Display module for improving binding stability

Abstract

The utility model discloses a display module for improving binding stability, which comprises liquid crystal glass and a module FPC (flexible printed circuit), a first binding area is formed on the liquid crystal glass, a second binding area corresponding to the first binding area is formed on the module FPC, the first binding area is in binding connection with the second binding area, a plurality of binding PADs arranged in parallel are formed on the second binding area, and the first binding area is connected with the second binding area. A gap is formed between every two adjacent binding PADs, the binding PADs located in the middle are middle PADs, the middle PADs are vertically arranged in the front-back direction, the front portions of the binding PADs on the two sides of the middle PADs incline towards the middle PADs, and the front width and the rear width of the same binding PADs are equal. According to the display module, the gap for binding the PAD on the liquid crystal glass and the module FPC is arranged, so that the problem of expansion and shrinkage caused in the binding process can be counteracted, correct alignment of the bound PAD can be ensured, and the binding effect and the yield of the display module are improved.

Description

Technical Field

[0001] This utility model relates to the field of display module technology, and in particular to a display module that improves bonding stability. Background Technology

[0002] A liquid crystal display module generally includes components such as liquid crystal glass (assembly), module FPC, backlight module, and driver IC. The module FPC and liquid crystal glass are bonded together, so that the bonding PADs on the module FPC and liquid crystal glass, which are vertically arranged from left to right, are electrically connected. Since the bonding process requires heating and pressurization by a pressure head, under heat, the different expansion and contraction ratios of the module FPC and liquid crystal glass will be inconsistent due to the different materials. In addition, the placement of the pressure head will affect the misalignment of the bonding PADs on the module FPC and the bonding PADs on the liquid crystal glass after bonding.

[0003] Therefore, existing technologies have shortcomings and need to be improved. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a display module that improves bonding stability.

[0005] The technical solution of this utility model is as follows: This utility model provides a display module that improves bonding stability, including: liquid crystal glass and module FPC. A first bonding area is formed on the liquid crystal glass, and a second bonding area is formed on the module FPC corresponding to the first bonding area. The first bonding area and the second bonding area are bonded together. A plurality of bonding PADs are formed on the first bonding area, and there is a gap between adjacent bonding PADs. The bonding PAD located in the middle is called the middle PAD. The middle PAD is vertically arranged in the front-back direction. The front of the bonding PADs on both sides of the middle PAD is inclined towards the middle PAD. The front width and rear width of the same bonding PAD are equal.

[0006] In the binding gaps located to the left of the middle PAD, the width in front of the rightmost binding gap is: base gap width * (1 + front expansion / contraction coefficient), the width behind the rightmost binding gap is: base gap width * (1 + rear expansion / contraction coefficient), the width in front of the non-rightmost binding gap is: the width in front of the first binding gap to its right * (1 + front expansion / contraction coefficient), and the width behind the non-rightmost binding gap is: the width behind the first binding gap to its right * (1 + rear expansion / contraction coefficient).

[0007] In the binding gaps located to the right of the middle PAD, the width in front of the leftmost binding gap is: base gap width * (1 + front expansion / contraction coefficient), the width behind the leftmost binding gap is: base gap width * (1 + rear expansion / contraction coefficient), the width in front of the binding gap not on the leftmost side is: the width in front of the first binding gap to its left * (1 + front expansion / contraction coefficient), and the width behind the binding gap not on the leftmost side is: the width behind the first binding gap to its left * (1 + rear expansion / contraction coefficient).

[0008] The front expansion / contraction coefficient is 0.0003 to 0.0005, and the rear expansion / contraction coefficient is 0.0007 to 0.0009.

[0009] Preferably, the front expansion / contraction coefficient is 0.0004.

[0010] Preferably, the rear expansion / contraction coefficient is 0.0008.

[0011] Furthermore, the display module also includes a backlight module, which is stacked on the lower layer of the liquid crystal glass.

[0012] The beneficial effects of this utility model by adopting the above solution are as follows: by setting the gap between the liquid crystal glass and the bonding PAD on the module FPC, the expansion and contraction problem caused during the bonding process can be offset, ensuring that the bonding PAD can be correctly aligned, thereby improving the bonding effect and the yield of the display module. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a display module according to an embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure at the PAD position in the middle of the first binding area according to an embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram of the structure in front of the PAD in the middle of the first binding area according to an embodiment of the present invention.

[0016] Figure 4 This is a schematic diagram of the structure behind the PAD in the middle of the first binding area according to an embodiment of the present invention. Detailed Implementation

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Please refer to the following: Figures 1 to 4In this embodiment, the present invention provides a display module for improving bonding stability, comprising: a liquid crystal glass 1 and a module FPC 2. A first bonding area is formed on the liquid crystal glass 1, and a second bonding area is formed on the module FPC 2 corresponding to the first bonding area. The first bonding area and the second bonding area are bonded together. A plurality of bonding PADs are formed on the second bonding area, with gaps between adjacent bonding PADs. The bonding PAD located in the middle is called the middle PAD. The middle PAD is vertically arranged in the front-to-back direction. The front of the bonding PADs on both sides of the middle PAD is inclined towards the middle PAD. The front width and rear width of the same bonding PAD are equal.

