Curved surface cover plate capable of avoiding anti-reflection chromatic aberration and touch screen

Abstract

The utility model discloses a curved surface cover plate capable of avoiding anti-reflection chromatic aberration, comprising a cover plate body which comprises a flat plate area and a bending area, the flat plate area is a visual area, and the bending area is a frame area; the frame printing ink is arranged on the back surface of the cover plate body and at least covers the bending area; the anti-reflection film is arranged on the back face of the cover plate body and at least covers the flat plate area. According to the curved surface cover plate, the influence of the chromatic aberration problem of the anti-reflection film in the bending area on the appearance of the cover plate can be avoided. The utility model further discloses a touch screen which comprises the curved surface cover plate.

Description

Technical Field

[0001] The utility model relates to an anti-reflection technology, in particular to a curved cover plate and a touch screen for avoiding anti-reflection chromatic aberration. Background Art

[0002] Anti-reflective Coating (ARC) is an optical film used to reduce the reflection of light on the surface of a material. This film is usually applied to optical components such as eyeglass lenses, camera lenses, microscopes, etc. to reduce the reflection of light, increase light transmittance, and thus improve visual clarity. The working principle of anti-reflective coating is to add one or more layers of thin films with a specific thickness and refractive index to the surface of the material so that the reflected light waves interfere at the interface and cancel each other out, thereby achieving the purpose of reducing reflection. These films can be metal oxides, fluorides, or other materials. The thickness of the anti-reflective film is usually one-quarter of the wavelength of light, so that the reflected light waves can reverse their phase when returning to the air and destructively interfere with the incident light waves.

[0003] Since there is a curved area on the curved cover plate, when the anti-reflection film is applied to the curved cover plate, there will be an uneven coating problem on the curved area of ​​the curved cover plate, which will affect the light coherence effect. At the same time, the anti-reflection film will bend with the curved cover plate, which will also affect the light coherence effect, and ultimately cause the anti-reflection film to have a chromatic aberration problem on the curved area of ​​the curved cover plate. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a curved cover plate and a touch screen, which can avoid the influence of the color difference problem of the anti-reflection film in the curved area on the appearance of the cover plate.

[0005] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0006] A curved cover plate for avoiding anti-reflection chromatic aberration, comprising:

[0007] The cover body includes a flat area and a curved area, wherein the flat area is a visible area and the curved area is a frame area;

[0008] Frame ink, disposed on the back side of the cover body and covering at least the curved area;

[0009] The anti-reflection film is disposed on the back surface of the cover body and at least covers the flat plate area.

[0010] Furthermore, the anti-reflection film is also arranged on the back side of the frame ink.

[0011] Furthermore, the anti-reflection film includes a plurality of high-refractive-index films and a plurality of low-refractive-index films, and the plurality of high-refractive-index films and the plurality of low-refractive-index films are stacked in sequence with intervals therebetween.

[0012] Furthermore, the high refractive index film is a titanium dioxide film, a zinc sulfide film, a silicon nitride film or a tin-doped indium oxide film.

[0013] Furthermore, the low refractive index film is a silicon dioxide film, a magnesium fluoride film, an aluminum oxide film or a nanoporous silicon oxide film.

[0014] Furthermore, there are two bending areas, and the two bending areas are respectively connected to two opposite sides of the flat plate area.

[0015] Furthermore, the curved cover plate also includes at least one of an anti-glare film and an anti-fingerprint film, and the anti-glare film or the anti-fingerprint film is arranged on the front side of the cover plate body and covers the flat area and the curved area at the same time.

[0016] Furthermore, the thickness of the frame ink is 8-16 μm.

[0017] Furthermore, the frame ink is black ink.

[0018] A touch screen comprises a touch function layer and the above-mentioned curved cover plate, wherein the touch function layer is arranged on the back side of the curved cover plate.

[0019] The utility model has the following beneficial effects: the curved cover plate of the utility model arranges the anti-reflection film on the back side of the cover plate body, and the curved area of ​​the cover plate body is covered and shielded by the frame ink as a frame area, so that even if the anti-reflection film has problems such as uneven coating in the curved area or bends together with the cover plate, which affects the light coherence effect, it will not be seen because it is covered and shielded by the frame ink, which can avoid the influence of the color difference problem of the anti-reflection film in the curved area on the appearance of the cover plate; because the anti-reflection film only needs to reduce the reflectivity of the visible area, the anti-reflection film does not need to cover the curved area, but only covers the flat area. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front structural schematic diagram of the curved cover provided by the utility model.

[0021] Figure 2 A schematic diagram of the stacking structure of the curved cover plates provided by the utility model.

[0022] Figure 3 This is a schematic diagram of the stacking structure of the anti-reflection film in the curved cover plate provided by the utility model.

