Shell based on structural color coating

Abstract

The utility model discloses a shell based on a structural color coating, which comprises a light-transmitting plastic base material, the structural color coating and a texture layer are sequentially laminated on the upper surface of the light-transmitting plastic base material, and an ink layer is arranged on the lower surface of the light-transmitting plastic base material or the texture layer; the structural color coating is evenly provided with three-dimensional photonic crystals used for reflecting visible light, and the thickness of the structural color coating is 5-30 microns. Under a fixed angle, the three-dimensional photonic crystal can reflect incident light with a specific wavelength in visible light, so that the color generation purity of the shell is high. The wavelength ranges of reflected light of the three-dimensional photonic crystal at different angles are different, so that the multicolor gradual change effect can be achieved when the shell is observed at different angles. And meanwhile, the reflected light of the three-dimensional photonic crystal is interfered with the reflected light of the texture layer, so that the reflected light effect of the shell is complex and diversified, and the surface texture of the shell also has a colorful light effect.

Description

Technical Field

[0001] The utility model relates to the technical field of housings of electronic equipment, in particular to a housing based on a structural color coating. Background Art

[0002] As mobile phones are constantly updated, mobile phone accessories are also constantly innovating. As the largest accessory, mobile phone cases not only protect the internal hardware of the mobile phone, but also have to be beautiful. Currently, mainstream mobile phone cases use industrial plastics as the base material, and are processed through a variety of processes to achieve a rich appearance effect, making the mobile phone case have a composite effect of dazzling colors and textures, making the mobile phone case more popular.

[0003] For example, a Chinese patent with the announcement number CN110815983A discloses a shell of an electronic device, including a light-transmitting shell, a first coating layer, a membrane, a texture layer and a second coating layer stacked in sequence. The first coating layer and the second coating layer are both composed of a plurality of first sub-film layers and a plurality of second sub-film layers arranged alternately, and the first sub-film layer is formed of titanium dioxide, and the second sub-film layer is formed of silicon dioxide. The shell allows light to be refracted multiple times between the film layers with different refractive indices between the first sub-film layer and the second sub-film layer, thereby achieving a rainbow-like color-changing effect on the surface of the shell, but the above-mentioned shell structure is relatively complicated. In view of this, the utility model proposes a shell based on a structural color coating to solve the above-mentioned problem. Utility Model Content

[0004] The utility model overcomes the shortcomings of the above-mentioned technology and provides a shell based on structural color coating. In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A shell based on a structural color coating comprises a light-transmitting plastic substrate, the upper surface of which is sequentially stacked with a structural color coating and a texture layer, and an ink layer is arranged on the lower surface of the light-transmitting plastic substrate or the texture layer; the structural color coating is uniformly provided with three-dimensional photonic crystals for reflecting visible light.

[0006] Preferably, the thickness of the structural color coating is 5 to 30 um.

[0007] Preferably, the light transmittance of the light-transmitting plastic substrate coated with the structural color coating is 80-90%.

[0008] Preferably, the three-dimensional photonic crystal is formed by orderly arrangement of nano-microspheres with a particle size of 100 to 400 nm.

[0009] Preferably, the three-dimensional photonic crystal is used to reflect light having a wavelength of λ 1 ~λ 2 Visible light, λ 2 With λ1 The difference between them is 50-100 nm, and the structural color coating has a wavelength of λ 1 ~λ 2 The reflectivity of visible light is 10-80%.

[0010] Preferably, the texture layer includes UV texture glue and a surface texture transferred onto the UV texture glue.

[0011] Preferably, the texture layer has a thickness of 5 to 20 μm.

[0012] Preferably, the surface texture is at least one of carbon fiber texture, diamond pattern, Kevlar texture, brushed pattern, water ripple, sun pattern, batch pattern, woven pattern, sandblasted pattern, leather texture, fantasy texture, bulge texture, cat's eye texture, matte surface, glossy surface, high-gloss surface, magnetic texture, folding screen texture, and luminous texture.

[0013] Preferably, the light-transmitting plastic substrate is one of a PC board, a PC / PMMA composite board, a PET board, and a glass fiber reinforced composite board.

[0014] Preferably, the thickness of the light-transmitting plastic substrate is 450-700 μm.

[0015] Preferably, the texture layer is connected to the ink layer through PVD coating.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. At a fixed angle, the three-dimensional photonic crystal can reflect incident light of a specific wavelength in visible light, making the shell color pure. Moreover, the wavelength range of the reflected light of the three-dimensional photonic crystal is different at different angles, resulting in a colorful gradient effect when observing the shell at different angles. At the same time, the reflected light of the three-dimensional photonic crystal interferes with the reflected light of the texture layer, making the reflected light effect of the shell complex and diverse, and the surface texture of the shell also has a colorful light effect.

