Integrated touch screen structure, touch screen and display equipment

Abstract

The utility model provides an integrated touch screen structure, a touch screen and a display device.The integrated touch screen structure comprises a transparent cover plate, an insulating film, first transparent optical cement, second transparent optical cement, a nanometer insulating wire, an ACF and a circuit board, and the first transparent optical cement is attached to the transparent cover plate; the nano insulated wire is arranged on one surface, coated with the first transparent optical cement, of the transparent cover plate and is provided with a bonding area, the insulating film is arranged between the transparent cover plate and the nano insulated wire and is opposite to the bonding area, and the ACF is positioned in the bonding area and is respectively connected with the nano insulated wire and the circuit board; when the sleeve on the nano insulated wire is removed by using laser, the insulating film resists the penetration of the laser, so that the ink area on the transparent cover plate is not damaged, and the plastic cover plate is not damaged by cutting; therefore, light leakage caused by damage to ink in the ink area of the cover plate due to direct laser welding of the lead and the circuit board is avoided, and the product quality of the touch screen is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of large-size touch screens, and in particular to an integrated touch screen structure, a touch screen and a display device. Background Art

[0002] Touch Panel, also known as "touch screen" or "touch panel", is an inductive liquid crystal display device that can receive input signals such as contacts. When the graphic button on the screen is touched, the tactile feedback system on the screen can drive various connection devices according to the pre-programmed program, which can be used to replace the mechanical button panel and create vivid audio and video effects through the liquid crystal display screen. As an intelligent human-computer interaction interface product, touch screens have been widely used in production and life.

[0003] In the prior art, touch screens generally adopt a double-layer flim structure. Sensor wires are deposited by yellow light etching, laser etching and other processes, and coated or attached to transparent substrates such as PET. The conductive film is etched into the required wiring pattern, and the wire film is attached by transparent optical adhesive to form a staggered sensing circuit, thereby achieving the sensing capacitance function of the touch control. Alternatively, a touch cross-sensing pattern is printed on a transparent film by nano-insulated copper wires, and the sensor with the transparent film is attached to the cover plate by transparent optical adhesive to form a touch screen. The above schemes all require the transparent plastic substrate, i.e., PET, to carry the sensor wires, and then the sensor is adhered between the display screen and the glass cover plate by optical adhesive, resulting in a complex structure of the sensor area between the display screen and the glass cover plate, and the difficulty of touch screen production and the thickness of the touch screen are not ideal.

[0004] What kind of technical solution should be adopted for the sensor area to solve the problems of high difficulty in touch screen production and large thickness of the touch screen has been disclosed in the previous case of this application, namely patent application number 2023233949464. However, the applicant has found in practice that when the nano-insulated wire is laser welded to the circuit board, the laser will damage the ink in the ink area of ​​the cover plate, causing light leakage from the cover plate and affecting the quality of the touch screen. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present application provides an integrated touch screen structure and a touch screen.

[0006] An integrated touch screen structure disclosed in the present application includes: a transparent cover plate, an insulating film, a first transparent optical adhesive, a nano-insulated wire, an ACF and a circuit board, wherein the first transparent optical adhesive is applied to the transparent cover plate, the nano-insulated wire is arranged on a side of the transparent cover plate applied with the first transparent optical adhesive, and has a bonding area, the insulating film is arranged between the transparent cover plate and the nano-insulated wire, and is arranged relative to the bonding area, the ACF is located in the bonding area, and is respectively connected to the nano-insulated wire and the circuit board.

[0007] According to one embodiment of the utility model, the nano-insulated wires are 3D printed or coated on one side of the transparent cover plate which is covered with the first transparent optical adhesive.

[0008] According to an embodiment of the present invention, the first transparent optical adhesive is OCA or OCR.

[0009] According to one embodiment of the present invention, the nano-insulated wire is a nano-insulated silver wire or a nano-insulated copper wire.

