A composite functional glass substrate coating structure
By superimposing europium titanate, strontium titanate, lanthanum titanate layers and thermochromic ink layers on a glass substrate, the problem of insufficient dielectric properties and easy scratching of cover plate materials in extreme environments is solved, achieving improved light transmittance, strong stability and aesthetics, making it suitable for high-end electronic products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TRULY OPTO ELECTRONICS
- Filing Date
- 2025-06-10
- Publication Date
- 2026-07-14
AI Technical Summary
Existing display cover materials exhibit problems such as insufficient dielectric properties, susceptibility to scratches, and lack of innovative elements under extreme environments or complex usage scenarios, making it difficult to meet the requirements of high light transmittance, strong stability, and aesthetics.
The design employs a multi-layer coating structure, which includes europium titanate, strontium titanate, and lanthanum titanate layers stacked on a glass substrate, combined with a thermochromic ink layer and a protective polyester resin layer, forming a forward gradient dielectric structure and a reverse stress compensation structure, thereby enhancing dielectric performance and aesthetics.
It achieves high light transmittance, strong stability and good dielectric properties in the cover plate, while also being fun and interactive, enhancing the durability and aesthetics of the product, and is suitable for high-end electronic products.
Smart Images
Figure CN224494044U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cover plate technology, and more specifically, to a composite functional glass substrate coating structure. Background Technology
[0002] With the rapid development of electronic products, the requirements for display cover plates are increasing. They not only need excellent light transmittance and clarity, but also breakthroughs in durability, stability, and aesthetics. Traditional cover plate materials often exhibit problems such as insufficient dielectric properties, susceptibility to scratches, and a lack of innovative elements when facing extreme environments or complex usage scenarios. Therefore, developing a new cover plate coating layer structure that integrates high light transmittance, strong stability, good dielectric properties, and engaging interactive features has become a pressing technical challenge for the industry. Utility Model Content
[0003] The purpose of this invention is to propose a composite functional glass substrate coating structure, which aims to solve some of the technical problems existing in the prior art.
[0004] Specifically, the technical solution of this utility model is as follows: a composite functional glass substrate coating structure is proposed, which includes the following layers from the front to the back of the glass substrate:
[0005] Europium titanate coating layer, serving as the outermost optical functional layer;
[0006] A strontium titanate coating layer is deposited beneath the europium titanate layer;
[0007] A lanthanum titanate coating layer covers the strontium titanate layer;
[0008] A glass substrate serves as the supporting substrate for the multilayer coating structure. A polyvinyl difluoroethylene (PVC) and a polytoluene (ITO) layer are stacked on the lower surface of the viewing area of the glass substrate. The PVC and ITO layer has a thickness of 8-12 micrometers, and the ITO layer has a thickness of 40 nanometers to 60 nanometers.
[0009] A thermochromic ink layer is disposed on the border area on the back of the glass substrate layer;
[0010] The neodymium oxide layer is closely adhered to the underside of the thermochromic ink layer;
[0011] A polyester resin layer serves as a protective encapsulation layer on the back side.
[0012] Among them, europium titanate layer, strontium titanate layer and lanthanum titanate layer form a positive gradient dielectric structure, whose dielectric constant decreases from the outside to the inside, and the difference in dielectric constant between adjacent layers is controlled within the range of 5-15%; neodymium oxide layer and polyester resin layer form a reverse stress compensation structure, and the tensile stress of polyester resin layer is 50-150MPa.
[0013] As a preferred technical solution, the europium titanate layer has a thickness of 50-100 nanometers and is prepared by magnetron sputtering; the strontium titanate layer has a thickness of 30-50 nanometers and a grain size of 20-50 nm; and the lanthanum titanate layer has a thickness of 20-30 nanometers.
[0014] As a preferred technical solution, the thermochromic ink layer includes thermochromic microcapsules with a particle size distribution of 5-20 μm; a UV-curable resin matrix with a refractive index of 1.48-1.52; and a nano-silica dispersant with a particle size of 10-30 nm.
[0015] As a preferred technical solution, the ink layer is formed by screen printing process with a mesh count of 250-400.
[0016] As a preferred technical solution, the neodymium oxide layer is prepared by atomic layer deposition.
