Electrochromic mirror and electrochromic devices

Details Electrochromic mirror and electrochromic devices Electrochromic mirror and electrochromic devices

2000-01-31

2001-09-04

Epps, Georgia (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S270000, C359S268000

Reexamination Certificate

active

06285486

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to electrochromic devices such as mirrors, smart windows, displays and etc. and more particularly such an electrochromic mirror which can used as an antiglare mirror for an automobile or a decorative mirror for indoor use.
2. Prior Art
In Japanese Patent Laid-Open Publication No. 63-18336, there is disclosed an electrochromic antiglare mirror comprising a chromogenic material in the form of a film obtained by sputtering or vacuum-depositing an inorganic oxide such as tungsten oxide (WO
3
) over a transparent electrically conductive film.
However, the production of such an electrochromic mirror becomes costly because of the film forming operation requiring a process carried out under vacuum. A demand has therefore been placed on an electrochromic mirror which can be manufactured with an inexpensive material and by a simple and easy method.
SUMMARY OF THE INVENTION
It is an object of the present invention made to solve the aforementioned problems by using a specific electrically conductive high molecular compound as a chromogenic film.
According to the present invention, there is provided an electrochromic mirror comprising a reflective electrically conductive substrate, a transparent electrically conductive substrate, a layer of an ion-conductive material disposed therebetween and at least one electrochromic chromogenic layer disposed either between the ion-conductive material layer and the reflective electrically conductive substrate or between the ion-conductive material layer and the transparent electrically conductive substrate, the electrochromic chromogenic layer containing a compound having a viologen structure represented by the formula
wherein X
−
and Y
−
may be the same or different and each are a counter anion selected from the group consisting of an halogen anion, ClO
4
−
, CH
3
COO
−
and CH
3
(C
6
H
4
)SO
3
−
.
One embodiment of an electrochromic mirror according to the present invention is characterized by all components thereof being solid.


REFERENCES:
patent: 4473695 (1984-09-01), Wrighton et al.
patent: 4841058 (1989-06-01), Endo et al.
patent: 5729379 (1998-03-01), Allemand et al.
patent: 5751467 (1998-05-01), Byker
patent: 5818636 (1998-10-01), Leventis et al.
patent: 6154306 (2000-11-01), Varaprasad et al.
patent: 6203154 (2001-03-01), Kobayashi et al.
patent: 6208452 (2001-03-01), Nishikitani et al.
patent: 63-18336 (1988-01-01), None
Kirk-Othmer, Encyclopedia of Chemical Technology, Fourth Edition (1993), vol. 6, pp. 312-314 (1993).

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