TWM556670U - Screen protector for an electrical device having a curved screen - Google Patents

Abstract

A protective sticker for an electronic device having a curved screen, comprising: a transparent film; an optical adhesive layer having ultraviolet light curing and/or thermoplasticity formed on one side of the transparent film; wherein the protective sticker is provided for bonding The curved surface of the electronic device, and the transparent film corresponds to the size of the curved screen; wherein the optical adhesive layer with ultraviolet curing and/or thermoplasticity can form a molten state by heating to fill the curved surface and the step on the curved screen, so that the transparent The film conforms to the curved screen and is cured by UV irradiation to cure the optical adhesive layer with UV curing and/or thermoplasticity to the curved screen.

Description

Protective sticker for electronic devices with curved screens

This creation is about a protective sticker, especially a protective sticker applied to an electronic device with a curved screen.

In recent years, electronic products with large screens such as smart phones and tablet devices have been widely used by the public, and screen protectors used to protect the screens have also been born.

The way to attach the screen to the screen of the electronic device in the early days is mainly the glue-bonding (also called "frame sticker", edge lamination, air bonding, air gap, etc.), which is through the double-sided tape. The Touch Sensor Panel (TSP) is attached to the four sides of the Cover Lens. The advantage of the word-fitting adhesive is that the work is easy, the cost is low, and the technical threshold is low. The disadvantage is that only the four sides are attached, and the air gap is easily generated in the middle of the screen after the bonding, and the light refraction produces a superimposed image. Affect the screen presented by the screen.

In order to solve the above-mentioned shortcomings of the frame, a full-surface fit (also known as "face-to-face", full lamination, direct bonding, optical bonding, non-air gap) has been developed, which utilizes OCA (Optically Clear Adhesive, Solid transparent optical glue) or OCR (Optically Clear Resin, liquid transparent optical adhesive) completely adheres the glass protective layer to the touch panel. Since the glass protective layer is completely adhered to the touch panel without any gaps and air layers formed therein, the backlight of the display panel can penetrate the glass surface smoothly, and the overlapping phenomenon caused by the light refraction can be reduced to present The high brightness of the high quality, while also reducing the overall thickness.

In order to make consumers have a better visual experience to enjoy the photos and videos presented on the electronic device, some manufacturers have developed electronic devices with curved screens. However, when the user wants to stick the protective stickers on the electronic devices with curved screens. In order to protect the screen, the screen often has a curvature relationship, so that the protective sticker can not completely fit the screen, even if it is a full-surface fit, a white edge is formed on the edge of the protective sticker.

Therefore, how to propose a new technology so that the protective sticker can be completely attached to the electronic device with a curved screen is a problem that needs to be solved today.

In view of the shortcomings of the prior art, the present invention proposes a protective sticker for an electronic device having a curved screen, comprising: a transparent film; an optical adhesive layer having ultraviolet light curing and/or thermoplasticity, formed in one of the transparent films a side surface; wherein the protective layer is attached to a curved screen of an electronic device, and the transparent film corresponds to a size of the curved screen; wherein the optical adhesive layer having ultraviolet curing and/or thermoplasticity forms a molten state by heating Fill the curved surface and the step on the curved screen so that the transparent film fits snugly on the curved screen. The excess molten rubber can be extruded during the bonding process and UV-cured and UV-cured and/or The thermoplastic optical layer is cured and glued to the curved screen, and the excess glue is removed without creating a white edge around the curved screen.

10‧‧‧Protection stickers for electronic devices with curved screens

20‧‧‧Transparent film

30‧‧‧Optical adhesive layer with UV curing and/or thermoplasticity

40‧‧‧Electronic devices

41‧‧‧ curved screen

FIG. 1A to FIG. 1C are schematic diagrams showing the flow of a protective screen for an electronic device having a curved screen and attached to a curved screen of an electronic device.

In order to give your reviewers a better understanding and understanding of the characteristics of the creation and the efficacies achieved, please provide detailed explanations and detailed descriptions. Please refer to Figure 1A~1C for details. A flow chart for creating a protective sticker for an electronic device having a curved screen attached to a curved surface of an electronic device.

The protective cover 10 for an electronic device having a curved screen of the present invention comprises a transparent film 20 and an optical adhesive layer 30 having ultraviolet light curing and/or thermoplasticity formed on one side surface of the transparent film 20.

