Ultra-light and ultra-thin foldable touch screen

Abstract

The invention relates to the technical field of touch screens, in particular to an ultra-thin foldable touch screen which comprises an ultra-thin glass cover plate, a decorative ink layer, an OCA layer and a functional sheet layer from top to bottom, and the ultra-thin foldable touch screen is obtained by reducing the thickness of the glass cover plate and changing the material of the functional sheet layer on the basis of not changing the touch function of a product. Compared with the prior art, the special requirement that the product is light, thin and foldable in the market is met, in addition, due to the fact that the ultra-thin glass cover plate and the copper grid are adopted for manufacturing the product, the bending resistance of the product is remarkably improved, and experiments show that the product produced through the technology can be continuously bent for 200 thousand times, and the minimum bending radius is within 1 mm.

Description

Technical Field

[0001] The present invention relates to the technical field of touch screens, and in particular to an ultra-thin and foldable touch screen. Background Art

[0002] At present, touch screen products with conventional glass structures are stacked as glass cover + OCA + glass sensor. From the perspective of the overall design, the product is relatively thick and cannot be bent, which does not meet the market's requirements for the light and thin aesthetic design of electronic products and cannot be bent. Summary of the invention

[0003] The object of the present invention is to provide an ultra-thin and foldable touch screen to solve the problems mentioned in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An ultra-thin foldable touch screen, comprising:

[0006] From top to bottom, ultra-thin glass cover, decorative ink layer, OCA layer and functional sheet layer;

[0007] The functional sheet layer includes a copper grid attached to the OCA layer, a thin film layer arranged on the copper grid, and a touch FPC arranged on the copper grid.

[0008] Preferably, the thickness of the ultra-thin glass cover plate is less than 0.1 mm.

[0009] Preferably, the thickness of the OCA layer is 0.1 mm.

[0010] Preferably, a protection tube is provided at one end of the touch FPC connected to the copper grid, so as to protect the touch FPC and prevent the touch FPC from being separated from the copper grid.

[0011] Preferably, an OCA layer 2 and a substrate are disposed below both ends of the film layer, and one of the plug-ins on the protection tube is inserted into the OCA layer, and the other plug-in is inserted into the OCA layer 2.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention includes an ultra-thin glass cover plate, a decorative ink layer, an OCA layer and a functional layer from top to bottom. On the basis of not changing the touch function of the product, the thickness of the glass cover plate is reduced and the material of the functional layer is changed to meet the special market requirements of being light, thin and foldable. In addition, since the product is made of an ultra-thin glass cover plate and a copper grid, the bending resistance of the product is significantly improved. Experiments show that the product produced using this technology can achieve 200,000 uninterrupted bends, and the minimum bending radius is within 1 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0016] In the figure: 1. Ultra-thin glass cover; 2. Decorative ink layer; 3. OCA layer; 4. Copper grid; 5. Thin film layer; 6. OCA layer 2; 7. Substrate; 8. Touch FPC; 9. Protective tube; 10. Insert board. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 to Figure 2 , the present invention provides a technical solution:

[0019] An ultra-thin foldable touch screen, comprising:

[0020] From top to bottom, there are an ultra-thin glass cover plate 1, a decorative ink layer 2, an OCA layer 3 and a functional sheet layer. The decorative ink layer 2 is arranged along the edge of the ultra-thin glass cover plate 1, so that the decorative ink layer presents a square shape, which is used to achieve personalized aesthetic needs. The thickness of the ultra-thin glass cover plate 1 is less than 0.1 mm. The OCA layer 3 is a special adhesive for bonding transparent optical elements. It is colorless and transparent, has a light transmittance of more than 95%, has good bonding strength, can be cured at room temperature or medium temperature, and has small curing shrinkage. The thickness of the OCA layer 3 is 0.1 mm.

[0021] The functional layer includes a copper grid 4, a thin film layer 5 and a touch FPC 8. The copper grid 4 is arranged on the thin film layer 5. The copper grid 4 is arranged on the thin film layer 5 by plating technology. The touch FPC 8 is connected to the copper grid 4. The OCA layer 3 adheres the copper grid 4 layer to the ultra-thin glass cover 1.

[0022] A protective tube 9 is also provided on the touch FPC 8, and the protective tube 9 is sleeved on the touch FPC 8. Two plug-in plates 10 are provided at one end of the protective tube 9 that is in contact with the copper grid 4. OCA layer 2 6 is provided below both ends of the thin film layer 5, and a substrate 7 is provided below the OCA layer 2 6. The provision of the substrate 7 can avoid friction between the thin film layer 5 and the mounting surface without increasing the thickness of the middle part of the touch screen and affecting the bending of the touch screen. One of the plug-in plates 10 on the protective tube 9 is inserted into the OCA layer 3, and the other plug-in plate 10 is inserted into the OCA layer 2 6 to fix the position of the protective tube 9. The connection between the touch FPC 8 and the copper grid 4 is relatively fragile and is easy to fall off after being impacted. The protective tube 9 is used to protect the connection between the touch FPC 8 and the copper grid 4 to prevent the touch FPC 8 from falling off after being impacted.

[0023] Installation steps: print a decorative ink layer 2 on the surface of the ultra-thin glass cover 1; use a foldable OCA with better toughness to bond the ultra-thin glass cover 1 and the functional layer to the OCA layer 3; use a bending-resistant copper grid 4, and lead out the channels therein with a touch FPC 8, and set a protective tube 9 on the touch FPC 8; paste the ultra-thin glass cover 1, the OCA layer 3 and the functional layer as well as the OCA layer 2 6 and the substrate 7 together, and connect them to the whole machine mainboard through the touch FPC 8 to realize the touch function of the whole machine.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-thin foldable touch screen, characterized in that: include: From top to bottom, ultra-thin glass cover, decorative ink layer, OCA layer and functional sheet layer; The functional sheet layer includes a copper grid attached to the OCA layer, a thin film layer arranged on the copper grid, and a touch FPC arranged on the copper grid.

2. The ultra-thin foldable touch screen according to claim 1, characterized in that: The thickness of the ultra-thin glass cover plate is less than 0.1 mm.

3. The ultra-thin foldable touch screen according to claim 2, characterized in that: The thickness of the OCA layer is 0.1 mm.

4. The ultra-thin foldable touch screen according to claim 3, characterized in that: A protection tube is provided at one end of the touch FPC connected to the copper grid, which is used to protect the touch FPC and prevent the touch FPC from being separated from the copper grid.

5. The ultra-thin foldable touch screen according to claim 4, characterized in that: An OCA layer 2 and a substrate are disposed below both ends of the film layer. One of the plug-ins on the protection tube is inserted into the OCA layer, and the other plug-in is inserted into the OCA layer 2.

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