A display module FPC with extra-long binding position
By adding high-temperature-resistant transparent PET base film and reinforcement mesh to the display module FPC, and applying high-temperature peelable pressure-sensitive adhesive, the problems of deterioration in the flatness of the FPC and PIN foot offset of the high-resolution display module FPC are solved, achieving higher binding accuracy and yield.
Patent Information
- Application Number
- CN202421333926.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-12
AI Technical Summary
When the existing technology is matched with a high-resolution display module, the binding positioning of the FPC is longer, resulting in poor flatness. When ACF is bound, it is easy to have PIN pin deviation, resulting in poor functions and material loss. The existing solutions are poor and time-consuming and labor-intensive.
A display module FPC with ultra-long binding positioning is designed, using an FPC body with a high-temperature-resistant transparent PET base film. A reinforcement net is installed in the PET base film. A high-temperature peelable pressure-sensitive adhesive is attached to the FPC body to ensure the flatness of the PET base film, thereby ensuring the flatness and binding accuracy of the FPC body.
Through the combination of PET base film and reinforcement network, the flatness and binding accuracy of the FPC body are improved, the occurrence of PIN pin deviation is reduced, the binding yield is improved, and the normal use of the FPC body is not affected after stripping.
Smart Images
Figure CN222736356U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of display module FPC, in particular to a display module FPC with an ultra-long binding position. Background Art
[0002] A display module is a component that assembles liquid crystal display devices, connectors, peripheral circuits such as control and drive, FPC circuit boards, backlight sources, structural parts, etc. It has a simple and fast interface connection and can quickly display the desired content on the screen through standardized signal input methods. Generally speaking, display screen modules can support signal input in multiple formats.
[0003] As the resolution of display modules increases, the number of driver ICs required to match the display modules will increase accordingly. High-resolution display modules with two Source ICs generally use a single-chip FPC + one-time ACF binding solution, which will result in a longer binding position, resulting in a larger size of the corresponding binding position of the FPC. In order to facilitate assembly, the non-wiring area of the FPC in the bending area can be hollowed out, but after the FPC is hollowed out, the flatness of the binding position FPC will deteriorate due to the smaller force-bearing area. When ACF is bound, the PIN pin is likely to be offset, which will eventually lead to poor function and material loss. Current technology does not have a good solution to this problem. Usually, the unevenness of the FPC is smoothed manually, which is ineffective and time-consuming and labor-intensive. Utility Model Content
[0004] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a display module FPC with extra-long binding positions, comprising an FPC body and a plurality of gold finger ends arranged on the top of the FPC body, a leveling component being laterally arranged on the substrate at the top of the back side of the FPC body; the leveling component comprising a pressure-sensitive adhesive, a PET base film and a reinforcing net, one side of the pressure-sensitive adhesive being fixedly adhered to the PET base film, the PET base film being attached to the substrate of the FPC body and close to the gold finger end through the pressure-sensitive adhesive, and the reinforcing net being arranged in the inner cavity of the PET base film.
[0006] As a further solution of the utility model: the pressure-sensitive adhesive is a high-temperature peelable pressure-sensitive adhesive, the PET base film is a high-temperature resistant transparent PET film, and the length and width of the PET base film are the same as those of the pressure-sensitive adhesive.
[0007] As a further solution of the utility model: the reinforcing mesh is woven from a plurality of steel wires or copper wires, and the reinforcing mesh is evenly laid in the inner cavity of the PET base film.
[0008] As a further solution of the utility model: the left and right sides of the leveling component extend to the edge positions close to the left and right sides of the FPC body respectively, and the surface of the leveling component is in a flat state.
[0009] As a further solution of the utility model: a rectangular hollow area is provided on the surface of the FPC body near the leveling component, the left and right sides of the hollow area are at the same distance from the edges of the left and right sides of the FPC body, and a layer of polyimide is fixed in a rectangular shape on the inner wall of the hollow area.
[0010] As a further solution of the utility model: the back of the FPC body is provided with component area 1, component area 2, component area 3 and component area 4 for installing components, the component area 1, component area 2 and component area 3 are arranged on the left side of the back of the FPC body and are spaced apart from each other, and the component area 4 is arranged on the right side of the back of the FPC body.