The material of the transparent film 20 may be, for example, glass such as indium tin oxide (ITO) or plastic such as PET, TPU or PP.

The material of the optical adhesive layer 30 having ultraviolet curing and/or thermoplasticity may comprise ethylene-vinyl acetate copolymer (EVA), ethylene-octene copolymer (POE), polyvinyl butyral (PVB) or the like. The combination. The optical adhesive layer 30 having ultraviolet light curing and/or thermoplasticity does not have viscosity at room temperature, but is heated to produce a molten state, and when irradiated with light of a specific wavelength, crosslinking and solidification can be caused.

In one embodiment, an optical adhesive layer having ultraviolet light curing and/or thermoplasticity 30 may be coated on one side surface of the transparent film 20.

As shown in FIG. 1B, the protective sticker 10 is attached to the curved screen 41 of an electronic device 40. The transparent film 20 has been pre-cut to correspond to the size of the curved screen 41. When the transparent film 20 is formed to have ultraviolet curing. And after the side surface of one of the thermoplastic optical adhesive layers 30 is attached to the curved screen 41, the optical adhesive layer 30 having ultraviolet curing and/or thermoplasticity can be heated to form a molten state, thereby having The UV-curable and/or thermoplastic optical adhesive layer 30 can flow to fill the curved surface of the curved screen 41, the edge of the curved screen 41, and repair the fine scratches of the glass of the curved screen 41. The heating process may be performed, for example, by providing a heat source between 60 degrees Celsius and 80 degrees Celsius, and applying a low pressure of 0.05 to 0.5 atmosphere pressure to the transparent film to enable the optical adhesive layer 30 having ultraviolet curing and/or thermoplasticity. The bubbles between the transparent film 20 and the curved screen 41 are excluded while the molten state is formed. The electronic device 40 can be, for example, a watch, a mobile phone, a tablet, a screen of a personal computer, or a liquid crystal television.

As shown in FIG. 1C, after the protective sticker 10 is completely conformed to the curved screen 41, the optical adhesive layer 30 having ultraviolet curing and/or thermoplasticity formed in a molten state can be cured, for example, The transparent film 20 is irradiated with ultraviolet light to induce a light-causing agent in the composition of the optical adhesive layer 30 having ultraviolet light curing and/or thermoplasticity to be cross-linked to generate viscosity, or to be cured by ultraviolet light and/or by heating. The peroxide in the thermoplastic optical layer 30 reacts to form a thermoset phenomenon.

The attaching, melting and curing process can be carried out in a laminating machine (not shown). The laminating machine can comprise a supporting platform for fixing an electronic device to be attached with a protective film, and a pressing unit pair. The protective tape attached to the electronic device is pressurized, and a heating unit heats the protective sticker attached to the electronic device to form the optical adhesive layer 30 having ultraviolet curing and/or thermoplasticity into a molten state. And a curing unit can provide an optical adhesive layer 30 having ultraviolet curing and/or thermoplasticity in a molten state by heating or irradiating ultraviolet light.

The full-screen screen protector used in the prior art is usually an OTC (Optically Clear Adhesive) or an OTP (Optically Clear Resin), but an electronic device having a curved screen is available. After that, as the curvature of the curved screen increases, use OCA Because the screen protector is a solid material, it is inefficient in filling the step and fine cracks, so it cannot be completely attached to the curved screen. However, the liquid OCR can overcome the filling efficiency problem, but it is easy to flow glue and bubbles. In addition, the protective film base rubber has a white edge formed by excess glue on the edge of the curved screen due to tolerance problems, which is more serious after the curvature of the screen is increased. The optical adhesive layer 30 with ultraviolet curing and/or thermoplasticity used in the creative protective tape can be formed into a molten state by heating to efficiently fill the curved surface and the step of the curved surface 41, thereby effectively solving the conventional full-surface sticking method. The protector does not fit completely into the shortcomings of the curved screen. In addition, excess glue can be extruded during the bonding process and then removed after curing to avoid white edges.

In addition, the conventional alignment method requires a very high alignment accuracy, so the bonding procedure is complicated and the failure rate is high. The procedure of the creative protection sticker attached to the curved screen of the electronic device is generally only attached, melted, and Curing and other processes not only make the fitting process simple, but also reduce the cost and maintenance cost of the required process equipment relative to the full-surface sticking legal equipment.

