CN219834475U - Flexible printed circuit board and liquid crystal display module - Google Patents
Flexible printed circuit board and liquid crystal display module Download PDFInfo
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- CN219834475U CN219834475U CN202320961508.2U CN202320961508U CN219834475U CN 219834475 U CN219834475 U CN 219834475U CN 202320961508 U CN202320961508 U CN 202320961508U CN 219834475 U CN219834475 U CN 219834475U
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- printed circuit
- circuit board
- flexible printed
- golden finger
- hot
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 14
- 238000005452 bending Methods 0.000 claims abstract description 35
- 238000007731 hot pressing Methods 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000013461 design Methods 0.000 abstract description 6
- 238000005476 soldering Methods 0.000 description 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 206010017076 Fracture Diseases 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Landscapes
- Structure Of Printed Boards (AREA)
Abstract
The utility model provides a flexible printed circuit board and a liquid crystal display module, and belongs to the technical field of circuit boards. One end of the golden finger of the hot-pressing end and the pulling-inserting end at the interface of the body is not on the same straight line. The flexible printed circuit board can improve the bending resistance of the golden finger interface by improving the design of the golden finger, and reduce the problem of golden finger fracture and breakage in the production process.
Description
Technical Field
The utility model relates to the technical field of circuit boards, in particular to a flexible printed circuit board and a liquid crystal display module.
Background
The FPC is an abbreviation of flexible printed circuit board, and is a flexible printed circuit board with high reliability, which is made of polyimide or polyester film as a base material, and has the advantages of high wiring density, less limitation of wiring space, light weight, thin thickness and high flexibility, and is widely applied to circuit connection of liquid crystal display modules (LCMs). The golden fingers at the hot-pressing end and the plugging end of the traditional FPC are generally in a linear design, and in the processing production and the whole machine assembly process of a linear LCM, the circuit at the interface of the golden fingers of the FPC is often broken and broken due to the fluctuation of the production process, the operation method and the like, so that the liquid crystal display module is free from display or poor in contact and other functional problems.
Accordingly, there is a need for an improvement in FPC to overcome the drawbacks of the prior art.
Disclosure of Invention
In order to overcome the problems in the related art, one of the purposes of the present utility model is to provide a flexible printed circuit board, which can improve the bending resistance of a golden finger interface and reduce the problems of golden finger fracture and breakage in the production process by improving the design of golden fingers.
The utility model provides a flexible printed circuit board, includes the body, be equipped with hot pressing end and plug end on the body, its characterized in that:
and one end of the golden finger of the hot-pressing end and one end of the golden finger of the pulling-inserting end at the interface of the body are not on the same straight line.
In a preferred technical scheme of the utility model, the golden fingers of the hot-pressing end and the pulling-inserting end respectively comprise a plurality of parallel conductive contact pieces, and one ends of the conductive contact pieces at the interface of the body are not on the same straight line.
In the preferred technical scheme of the utility model, one end of the golden finger of the hot-pressing end and the pulling-inserting end at the interface of the body forms a wavy interface.
In the preferred technical scheme of the utility model, the golden fingers of the hot-pressing end and the pulling-inserting end comprise a plurality of conductive contact pieces which are arranged in parallel;
the side wall of the conductive contact piece on the hot pressing end and/or the conductive contact piece on the pulling-inserting end is a smooth arc line.
In a preferred technical scheme of the utility model, the conductive contact consists of a plurality of bonding pads with different areas, and the connection part of each bonding pad is transited through a smooth arc. The edge line of the bonding pad is in a smooth arc line, no break point exists, and the stress can be dispersed to each position of the corner, so that the risk of fracture at the bonding pad connection position is reduced.
In a preferred technical scheme of the utility model, one end of the golden finger is positioned at the edge of the body, and a notch is formed on the golden finger positioned at the edge of the body. Because of the existence of the notch, the soldering tin can flow in the notch, so that the soldering tin is not easy to diffuse, the situation of connecting the soldering tin can not occur, and the soldering tin effect and the gold finger soldering stability are improved.
In the preferred technical scheme of the utility model, the connection parts of the hot-pressing end and the pulling-inserting end and the body are respectively provided with a bending part, and bending-resistant strips are arranged in the bending parts. The bending-resistant strip is a metal strip arranged along the bending part, so that the bending-resistant capability of the bending part can be improved.
Another object of the present utility model is to provide a liquid crystal display module, including the flexible printed circuit board.
