Electrochromic anti-dazzle mirror glass

Abstract

The utility model belongs to the technical field of vacuum magnetron sputtering coated glass, and particularly discloses electrochromic anti-dazzle mirror glass, which is used for solving the problem that the anti-dazzle mirror glass adopting a silver film as a reflecting film is poor in stability. Comprising an outer glass substrate and an inner glass substrate, the outer glass substrate comprises a first surface and a second surface which are opposite to each other, the inner glass substrate comprises a third surface and a fourth surface which are opposite to each other, the second surface and the third surface are respectively provided with an ITO transparent conductive film layer, and the fourth surface is provided with a reflecting film; the reflecting film has five layers and is formed by alternately plating Nb2O5 and SiO2; an electrochromic layer is arranged between the ITO transparent conductive film layers of the inner glass substrate and the outer glass substrate, and the upper end of the outer glass substrate and the lower end of the inner glass substrate are respectively provided with a metal electrode. The anti-dazzle glass has the advantages of anti-dazzle performance, stability, certain hardness and low cost, and the machinability is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of vacuum magnetron sputtering coated glass technology, and particularly relates to an electrochromic anti-glare mirror glass. Background Technology

[0002] Rearview mirrors are one of the most important safety components of a motor vehicle, used to observe road conditions behind the vehicle while reversing and for the driver to observe the surroundings while driving. To achieve these functions, rearview mirrors need to be made of anti-glare glass.

[0003] Currently, the reflective film of anti-glare mirror glass is generally made of silver film or precious metal alloy. Because silver film is not corrosion resistant and requires sealing protection, it can only be placed on the third surface of the anti-glare mirror as a conductive reflective film layer. Because silver film has poor stability, it has many limitations on the production cycle and service life of anti-glare mirror glass. Utility Model Content

[0004] The purpose of this invention is to provide an electrochromic anti-glare mirror glass that effectively solves the problem of poor stability of anti-glare mirror glass using silver film as the reflective film.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] An electrochromic anti-glare glass includes an outer glass substrate and an inner glass substrate. The outer glass substrate includes a first surface and a second surface that are opposite to each other. The inner glass substrate includes a third surface and a fourth surface that are opposite to each other. An ITO transparent conductive film layer is provided on both the second surface and the third surface. A reflective film is provided on the fourth surface.

[0007] The reflective film comprises, from the fourth surface outwards, a first film layer, a second film layer, a third film layer, a fourth film layer, and a fifth film layer, wherein the first film layer, the third film layer, and the fifth film layer are all made of Nb2O5, and the second film layer and the fourth film layer are all made of SiO2.

[0008] Liquid gel EC material is filled into the sealed parallel gap formed between the ITO transparent conductive film layer of the outer glass substrate and the ITO transparent conductive film layer of the inner glass substrate to serve as an electrochromic layer. A metal electrode is provided at the upper end of the outer glass substrate and the lower end of the inner glass substrate.

[0009] Furthermore, the thickness of the ITO transparent conductive film layer is 160±20nm, and the sheet resistance of the ITO transparent conductive film layer is 12~13Ω / sq.

[0010] Furthermore, both the outer glass substrate and the inner glass substrate are plain white glass sheets with a thickness of 2-3 mm.

[0011] Furthermore, the reflective film has a reflectivity of 50% to 75%.

[0012] Furthermore, the visible light transmittance T of the outer glass substrate with an ITO transparent conductive film layer is ≥86%, and the visible light reflectance R is ≤13%.

