FPC binding structure

Abstract

The utility model discloses an FPC binding structure, which comprises an FPC main body and a display module, one end of the FPC main body is provided with a first binding position, the other end of the FPC main body is provided with a connecting part, the display module is provided with a second binding position, and the first binding position and the second binding position are bound and pressed through an ACF. And the upper surface of the FPC main body protrudes out of the second binding position and is provided with a connection assisting part. According to the FPC binding structure provided by the utility model, through the FPC design of the lengthened binding position, after the golden finger of the FPC main body is overlapped and bound with the ITO PAD on the lower glass substrate, the distance of the edge is increased by the connection assisting part of the lengthened FPC main body above the golden finger, and the ITO wiring of the glass is protected after the golden finger is bound and pressed with the lower glass substrate through the ACF; therefore, the requirement of front dispensing can be cancelled, the technological process and materials are saved, and the binding efficiency and the reliability of the product are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of FPC binding, in particular to an FPC binding structure. Background Art

[0002] With the rapid development of the electronic industry and information technology, as an important component of electronic products, touch screens have been applied in more and more products, and the production industry has also developed rapidly, being widely used in products such as mobile phones, digital cameras, in-vehicle displays, etc. And FPC is an important component of touch screens. When installing a touch screen, the FPC needs to be bent and connected and bound to the main board or other components.

[0003] FPC, also known as flexible printed circuit board, flexible printed circuit, or flexible circuit board, is abbreviated as flexible board or FPC. It has the characteristics of high wiring density, light weight, and thin thickness. The basic process of the current FPC binding process is, as Figure 1 and Figure 2 shown, after the FPC111 is bound to the display screen 114, since the upper surfaces are flush, it is necessary to apply positive protection glue 113 to prevent the ITO trace 112 from being corroded, thereby playing a protective role. However, such a glue application method not only has a high cost but also low efficiency. Summary of the Utility Model

[0004] Based on this, in view of the above technical problems, it is necessary to provide an FPC binding structure. Through the design of the FPC with an extended binding position, when the gold fingers of the FPC main body coincide and are bound with the ITO PAD on the lower glass substrate, the auxiliary connection part of the FPC main body above the gold fingers increases the distance from the edge. After being bound and pressed with the lower glass substrate through ACF, it plays a role in protecting the ITO trace of the glass, so as to meet the requirement of canceling the positive glue application, save the process flow and materials, and improve the binding efficiency and the reliable performance of the product.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An FPC binding structure includes:

[0007] An FPC main body and a display module. One end of the FPC main body is provided with a first binding position, the other end of the FPC main body is provided with a connection part, the display module is provided with a second binding position, the first binding position and the second binding position are bound and pressed through ACF, and the upper surface of the FPC main body protrudes from the second binding position and forms an auxiliary connection part.

[0008] Further, the first binding position is provided with gold fingers, the auxiliary connection part is the width between the upper surface of the FPC main body and the gold fingers, the second binding position is provided with ITO PAD, and the gold fingers are electrically connected to the ITO PAD.

[0009] Further, the width of the assisting connection part between the upper surface of the FPC main body and the gold fingers is 0.12 - 0.18 millimeters.

[0010] Further, the display module includes a polarizer, an upper glass substrate, a lower glass substrate, and a lower polarizer connected in sequence. A liquid crystal cell is arranged between the upper glass substrate and the lower glass substrate, and the ITOPAD is arranged on the lower glass substrate.

[0011] Further, the assisting connection part is made of non - conductive material and is integrally formed with the FPC main body.

[0012] Further, a tearing handle is arranged on the front surface of the FPC main body.

[0013] Further, reinforcing ends are arranged on the left and right sides of the gold fingers, and the reinforcing ends are used to increase the pulling force between the FPC main body and the display module.

[0014] Further, there are two reinforcing ends, and the two reinforcing ends are symmetrically arranged on the left and right sides of the interface end of the gold fingers.

[0015] Further, the reinforcing end is a cross - shaped reinforcing point.

[0016] Further, the thickness of the FPC main body is 90 - 110 microns, and the lower glass substrate is DITO glass.

[0017] Compared with the prior art, the present utility model has the following beneficial effects:

[0018] For the FPC binding structure provided by the present utility model, the display module is an LCD screen. The LCD screen is provided with a light - emitting liquid crystal cell and a second binding position. A plurality of light - emitting units are arranged in the light - emitting liquid crystal cell. The second binding position is located on the lower glass substrate and on one side of the light - emitting units, and the ITOPAD is arranged on the lower glass substrate. The light - emitting units are electrically connected to the gold fingers on the corresponding first binding position through the ITOPAD. The FPC main body is connected to an external power main board through a connection part to supply power to the light - emitting units so that the display module works.