[0010] According to an embodiment of the present invention, the thickness of the first transparent optical adhesive is between 20-500 um.

[0011] According to one embodiment of the present invention, the transparent cover plate is a glass cover plate.

[0012] According to an embodiment of the present invention, the integrated touch screen structure further includes a second transparent optical adhesive, the second transparent optical adhesive is coated on the first transparent optical adhesive, and the nano-insulated wire is located between the first transparent optical adhesive and the second transparent optical adhesive.

[0013] According to an embodiment of the present invention, the second transparent optical adhesive is OCA or OCR.

[0014] According to the second aspect of the utility model, the present application further discloses a touch screen, which includes an integrated touch screen structure.

[0015] According to the third aspect of the utility model, the present application also discloses a display device, which includes a touch screen.

[0016] The beneficial effects of the present application are as follows: compared with the existing touch panel structure, the integrated touch screen structure has a structure in which the nano-insulated wire is directly printed on the first transparent optical adhesive of the transparent cover plate, and the nano-insulated wire is attached to the transparent cover plate through the first transparent optical adhesive. Therefore, when the transparent cover plate is accidentally broken, the nano-insulated wire will not be broken along with the transparent cover plate. At the same time, when the sleeve on the nano-insulated wire is removed by laser, the insulating film resists the penetration of the laser, so the ink area on the transparent cover plate will not be damaged, and the plastic cover plate will not be cut. Therefore, the direct use of laser welding between the wire and the circuit board will avoid damage to the ink area of ​​the cover plate and cause light leakage, thereby improving product quality. Furthermore, compared with welding the nano-insulated wire and the circuit board, the nano-insulated wire and the circuit board are connected by ACF, which improves the feasibility of connecting the nano-insulated wire and the circuit board. At the same time, this process method is different from the OGS / OGM process, because this process method does not require heating and baking, so the transparent cover plate can use not only glass materials but also plastic materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 FIG. 4 is a cross-sectional schematic diagram of an integrated touch screen structure in an embodiment.

[0019] Reference numerals:

[0020] 1-transparent cover; 2-insulating film; 3-first transparent optical adhesive; 4-nano-insulated wire; 5-ACF; 6-circuit board; 7-second transparent optical adhesive; 41-bonding area; 42-sensor area. DETAILED DESCRIPTION

[0021] The following will disclose multiple embodiments of the present application with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present application. In other words, in some embodiments of the present application, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0022] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, in the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present application. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0024] In order to further understand the application content, features and effects of the present application, the following embodiments are cited and described in detail with reference to the accompanying drawings.

[0025] Embodiment 1

[0026] See also Figure 1 The integrated touch screen structure includes a transparent cover plate 1, an insulating film 2, a first transparent optical adhesive 3, nano-insulated wires 4, ACF5 and a circuit board 6. The transparent cover plate 1, also known as CG, is the outermost layer of the integrated touch screen structure and plays a role of covering and protecting. The first transparent optical adhesive 3 is used to carry the nano-insulated wires 4. The insulating film 2 is used as a protective layer to protect the transparent cover plate 1. ACF5 is used to connect the circuit board 5 and the nano-insulated wires 4. The circuit board 5 and the nano-insulated wires 4 are connected to realize the touch sensing function.

[0027] Among them, the first transparent optical adhesive 3 is attached to the transparent cover plate 1, the nano-insulated wire 4 is arranged on the side of the transparent cover plate 1 attached with the first transparent optical adhesive 3, and it has a bonding area 41 and a sensor area 42. The insulating film 2 is arranged between the transparent cover plate 1 and the nano-insulated wire 4, and is arranged relative to the bonding area 41. The bonding area 41 is the exposed area of ​​the wire in the nano-insulated wire 4, and the sensor area 42 is the touch part. ACF5 is an anisotropic conductive adhesive film, which is used to connect the circuit board 6 and the nano-insulated wire 4, and the circuit board 6 is connected to the nano-insulated wire 4.