[0023] Figure 4 A schematic diagram of the stacking structure of another curved cover plate provided by the utility model.

[0024] Figure 5 This is a schematic diagram of the stacking structure of the touch screen provided by the utility model. DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Embodiment 1

[0030] like Figure 1 and 2 As shown, a curved cover plate for avoiding anti-reflection chromatic aberration comprises:

[0031] The cover body 10 includes a flat area 11 and a curved area 12, wherein the flat area 11 is a visible area 13, and the curved area 12 is a frame area 14;

[0032] The frame ink 20 is disposed on the back surface of the cover body 10 and at least covers the bending area 12;

[0033] The anti-reflection film 30 is disposed on the back surface of the cover body 10 and at least covers the flat plate area 11 .

[0034] The curved cover plate of the present invention arranges the anti-reflection film 30 on the back side of the cover plate body 10, and the curved area 12 of the cover plate body 10 is covered and shielded by the frame ink 20 as the frame area 14. In this way, even if the anti-reflection film 30 has problems such as uneven coating in the curved area 12 or bends with the cover plate, which affects the light coherence effect, it will not be seen because it is covered and shielded by the frame ink 20, which can avoid the influence of the color difference problem of the anti-reflection film 30 in the curved area 12 on the appearance of the cover plate; since the anti-reflection film 30 only needs to reduce the reflectivity of the visible area 13, it does not need to cover the curved area 12, but only covers the flat area 11.

[0035] The frame ink 20 may also cover the periphery of the flat panel area 11 to define the visible area 13 on the flat panel area 11 .

[0036] Of course, if the anti-reflection film 30 covers the curved area 12 at the same time, the anti-reflection film 30 is also disposed on the back side of the frame ink 20 .

[0037] The curved cover plate of the present invention arranges the anti-reflection film 30 on the back side of the curved cover plate, and the curved area 12 of the cover plate body 10 is covered and shielded by the frame ink 20 as the frame area 14. In this way, even if the anti-reflection film 30 has problems such as uneven coating in the curved area 12 or bends with the cover plate, which affects the light coherence effect, it will not be seen because it is covered and shielded by the frame ink 20, which can avoid the influence of the color difference problem of the anti-reflection film 30 in the curved area 12 on the appearance of the cover plate.

[0038] like Figure 3 As shown, the anti-reflection film 30 includes a plurality of high refractive index films 31 and a plurality of low refractive index films 32 , and the plurality of high refractive index films 31 and the plurality of low refractive index films 32 are stacked in sequence with intervals therebetween.

[0039] The anti-reflection film 30 is composed of a plurality of high refractive index films 31 and a plurality of low refractive index films 32 stacked in sequence. Since the high refractive index films 31 and the low refractive index films 32 have different refractive indices for light, the incident light will be reflected at the interface between the adjacent high refractive index films 31 and the low refractive index films 32. The wavelength of the reflected light is related to the film thickness of the refractive index films 31 and the low refractive index films 32. By matching the thickness of the high refractive index films 31 and the low refractive index films 32, the optical path difference between adjacent reflected light rays is made to be one quarter of a wavelength, and the reflected light rays will interfere with each other and cancel each other out, thereby achieving the purpose of reducing the reflectivity.

[0040] Among them, the high refractive index film 31 can be but not limited to titanium dioxide film, zinc sulfide film, silicon nitride film or tin-doped indium oxide film, and the low refractive index film 32 can be but not limited to silicon dioxide film, magnesium fluoride film, aluminum oxide film or nanoporous silicon oxide film.

[0041] The thickness of the high refractive index film 31 and the low refractive index film 32 vary according to their specific materials. Generally, the thickness of the high refractive index film 31 is between 50-70 nm, and the thickness of the low refractive index film 32 is between 90-110 nm.

[0042] In this embodiment, there are two curved areas 12 , which are respectively connected to two opposite sides of the flat area 11 , and the anti-reflection film 30 covers at least the back side of the frame ink 20 of one of the curved areas 12 .

[0043] The frame ink 20 is black ink, and its OD value (absorbance) should be guaranteed to be above 4 to meet the light-shielding effect. The thickness of the frame ink 20 is between 8-16 μm, and the number of layers is at least two. If the material of the frame ink 20 has a low light-shielding property, the thickness of the frame ink 20 can be appropriately increased. If the material of the frame ink 20 has a high light-shielding property, the thickness of the frame ink 20 can be appropriately reduced, and it should not be limited to this.

[0044] The black ink uses carbon black as a colorant, which is mixed in an ink base material and formed on the surface of the cover body 10 through a silk screen printing process. It has the characteristics of high density, high viscosity, high hiding power, etc. It has good printability, can be printed on various substrates, and has good weather resistance and durability.