[0018] 2. Compared with the colorful textured shell in the prior art, the utility model includes a light-transmitting plastic substrate, a structural color coating, a texture layer, and an ink layer. It has a simple structure and can be applied to protective shells of various electronic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a cross-sectional structural diagram of the first embodiment and the second embodiment;

[0020] Figure 2 is a spectrum diagram of a light-transmitting plastic substrate coated with a structural color coating in the first embodiment;

[0021] Figure 3is a spectrum diagram of a light-transmitting plastic substrate coated with a structural color coating according to the second embodiment;

[0022] Figure 4 is a cross-sectional structural diagram of a third embodiment and a fourth embodiment;

[0023] Figure 5 is a spectrum diagram of a light-transmitting plastic substrate coated with a structural color coating according to the third embodiment;

[0024] Figure 6 is a spectrum diagram of a light-transmitting plastic substrate coated with a structural color coating according to the fourth embodiment;

[0025] The implementation, functional features and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0027] Reference Figures 1-2 , a first embodiment of a shell based on a structural color coating of the utility model is proposed:

[0028] A shell based on structural color coating includes a light-transmitting plastic substrate 1 with a thickness of 500 μm, which is a PC board. The upper surface of the light-transmitting plastic substrate 1 is coated with a structural color coating 2 with a thickness of 15 μm through micro-concaves, and the structural color coating 2 is evenly provided with three-dimensional photonic crystals for reflecting visible light.

[0029] The upper surface of the structural color coating 2 is coated with UV texture glue, and the surface texture is transferred to the UV texture glue, and completely cured under a mercury lamp, so that a texture layer 3 with a thickness of 5 to 30 μm is formed on the upper surface of the structural color coating 2. Specifically, the surface texture is a diamond pattern.

[0030] A gray-white ink layer 4 is screen-printed on the lower surface of the light-transmitting plastic substrate 1, and then baked and thermally cured to obtain a finished shell.

[0031] like Figure 2 As shown, at an angle perpendicular to the light-transmitting plastic substrate 1, the light-transmitting plastic substrate 1 coated with the structural color coating 2 has an obvious reflection peak, the wavelength range of the reflection peak is 600-675nm, the peak value of the reflection peak is 644nm, the peak reflectivity is 19.3%, and the transmittance is 88.5%. The wavelength range of the reflection peak of the structural color coating 2 will change with the observation angle, so that the shell will have a magical color gradient effect when observed at different angles.

[0032] Reference Figure 1 and Figure 3, a second embodiment of a shell based on a structural color coating of the utility model is proposed:

[0033] A shell based on structural color coating includes a light-transmitting plastic substrate 1 with a thickness of 550 μm, which is a PC / PMMA composite board. The upper surface of the light-transmitting plastic substrate 1 is coated with a structural color coating 2 with a thickness of 15 μm through micro-concaves, and the structural color coating 2 is evenly provided with three-dimensional photonic crystals for reflecting visible light.

[0034] The upper surface of the structural color coating 2 is coated with UV texture glue, and the surface texture is transferred to the UV texture glue, and completely cured under a mercury lamp, so that a texture layer 3 with a thickness of 5 to 30 μm is formed on the upper surface of the structural color coating 2. Specifically, the surface texture is a brushed texture.

[0035] A gray-white ink layer 4 is screen-printed on the lower surface of the light-transmitting plastic substrate 1, and then baked and thermally cured to obtain a finished shell.

[0036] like Figure 3 As shown, at an angle perpendicular to the light-transmitting plastic substrate 1, the light-transmitting plastic substrate 1 coated with the structural color coating 2 has an obvious reflection peak, the wavelength range of the reflection peak is 575-675nm, the peak value of the reflection peak is 625nm, the peak reflectivity is 19%, and the transmittance is 86.9%.

[0037] Reference Figures 4-5 , a third embodiment of the shell based on structural color coating of the utility model is proposed:

[0038] A shell based on structural color coating includes a light-transmitting plastic substrate 1 with a thickness of 500 μm, which is a PC board. The upper surface of the light-transmitting plastic substrate 1 is coated with a structural color coating 2 with a thickness of 20 μm through micro-concaves, and the structural color coating 2 is evenly provided with three-dimensional photonic crystals for reflecting visible light.

[0039] The upper surface of the structural color coating 2 is coated with UV texture glue, and the surface texture is transferred to the UV texture glue, and completely cured under a mercury lamp, so that a texture layer 3 with a thickness of 5 to 30 μm is formed on the upper surface of the structural color coating 2. Specifically, the surface texture is a woven pattern.

