Color display device

Details Color display device Color display device

1975-11-19

1977-01-18

Padgett, Benjamin R.

Compositions

Radioactive compositions

Nuclear reactor fuel

252299, G02F 113, C09K 334

Patent

active

040036332

ABSTRACT:
This invention relates to a novel color display device comprising a pair of electrodes, which are disposed with a specified space inbetween and at least one of which is transparent, and a liquid crystal solution filled in the space, wherein the improvement is that the liquid crystal solution contains a specified small amount of a new styryl-like color-changing compound represented by the chemical formula: ##STR1## In the chemical formula; Q represents a benzene ring with or without substituted radicals and/or condensed ring(s); R.sub.1 and R.sub.2 represent lower alkyl radicals, hydroxyalkyl radicals or alkoxyalkyl radicals of the same or different kind; R.sub.3 represents hydrogen, an alkyl radical, alkoxy radical, halogen, a nitrile radical, an aromatic radical or a phenoxy radical; Y represents oxygen (O) or sulfur (S); Z represents an alkylene radical of 2 to 4 carbon atoms with or without alkyl substitution radical(s), necessary to form a ring structure together with ##STR2## A represents a condensation reaction residue of an aromatic aldehyde, heterocyclic aldehyde, aromatic nitroso compound, or heterocyclic nitroso compound.

REFERENCES:
patent: 3597044 (1971-08-01), Castellano
patent: 3703329 (1972-11-01), Castellano
patent: 3833287 (1974-09-01), Taylor et al.
patent: 3864022 (1975-02-01), Moriyama et al.
patent: 3865469 (1975-02-01), Asai et al.
patent: 3876286 (1975-04-01), Deutscher et al.
patent: 3888566 (1975-06-01), Toriyama et al.
patent: 3900248 (1975-08-01), Nagasaki
Ohnishi, Y., et al., Appl. Phys. Letts., vol. 24, No. 5, pp. 213-216 (3/74).

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