Driving method for ferro-electric liquid crystal optical modulat

Details Driving method for ferro-electric liquid crystal optical modulat Driving method for ferro-electric liquid crystal optical modulat

1993-06-21

1994-03-22

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

345 87, G02F 1133, G09G 336

Patent

active

052969533

ABSTRACT:
A driving method for an optical modulation device comprising matrix picture elements each formed at intersecting points of scanning lines and data lines between which a bistable optical modulation material represented by a ferroelectric liquid crystal is interposed. The driving method comprises an erasure step of applying a voltage signal orienting the optical modulation material to the first stable state between the scanning and data lines, at all or a part of the matrix picture elements, and a writing step of sequentially applying a scanning selection signal to the scanning lines and applying an information orientation signal orienting the optical modulation material to the second stable state to the data lines in phase with the scanning selection signal.

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