Electrochromic device

• US 20030161025A1
• Filed: 02/27/2003
• Published: 08/28/2003
• Est. Priority Date: 09/01/2000
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Honda Lock
• Original Assignee: Nippon Oil Corporation (ENEOS Holdings, Inc.)
• Inventors: Asano, Tsuyoshi, Ikai, Keizo, Nishikitani, Yoshinori
• Granted Patent: US 6,867,894 B2
• Time in Patent Office: Days
• US Class Current: 359/264
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: G02F 1/161 Gaskets; Spacers; Sealing of cells; Filling or closing of cells

Abstract

A conventional electrochromic mirror comprises an ion conductive layer provided between a transparent electrically conductive substrate and a reflective electrically conductive substrate and containing spacers. The spacers can be perceived when the mirror was viewed. According to the present invention, the difference in refraction index between the spacers and the ion conductive layer is ±0.03 or less. Therefore, the electrochromic mirror having spacers in the ion conductive layer which are hardly perceived can be provided.

Claims

1. An electrochromic mirror in which an ion conductive layer is arranged between a transparent electrically conductive substrate and a reflective electrically conductive substrate wherein spacers are dispersed in the ion conductive layer and the difference in refraction index between the spacers and the ion conductive layer is ±

0.03 or less.

2. The electrochromic mirror according to claim 1 wherein said ion conductive layer exhibits electrochromic properties.

3. The electrochromic mirror according to claim 1 or 2 wherein said ion conductive layer contains an electrochromic compound.

4. The electrochromic mirror according to claim 3 wherein said electrochromic compound comprises at least a cathodic electrochromic compound and an anodic electrochromic compound.

5. The electrochromic mirror according to claim 3 wherein said electrochromic compound is an organic compound having a structure with cathodic electrochromic properties and a structure with anodic electrochromic properties in combination.