Naked eye anti-blurring electronic equipment screen protection film and preparation method thereof

Abstract

The invention relates to the technical field of protective films, in particular to a naked-eye anti-blurred-eye electronic equipment screen protective film and a preparation method thereof. The screen protection film comprises a base film, a laminated layer is arranged on the base film, convex lenses are fixedly arranged in the laminated layer, and an ink jet functional layer is arranged above the laminated layer; the screen protection film can achieve the effect of preventing blurred eyes with naked eyes, people with presbyopia can clearly watch content on a screen of electronic equipment without wearing presbyopic glasses, and the screen protection film is more convenient and faster to use.

Description

Technical Field

[0001] The invention relates to the technical field of protective films, and in particular to a naked eye anti-smudge electronic device screen protective film and a preparation method thereof. Background Art

[0002] When people enter middle age or old age, they often have the problem of astigmatism, that is, farsightedness. When looking at close objects, the image cannot be fully focused when projected onto the retina, so the object becomes blurry, which has a certain impact on people's work and life. At this time, they need to wear reading glasses for correction to improve their vision.

[0003] With the development of society and the popularization of electronic devices, various electronic devices, such as mobile phones and computers, are increasingly used in people's daily work, life and study. For people with presbyopia, when watching the screen of electronic devices, the screen will be blurred. At this time, people put the electronic devices far away or wear reading glasses, which brings inconvenience to people's use. In particular, it also causes great trouble to people who are not used to wearing glasses.

[0004] Therefore, the present invention proposes a naked eye anti-stigma electronic device screen protective film. People can choose a suitable degree according to their own needs and stick it on the screen of the electronic device. Then, when using it, they can clearly view the content on the screen without wearing glasses, which brings convenience to people's daily work, life and study, and has positive significance. Summary of the invention

[0005] The purpose of the present invention is to provide a naked eye anti-stigma electronic device screen protective film and a preparation method thereof, so as to solve the problem that people with presbyopia need to wear reading glasses to see clearly when watching electronic devices, which brings inconvenience to people's daily work, life and study.

[0006] 11. To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a naked eye anti-smudge electronic device screen protective film, comprising a base film layer, an interlayer layer and an inkjet functional layer;

[0007] The interlayer is arranged above the base film layer, and the inkjet functional layer is located above the interlayer;

[0008] The interlayer includes convex lenses, which are evenly arranged on the base film layer and fixed on both sides of the convex lenses by optical glue;

[0009] The inkjet functional layer is located above the convex lens and above the optical glue.

[0010] Furthermore, the base film layer is a base film material with high transparency and high hardness, including polyethylene terephthalate and polyimide.

[0011] Furthermore, the base film layer has a thickness of 50 to 150 μm, a light transmittance of ≥90%, and a haze of <1%.

[0012] Furthermore, the material of the convex lens includes polymethyl methacrylate, polycarbonate and silicone / UV curing glue. When silicone / UV curing glue is used, the weight ratio of silicone to UV curing glue is 1:1; the optical glue includes UV curing glue and OCA optical glue.

[0013] Furthermore, the thickness of the interlayer is 20-80 μm; the diameter of the convex lens is 0.1-1 mm, and it is arranged in a hexagonal close-packed or rectangular shape with a spacing of 1.1-1.5 times the diameter; the thickness of the convex lens is 10-50 μm, and the thickness of the optical glue layer on both sides of the convex lens is 5-15 μm.

[0014] Furthermore, the inkjet functional layer includes a base layer and a functional layer, the base layer material includes UV curing glue, silicone and acrylic resin, and the thickness of the base layer is 5-10 μm.

[0015] Furthermore, the functional layer includes an anti-blue light coating and an anti-fingerprint coating; the total thickness of the inkjet functional layer is 10 to 30 μm.

[0016] The method for preparing a screen protective film comprises the following steps:

[0017] S1. Apply a layer of optical glue on the surface of the base film layer and cure it;

[0018] S2, arranging the convex lenses evenly on the optical glue, and after the arrangement is completed, covering the convex lenses with another layer of optical glue, and then curing;

[0019] S3. Arranging an inkjet functional layer on the surface of the cured optical glue to obtain the screen protective film of the present invention.

[0020] Furthermore, in the above-mentioned S2, the convex lens is formed by inkjet printing.