[0017] As a preferred technical solution, a transition layer is provided between the lanthanum titanate layer and the glass substrate layer. The transition layer is a composite layer of SiO2 and TiO2, wherein: the thickness of the SiO2 layer is 5-15nm; the surface roughness Ra of the transition layer is ≤1nm, and the bonding strength with the glass substrate is ≥30MPa.
[0018] As a preferred technical solution, the resin layer is formed by a slit coating process, and after curing, the pencil hardness reaches 3H or higher, and the light transmittance loss is less than 2%.
[0019] As a preferred technical solution, a functional surface treatment layer is further provided on the surface of the europium titanate layer, including:
[0020] Superhydrophobic coating: contact angle ≥150°, sliding angle ≤5°, thickness 5-10nm;
[0021] Antistatic layer: Surface resistivity 1×10 6 -1×10 8 Ω / sq, transmittance is affected by less than 0.5%.
[0022] As a preferred technical solution, the optical performance of the coated structure meets the following requirements: average transmittance in the visible light band ≥92%, haze ≤0.3%.
[0023] As a preferred technical solution, the glass substrate is a substrate that has undergone plasma activation treatment with a mixture of hydrofluoric acid and deionized water.
[0024] The beneficial effects of this utility model are as follows: The core of this patent lies in the innovative application of multi-layer coating technology to achieve a comprehensive upgrade of the cover plate's performance. Firstly, the EuTiO3 layer, as the outermost layer, utilizes its excellent dielectric properties to improve the cover plate's electrical insulation and signal transmission efficiency. The subsequent strontium titanate layer further enhances the dielectric properties and optimizes light transmittance, enabling the cover plate to maintain brightness and clarity while possessing stronger environmental adaptability. The introduction of the lanthanum titanate layer endows the cover plate with excellent thermal and chemical stability, effectively resisting the effects of harsh conditions such as high temperatures and corrosion. The glass substrate, as the base, provides solid support for the entire coating structure.
[0025] On the back of the cover, the innovative design of the thermochromic ink screen printing layer not only adds fun and interactivity to the product but also enhances its aesthetics through diverse patterns and colors. The combination of the neodymium oxide layer and the polyester resin layer forms a robust inner protective system, effectively preventing scratches on the ink layer and ensuring the long-lasting vibrancy of the pattern. This layered structure design not only achieves complementary advantages in the properties of each layer but also ensures a tight bond between the coating layers and overall performance stability through precise process control, providing an ideal cover solution for high-end electronic products. Attached Figure Description
[0026] 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.
[0027] Figure 1 This is a schematic diagram of the stacked structure of a composite functional glass substrate coating structure proposed in an embodiment of the present invention;
[0028] Figure 2 This is a schematic diagram of the laminated structure of the glass substrate proposed in an embodiment of the present invention.
[0029] Explanation of reference numerals in the attached figures: Europium titanate coating layer 1; Strontium titanate coating layer 2; Lanthanum titanate coating layer 3; Glass substrate 4; Polyethylene difluoroethylene trifluoroethylene layer 41; ITO layer 42; Thermochromic ink layer 5; Neodymium oxide layer 6; Polyester resin layer 7; Functional surface treatment layer 8. Detailed Implementation
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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.
[0034] It should be noted that "multiple" as mentioned in this article refers to two or more.
[0035] Example
[0036] like Figure 1 As shown, this example illustrates a composite functional glass substrate 4 coating structure, which comprises the following layers from the front to the back:
[0037] Europium titanate coating layer 1 (EuTiO3), as the outermost optical functional layer, can improve dielectric properties.
[0038] Strontium titanate coating layer 2 (SrTiO3) is deposited below europium titanate layer to further improve dielectric properties, increase light transmittance, and enhance the overall performance of cover plate.
[0039] Lanthanum titanate coating layer 3 (LaTiO3) covers the strontium titanate layer. Lanthanum titanate has good thermal and chemical stability, which helps to improve the high temperature resistance and corrosion resistance of the cover plate.
