CN216052507U

CN216052507U - Structure for preventing FPC from being broken and torn

Info

Publication number: CN216052507U
Application number: CN202122242411.XU
Authority: CN
Inventors: 莫雅馨; 吴旋; 卢志坚
Original assignee: Shenzhen Zhongshen Optoelectronics Co ltd
Current assignee: Shenzhen Zhongshen Optoelectronics Co ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-03-15
Anticipated expiration: 2031-09-15

Abstract

The utility model discloses a structure for preventing FPC from being broken and torn, which relates to backlight of a liquid crystal module, and comprises a substrate and the liquid crystal module, wherein the substrate is welded at the bottom of the liquid crystal module, a bonding pad is arranged at the bottom of the substrate, and a first connecting wire and a second connecting wire are connected to the upper part inside the bonding pad through a conductive through hole.

Description

Structure for preventing FPC from being broken and torn

Technical Field

The utility model relates to a backlight of a liquid crystal module, in particular to a structure for preventing FPC from being broken and torn.

Background

The FPC is a kind of printed circuit. The FPC is suitable for the fields of MP3, DVD, digital cameras, mobile phone medical treatment, automobiles, aerospace and the like, and has the characteristics of free bending, folding, winding, small volume, thinness, random movement, stretching and the like.

The design of the backlight FPC of the conventional liquid crystal module is that a positive circuit and a negative circuit of a welding golden finger are straight out, such as a T shape, the welding is carried out on an FPC bonding pad of an LCD of the liquid crystal module, when the FPC of the LCD of the liquid crystal module is reversely bent and fixed on an iron frame on the bottom surface of the backlight, the backlight FPC can be arched and extruded by external force, the welding position of the backlight FPC and the negative bonding pad of the FPC of the LCD is easy to break, the potential risk of the black screen of the liquid crystal module exists, meanwhile, the conventional backlight FPC does not take protection measures in the shape position of the 90-degree turn at the inner side angle, and the circuit is easy to tear in the production or rework process.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims to provide a structure for preventing FPC from being broken and torn so as to solve the technical problems that a welding part of a bonding pad is easy to break and a circuit is easy to tear.

In order to achieve the purpose, the utility model provides the following technical scheme: prevent FPC rupture tear structure, including substrate and LCD module, the bottom welding of LCD module has the substrate, the bottom of substrate is provided with the pad, the inside top of pad is connected with first connecting wire and second connecting wire through electrically conductive through-hole, the inside below of pad is provided with first golden finger and second golden finger respectively, the back of pad is provided with the department of bending respectively, first vulnerable department and the vulnerable department of second.

Furthermore, the bonding pad is T-shaped, and three right angles are arranged on the bonding pad.

Through adopting above-mentioned technical scheme, the appearance design is "T" style of calligraphy, effectively avoids the atress to bend to the welding circuit to increase the line way in the 90 degrees angular position departments of FPC appearance in a poor light, strengthen the hardness, tear the FPC circuit when preventing production or doing over again.

Furthermore, the first connecting line and the second connecting line are respectively provided with two, and the tops of the first golden finger and the second golden finger are both connected with the first connecting line and the second connecting line.

By adopting the technical scheme, when one connecting wire is broken, other lines can be electrified, and the double-line circuit plays a role in double protection.

Furthermore, the outer surfaces of the first golden finger and the second golden finger are provided with a circular tin leakage hole and a semicircular tin leakage hole.

By adopting the technical scheme, the electrode of the golden finger can be better soaked with the main FPC during welding, so that the welding sufficiency of the welding position of the flexible circuit board is effectively improved, and the firmness, the bending resistance and the reliability of the welding position of the liquid crystal display module are improved.

Furthermore, the first golden finger and the second golden finger are both made of copper materials.

By adopting the technical scheme, the conductivity is better, and the conductivity is improved.

In summary, the utility model mainly has the following beneficial effects:

1. the novel backlight FPC is designed to be T-shaped in appearance, the LCD is welded on the base material, when the FPC of the LCD is folded on an iron frame on the back of the backlight, the backlight FPC arches, and after being stressed and extruded, the backlight FPC is folded at a bending position, so that the first vulnerable part and the second vulnerable part are prevented from being broken due to stress;

2. the bonding pad of the backlight FPC is designed to be electrified by double lines, two groups of golden fingers are respectively connected with a first connecting line and a second connecting line, when one connecting line is broken, other lines can be electrified, and double lines can be protected doubly;

3. the backlight FPC is provided with a right angle, a circuit is designed along the inner side of the right angle, the appearance structure is reinforced to be hard, and the circuit is prevented from being torn due to the fact that the inner right angle is torn.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of a bonding pad of the present invention

FIG. 3 is a schematic diagram of the first connection line and the second connection line structure of the present invention

FIG. 4 is a schematic diagram of a front structure of a liquid crystal module according to the present invention;

FIG. 5 is a schematic diagram of a back structure of a liquid crystal module according to the present invention.

