Optical modulation device using ferroelectric liquid crystal and

Details Optical modulation device using ferroelectric liquid crystal and Optical modulation device using ferroelectric liquid crystal and

1987-08-25

1988-09-27

Miller, Stanley D.

350333, 350336, G02F 113

Patent

active

047737387

ABSTRACT:
An optical modulation device includes: a ferroelectric liquid crystal disposed between a pair of substrates; provision for applying an alternating voltage sufficient to render the ferroelectric liquid crystal turbid; and provision for superposing a DC voltage on the alternating voltage. A portion of the ferroelectric liquid crystal rendered turbid through the application of an alternating voltage is selectively caused to have an increased transmittance when superposed with a DC voltage.

REFERENCES:
patent: 4139273 (1979-02-01), Crossland et al.
patent: 4367924 (1983-02-01), Clark et al.
patent: 4419664 (1983-12-01), Crossland et al.
patent: 4563059 (1986-01-01), Clark et al.
patent: 4598978 (1986-07-01), Mourey et al.
patent: 4668051 (1987-05-01), Mourey et al.

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