Colorful mobile phone rear cover

Abstract

The utility model relates to the technical field of mobile phone accessories, in particular to a colorful mobile phone rear cover. The colorful mobile phone rear cover comprises a first reflecting layer, a light guide layer, a texture layer, a color matching layer and a protective layer, an incident plane and a first reflecting layer are arranged on the inner side surface of the light guide layer, and a light source enters from the incident plane; a second reflecting layer and an emitting surface are arranged on the outer side surface of the light guide layer; the texture layer is arranged on the ejection surface; the toning layer is arranged on the second reflecting layer; the color mixing layer comprises a TiO2 layer and a SiO2 layer which are arranged alternately; the first layer and the outermost layer are TiO2 layers; and the protective layer is arranged on the color mixing layer. The light guide layer has a light guide effect, the first reflecting layer and the second reflecting layer are plated on the light guide layer, a light source enters the light guide layer from an incident surface, and light can only reach the texture layer from an emergent surface; when light passes through the texture layer, a cool visual effect can be generated at night. And meanwhile, the color mixing layer is provided with a plurality of TiO2 layers and SiO2 layers which are arranged at intervals, so that the orange-yellow gradient color effect can be generated under the illumination condition.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile phone accessories, in particular to a colorful mobile phone back cover. Background Art

[0002] A mobile phone's back cover occupies a significant portion of the phone's exterior surface, so its aesthetics directly influence consumer purchasing decisions. Some mobile phone back covers on the market feature a gradient color effect, achieved through coatings of varying thicknesses. This gradient effect creates a different gradient effect when viewed from different angles. However, this gradient effect only occurs in bright light; in the dark (e.g., at night), the textured effect is lost.

[0003] For example, Chinese patent application number CN202120232993.0 discloses a mobile phone case coating with an orange-yellow gradient color. The coating features a UV film applied to a sheet of mobile phone case material, a base layer formed of a silicon-aluminum mixture, and a first, second, and third color-adjusting layer formed from the base layer. The first color-adjusting layer comprises a first TiO2 film and a first SiO2 film stacked together; the second color-adjusting layer comprises a second TiO2 film and a second SiO2 film; and the third color-adjusting layer is a TiO2 coating. This type of mobile phone case only produces a cool gradient effect in the presence of light; in the dark, it produces a textured visual effect that lacks the cool appeal. Utility Model Content

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a colorful mobile phone back cover, which not only has a gradient color effect, but also has a cool texture visual effect, thereby overcoming the shortcomings of the prior art.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The present application provides a colorful mobile phone back cover, comprising a first reflective layer, a light-guiding layer, a texture layer, a color-adjusting layer, and a protective layer; the inner side surface of the light-guiding layer is provided with an incident surface and a first reflective layer, and the light source is incident from the incident surface; the outer side surface of the light-guiding layer is provided with a second reflective layer and an exit surface; the texture layer is provided on the exit surface; the color-adjusting layer is provided on the second reflective layer; the color-adjusting layer comprises a TiO2 layer and a SiO2 layer arranged alternately; and the protective layer is provided on the color-adjusting layer.

[0007] Preferably, the first reflective layer and the second reflective layer are one of aluminum film, silver film and ZrO2 film.

[0008] Preferably, the light guide layer is made of acrylic or polycarbonate.

[0009] Preferably, the thickness of the light guide layer is between 2-3 mm.

[0010] Preferably, the texture layer is a layered structure formed by acrylic resin ink or epoxy resin ink.

[0011] Preferably, the protective layer is a layered structure made of one of SiO2, acrylic resin, and epoxy resin.

[0012] Preferably, the heat-conductive particles are arranged inside the protective layer, and the heat-conductive particles are distributed in the protective layer in one or more shapes including layers, clusters, scattered points, strips, and a network.

[0013] Preferably, the light guide layer is a curved structure, and button holes are provided on the inner side of its edge.

[0014] This invention offers significant advantages and benefits over existing technologies. Specifically, as can be seen from the aforementioned technical solution, the light-guiding layer functions as a light guide. The first and second reflective layers are plated on the light-guiding layer. Light enters the light-guiding layer from the incident surface, while light can only reach the textured layer from the exit surface. This passage of light through the textured layers creates a dazzling visual effect at night. Furthermore, the color-tuning layer comprises multiple alternating TiO2 and SiO2 layers, resulting in an orange-yellow gradient effect under illumination. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the layered structure of an embodiment of the present utility model.

