Electrochromic display device

Details Electrochromic display device Electrochromic display device

1980-04-10

1982-05-25

Davie, James W.

G02F 117

Patent

active

043313850

ABSTRACT:
The invention relates to an electrochromic display device (referred to as ECD hereinafter) which is stably workable for a long period and shows a long cycle life. The ECD of the invention has its feature in using a counter electrode which comprises a collector composed of a valve effect having metal such as titanium, tantalum, aluminum and the like, the metal being hardly soluble in an electrolyte, and an active material on the said collector and electrically connected to the said collector, the active material being selected from reductant of tungsten oxide, iron berlinate and the like and being able to carry out a reversible oxidation reaction at a lower potential than that at which the collector carries out an oxidation reaction.

REFERENCES:
patent: 3708220 (1973-01-01), Meyers et al.
patent: 3973829 (1976-08-01), Giglia
patent: 3978007 (1976-08-01), Giglia et al.
patent: 4088395 (1978-05-01), Giglia

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