Folding screen surface film

Abstract

Regarding the technical field of protective films, a surface film for a folding screen is disclosed. [Solution] The surface film of the folding screen includes an anti-reflective layer 1, a hardening layer 2, a base layer 3, and an adhesive layer, which are layered and bonded from top to bottom. The adhesive layer has its bottom surface attached to the surface of the folding screen and has different adhesive properties. It is divided into a high-adhesion portion 5 in the middle and low-adhesion portions 4 on both sides. The high-adhesion portion is in the form of a strip and corresponds to the folding point of the folding screen, and its adhesiveness is higher than that of the low-adhesion portion. By using adhesive layers with different adhesive properties to bond to the screen, and by having different thicknesses of adhesive layers, the problem of stress concentration that occurs at the folding point of the screen can be greatly reduced, the bonding effect is not affected even after multiple uses, and the service life of the bonded film is greatly extended.

Description

Technical Field

[0001] The present invention relates to the technical field of protective films, and particularly to the surface film of a folding screen.

Background Art

[0002] Currently, folding mobile phones are becoming increasingly popular and attracting attention as a new fashion among many consumers. Since the screen when unfolded is large and becoming lighter and thinner, they are favored by people. However, in folding mobile phones, it is very difficult to attach a film, so they have to be used without attaching a protective film. In the case of collision or dirt, the fact that a protective film cannot be attached is a very difficult problem to solve and a major weakness of folding mobile phones. According to investigations, currently, no sticking film suitable for folding mobile phones has appeared in the market. The main reason is that there is a bending part in the middle of the screen of a folding mobile phone. After attaching the film, stress concentration is likely to occur at this bending part. After being folded multiple times, bubbles and detachment are likely to occur in the sticking film, and eventually breakage occurs, seriously affecting the service life of the sticking film. Also, in sticking films, if all use high-adhesive adhesives, it is difficult to automatically discharge bubbles when attaching the film, and the success rate of attachment is very low. If all use low-adhesive adhesives, bubbles can be automatically discharged, but due to the influence of folding stress during use, the adhesive is likely to peel off from the screen, directly affecting the service life.

Summary of the Invention

Problems to be Solved by the Invention

[0003] An object of the present invention is to provide a surface film for a folding screen in order to solve the problems presented in the background art.

Means for Solving the Problems

[0004] To achieve the above object, the present invention provides the following technical means.

[0005] The surface film of the folding screen includes an anti-reflective layer, a hardening layer, a base layer, and an adhesive layer, which are layered and bonded from top to bottom. The adhesive layer has its bottom surface attached to the surface of the folding screen and has different adhesive properties, divided into a high-adhesion portion in the middle and low-adhesion portions on both sides. The high-adhesion portion is in the form of a strip, corresponds to the folding point of the folding screen, and has higher adhesiveness than the low-adhesion portion.

[0006] In a further embodiment, the thickness of the highly adhesive portion is less than the thickness of the low adhesive portion.

[0007] In a further embodiment, the adhesive layer is a silica gel layer having an adhesive surface, and the highly adhesive portion has a width equal to or greater than the width of the folded portion of the folding screen.

[0008] In a further embodiment, before the film is attached, a removable release layer is attached to the bottom surface of the adhesive layer, with handles protruding from the corners of the release layer.

[0009] In a further embodiment, the release layer is also divided into three parts corresponding to the highly adhesive portion and the low adhesive portion of the adhesive adhesive layer, respectively.

[0010] In further embodiments, the surface of the anti-reflective layer is subjected to a fingerprint-resistant treatment, and the hardening layer is subjected to an anti-glare treatment.

[0011] In further embodiments, the surface of the substrate layer is subjected to a textured hardening treatment.

[0012] In further embodiments, the substrate layer is a film body formed by applying an anti-reflective (AR) treatment, anti-glare (AG) treatment, blue light cut treatment, privacy protection treatment, anti-fingerprint treatment, scratch protection treatment, or self-healing treatment, or handwriting-like treatment to the surface of glass, UTG, PET film, PC film, PMMA film, or TAC film. [Effects of the Invention]

[0013] Compared to conventional technology, the beneficial effects of this invention are as follows:

[0014] In this invention, adhesive layers with different tackiness are used to bond the film to the screen, and the thickness of the adhesive layers also varies. This significantly reduces the problem of stress concentration that occurs at the bending points of the screen, does not affect the bonding effect even after multiple uses, and greatly extends the service life of the bonded film. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic cross-sectional view of the surface film of the folding screen of the present invention. [Modes for carrying out the invention]

[0016] In this description of the present invention, unless otherwise explicitly stated or limited, the terms “attachment,” “connection,” and “connection” should be understood in a broad sense, and may include, for example, a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection, an indirect connection via an intermediate medium, or internal communication between two elements. Those skilled in the art will be able to understand the specific meaning of these terms in the present invention depending on the specific circumstances.

[0017] The technical means in the embodiments of the present invention will be described clearly and completely below with reference to the drawings of the embodiments. Clearly, the embodiments described are only a part of the present invention, not the entirety. All other embodiments that can be obtained by those skilled in the art without creative work based on the embodiments of the present invention are all within the scope of the protection of the present invention.