The beneficial effects of the utility model are as follows:
the utility model provides a flexible printed circuit board and a liquid crystal display module. The golden fingers of the hot-pressing end and the pulling-inserting end are not on the same straight line with one end of the body. According to the flexible printed circuit board, the design of the golden finger is improved, so that one end of the golden finger connected with the body is not located between the golden finger and the body, and bending stress at the joint of the golden finger and the body can be dispersed, so that the bending resistance of the golden finger interface is improved. The golden finger with bending resistance can reduce the risk of bending and breaking of the golden finger of the flexible printed circuit board in the processing production and assembly processes of LCM.
Drawings
Fig. 1 is a front view of a flexible printed circuit board provided by the present utility model;
fig. 2 is a side view of a flexible printed circuit board provided by the present utility model;
FIG. 3 is a schematic view of the structure of the wavy interface provided by the utility model on the body;
FIG. 4 is a schematic view of a conductive contact provided by the present utility model with smooth arc sidewalls;
fig. 5 is a schematic structural view of the bending portion provided by the present utility model disposed on the body;
FIG. 6 is a schematic view of a structure of a notch side of a golden finger according to the present utility model;
fig. 7 is a schematic structural diagram of a gold finger composed of different bonding pads.
Reference numerals:
1. pulling out the plug end; 2. a body; 3. hot pressing the end; 4. a golden finger; 41. a wave-shaped interface; 411. a bonding pad; 5. a bending part; 51. bending-resistant strips.
Detailed Description
Preferred embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the utility model. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Examples
Because the golden fingers at the hot-pressing end and the plugging end of the traditional FPC are generally in a linear design, in the processing production and the whole machine assembly process of a linear LCM, the circuit at the interface of the golden fingers of the FPC is often broken and broken due to the fluctuation of the production process, the operation method and the like, so that the liquid crystal display module has the functional problems of no display, poor contact and the like. Research shows that the linear FPC golden finger interface is easy to break due to the fact that stress is too concentrated. Based on this, the present utility model provides a flexible printed circuit board.
As shown in fig. 1-7, the flexible printed circuit board comprises a body 2, wherein a hot pressing end 3 and a plugging end 1 are arranged on the body 2, and one end of each of the hot pressing end 3 and one end of each of the golden fingers 4 of the plugging end 1 at the interface of the body 2 are not on the same straight line.
The main body 2, i.e., the main structure of the flexible printed circuit board, comprises a base material made of polyimide or polyester film, and further comprises an insulating film, a knife conductor, an adhesive, a reinforcing plate and the like. The fact that the ends of the golden fingers 4 at the interface of the body 2 are not in the same straight line can mean that the ends of two adjacent golden fingers 4 are not in the same straight line or that the golden fingers 4 are not in the same straight line.
In the flexible printed circuit board and the liquid crystal display module, the body 2 of the flexible printed circuit board is provided with the hot pressing end 3 and the plugging end 1. The hot-pressing end 3 and the golden finger 4 of the plug-in end 1 are not on the same straight line with the end connected with the body 2. According to the flexible printed circuit board, the design of the golden finger 4 is improved, so that one end, connected with the body 2, of the golden finger 4 is not located between the golden finger and the body 2, bending stress at the connecting position of the golden finger 4 and the body 2 can be dispersed, and therefore bending resistance of an interface of the golden finger 4 is improved. The bending resistance of the golden finger 4 can reduce the risk of bending and breaking of the golden finger 4 of the flexible printed circuit board in the processing production and assembly processes of LCM. In a preferred technical scheme of the utility model, the hot-pressing end 3 and the golden finger 4 of the plugging end 1 comprise a plurality of parallel conductive contact pieces, and one end of each conductive contact piece at the interface of the body 2 is not on the same straight line.
In a more preferred embodiment, the hot press end 3 and the golden finger 4 of the pull-out end 1 form a wavy interface 41 at one end of the interface of the body 2.
The wavy arrangement means that the connecting line of the middle point of the connecting end of each golden finger 4 and the body 2 is wavy, and the wavy arrangement can be regular or regular. Regular undulations refer to adjacent peaks and valleys being collinear.
More specifically, the hot pressing end 3 and the golden finger 4 of the plugging end 1 each include a plurality of conductive contacts arranged in parallel;
the side walls of the conductive contact pieces on the hot pressing end 3 and/or the conductive contact pieces on the pulling-in end 1 are smooth arcs. The side wall referred to herein is the side wall of the end portion of the opposite conductive contact that is connected to the body 2. The side wall is arranged to be a house type, and the golden finger 4 is not in a straight line structure any more, so that the stress condition of the whole golden finger 4 can be improved, and the bending resistance of the whole conductive contact piece is improved.