Furthermore, the material of the optical adhesive layer 30 having ultraviolet curing and/or thermoplasticity may be, for example, ethylene-vinyl acetate copolymer (EVA), ethylene-octene copolymer (POE), polyvinyl butyral (PVB). Or a combination of the above materials has good water resistance and airtightness to prevent water or air from entering between the protective sticker 10 and the curved screen 41. Optical with UV curing and/or thermoplasticity The glue layer 30 may have a light transmittance of more than 96% and a refractive index of 1.47 to 1.5 which is close to the glass of the curved screen, so that the refractive phenomenon is less likely to occur. The optical adhesive layer 30 having ultraviolet light curing and/or thermoplasticity also has an explosion-proof function, and the strength against tension is much better than OCA, so the procedure for attaching the explosion-proof film can be omitted. The thermoplastic optical adhesive layer 30 can be applied to various materials and has good adhesion to various materials. The protective tape made of the optical adhesive layer 30 with ultraviolet curing and/or thermoplasticity can have a production yield of more than 95%. If a defective product is present, the protective sticker can be recycled back to the original factory and will have ultraviolet curing. And/or the thermoplastic optical layer 30 is removed and reworked, thereby greatly reducing production costs.

However, the above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and the variations, modifications, and modifications of the shapes, structures, features, and spirits described in the scope of the patent application. , should be included in the scope of the patent application of this creation.

Claims (10)

A protective sticker for an electronic device having a curved screen, comprising: a transparent film; an optical adhesive layer having ultraviolet light curing and/or thermoplasticity formed on one side of the transparent film; wherein the protective sticker is attached On the curved screen of the integrated electronic device, and the transparent film corresponds to the size of the curved screen; wherein the optically cured and/or thermoplastic optical adhesive layer is formed by heating to form a molten state to fill the curved screen. The curved surface and the step are such that the transparent film conforms to the curved screen, and the optically cured and/or thermoplastic optical adhesive layer is cured to be glued to the curved screen. The protective tape for an electronic device having a curved screen according to claim 1, wherein the transparent film is attached to the curved screen, and the excess adhesive of the optical curing layer having ultraviolet curing and/or thermoplasticity is It is extruded and is removed after the optically cured and/or thermoplastic optical adhesive layer is cured and glued to the curved screen. The protective tape for an electronic device having a curved screen according to claim 1, wherein the material of the optical curing layer having ultraviolet curing and/or thermoplasticity comprises ethylene-vinyl acetate copolymer (EVA) and ethylene-octene copolymerization. (POE), polyvinyl butyral (PVB) or a combination of the above. The protective tape for an electronic device having a curved screen according to claim 1, wherein the optical adhesive layer having ultraviolet curing and/or thermoplasticity has water repellency and airtightness. The protective tape for an electronic device having a curved screen according to claim 1, wherein the optical adhesive layer having ultraviolet curing and/or thermoplasticity has a refractive index of about 1.47 to 1.5. The protective tape for an electronic device having a curved screen according to claim 1, wherein the material of the transparent film comprises glass or plastic. The protective tape for an electronic device having a curved screen according to claim 1, wherein the curing mode of the optically cured and/or thermoplastic optical adhesive layer comprises curing by curing by ultraviolet light or heating. The protective tape for an electronic device having a curved screen according to claim 1, wherein the optical adhesive layer having ultraviolet curing and/or thermoplasticity has a light transmittance of more than 96%. The protective tape for an electronic device having a curved screen according to claim 1, wherein the optical adhesive layer having ultraviolet curing and/or thermoplasticity is coated on the one side surface of the transparent film. The protection device for an electronic device having a curved screen according to claim 1, which can be combined with a bonding machine, comprising: a supporting platform for fixing the electronic device; and a pressing unit for protecting the electronic device Pressing the pressure; a heating unit heats the protective tape attached to the electronic device to form the optical adhesive layer having ultraviolet curing and/or thermoplasticity into a molten state; and a curing unit provides heating or ultraviolet light irradiation The optical adhesive layer having ultraviolet light curing and/or thermoplasticity is cured in a molten state.