Erasable visual image display device

Details Erasable visual image display device Erasable visual image display device

1976-05-17

1977-07-05

Sikes, William L.

G02F 136

Patent

active

040336735

ABSTRACT:
An erasable visual image display device contains a pair of conductive electrodes in spaced relationship. One electrode has a cation permselective membrane thereon and the other electrode has an anion permselective membrane thereon. Positioned between the two membranes is a recording medium having the properties of being both photoionizable and capable of electrochemically producing colored species. The medium contains an electrochemically reversible acceptor molecule, for example, 1, 2, 4, 5 tetracyanobenzene and an electrochemically reversible donor molecule, for example, 1-phenyl-3 diethylaminostyrl 5-diethylaminophenyl .DELTA..sup.2 pyrazoline.

REFERENCES:
patent: 3453038 (1969-07-01), Kissa et al.
patent: 3589896 (1971-06-01), Wilcox
patent: 3840288 (1974-10-01), Schnatterly
patent: 3986771 (1976-10-01), Tsukada

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