Film-coated cover plate with photochromic function

Abstract

The utility model discloses a film-coated cover plate with a photosensitive color-changing function, which relates to the field of display screens and comprises a substrate, the substrate is provided with a front surface and a back surface, the front surface of the substrate is provided with a film-coated layer, the film-coated layer comprises a chromium carbide layer and a titanium nitride layer which are stacked, and the back surface of the substrate is provided with a photosensitive color-changing ink layer and a protective layer. The protective layer covers the photosensitive color-changing ink layer, and the photosensitive color-changing ink layer can respond to at least two different illumination intensities, so that the photosensitive color-changing ink layer shows multi-stage color change under different illumination intensities, the hardness and the wear resistance of the cover plate are remarkably improved, the chemical stability of the cover plate is enhanced, and the service life of the cover plate is prolonged. The photosensitive color-changing ink layer provides a unique photosensitive color-changing function, the protective layer effectively prevents the photosensitive color-changing ink from being scratched and abraded, the functionality and integrity of the ink layer are ensured, the comprehensive performance of the cover plate is improved, the pursuit of modern electronic products for attractiveness and functions is met, and the product competitiveness is improved.

Description

Technical Field

[0001] This utility model relates to the field of display screen technology, and in particular to a coated cover plate with photosensitive color-changing function. Background Technology

[0002] With the rapid development of technological products, consumers have increasingly higher requirements for display screen covers, especially in terms of hardness, wear resistance, chemical stability, and appearance design.

[0003] Patent application number CN201410563487.4 discloses a display panel, which includes: a first substrate and a second substrate adjacent to each other, the first substrate being adjacent to a light-emitting surface and the second substrate being adjacent to a backlight surface. The display panel is characterized in that it further includes a photosensitive color-changing film layer, wherein: the photosensitive color-changing film layer is disposed on the side of the second substrate away from the first substrate; the photosensitive color-changing film layer can change color under light irradiation and restore its original color when the light irradiation stops; and no color film layer is disposed in the first substrate.

[0004] For example, patent application number 201920992056.8 discloses a flexible display screen, including a display module and a cover plate covering the display module. The cover plate has a photosensitive color-changing ink layer and a base color ink layer stacked in sequence near the edge of the side facing the display module. The flexible display screen can change its color according to the changes in external light, bringing a better user experience.

[0005] While traditional glass covers can meet basic needs, they often suffer from scratches, wear, and chemical corrosion when faced with complex usage environments and high-intensity user operations. Meanwhile, the market demand for products with unique visual effects is growing. Therefore, this application proposes a coated cover with photosensitive color-changing function to solve the above problems. Utility Model Content

[0006] Therefore, it is necessary to address the aforementioned technical issues by providing a coated cover plate with photosensitive color-changing function. This significantly improves the cover plate's hardness and wear resistance, enabling it to withstand any daily wear and tear. It also enhances the cover plate's chemical stability. The photosensitive color-changing ink layer provides a unique photosensitive color-changing function, changing color according to changes in light, adding fun and aesthetics to the product. At the same time, the protective layer effectively prevents scratches and wear on the photosensitive color-changing ink, ensuring the functionality and integrity of the ink layer. This improves the overall performance of the cover plate, meets the modern electronic product's pursuit of both aesthetics and functionality, and enhances product competitiveness.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A photosensitive color-changing coated cover plate includes a substrate having a front side and a back side. The front side of the substrate has a coating layer comprising a stacked chromium carbide layer and a titanium nitride layer. The back side of the substrate has a photosensitive color-changing ink layer and a protective layer, the protective layer covering the photosensitive color-changing ink layer. The photosensitive color-changing ink layer is responsive to at least two different light intensities, so that the photosensitive color-changing ink layer exhibits multi-level color changes under different light intensities.

[0009] In a preferred embodiment of the photosensitive color-changing coated cover plate provided by this utility model, the substrate is a transparent glass plate or a transparent acrylic plate.

