Hydrophobic EC outside rear-view mirror

Abstract

The hydrophobic EC outside rear-view mirror comprises hydrophobic surface layer glass, the surface layer glass comprises a lens base body, the surface of the lens base body is provided with a layer of hydrophobic film capable of enabling the water drop angle to be larger than or equal to 110 degrees, and the hydrophobic film is made of titanium oxide and titanium fluoride composite target materials or silicon carbide target materials. The rearview mirror has the advantages that the hydrophobic film made of the titanium oxide and titanium fluoride composite target material or the silicon carbide target material is good in corrosion resistance, the abrasion resistance and the scraping resistance of the glass surface can be improved, the service life of the surface glass is effectively prolonged, and therefore the service life of the rearview mirror is prolonged; an efficient hydrophobic layer can be formed, water and stains are prevented from being accumulated on the surface of the screen, meanwhile, the hydrophobic film is good in hydrophobic effect, the water drop angle is larger than or equal to 110 degrees, and the effect that water drops are not accumulated can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of automotive rearview mirror technology, and more particularly to a hydrophobic EC exterior rearview mirror. Background Technology

[0002] A Chinese invention patent application (CN202411293801.1) entitled "An Environmentally Friendly AF Film and Its Preparation Method" discloses an environmentally friendly AF film and its preparation method. This invention involves mixing chitosan and glycerol to obtain solution A, mixing tea polyphenols and citric acid to obtain solution B, and mixing solutions A and B to obtain a tea polyphenol-chitosan film. Polylactic acid and ethylenediamine are reacted to obtain aminated polylactic acid, which is then introduced with isocyanate groups and reacted with the tea polyphenol-chitosan film to obtain an environmentally friendly film. An adhesive is applied to the surface of the substrate film, then the environmentally friendly film layer is attached, followed by the deposition of an AF layer and drying. This process yields the environmentally friendly AF film. This invention exhibits good biodegradability and environmental performance. However, this hydrophobic film has poor corrosion resistance and a short service life when applied to automotive rearview mirrors. Therefore, the structure of this hydrophobic film needs further improvement. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a corrosion-resistant, long-service-life hydrophobic EC exterior rearview mirror in light of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: This hydrophobic EC exterior rearview mirror includes a hydrophobic surface glass, characterized in that: the surface glass includes a lens substrate, and a hydrophobic film capable of making the water droplet angle greater than or equal to 110° is provided on the surface of the lens substrate, and the hydrophobic film is made of a titanium oxide and titanium fluoride composite target or a silicon carbide target.

[0005] As an improvement, a conductive film may preferably be provided on the back side of the surface glass.

[0006] In a further improvement, the conductive film may preferably be an ITO film.

[0007] Further improvements are made to ensure that the visible light transmittance of the surface glass, which is composited with a hydrophobic film and a conductive film, is preferably greater than or equal to 70%.

[0008] As an improvement, the lens substrate may preferably be curved glass.

[0009] In a further improvement, the outer glass can preferably be connected to the inner glass via an annular sealant to form an integral lens, and an electrochromic liquid is filled in the integral lens cavity formed by the outer glass, inner glass, and sealant.

[0010] In a further improvement, the surface of the inner glass may preferably be provided with a reflective film, and a second conductive film may be provided on the surface of the reflective film.

[0011] In a further improvement, the second conductive film may preferably be an ITO film.

[0012] As a further improvement, the curvature of the inner glass layer can preferably be the same as that of the outer glass layer.

[0013] In a further improvement, electrodes can preferably be provided at the upper and lower ends of the overall lens, and the electrodes are connected to the vehicle's control circuit board and vehicle power supply through circuits.

