Liquid crystal display devices

Details Liquid crystal display devices Liquid crystal display devices

1975-10-17

1977-06-28

Corbin, John K.

Compositions

Radioactive compositions

Nuclear reactor fuel

252299, G02F 116, C09K 334

Patent

active

040322190

ABSTRACT:
A liquid crystal guest-host display device includes a dye dissolved in the liquid crystal material. The invention is characterized in that the dye comprises three colored dye compounds mixed together to provide gray in the absence of an applied electric field. The compounds may be Sudan Black, Sudan Red and .beta.-carotene. The liquid crystal material preferably includes at least one 4'-alkyl- or -alkoxy-4'-cyanobiphenyl compound.

REFERENCES:
patent: 3833287 (1974-09-01), Taylor et al.
patent: 3864022 (1975-02-01), Moriyama et al.

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