Film sensor for solving anti-UV reliability through novel material combination

Abstract

The utility model relates to the technical field of thin film sensors, in particular to a thin film sensor for solving the anti-UV reliability through novel material combination, which comprises a touch function film and a glass cover plate layer attached to the touch function film, and the touch function film sequentially comprises an upper ITO film layer, an OCA adhesive layer and a lower ITO film layer from top to bottom. An anti-UV optical adhesive layer is attached to the upper ITO film layer, and the upper ITO film layer is attached to the glass cover plate layer through the anti-UV optical adhesive layer; in order to overcome the defects of a thin film sensor produced by adopting common OCA, the technical scheme adopts a method of replacing the common OCA on the uppermost layer with an anti-UV optical adhesive layer, the anti-UV optical adhesive layer is arranged on the uppermost layer, and the ITO film layer on the lower layer has the function of blocking UV light of sunlight due to the anti-UV optical adhesive layer; when the thin film sensor adopting the anti-UV optical adhesive layer on the uppermost layer is used outdoors, the service life is greatly prolonged, and the outdoor use standard is met.

Description

Technical Field

[0001] The utility model relates to the technical field of thin film sensors, in particular to a thin film sensor with a new material combination to solve the problem of UV resistance reliability. Background Art

[0002] The existing thin film sensors are bonded with ordinary OCA, which does not block UV light. When the touch screen of the thin film sensor produced by ordinary OCA is used in outdoor products, due to direct sunlight with UV light, it will easily cause the thin film sensor under the glass cover to age and have functional problems.

[0003] To solve this problem, the prior art proposes a touch screen and a display device with low reflection and UV resistance characteristics, as described in the utility model patent authorization announcement number CN218974894U. By adding a polarizer to the touch screen structure or moving the upper polarizer of the liquid crystal display module to the touch screen structure, the anti-UV and polarization characteristics of the polarizer are utilized to make the touch screen have lower reflectivity, higher UV resistance and high explosion-proof characteristics; however, this will lead to an increase in the overall thickness of the touch screen and a corresponding increase in cost.

[0004] For example, a touch screen with a high-hardness anti-UV coating as described in the utility model authorization announcement number CN204028874U adopts vacuum coating or spraying to prepare an aluminum oxide film on a glass substrate, so that the substrate surface has high hardness, anti-scratch, anti-ultraviolet, and anti-fouling properties, and maximizes the wear resistance of the substrate surface. At the same time, the transmittance of the substrate surface is improved, and it has strong adaptability to ambient temperature and can be used under extremely harsh conditions of use. It also improves the corrosion resistance and stability of the touch screen, and is simple to process and manufacture, which is enough to replace the currently expensive sapphire panel. However, when the functional layer is attached to the surface by surface spraying or vacuum coating, the functional layer will be worn away after a period of use, resulting in a decrease in UV resistance.

[0005] Another example is the UV-resistant and corrosion-resistant capacitive touch screen module described in the utility model patent authorization announcement number CN210109782U. By coating the lower surface of the cover glass with UV-resistant ink, the penetration rate of ultraviolet rays can be reduced, and the aging of the optical glue can be avoided, which can lead to the structure falling off. The capacitive touch screen module has high waterproofness, salt spray corrosion resistance and UV aging resistance.

[0006] However, since anti-UV ink is more widely used in the printing industry, coating the lower surface of the cover glass with anti-UV ink will increase the process, and the UV ink itself has low adhesion, and the entire layer of coating will affect the adhesion strength between the glass cover and the functional film. In this regard, based on the above problems, it is necessary to propose an improved technical solution. Utility Model Content

[0007] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0008] A thin film sensor with a new material combination to solve the problem of UV resistance reliability includes a touch functional film and a glass cover layer bonded to the touch functional film. The touch functional film includes an upper ITO film layer, an OCA adhesive layer and a lower ITO film layer from top to bottom. An anti-UV optical adhesive layer is attached to the upper ITO film layer, and the upper ITO film layer is bonded to the glass cover layer via the anti-UV optical adhesive layer.

[0009] Preferably, a circle of glue-dotting frame is arranged along the edge of the lower section of the glass cover layer, and the thickness of the glue-dotting frame matches the thickness of the anti-UV optical adhesive layer, and the anti-UV optical adhesive layer is arranged within the glue-dotting frame.

[0010] Preferably, the glue-dotting frame is made of colored material.

[0011] Preferably, the thickness of the glass cover layer is 0.6 mm-0.8 mm.

[0012] Preferably, the thickness of the UV-resistant optical adhesive layer is 0.1 mm-0.2 mm.

[0013] Preferably, the thickness of the upper ITO film layer is 0.02 mm-0.10 mm.

[0014] Preferably, the thickness of the OCA adhesive layer is 0.02 mm-0.10 mm.

[0015] Preferably, the thickness of the lower ITO film layer is 0.1 mm-0.2 mm.

[0016] Preferably, the upper layer of the glass cover layer is coated with an anti-fingerprint ink layer.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] In view of the above-mentioned defects of thin-film sensors produced by ordinary OCA, the technical solution adopts the method of replacing the topmost ordinary OCA layer with an anti-UV optical adhesive layer. Because the anti-UV optical adhesive layer is on the top layer and the ITO film layer on the bottom layer has the function of blocking the UV light of the sun, the life of the thin-film sensor using the anti-UV optical adhesive layer on the top layer is greatly extended when used outdoors, meeting the standards for outdoor use.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the layered structure of the utility model;

[0022] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0023] Figure 3 It is a schematic diagram of the partial cross-sectional structure of the edge of the utility model;

[0024] Figure 4 It is a schematic diagram of the explosion structure of the utility model.

