Display device

Details Display device Display device

1997-01-30

1998-08-11

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349179, 349186, G02F 1133, G02F 113

Patent

active

057934517

ABSTRACT:
In a display device having a TN liquid crystal cell which can be illuminated by transmitted light from a source of light, the nematic liquid crystal substance of which cell contains a coloring substance. The control regions of the TN liquid crystal cell can be acted on by an actuation voltage between an actuation level and a non-actuation level of the electro-optic characteristic curve, in which connection bright signs can be shown on a dark display surface by the liquid crystal cell. The liquid crystal cell can be acted on by an actuation voltage between the actuation level and a non-actuation level in the undershoot region of the characteristic having the least transmission.

REFERENCES:
patent: 3718382 (1973-02-01), Wysocki et al.
patent: 3898354 (1975-08-01), Parker
patent: 4277786 (1981-07-01), Waldron
patent: 4378955 (1983-04-01), Bleha, Jr. et al.
patent: 4491371 (1985-01-01), Nickol et al.

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