[0045] In this embodiment, the cover body 10 may be, but is not limited to, a glass cover, a plastic cover or a sapphire cover, and the thickness thereof is between 0.7-2.0 mm.

[0046] Embodiment 2

[0047] As an optimization solution of the first embodiment, in this embodiment, if Figure 4 As shown, the curved cover plate further includes at least one of an anti-glare film 40 and an anti-fingerprint film 50 , and the anti-glare film 40 or the anti-fingerprint film 50 is disposed on the front surface of the cover plate body 10 and covers both the flat area 11 and the curved area 12 .

[0048] The anti-glare film 40 is a special surface treatment film, and its main function is to reduce the concentration of reflected light generated on the surface, thereby improving visual comfort and clarity of displayed content. The anti-glare film 40 scatters incident light, converts light that may produce strong specular reflection into diffuse reflection or weak reflection, effectively suppresses the glare caused by direct light and ambient light, and helps improve contrast and color saturation by reducing reflectivity. Even in a strong light environment, it can maintain the clarity and realism of the image and reduce eye fatigue.

[0049] The anti-fingerprint film 50 is a special protective film, which is mainly designed to reduce the visibility of fingerprints and oil stains on the touch screen or other surfaces. The design principle of the anti-fingerprint film 50 is to disperse the texture of fingerprints through special materials and processes, so that fingerprints are not easily displayed on the screen, thereby achieving an anti-fingerprint effect. The materials used in the anti-fingerprint film 50 may include organic fluorides, etc. These materials are deposited on the substrate through vacuum coating technology, giving the surface waterproof, oil-proof, scratch-proof, anti-fingerprint and anti-pollution properties. Some anti-fingerprint films 50 achieve the effect by applying a frosted particle layer on the surface of the protective film. The larger the frosted particles, the more obvious the anti-fingerprint effect, but the clarity may be reduced. Some anti-fingerprint films 50 use quantitative factor fingerprint decomposition technology to add oily decomposition factors to the surface of the protective film so that fingerprints formed by oil stains and sweat can be quickly taken away by the air, reducing the scattering and blurring caused by fingerprints. With the development of technology, the fuzziness of the frosted particle layer can be reduced, maintaining a high transmittance and screen clarity. The anti-fingerprint film 50 is not only anti-fingerprint, but also has the characteristics of wear resistance, rainbow pattern prevention, and high light transmittance.

[0050] Embodiment 3

[0051] like Figure 5 As shown, a touch screen comprises a touch function layer 3 and the curved cover plate 1 described in the first or second embodiment, wherein the touch function layer 3 is arranged on the back side of the curved cover plate 1 .

[0052] In this embodiment, the touch function layer 3 is adhered to the back surface of the curved cover plate 1 by means of OCA optical adhesive 2 .

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A curved cover plate for avoiding anti-reflection chromatic aberration, characterized in that: include: The cover body includes a flat area and a curved area, wherein the flat area is a visible area and the curved area is a frame area; Frame ink, disposed on the back side of the cover body and covering at least the curved area; The anti-reflection film is disposed on the back surface of the cover body and at least covers the flat plate area.

2. The curved cover plate according to claim 1, characterized in that: The anti-reflection film is also arranged on the back side of the frame ink.

3. The curved cover plate according to claim 1, characterized in that: The anti-reflection film comprises a plurality of high-refractive-index films and a plurality of low-refractive-index films, and the plurality of high-refractive-index films and the plurality of low-refractive-index films are stacked in sequence with intervals.

4. The curved cover plate according to claim 3, characterized in that: The high refractive index film is a titanium dioxide film, a zinc sulfide film, a silicon nitride film or a tin-doped indium oxide film.

5. The curved cover plate according to claim 3 or 4, characterized in that: The low refractive index film is a silicon dioxide film, a magnesium fluoride film, an aluminum oxide film or a nanoporous silicon oxide film.

6. The curved cover plate according to claim 1, characterized in that: There are two bending areas, and the two bending areas are respectively connected to two opposite sides of the flat plate area.

7. The curved cover plate according to claim 1, characterized in that: The curved cover plate further includes at least one of an anti-glare film and an anti-fingerprint film, wherein the anti-glare film or the anti-fingerprint film is arranged on the front surface of the cover plate body and covers the flat area and the curved area at the same time.

8. The curved cover plate according to claim 1, characterized in that: The thickness of the frame ink is 8-16 μm.

9. The curved cover plate according to claim 1, characterized in that: The frame ink is black ink.

10. A touch screen, characterized in that: It comprises a touch function layer and the curved cover plate according to claim 1, wherein the touch function layer is arranged on the back side of the curved cover plate.

Images