[0011] As a further solution of the utility model: the front side of the FPC body is provided with FR4 reinforcement plate 1, FR4 reinforcement plate 2, steel sheet reinforcement plate 1 and steel sheet reinforcement plate 2.
[0012] As a further solution of the utility model: the position of the FR4 reinforcement plate one corresponds to the position of component area four, the position of the FR4 reinforcement plate two corresponds to the position of component area three, the position of the steel sheet reinforcement plate one corresponds to the position of component area two, and the position of the steel sheet reinforcement plate two corresponds to the position of component area one.
[0013] As a further solution of the present invention: the thicknesses of the FR4 reinforcement plate 1, the FR4 reinforcement plate 2, the steel sheet reinforcement plate 1 and the steel sheet reinforcement plate 2 are all the same.
[0014] As a further solution of the utility model: a copper leakage area is also arranged on the back side of the FPC body and near the bottom, and the copper leakage area is far away from the steel sheet reinforcement plate.
[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0016] In the present application, a high-temperature resistant transparent PET base film is attached to the back of the FPC body through a designed leveling component, and a reinforcing net is arranged in the PET base film, so as to enhance the toughness and regularity of the PET base film and ensure the flatness of the PET base film. The PET base film and the FPC body are attached by high-temperature peeling pressure-sensitive adhesive. Finally, the PET base film and the FPC body are attached to each other, so as to ensure the flatness of the FPC body during binding by keeping the PET base film flat all the time, thereby improving the binding accuracy and yield. After the FPC body is bound, the PET film and the pressure-sensitive adhesive are peeled off, so as not to affect the normal use of the FPC body. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a rear view structural diagram of the FPC body of the utility model;
[0018] Figure 2 This is a front view structural diagram of the FPC body of the utility model;
[0019] Figure 3 It is a side view structural diagram of the FPC body of the utility model;
[0020] Figure 4 It is a side sectional structural schematic diagram of the leveling assembly of the utility model;
[0021] Figure 5 It is a front view structural schematic diagram of the reinforcing net of the utility model.
[0022] The reference numerals and names in the figures are as follows:
[0023] 1. FPC body; 2. Leveling component; 201. Pressure-sensitive adhesive; 202. PET base film; 2021. Reinforcement mesh; 3. Hollow area; 4. Component area 1; 5. Component area 2; 6. Component area 3; 7. Component area 4; 8. Gold finger end; 9. FR4 reinforcement board 1; 10. FR4 reinforcement board 2; 11. Steel sheet reinforcement board 1; 12. Steel sheet reinforcement board 2; 13. Copper leakage area. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] See also Figure 1-5A display module FPC with an extra-long binding position includes an FPC body 1 and a plurality of gold finger ends 8 arranged on the top of the FPC body 1. A leveling component 2 is horizontally arranged on the substrate at the top of the back of the FPC body 1. The left and right sides of the leveling component 2 extend to the edge positions close to the left and right sides of the FPC body 1 respectively, and the surface of the leveling component 2 is in a flat state; the leveling component 2 includes a pressure-sensitive adhesive 201, a PET base film 202 and a reinforcing net 2021. One side of the pressure-sensitive adhesive 201 is fixedly adhered to the PET base film 202. The PET base film 202 is attached to the substrate of the FPC body 1 through the pressure-sensitive adhesive 201 and close to the gold finger. End 8, the reinforcing net 2021 is arranged in the inner cavity of the PET base film 202, and a copper leakage area 13 is also arranged on the back side of the FPC body 1 and near the bottom. The copper leakage area 13 is far away from the steel sheet reinforcement plate 11. The reinforcing net 2021 is arranged in the PET base film 202, so that the strength of the reinforcing net 2021 can be used to improve the strength of the PET base film 202, avoid wrinkles and unevenness during use, and ensure the flattening effect of the PET base film 202 on the FPC body 1. In addition, this method only needs to stick the PET base film 202 on the FPC body 1. This method has a better leveling effect and saves time and effort.
[0026] See also Figure 3-5 In this embodiment, the pressure-sensitive adhesive 201 is a high-temperature peelable pressure-sensitive adhesive, and the PET base film 202 is a high-temperature resistant transparent PET film. The length and width of the PET base film 202 are the same as those of the pressure-sensitive adhesive 201.
