Photoluminescent back cover plate and smart device

Abstract

The utility model discloses a photoluminescence back cover plate, include: glass substrate, quantum dot film layer is set on one side surface of glass substrate, the back cover ink layer is set on one side surface of quantum dot film layer away from glass substrate. This photoluminescence back cover plate has photoluminescence characteristic to satisfy individualized demand. The utility model discloses a kind of intelligent equipment, including above-mentioned photoluminescence back cover plate.

Description

Technical Field

[0001] This utility model relates to the field of accessories for smart devices, and in particular to a photoluminescent back cover and a smart device. Background Technology

[0002] With the development of electronic technology, smart devices such as mobile phones and tablets are becoming increasingly intelligent, making them indispensable tools in people's daily lives, work, and studies.

[0003] At the same time, people have increasingly higher demands for the visual and tactile sensory experience of smart devices. Currently, the colors of the back covers of smart devices on the market are too limited, failing to meet people's needs for personalization and their pursuit of stylish and aesthetically pleasing designs. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a photoluminescent back cover with photoluminescent properties to meet personalized needs.

[0005] This utility model also provides a smart device, including the aforementioned photoluminescent back cover.

[0006] The technical problem to be solved by this utility model is achieved through the following technical solution:

[0007] A photoluminescent back cover, comprising:

[0008] Glass substrate;

[0009] A quantum dot film is disposed on one side surface of the glass substrate;

[0010] A reverse ink layer is disposed on the surface of the quantum dot film layer away from the glass substrate.

[0011] Furthermore, the quantum dot film includes multiple photoluminescent regions, each photoluminescent region being divided into at least two groups, and the photoluminescent regions in different groups differ in at least one of the excitation light band and the emission light band.

[0012] Furthermore, the quantum dot film layer uses different quantum dot materials to create different groups of photoluminescent regions.

[0013] Furthermore, the quantum dot material is cadmium selenide quantum dots, cadmium sulfide quantum dots, indium arsenide quantum dots, or indium phosphide quantum dots.

[0014] Furthermore, the thickness of the quantum dot film is 50-100 nm.

[0015] Furthermore, the photoluminescent back cover also includes a reflective film layer, which is disposed between the quantum dot film layer and the reverse cover ink layer.

[0016] Furthermore, the photoluminescent back cover also includes a high-hardness film layer, which is disposed on the surface of the glass substrate away from the quantum dot film layer.

[0017] Furthermore, the high-hardness film layer includes a sodium silicate film layer and a titanium diboride film layer, wherein the sodium silicate film layer is disposed on one side surface of the glass substrate, and the titanium diboride film layer is disposed on the side surface of the sodium silicate film layer away from the glass substrate.

[0018] Furthermore, the thickness of the sodium silicate film is 50-100 nm, and the thickness of the titanium diboride film is 100-200 nm.

[0019] A smart device comprising the aforementioned photoluminescent back cover.

[0020] The present invention has the following beneficial effects: The photoluminescent back cover of the present invention is formed by sequentially depositing the quantum dot film layer and the reverse cover ink layer on the back surface of the glass substrate. The quantum dot film layer has photoluminescent characteristics, that is, when not irradiated by excitation light of a specific wavelength, the quantum dot film layer does not emit light and exhibits its own inherent color. When irradiated by excitation light of a specific wavelength, the quantum dot film layer can emit colored light different from its own inherent color, so that the photoluminescent back cover can exhibit different colors under the illumination of light of different wavelengths to meet personalized needs; and the reverse cover ink layer, in addition to protecting the quantum dot film layer, can also prevent the colored light emitted by the quantum dot film layer from leaking out from the back. Attached Figure Description

[0021] Figure 1 A schematic diagram of the stacked structure of the photoluminescent back cover plate provided by this utility model.

[0022] Figure 2 A schematic diagram of the planar structure of the quantum dot film layer in the photoluminescent back cover provided by this utility model.

[0023] Figure 3 A schematic diagram of the planar structure of the quantum dot film layer in another photoluminescent back cover plate provided by this utility model.

[0024] Figure 4 A schematic diagram of the stacked structure of another photoluminescent back cover plate provided by this utility model.

