Invisible logo cover plate

Abstract

The utility model discloses an invisible logo cover plate which comprises a glass cover plate, the glass cover plate comprises a logo area and a non-logo area, and a logo pattern is arranged on the surface of the logo area; the display layer is arranged on the lower surface of the glass cover plate; the logo pattern is formed by alternately stacking low-refractive-index films and high-refractive-index films, and at least three layers of the low-refractive-index films and three layers of the high-refractive-index films are arranged. The low-refractive-index films and the high-refractive-index films with different refractive indexes are alternately arranged on the surface of the glass cover plate, so that the light reflectivity is reduced, the transmittance is improved, and logo information manufactured by logo patterns has an invisible effect and cannot be directly seen.

Description

Technical Field

[0001] The utility model relates to the field of electronic product accessories, in particular to an invisible logo cover plate. Background Art

[0002] At present, there are more and more intelligent products. With the development of science and technology, intelligent products can be seen everywhere in people's lives. Smart wearable products have been very popular in recent years. Smart watches and bracelets are of various styles. They are not only used as watches and sports equipment, but also have certain accessories.

[0003] The problems of the existing technology mainly include high light reflectivity and low transmittance, which makes it impossible to clearly display the logo information made on the glass cover, affecting the visual effect. In addition, the logo information in the existing technology can often be seen directly, and the invisible effect cannot be achieved, which cannot meet the needs of some special scenes. The surface treatment method of the glass cover in the existing technology is single, which cannot effectively reduce the light reflectivity and increase the transmittance, and it is difficult to achieve the effect of invisible logo. Utility Model Content

[0004] In order to solve the deficiencies of the above-mentioned prior art, the utility model provides an invisible logo cover plate, which reduces the light reflectivity and increases the transmittance by alternately arranging low-refractive-index films and high-refractive-index films with different refractive indices on the surface of the glass cover plate, so that the logo information made by the logo pattern has an invisible effect and cannot be seen directly.

[0005] The technical problem to be solved by the utility model is achieved by the following technical solution: an invisible logo cover plate, comprising a glass cover plate, the glass cover plate comprising a logo area and a non-logo area, and a logo pattern is provided on the surface of the logo area;

[0006] A display layer, disposed on the lower surface of the glass cover plate;

[0007] The logo pattern is formed by alternately stacking low-refractive-index films and high-refractive-index films, and has at least three layers of the low-refractive-index films and three layers of the high-refractive-index films.

[0008] Furthermore, the upper surface of the glass cover plate is provided with a first layer of high refractive index film, a first layer of low refractive index film, a second layer of high refractive index film, a second layer of low refractive index film, a third layer of high refractive index film, and a third layer of low refractive index film in sequence.

[0009] Furthermore, the thickness of the first layer of high refractive index film, the first layer of low refractive index film, the second layer of high refractive index film, the second layer of low refractive index film, the third layer of high refractive index film and the third layer of low refractive index film are all 10-200 nm.

[0010] Furthermore, the thickness of the logo pattern is controlled to be 400-800nm.

[0011] Furthermore, the reflectivity of the logo pattern is in the range of 4.1-4.2, and the transmittance of the logo pattern is 96%.

[0012] Furthermore, the low refractive index film is a silicon oxide film.

[0013] Furthermore, the high refractive index film is a titanium oxide film or a niobium oxide film.

[0014] Furthermore, the glass substrate is a sapphire glass substrate or a polymethyl methacrylate glass substrate.

[0015] Furthermore, the display layer includes a display area and a frame area, and the frame area surrounds the display area.

[0016] Furthermore, the logo pattern is produced by yellow light technology.

[0017] The utility model has the following beneficial effects: an invisible logo cover plate, comprising a glass cover plate, a logo pattern being provided on the surface of the glass cover plate; a display layer being provided on the lower surface of the glass cover plate; the logo pattern being formed by alternatingly stacking low-refractive index films and high-refractive index films, and having at least three layers of the low-refractive index films and three layers of the high-refractive index films. The present application alternately arranges low-refractive-index films and high-refractive-index films with different refractive indices on the surface of a glass cover plate, and manufactures the low-refractive-index films and the high-refractive-index films into the desired logo pattern shape through a yellow light process. Based on the light interference effect between the low-refractive-index films and the high-refractive-index films, when the external medium is air, the logo pattern has the characteristics of low reflectivity and high transmittance, and the visual difference between the logo pattern and the glass cover plate in the non-logo area is low, so the naked eye cannot detect the existence of the logo pattern. When the external medium is water, the reflectivity of the logo pattern increases sharply, and the visual difference between the logo pattern and the glass cover plate in the non-logo area is large, so the naked eye can detect the existence of the logo pattern, thereby achieving an invisible effect of the logo information, which cannot be seen directly, thereby increasing the uniqueness and aesthetics of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the invisible logo cover provided by the utility model;

[0020] Figure 2 A schematic diagram of the logo pattern structure of the invisible logo cover provided by the utility model;

[0021] Figure 3 This is a front view of the invisible logo cover provided by the utility model.