[0027] Specifically, the pressure-sensitive adhesive 201 has a strong adhesion effect at room temperature and can be easily peeled off at high temperature. The PET base film 202 has the same shape and structure as the pressure-sensitive adhesive 201, so the FPC body 1 can be better leveled by utilizing the cooperation between the PET base film 202 and the pressure-sensitive adhesive 201.
[0028] See also Figure 4-5 In this embodiment, the reinforcing mesh 2021 is woven from a plurality of steel wires or copper wires, and the reinforcing mesh 2021 is evenly laid in the inner cavity of the PET base film 202 .
[0029] Specifically, a plurality of steel wires or copper wires are woven into the reinforcing mesh 2021 , so that the toughness and strength of the steel wires or copper wires themselves can be utilized to enhance the strength of the entire reinforcing mesh 2021 after molding, thereby providing the PET base film 202 with good toughness and flatness.
[0030] See also Figure 1-2In this embodiment, a rectangular hollow area 3 is provided on the surface of the FPC body 1 and close to the leveling component 2. The left and right sides of the hollow area 3 are at the same distance from the edges of the left and right sides of the FPC body 1. A layer of polyimide is fixed in a rectangular shape on the inner wall of the hollow area 3.
[0031] Specifically, the hollow area 3 is opened in the non-routing area of the FPC body 1, which does not affect the routing on the FPC body 1. The purpose of setting the hollow area 3 is to reduce consumables on the one hand, and on the other hand, it is conducive to the bending of the FPC body 1 from the hollow area 3. Polyimide is set on the inner wall of the hollow area 3, so that the inner wall edge of the hollow area 3 has high temperature resistance and insulation performance.
[0032] See also Figure 1-2 In this embodiment, the back side of the FPC body 1 is provided with component area 1 4, component area 2 5, component area 3 6 and component area 4 7 for installing components. Component area 1 4, component area 2 5 and component area 3 6 are arranged on the left side of the back side of the FPC body 1 and are spaced apart from each other, and component area 4 7 is arranged on the right side of the back side of the FPC body 1.
[0033] Specifically, a plurality of component areas are arranged at different positions on the back side of the FPC body 1 , so that different components can be installed in the corresponding component areas, and it can be ensured that the components in each component area are spaced apart from each other.
[0034] See also Figure 1-2 In this embodiment, the front of the FPC body 1 is provided with a FR4 reinforcing plate 9, a FR4 reinforcing plate 10, a steel sheet reinforcing plate 11 and a steel sheet reinforcing plate 12; the position of the FR4 reinforcing plate 9 corresponds to the position of the component area 4 7, the position of the FR4 reinforcing plate 10 corresponds to the position of the component area 3 6, the position of the steel sheet reinforcing plate 11 corresponds to the position of the component area 2 5, and the position of the steel sheet reinforcing plate 2 12 corresponds to the position of the component area 1 4; the thicknesses of the FR4 reinforcing plate 9, the FR4 reinforcing plate 10, the steel sheet reinforcing plate 11 and the steel sheet reinforcing plate 2 12 are all the same.
[0035] Specifically, by arranging FR4 reinforcement plate 1 9, FR4 reinforcement plate 2 10, steel sheet reinforcement plate 1 11 and steel sheet reinforcement plate 2 12 on the back of different component areas, the strength and flatness of the corresponding component areas can be enhanced to ensure the normal operation of the components on each component area.
[0036] When in use, the PET base film 202 with the pressure-sensitive adhesive 201 is first adhered to the substrate on the top of the back of the FPC body 1, so that the flat state of the top of the FPC body 1 is ensured by using the flat state of the PET base film 202, and then the FPC body 1 is hollowed out to form the hollow area 3;
[0037] When binding the FPC body 1, since the top of the FPC body 1 is always kept flat by the flat state of the PET base film 202, the PIN pin will not be offset during binding, ultimately ensuring the normal function after binding. After the binding is completed, the pressure-sensitive adhesive 201 can be removed from the FPC body 1 using a high-temperature pressure head. Under the high temperature of the pressure head, the adhesion will deteriorate. After the binding is completed, the PET base film 202 with the pressure-sensitive adhesive 201 can be easily peeled off from the FPC body 1.
