Ferroelectric liquid crystal display in which the switching angl

Details Ferroelectric liquid crystal display in which the switching angl Ferroelectric liquid crystal display in which the switching angl

1996-10-25

1998-10-06

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349 74, 349172, G02F 1133, G02F 11347, C09K 1902

Patent

active

058185488

ABSTRACT:
A ferroelectric liquid crystal display comprises two liquid crystal cells disposed one behind the other between two polarizers, one cell having line electrodes and the other having pixel electrodes. The pixel electrodes are driven with image information in synchronism with the line electrodes. The orientation and refractive index of the liquid crystal cells are so chosen that transmission is not substantially altered when the control voltages are reversed. The two displays are so actuated that the switching angle never exceeds .+-.22.5.degree.. The polarity of the voltages is periodically so inverted that on average there is no DC voltage across the cells.

REFERENCES:
patent: 4099855 (1978-07-01), Wisbey et al.
patent: 5126894 (1992-06-01), Akiyama et al.
patent: 5477354 (1995-12-01), Schehrer

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