[0010] In a preferred embodiment of the photosensitive color-changing coating cover provided by this utility model, the chromium carbide layer and the titanium nitride layer are multi-layered and alternately stacked, and the chromium carbide layer is attached to the front side of the substrate.

[0011] In a preferred embodiment of the photosensitive color-changing coated cover plate provided by this utility model, the chromium carbide layer and the titanium nitride layer are three layers.

[0012] In a preferred embodiment of the photosensitive color-changing coated cover plate provided by this utility model, the thickness of the chromium carbide layer is 10-15 nanometers, and the thickness of the titanium nitride layer is 5-10 nanometers.

[0013] In a preferred embodiment of the photosensitive color-changing coated cover plate provided by this utility model, the thickness of the photosensitive color-changing ink layer is 8-12 micrometers.

[0014] As a preferred embodiment of the photosensitive color-changing coating cover provided by this utility model, the protective layer is a nickel-aluminum layer with a thickness of 5-10 micrometers.

[0015] As a preferred embodiment of the photosensitive color-changing coating cover provided by this utility model, the substrate includes a visible area and an invisible area arranged around the visible area, and the photosensitive color-changing ink layer is disposed in the invisible area.

[0016] As a preferred embodiment of the photosensitive color-changing coated cover plate provided by this utility model, the invisible area is provided with multiple color-changing areas, the photosensitive color-changing ink layer is disposed in the color-changing areas, and each color-changing area presents a different color under different light intensities.

[0017] As a preferred embodiment of the photosensitive color-changing coated cover plate provided by this utility model, the thermosensitive color-changing ink layer in the color-changing area has one or more photosensitive dyes that respond to different light thresholds, so that the thermosensitive color-changing ink layer in the color-changing area sequentially presents one or more preset colors under different light intensities.

[0018] In a preferred embodiment of the photosensitive color-changing coated cover plate provided by this utility model, the color-changing areas are arranged adjacently or at intervals.

[0019] Compared with existing technologies, this utility model has the following beneficial effects: The photosensitive color-changing coated cover plate provided by this utility model forms an extremely robust front surface by depositing stacked chromium carbide and titanium nitride layers on the front side of the substrate. This surface has extremely high hardness and wear resistance, significantly improving the hardness and wear resistance of the cover plate and enabling it to withstand any daily wear. The titanium nitride layer has good corrosion resistance, and together with the chromium carbide layer, it enhances the cover plate's resistance to chemicals and improves its chemical stability. The photosensitive color-changing ink layer provides a unique photosensitive color-changing function, changing color according to changes in light, adding fun and aesthetics to the product. At the same time, the protective layer effectively prevents scratches and wear of the photosensitive color-changing ink, ensuring the functionality and integrity of the ink layer, improving the overall performance of the cover plate, meeting the modern electronic product's pursuit of both aesthetics and functionality, and enhancing product competitiveness. Attached Figure Description

[0020] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a side view of the overall structure of this utility model;

[0022] Figure 2 This is a planar schematic diagram of the substrate in Embodiment 2 of this utility model;

[0023] Figure 3 This is a schematic diagram of the substrate after screen printing the photosensitive color-changing ink layer in Embodiment 2 of this utility model;

[0024] Figure 4 This is a planar schematic diagram of the substrate in Embodiment 3 of this utility model;

[0025] Figure 5 This is a schematic diagram of the substrate after screen printing the photosensitive color-changing ink layer in Embodiment 3 of this utility model.

[0026] The markings in the diagram are explained as follows:

[0027] 1. Substrate; 101. Visible area; 102. Invisible area; 103. Color-changing area; 2. Chromium carbide layer; 3. Titanium nitride layer; 4. Photosensitive color-changing ink layer; 5. Protective layer. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0029] As described in the background section, with the rapid development of technological products, consumers have increasingly higher requirements for display screen covers, especially in terms of hardness, wear resistance, chemical stability, and appearance design. Although traditional glass covers can meet basic requirements, they often suffer from scratches, wear, and chemical corrosion when faced with complex usage environments and high-intensity user operations. At the same time, the market demand for products with unique visual effects is growing.

