Electrochromic display device

Details Electrochromic display device Electrochromic display device

1980-10-15

1982-07-20

McCamish, Marion

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

350330, 204280, C09K 334, G02F 113

Patent

active

043406246

ABSTRACT:
An electrochromic display device comprising a pair of electrodes which are disposed with a specified space therebetween, at least one of the electrodes being transparent, and a non-aqueous electrolytic solution filled in the space and comprised of a styryl-like compound and a supporting electrolyte dissolved in a solvent, the styryl-like compound being represented by the formula: ##STR1## in which Q represents a benzene ring with or without substituents and/or a condensed ring, R.sub.1 and R.sub.2 independently represent a lower alkyl group, a hydroxyalkyl group or an alkoxyalkyl group, R.sub.3 represents hydrogen, an alkyl group, an alkoxy group, a halogen, a nitrile group, an aromatic group or a phenoxy group, Y represents oxygen or sulfur, Z represents an alkylene group of 2 to 4 carbon atoms, with or without an alkyl substituent, required to complete a ring structure together with ##STR2## and A represents a residue resulting from a condensation reaction of the methyl group of methylene group in the 2-position of a precursor indoline derivative of the formula: ##STR3## where Q, R.sub.1, R.sub.2, R.sub.3, Y and Z have the same meanings as defined above with a member selected from the group consisting of aromatic aldehydes, heterocyclic aldehydes, aromatic nitroso compounds and heterocyclic nitroso compounds.

REFERENCES:
patent: 4003633 (1977-01-01), Yamashita

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