[0019] For the FPC binding structure provided by the present utility model, by adding a cross - shaped reinforcing end on each side of the first binding position of the FPC main body, this shape increases the adhesion area after binding and improves the pulling force of the FPC main body.

[0020] The FPC bonding structure provided by the present utility model, through the design of the FPC with an extended bonding position, when the gold fingers of the FPC body coincide and are bonded with the ITOPAD on the lower glass substrate, the auxiliary connection part of the extended FPC body above the gold fingers increases the distance from the edge, and after being bonded and pressed with the lower glass substrate through ACF, it plays a role in protecting the ITO traces of the glass, so as to meet the requirement of canceling the front dispensing, saving the process flow and materials, and improving the bonding efficiency and the reliable performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of an existing FPC;

[0022] Figure 2 is a schematic diagram of an existing FPC bonding structure;

[0023] Figure 3 is a front view structural schematic diagram of the FPC bonding structure provided by the present utility model;

[0024] Figure 4 is a front view structural schematic diagram of the FPC provided by the present utility model;

[0025] Figure 5 provided by the present utility model Figure 3 is an enlarged schematic diagram of part A in

[0026] Figure 6 is a structural schematic diagram of the display module provided by the present utility model.

[0027] The markings in the figures are explained as follows:

[0028] 1. FPC body; 2. First bonding position; 3. Connection part; 4. Display module; 5. Second bonding position; 6. Auxiliary connection part; 7. Gold finger; 8. ITOPAD; 9. Tear handle; 10. Reinforcement end; 401. Upper polarizer; 402. Upper glass substrate; 403. Lower glass substrate; 404. Lower polarizer; 405. Liquid crystal cell. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] As described in the background art, after the existing FPC is bound to the display screen, since the upper surfaces are flush, it is necessary to apply positive protective glue at points to prevent the ITO traces from being corroded, thereby playing a protective role. However, such a glue application method not only has a high cost but also low efficiency.

[0031] To solve this technical problem, the present utility model provides an FPC binding structure. After the gold fingers of the FPC main body coincide and are bound with the ITO PAD on the lower glass substrate, the auxiliary connection part of the FPC main body is lengthened above the gold fingers to increase the distance at the edge. After being bound and pressed together with the lower glass substrate through ACF, it plays a role in protecting the ITO traces of the glass, thereby improving the reliable performance of the product. On the current conventional process, the requirement of the binding glue application process is removed, the production cost is saved, and the competitiveness of the product is improved.

[0032] Specifically, please refer to Figures 3-6 , the FPC binding structure specifically includes:

[0033] An FPC main body 1 and a display module 4. One end of the FPC main body 1 is provided with a first binding position 2, the other end of the FPC main body 1 is provided with a connection part 3, the display module 4 is provided with a second binding position 5, the first binding position 2 and the second binding position 5 are bound and pressed together through ACF. The upper surface of the FPC main body 1 protrudes from the second binding position 5 and forms an auxiliary connection part. The display module 4 can be an LCD, LED, OLED screen body, etc.

[0034] For the FPC binding structure provided by the present utility model, the display module 4 is an LCD screen. The LCD screen is provided with a light-emitting liquid crystal cell 405 and a second binding position 5. A plurality of light-emitting units are arranged in the light-emitting liquid crystal cell 405. The second binding position 5 is located on the lower glass substrate 403 and on one side of the light-emitting unit, and the ITO PAD 8 is arranged on the lower glass substrate 403. The light-emitting units are electrically connected to the gold fingers 7 on the corresponding first binding position 2 through the ITO PAD 8. The FPC main body 1 is connected to an external power supply main board through the connection part 3 to supply power to the light-emitting units so that the display module 4 works. By adding a cross-shaped reinforcement end 10 on each side of the first binding position 2 of the FPC main body 1, this shape increases the adhesion area after binding and improves the pulling force of the FPC main body 1. At the same time, through the FPC design with a lengthened binding position, when the gold fingers 7 of the FPC main body 1 coincide and are bound with the ITO PAD 8 on the lower glass substrate 403, the auxiliary connection part 6 of the FPC main body 1 is lengthened above the gold fingers 7 to increase the distance at the edge. After being bound and pressed together with the lower glass substrate 403 through ACF, it plays a role in protecting the ITO traces of the glass, so as to meet the requirement of canceling the positive glue application, save the process flow and materials, and improve the binding efficiency and the reliable performance of the product.

[0035] To enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0036] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments can be combined with each other.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] Please refer to Figures 3-6 , an FPC bonding structure, which includes an FPC main body 1 and a display module 4. A first bonding position 2 is provided at one end of the FPC main body 1, a connecting portion 3 is provided at the other end of the FPC main body 1, a second bonding position 5 is provided on the display module 4, and the first bonding position 2 and the second bonding position 5 are bonded and pressed together through ACF. The upper surface of the FPC main body 1 protrudes from the second bonding position 5 and forms an assisting connection portion 6. The display module 4 can be an LCD, LED, OLED screen body, etc.

[0039] Please refer to Figures 3-6 , the display module 4 is an LCD screen. A light-emitting liquid crystal cell 405 and a second bonding position 5 are provided on the LCD screen. A plurality of light-emitting units are provided in the light-emitting liquid crystal cell 405. The second bonding position 5 is located on the lower glass substrate 403 and on one side of the light-emitting units, and an ITOPAD 8 is provided on the lower glass substrate 403. The light-emitting units are electrically connected to the gold fingers 7 on the corresponding first bonding position 2 through the ITOPAD 8. The FPC main body 1 is connected to an external power main board through the connecting portion 3 to supply power to the light-emitting units so that the display module 4 works. By adding a cross-shaped reinforcement end 10 to each side of the first bonding position 2 of the FPC main body 1, this shape increases the adhesion area after bonding and improves the pulling force of the FPC main body 1. At the same time, through the FPC design with an extended bonding position, when the gold fingers 7 of the FPC main body 1 coincide with the ITOPAD 8 on the lower glass substrate 403 for bonding, the assisting connection portion 6 of the FPC main body 1 above the gold fingers 7 increases the distance at the edge, which protects the ITO trace of the glass after being bonded and pressed together with the lower glass substrate 403 through ACF, so as to meet the requirement of canceling the front dispensing, saving the process flow and materials, and improving the bonding efficiency and the reliable performance of the product.

[0040] Further optimize the FPC bonding structure provided in Embodiment 1. Specifically, as Figure 3 , Figure 4 and Figure 5As shown in the figure, a gold finger 7 is provided on the first binding position 2. The auxiliary connection part 6 is the width between the upper surface of the FPC main body 1 and the gold finger 7. An ITOPAD 8 is provided on the second binding position 5. The gold finger 7 is electrically connected to the ITOPAD 8. The width of the auxiliary connection part 6 between the upper surface of the FPC main body 1 and the gold finger 7 is 0.12 - 0.18 mm;

[0041] Through the above structural design, the width of the auxiliary connection part 6 between the upper surface of the FPC main body 1 and the gold finger 7 is specifically 0.15 mm. Of course, the width of the auxiliary connection part 6 between the upper surface of the FPC main body 1 and the gold finger 7 can also be not limited. The specific shape and size of the auxiliary connection part 6 are not specifically limited. By setting the auxiliary connection part 6, the connection area between the first binding position 2 and the second binding position 5 is increased, and the connection reliability between the first binding position 2 and the second binding position 5 is improved;

[0042] The electrical connection between the gold finger 7 and the ITOPAD 8 can be connected by any conductive fixing method, such as welding, bonding or clamping. No matter which connection method is used, the conductivity between the gold finger 7 and the ITOPAD 8 needs to be ensured after the connection;

[0043] Such as Figure 3 and Figure 6 As shown in the figure, the display module 4 includes a polarizer 401, an upper glass substrate 402, a lower glass substrate 403, and a lower polarizer 404 connected in sequence. A liquid crystal cell 405 is provided between the upper glass substrate 402 and the lower glass substrate 403. The ITOPAD 8 is provided on the lower glass substrate 403;

[0044] By setting the display module in this way, it is an LCD screen. The LCD screen is provided with a light-emitting liquid crystal cell and a second binding position. A plurality of light-emitting units are provided in the light-emitting liquid crystal cell. The second binding position is located on the lower glass substrate and on one side of the light-emitting unit, and the ITOPAD is provided on the lower glass substrate. The light-emitting unit is electrically connected to the gold finger on the corresponding first binding position through the ITOPAD. The FPC main body is connected to an external power main board through a connecting part to supply power to the light-emitting unit so that the display module works.

[0045] Further optimizing the FPC binding structure provided in Embodiment 1 or 2, as Figure 4 and Figure 5 As shown in the figure, the auxiliary connection part 6 is made of non-conductive material. The auxiliary connection part 6 is integrally formed with the FPC main body 1. A tear handle 9 is provided on the front surface of the FPC main body 1.

[0046] By integrally forming the auxiliary connection part 6 with the FPC main body 1, its processing is more convenient. The provided tear handle 9 makes the connection between the FPC main body 1 and the display module 4 more convenient. When the auxiliary connection part 6 is produced separately, it can be installed on the FPC main body 1 by welding, bonding or injection molding, etc.

[0047] The FPC bonding structure provided in each of the above embodiments is further optimized. For example, Figure 4 and Figure 5 as shown, reinforcing ends 10 are provided on both the left and right sides of the gold finger 7. The reinforcing ends 10 are used to increase the pulling force between the FPC main body 1 and the display module 4. There are two reinforcing ends 10, and the two reinforcing ends 10 are symmetrically arranged on the left and right sides of the interface end of the gold finger 7. The reinforcing end 10 is a cross-shaped reinforcing point;

[0048] By adding a cross-shaped reinforcing end 10 to each of the two sides of the first bonding position 2 of the FPC main body 1, this shape increases the adhesion area after bonding, improves the pulling force of the FPC main body 1, and the reinforcing ends 10 are symmetrically arranged on the left and right sides of the interface end of the gold finger 7, so the force is more uniform and the use effect is better;

[0049] The thickness of the FPC main body 1 is 90 - 110 microns, and the lower glass substrate 403 is DITO glass. With such a structural design, the FPC main body 1 has the characteristics of high wiring density, light weight, and thin thickness.

[0050] The usage process of the FPC bonding structure provided by the present utility model is as follows:

[0051] The display module 4 is an LCD screen. The LCD screen is provided with a light-emitting liquid crystal cell 405 and a second bonding position 5. A plurality of light-emitting units are arranged in the light-emitting liquid crystal cell 405. The second bonding position 5 is located on the lower glass substrate 403 and on one side of the light-emitting units, and the ITOPAD 8 is arranged on the lower glass substrate 403. The light-emitting units are electrically connected to the gold finger 7 on the corresponding first bonding position 2 through the ITOPAD 8. The FPC main body 1 is connected to an external power main board through the connecting portion 3 to supply power to the light-emitting units, so that the display module 4 works. By adding a cross-shaped reinforcing end 10 to each of the two sides of the first bonding position 2 of the FPC main body 1, this shape increases the adhesion area after bonding, improves the pulling force of the FPC main body 1. At the same time, through the FPC design with an extended bonding position, when the gold finger 7 of the FPC main body 1 coincides and bonds with the ITOPAD 8 on the lower glass substrate 403, the auxiliary connection portion 6 of the FPC main body 1 with an extended length above the gold finger 7 increases the distance from the edge, and after being bonded and pressed with the lower glass substrate 403 through ACF, it protects the ITO wiring of the glass, so as to meet the requirement of canceling the front dispensing, save the process flow and materials, and improve the bonding efficiency and the reliability of the product.

[0052] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0053] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of the embodiments. The accompanying drawings show the preferred embodiments of the present utility model, but do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present utility model in other related technical fields shall be within the scope of the patent protection of the present utility model by the same token.

Claims

1. An FPC binding structure, characterized in that: It includes: An FPC body (1), wherein one end of the FPC body (1) is provided with a first binding position (2), and the other end of the FPC body (1) is provided with a connecting portion (3); A display module (4), wherein a second binding position (5) is arranged on the display module (4), the first binding position (2) and the second binding position (5) are bonded and pressed together by ACF, and the second binding position (5) is protruded from the upper surface of the FPC body (1) and an auxiliary connection portion (6) is formed.

2. The FPC binding structure according to claim 1, characterized in that: A gold finger (7) is provided on the first binding position (2), the auxiliary connection portion (6) is the width between the upper surface of the FPC body (1) and the gold finger (7), and an ITOPAD (8) is provided on the second binding position (5), and the gold finger (7) is electrically connected to the ITOPAD (8).

3. The FPC binding structure according to claim 2, characterized in that: The width of the auxiliary connection portion (6) between the upper surface of the FPC body (1) and the gold finger (7) is 0.12-0.18 millimeters.

4. The FPC binding structure according to claim 3, characterized in that: The display module (4) comprises an upper polarizer (401), an upper glass substrate (402), a lower glass substrate (403) and a lower polarizer (404) which are connected in sequence, a liquid crystal box (405) is arranged between the upper glass substrate (402) and the lower glass substrate (403), and the ITOPAD (8) is arranged on the lower glass substrate (403).

5. The FPC binding structure according to claim 4, characterized in that: The auxiliary connection portion (6) is made of a non-conductive material, and the auxiliary connection portion (6) is integrally formed with the FPC body (1).

6. The FPC binding structure according to claim 5, characterized in that: A tear handle (9) is provided on the front side of the FPC body (1).

7. The FPC binding structure according to claim 6, characterized in that: Reinforcement ends (10) are provided on the left and right sides of the gold finger (7), and the reinforcement ends (10) are used to increase the pulling force between the FPC body (1) and the display module (4).

8. The FPC binding structure according to claim 7, characterized in that: Two reinforcement ends (10) are provided, and the two reinforcement ends (10) are symmetrically arranged on the left and right sides of the interface end of the gold finger (7).

9. The FPC binding structure according to claim 8, characterized in that: The reinforcement end (10) is a cross-shaped reinforcement point.

10. The FPC binding structure according to claim 9, characterized in that: The thickness of the FPC body (1) is 90-110 micrometers, and the lower glass substrate (403) is DITO glass.

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