Multifunctional composite coated glass cover plate
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TRULY OPTO ELECTRONICS
- Filing Date
- 2025-05-19
- Publication Date
- 2026-07-14
Smart Images
Figure CN224490327U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cover plate technology, and more specifically, to a multifunctional composite coated glass cover plate. Background Technology
[0002] With the widespread use and diversified functions of electronic products, the requirements for display cover plates are also increasing. While traditional cover plate materials can meet basic needs, they fall short in terms of durability, optical performance, aesthetics, and thermal management. Especially in portable devices such as smartphones and tablets, cover plates must withstand frequent touches, scratches, and environmental changes. Therefore, developing a cover plate coating that integrates high hardness, high light transmittance, chemical corrosion resistance, flame retardancy, and aesthetics has become an urgent problem for the industry. Utility Model Content
[0003] The purpose of this invention is to propose a multifunctional composite coated glass cover, aiming to develop a multifunctional cover to meet new industry requirements.
[0004] Specifically, the technical solution of this utility model is as follows: a multifunctional composite coated glass cover is proposed, including a glass substrate, a front coating layer and a back ink layer; the front coating layer includes, from the inside to the outside, a polysulfonated fluoride layer, an aluminum hydroxide layer, an aluminum nitride layer and a chromium-nickel alloy layer; the back ink layer is disposed in the back frame area of the glass substrate, and a chromium-nickel alloy protective layer is disposed below it; the polysulfonated fluoride layer is in direct contact with the surface of the glass substrate; wherein, the upper surface of the chromium-nickel alloy layer of the front coating layer is also provided with a photochromic resin layer, and the surface of the photochromic resin layer is configured with a regularly arranged protruding structure.
[0005] As a preferred technical solution, the protrusion structure is circular in shape with a diameter of 10μm and a height of 6μm.
[0006] As a preferred technical solution, the thickness of the polysulfonated fluoroethylene layer is 50-100nm, the thickness of the aluminum hydroxide layer is 20-30nm, the thickness of the aluminum nitride layer is 30-50nm, and the thickness of the chromium-nickel alloy layer is 50-80nm; the thickness of the chromium-nickel alloy protective layer is 20-30nm, and its surface roughness Ra≤0.05μm.
[0007] As a preferred technical solution, the aluminum hydroxide layer contains nano-sized α-Al(OH)3 particles with a particle size distribution between 30-50 nm.
[0008] As a preferred technical solution, a transition layer is provided between the aluminum nitride layer and the chromium-nickel alloy layer. This transition layer is an AlN-CrNi gradient composite layer with a thickness of 5-8 nm.
[0009] As a preferred technical solution, the back ink layer adopts a composite system of photochromic ink and thermochromic ink, which contains spiropyran photosensitive microcapsules with a particle size of 100-150nm and bisphenol A type thermochromic material.
[0010] As a preferred technical solution, the color change response time of the ink layer on the back is ≤30 seconds, and the color change amplitude ΔE≥15.
[0011] As a preferred technical solution, a buffer layer is provided between the chromium-nickel alloy protective layer and the ink layer. This buffer layer is a polyurethane-siloxane copolymer with a thickness of 2-5 μm.
[0012] As a preferred technical solution, the glass substrate is chemically strengthened aluminosilicate glass with a surface compressive stress ≥700MPa and a Vickers hardness ≥650HV.
[0013] As a preferred technical solution, the polysulfonated fluoroethylene layer is prepared by plasma-enhanced chemical vapor deposition; the aluminum nitride layer is prepared by pulsed DC reactive magnetron sputtering.
[0014] The beneficial effects of this utility model are: the core of this patent lies in the organic combination of a variety of high-performance materials through a carefully designed layered structure to form a cover plate coating layer with excellent comprehensive performance.
[0015] First, based on a glass substrate with high light transmittance and structural stability, a polysulfonated fluoride layer, an aluminum hydroxide layer, an aluminum nitride layer, and a chromium-nickel alloy layer are sequentially stacked. The thickness and processing of each layer are precisely controlled to achieve optimal performance matching.
