High-reliability display module
By setting up a reinforcement layer in the interface area and bending area of the module FPC, the tearing and glue spilling problems of the module FPC are solved, and the reliability and waterproof performance of the display module are improved.
Patent Information
- Application Number
- CN202422450384.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The module FPC of existing LCD displays is prone to tear and ACF overflow problems in the binding interface area and the bent area, resulting in low reliability of the display module.
The reinforcement layer is provided on the binding surface of the module FPC to cover both sides of the interface area and the bent area. The reinforcement layer material is the same as the covering film, forming an integrated structure, with a width of 3mm-5mm and a thickness of 55%-75% of the ACF thickness, and does not cover the positioning MARK.
It improves the anti-bending tear performance of the module, avoids ACF overflow problems, enhances the reliability of the display module and prevents water vapor intrusion.
Smart Images
Figure CN223167005U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of display modules, and particularly relates to a display module with high reliability. Background Art
[0002] Existing liquid crystal display screens generally include components such as liquid crystal display glass, driving ICs, module FPCs, and backlight modules. Among them, under the conventional structure, the backlight module is arranged under the liquid crystal display glass to provide backlight. The module FPC is bonded and connected to the liquid crystal display module through ACF (anisotropic conductive film). Since the module FPC needs to be bent and attached to the back of the backlight module, in order to reduce stress, generally, the bonding interface area and the bending area are designed with a single layer, that is, there is only one copper layer and a green oil layer is covered on it. The current such structure has the following problems, resulting in low reliability of the display module: 1. After the module FPC is bonded, during the processes of bending, assembling, etc., since the bonding interface area and the bending area are relatively thin, tearing problems are likely to occur; 2. After the module FPC is bonded, the ACF is prone to the problem of left and right overflow glue, and cleaning is required.
[0003] Therefore, there are defects in the existing technology and improvement is needed. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome at least some deficiencies of the existing technology and provide a display module with high reliability.
[0005] The technical solution of the utility model is as follows: The utility model provides a display module with high reliability, including: liquid crystal display glass and module FPC. A single-layer area is formed on the module FPC. The single-layer area includes a connected interface area and a bending area. The interface area includes a PIN area. A plurality of bonding PINs are provided on the PIN area. Positioning MARKs are respectively provided on both sides of the PIN area. The module FPC is bonded and connected to the liquid crystal display glass through ACF. On the bonding surface of the module FPC, reinforcing layers are respectively arranged on both side edges of the interface area and the bending area, and the reinforcing layers do not cover the corresponding positioning MARKs. The outer edge of the reinforcing layer is flush with the outer edge of the copper layer of the module FPC.
[0006] Further, the material of the reinforcing layer is the same as that of the covering film of the module FPC, and the reinforcing layer is connected with the covering film of the double-layer area of the module FPC at the corresponding position into an integral structure.
[0007] Further, the material of the reinforcing layer and the covering film of the module FPC are both PI.
[0008] Further, the width of the reinforcing layer is 3mm - 5mm.
[0009] Further, the distance between the edge of the reinforcing layer and the corresponding positioning MARK is 0.15 mm - 0.3 mm.
[0010] Further, the thickness of the reinforcing layer is 55% - 75% of the thickness of the ACF, which can achieve a good anti-glue overflow effect.
[0011] Adopting the above solution, the beneficial effects of the present utility model are as follows: By providing a reinforcing layer, the anti-bending and tearing performance of the single-layer area is improved, and the problem of edge tearing in the unilateral area can be avoided; Since the reinforcing layer has a certain thickness, it can block the ACF during binding and prevent the occurrence of glue overflow on both sides; The reinforcing area can block water vapor from invading the binding area from both sides, effectively improving the reliability of the display module. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.
[0013] Figure 2 It is a schematic structural diagram of the reinforcing area on the left side of the module FPC of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] The following will combine the drawings and specific embodiments to describe the present utility model in detail.