[0014] Compared with the prior art, the advantages of this utility model are as follows: the hydrophobic film made of titanium oxide and titanium fluoride composite target or silicon carbide target has good corrosion resistance, which can improve the wear resistance and scratch resistance of the glass surface, effectively extend the life of the surface glass, and thus extend the service life of the rearview mirror; it can also form a highly efficient hydrophobic layer to prevent the accumulation of water and stains on the screen surface. At the same time, the hydrophobic film has a good hydrophobic effect, with a water droplet angle greater than or equal to 110°, which can achieve the effect of preventing water droplets from gathering. Attached Figure Description

[0015] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 Structural diagram;

[0017] Figure 3 yes Figure 2 A schematic diagram of the structure of the middle layer glass. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 3As shown, the hydrophobic EC exterior rearview mirror of this embodiment includes a hydrophobic surface glass 1. The surface glass 1 includes a lens substrate 10. A hydrophobic film 11, capable of creating a water droplet angle greater than or equal to 110°, is disposed on the surface of the lens substrate 10. The hydrophobic film 11 is made of a titanium oxide and titanium fluoride composite target or a silicon carbide target. Titanium oxide and titanium fluoride composite targets or silicon carbide targets are existing materials, and this is an application of existing materials. Because the crystal planes of silicon carbide do not have hydrogen atoms, its surface energy is large, resulting in strong hydrophobicity. Using hydrophobic surface treatment technologies, such as hydrophobic coatings, self-assembled monolayers, plasma etching, and laser treatment, the hydrophobicity of the silicon carbide surface can be greatly improved, thereby achieving some special applications, such as water droplet bouncing, self-cleaning, and corrosion resistance. A conductive film 12 is disposed on the back of the surface glass 1. The conductive film 12 is an ITO film. The visible light transmittance of the surface glass 1, which is composited with a hydrophobic film 11 and a conductive film 12, is greater than or equal to 70%.

[0020] The lens substrate 10 is curved glass. The outer glass 1 is connected to the inner glass 2 via an annular sealant 3 to form a single lens. An electrochromic liquid 4 fills the cavity of the single lens formed by the outer glass 1, inner glass 2, and sealant 3. A reflective film 21 is disposed on the surface of the inner glass 2, and a second conductive film 22 is disposed on the surface of the reflective film 21. The second conductive film 22 is an ITO film. The curvature of the inner glass 2 is the same as that of the outer glass 1. Electrodes 5 are respectively disposed at the upper and lower ends of the single lens. The electrodes 5 are connected to the vehicle's control circuit board and on-board power supply via circuits. The specific structure of the control circuit board and on-board power supply is known technology and will not be described in detail.

Claims

1. A hydrophobic EC exterior rearview mirror, comprising a hydrophobic surface glass (1), characterized in that: The surface glass (1) includes a lens substrate (10), and a hydrophobic film (11) is provided on the surface of the lens substrate (10) to make the water droplet angle greater than or equal to 110°. The hydrophobic film (11) is made of silicon carbide target material.

2. The hydrophobic EC exterior rearview mirror according to claim 1, characterized in that: A conductive film (12) is provided on the back side of the surface glass (1).

3. The hydrophobic EC exterior rearview mirror according to claim 2, characterized in that: The conductive film (12) is an ITO film.

4. The hydrophobic EC exterior rearview mirror according to claim 3, characterized in that: The visible light transmittance of the surface glass (1) which is composed of a hydrophobic film (11) and a conductive film (12) is greater than or equal to 70%.

5. The hydrophobic EC exterior rearview mirror according to any one of claims 1 to 4, characterized in that: The lens substrate (10) is curved glass.

6. The hydrophobic EC exterior rearview mirror according to claim 5, characterized in that: The outer glass (1) is connected to the inner glass (2) by an annular sealant (3) to form an integral lens. The integral lens cavity formed by the outer glass (1), the inner glass (2), and the sealant (3) is filled with an electrochromic liquid (4).

7. The hydrophobic EC exterior rearview mirror according to claim 6, characterized in that: The inner glass (2) has a reflective film (21) on its surface, and a second conductive film (22) is provided on the surface of the reflective film (21).

8. The hydrophobic EC exterior rearview mirror according to claim 7, characterized in that: The second conductive film (22) is an ITO film.

9. The hydrophobic EC exterior rearview mirror according to claim 6, characterized in that: The curvature of the inner glass (2) is the same as that of the outer glass (1).

10. The hydrophobic EC exterior rearview mirror according to claim 6, characterized in that: Electrodes (5) are respectively provided at the upper and lower ends of the overall lens, and the electrodes (5) are connected to the vehicle's control circuit board and vehicle power supply through circuits.

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