Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

1977-09-21

1979-11-06

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

3403782, 350331, G09F 932, G02F 113

Patent

active

041737571

ABSTRACT:
This invention provides a nematic liquid crystal display device for displaying a first information in the absence of any control voltage and substituting for that another information, or successively several other informations, by application of a control voltage. Several embodiments are described, in which either rotatory polarization effect in twisted structures or dynamic scattering effect are used.

REFERENCES:
patent: 3718380 (1973-02-01), Wysocki et al.
patent: 4037927 (1977-07-01), Krueger
patent: 4068925 (1978-01-01), Tani et al.

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