[0028] Specifically, in the present application, the transparent cover plate 1 is a plastic transparent cover plate 1, the nano-insulated wire is a nano-insulated copper wire, and the insulating film 2 is attached to the plastic transparent cover plate 1. The insulating film 2 is made of a material with high impedance, high heat dissipation and non-absorption of the laser wavelength used for laser welding. The cross-sectional area of ​​the insulating film 2 is smaller than the cross-sectional area of ​​the transparent cover plate 1. The thickness of the first transparent optical adhesive 3 is 20um. After a layer of the first transparent optical adhesive 3 is coated on the surface of the plastic transparent cover plate 1, the designed pattern is implanted on the first transparent optical adhesive 3 of the transparent cover plate 1 by using a printing device, that is, the nano-insulated wire is directly printed on the surface of the first transparent optical adhesive 3, and the nano-insulated wire is fixed by the first transparent optical adhesive 3 on the surface of the plastic transparent cover plate 1. Then, the sleeve of the bonding area of ​​the nano-insulated wire 4 is cut off by laser, and the circuit board 6 is connected to the nano-insulated wire 4 through ACF5. After the connection, the nano-insulated copper wire forms a touch sensing function. In this example, the circuit board 6 is an FPC, that is, a flexible circuit board 6, and the first transparent optical adhesive 3 is an OCA.

[0029] Thus, compared with the existing touch panel structure, the integrated touch screen structure has a better structure because the nano-insulated wire 4 is directly printed on the first transparent optical adhesive 3 of the transparent cover plate 1, and the nano-insulated wire 4 is attached to the transparent cover plate 1 through the first transparent optical adhesive 3. Therefore, when the transparent cover plate 1 is accidentally broken, the nano-insulated wire 4 will not be broken along with the transparent cover plate 1. At the same time, when the sleeve on the nano-insulated wire is removed by laser, the insulating film 2 resists the penetration of the laser, so the ink area on the transparent cover plate 1 will not be damaged, and the plastic cover plate will not be cut. Therefore, it is avoided that the wire and the circuit board 6 are directly welded by laser to damage the ink in the ink area of ​​the cover plate and cause light leakage, thereby improving the product quality. Moreover, compared with welding the nano-insulated wire 4 and the circuit board 6, the nano-insulated wire 4 and the circuit board 6 are connected by ACF5, which improves the feasibility of connecting the nano-insulated wire 4 and the circuit board 6. At the same time, this process method is different from the OGS / OGM process. Because this process method does not require heating and baking, the transparent cover plate 1 can use not only glass materials but also plastic materials.

[0030] Embodiment 2

[0031] Please refer to the example. The integrated touch screen structure also includes a transparent cover plate 1, an insulating film 2, a first transparent optical adhesive 3, nano-insulated wires 4 and a circuit board. The transparent cover plate 1, also known as CG, is the outermost layer of the integrated touch screen structure and plays a role of covering and protecting. The first transparent optical adhesive 3 is used to carry the nano-insulated wires 4. The insulating film 2 is used as a protective layer to protect the transparent cover plate 1. The circuit board is connected to the nano-insulated wires 4 to realize the touch sensing function.

[0032] Different from the first embodiment, the transparent cover plate 1 in this embodiment is a glass transparent cover plate 1, the first transparent optical adhesive 3 is OCR with a thickness of 500um, and the nano-insulated wire 4 is coated on the transparent cover plate 1, and the nano-insulated wire 4 is a nano-insulated silver wire.

[0033] Preferably, the integrated touch screen structure further includes a second transparent optical adhesive 7 , which is coated on the first transparent optical adhesive 3 , and the nano-insulated wire 4 is located between the first transparent optical adhesive 3 and the second transparent optical adhesive 7 .

