Thermochromic coated cover plate

Abstract

The utility model discloses a thermochromic film-coated cover plate, which comprises a glass substrate, a thermochromic ink layer, wherein the thermochromic ink layer is arranged on one side of the glass substrate; the black silicon carbide coating layer is arranged on one side, far away from the glass substrate, of the thermochromic ink layer. The heat discoloration film-coated cover plate can reduce the risk of falling off from a product shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electronic fittings especially relates to a temperature sensing discoloration coating cover plate. BACKGROUND

[0002] Mobile phones, tablet computers, cameras, notebook computers and other electronic products generally include a cover plate for protecting the electronic product body or enhancing the appearance of the electronic product. The appearance color effect and performance effect of the cover plate on the market are relatively single, the color effect is irreversible, and only a single color can be formed and cannot be changed.

[0003] In order to solve the above technical problems, the Chinese patent with application number CN201820943277.1 discloses a temperature sensing discoloration cover plate, which includes a transparent substrate, a temperature sensing ink layer disposed on the transparent substrate, a colored ink bottom layer disposed on the side of the temperature sensing ink layer away from the transparent substrate, and a reverse cover ink layer disposed on the side of the colored ink bottom layer away from the temperature sensing ink layer. The temperature sensing ink layer is transparent at room temperature, at which time the cover plate displays the color of the colored ink bottom layer; the temperature sensing ink layer displays different colors according to the temperature rise of the electronic product using the cover plate, increasing the diversity of the appearance of the cover plate.

[0004] However, the ink is relatively soft, and during a series of transportation, transfer and testing processes before the cover plate is attached to the product shell, the temperature sensing ink layer, the colored ink bottom layer and the reverse cover ink layer will inevitably be touched by external objects and will be scratched by external objects, resulting in scratches and the like, which will cause the surface of the ink layer to be uneven, thereby reducing the adhesion between the ink layer and the glue, and increasing the risk of the cover plate falling off the product shell during long-term use. UTILITY MODEL CONTENT

[0005] To solve the above problems of the prior art, the utility model provides a temperature sensing discoloration coating cover plate, which can reduce the risk of falling off the product shell.

[0006] The technical problem to be solved by the utility model is solved by the following technical solutions:

[0007] A temperature sensing discoloration coating cover plate, comprising:

[0008] A glass substrate;

[0009] A temperature sensing discoloration ink layer disposed on one side of the glass substrate;

[0010] A black silicon carbide coating layer disposed on the side of the temperature sensing discoloration ink layer away from the glass substrate.

[0011] Further, the thickness of the black silicon carbide coating layer is 10-20nm.

[0012] Further, the black silicon carbide coating layer is a silicon carbide coating layer containing carbon, aluminum, boron and other impurities, and the mass percentage of the impurities is less than 5%.

[0013] Further, the black silicon carbide coating layer is formed on the thermochromic ink layer by vacuum evaporation, magnetron sputtering or chemical vapor deposition.

[0014] Further, the thermochromic ink layer is transparent at room temperature, and becomes colored at a temperature higher or lower than room temperature.

[0015] Further, the thermochromic ink layer is a bisphenol A crystal violet lactone ink layer, and the thickness is 7-10μm.

[0016] Further, the glass substrate includes a display area and a frame area, and the frame area surrounds the display area; the thermochromic ink layer and the black silicon carbide coating layer only cover the frame area of the glass substrate, and avoid the display area of the glass substrate.

[0017] Further, the thermochromic coating cover plate further comprises:

[0018] A tin coating layer is arranged on the side of the glass substrate away from the thermochromic ink layer;

[0019] A cadmium selenide coating layer is arranged on the side of the tin coating layer away from the glass substrate;

[0020] A titanium nitride coating layer is arranged on the side of the cadmium selenide coating layer away from the tin coating layer.

[0021] Further, the thickness of the tin coating layer is 10-15nm, the thickness of the cadmium selenide coating layer is 8-18nm, and the thickness of the titanium nitride coating layer is 10-20nm.

[0022] Further, the glass substrate is tempered glass, and the thickness is 0.4-0.7mm.

[0023] The utility model has the following beneficial effects: the temperature sensing discoloration film-coated cover plate of the utility model sets up the black silicon carbide film-coated layer on the side of the temperature sensing discoloration ink layer away from the glass substrate, the high hardness of the black silicon carbide film-coated layer protects the surface of the temperature sensing discoloration ink layer, prevents the temperature sensing discoloration ink layer from being scratched by foreign matter in a series of transportation, transfer and testing processes before the cover plate is attached to the product shell, ensures the smooth surface and no scratches, thereby improving the adhesion between the cover plate and the glue and reducing the risk of the cover plate falling off the product shell. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The utility model provides a temperature sensing discoloration film-coated cover plate's stacking structure schematic view.