[0038] It should be noted that a PET base film 202 with a pressure-sensitive adhesive 201 is affixed to the back of the FPC body 1 (PET has strong mechanical properties and is resistant to high temperatures and can be used as a temporary reinforcement) to ensure the flatness of the FPC body 1; and the pressure-sensitive adhesive 201 has strong adhesion at room temperature and can firmly fix the FPC body 1 and the PET base film 202.
[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A display module FPC with an extra-long binding position, characterized in that: It comprises an FPC body (1) and a plurality of gold finger ends (8) arranged on the top of the FPC body (1), wherein a flattening component (2) is arranged horizontally on the substrate at the top of the back side of the FPC body (1); The leveling component (2) comprises a pressure-sensitive adhesive (201), a PET base film (202) and a reinforcing net (2021); one side of the pressure-sensitive adhesive (201) is fixedly adhered to the PET base film (202); the PET base film (202) is attached to the substrate of the FPC body (1) and close to the gold finger end (8) through the pressure-sensitive adhesive (201); and the reinforcing net (2021) is arranged in the inner cavity of the PET base film (202).
2. The display module FPC with an extra-long binding position according to claim 1, characterized in that: The pressure-sensitive adhesive (201) is a high-temperature peelable pressure-sensitive adhesive, the PET base film (202) is a high-temperature resistant transparent PET film, and the length and width of the PET base film (202) are the same as the length and width of the pressure-sensitive adhesive (201).
3. The display module FPC with an extra-long binding position according to claim 1, characterized in that: The reinforcing mesh (2021) is woven from a plurality of steel wires or copper wires, and the reinforcing mesh (2021) is evenly laid in the inner cavity of the PET base film (202).
4. The display module FPC with an extra-long binding position according to claim 1, characterized in that: The left and right sides of the leveling component (2) respectively extend to the edge positions close to the left and right sides of the FPC body (1), and the surface of the leveling component (2) is in a flat state.
5. The display module FPC with an extra-long binding position according to claim 1, characterized in that: A rectangular hollow area (3) is also provided on the surface of the FPC body (1) near the leveling component (2); the left and right sides of the hollow area (3) are at the same distance from the left and right edges of the FPC body (1); and a layer of polyimide is fixed in a rectangular shape on the inner wall of the hollow area (3).
6. The display module FPC with an extra-long binding position according to claim 1, characterized in that: The back of the FPC body (1) is provided with a component area 1 (4), a component area 2 (5), a component area 3 (6) and a component area 4 (7) for mounting components. The component area 1 (4), the component area 2 (5) and the component area 3 (6) are arranged on the left side of the back of the FPC body (1) and are spaced apart from each other, and the component area 4 (7) is arranged on the right side of the back of the FPC body (1).
7. The display module FPC with an extra-long binding position according to claim 1, characterized in that: The front side of the FPC body (1) is provided with a FR4 reinforcing plate 1 (9), a FR4 reinforcing plate 2 (10), a steel sheet reinforcing plate 1 (11) and a steel sheet reinforcing plate 2 (12).
8. The display module FPC with an extra-long binding position according to claim 7, characterized in that: The position of the FR4 reinforcement plate one (9) corresponds to the position of the component area four (7), the position of the FR4 reinforcement plate two (10) corresponds to the position of the component area three (6), the position of the steel sheet reinforcement plate one (11) corresponds to the position of the component area two (5), and the position of the steel sheet reinforcement plate two (12) corresponds to the position of the component area one (4).
9. The display module FPC with an extra-long binding position according to claim 7, characterized in that: The thicknesses of the FR4 reinforcing plate 1 (9), the FR4 reinforcing plate 2 (10), the steel sheet reinforcing plate 1 (11) and the steel sheet reinforcing plate 2 (12) are all the same.
10. The display module FPC with an extra-long binding position according to claim 1, characterized in that: A copper leakage area (13) is also provided on the back side of the FPC body (1) and near the bottom, and the copper leakage area (13) is far away from the steel sheet reinforcing plate 1 (11).