Variable light transmission device containing ferrous ammonium s

Details Variable light transmission device containing ferrous ammonium s Variable light transmission device containing ferrous ammonium s

1974-03-15

1976-01-06

McGraw, Vincent P.

350160, G02F 136

Patent

active

039307174

ABSTRACT:
A device for the control of light transmission or reflection comprises one or more working electrodes, preferably arranged to form a display and having radiation transmission or reflection properties, an active material comprising an N(p-cyanophenyl) substituted derivative of a compound, usually bicyclic, having two conjugated nitrogen-containing rings in contact with the working electrode surface, a counter electrode, also in contact with the active material and ferrous ammonium sulphate as an auxiliary redox system.

REFERENCES:
patent: 3712709 (1973-01-01), Kenworthy
patent: 3839857 (1974-10-01), Berets et al.

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