Electrochromic mirror

• US 6,535,322 B2
• Filed: 12/27/2000
• Issued: 03/18/2003
• Est. Priority Date: 12/28/1999
• Status: Expired due to Fees

• Current Assignee: Nippon Mitsubishi Oil Corporation (ENEOS Holdings, Inc.)
• Original Assignee: Nippon Mitsubishi Oil Corporation (ENEOS Holdings, Inc.)
• Inventors: Ikai, Keizo, Asano, Tsuyoshi, Nishikitani, Yoshinori
• Primary Examiner(s): Epps, Georgia
• Assistant Examiner(s): O'NEILL, GARY WILLIAM
• Application Number:
  US09/749,016
• Publication Number:
  US 20010008458A1
• Time in Patent Office: 811 Days
• Field of Search: 359/265, 359/266, 359/267, 359/270, 359/272, 359/273, 359/274, 359/275
• US Class Current: 359/269
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: G02F 1/1533 structural features not otherwise provided for
• CPC Class Codes: G02F 1/155 Electrodes

Abstract

An electrochromic mirror includes a transparent conductive substrate, a reflective conductive substrate, and an ion conductive layer disposed between the transparent conductive substrate and reflective conductive substrate. A highly conductive layer is provided on a conductive surface of at least one of the conductive substrates on a portion of the surface near its peripheral edge. The highly conductive layer has a smaller resistance than the surface resistance of the conductive surface upon which it is disposed.

Claims

1. An electrochromic mirror comprising:

(a) a transparent conductive substrate having a periphery and a first conductive surface;

(b) a reflective conductive substrate having a periphery and a second conductive surface;

(c) an ion conductive layer disposed between the transparent conductive substrate and the reflective conductive substrate;

a highly conductive layer provided on at least one of a peripheral portion of the first and second conductive surfaces, the highly conductive layer having a surface resistance lower than a surface resistance of the conductive surface upon which it is disposed,

wherein the transparent conductive substrate and the reflective conductive substrate are joined at their respective peripheries with a sealant containing 0.01 to 10 percent by mass of beads having an average particle size of 20 to 200 μ

m, such that the highly conductive layer is separated from the ion conductive layer.

2. The electrochromic mirror according to claim 1, wherein the transparent conductive substrate has at least one end surface, and the highly conductive layer is provided on the end surface of the transparent conductive substrate.

3. The electrochromic mirror according to claim 1, wherein the reflective conductive substrate has at least one end surface, and the highly conductive layer is provided on the end surface of the reflective conductive surface.

4. The electrochromic mirror according to claim 1, wherein the highly conductive layer is provided on the peripheral portion of the first conductive surface.

5. The electrochromic mirror according to claim 1, wherein the highly conductive layer is provided on at least one of the peripheral portion of the first conductive surface proximate its peripheral edge and the peripheral portion of the second conductive proximate its peripheral edge.

6. The electrochromic mirror according to claim 1, wherein the highly conductive layer is provided on the peripheral portion of the first conductive surface adjacent its peripheral edge.

7. The electrochromic mirror according to claim 1, wherein the highly conductive layer is provided on the peripheral portion of the second conductive surface adjacent its peripheral edge.

8. The electrochromic mirror according to claim 1, wherein the ion conductive layer contains an electrochromic compound.

9. The electrochromic mirror according to claim 1, wherein the surface resistance of the highly conductive layer is no more than one-half of the surface resistance of the conductive surface upon which it is disposed.

10. The electrochromic mirror according to claim 1, wherein the surface resistance of said highly conductive layer is no more than one-tenth of the surface resistance of the conductive surface upon which it is disposed.

11. The electrochromic mirror according to claim 1, wherein a surface resistance of the transparent conductive substrate is different from a surface resistance of the reflective conductive substrate, and the surface resistance of one of the conductive substrates is at least two times the surface resistance of the other conductive substrate.

12. The electrochromic mirror according to claim 11, wherein the highly conductive layer is formed on the substrate having the greater surface resistance.

13. The electrochromic mirror according to claim 1, wherein the highly conductive layer has a width of 0.1 mm to 20 mm.