[0021] Furthermore, in the above-mentioned S1-S3, the surface of the base film layer, the surface of the optical glue after curing, and the surface of the base layer in the inkjet functional layer need to be treated by plasma surface treatment technology.

[0022] Beneficial effects of the present invention: The screen protective film of the present invention can achieve the effect of preventing naked eyes from becoming blurred. For people with presbyopia, they can clearly view the content on the screen of the electronic device without wearing reading glasses, which is more convenient and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of the protective film of the present invention;

[0024] Figure 2 It is a schematic diagram of the hexagonal close arrangement of convex lenses in Example 1 of the present invention.

[0025] The names corresponding to the marks in the figure are:

[0026] 1. Base film layer; 2. Interlayer; 21. Convex lens; 22. Optical glue; 3. Inkjet functional layer. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] like Figure 1 The screen protection film of the present invention comprises a base film layer, an interlayer layer and an inkjet functional layer from bottom to top.

[0029] In the embodiments of the present invention, the base film layer needs to be made of a base film material with high transparency and high hardness, such as polyethylene terephthalate (PET) and polyimide (PI), with a transmittance of ≥90%, a haze of <1%, and a thickness of 50 to 150 μm.

[0030] A layer of interlayer is fixedly arranged on the base film layer, the interlayer includes a convex lens, the convex lens is fixed on the base film layer by optical glue, the optical glue can be UV curing glue and OCA optical glue, the material of the convex lens can be polymethyl methacrylate (PMMA), polycarbonate (PC) and silicone / UV curing glue, etc., the diameter of the convex lens is 0.1-1mm, and it is arranged in a hexagonal close packing or a rectangular arrangement, the center distance between two adjacent convex lenses is 1.1-1.5 times the diameter, the thickness of the convex lens is 10-50μm, and the total thickness of the interlayer is controlled at 20-80μm.

[0031] The inkjet functional layer includes a base layer and a functional layer. The base layer can be made of UV curing glue, silicone and acrylic resin, etc. The thickness of the base layer is 5 to 15 μm, and a functional layer is arranged on the base layer. The functional layer includes an anti-blue light coating (5% Tinuvin 326 + 95% UV curing glue), an anti-fingerprint coating (perfluoropolyether, PFPE) and an anti-reflection film (10% ZrO2 nanoparticles + 90% UV curing glue), etc. The thickness of the entire inkjet functional layer is controlled to be 10 to 30 μm.

[0032] Example 1

[0033] In this embodiment, a screen protective film for an electronic device is prepared, and the specific steps are as follows:

[0034] 1. Treat the surface of the base film material

[0035] In this embodiment, plasma surface treatment technology is used to treat the surface of the base film material (power 100 W, time 30 s, using Ar / O2 mixed gas, the gas ratio of Ar to O2 is 4:1, the conditions are the same), so that the surface of the base film is clean and the surface energy is 50-70 mN / m, which helps to improve the bonding strength between the base film and the optical glue; in this embodiment, the base film material is selected as polyethylene terephthalate with a thickness of 100 μm.

[0036] 2. Preparation of interlayer

[0037] A layer of optical glue is applied on the surface of the treated base film. In this embodiment, the optical glue is UV curable glue (Norland NOA61). After the coating is completed, UV curing (365nm, 50mW / cm 2 , 5 to 10 s, the same conditions); in this embodiment, the material of the convex lens is polymethyl methacrylate (PMMA), the diameter of the convex lens is about 0.5 mm, the radius of curvature is about 225 mm, and the center thickness is about 30 μm; hexagonal close packing is adopted, and the distance between the centers of two adjacent convex lenses is 1.1 times of their diameters.

[0038] The convex lens can be prepared by mold forming, photolithography, inkjet printing and other methods. In this embodiment, the inkjet printing method is selected.

[0039] The base film material coated with optical glue was subjected to plasma surface treatment to increase the surface energy to 50-70 mN / m. Then, a high-precision inkjet printer (Fuji Dimatix DMP-3000) was used to spray polymethyl methacrylate (heated and liquefied) in the form of tiny droplets onto the surface of the base film material. The volume of the liquid was controlled at 5 pL. The liquid spread on the surface of the base film material and formed a plano-convex lens. Then, PMMA was cooled and solidified to form a convex lens structure.