[0013] Furthermore, the thickness of the first layer of the reflective film is 119±5nm, the thickness of the second layer is 55±5nm, the thickness of the third layer is 74±5nm, the thickness of the fourth layer is 65±5nm, and the thickness of the fifth layer is 66±5nm.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are:

[0015] This invention achieves conductivity by employing an ITO transparent conductive film layer and provides anti-glare functionality by injecting liquid gel EC material between the outer and inner glass substrates. This invention ensures basic anti-glare functionality while also offering stability, a certain degree of hardness, and low cost, significantly improving its processability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Explanation of reference numerals in the attached drawings: Outer glass substrate - 1; Inner glass substrate - 2; First surface - 3; Second surface - 4; Electrochromic layer - 5; Third surface - 6; Fourth surface - 7; Metal electrode - 8; Reflective film - 9; Insulating material - 10; ITO transparent conductive film layer - 11. Detailed Implementation

[0018] Example 1: Electrochromic anti-glare mirror glass, such as Figure 1 As shown, the system includes an outer glass substrate 1 and an inner glass substrate 2. The outer glass substrate 1 includes a first surface 3 and a second surface 4 facing away from each other, and the inner glass substrate 2 includes a third surface 6 and a fourth surface 7 facing away from each other. An ITO transparent conductive film layer 11 is provided on both the second surface 4 and the third surface 6. The material of the ITO transparent conductive film layer 11 is indium tin oxide. A reflective film 9 is provided on the fourth surface 7. The reflective film 9 includes a first film layer, a second film layer, a third film layer, a fourth film layer and a fifth film layer in sequence from the fourth surface 7 outwards. The materials of the first film layer, the third film layer and the fifth film layer are all Nb2O5, and the materials of the second film layer and the fourth film layer are all SiO2.

[0019] Liquid gel EC material is filled into the sealed parallel gap (sealed with insulating material 10 around the perimeter) formed between the ITO transparent conductive film layer 11 of the outer glass substrate 1 and the ITO transparent conductive film layer 11 of the inner glass substrate 2 to serve as an electrochromic layer 5. A metal electrode 8 is provided at the upper end of the outer glass substrate 1 and the lower end of the inner glass substrate 2.

[0020] In this embodiment, the thickness of the ITO transparent conductive film layer 11 is 160±20nm, and the sheet resistance of the ITO transparent conductive film layer 11 is 12~13Ω / sq. The thickness of the first film layer of the reflective film 9 is 119±5nm, the thickness of the second film layer is 55±5nm, the thickness of the third film layer is 74±5nm, the thickness of the fourth film layer is 65±5nm, and the thickness of the fifth film layer is 66±5nm.

[0021] In this embodiment, both the outer glass substrate 1 and the inner glass substrate 2 are plain white glass sheets with a thickness of 2-3 mm, purchased from Taiwan Glass Qingdao Co., Ltd.

[0022] In this embodiment, the ITO transparent conductive film layer 11 is formed by magnetron sputtering using rotating indium tin oxide as the target material; the first, third, and fifth films of the reflective film 9 are formed by magnetron sputtering using rotating niobium oxide as the target material; and the second and fourth films of the reflective film 9 are formed by magnetron sputtering using rotating silicon oxide as the target material.

[0023] Indium tin oxide (ITO) is a metallic compound with excellent electrical conductivity. It possesses a wide bandgap, high transmittance in the visible spectrum, and low resistivity. After sputtering, it exhibits good conductivity (resistivity exceeding 10 Ω·cm), high hardness, wear resistance, and chemical corrosion resistance; good processability; high visible light transmittance (over 85%); good ultraviolet absorption (not less than 85%); good infrared reflectivity (not less than 80%); microwave attenuation (not less than 85%); low surface resistance; high transmittance; large area and light weight; easy processing and impact resistance; and heat insulation and cooling properties, including defrost removal when energized. Niobium oxide is a semiconductor material with excellent electrical conductivity. Silicon oxide is a hard, brittle, insoluble, colorless, and transparent crystal.

[0024] Electrochromic (EC) technology utilizes the stable and reversible color changes in the optical properties of materials, such as reflectivity, transmittance, and absorptivity, under the influence of an applied electric field, thereby achieving active and dynamic control over light and solar radiation. This manifests as reversible changes in color and transparency. EC glass typically consists of five thin film layers sandwiched between two substrates: a transparent conductive layer, an electrochromic layer, an electrolyte layer, an ion storage layer, and another transparent conductive layer. Its working principle involves applying a voltage to the electrodes at both ends of the electrochromic element. Under the influence of the applied electric field, ions migrate into (or out of) the electrochromic layer, causing the valence of the electrochromic material to decrease (or increase). Before reaching equilibrium, the electrochromic material undergoes a color change; once equilibrium is reached, the color change stabilizes. In this embodiment, liquid gel EC material is poured into the parallel gap formed between two glass sheets using liquid potting technology and then encapsulated to form electrochromic glass.