[0040] Glass substrate 4 serves as the supporting substrate for the multilayer coating structure. For example... Figure 2 As shown, a poly(VDF-TrFE) layer 41 and an ITO layer 42 are stacked on the lower surface of the glass substrate 4. The thickness of the poly(VDF-TrFE) layer 41 is 8-12 micrometers; the thickness of the ITO layer 42 is between 40 nanometers and 60 nanometers. This allows the entire cover plate to be manufactured into a touch screen with touch sensing function.
[0041] As described above, the P(VDF-TrFE) layer, as a piezoelectric material, can convert mechanical pressure applied to its surface into a change in electrical charge. This property enables its use in touch detection.
[0042] The ITO layer 42, as a transparent conductive material, can form electrodes to detect charge changes generated by the P(VDF-TrFE) layer. The transparency of ITO ensures that the visual effect of the touchscreen is not affected. By arranging the P(VDF-TrFE) and ITO layers 42 at different locations on the screen, the touchscreen can detect multiple touch points simultaneously, thus supporting multi-touch and complex gesture recognition.
[0043] The combination of P(VDF-TrFE) and ITO layer 42 has good durability and stability, and can maintain good touch detection performance even after long-term use.
[0044] The P(VDF-TrFE) material has waterproof properties, which allows the touchscreen to function normally even when it is wet or has water droplets on it.
[0045] Because P(VDF-TrFE) materials do not require a continuous power supply to detect touch, they help reduce the power consumption of touchscreens, making devices more energy-efficient. Overall, touchscreens with this structure offer good touch detection performance, transparency, durability, and energy efficiency, making them suitable for a wide range of touchscreen applications.
[0046] Thermochromic ink layer 5 is applied to the border area on the back of the glass substrate layer. It changes color according to temperature, increasing the product's fun and interactivity. Furthermore, the screen printing process is flexible, allowing for the design of diverse patterns and colors, enhancing the product's aesthetics.
[0047] The neodymium oxide layer 6 is tightly bonded to the underside of the thermochromic ink layer 5. It has high light transmittance and also enhances the hardness of the glass surface, protecting the underlying polyester resin layer 7 from scratches.
[0048] The polyester resin layer 7 serves as a protective encapsulation layer on the back side. Polyester resin has good flexibility and adhesion, which can effectively prevent the ink layer and neodymium oxide layer 6 from being scratched, while also providing a certain buffering effect to protect the integrity of the entire coating structure.
[0049] Among them, europium titanate layer, strontium titanate layer and lanthanum titanate layer form a positive gradient dielectric structure, whose dielectric constant decreases from the outside to the inside, and the difference in dielectric constant between adjacent layers is controlled within the range of 5-15%; neodymium oxide layer 6 and polyester resin layer 7 form a reverse stress compensation structure, and the tensile stress of polyester resin layer 7 is 50-150 MPa.
[0050] Preferably, the europium titanate layer has a thickness of 50-100 nanometers and is prepared by magnetron sputtering; the strontium titanate layer has a thickness of 30-50 nanometers and a grain size of 20-50 nm; and the lanthanum titanate layer has a thickness of 20-30 nanometers.
[0051] Preferably, the thermochromic ink layer 5 includes thermochromic microcapsules with a particle size distribution of 5-20 μm; a UV-curable resin matrix with a refractive index of 1.48-1.52; and a nano-silica dispersant with a particle size of 10-30 nm.
[0052] Preferably, the ink layer is formed by screen printing with a mesh count of 250-400.
[0053] Preferably, the neodymium oxide layer 6 is prepared by atomic layer deposition.
[0054] Preferably, a transition layer is provided between the lanthanum titanate layer and the glass substrate layer. The transition layer is a composite layer of SiO2 and TiO2, wherein: the thickness of the SiO2 layer is 5-15 nm; the surface roughness Ra of the transition layer is ≤1 nm, and the bonding strength with the glass substrate is ≥30 MPa. This improves the bonding strength.
[0055] Preferably, the resin layer is formed by a slot coating process, and after curing, the pencil hardness reaches 3H or higher, and the light transmittance loss is less than 2%.
[0056] Preferably, a functional surface treatment layer 8 is further provided on the surface of the europium titanate layer, including:
[0057] Superhydrophobic coating: contact angle ≥150°, sliding angle ≤5°, thickness 5-10nm;
[0058] Antistatic layer: Surface resistivity 1×10 6 -1×10 8 Ω / sq, transmittance is affected by less than 0.5%.
