Method of driving electrochromic display device and electrochrom

Details Method of driving electrochromic display device and electrochrom Method of driving electrochromic display device and electrochrom

1979-12-11

1982-03-30

Davie, James W.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340785, G02F 117

Patent

active

043221335

ABSTRACT:
A method of driving an electrochromic display device and the electrochromic display device therefor the latter including an electrochromic display cell having two opposed substrates at least one of which is transparent, a plurality of electrodes respectively applied to the opposed substrates and an electrochromic substance held in contact with said plurality of electrodes between said opposed substrates so as to reversibly vary its light absorbing characteristics by an electric current applied to the electrodes, and a driving circuit coupled to the electrochromic display cell for driving the latter, wherein erasing the display of the electrochromic cell is done in such a manner that the erasing current will be stopped eventually by the electrochromic substance itself in order to secure complete erasure.

REFERENCES:
patent: 3839857 (1974-10-01), Berets et al.
patent: 3950936 (1976-04-01), Oguey et al.
Giglia, "Features of an Electrochromic Display Device", American Cyanamid Co., pp. 1-13, May 1976.

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