[0025] Figure 2 The utility model provides a temperature sensing discoloration film-coated cover plate's plane structure schematic view.

[0026] Figure 3 The utility model provides another temperature sensing discoloration film-coated cover plate's stacking structure schematic view. DETAILED DESCRIPTION

[0027] The utility model will be explained in detail below by combining with the drawings and examples, the example of the example is shown in the drawings, wherein the same or similar label indicates the same or similar element or element with the same or similar function throughout. The example described below by referring to the drawings is exemplary, and is intended to explain the utility model, and can not be understood as the limitation of the utility model.

[0028] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore can not be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, and therefore can not be understood as the limitation of the utility model.

[0029] In addition, the terms "first", "second", "third" are only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second", "third" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," and "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Example 1

[0032] like Figure 1 As shown, a thermochromic coating cover plate includes:

[0033] Glass substrate 1;

[0034] Thermochromic ink layer 2 is disposed on one side of the glass substrate 1;

[0035] A black silicon carbide coating layer 3 is disposed on the side of the thermochromic ink layer 2 away from the glass substrate 1.

[0036] The thermochromic coated cover of this invention has a black silicon carbide coating layer 3 disposed on the side of the thermochromic ink layer 2 away from the glass substrate 1. The high hardness of the black silicon carbide coating layer 3 protects the surface of the thermochromic ink layer 2, preventing scratches on the thermochromic ink layer 2 during a series of transportation, transfer, and testing processes before the coated cover is bonded to the product shell. This ensures a smooth, scratch-free surface, thereby improving adhesion to adhesives and reducing the risk of the coated cover detaching from the product shell. At the same time, the black silicon carbide coating layer 3 also provides a black base color for the coated cover, saving on additional base color ink.

[0037] Silicon carbide has a Mohs hardness of up to 9.5. Pure silicon carbide is transparent. When silicon carbide contains impurities such as carbon, aluminum, and boron, it will appear black. Moreover, when the mass percentage of impurities such as carbon, aluminum, and boron is less than 5%, the hardness of silicon carbide is almost unaffected by the impurities.

[0038] Therefore, preferably, the black silicon carbide coating layer 3 is a silicon carbide coating layer containing impurities such as carbon, aluminum, and boron, with the mass percentage of impurities being less than 5%, and the black silicon carbide coating layer 3 is formed on the thermochromic ink layer 2 by vacuum evaporation, magnetron sputtering, or chemical vapor deposition.

[0039] During the coating process, pure silicon carbide target material is converted into silicon carbide gas using methods such as vacuum evaporation, magnetron sputtering, or chemical vapor deposition. This silicon carbide gas is then introduced into the coating chamber. Simultaneously, impurity target materials such as carbon, aluminum, and boron are converted into impurity gases using the same methods, and these impurity gases are also introduced into the coating chamber. The silicon carbide gas and impurity gases are then uniformly mixed in the coating chamber and coated onto the thermochromic ink layer 2 to ultimately form the black silicon carbide coating layer 3. The mass percentage of impurities is controlled by adjusting the concentration of the impurity gas introduced into the coating chamber.

[0040] In this embodiment, the thickness of the black silicon carbide coating layer 3 is 10-20 nm.

[0041] The thermochromic ink layer 2 is transparent at room temperature, so that the coated cover plate presents a black background color consistent with the black silicon carbide coating layer 3; the thermochromic ink layer 2 becomes colored at temperatures above or below room temperature, so that the coated cover plate presents a mixed color of the black silicon carbide coating layer 3 and the thermochromic ink layer 2, or an appearance color consistent with the color change of the thermochromic ink layer 2.

[0042] In addition to enhancing the personalization of the appearance, the thermochromic ink layer 2 will also change color as the temperature of the electronic product rises during the use of mobile phones and other electronic products, thereby alerting the user to the heat status of the electronic product, so that the user can cool down the electronic product in time and avoid damage to the electronic product.

[0043] Preferably, the thermochromic ink layer 2 is a bisphenol A crystal violet lactone ink layer with a thickness of 7-10 μm.

[0044] The thermochromic ink layer 2 uses crystal violet lactone as a leuco dye and bisphenol A as a color developer. During preparation, the leuco dye and color developer are first uniformly mixed in a preset ratio, then dissolved in an organic solvent to form the thermochromic ink. Finally, the thermochromic ink is applied to the glass substrate 1 using methods such as screen printing to form a specific ink pattern.

