Liquid crystal display module FPC optimized structure capable of avoiding line breakage

Abstract

The invention discloses a liquid crystal display module FPC optimized structure capable of avoiding line breakage, which comprises a module FPC, an AK bonding pad window is arranged on the back surface of the module FPC, an AK bonding pad is used for being welded on a backlight FPC, and an AK bonding pad window area is provided with a top boundary, a bottom boundary, a left side boundary and a right side boundary to form an irregular shape. The left side edge and the right side edge of the AK bonding pad are respectively provided with an empty PIN circuit pattern used for being connected with the ground end, and the front face of the module FPC is further provided with a reinforcing PI covering film used for structural reinforcement. According to the liquid crystal display module FPC optimized structure capable of avoiding circuit breakage, the strength of the bonding pad windowing position is comprehensively improved through the irregular AK bonding pad windowing area, the empty PIN circuit pattern and the reinforcing PI covering film, stress concentration can be effectively improved during bending stress, the risk of circuit breakage is reduced, and the product quality is guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of liquid crystal display modules, and in particular, relates to an optimized FPC structure of a liquid crystal display module for avoiding circuit breakage. Background Art

[0002] In the current assembly process of LCD display modules, the welding of module FPC and backlight FPC mainly relies on manual operation. During this process, the module FPC needs to undergo AK pad windowing, that is, the PI covering film on the back of the AK pad is removed to facilitate welding with the backlight FPC. However, this treatment reduces the strength of the pad windowing area. In addition, the module FPC also needs to have holes opened near the pad windowing, including mounting holes and positioning holes for installing components (such as buttons). These holes further weaken the strength of the pad windowing position. During manual welding, it is difficult to avoid touching the module FPC, causing the module to bend. If bending occurs at the pad position, it is very easy to cause circuit breakage, affecting product quality. Summary of the invention

[0003] One of the purposes of the present application is to provide an optimized FPC structure of a liquid crystal display module that avoids line breakage, so as to solve the above-mentioned technical problems.

[0004] In order to achieve the above application purpose, the technical solution adopted in this application is as follows:

[0005] The embodiment of the present application provides an optimized structure of a liquid crystal display module FPC to avoid line breakage, including: a module FPC, an AK pad window is provided on the back of the module FPC, the AK pad is used to be welded to the backlight FPC, and the AK pad window area has a top boundary, a bottom boundary, a left boundary and a right boundary;

[0006] The left and right ends of the top boundary are staggered up and down by a first size relative to the midpoint of the top boundary, the left and right ends of the bottom boundary are staggered up and down by a second size relative to the midpoint of the bottom boundary, and the left boundary and the right boundary are parallel to each other;

[0007] Empty PIN circuit patterns for connecting to the ground terminal are respectively provided on the left and right edges of the AK pad, and there is a gap between the window area of ​​the AK pad and the empty PIN circuit pattern;

[0008] A reinforcing PI covering film for structural reinforcement is also provided on the front side of the module FPC. The reinforcing PI covering film covers the side area opposite to the AK pad window area and the front area of ​​the empty PIN circuit pattern.

[0009] Optionally, a PIN pad window is also provided on the back side of the module FPC, and the PIN pad is used for soldering to the terminal device mainboard FPC, and the top edge of the PIN pad window area is wavy.

[0010] Optionally, the first size and the second size are both 0.2 mm.

[0011] Optionally, both the top border and the bottom border are wavy borders.

[0012] Optionally, the top border and the bottom border are of the same shape.

[0013] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0014] The embodiment of the present application provides an optimized structure of a liquid crystal display module FPC that avoids line breakage. Without changing the original size frame and pad design of the module FPC, the AK pad window area is designed to be an irregular shape, and the left and right ends of the top boundary are staggered by a first size relative to the midpoint of the top boundary, and the left and right ends of the bottom boundary are staggered by a second size relative to the midpoint of the bottom boundary, and the left and right boundaries are parallel to each other, thereby increasing the strength of the pad window position. Further, empty PIN circuit patterns for connecting to the ground terminal are respectively provided on the left and right edges of the AK pad, and the AK pad window area and the empty PIN circuit pattern have a gap, and the empty PIN circuit pattern further increases the strength of the pad window position. Further, a reinforcing PI covering film for structural reinforcement is also provided on the front of the module FPC, and the reinforcing PI covering film covers the opposite side area of ​​the AK pad window area and the front area of ​​the empty PIN circuit pattern, and the strength of the pad window position is further increased by reinforcing the PI covering film.

[0015] The above-mentioned optimized structure of the LCD display module FPC that avoids circuit breakage comprehensively increases the strength of the pad window position through irregular AK pad window areas, empty PIN circuit patterns, and reinforced PI covering films. It can effectively improve stress concentration when bent and subjected to force, reduce the risk of circuit breakage, and ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of a circuit diagram of an optimized structure of a FPC of a liquid crystal display module to avoid circuit breakage provided by an embodiment of the present application is shown;

[0018] Figure 2 A schematic diagram of a back window opening of an optimized structure of a liquid crystal display module FPC to avoid line breakage provided in an embodiment of the present application is shown;

[0019] Figure 3 A front view of an optimized structure of a liquid crystal display module FPC for avoiding circuit breakage provided in an embodiment of the present application is shown.

[0020] Illustration Description:

[0021] 10. Module FPC; 11. AK pad; 12. PIN pad; 21. Mounting hole; 22. Positioning hole; 30. AK pad window area; 31. Top boundary; 32. Bottom boundary; 40. PIN pad window area; 41. Top edge; 51. Empty PIN circuit pattern; 61. Reinforced PI covering film. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0026] See also Figures 1 to 3 As shown, the embodiment of the present application provides an optimized structure of a liquid crystal display module FPC to avoid line breakage, including a module FPC 10, the module FPC 10 is provided with an AK pad 11 and a PIN pad 12, and is provided with a mounting hole 21 and a positioning hole 22. Specifically, the AK pad 11 includes a positive pad A and a negative pad K.