[0016] Figure 2 It is a schematic cross-sectional structure diagram of the light-transmitting layer of an embodiment of the present utility model.

[0017] Figure 3 It is a schematic back view of an embodiment of the present invention.

[0018] Description of the accompanying drawings:

[0019] 10. Light-guiding layer; 11. First reflecting layer; 12. Incident surface; 13. Second reflecting layer; 14. Emission surface; 15. Texture layer; 16. Protective layer; 17. Buttonhole; 18. Light source; 20. Color-adjusting layer; 21. First TiO2 film; 22. First SiO2 film; 23. Second TiO2 film; 24. Second SiO2 film; 25. Third TiO2 film. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0021] Please refer to Figures 1 to 3 As shown, it shows the specific structure of the preferred embodiment of the present utility model, which is a colorful mobile phone back cover.

[0022] The first and second reflective layers 11 and 13 sandwich the light-guiding layer 10. Light enters through the incident surface 12 and is then emitted from the exit surface 14 to the textured layer 15, creating a cool effect even at night. The alternating layers of TiO2 and SiO2 create a gradient orange-yellow color effect when illuminated.

[0023] This application provides a colorful mobile phone back cover, comprising a first reflective layer 11, a light-guiding layer 10, a texture layer 15, a color-adjusting layer 20, and a protective layer 16. The inner side of the light-guiding layer 10 is provided with an incident surface 12 and the first reflective layer 11, through which light enters. The outer side of the light-guiding layer 10 is provided with a second reflective layer 13 and an exit surface 14. The texture layer 15 is provided on the exit surface 14. The color-adjusting layer 20 is provided on the second reflective layer 13. The color-adjusting layer 20 comprises alternating TiO2 and SiO2 layers. The protective layer 16 is provided on the color-adjusting layer 20. The light-guiding layer 10 has a certain thickness, providing excellent light-guiding performance. The mobile phone back cover has a certain curvature, which facilitates light transmission within the light-guiding layer 10. The thickness of the light-guiding layer 10 is between 2 and 3 mm, although the thickness of the light-guiding layer 10 can also be 1 mm, 1.5 mm, 2 mm, 3 mm, and so on. The texture layer 15 has a color, a texture pattern, and light transmittance. The light source is a laser light source or a spotlight. The lamp beads of the light source are very small and can emit light into the light-guiding layer 10. After the light source enters from the incident surface 12, the second reflective layer 13 and the first reflective layer 11 lock the light, and the light can only be emitted from the emission surface 14 to the texture layer 15. The texture layer 15 has color, texture, and pattern. When light hits the texture layer 15, the texture layer 15 produces a very gorgeous effect at night. The color adjustment layer 20 includes TiO2 layers and SiO2 layers arranged alternately. The TiO2 layers and SiO2 layers of different thicknesses make light irradiated on the back cover of the mobile phone produce an orange-yellow gradient color effect. The color adjustment layer 20 includes, from the inside to the outside, a first TiO2 film 21, a first SiO2 film 22, a second TiO2 film 23, a second SiO2 film 24, and a third TiO2 film 25. A first TiO2 film 21 is deposited on the second reflective layer 13; the first SiO2 film 22 is deposited on the surface of the first TiO2 film 21, with a thickness of 7.5-7.8 nm, and the first SiO2 film 22 is deposited between 8.2-8.9 nm. The second TiO2 film 23 is deposited on the surface of the first SiO2 film 22, and the second SiO2 film 24 is deposited on the surface of the second TiO2 film 23, with a thickness of 7.2-8.8 nm, and the second SiO2 film 24 is deposited between 9.2-9.8 nm. The third TiO2 film 25 is deposited on the surface of the second SiO2 film 24, with a thickness of 7.2-7.8 nm. The SiO2, aluminum film, silver film, ZrO2, and TiO2 layers of this embodiment are deposited using PVD (ion plating) and evaporation techniques. Of course, the texture layer 15 can also be provided on the second reflective layer 13 , and the light enters the texture layer from the emitting surface 14 .

[0024] Preferably, the first reflective layer 11 and the second reflective layer 13 are one of aluminum film, silver film, and ZrO2 film. In this embodiment, the first reflective layer 11 and the second reflective layer 13 are aluminum film, which has a simple and mature coating process, is more conducive to improving production efficiency, and has low raw material costs.

[0025] Preferably, the light guide layer 10 is made of either acrylic or polycarbonate. In this embodiment, the light guide layer 10 is made of acrylic. The acrylic sheet is pre-pressed into the basic shape of the phone back cover using a mold, then placed into a CNC machine for fine processing into the phone back cover, followed by coating.