[0016] The polysulfonated fluoroethylene layer provides a chemically resistant and low-friction substrate; the aluminum hydroxide layer enhances flame retardancy and hardness; the aluminum nitride layer further improves thermal management and wear resistance with its high thermal conductivity and high hardness; and the outermost chromium-nickel alloy layer gives the cover plate high hardness and corrosion resistance, while adding metallic luster and aesthetics.
[0017] A photochromic resin layer is also provided on the outermost layer. The molecular structure of the photochromic material undergoes a reversible reaction in response to changes in light, thereby altering its optical properties (such as color and light transmittance). The resulting multifunctional composite cover plate can have a wide range of applications, such as smart window glass.
[0018] Furthermore, the photosensitive color-changing ink layer on the back bezel area, combined with the underlying chromium-nickel alloy layer, not only adds to the product's appeal but also provides additional protection. This layered design optimizes the performance of each layer's materials and significantly improves the cover plate's durability, optical performance, aesthetics, thermal management, and flame retardancy. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the structure of a multifunctional composite coated glass cover plate proposed in this utility model embodiment. Figure 1 ;
[0021] Figure 2 A schematic diagram of the structure of a multifunctional composite coated glass cover plate proposed in this utility model embodiment. Figure 2 .
[0022] Explanation of reference numerals in the attached figures: 1. Glass substrate; 2. Front coating layer; 3. Ink layer; 4. Chromium-nickel alloy protective layer; 21. Polysulfonated fluorine layer; 22. Aluminum hydroxide layer; 23. Aluminum nitride layer; 24. Chromium-nickel alloy layer; 5. Transition layer; 6. Photochromic resin layer; 7. Buffer layer. Detailed Implementation
[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.
[0024] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.
[0025] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.
[0026] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.
[0027] It should be noted that "multiple" as mentioned in this article refers to two or more.
[0028] Example
[0029] like Figure 1-2 As shown, this embodiment presents a multifunctional composite coated glass cover structure, including a glass substrate 1, a front coating layer 2, and a back ink layer 3. The front coating layer 2 comprises, from the inside out, a polysulfonated fluoride layer 21, an aluminum hydroxide layer 22, an aluminum nitride layer 23, and a chromium-nickel alloy layer 24. The back ink layer 3 is disposed in the back edge area of the glass substrate 1, and a chromium-nickel alloy protective layer 4 is disposed below it. The polysulfonated fluoride layer 21 is in direct contact with the surface of the glass substrate 1. The upper surface of the chromium-nickel alloy layer 24 of the front coating layer 2 is also provided with a photochromic resin layer 6, and the surface of the photochromic resin layer 6 is configured with a regularly arranged protruding structure.
[0030] Among them, the core principle of photochromic resin is:
[0031] (1) Molecular-level photoresponse mechanism
[0032] Photochromic molecules (such as spiropyran, azobenzene, and diarylethylene) undergo reversible isomerization under irradiation with specific wavelengths (usually ultraviolet or visible light):
[0033] When exposed to light: the molecule changes from a stable state (A) to an excited state (B), and the structural change leads to a change in the absorption spectrum (color development).
[0034] When light exposure is stopped, the molecules recover to their initial state (fading) through thermal relaxation or reverse photoreaction.
[0035] Example: Spiropyran (colorless) → UV irradiation → open-ring isomer (color, such as blue / purple).
[0036] Diarylethylene (colorless) → Ultraviolet light → Closed-ring structure (color develops).
[0037] (2) The role of resin matrix
[0038] Resins (such as polyurethane and acrylate) used as carriers must meet the following requirements:
[0039] High transparency: It does not affect the optical properties of photochromic molecules.
[0040] Stability: Protects molecules from degradation by oxygen and moisture.
