Method and device for driving electro-optical light shutter

Details Method and device for driving electro-optical light shutter Method and device for driving electro-optical light shutter

1991-08-30

1993-09-21

Arnold, Bruce Y.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359245, 346160, 354463, 354464, G02F 101, G01D 1514, G03B 708

Patent

active

052473872

ABSTRACT:
A method and device for driving an electro-optical light shutter array including a plurality of shutter elements each having an electro-optical effect to polarize an incident light by setting up an electric field. The device includes a plurality of individual electrodes provided on the respective shutter elements and a common electrode provided on the respective shutter elements electrically in common. A square pulse is applied to the arbitrary individual electrode while a triangular pulse is applied to the common electrode to set up an electric field of which an intensity continuously varies within one driving period. Moreover, an alternating electric field may be set up in the electro-optical light shutter array in a recovery period. In this case, a first light amount when the positive electric field is set up and a second light amount when the negative electric field is set up are detected. A recovery operation is carried out until the first and second light amounts become substantially equal with each other.

REFERENCES:
patent: 3518634 (1970-06-01), Ballman et al.
patent: 3556663 (1971-01-01), Cary
patent: 4196396 (1980-04-01), Smith
patent: 4716384 (1987-12-01), Roe et al.
patent: 4902111 (1990-02-01), Matsubara et al.
patent: 4932761 (1990-06-01), Shingaki et al.

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