[0027] In the embodiment of the present application, an AK pad window is provided on the back side of the module FPC 10 , the AK pad 11 is used for soldering to the backlight FPC, and the AK pad window area 30 has a top boundary 31 , a bottom boundary 32 , a left boundary and a right boundary.

[0028] The left and right ends of the top boundary 31 are staggered up and down by a first size relative to the midpoint of the top boundary 31 , the left and right ends of the bottom boundary 32 are staggered up and down by a second size relative to the midpoint of the bottom boundary 32 , and the left boundary and the right boundary are parallel to each other.

[0029] Furthermore, empty PIN circuit patterns 51 for connecting to the ground terminal are respectively provided at the left and right edges of the AK pad 11, and there is a gap between the AK pad window area 30 and the empty PIN circuit pattern 51, that is, no window is opened at the position of the empty PIN circuit pattern 51. It should be noted that when the circuit pattern is printed on the module FPC 10, the empty PIN circuit pattern 51 is printed at the same time.

[0030] like Figure 3 As shown, further, a reinforcing PI covering film 61 for structural reinforcement is provided on the front side of the module FPC 10 , and the reinforcing PI covering film 61 covers the opposite side area of ​​the AK pad window area 30 and the front area of ​​the empty PIN circuit pattern 51 .

[0031] As an example, the first dimension and the second dimension are both 0.2 mm.

[0032] As an example, both the top border 31 and the bottom border 32 are wavy borders. For example, the left half of the top border 31 is a lower semicircular arc, and the right half is an upper semicircular arc.

[0033] As an example, the top boundary 31 and the bottom boundary 32 have the same shape.

[0034] The embodiment of the present application provides an optimized structure of a liquid crystal display module FPC that avoids line breakage. Without changing the original size frame and pad design of the module FPC 10, the AK pad window area 30 is designed to be an irregular shape, and the left and right ends of the top boundary 31 are respectively staggered by a first size relative to the midpoint of the top boundary 31, and the left and right ends of the bottom boundary 32 are respectively staggered by a second size relative to the midpoint of the bottom boundary 32, and the left boundary and the right boundary are parallel to each other, thereby increasing the strength of the pad window position. Furthermore, empty PIN circuit patterns 51 for connecting to the ground terminal are respectively provided on the left and right edges of the AK pad 11, and there is a gap between the AK pad window area 30 and the empty PIN circuit pattern 51, and the strength of the pad window position is further increased by the empty PIN circuit pattern 51. Furthermore, a reinforcing PI covering film 61 for structural reinforcement is provided on the front side of the module FPC10. The reinforcing PI covering film 61 covers the opposite side area of ​​the AK pad window area 30 and the front area of ​​the empty PIN circuit pattern 51. The strength of the pad window position is further increased by reinforcing the PI covering film 61.

[0035] The optimized FPC structure of the LCD module for avoiding circuit breakage mentioned above increases the strength of the pad window position through the irregular AK pad window area 30, the empty PIN circuit pattern 51, and the reinforced PI covering film 61, which can effectively improve stress concentration when bent and subjected to stress, reduce the risk of circuit breakage, and ensure product quality.

[0036] In summary, an optimized FPC structure of a liquid crystal display module provided in an embodiment of the present application avoids stress concentration by optimizing the window structure of the FPC pad covering film, and secondly, increases the bending strength of the FPC by optimizing the matching of empty PINs by adding to the FPC routing, and finally, adds PI reinforcement to provide a double-layer protection.

[0037] In some embodiments, a PIN pad window is also provided on the back side of the module FPC 10, and the PIN pad 12 is used to be welded to the terminal device mainboard FPC. The top edge 41 of the PIN pad window area 40 is wavy, which can also enhance the strength of the PIN pad window position, reduce the risk of circuit breakage when welding to the terminal device mainboard FPC, and ensure product quality.

[0038] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An optimized structure of a liquid crystal display module FPC to avoid line breakage, characterized in that: include: A module FPC, wherein an AK pad window is provided on the back side of the module FPC, the AK pad is used for welding to the backlight FPC, and the AK pad window area has a top boundary, a bottom boundary, a left boundary and a right boundary; The left and right ends of the top boundary are staggered up and down by a first size relative to the midpoint of the top boundary, the left and right ends of the bottom boundary are staggered up and down by a second size relative to the midpoint of the bottom boundary, and the left boundary and the right boundary are parallel to each other; Empty PIN circuit patterns for connecting to the ground terminal are respectively provided on the left and right edges of the AK pad, and there is a gap between the AK pad window area and the empty PIN circuit patterns; A reinforcing PI covering film for structural reinforcement is also provided on the front side of the module FPC, and the reinforcing PI covering film covers the opposite side area of ​​the AK pad window area and the front area of ​​the empty PIN circuit pattern.

2. According to claim 1, the optimized structure of FPC for liquid crystal display module to avoid line breakage is characterized in that: A PIN pad window is also provided on the back side of the module FPC. The PIN pad is used for soldering to the terminal device mainboard FPC. The top edge of the PIN pad window area is wavy.

3. The optimized structure of FPC for liquid crystal display module to avoid line breakage according to claim 1, characterized in that: The first size and the second size are both 0.2 mm.

4. The optimized structure of FPC for liquid crystal display module to avoid line breakage according to claim 1, characterized in that: The top border and the bottom border are both wavy borders.

5. The optimized structure of FPC for liquid crystal display module to avoid line breakage according to claim 1, characterized in that: The top boundary and the bottom boundary have the same shape.

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