Further, the conductive contact consists of a plurality of pads 411 with different areas, and the connection part of each pad 411 is transited by a smooth arc. The edge line of the bonding pad 411 is in a smooth arc line without a break point, so that the stress of the conductive contact can be dispersed to each position of the turning, and the risk of fracture is reduced. The area of each bonding pad 411 on the same conductive contact may be equal or unequal; however, the difference between the largest area pad 411 and the smallest area pad 411 does not exceed the largest area pad 41110%, which is to ensure that the shapes of the portions of the conductive contact are not excessively different, resulting in increased production difficulty.
Further, one end of the golden finger 4 is located at the edge of the body 2, and a notch is formed on the golden finger 4 located at the edge of the body 2. Due to the existence of the notch, the soldering tin can flow in the notch, so that the soldering tin is not easy to diffuse, the situation of connecting the soldering tin can not occur, and the soldering tin effect and the soldering stability of the golden finger 4 are improved. The notch may be a circular arc notch.
Further, the connection parts of the hot pressing end 3 and the plugging end 1 with the body 2 are respectively provided with a bending part 5, and bending-resistant strips 51 are arranged in the bending parts 5. The bending-resistant strip 51 is a metal strip provided along the bending portion 5, and can improve the bending resistance of the bending portion 5. The metal strip is made of copper strips and is embedded into the bending part 5. More specifically, the bending portion 5 has a circular arc shape recessed from the surface of the body 2 toward the inside, and the bending-resistant strip 51 is provided along the circular arc direction of the bending portion 5.
The utility model also provides a liquid crystal display module, which comprises the flexible printed circuit board. The flexible printed circuit is not easy to bend during the production of the liquid crystal display module, so that the failure rate of the liquid crystal display module can be reduced, and the production efficiency is improved.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures. The foregoing description of the preferred embodiments of the utility model is merely exemplary in nature and is in no way intended to limit the utility model,
various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. The utility model provides a flexible printed circuit board, includes body (2), be equipped with hot pressing end (3) and pull out plug end (1) on body (2), its characterized in that:
one end of the hot-pressing end (3) and/or one end of the golden finger (4) of the pulling-inserting end (1) at the interface of the body (2) is not on the same straight line.
2. The flexible printed circuit board of claim 1, wherein:
the hot-pressing end (3) and the golden finger (4) of the pulling-inserting end (1) comprise a plurality of parallel conductive contact pieces, and one ends of the conductive contact pieces at the interface of the body (2) are not on the same straight line.
3. The flexible printed circuit board according to claim 2, wherein:
one end of the hot-pressing end (3) and the golden finger (4) of the pulling-inserting end (1) at the interface of the body (2) forms a wavy interface (41).
4. The flexible printed circuit board of claim 1, wherein:
the hot-pressing end (3) and the golden finger (4) of the pulling-inserting end (1) comprise a plurality of conductive contact pieces which are arranged in parallel;
the side wall of the conductive contact piece on the hot-pressing end (3) and/or the conductive contact piece of the pulling-inserting end (1) is a smooth arc line.
5. The flexible printed circuit board according to claim 2, wherein:
the conductive contact consists of a plurality of bonding pads (411) with different areas, and the connection part of each bonding pad (411) is transited through a smooth arc.
6. The flexible printed circuit board according to any one of claims 1 to 5, wherein:
one end of the golden finger (4) is positioned at the edge of the body (2), and a notch is formed in the golden finger (4) positioned at the edge of the body (2).
7. The flexible printed circuit board of claim 6, wherein:
the hot-pressing end (3) and the connection part of the pulling-inserting end (1) and the body (2) are respectively provided with a bending part (5), and bending-resistant strips (51) are arranged in the bending parts (5).
8. A liquid crystal display module is characterized in that: a flexible printed circuit board comprising the device according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320961508.2U CN219834475U (en) | 2023-04-25 | 2023-04-25 | Flexible printed circuit board and liquid crystal display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320961508.2U CN219834475U (en) | 2023-04-25 | 2023-04-25 | Flexible printed circuit board and liquid crystal display module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219834475U true CN219834475U (en) | 2023-10-13 |
Family
ID=88247210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320961508.2U Active CN219834475U (en) | 2023-04-25 | 2023-04-25 | Flexible printed circuit board and liquid crystal display module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219834475U (en) |
-
2023
- 2023-04-25 CN CN202320961508.2U patent/CN219834475U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |