding effect of electronic components, and effectively improve the problem of decreased adhesiveness of the conductive double sides due to high temperature.
[0004] The purpose of this utility model is achieved through the following technical solutions:
[0005] An FPC structure of a liquid crystal display module comprises: a flexible circuit board, a component area is arranged on the surface of the flexible circuit board, a local reinforcement steel sheet is arranged on the other side of the flexible circuit board corresponding to the component area, the local reinforcement steel sheet is adhered to the flexible circuit board, and a conductive double-sided adhesive is adhered to the outer side of the local reinforcement steel sheet.
[0006] In one embodiment, the shape of the local reinforcement steel sheet expands by 0.5 mm outside the area corresponding to the component area.
[0007] In one embodiment, the local reinforcing steel sheet is arranged inside the boundary range of the flexible circuit board.
[0008] In one embodiment, the conductive double-sided adhesive is arranged in the area of the local reinforcement steel sheet.
[0009] In one embodiment, the conductive double-sided adhesive is adhered along the long side of the local reinforcement steel sheet.
[0010] In one embodiment, the conductive double-sided adhesive tape is provided in two strips, and the widths of the two conductive double-sided adhesive tapes are the same.
[0011] In one embodiment, the flexible circuit board is a single-sided board.
[0012] In this application, the incoming flexible circuit board does not have conductive double-sided adhesive, and a local reinforcing steel sheet is adhered to the flexible circuit board. After the flexible circuit board is soldered with electronic components and passes through an SMT high-temperature furnace, the conductive double-sided adhesive is adhered to the local reinforcing steel sheet.
[0013] Compared with the prior art, the utility model has at least the following advantages:
[0014] (1) The utility model provides an FPC structure of a liquid crystal display module. By arranging a local reinforcing steel sheet on the other side of the flexible circuit board corresponding to the component area, the strength of the component area on the flexible circuit board can be strengthened, so that the component area is in a flat state when the electronic components are welded, thereby preventing the electronic components from being welded loosely and ensuring the welding effect of the electronic components; the flexible circuit board can be prevented from shrinking and wrinkling when exposed to high temperature; the local reinforcing steel sheet can also assist in grounding the flexible circuit board and reduce the influence of static electricity on the liquid crystal display module.
[0015] (2) The utility model provides an FPC structure of a liquid crystal display module, wherein the conductive double-sided adhesive is adhered to a local reinforcing steel sheet to ensure the high viscosity of the conductive double-sided adhesive. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 A schematic diagram of the front structure of an FPC structure of a liquid crystal display module;
[0018] Figure 2 A schematic diagram of the back structure of an FPC structure of a liquid crystal display module;
[0019] Figure 3 The figure is a side structural diagram of an FPC structure of a liquid crystal display module.
[0020] Description of the drawings: 10, flexible circuit board; 101, component area; 20, local reinforcement steel sheet; 30, conductive double-sided adhesive. DETAILED DESCRIPTION
[0021] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.
[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0024] Reference Figure 1 , Figure 2 and Figure 3 , an FPC structure of a liquid crystal display module, comprising: a flexible circuit board 10, a component area 101 is arranged on the surface of the flexible circuit board 10, a local reinforcement steel sheet 20 is arranged on the other side of the flexible circuit board 10 corresponding to the component area 101, the local reinforcement steel sheet 20 is adhered to the flexible circuit board 10, and a conductive double-sided adhesive 30 is adhered to the outer side of the local reinforcement steel sheet 20.
[0025] The incoming flexible circuit board 10 does not have the conductive double-sided adhesive 30, and the local reinforcement steel sheet 20 is pasted on the flexible circuit board 10. After the flexible circuit board 10 is welded with electronic components and passes through the SMT high-temperature furnace, the conductive double-sided adhesive 30 is pasted on the local reinforcement steel sheet 20 to avoid the conductive double-sided adhesive 30 passing through the SMT high-temperature furnace, thereby ensuring the high viscosity of the conductive double-sided adhesive 30. By arranging the local reinforcement steel sheet 20 on the other side of the flexible circuit board 10 corresponding to the component area 101, the strength of the component area 101 on the flexible circuit board 10 can be strengthened, so that the component area 101 is in a flat state when the electronic components are welded, preventing the electronic components from being welded loosely, and ensuring the welding effect of the electronic components; it can prevent the flexible circuit board 10 from shrinking and wrinkling when passing through high temperatures; the local reinforcement steel sheet 20 can also assist the flexible circuit board 10 in grounding, reducing the impact of static electricity on the liquid crystal display module.
[0026] Furthermore, the shape of the local reinforcing steel sheet 20 corresponds to the area of the component area 101 and is expanded by 0.5 mm, and the local reinforcing steel sheet 20 is arranged inside the boundary range of the flexible circuit board 10. The area of the local reinforcing steel sheet 20 is slightly larger than the component area 101 on the flexible circuit board 10, which can better reinforce the component area 101 and improve the welding effect of the electronic components; since the flexible circuit board 10 is designed in combination with the internal space size of the liquid crystal display module, the local reinforcing steel sheet 20 is arranged inside the boundary range of the flexible circuit board 10, ensuring that the flexible circuit board 10 can be used in the internal space of the liquid crystal display module, thereby improving assembly efficiency.
[0027] Furthermore, the conductive double-sided adhesive 30 is arranged in the area of the local reinforcing steel sheet 20, and the conductive double-sided adhesive 30 is adhered along the long side of the local reinforcing steel sheet 20. The conductive double-sided adhesive 30 is arranged in two strips, and the width of the two conductive double-sided adhesives 30 is the same. The conductive double-sided adhesive 30 of appropriate size is designed according to the position of the local reinforcing steel sheet 20, so as to improve the adhesion effect of the flexible circuit board 10 and reduce the cost.
[0028] Furthermore, the flexible circuit board 10 is a single-sided board.
[0029] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. An FPC structure of a liquid crystal display module, comprising: A flexible circuit board (10), characterized in that a component area (101) is provided on the surface of the flexible circuit board (10), a local reinforcing steel sheet (20) is provided on the other side of the flexible circuit board (10) corresponding to the component area (101), the local reinforcing steel sheet (20) is adhered to the flexible circuit board (10), and a conductive double-sided adhesive (30) is adhered to the outer side of the local reinforcing steel sheet (20).
2. The FPC structure of a liquid crystal display module according to claim 1, characterized in that: The shape of the local reinforcing steel sheet (20) corresponds to the area of the element area (101) and expands by 0.5 mm.
3. The FPC structure of a liquid crystal display module according to claim 2, characterized in that: The local reinforcing steel sheet (20) is arranged inside the boundary range of the flexible circuit board (10).
4. The FPC structure of a liquid crystal display module according to claim 3, characterized in that: The conductive double-sided adhesive (30) is arranged in the area of the local reinforcement steel sheet (20).
5. The FPC structure of a liquid crystal display module according to claim 4, characterized in that: The conductive double-sided adhesive (30) is adhered along the long side of the local reinforcement steel sheet (20).
6. The FPC structure of a liquid crystal display module according to claim 5, characterized in that: The conductive double-sided adhesive tape (30) is provided as two strips, and the width dimensions of the two conductive double-sided adhesive tapes (30) are the same.
7. The FPC structure of a liquid crystal display module according to claim 1, characterized in that: The flexible circuit board (10) is a single-sided board.