[0041] Uniform dispersion: Prevents molecular aggregation that leads to uneven color change.
[0042] 2. Technical Implementation of Glass Surface Coating
[0043] (1) Coating process implementation
[0044] Sol-gel method: Photochromic molecules are embedded in an inorganic-organic hybrid resin, which is then applied to the glass surface by spin coating, spraying, or immersion coating, and then cured.
[0045] UV-curable resin: Photochromic materials are premixed into UV resin, coated, and then cured under ultraviolet light to form a hard film.
[0046] Laminated method: A photochromic resin film is sandwiched between two layers of glass (such as automotive dimming glass).
[0047] (2) Key performance parameters
[0048] Response speed: typically a few seconds to a few minutes (depending on the molecular type and resin hardness).
[0049] Cycle life: >10 4 Secondary (high-quality diarylethylene materials).
[0050] Wavelength selectivity: Can be designed to be sensitive to ultraviolet light (300–400 nm) or visible light.
[0051] Preferably, the raised structure is circular in shape, with a diameter of 10 μm and a height of 6 μm. The surface of the photochromic resin layer 6 exhibits a... Figure 1-2 The mushroom-shaped micro-protrusion structure shown is not accidental, but rather an active design based on optical performance optimization and functional enhancement. Its principles and advantages can be analyzed from the following dimensions:
[0052] 1. Optical enhancement:
[0053] 1) Improved light response efficiency: The raised structure design increases the specific surface area: The mushroom-shaped micro-raised structure significantly increases the effective light-receiving area of the resin layer, allowing more photochromic molecules to be exposed to light, accelerating the isomerization reaction (the color development / fading speed is increased by about 30%-50%).
[0054] 2) Reduce light reflection loss:
[0055] The micro-protruding surface forms a gradient refractive index layer, which reduces Fresnel reflection at the glass-resin interface (especially under oblique incident light), enhances the transmittance of ultraviolet / visible light, and ensures that photochromic molecules are fully excited.
[0056] 2. Integrated structural and functional design
[0057] 1) Directional Light Scattering Control: The mushroom-shaped protrusions (e.g., a hemispherical apex with a thin stem) selectively scatter incident light at specific angles, achieving: Uniform color rendering: Avoiding uneven color caused by localized overexposure. Privacy protection: The microstructure causes diffuse reflection after the glass changes color, blocking external views (e.g., in smart dimming glass applications). Mechanical stability: The gaps between the micro-protrusions buffer thermal / mechanical stress, preventing the resin layer from cracking (especially suitable for environments with large temperature differences).
[0058] 3. The inevitable result of the preparation process
[0059] Mushroom-shaped protrusions are often formed through the following methods, and are strongly correlated with process parameters:
[0060] 1) Phase separation method: During the resin curing process, solvent evaporation causes microphase separation between photochromic molecules and the matrix, spontaneously forming protrusions (such as local shrinkage differences during UV curing).
[0061] 2) Template method: Using porous anodic aluminum oxide (AAO) or microsphere templates, a mushroom-shaped residual structure is left after etching.
[0062] 3) Self-assembly: After coating, the fluorinated modified resin self-organizes into micro-protrusions due to the difference in surface energy (similar to the "lotus leaf effect" but on a smaller scale).
[0063] Preferably, the thickness of the polysulfonated fluoroethylene layer 21 is 50-100 nm, the thickness of the aluminum hydroxide layer 22 is 20-30 nm, the thickness of the aluminum nitride layer 23 is 30-50 nm, the thickness of the chromium-nickel alloy layer 24 is 50-80 nm, the thickness of the chromium-nickel alloy protective layer 4 is 20-30 nm, and its surface roughness Ra≤0.05 μm.
[0064] Preferably, the aluminum hydroxide layer 22 contains nano-sized α-Al(OH)3 particles with a particle size distribution between 30-50 nm.
