Display module capable of preventing FPC (Flexible Printed Circuit) welding short circuit

Abstract

The utility model discloses a display module capable of preventing FPC welding short circuit, which comprises a liquid crystal display screen and a backlight assembly, a binding area is arranged on the liquid crystal display screen, a display screen FPC is bound on the binding area, a backlight connection area is arranged on the display screen FPC, a display screen positive electrode bonding pad and a display screen negative electrode bonding pad are arranged on the backlight connection area, and the display screen positive electrode bonding pad and the display screen negative electrode bonding pad are bonded on the backlight assembly. A solder paste barrier wall is arranged between the display screen positive electrode bonding pad and the display screen negative electrode bonding pad; the backlight assembly is provided with a backlight FPC, and the backlight FPC is connected to the backlight connection area. The solder paste blocking wall is arranged between the display screen positive electrode bonding pad and the display screen negative electrode bonding pad, and solder paste on the display screen positive electrode bonding pad and solder paste on the display screen negative electrode bonding pad are blocked through the solder paste blocking wall, so that the solder paste on the display screen positive electrode bonding pad is prevented from being connected with the solder paste on the display screen negative electrode bonding pad; therefore, the risk of positive and negative electrode connection short circuit caused by solder paste flowing is reduced, and the effect of preventing FPC welding short circuit is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of display modules, in particular to a display module for preventing FPC welding short circuit. Background Art

[0002] A display module generally includes a liquid crystal display screen and a backlight module. Among them, the backlight FPC on the backlight module needs to be connected to the display screen FPC in the liquid crystal display screen by means of solder paste welding. The mobile phone main board provides corresponding voltage / current through the connector on the display screen FPC to light up the backlight and provide a light source for the liquid crystal display screen.

[0003] However, during the welding process of the backlight FPC and the display screen FPC, since the solder paste is fluid at high temperature, and the distance between the positive and negative pads of the display screen is usually about 1.0 mm, the gap is small. Therefore, there is a risk that the solder paste will connect the positive and negative poles together during the flowing process, causing a short circuit between the positive and negative poles, resulting in the backlight not being lit and the display screen not being able to display normally.

[0004] In view of the above, a display module for preventing FPC welding short circuit is proposed to reduce the risk of short circuit caused by the flow of solder paste connecting the positive and negative poles. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a display module for preventing FPC welding short circuit, thereby reducing the risk of short circuit caused by the flow of solder paste connecting the positive and negative poles.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] A display module for preventing FPC welding short circuit, comprising: a liquid crystal display screen and a backlight assembly. A bonding area is provided on the liquid crystal display screen, a display screen FPC is bonded on the bonding area, a backlight connection area is provided on the display screen FPC, a display screen positive pad and a display screen negative pad are provided on the backlight connection area, and a solder paste barrier wall is provided between the display screen positive pad and the display screen negative pad; the backlight assembly is disposed on one side of the liquid crystal display screen, and a backlight FPC is provided on the backlight assembly, and the backlight FPC is connected to the backlight connection area.

[0008] In one embodiment, the solder paste barrier wall is a solder paste barrier wall made of insulating material.

[0009] In one embodiment, the solder paste barrier wall is a white oil solder paste barrier wall.

[0010] In one embodiment, the thickness of the solder paste barrier wall is greater than or equal to the height of the solder paste on the backlight connection area.

[0011] In one embodiment, the thickness of the solder paste barrier wall is 50 μm.

[0012] In one embodiment, the solder paste barrier wall has a linear structure.

[0013] In one embodiment, alignment white oil lines are provided around the backlight connection area.

[0014] In one embodiment, the thickness of the alignment white oil line is 50 μm.

[0015] In one embodiment, the liquid crystal display screen includes a polarizer, an upper glass sheet, a lower glass sheet, and a lower polarizer stacked in sequence, and the bonding area is provided on the lower glass sheet.

[0016] In one embodiment, the backlight assembly includes a backlight bracket and backlight optical elements. An installation cavity is provided on the backlight bracket, and the backlight optical elements are accommodated in the installation cavity.

[0017] Compared with the prior art, the present utility model has at least the following advantages:

[0018] The display module for preventing FPC welding short circuit of the present utility model forms a connection between the display screen FPC and the backlight FPC by providing a display screen positive electrode pad and a display screen negative electrode pad on the backlight connection area, through the display screen positive electrode pad and the display screen negative electrode pad; at the same time, a solder paste barrier wall is provided between the display screen positive electrode pad and the display screen negative electrode pad, and the solder paste on the display screen positive electrode pad is blocked from the solder paste on the display screen negative electrode pad by the solder paste barrier wall, avoiding the connection of the solder paste on the display screen positive electrode pad and the solder paste on the display screen negative electrode pad, thereby reducing the risk of short circuit caused by the flow of solder paste and achieving the effect of preventing FPC welding short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below.

[0020] Figure 1 It is a schematic structural diagram of a display module for preventing FPC welding short circuit in an embodiment of the present utility model;

[0021] Figure 2 It is Figure 1 a partial enlarged structural schematic diagram of part A of the display module for preventing FPC welding short circuit in

[0022] Figure 3 It is Figure 1 a stacked structural schematic diagram of a backlight positive electrode pad, a backlight negative electrode pad, a display screen positive electrode pad, a display screen negative electrode pad, solder paste, and a solder paste barrier wall of the display module for preventing FPC welding short circuit in Detailed implementation manners

[0023] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings.