[0030] To solve this technical problem, this utility model provides a coated cover plate with photosensitive color-changing function, which is applied in the field of display screens.

[0031] For details, please refer to Figure 1 The photosensitive color-changing coated cover plate specifically includes a substrate 1, which has a front side and a back side. The front side of the substrate 1 is provided with a coating layer, which includes a stacked chromium carbide layer 2 and a titanium nitride layer 3. The back side of the substrate 1 is provided with a photosensitive color-changing ink layer 4 and a protective layer 5. The protective layer 5 covers the photosensitive color-changing ink layer 4. The photosensitive color-changing ink layer 4 can respond to at least two different light intensities, so that the photosensitive color-changing ink layer 4 exhibits multi-level color changes under different light intensities.

[0032] The photosensitive color-changing coated cover plate provided by this utility model forms an extremely robust front surface by depositing and stacking a chromium carbide layer 2 and a titanium nitride layer 3 on the front side of the substrate 1. This surface has extremely high hardness and wear resistance, significantly improving the hardness and wear resistance of the cover plate and enabling it to withstand any daily wear. The titanium nitride layer 3 has good corrosion resistance and, together with the chromium carbide layer 2, enhances the cover plate's resistance to chemicals and improves its chemical stability. The photosensitive color-changing ink layer 4 provides a unique photosensitive color-changing function, changing color according to changes in light, adding fun and aesthetics to the product. At the same time, the protective layer 5 effectively prevents scratches and wear on the photosensitive color-changing ink, ensuring the functionality and integrity of the ink layer, improving the overall performance of the cover plate, meeting the modern electronic product's pursuit of both aesthetics and functionality, and enhancing product competitiveness.

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] Example 1

[0037] Please refer to Figure 1A photosensitive color-changing coated cover plate is provided, comprising a substrate 1 having a front and a back. The front of the substrate 1 is provided with a coating layer comprising a stacked chromium carbide layer 2 and a titanium nitride layer 3. The chromium carbide layer 2, with its extremely high hardness and wear resistance, provides strong physical protection for the substrate 1, preventing scratches and wear. The titanium nitride layer 3 not only has high hardness but also good corrosion resistance and scratch resistance, working synergistically with the chromium carbide layer 2 to further enhance the overall protective performance of the cover plate. The back of the substrate 1 is provided with a photosensitive color-changing ink layer 4 and a protective layer 5, the protective layer 5 covering the photosensitive color-changing ink layer 4. The photochromic ink layer 4 is responsive to at least two different light intensities, allowing it to exhibit multi-level color changes under varying light levels. The thickness of the photochromic ink layer 4 is 8-12 micrometers. Photochromic ink is a special functional ink whose color changes with varying light conditions. It achieves dynamic color effects primarily by adding materials with photochromic properties, such as photochromic dyes or pigments. The photochromic ink layer 4 gives the cover plate the unique function of changing color with light, serving as an indicator of light intensity or specific light conditions. The protective layer 5 is a nickel-aluminum alloy layer with a thickness of 5-10 micrometers. With its high hardness, wear resistance, and good oxidation resistance, the nickel-aluminum alloy layer serves as a protective layer for the ink layer, effectively preventing scratches or wear and ensuring the functionality and integrity of the ink layer.

[0038] In this example, the photosensitive color-changing ink layer 4 contains at least two photosensitive dyes that respond to different ultraviolet light energies or wavelengths. The formulation of the photosensitive color-changing ink layer 4 in this example is as follows: (weight percentage of each component is for reference only).

[0039] The composition includes approximately 1.0% photochromic dye A, approximately 0.5% photochromic dye B, approximately 35% UV-curable acrylic resin, approximately 50% solvent mixture (such as ethyl acetate, cyclohexanone, etc.), approximately 2% photoinitiator, approximately 1% dispersant, approximately 1.5% stabilizer (including UV stabilizer and antioxidant), and approximately 5% plasticizer. Photochromic dye A is a spiropyran, and photochromic dye B is a spirooxypyran. Of course, the weight percentages can be adjusted in practical applications. When different colors are required under various light intensities, other types of photochromic dyes (such as arylenes, naphthylpyrans, or azide-azo dyes) can be added at approximately 0.2-0.5% each (depending on the desired display level).