[0045] In this embodiment, as Figure 2 As shown, the glass substrate 1 includes a display area 11 and a border area 12, with the border area 12 surrounding the display area 11; the thermochromic ink layer 2 and the black silicon carbide coating layer 3 only cover the border area 12 of the glass substrate 1, while avoiding the display area 11 of the glass substrate 1.

[0046] Preferably, the glass substrate 1 is tempered glass with a thickness of 0.4-0.7 mm.

[0047] Example 2

[0048] As an optimization of Embodiment 1, in this embodiment, such as Figure 3 As shown, the thermochromic coating cover plate further includes:

[0049] A tin plating layer 4 is disposed on the side of the glass substrate 1 away from the thermochromic ink layer 2;

[0050] A cadmium selenide coating layer 5 is disposed on the side of the tin coating layer 4 away from the glass substrate 1.

[0051] A titanium nitride coating layer 6 is disposed on the side of the cadmium selenide coating layer 5 away from the tin coating layer 4.

[0052] The thermochromic coated cover of this invention comprises a tin coating layer 4, a cadmium selenide coating layer 5, and a titanium nitride coating layer 6 sequentially disposed on the side of the glass substrate 1 away from the thermochromic ink layer 2. The tin coating layer 4, being soft, having large molecular gaps, and easily combining with other coating layers, serves as an adhesion layer in the multilayer structure, improving the adhesion of the cadmium selenide coating layer 5 to the glass substrate 1. Furthermore, the cadmium selenide coating layer 5, with its strong absorption capacity for near-infrared light, enhances the near-infrared protection performance of the coated cover. Finally, the titanium nitride coating layer 6, with its strong chemical inertness, provides the coated cover with oxidation and corrosion resistance.

[0053] In this embodiment, the thickness of the tin plating layer 4 is 10-15 nm, the thickness of the cadmium selenide plating layer 5 is 8-18 nm, and the thickness of the titanium nitride plating layer 6 is 10-20 nm.

[0054] The tin plating layer 4, cadmium selenide plating layer 5, and titanium nitride plating layer 6 simultaneously cover the display area 11 and the border area 12 of the glass substrate 1.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present utility model, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the present utility model.

Claims

1. A thermochromic coating cover plate, characterized in that, include: Glass substrate; A thermochromic ink layer is disposed on one side of the glass substrate; A black silicon carbide coating layer is disposed on the side of the thermochromic ink layer away from the glass substrate.

2. The thermochromic coating cover plate according to claim 1, characterized in that, The thickness of the black silicon carbide coating layer is 10-20 nm.

3. The thermochromic coating cover plate according to claim 1, characterized in that, The black silicon carbide coating layer is a silicon carbide coating layer containing carbon, aluminum, and boron impurities, and the mass percentage of the impurities is less than 5%.

4. The thermochromic coating cover plate according to claim 1, characterized in that, The black silicon carbide coating layer is formed on the thermochromic ink layer by vacuum evaporation, magnetron sputtering or chemical vapor deposition.

5. The thermochromic coating cover plate according to claim 1, characterized in that, The thermochromic ink layer is transparent at room temperature and turns colored at temperatures above or below room temperature.

6. The thermochromic coating cover plate according to claim 1, characterized in that, The thermochromic ink layer is a bisphenol A crystal violet lactone ink layer with a thickness of 7-10 μm.

7. The thermochromic coating cover plate according to claim 1, characterized in that, The glass substrate includes a display area and a border area, with the border area surrounding the display area; the thermochromic ink layer and the black silicon carbide coating layer only cover the border area of ​​the glass substrate, while avoiding the display area of ​​the glass substrate.

8. The thermochromic coating cover plate according to claim 1, characterized in that, The thermochromic coating cover plate also includes: A tin plating layer is disposed on the side of the glass substrate away from the thermochromic ink layer; A cadmium selenide coating layer is disposed on the side of the tin coating layer away from the glass substrate; A titanium nitride coating layer is disposed on the side of the cadmium selenide coating layer away from the tin coating layer.

9. The thermochromic coating cover plate according to claim 8, characterized in that, The thickness of the tin coating layer is 10-15 nm, the thickness of the cadmium selenide coating layer is 8-18 nm, and the thickness of the titanium nitride coating layer is 10-20 nm.

10. The thermochromic coating cover plate according to claim 1, characterized in that, The glass substrate is tempered glass with a thickness of 0.4-0.7 mm.

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