[0025] Figure 5 A schematic diagram of the stacked structure of another photoluminescent back cover plate provided by this utility model. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments, examples of which are shown in the drawings. Throughout the drawings, the same or similar reference numerals denote 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 intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0029] 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.

[0030] Example 1

[0031] A photoluminescent back cover, comprising:

[0032] Glass substrate 1;

[0033] A quantum dot film 2 is disposed on one side surface of the glass substrate 1;

[0034] The reverse ink layer 3 is disposed on the surface of the quantum dot film layer 2 away from the glass substrate 1.

[0035] The photoluminescent back cover of this invention is formed by sequentially depositing the quantum dot film layer 2 and the reverse cover ink layer 3 on the back surface of the glass substrate 1. The quantum dot film layer 2 has photoluminescent characteristics, that is, when not irradiated by excitation light of a specific wavelength, the quantum dot film layer 2 does not emit light and exhibits its own inherent color. When irradiated by excitation light of a specific wavelength, the quantum dot film layer 2 can emit colored light different from its own inherent color, so that the photoluminescent back cover can exhibit different colors under the illumination of light of different wavelengths to meet personalized needs. The reverse cover ink layer 3, in addition to protecting the quantum dot film layer 2, can also prevent the colored light emitted by the quantum dot film layer 2 from leaking out from the back.

[0036] In some examples, the quantum dot film 2 does not emit light under visible light irradiation, but emits colored light different from its inherent color under ultraviolet light irradiation, so that the photoluminescent back cover can exhibit different colors under indoor and outdoor light through the quantum dot film 2.

[0037] In this embodiment, the reverse ink layer 3 is a black ink layer with a thickness of approximately 4-8 μm, to minimize the leakage of colored light emitted from the quantum dot film layer 2 from the back side. The thickness of the quantum dot film layer 2 is 50-100 nm.

[0038] Preferably, the quantum dot film 2 includes a plurality of photoluminescent regions 21, each photoluminescent region 21 being divided into at least two groups, and the photoluminescent regions 21 in different groups differ in at least one of the excitation light band and the emission light band.

[0039] When designing the quantum dot film layer 2, different appearance requirements can be achieved by adjusting the total number of photoluminescent regions 21, the number of groups, the number of regions in each group of photoluminescent regions 21, and the distribution of regions.

[0040] In some examples, such as Figure 2 As shown, a first set of photoluminescent regions 21a can be used to form specific patterns such as logos, numbers, and text, and a second set of photoluminescent regions 21b can be used to form the background pattern of the aforementioned specific patterns. The first set of photoluminescent regions 21a and the second set of photoluminescent regions 21b have different excitation light wavelengths, so that the photoluminescent back cover can display the aforementioned specific patterns in positive and negative forms under different light illumination. For example, under ultraviolet light illumination, the specific pattern emits colored light to provide a positive pattern, and under visible light illumination, the background pattern emits colored light to provide a negative pattern.

[0041] In some examples, such as Figure 3As shown, a first set of photoluminescent regions 21a can be used to form a first gradient pattern, and a second set of photoluminescent regions 21b can be used to form a second gradient pattern. The first set of photoluminescent regions 21a and the second set of photoluminescent regions are interleaved. For example, along a specific direction, the number and density of the first set of photoluminescent regions 21a gradually increase, while the number and density of the second set of photoluminescent regions 21b gradually decrease. The first set of photoluminescent regions 21a and the second set of photoluminescent regions 21b have the same excitation light wavelength and different emission light wavelengths, so that the photoluminescent back cover can simultaneously display the first gradient pattern and the second gradient pattern of different colors under the same light illumination. For example, under visible light illumination, the first gradient pattern and the second gradient pattern emit different colored lights respectively.

[0042] The quantum dot film 2 is made of different groups of photoluminescent regions 21 using different quantum dot materials. The quantum dot materials may be, but are not limited to, cadmium selenide quantum dots, cadmium sulfide quantum dots, indium arsenide quantum dots, or indium phosphide quantum dots.

[0043] Example 2

[0044] As an optimization of Embodiment 1, in this embodiment, such as Figure 4 As shown, the photoluminescent back cover also includes a reflective film layer 4, which is disposed between the quantum dot film layer 2 and the reverse cover ink layer 3.