[0024] Please refer to Figure 1 、 Figure 2 and Figure 3 As shown, a display module for preventing short circuit in FPC soldering includes: a liquid crystal display screen and a backlight assembly. A bonding area is provided on the liquid crystal display screen, and a display screen FPC 100 is bonded on the bonding area. A backlight connection area 110 is provided on the display screen FPC 100, and a display screen positive electrode pad 111 and a display screen negative electrode pad 112 are provided on the backlight connection area 110. A solder paste barrier wall 120 is provided between the display screen positive electrode pad 111 and the display screen negative electrode pad 112; the backlight assembly is disposed on one side of the liquid crystal display screen, and a backlight FPC 200 is provided on the backlight assembly, and the backlight FPC 200 is connected to the backlight connection area 110.

[0025] It should be noted that a backlight positive electrode pad 210 and a backlight negative electrode pad 220 are also provided on the backlight FPC 200. The backlight positive electrode pad 210 is correspondingly connected to the display screen positive electrode pad 111, and the backlight negative electrode pad 220 is correspondingly connected to the display screen negative electrode pad 112; by providing the solder paste barrier wall 120 between the display screen positive electrode pad 111 and the display screen negative electrode pad 112, the solder paste 140 on the display screen positive electrode pad 111 is blocked from the solder paste 140 on the display screen negative electrode pad 112 by the solder paste barrier wall 120. In this way, when the backlight FPC 200 and the display screen FPC 100 are soldered, before the solder paste 140 is cured, the overflow of the solder paste 140 can be blocked to a certain extent, and the solder paste 140 on the display screen positive electrode pad 111 is prevented from being connected to the solder paste 140 on the display screen negative electrode pad 112, thereby reducing the risk of short circuit caused by the flow of the solder paste 140 and playing a role in preventing short circuit in FPC soldering.

[0026] Preferably, the solder paste barrier wall 120 is a solder paste barrier wall 120 made of an insulating material. For example, preferably, the solder paste barrier wall 120 is a white oil solder paste barrier wall 120. Since in the process of FPC production, it is usually necessary to set corresponding white oil marks or white two-dimensional codes, etc., in the process of making the white oil mark or white two-dimensional code, the white oil solder paste barrier wall 120 can be processed synchronously, so that no additional processing process is required, and the production efficiency is improved.

[0027] Preferably, the thickness of the solder paste barrier wall 120 is greater than or equal to the height of the solder paste 140 on the backlight connection area 110. In this way, the flow of the solder paste 140 over the solder paste barrier wall 120 can be avoided. In addition, the height of the solder paste barrier wall 120 can be adjusted and verified according to the flow amount of the solder paste 140. Preferably, the thickness of the solder paste barrier wall 120 is 50 μm.

[0028] Preferably, the solder paste barrier wall 120 has a linear structure. And the set length of the solder paste barrier wall 120 needs to be greater than the set length of the solder paste 140, so as to better play the role of blocking the flow of the solder paste 140.

[0029] In an embodiment, an alignment white oil line 130 is provided around the backlight connection area 110. Through the alignment white oil line 130, it is convenient for the corresponding equipment to perform mark alignment when processing the pads or applying the solder paste 140 on the backlight connection area 110.

[0030] Preferably, the thickness of the alignment white oil line 130 is 50 μm.

[0031] Specifically, the liquid crystal display screen includes a polarizer, an upper glass sheet, a lower glass sheet, and a lower polarizer stacked in sequence, and the bonding area is provided on the lower glass sheet. The upper glass sheet is a CF glass, and the lower glass sheet is a TFT glass.

[0032] Specifically, the backlight assembly includes a backlight bracket and backlight optical elements. An installation cavity is provided on the backlight bracket, and the backlight optical elements are accommodated in the installation cavity. The backlight optical elements include an upper brightness enhancement film, a lower brightness enhancement film, a diffusion film, a light guide plate, a reflection film, etc. At the same time, an LED lamp is provided on the backlight FPC 200 to provide light source through the LED lamp.

[0033] The above embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A display module for preventing FPC welding short circuit, characterized in that: include: A liquid crystal display screen, wherein a binding area is provided on the liquid crystal display screen, a display screen FPC is bound to the binding area, a backlight connection area is provided on the display screen FPC, a display screen positive electrode pad and a display screen negative electrode pad are provided on the backlight connection area, and a solder paste barrier wall is provided between the display screen positive electrode pad and the display screen negative electrode pad; and A backlight assembly is arranged on one side of the liquid crystal display screen, and a backlight FPC is arranged on the backlight assembly, and the backlight FPC is connected to the backlight connection area.

2. The display module for preventing FPC welding short circuit according to claim 1, characterized in that: The solder paste barrier wall is a solder paste barrier wall made of insulating material.

3. The display module for preventing FPC welding short circuit according to claim 2, characterized in that: The solder paste barrier wall is a white oil solder paste barrier wall.

4. The display module for preventing FPC welding short circuit according to claim 1, characterized in that: The thickness of the solder paste barrier wall is greater than or equal to the height of the solder paste on the backlight connection area.

5. The display module for preventing FPC welding short circuit according to claim 4, characterized in that: The thickness of the solder paste barrier wall is 50 μm.

6. The display module for preventing FPC welding short circuit according to claim 1, characterized in that: The solder paste barrier wall is a linear structure.

7. The display module for preventing FPC welding short circuit according to claim 1, characterized in that: An alignment white oil line is arranged around the backlight connection area.

8. The display module for preventing FPC welding short circuit according to claim 7, characterized in that: The thickness of the alignment white oil line is 50 μm.

9. The display module for preventing FPC welding short circuit according to claim 1, characterized in that: The liquid crystal display screen comprises an upper polarizer, an upper glass, a lower glass and a lower polarizer which are stacked in sequence, and the binding area is arranged on the lower glass.

10. The display module for preventing FPC welding short circuit according to claim 1, characterized in that: The backlight assembly comprises a backlight bracket and a backlight optical element. The backlight bracket is provided with a mounting cavity, and the backlight optical element is accommodated in the mounting cavity.

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