[0040] A PVD coating layer 5 is processed on the upper surface of the texture layer 3. The PVD coating layer 5 is screen-printed with an orange-yellow ink layer 4, and then baked and thermally cured to obtain a finished housing.

[0041] like Figure 5 As shown, at an angle perpendicular to the light-transmitting plastic substrate 1, the light-transmitting plastic substrate 1 coated with the structural color coating 2 has an obvious reflection peak, the wavelength range of the reflection peak is 490-575nm, the peak value of the reflection peak is 520nm, the peak reflectivity is 32%, and the transmittance is 86.6%.

[0042] Reference Figure 4 and Figure 6 , a fourth embodiment of the present utility model is proposed, which is a shell based on a structural color coating:

[0043] A shell based on structural color coating includes a light-transmitting plastic substrate 1 with a thickness of 640 μm, which is a PC / PMMA composite board. The upper surface of the light-transmitting plastic substrate 1 is coated with a structural color coating 2 with a thickness of 10 μm through micro-concaves, and the structural color coating 2 is evenly provided with three-dimensional photonic crystals for reflecting visible light.

[0044] The upper surface of the structural color coating 2 is coated with UV texture glue, and the surface texture is transferred to the UV texture glue, and completely cured under a mercury lamp, so that a texture layer 3 with a thickness of 5 to 30 μm is formed on the upper surface of the structural color coating 2. Specifically, the surface texture is water ripples.

[0045] A PVD coating layer 5 is processed on the upper surface of the texture layer 3. The PVD coating layer 5 is screen-printed with a green ink layer 4, and then baked and thermally cured to obtain a finished housing.

[0046] like Figure 6 As shown, at an angle perpendicular to the light-transmitting plastic substrate 1, the light-transmitting plastic substrate 1 coated with the structural color coating 2 has an obvious reflection peak, the wavelength range of the reflection peak is 475-550nm, the peak value of the reflection peak is 511nm, the peak reflectivity is 27%, and the transmittance is 87.6%.

[0047] In other embodiments, the light-transmitting plastic substrate 1 coated with the structural color coating 2 also has an obvious reflection peak, the wavelength range of the reflection peak is 50-100 nm, the reflectivity of the reflection peak is 10-80%, and the transmittance of the structural color coating 2 is 80-90%.

[0048] The novel three-dimensional photonic crystal of the present embodiment is formed by orderly arrangement of nano-microspheres with a particle size of 100 to 400 nm. Specifically, the nano-microspheres are at least one of polymer microspheres, inorganic microspheres, and polymer-inorganic composite microspheres. The inorganic microspheres include at least one of silicon dioxide, titanium dioxide, ferroferric oxide, and zinc sulfide.

[0049] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A shell based on structural color coating, characterized in that: The invention comprises a light-transmitting plastic substrate (1), wherein a structural color coating (2) and a texture layer (3) are sequentially stacked on the upper surface of the light-transmitting plastic substrate (1), and an ink layer (4) is arranged on the lower surface of the light-transmitting plastic substrate (1) or the texture layer (3); and the structural color coating (2) is uniformly provided with three-dimensional photonic crystals for reflecting visible light.

2. A shell based on structural color coating according to claim 1, characterized in that: The thickness of the structural color coating (2) is 5 to 30 μm.

3. The shell based on structural color coating according to claim 1, characterized in that: The light transmittance of the light-transmitting plastic substrate (1) coated with the structural color coating (2) is 80 to 90%.

4. The shell based on structural color coating according to claim 1, characterized in that: The three-dimensional photonic crystal is formed by orderly arrangement of nano-microspheres with a particle size of 100 to 400 nm.

5. The shell based on structural color coating according to claim 4, characterized in that: The three-dimensional photonic crystal is used to reflect visible light with a wavelength of λ1-λ2, the difference between λ2 and λ1 is 50-100nm, and the reflectivity of the structural color coating (2) to visible light with a wavelength of λ1-λ2 is 10-80%.

6. The shell based on structural color coating according to claim 1, characterized in that: The texture layer (3) comprises UV texture glue and a surface texture transferred onto the UV texture glue.

7. The shell based on structural color coating according to claim 1, characterized in that: The texture layer (3) has a thickness of 5 to 20 μm.

8. The shell based on structural color coating according to claim 1, characterized in that: The light-transmitting plastic substrate (1) is one of a PC board, a PC / PMMA composite board, a PET board, and a glass fiber reinforced composite board.

9. The shell based on structural color coating according to claim 1, characterized in that: The thickness of the light-transmitting plastic substrate (1) is 450-700 μm.

10. The shell based on structural color coating according to claim 1, characterized in that: The texture layer (3) is connected to the ink layer (4) via a PVD coating (5).

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