Erasable visual image display device

Details Erasable visual image display device Erasable visual image display device

G - Physics

02

F

345/10

G02F 1/00 (2006.01) C09K 9/02 (2006.01) G02F 1/15 (2006.01)

Patent

CA 1075799

ERASABLE VISUAL IMAGE DISPLAY DEVICE ABSTRACT OF THE DISCLOSURE 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, l-phenyl-3 diethylaminostyrl -5-diethylaminophenyl .DELTA.2 pyrazoline.

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