[0025] In this embodiment, an ITO transparent conductive film layer 11 is provided on the second surface 4 and the third surface 6 as a conductive layer, liquid gel EC material is injected between the outer glass substrate 1 and the inner glass substrate 2 as an electrochromic layer 5, and a reflective film 9 is provided on the fourth surface 7 as a reflective layer.

[0026] Unlike traditional anti-glare mirrors that have five layers of film (ITO, NiCr, Ag, NiCr, ITO) on the third surface, this embodiment simplifies the process to a single transparent conductive ITO film layer 11. While maintaining its conductivity, the silver film layer is removed, allowing this embodiment to be placed in the air for extended periods, thus greatly improving the stability of the anti-glare mirror.

[0027] In this embodiment, a reflective film 9 is provided on the fourth surface 7, preferably a reflective film with a reflectivity of 50% to 70%. While ensuring its mirror display function, by providing the reflective film 9, this embodiment is more stable than ordinary metal reflective layers and also has the function of blocking blue light. Compared with the previous polarizing mirror, it reduces costs while ensuring basic functions.

[0028] This embodiment optimizes the performance of the electrochromic anti-glare glass by rationally arranging the structure and the thickness of the film materials, and rationally allocating the functional layers. In this embodiment, the visible light transmittance T of the outer glass substrate 1 with the ITO transparent conductive film layer 11 is ≥86%, and the visible light reflectance R is ≤13%.

[0029] This invention employs an ITO transparent conductive film layer 11 to provide conductivity, and an electrochromic layer 5 between the outer glass substrate 1 and the inner glass substrate 2 to provide anti-glare functionality. This invention ensures basic anti-glare functionality while also offering stability, a certain degree of hardness, and low cost, significantly improving its processability.

[0030] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An electrochromic anti-glare mirror glass, characterized in that, The glass substrate comprises an outer glass substrate and an inner glass substrate, the outer glass substrate comprises a first surface and a second surface, the inner glass substrate comprises a third surface and a fourth surface, the second surface and the third surface are provided with an ITO transparent conductive film layer, and the fourth surface is provided with a reflective film; The reflective film comprises a first film layer, a second film layer, a third film layer, a fourth film layer and a fifth film layer from the fourth surface to the outside, the first film layer, the third film layer and the fifth film layer are made of Nb2O5, and the second film layer and the fourth film layer are made of SiO2. A sealed parallel gap is formed between the ITO transparent conductive film layer of the outer glass substrate and the ITO transparent conductive film layer of the inner glass substrate, and a liquid gel EC material is filled in the gap as an electrochromic layer, and a metal electrode is arranged at the upper end of the outer glass substrate and the lower end of the inner glass substrate.

2. Electrochromic anti-glare mirror glass according to claim 1, characterized in that The thickness of the ITO transparent conductive film layer is 160±20 nm, and the sheet resistance value of the ITO transparent conductive film layer is 12-13 Ω / sq.

3. Electrochromic anti-glare mirror glass according to claim 2, characterized in that The outer glass substrate and the inner glass substrate are both common white glass plates with a thickness of 2-3 mm.

4. Electrochromic anti-glare mirror glass according to claim 3, characterized in that The reflectivity of the reflective film is 50%-75%.

5. Electrochromic anti-glare mirror glass according to claim 4, characterized in that The visible light transmittance T of the outer glass substrate provided with the ITO transparent conductive film layer is T≥86%, and the visible light reflectivity R is R≤13%.

6. Electrochromic anti-glare mirror glass according to claim 5, characterized in that The thickness of the first film layer of the reflective film is 119±5 nm, the thickness of the second film layer is 55±5 nm, the thickness of the third film layer is 74±5 nm, the thickness of the fourth film layer is 65±5 nm, and the thickness of the fifth film layer is 66±5 nm.

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