[0034] In this way, when producing a touch screen, the second transparent optical adhesive 7 serves as a covering layer of the nano-insulated wire 4 to ensure the correctness of the touch pattern of the nano-insulated wire 4 and the normal use of the touch function. At the same time, it serves as a protective layer for the nano-insulated wire 4 to avoid the influence of moisture. In addition, the second transparent optical adhesive 7 can be used as an adhesive layer with the display.

[0035] Embodiment 3

[0036] The touch screen in this example includes the integrated touch screen structure in the first embodiment.

[0037] Embodiment 4

[0038] The touch screen in this example includes the integrated touch screen structure in the second embodiment.

[0039] Embodiment 5

[0040] The display device in this example includes the touch screen in the third embodiment.

[0041] Embodiment 6

[0042] The display device in this example includes the touch screen in the fourth embodiment.

[0043] In summary, compared with the existing touch panel structure, the integrated touch screen structure has a better structure because the nano-insulated wire is directly printed on the first transparent optical adhesive of the transparent cover plate, and the nano-insulated wire is attached to the transparent cover plate through the first transparent optical adhesive. Therefore, when the transparent cover plate is accidentally broken, the nano-insulated wire will not be broken along with the transparent cover plate. At the same time, when the sleeve on the nano-insulated wire is removed by laser, the insulating film resists the penetration of the laser, so the ink area on the transparent cover plate will not be damaged, and the plastic cover plate will not be cut. Therefore, it is avoided that the wire and the circuit board are directly welded by laser to damage the ink area of ​​the cover plate and cause light leakage, thereby improving the product quality. Moreover, compared with welding the nano-insulated wire and the circuit board, the nano-insulated wire and the circuit board are connected by ACF, which improves the feasibility of connecting the nano-insulated wire and the circuit board. At the same time, this process method is different from the OGS / OGM process because this process method does not require heating and baking, so the transparent cover plate can use not only glass materials but also plastic materials.

[0044] The above is only the implementation mode of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An integrated touch screen structure, characterized in that: include: A transparent cover plate (1), an insulating film (2), a first transparent optical adhesive (3), a nano-insulated wire (4), an ACF (5) and a circuit board (6), wherein the first transparent optical adhesive (3) is adhered to the transparent cover plate (1), the nano-insulated wire (4) is arranged on a side of the transparent cover plate (1) adhered to the first transparent optical adhesive (3), and has a bonding area (41), the insulating film (2) is arranged between the transparent cover plate (1) and the nano-insulated wire (4), and is arranged relative to the bonding area (41), and the ACF (5) is located in the bonding area (41) and is respectively connected to the nano-insulated wire (4) and the circuit board (6).

2. The integrated touch screen structure according to claim 1, characterized in that: The nano-insulated wire (4) is 3D printed or wire coated on the side of the transparent cover plate (1) that is coated with the first transparent optical adhesive (3).

3. The integrated touch screen structure according to claim 1, characterized in that: The first transparent optical adhesive (3) is OCA or OCR.

4. The integrated touch screen structure according to claim 1, characterized in that: The nano-insulated wire (4) is a nano-insulated silver wire or a nano-insulated copper wire.

5. The integrated touch screen structure according to claim 1, characterized in that: The thickness of the first transparent optical adhesive (3) is between 20 and 500 um.

6. The integrated touch screen structure according to claim 1, characterized in that: The transparent cover plate (1) is a glass cover plate or a plastic cover plate.

7. The integrated touch screen structure according to claim 1, characterized in that: It also includes a second transparent optical adhesive (7), wherein the second transparent optical adhesive (7) is coated on the first transparent optical adhesive (3), and the nano-insulated wire (4) is located between the first transparent optical adhesive (3) and the second transparent optical adhesive (7).

8. The integrated touch screen structure according to claim 7, characterized in that: The second transparent optical adhesive (7) is OCA or OCR.

9. A touch screen, characterized in that: It comprises the integrated touch screen structure as described in any one of claims 1-8.

10. A display device, characterized in that: Including the touch screen as claimed in claim 9.

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