Method and apparatus for forming visible images

Details Method and apparatus for forming visible images Method and apparatus for forming visible images

1977-04-04

1979-11-27

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

041758366

ABSTRACT:
A method and apparatus for causing coloration of an electrochromic material includes passing through the material an electrical pulse above a coloration threshold potential for the material and of a predetermined polarity and subsequently applying a D. C. potential of the same polarity to the material of a magnitude less than the threshold potential.

REFERENCES:
patent: 3864589 (1975-02-01), Schoot et al.
patent: 3950936 (1976-04-01), Oguey et al.
patent: 3987433 (1976-10-01), Kennedy
patent: 4041481 (1977-08-01), Sato

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