[0019] In the binding gaps located to the left of the middle PAD, the width in front of the rightmost binding gap is: base gap width * (1 + front expansion / contraction factor); the width behind the rightmost binding gap is: base gap width * (1 + rear expansion / contraction factor); the width in front of the non-rightmost binding gap is: the width in front of the first binding gap to its right * (1 + front expansion / contraction factor); the width behind the non-rightmost binding gap is: the width behind the first binding gap to its right * (1 + rear expansion / contraction factor). For example, please refer to... Figures 2 to 4 Arrange the binding gaps to the left of the middle PAD m0 from right to left as z1, z2, z3, ..., zn. Then, the front width zq1 of binding gap z1 is: base gap width * (1 + front expansion / contraction coefficient), and the rear width zh1 is: base gap width * (1 + rear expansion / contraction coefficient). The front width of binding gap z2 is: the front width of binding gap z1 * (1 + front expansion / contraction coefficient), and the rear width is: the rear width of binding gap y1 * (1 + rear expansion / contraction coefficient). And so on, the front width of binding gap zn is: the front width of binding gap zn-1 * (1 + front expansion / contraction coefficient), and the rear width is: the rear width of binding gap zn-1 * (1 + rear expansion / contraction coefficient).

[0020] In the binding gaps located to the right of the middle PAD, the width in front of the leftmost binding gap is: base gap width * (1 + front expansion / contraction factor); the width behind the leftmost binding gap is: base gap width * (1 + rear expansion / contraction factor); the width in front of any binding gap not on the leftmost side is: the width in front of the first binding gap to its left * (1 + front expansion / contraction factor); the width behind any binding gap not on the leftmost side is: the width behind the first binding gap to its left * (1 + rear expansion / contraction factor). For example, please continue reading. Figures 2 to 4Sort the binding gaps to the right of the middle PAD m0 from left to right as y1, y2, y3, ..., yn. Then, the front width yq1 of binding gap y1 is: base gap width * (1 + front expansion / contraction coefficient), and the rear width is: base gap width * (1 + rear expansion / contraction coefficient). The front width of binding gap y2 is: the front width of binding gap y1 * (1 + front expansion / contraction coefficient), and the rear width is: the rear width of binding gap y1 * (1 + rear expansion / contraction coefficient). And so on, the front width of binding gap yn is: the front width of binding gap yn-1 * (1 + front expansion / contraction coefficient), and the rear width is: the rear width of binding gap yn-1 * (1 + rear expansion / contraction coefficient).

[0021] In this embodiment, the front expansion coefficient is 0.0004, the rear expansion coefficient is 0.0008, the base gap width is 0.055mm, and the width of the binding PAD is 0.065mm.

[0022] In the above structure, the front of the bonding PADs on both sides of the central PAD is inclined towards the central PAD, and the further away from the central PAD, the larger the bonding gap and the more inclined the bonding PAD. This structural design can offset the adverse effects of material expansion and contraction during the bonding process, avoiding the problem of misalignment during bonding. Furthermore, the display module also includes a backlight module, which is stacked on the lower layer of the liquid crystal glass 1.

[0023] It is worth noting that in some cases, the number of bound PADs is even. In this case, the two bound PADs in the middle are both middle PADs, and the gap between the two bound PADs is the middle gap. The front width and back width of the middle gap are both the base gap width.

[0024] In summary, this solution, by setting the gap between the bonding PADs on the LCD glass and the module FPC, can offset the expansion and contraction problems caused during the bonding process, ensuring that the bonding PADs can be correctly aligned, thereby improving the bonding effect and the yield of the display module.

[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A display module for improving bonding stability, characterized in that, include: The LCD glass and the FPC module are provided. A first bonding area is formed on the LCD glass, and a second bonding area is formed on the FPC module corresponding to the first bonding area. The first bonding area and the second bonding area are bonded together. A plurality of bonding pads are formed on the first bonding area, with gaps between adjacent bonding pads. The bonding pad located in the middle is called the middle pad. The middle pad is vertically arranged in the front-to-back direction. The front of the bonding pads on both sides of the middle pad is inclined towards the middle pad. The front width and back width of the same bonding pad are equal. In the binding gaps located to the left of the middle PAD, the width in front of the rightmost binding gap is: base gap width * (1 + front expansion / contraction coefficient), the width behind the rightmost binding gap is: base gap width * (1 + rear expansion / contraction coefficient), the width in front of the non-rightmost binding gap is: the width in front of the first binding gap to its right * (1 + front expansion / contraction coefficient), and the width behind the non-rightmost binding gap is: the width behind the first binding gap to its right * (1 + rear expansion / contraction coefficient). In the binding gaps located to the right of the middle PAD, the width in front of the leftmost binding gap is: base gap width * (1 + front expansion / contraction coefficient), the width behind the leftmost binding gap is: base gap width * (1 + rear expansion / contraction coefficient), the width in front of the binding gap not on the leftmost side is: the width in front of the first binding gap to its left * (1 + front expansion / contraction coefficient), and the width behind the binding gap not on the leftmost side is: the width behind the first binding gap to its left * (1 + rear expansion / contraction coefficient). The front expansion / contraction coefficient is 0.0003 to 0.0005, and the rear expansion / contraction coefficient is 0.0007 to 0.0009.

2. The display module for improving binding stability according to claim 1, characterized in that, The expansion / contraction coefficient is 0.0004.

3. The display module for improving binding stability according to claim 1, characterized in that, The rear expansion / contraction coefficient is 0.0008.

4. The display module for improving bonding stability according to any one of claims 1 to 3, characterized in that, It also includes a backlight module, which is stacked on the lower layer of the liquid crystal glass.

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