[0015] Please refer to Figure 1 and Figure 2 , in this embodiment, the present utility model provides a highly reliable display module, including: a liquid crystal display glass 2 and a module FPC 1. A single-layer area 11 is formed on the module FPC 1. The single-layer area 11 includes a connected interface area 111 and a bending area 112. The interface area 111 includes a PIN area. A plurality of binding PINs (pads) 1111 are provided on the PIN area. Positioning MARKs (marks) 1112 are respectively provided on both sides of the PIN area. The module FPC 1 is bound and connected to the liquid crystal display glass 2 through an ACF (anisotropic conductive film). On the binding surface of the module FPC 1, reinforcing layers 13 are respectively provided on both side edges of the interface area 111 and the bending area 112, and the reinforcing layers 13 do not cover the corresponding positioning MARKs 1112. The outer edge of the reinforcing layer 13 is flush with the outer edge of the copper layer of the module FPC 1.
[0016] Further, in this embodiment, the material of the reinforcing layer 13 is the same as that of the cover film of the module FPC 1. The reinforcing layer 13 is connected to the cover film of the double-layer area 12 of the module FPC 1 at the corresponding position to form an integral structure, so as to Figure 2For example, in the illustration, area A of the figure is the part of the reinforcement layer 13 located in the interface area 111, area B is the part of the reinforcement layer 13 located in the bending area 112, and area C is the cover film of the double-layer area 12 of the module FPC 1. Areas A, B, and C are an integral structure. This structural form facilitates the setting of the reinforcement layer 13 during the processing of the module FPC 1 and can also make the force more uniform after the module FPC 1 is bent.
[0017] Further, in this embodiment, the material of the reinforcement layer 13 and the material of the cover film of the module FPC 1 are both PI (polyimide).
[0018] Further, in this embodiment, the width W of the reinforcement layer 13 is 5 mm, which can ensure the corresponding anti-tearing ability and also avoid being too wide to affect bending.
[0019] Further, in this embodiment, the distance between the edge of the reinforcement layer 13 and the corresponding positioning MARK 1112 is 0.2 mm. When setting the ACF, the ACF covers the positioning MARK 1112, and when binding, the ACF can deform to the reinforcement layer 13 due to pressure on both sides.
[0020] Further, in this embodiment, the thickness of the reinforcement layer 13 is 12.5 um, and the thickness of the ACF is 18 um, which can achieve a good anti-bleeding effect.
[0021] Further, the solution further includes a backlight module, which is arranged under the liquid crystal display glass 2, and the module FPC 1 is attached to the back of the backlight module after being bent.
[0022] In summary, the beneficial effects of this solution are as follows: by setting the reinforcement layer, the anti-bending and anti-tearing performance of the single-layer area is improved, and the problem of edge tearing in the unilateral area can be avoided; since the reinforcement layer has a certain thickness, it can block the ACF during binding and avoid the occurrence of bleeding on both sides; the reinforcement area can block water vapor from invading the binding area from both sides, effectively improving the reliability of the display module.
[0023] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A highly reliable display module, comprising: Liquid crystal display glass and module FPC. A single-layer area is formed on the module FPC. The single-layer area includes a connected interface area and a bending area. The interface area includes a PIN area. A number of bonding PINs are provided on the PIN area. Positioning MARKs are respectively provided on both sides of the PIN area. The module FPC is bonded and connected to the liquid crystal display glass through ACF. It is characterized in that on the bonding surface of the module FPC, strengthening layers are respectively provided on both side edges of the interface area and the bending area, and the strengthening layers do not cover the corresponding positioning MARKs, and the outer edges of the strengthening layers are flush with the outer edges of the copper layer of the module FPC.
2. The highly reliable display module according to claim 1, wherein The material of the strengthening layer is the same as that of the cover film of the module FPC, and the strengthening layer is connected to the cover film of the double-layer area of the module FPC at the corresponding position to form an integral structure.
3. The highly reliable display module according to claim 2, wherein The material of the strengthening layer and the cover film of the module FPC is both PI.
4. The highly reliable display module according to any one of claims 1 to 3, characterized in that, The width of the strengthening layer is 3 mm - 5 mm.
5. The highly reliable display module according to any one of claims 1 to 3, characterized in that The distance from the edge of the strengthening layer to the corresponding positioning MARK is 0.15 mm - 0.3 mm.
6. The highly reliable display module according to any one of claims 1 to 3, characterized in that, The thickness of the strengthening layer is 55% - 75% of the thickness of the ACF.