Ferroelectric liquid crystal optical modulation device providing

Details Ferroelectric liquid crystal optical modulation device providing Ferroelectric liquid crystal optical modulation device providing

1987-08-24

1988-10-11

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

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

350333, 350336, 340765, 340784, G02F 113

Patent

active

047766760

ABSTRACT:
An optical modulation device suited for gradational display, includes a first conductor film electrically connected to a first electrode and a second electrode, and a second conductor film disposed opposite to the first conductor film, an optical modulation material disposed between the first and second conductor films; and driving means for (a) setting the first electrode at a first reference potential and supplying the second electrode with a first voltage of one polarity relative to the first reference potential to furnish the first conductor film with a first potential gradient; (b) supplying the second conductor film with a first voltage of the other polarity relative to the first reference potential in phase with the first voltage of one polarity; (c) setting the second electrode at a second reference potential and supplying the first electrode with a second voltage of the other polarity relative to the second reference potential to furnish the first conductor film with a second potential gradient; (d) supplying the second conductor film with a second voltage of one polarity relative to the second reference potential in phase with the second voltage of the other polarity; and (e) setting the second voltage of one (or the other) polarity to satisfy a compliment relationship with the first voltage of the other (or one) polarity.

REFERENCES:
patent: 4139278 (1979-02-01), Matsumoto et al.
patent: 4193669 (1980-03-01), Richardson
patent: 4392718 (1983-07-01), Morrison
patent: 4516835 (1985-05-01), Suzuki et al.
patent: 4548476 (1985-10-01), Kaneko
patent: 4617646 (1986-10-01), Yang
patent: 4655561 (1987-04-01), Kanbe et al.
patent: 4712877 (1987-12-01), Okada et al.

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