[0040] During the printing process, photosensitive color-changing ink is uniformly coated onto substrate 1 using screen printing or inkjet printing technology.

[0041] When there is no ultraviolet light, the ink will appear in the preset base color or transparent state because the dyes are in an inactive state.

[0042] When the intensity of ultraviolet light in the environment is low, the first group of photosensitive dyes (such as spiropyrans) are activated, and the ink turns blue;

[0043] When the intensity of ultraviolet light increases to a moderate level, the second group of dyes (such as spirooxypyrans) begins to activate, in addition to the first group of dyes, and the ink turns green.

[0044] When the intensity of ultraviolet light increases further, other optional dyes (such as arylenes, naphthylpyrans, etc.) are activated in succession, and the ink presents red or other combined colors, thereby achieving multi-level color display.

[0045] By combining photosensitive dyes with different response thresholds in the ink formulation, different colors can be presented under multiple lighting conditions such as no light, low light, medium light and high light, thereby intuitively displaying the ambient light intensity and serving as an indicator of light intensity.

[0046] Substrate 1 is a transparent glass plate or a transparent acrylic plate. In some displays, substrate 1 can also be a flexible transparent substrate plate. In this example, substrate 1 is a transparent glass plate.

[0047] The chromium carbide layer 2 and titanium nitride layer 3 are stacked in multiple alternating layers. The chromium carbide layer 2 is deposited on the front side of the substrate 1, and the titanium nitride layer 3 is deposited on the surface of the chromium carbide layer 2 away from the substrate 1. In this example, both the chromium carbide layer 2 and the titanium nitride layer 3 are three layers. The deposition order on the substrate 1 is chromium carbide layer 2, titanium nitride layer 3, chromium carbide layer 2, titanium nitride layer 3, chromium carbide layer 2, and titanium nitride layer 3. The thickness of the chromium carbide layer 2 is 10-15 nanometers, and the thickness of the titanium nitride layer 3 is 5-10 nanometers. The alternating stacking of the chromium carbide layer 2 and the titanium nitride layer 3 forms an extremely robust front surface, significantly improving the hardness and wear resistance of the glass cover, which can withstand any daily wear and tear. The titanium nitride layer 3 has good corrosion resistance, and together with the chromium carbide layer 2, it enhances the cover's resistance to chemicals.

[0048] Example 2

[0049] The photosensitive color-changing coated cover plate provided in Example 1 is further optimized, specifically, as follows: Figure 2-3 As shown,

[0050] The substrate 1 includes a visible area 101 and a non-visible area 102 arranged around the visible area 101. A photosensitive color-changing ink layer 4 is disposed in the non-visible area 102, which is located at the edge of the substrate 11, forming a rectangular frame structure. The width of the photosensitive color-changing ink layer 4 is not greater than the width of the non-visible area 102. The photosensitive color-changing ink layer 4 is formed by screen printing with photosensitive color-changing ink. The photosensitive color-changing of the photosensitive color-changing ink layer 4 will not affect the display effect of the display screen's viewing area.

[0051] Example 3

[0052] The photosensitive color-changing coated cover plate provided in Example 2 is further optimized, specifically, as follows: Figure 4-5 As shown, the invisible area 102 is provided with multiple color-changing areas 103. The photosensitive color-changing ink layer 4 is provided in the color-changing areas 103, and each color-changing area 103 presents a different color under different light intensity. Outdoors, it can change the color of each color-changing area 103 according to the intensity of ultraviolet light from sunlight, thereby providing the cover with a variety of colors, thus improving the aesthetics, and also providing the user with an indication of light intensity based on the change of different colors.