[0022] 1. Glass cover; 2. Logo pattern; 3. Display layer; 21. First layer of high refractive index film; 22. First layer of low refractive index film; 23. Second layer of high refractive index film; 24. Second layer of low refractive index film; 25. Third layer of high refractive index film; 26. Third layer of low refractive index film; 31. Display area; 32. Frame area. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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. Example

[0027] like Figure 1 and Figure 2 As shown, an invisible logo cover plate, characterized in that it includes a glass cover plate 1, wherein the glass cover plate 1 includes a logo area and a non-logo area, and a logo pattern 2 is provided on the surface of the logo area;

[0028] A display layer 3, disposed on the lower surface of the glass cover plate 1;

[0029] The logo pattern 2 is formed by alternately stacking low-refractive-index films and high-refractive-index films, and has at least three layers of the low-refractive-index films and three layers of the high-refractive-index films.

[0030] The present application alternately arranges low-refractive-index films and high-refractive-index films with different refractive indices on the surface of the glass cover plate 1, and manufactures the low-refractive-index films and the high-refractive-index films into the desired Logo pattern 2 shape through a yellow light process. Based on the light interference effect between the low-refractive-index films and the high-refractive-index films, when the external medium is air, the Logo pattern 2 has the characteristics of low reflectivity and high transmittance, and the visual difference between it and the glass cover plate 1 in the non-logo area is low, so the naked eye cannot detect the existence of the Logo pattern 2. When the external medium is water, the reflectivity of the Logo pattern 2 increases sharply, and the visual difference between it and the glass cover plate 1 in the non-logo area is large, so the naked eye can detect the existence of the Logo pattern 2, thereby achieving the invisible effect of the Logo information, which cannot be seen directly, thereby increasing the uniqueness and aesthetics of the product.

[0031] Furthermore, the upper surface of the glass cover plate 1 is provided with a first high refractive index film 21, a first low refractive index film 22, a second high refractive index film 23, a second low refractive index film 24, a third high refractive index film 25 and a third low refractive index film 26 in sequence.

[0032] Furthermore, the thickness of the first high refractive index film 21, the first low refractive index film 22, the second high refractive index film 23, the second low refractive index film 24, the third high refractive index film 25 and the third low refractive index film 26 are all 10-200 nm. By utilizing the distribution of the above layers and the selection of their respective thickness ranges, a better anti-reflection effect can be achieved with a lower manufacturing cost.

[0033] In another preferred implementation manner of this embodiment, the thickness of the logo pattern 2 is controlled to be 400-800 nm.

[0034] In this embodiment, the low refractive index film is a silicon oxide film, and the high refractive index film is a titanium oxide film or a niobium oxide film, so that when the external medium is air, the reflectivity of the logo pattern 2 is in the range of 4.1%-4.2%, and the transmittance of the logo pattern 2 is about 96%. When the external medium is water, the reflectivity of the logo pattern 2 increases sharply to about 40%, and the transmittance is only about 60%. Example

[0035] In this embodiment, the first layer of high refractive index film 21, the first layer of low refractive index film 22, the second layer of high refractive index film 23, the second layer of low refractive index film 24, the third layer of high refractive index film 25 and the third layer of low refractive index film 26 are connected by vacuum evaporation.

[0036] It should be noted that vacuum evaporation is a commonly used thin film deposition technology for depositing various functional thin films on the surface of substrates. During the vacuum evaporation process, a highly vacuum environment needs to be created first to avoid interference of impurities such as oxygen and nitrogen in the air with the coating process. Next, the required materials, here titanium oxide and silicon oxide, are placed on the evaporation source in the vacuum chamber, and the sublimation of the materials is accelerated by heating. After the heated materials are sublimated into gases, they diffuse to the surface of the substrate in the vacuum chamber, cool and deposit into thin films. By controlling the evaporation sequence and deposition conditions of different materials, a multilayer structure of high refractive index film and low refractive index film can be formed. In the preparation of multilayer films, vacuum evaporation provides the ability to form a uniform and dense interface between different material layers, selectively deposit different materials in different layers, accurately control the thickness of each layer of film, and improve the quality and performance of the film. Therefore, vacuum evaporation is a very flexible and widely used thin film deposition technology, which plays a key role in the preparation of multilayer thin film structures.

[0037] In another preferred implementation of this embodiment, the first layer of high refractive index film 21, the first layer of low refractive index film 22, the second layer of high refractive index film 23, the second layer of low refractive index film 24, the third layer of high refractive index film 25 and the third layer of low refractive index film 26 are connected by magnetron sputtering.