[0059] Preferably, the optical performance of the coated structure meets the following requirements: average transmittance in the visible light band ≥92%, haze ≤0.3%. This achieves system integration of optical, electrical, mechanical, and interactive functions.
[0060] Preferably, the glass substrate 4 is a substrate that has undergone plasma activation treatment with a mixture of hydrofluoric acid and deionized water.
[0061] This patent, through multi-layer structure innovation, material modification, interface strengthening and process breakthrough, forms a glass substrate product 4 with high dielectric, high light transmittance, strong weather resistance and intelligent interactive characteristics.
[0062] 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 composite functional glass substrate coating structure, characterized in that, The glass substrate comprises the following layers from the front to the back: Europium titanate coating layer, serving as the outermost optical functional layer; A strontium titanate coating layer is deposited beneath the europium titanate layer; A lanthanum titanate coating layer covers the strontium titanate layer; A glass substrate serves as the supporting substrate for a multilayer coating structure. A polyvinyl difluoroethylene (PVC) and a polytetrafluoroethylene (ITO) layer are stacked on the lower surface of the viewing area of the glass substrate. The PVC and ITO layer has a thickness of 8-12 micrometers, and the ITO layer has a thickness of 40 nanometers to 60 nanometers. A thermochromic ink layer is disposed on the border area on the back of the glass substrate layer; The neodymium oxide layer is closely adhered to the underside of the thermochromic ink layer; A polyester resin layer serves as a protective encapsulation layer on the back side. The europium titanate layer, strontium titanate layer, and lanthanum titanate layer form a positive gradient dielectric structure, with their dielectric constants decreasing sequentially from the outside to the inside, and the difference in dielectric constant between adjacent layers controlled within the range of 5-15%. The neodymium oxide layer and the polyester resin layer form a reverse stress compensation structure, and the tensile stress of the polyester resin layer is 50-150 MPa.
2. The composite functional glass substrate coating structure according to claim 1, characterized in that, The europium titanate layer has a thickness of 50-100 nanometers and is prepared by magnetron sputtering; the strontium titanate layer has a thickness of 30-50 nanometers and a grain size of 20-50 nm; the lanthanum titanate layer has a thickness of 20-30 nanometers.
3. The composite functional glass substrate coating structure according to claim 1, characterized in that, The thermochromic ink layer includes thermochromic microcapsules with a particle size distribution of 5-20 μm; a UV-curable resin matrix with a refractive index of 1.48-1.52; and a nano-silica dispersant with a particle size of 10-30 nm.
4. The composite functional glass substrate coating structure according to claim 3, characterized in that, The ink layer is formed by screen printing, with a mesh count of 250-400.
5. The composite functional glass substrate coating structure according to claim 1, characterized in that, The neodymium oxide layer was prepared using atomic layer deposition.
6. The composite functional glass substrate coating structure according to claim 1, characterized in that, A transition layer is provided between the lanthanum titanate layer and the glass substrate layer. The transition layer is a composite layer of SiO2 and TiO2, wherein the thickness of the SiO2 layer is 5-15 nm; the surface roughness Ra of the transition layer is ≤1 nm, and the bonding strength with the glass substrate is ≥30 MPa.
7. The composite functional glass substrate coating structure according to claim 1, characterized in that, The resin layer is formed by a slot coating process, and after curing, the pencil hardness reaches 3H or higher, and the light transmittance loss is less than 2%.
8. The composite functional glass substrate coating structure according to claim 1, characterized in that, A functional surface treatment layer is further provided on the surface of the europium titanate layer, including: Superhydrophobic coating: contact angle ≥150°, sliding angle ≤5°, thickness 5-10nm; Antistatic layer: Surface resistivity 1×10 6 ~1×10 8 Ω / sq, transmittance is affected by less than 0.5%.
9. The composite functional glass substrate coating structure according to claim 1, characterized in that, The optical performance of the coating structure meets the following requirements: average transmittance in the visible light band ≥ 92%, haze ≤ 0.3%.
10. The composite functional glass substrate coating structure according to any one of claims 1-9, characterized in that, The glass substrate is a substrate that has undergone plasma activation treatment with a mixture of hydrofluoric acid and deionized water.