[0026] Preferably, the texture layer 15 is a layered structure formed by acrylic resin ink or epoxy resin ink. The texture layer 15 has a texture and pattern and can be applied to the emitting surface 14 by coating / spraying. The texture layer 15 can be quickly cured by UV lamp (ultraviolet light), which is beneficial to improving production efficiency.

[0027] Preferably, the protective layer 16 is a layered structure made of a material selected from the group consisting of SiO2, acrylic resin, and epoxy resin. When the protective layer 16 is SiO2, it can be applied to the color-adjusting layer 20 by coating. When the protective layer 16 is made of acrylic resin or epoxy resin, it can be applied to the color-adjusting layer 20 by spraying.

[0028] Preferably, the protective layer 16 is provided with the thermally conductive particles, which are distributed within the protective layer 16 in one or more of the following shapes: layers, clusters, scattered dots, strips, or a network. The thermally conductive particles in this embodiment include any two or more of aluminum oxide, silica fume, boron nitride, aluminum nitride, talc, and titanium dioxide. When the protective layer 16 is made of SiO2, no thermally conductive particles are provided. When the protective layer 16 is made of acrylic resin or epoxy resin, thermally conductive particles are provided. The thermally conductive particles are incorporated into the protective layer 16 and then cured.

[0029] Preferably, the light guide layer 10 is a curved structure with a button hole 17 provided on the inner side of its edge. The curvature of the light guide layer 10 is small, allowing light to pass through smoothly. The button hole is buckled onto the mobile phone mid-plate, allowing the mobile phone back cover to be fixed to the mobile phone mid-plate.

[0030] Method for making a colorful mobile phone back cover: 1. Place the light-guiding material into a mold and heat it, which then presses the light-guiding layer 10 into shape. 2. Plate the light-guiding layer 10 with a first reflective layer 11 and a second reflective layer 13. 3. Place the semi-finished product into a CNC machine, which removes portions of the first and second reflective layers 11, 13, forming the incident and exit surfaces 14. 4. Spray-coat the texture layer 15 onto the exit surface 14. 5. Apply the color-tuning layer 20. 6. Plate or spray-coat the protective layer 16.

[0031] In summary, the key design features of this invention lie in the fact that the first and second reflective layers 11, 13 are plated on the light-guiding layer 10. Light enters the light-guiding layer 10 from the incident surface 12, and light can only reach the textured layer 15 from the exit surface 14. Light passing through the textured layer 15 creates a striking visual effect even at night. Furthermore, the color-tuning layer 20, comprising alternating layers of TiO2 and SiO2, produces an orange-yellow gradient effect under illumination.

[0032] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A colorful mobile phone back cover, characterized by: It includes a first reflective layer, a light-guiding layer, a texture layer, a color-adjusting layer, and a protective layer; the inner side of the light-guiding layer is provided with an incident surface and a first reflective layer, and the light source is incident from the incident surface; the outer side of the light-guiding layer is provided with a second reflective layer and an exit surface; the texture layer is provided on the exit surface; the color-adjusting layer is provided on the second reflective layer; the color-adjusting layer includes TiO2 layers and SiO2 layers arranged alternately; the protective layer is provided on the color-adjusting layer; the light source is a laser light source or a spotlight.

2. The colorful mobile phone back cover according to claim 1, characterized in that: The first reflective layer and the second reflective layer are one of aluminum film, silver film and ZrO2 film.

3. The colorful mobile phone back cover according to claim 1, characterized in that: The light guide layer is one of acrylic or polycarbonate sheets.

4. A colorful mobile phone back cover according to claim 1 or 3, characterized in that: The thickness of the light guide layer is between 2-3 mm.

5. The colorful mobile phone back cover according to claim 1, characterized in that: The texture layer is a layered structure formed by acrylic resin ink or epoxy resin ink.

6. The colorful mobile phone back cover according to claim 1, characterized in that: The protective layer is a layered structure made of one of SiO2, acrylic resin, and epoxy resin.

7. The colorful mobile phone back cover according to claim 1 or 6, characterized in that: Heat-conducting particles are arranged inside the protective layer, and the heat-conducting particles are distributed in the protective layer in one or more shapes including layered, clustered, scattered, striped, and meshed.

8. The colorful mobile phone back cover according to claim 1, characterized in that: The light guide layer is a curved structure, and button holes are provided on the inner side of the edge of the light guide layer.

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