[0045] The photoluminescent back cover of this utility model improves the utilization rate of colored light by setting the reflective film layer 4 between the quantum dot film layer 2 and the reverse cover ink layer 3, thereby reflecting the colored light emitted from the back of the quantum dot film layer 2 to the front.

[0046] In this embodiment, the reflective film layer 4 is a silver-plated film layer or an aluminum-plated film layer, etc., with a thickness of 4.5-188μm.

[0047] Example 3

[0048] As an optimization of Embodiment 1 or Embodiment 2, in this embodiment, such as Figure 5 As shown, the photoluminescent back cover also includes a high-hardness film layer 5, which is disposed on the surface of the glass substrate 1 away from the quantum dot film layer 2.

[0049] The photoluminescent back cover of this utility model protects the front and side surfaces of the glass substrate 1 by providing the high-hardness film layer 5 on the front and side surfaces of the glass substrate 1, thereby increasing the surface hardness and preventing the front and side surfaces of the glass substrate 1 from being scratched by hard objects.

[0050] Preferably, the high-hardness film layer 5 includes a sodium silicate film layer 51 and a titanium diboride film layer 52. The sodium silicate film layer 51 is disposed on one side surface of the glass substrate 1, and the titanium diboride film layer 52 is disposed on the side surface of the sodium silicate film layer 51 away from the glass substrate 1.

[0051] The sodium silicate film 51 and the titanium diboride film 52 have a strong bonding ability. After they are combined, their hardness, wear resistance and corrosion resistance can be significantly improved. Moreover, the titanium diboride film 52 has good heat dissipation performance, which helps to achieve rapid heat dissipation of the battery of smart devices.

[0052] In this embodiment, the thickness of the sodium silicate film 51 is 50-100 nm, and the thickness of the titanium diboride film 52 is 100-200 nm.

[0053] Example 4

[0054] A smart device includes the photoluminescent back cover plate described in Embodiment 1, Embodiment 2, or Embodiment 3.

[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 photoluminescent back cover, characterized in that, include: Glass substrate; A quantum dot film is disposed on one side surface of the glass substrate; A reverse ink layer is disposed on the surface of the quantum dot film layer away from the glass substrate. When not irradiated by excitation light of a specific wavelength, the quantum dot film layer does not emit light and exhibits its own inherent color. When irradiated by excitation light of a specific wavelength, the quantum dot film layer can emit colored light different from its own inherent color, so that the photoluminescent back cover can exhibit different colors under light irradiation of different wavelengths.

2. The photoluminescent back cover plate according to claim 1, characterized in that, The quantum dot film includes multiple photoluminescent regions, each of which is divided into at least two groups, and the photoluminescent regions in different groups differ in at least one of the excitation light band and the emission light band.

3. The photoluminescent back cover plate according to claim 2, characterized in that, The quantum dot film layer uses different quantum dot materials to create different groups of photoluminescent regions.

4. The photoluminescent back cover plate according to claim 3, characterized in that, The quantum dot material is cadmium selenide quantum dots, cadmium sulfide quantum dots, indium arsenide quantum dots, or indium phosphide quantum dots.

5. The photoluminescent back cover plate according to claim 1, characterized in that, The thickness of the quantum dot film is 50-100 nm.

6. The photoluminescent back cover plate according to claim 1, characterized in that, The photoluminescent back cover also includes a reflective film layer, which is disposed between the quantum dot film layer and the reverse cover ink layer.

7. The photoluminescent back cover plate according to claim 1, characterized in that, The photoluminescent back cover also includes a high-hardness film layer, which is disposed on the surface of the glass substrate away from the quantum dot film layer.

8. The photoluminescent back cover plate according to claim 7, characterized in that, The high-hardness film layer includes a sodium silicate film layer and a titanium diboride film layer. The sodium silicate film layer is disposed on one side surface of the glass substrate, and the titanium diboride film layer is disposed on the side surface of the sodium silicate film layer away from the glass substrate.

9. The photoluminescent back cover plate according to claim 8, characterized in that, The thickness of the sodium silicate film is 50-100 nm, and the thickness of the titanium diboride film is 100-200 nm.

10. A smart device, characterized in that, Includes the photoluminescent back cover as described in claim 1.

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