[0053] The thermochromic ink layer in the color-changing area 103 contains one or more photosensitive dyes that respond to different light thresholds. Specifically, each thermochromic ink layer in the color-changing area 103 contains one or more photosensitive dyes. When illuminated, the thermochromic ink layer in the color-changing area 103 sequentially displays one or more preset colors under different light intensities, thus enabling the display of multiple colors during color changes and further enhancing the color richness of the cover plate. The color-changing areas 103 can be arranged adjacently or intermittently. The color-changing areas 103 can also adopt patterned shapes, such as animal patterns or number patterns, further adding to the product's appeal.

[0054] The working principle of the photosensitive color-changing coated cover plate provided by this utility model is as follows: First, on the front side of the substrate 1, a chromium carbide layer 2, a titanium nitride layer 3, a chromium carbide layer 2, a titanium nitride layer 3, a chromium carbide layer 2, and a titanium nitride layer 3 are sequentially deposited using techniques such as magnetron sputtering. The front side uses alternating stacking of chromium carbide and titanium nitride to form a six-layer composite coating. Chromium carbide, with its extremely high hardness and wear resistance, provides strong physical protection for the cover plate; while titanium nitride, with its high hardness, good corrosion resistance and scratch resistance, works synergistically with chromium carbide to further improve the overall performance of the cover plate. On the back side of the cover plate, a photosensitive color-changing ink layer 4 is screen-printed, which changes color according to changes in light, providing a dynamic visual effect and increasing the product's interest and aesthetics. A nickel-aluminum layer is plated as a protective layer 5 for the photosensitive color-changing ink layer 4, effectively preventing the ink from being scratched or worn, and ensuring the functionality and integrity of the ink layer. It combines alternating stacks of chromium carbide and titanium nitride, along with photochromic ink and a nickel-aluminum protective layer 5, to achieve enhanced physical properties, chemical stability, and unique visual effects, meeting the dual demands of modern technological products for high performance and aesthetics.

[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A coated cover plate with photosensitive color-changing function, comprising a substrate having a front side and a back side, characterized in that, The front side of the substrate is provided with a coating layer, which includes a stacked chromium carbide layer and a titanium nitride layer. The back side of the substrate is provided with a photosensitive color-changing ink layer and a protective layer. The protective layer covers the photosensitive color-changing ink layer. The photosensitive color-changing ink layer can respond to at least two different light intensities, so that the photosensitive color-changing ink layer exhibits multi-level color changes under different light intensities.

2. A coated cover plate with photosensitive color-changing function according to claim 1, characterized in that, The substrate is a transparent glass plate or a transparent acrylic plate.

3. A coated cover plate with photosensitive color-changing function according to claim 1, characterized in that, The chromium carbide layer and titanium nitride layer are multi-layered and alternately stacked, and the chromium carbide layer is attached to the front side of the substrate.

4. A coated cover plate with photosensitive color-changing function according to claim 1 or 3, characterized in that, The thickness of the chromium carbide layer is 10-15 nanometers, and the thickness of the titanium nitride layer is 5-10 nanometers.

5. A coated cover plate with photosensitive color-changing function according to claim 1, characterized in that, The thickness of the photosensitive color-changing ink layer is 8-12 micrometers.

6. A coated cover plate with photosensitive color-changing function according to claim 1, characterized in that, The protective layer is a nickel-aluminum layer with a thickness of 5-10 micrometers.

7. A coated cover plate with photosensitive color-changing function according to any one of claims 1-6, characterized in that, The substrate includes a visible area and a non-visible area surrounding the visible area, and the photosensitive color-changing ink layer is disposed in the non-visible area.

8. A coated cover plate with photosensitive color-changing function according to claim 7, characterized in that, The invisible area has multiple color-changing zones, and the photosensitive color-changing ink layer is located in the color-changing zones. Each color-changing zone presents a different color under different light intensities.

9. A coated cover plate with photosensitive color-changing function according to claim 8, characterized in that, The thermochromic ink layer in the color-changing area has one or more photosensitive dyes that respond to different light thresholds, so that the thermochromic ink layer in the color-changing area sequentially presents one or more preset colors under different light intensities.

10. A coated cover plate with photosensitive color-changing function according to claim 8, characterized in that, The color-changing areas are arranged adjacently or at intervals.

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