[0038] It should be noted that magnetron sputtering is a common thin film deposition technology, which is widely used in the semiconductor industry, optical coatings, thin film solar cells and other fields. In this process, the material, usually a metal or a compound, is loaded on a target in a vacuum chamber. Through heating or electron beam bombardment, the material in the target is released to form vapor or ions. Then, these vapors or ions are deposited on the surface of the target substrate in the chamber to form the desired film. The whole process needs to be carried out in a high vacuum environment. The preparation and surface cleaning of the target are very critical, and the properties of the film can be adjusted by controlling parameters such as the sputtering rate and substrate temperature during the sputtering process. In general, magnetron sputtering is a flexible and controllable thin film deposition technology that is suitable for the preparation of a variety of materials and complex thin film structures. Example

[0039] The glass cover plate 1 described in the present application is sapphire glass or polymethyl methacrylate glass.

[0040] Sapphire glass is a synthetic sapphire material with the characteristics of high hardness, wear resistance and high temperature resistance. Polymethyl methacrylate glass is a transparent plastic material with good impact resistance and chemical corrosion resistance. Both materials have excellent transparency and durability and are suitable for manufacturing the glass cover 1.

[0041] Furthermore, if Figure 3 As shown, the display layer 3 includes a display area 31 and a frame area 32 , and the frame area 32 surrounds the display area 31 .

[0042] In this embodiment, the logo pattern 2 is located in the corresponding display area 31. Under normal circumstances, the produced pattern, logo or other information cannot be directly seen because the reflectivity is only about 4.2% and the transmittance is about 96%. However, when there is water on the surface of the glass cover plate 1 or it is placed in water, the reflectivity of the film layer will change, and then the pattern, logo or other information on the film layer will change sharply due to the change of the external environment of the film interference, and the reflectivity will increase to about 40%, and the human eye can see the produced pattern, logo or other information.

[0043] In another preferred implementation manner of this embodiment, the logo pattern 2 is made into the required logo shape by using yellow light technology.

[0044] It should be noted that the yellow light process is a commonly used printing process, also known as screen printing. It is a process for making a printing plate using a photosensitive material, by making a design pattern on a photosensitive material, and then transferring the pattern to the printing plate through the process of exposure and development, and then printing the pattern on the desired object through a printing press. The yellow light process can achieve high-precision pattern printing and is suitable for printing on various materials, including glass, metal, plastic, etc. It can achieve printing in multiple colors, and the colors are bright and lasting, and not easy to fade. At the same time, the pattern printed by the yellow light process has good wear resistance and weather resistance, and is suitable for various indoor and outdoor environments. In this embodiment, the yellow light process is used to make the logo and logo pattern, which can ensure that the pattern is clear, colorful and long-lasting, and can be perfectly combined with the logo pattern to enhance the appearance texture and quality of the product.

[0045] 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. An invisible logo cover, characterized in that: Comprising: a glass cover plate (1), the glass cover plate (1) comprising a logo area and a non-logo area, a logo pattern (2) being provided on a surface of the logo area; A display layer (3) is provided on the lower surface of the glass cover plate (1); The logo pattern (2) is formed by alternately stacking low-refractive index films and high-refractive index films, and has at least three layers of the low-refractive index films and three layers of the high-refractive index films.

2. The invisible logo cover according to claim 1, characterized in that: The upper surface of the glass cover plate (1) is provided with a first layer of high refractive index film (21), a first layer of low refractive index film (22), a second layer of high refractive index film (23), a second layer of low refractive index film (24), a third layer of high refractive index film (25) and a third layer of low refractive index film (26) in sequence.

3. The invisible logo cover according to claim 2, characterized in that: The thickness of the first layer of high refractive index film (21), the first layer of low refractive index film (22), the second layer of high refractive index film (23), the second layer of low refractive index film (24), the third layer of high refractive index film (25) and the third layer of low refractive index film (26) are all 10-200 nm.

4. The invisible logo cover according to claim 1, characterized in that: The thickness of the logo pattern (2) is controlled to be 400-800 nm.

5. The invisible logo cover according to claim 1, characterized in that: The reflectivity of the logo pattern (2) is in the range of 4.1-4.2, and the transmittance of the logo pattern (2) is 96%.

6. The invisible logo cover according to claim 1, characterized in that: The low refractive index film is a silicon oxide film.

7. The invisible logo cover according to claim 1, characterized in that: The high refractive index film is a titanium oxide film or a niobium oxide film.

8. The invisible logo cover according to claim 1, characterized in that: The glass cover plate (1) is sapphire glass or polymethyl methacrylate glass.

9. The invisible logo cover according to claim 1, characterized in that: The display layer (3) comprises a display area (31) and a frame area (32), wherein the frame area (32) surrounds the display area (31).

10. The invisible logo cover according to claim 1, characterized in that: The logo pattern (2) is produced by using yellow light technology.

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