[0018] As shown in Figure 1, the surface film of the folding screen includes an anti-reflective layer 1, a hardening layer 2, a base layer 3, and an adhesive layer, which are layered and bonded from top to bottom. The adhesive layer has its bottom surface attached to the surface of the folding screen and has different adhesive properties. It is divided into a high-adhesion portion 5 in the middle and low-adhesion portions 4 on both sides. The high-adhesion portion 5 is in the shape of a strip and corresponds to the folding point of the folding screen, and its adhesiveness is higher than that of the low-adhesion portion 4. The thickness of the high-adhesion portion 5 is less than the thickness of the low-adhesion portion 4. In this embodiment, the adhesive layer is a silica gel layer having an adhesive surface, and the width of the high-adhesion portion 5 is greater than or equal to the width of the folding point of the folding screen.

[0019] Before the film is applied, a removable release layer (not shown) is attached to the bottom surface of the adhesive layer. Handles protrude from the corners of the release layer, making it easier to directly pull and use the release layer when peeling it off. The release layer is also divided into three parts corresponding to the high-tack portion 5 and low-tack portion 4 of the adhesive layer, making it easier to peel off the release layer in stages.

[0020] The surface of the anti-reflective layer 1 is treated with an anti-fingerprint coating, and the hardening layer 2 is treated with an anti-glare coating. The surface of the base layer 3 is treated with an uneven hardening coating. The base layer 3 is a film body formed by applying an anti-reflective (AR) coating, anti-glare (AG) coating, blue light cut coating, privacy coating, anti-fingerprint coating, scratch-resistant coating or self-healing coating, or handwriting-like coating to the surface of glass, UTG, PET film, PC film, PMMA film, or TAC film.

[0021] In this embodiment, the anti-reflective layer 1 is an optical film (AR film) that primarily reduces light reflection and improves light transmittance, thereby improving visibility and comfort. The AR film's operating principle is mainly based on the phenomenon of light interference, and it can effectively improve the utilization rate and transmittance of light rays. Its main functions include improved display effect, which improves the visibility of the screen in bright light environments by significantly reducing reflectance through the anti-reflective coating of the AR film; increased light transmittance, which reduces reflected light from the optical surface and increases the amount of light transmitted; and wide color gamut reduction, which effectively reduces the reflection of ambient light on the screen surface and maintains the clarity of the screen by utilizing multilayer optical coating technology.

[0022] The base layer 3 (PET film) is a transparent plastic film made of polyethylene terephthalate, which has excellent physical properties, high transparency, and superior mechanical properties.

[0023] The high-tack portion 5 of the adhesive layer of this invention relieves stress when folded, preventing the film from lifting, while the low-tack portion 4 makes it easier to handle when applying the film. By using adhesive layers with different tackiness levels and varying thicknesses of the adhesive layers to bond to the screen, the problem of stress concentration at the folding points of the screen can be significantly reduced, and the bonding effect is not affected even after multiple uses, greatly extending the service life of the bonded film.

[0024] The present invention is not limited to the details of the above exemplary embodiments, and it is obvious to those skilled in the art that the present invention can be realized in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the scope of the present invention, which should be regarded as exemplary and non-limiting in all respects, is not limited to the above description, but is limited by the appended utility model registration claims. For this reason, it is intended to cover all changes within the meaning and scope of the equivalent requirements of the utility model registration claims. Any reference numerals in the relevant drawings within the scope of the utility model registration claims should not be regarded as limiting the scope of the utility model registration claims.

[0025] In addition, although this specification has been described based on the embodiments, each embodiment does not only include one independent technical means. Such a description method in the specification is only for clarity. Those skilled in the art should understand that, as a whole, the specification can appropriately combine the technical means in each embodiment to form other embodiments that can be understood by those skilled in the art.

Description of Reference Numerals

[0026] 1 Anti-reflection layer 2 Hardening layer 3 Substrate layer 4 Low-adhesion part 5 High-adhesion part

Claims

1. It includes an anti-reflective layer, a hardening layer, a base layer, and an adhesive layer, which are layered and bonded together from top to bottom. The aforementioned adhesive layer has its bottom surface attached to and fixed to the surface of the folding screen, and has different levels of adhesion, divided into a high-adhesion portion in the middle and low-adhesion portions on both sides. The aforementioned high-adhesion portion is in the form of a strip, corresponds to the folding point of the folding screen, and has higher adhesiveness than the aforementioned low-adhesion portion. A surface film for a folding screen characterized by the following features.

2. The high-adhesion portion has a thickness less than the thickness of the low-adhesion portion. The surface film of the folding screen according to feature 1.

3. The aforementioned adhesive layer is a silica gel layer having an adhesive surface. The aforementioned highly adhesive portion has a width equal to or greater than the width of the folding portion of the folding screen. The surface film of the folding screen according to feature 1.

4. Before the film is applied, a removable release layer is attached to the bottom surface of the adhesive layer, and handles protrude from the corners of the release layer. The surface film of the folding screen according to feature 1.

5. The release layer is also divided into three parts, corresponding to the highly adhesive portion and the low adhesive portion of the adhesive adhesive layer, respectively. The surface film of the folding screen according to feature 4.

6. The surface of the anti-reflective layer is treated to prevent fingerprints. The hardened layer is subjected to an anti-glare treatment. The surface film of the folding screen according to feature 1.

7. The surface of the substrate layer is subjected to a textured hardening treatment. The surface film of the folding screen according to feature 1.

8. The aforementioned substrate layer is a film body formed by applying an anti-reflective (AR) treatment, anti-glare (AG) treatment, blue light cut treatment, privacy protection treatment, fingerprint protection treatment, scratch protection treatment, self-healing treatment, or handwriting-like treatment to the surface of glass, UTG, PET film, PC film, PMMA film, or TAC film. The surface film of the folding screen according to feature 1.

Images