[0025] The reference numerals and names in the figures are as follows:

[0026] Glass cover layer 10 , anti-UV optical adhesive layer 20 , upper ITO film layer 30 , OCA adhesive layer 40 , lower ITO film layer 50 , anti-fingerprint ink layer 60 , and glue-dot frame 70 . DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. 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.

[0028] See also Figure 1-4 In an embodiment of the utility model, a thin film sensor with a new material combination for solving the problem of UV resistance reliability includes a touch functional film and a glass cover layer 10 bonded to the touch functional film. The touch functional film includes an upper ITO film layer 30, an OCA adhesive layer 40 and a lower ITO film layer 50 from top to bottom. An anti-UV optical adhesive layer 20 is attached to the upper ITO film layer 30, and the upper ITO film layer is bonded to the glass cover layer 10 through the anti-UV optical adhesive layer 20.

[0029] In the above technical solution, the thin film sensor can be used independently and can be directly attached to the display screen. It can be attached to the display screen by optical glue. The glass cover layer 10 is located at the outermost layer and also at the uppermost layer, which protects the thin film sensor and ensures the integrity of the plane for user touch control. The thickness of the glass cover layer 10 is 0.6mm-0.8mm, preferably 0.7mm, and an anti-fingerprint ink layer 60 can be optionally coated on the upper layer of the glass cover layer 10 to achieve the effect of anti-fingerprint printing. The touch functional film is formed by bonding the upper ITO film layer 30, the OCA glue layer 40 and the lower ITO film layer 50. The thickness of the upper ITO film layer 30 is 0.02mm-0.10mm, and the OCA glue layer 40 is 0.02mm-0.10mm. The thickness of layer 40 is 0.02mm-0.10mm, and the thickness of the lower ITO film layer 50 is 0.1mm-0.2mm, which plays a touch sensing role. The anti-UV optical adhesive layer 20 is used between the glass cover layer 10 and the touch functional film for bonding. In view of the above-mentioned defects of the thin film sensor produced by ordinary OCA, the technical solution adopts the method of replacing the uppermost ordinary OCA with the anti-UV optical adhesive layer 20. Because the anti-UV optical adhesive layer 20 is on the uppermost layer and the ITO film layer on the lower layer has the function of blocking the UV light of the sun due to the anti-UV optical adhesive layer 20, the thin film sensor using the anti-UV optical adhesive layer 20 on the uppermost layer has a greatly extended life when used outdoors, meeting the standards for outdoor use.

[0030] During the production process, in order to facilitate the curing of the anti-UV optical adhesive layer 20 and to ensure that there is no white edge on the edge of the thin film sensor after bonding, the thickness of the anti-UV optical adhesive layer 20 is 0.1mm-0.2mm, preferably 0.125mm, to ensure that the thickness is sufficient so that white edges are not easily generated, and a circle of glue-dotting frame 70 is provided at the edge position of the lower section of the glass cover layer 10, and the thickness of the glue-dotting frame 70 matches the thickness of the anti-UV optical adhesive layer 20, and the anti-UV optical adhesive layer 20 is provided within the glue-dotting frame 70; through this arrangement, it is not easy for the anti-UV optical adhesive to overflow from the glass cover layer 10 when injected, and the glue-dotting frame 70 is made of colored material, which further ensures that there is no white edge on the edge of the thin film sensor.

[0031] 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 basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, 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 are included in the present invention.

Claims

1. A thin film sensor with a novel material combination to solve UV resistance reliability, comprising a touch functional film and a glass cover layer attached to the touch functional film, wherein the touch functional film comprises an upper ITO film layer, an OCA adhesive layer and a lower ITO film layer in order from top to bottom, characterized in that: An anti-UV optical adhesive layer is attached to the upper ITO film layer, and the upper ITO film layer is bonded to the glass cover layer via the anti-UV optical adhesive layer.

2. According to claim 1, a new material combination for solving UV resistance reliability of thin film sensor is characterized in that: A circle of glue-dotting frame is arranged along the edge of the lower section of the glass cover layer, and the thickness of the glue-dotting frame matches the thickness of the anti-UV optical adhesive layer, and the anti-UV optical adhesive layer is arranged within the glue-dotting frame.

3. The thin film sensor with a novel material combination for solving UV resistance reliability according to claim 2 is characterized in that: The glue-dispensing frame is made of colored material.

4. The thin film sensor with a novel material combination for solving UV resistance reliability according to claim 1, characterized in that: The thickness of the glass cover layer is 0.6mm-0.8mm.

5. The thin film sensor with a novel material combination for solving UV resistance reliability according to claim 1 is characterized in that: The thickness of the UV-resistant optical adhesive layer is 0.1mm-0.2mm.

6. The thin film sensor with a novel material combination for solving UV resistance reliability according to claim 1, characterized in that: The thickness of the upper ITO film layer is 0.02mm-0.10mm.

7. The thin film sensor with a novel material combination for solving UV resistance reliability according to claim 1, characterized in that: The thickness of the OCA adhesive layer is 0.02mm-0.10mm.

8. The thin film sensor with a novel material combination for solving UV resistance reliability according to claim 1, characterized in that: The thickness of the lower ITO film layer is 0.1mm-0.2mm.

9. The thin film sensor with a novel material combination for solving UV resistance reliability according to claim 1, characterized in that: The upper layer of the glass cover layer is coated with an anti-fingerprint ink layer.

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