Solid type electrochromic glare-proof mirror

• US 20040051931A1
• Filed: 10/23/2003
• Published: 03/18/2004
• Est. Priority Date: 10/10/2001
• Status: Active Grant

• Current Assignee: Murakami Corporation
• Original Assignee: Murakami Corporation
• Inventors: Mochizuka, Takuo, Minami, Chihiro
• Granted Patent: US 6,825,965 B2
• Time in Patent Office: Days
• US Class Current: 359/265
• CPC Class Codes: G02F 1/161 Gaskets; Spacers; Sealing of cells; Filling or closing of cells

Abstract

The present invention is characterized by, for example as shown in FIG. 1, using a resin 8 containing prescribed filler which can minimize a change in moisture content in an electrochromic film as a sealing resin, and further by sealing the outer circumference by a silyl-containing polymer 9.

Here, by the use of the epoxy resin 8 containing the prescribed filler, which can minimize a change in moisture content in an electrochromic film, the moisture content in the electrochromic layer can be stabilized to a level near the use of the sealing glass relative to the environmental changes such as a high temperature and a high humidity. Consequently, there is an extremely high possibility to avoid the use of the sealing glass in comparison with the use of the conventional resin. However, in order to secure resistance to an elevated temperature and resistance to a high humidity on a practically satisfied level, the outer circumference 9 is required to be further sealed by a silyl-containing polymer 9.

Claims

1. A solid type electrochromic antiglare mirror comprising a transparent glass substrate having a transparent conductive film;

a solid type electrochromic layer composed of an electrolyte film and a coloring film which colors due to an oxidation or reduction; and

a film serving as an electrode and reflecting film formed on the back surface thereof on this order,

said electrochromic layer and said film serving as an electrode and reflecting film being totally covered with, sealed by and protected by a resin containing a filler, whose density of the resin film is not less than 1.5 g/cm³, from their back surface sides including their back and side surfaces.

2. The solid type electrochromic antiglare mirror as claimed in claim 1, wherein the filer content in said resin containing the filler is not less than 50% by weight.

3. The solid type electrochromic antiglare mirror as claimed in claim 1 or 2, wherein the diameter of the filer of said resin containing the filler is not more than 100 μ

m.

4. The solid type electrochromic antiglare mirror as claimed in any one of claims 1 to 3, wherein the thickness of the filer of said resin containing the filler is from 1 μ

m to 1 mm.

5. The solid type electrochromic antiglare mirror as claimed in any one of claims 1 to 4, wherein a base resin for said resin containing filler is one resin selected from among epoxy resins, urethane resins, silicone resins, polysulfide resins, acrylic resins, and fluorine resins.

6. The solid type electrochromic antiglare mirror as claimed in any one of claims 1 to 4, wherein said resin containing the filler is available from Matsushita Electric Work Ltd. under trade name of CV5423F1.

7. The solid type electrochromic antiglare mirror as claimed in any one of claims 1 to 6, wherein at least the outer circumference (side portion) of the mirror from the substrate glass to the film of the resin containing the filler is sealed by a silyl-containing polymer.

8. The solid type electrochromic antiglare mirror as claimed in claim 7, wherein a part of the back surface of the resin containing the filler and/or a part of the surface of the substrate glass is sealed by the silyl-containing polymer in addition to the outer circumference of the mirror, the polymer also serving as a cushioning material.

9. The solid type electrochromic antiglare mirror as claimed in claim 7 or 8, wherein the coat of said silyl-containing polymer has a thickness from 0.1 mm to 3.0 mm.

10. The solid type electrochromic antiglare mirror as claimed in any one of claims 6 to 9, wherein said silyl-containing polymer is available from Three Bond Co., under the trade name of 1530.

11. The solid type electrochromic antiglare mirror as claimed in any one of claims 1 to 10, wherein said electrochromic layer is composed of a lamination of an oxidative chromic film, an electrolyte film, and a reductive chromic film on this order.

12. The solid type electrochromic antiglare mirror as claimed in claim 11, wherein said electrochromic layer comprises a lamination of an Ir oxide film serving as the oxidative chromic film, a Ta₂O₅ film serving as electrolyte film and a WO₃ film serving as the reductive chromic film on this order.

13. The solid type electrochromic antiglare mirror as claimed in any one of claims 1 to 12, which is constructed as an automobile exterior mirror or interior mirror.