[0040] A layer of UV curing glue is further coated on the base film material after the inkjet printing. After curing, the interlayer can be prepared. In this embodiment, the thickness of the optical glue layer on both sides of the convex lens is controlled at 10 μm, and the degree of the obtained convex lens is about +2D.

[0041] 3. Preparation of inkjet functional layer

[0042] The upper part of the cured interlayer is subjected to plasma surface treatment, and the surface energy is 50-70 mN / m. After the treatment, a base layer is coated on the surface of the interlayer. In the present embodiment, silicone (Dow Corning OE-6550) is used for the base layer. After coating, it is thermally cured at 120°C for 20 minutes. In the present embodiment, the thickness of the base layer is 10 μm, and the base layer is subjected to plasma surface treatment.

[0043] In this embodiment, a functional layer is prepared on the base layer, specifically an anti-blue light coating and an anti-fingerprint coating, wherein the anti-blue light coating is made of 5% Tinuvin 326 + 95% UV curing glue, and UV curing (365nm, 50mW / cm 2 , 5s), the thickness of the anti-blue light coating is 10μm; the anti-fingerprint coating is made of perfluoropolyether through vapor deposition and has a thickness of 1μm.

[0044] The screen protective film prepared by the embodiment of the present invention has a positive effect on preventing naked eye from becoming blurred vision, and brings convenience to users. At the same time, the screen protective film of the present invention has excellent quality and performance, is sensitive to reaction, and has good flexibility and wear resistance, which brings convenience to the daily work, life and study of people with presbyopia.

[0045] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. A naked eye anti-smudge electronic device screen protective film, characterized in that: It includes a base film layer, an interlayer layer and an inkjet functional layer; The interlayer is arranged above the base film layer, and the inkjet functional layer is located above the interlayer; The interlayer includes convex lenses, which are evenly arranged on the base film layer and fixed on both sides of the convex lenses by optical glue; The inkjet functional layer is located above the optical glue on the upper side of the convex lens.

2. The naked eye anti-smudge electronic device screen protective film according to claim 1, characterized in that: The base film layer is a base film material with high transparency and high hardness, including polyethylene terephthalate and polyimide.

3. The naked eye anti-smudge electronic device screen protective film according to claim 2, characterized in that: The base film layer has a thickness of 50 to 150 μm, a light transmittance of ≥90%, and a haze of <1%.

4. The naked eye anti-smudge electronic device screen protective film according to claim 1, characterized in that: The material of the convex lens includes polymethyl methacrylate, polycarbonate and silicone / UV curing glue. When silicone / UV curing glue is used, the weight ratio of silicone to UV curing glue is 1:1; the optical glue includes UV curing glue and OCA optical glue.

5. The naked eye anti-smudge electronic device screen protective film according to claim 4, characterized in that: The thickness of the interlayer is 20-80 μm; the diameter of the convex lens is 0.1-1 mm, and the hexagonal close-packed or rectangular arrangement has a spacing of 1.1-1.5 times the diameter; the thickness of the convex lens is 10-50 μm, and the thickness of the optical glue layer on both sides of the convex lens is 5-15 μm.

6. The naked eye anti-smudge electronic device screen protective film according to claim 1, characterized in that: The inkjet functional layer includes a base layer and a functional layer. The base layer material includes UV curing glue, silica gel and acrylic resin. The thickness of the base layer is 5-10 μm.

7. The naked eye anti-smudge electronic device screen protective film according to claim 6, characterized in that: The functional layer comprises an anti-blue light coating and an anti-fingerprint coating; the total thickness of the inkjet functional layer is 10 to 30 μm.

8. The method for preparing a screen protective film according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Apply a layer of optical glue on the surface of the base film layer and cure it; S2, arranging the convex lenses evenly on the optical glue, and after the arrangement is completed, covering the convex lenses with another layer of optical glue, and then curing; S3. Arranging an inkjet functional layer on the surface of the cured optical glue to obtain the screen protective film of the present invention.

9. The method for preparing a screen protective film according to claim 8, characterized in that: In the above-mentioned S2, the convex lens is formed by inkjet printing.

10. The method for preparing a screen protective film according to claim 8, characterized in that: In the above-mentioned S1-S3, the surface of the base film layer, the surface of the optical glue after curing, and the surface of the base layer in the inkjet functional layer need to be treated by plasma surface treatment technology.

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