[0065] Preferably, a transition layer 5 is provided between the aluminum nitride layer 23 and the chromium-nickel alloy layer 24. The transition layer 5 is an AlN-CrNi gradient composite layer with a thickness of 5-8 nm.
[0066] Preferably, the back ink layer 3 adopts a composite system of photochromic ink and thermochromic ink, which contains spiropyran photosensitive microcapsules with a particle size of 100-150nm and bisphenol A type thermochromic material.
[0067] Preferably, the color change response time of the back ink layer 3 is ≤30 seconds, and the color change amplitude ΔE is ≥15.
[0068] Preferably, a buffer layer 7 is provided between the chromium-nickel alloy protective layer 4 and the ink layer 3. The buffer layer 7 is a polyurethane-siloxane copolymer with a thickness of 2-5 μm.
[0069] Preferably, the glass substrate 1 is chemically strengthened aluminosilicate glass with a surface compressive stress ≥700MPa and a Vickers hardness ≥650HV.
[0070] Preferably, the polysulfonated fluoroethylene layer 21 is prepared by plasma-enhanced chemical vapor deposition; the aluminum nitride layer 23 is prepared by pulsed DC reactive magnetron sputtering.
[0071] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A multifunctional composite coated glass cover plate, characterized in that, The glass substrate, the front coating layer and the back ink layer; the front coating layer comprises, from inside to outside, a polysulfonated fluorinated ethylene layer, an aluminum hydroxide layer, an aluminum nitride layer and a chromium-nickel alloy layer; the back ink layer is arranged on the back frame area of the glass substrate, and a chromium-nickel alloy protective layer is arranged below the back ink layer; the polysulfonated fluorinated ethylene layer is in direct contact with the surface of the glass substrate; wherein the upper surface of the chromium-nickel alloy layer of the front coating layer is further provided with a photochromic resin layer, and the surface of the photochromic resin layer is arranged as regularly arranged convex structures.
2. The multifunctional composite coated glass cover plate according to claim 1, characterized in that, The convex structure is in a circular shape, the diameter is 10 microns, and the height of the convex structure is 6 microns. 3.The multifunctional composite coated glass cover plate of claim 1, wherein, The thickness of the polysulfonated fluorinated ethylene layer is 50-100 nm, the thickness of the aluminum hydroxide layer is 20-30 nm, the thickness of the aluminum nitride layer is 30-50 nm, and the thickness of the chromium-nickel alloy layer is 50-80 nm; the thickness of the chromium-nickel alloy protective layer is 20-30 nm, and the surface roughness Ra thereof is less than or equal to 0.05 microns. 4.The multifunctional composite coated glass cover plate of claim 1, wherein, The aluminum hydroxide layer contains nano-sized alpha-Al(OH)3 particles with a particle size distribution of 30-50 nm. 5.The multifunctional composite coated glass cover plate of claim 4, wherein, A transition layer is arranged between the aluminum nitride layer and the chromium-nickel alloy layer, and the transition layer is an AlN-CrNi gradient composite layer with a thickness of 5-8 nm. 6.The multifunctional composite coated glass cover plate of claim 1, wherein, The color change response time of the back ink layer is less than or equal to 30 seconds, and the color change amplitude ΔE is greater than or equal to 15. 7.The multifunctional composite coated glass cover sheet of claim 1, wherein, A buffer layer is arranged between the chromium-nickel alloy protective layer and the ink layer, and the buffer layer is a polyurethane-siloxane copolymer with a thickness of 2-5 microns. 8.The multi-functional composite coated glass cover sheet according to any one of claims 1-7, wherein, The glass substrate is a chemically strengthened aluminosilicate glass with a surface compressive stress greater than or equal to 700 MPa and a Vickers hardness greater than or equal to 650 HV. 9.The multifunctional composite coated glass cover sheet of claim 8, wherein, The polysulfonated fluorinated ethylene layer is prepared by plasma enhanced chemical vapor deposition; and the aluminum nitride layer is prepared by pulse direct current reaction magnetron sputtering.