In the figure: 1. a substrate; 2. a pad; 3. a first golden finger; 4. a second golden finger; 5. a first connecting line; 6. a second connecting line; 7. a conductive via; 8. a circular tin leakage hole; 9. a right angle; 10. bending the part; 11. a first vulnerable site; 12. a second vulnerable site; 13. a liquid crystal module; 14. semicircular tin leakage holes.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The following describes an embodiment of the present invention based on its overall structure.

A structure for preventing FPC from being broken and torn comprises a substrate 1 and a liquid crystal module 13, wherein the substrate 1 is welded at the bottom of the liquid crystal module 13, a bonding pad 2 is arranged at the bottom of the substrate 1, the bonding pad 2 is T-shaped, three right angles 9 are arranged on the bonding pad 2, the shape is T-shaped, stress is effectively avoided from being bent to a welding circuit, a circuit line is additionally arranged at the position of 90-degree angle of the shape of a backlight FPC, the hardness is enhanced, the FPC circuit is prevented from being torn during production or rework, a first connecting wire 5 and a second connecting wire 6 are connected to the upper portion of the inside of the bonding pad 2 through a conductive through hole 7, a first golden finger 3 and a second golden finger 4 are respectively arranged below the inside of the bonding pad 2, a circular tin leakage hole 8 and a semicircular tin leakage hole 14 are arranged on the outer surfaces of the first golden finger 3 and the second golden finger 4, and the electrodes of the golden fingers can be better soldered with the main FPC, therefore, the welding sufficiency of the welding position of the flexible circuit board is effectively improved, the firmness, the bending resistance and the reliability of the welding position of the liquid crystal display module are improved, and the back of the welding pad 2 is respectively provided with a bending position 10, a first easily damaged position 11 and a second easily damaged position 12.

Referring to fig. 1-3, the first connecting line 5 and the second connecting line 6 are respectively provided with two, the top parts of the first golden finger 3 and the second golden finger 4 are both connected with the first connecting line 5 and the second connecting line 6, when one connecting line is broken, other lines can be electrified, and the double lines play a role in double protection.

Referring to fig. 1-3, the first gold finger 3 and the second gold finger 4 are made of copper material, so that the conductivity is better and the conductivity is improved.

The implementation principle of the embodiment is as follows: firstly, the staff welds substrate 1 and liquid crystal module 13 well, when the FPC of LCD is folded to the chase on the back of a light a poor light, FPC in a poor light arches, after the atress is extruded, FPC in a poor light fold in department of bending 10, avoid first vulnerable department 11 and the vulnerable department 12 of second to receive the effort and break, respectively link a first connecting wire 5 and a second connecting wire 6 on two sets of golden fingers, when a connecting wire breaks, other circuits can be according to circular telegram, FPC in a poor light is equipped with right angle department 9, prolong the inboard design circuit of right angle department 9, it is hard to strengthen the appearance structure, prevent to tear interior right angle and tear the circuit.

Although embodiments of the present invention have been shown and described, the present embodiments are merely illustrative of the present invention and are not intended to limit the present invention, and the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and those skilled in the art can make modifications, substitutions, variations, etc. of the embodiments as required without departing from the principle and spirit of the present invention, but within the scope of the claims of the present invention.

Claims

1. Prevent FPC rupture and tear structure, including substrate (1) and LCD module (13), its characterized in that: the welding of the bottom of LCD module (13) has substrate (1), the bottom of substrate (1) is provided with pad (2), the inside top of pad (2) is connected with first connecting wire (5) and second connecting wire (6) through electrically conductive through-hole (7), the inside below of pad (2) is provided with first golden finger (3) and second golden finger (4) respectively, the back of pad (2) is provided with department of bending (10), first vulnerable department (11) and the vulnerable department of second (12) respectively.

2. The structure for preventing FPC from breaking and tearing according to claim 1, wherein: the bonding pad (2) is T-shaped, and three right-angle positions (9) are arranged on the bonding pad (2).

3. The structure for preventing FPC from breaking and tearing according to claim 1, wherein: the first connecting line (5) and the second connecting line (6) are respectively provided with two, and the tops of the first golden finger (3) and the second golden finger (4) are both connected with the first connecting line (5) and the second connecting line (6).

4. The structure for preventing FPC from breaking and tearing according to claim 1, wherein: the outer surfaces of the first golden finger (3) and the second golden finger (4) are provided with a circular tin leakage hole (8) and a semicircular tin leakage hole (14).

5. The structure for preventing FPC from breaking and tearing according to claim 1, wherein: the first golden finger (3) and the second golden finger (4) are both made of copper materials.