Liquid crystal light shutter

Details Liquid crystal light shutter Liquid crystal light shutter

1988-06-21

1990-01-16

Miller, Stanley D.

350349, G02F 1133

Patent

active

048939048

ABSTRACT:
An arrangement of the liquid crystal light shutter wherein its liquid crystal matter is two-frequency-driven by signals (or waveforms) in which frequencies (f.sub.H and f.sub.L) higher and lower than a frequency (f.sub.C), which inverts the dielectric aniostropy of the liquid crystal matter, is contained. The liquid crystal matter of this liquid crystal light shutter includes a dichroic dye, and serves to pass or absorb the light entering into the liquid crystal light shutter. This causes the liquid crystal light shutter to be opened or closed, and the liquid crystal light shutter is provided with a polarizing plate for polarizing the light passing through, or entering into this liquid crystal light shutter. The present invention relates to a second polarizing plate employed by the liquid crystal light shutter, for polarizing the light exiting the shutter.

REFERENCES:
patent: 3857628 (1974-12-01), Strong
patent: 4386836 (1983-06-01), Aoki et al.
patent: 4527864 (1985-07-01), Dir
patent: 4613209 (1986-09-01), Goodby et al.
patent: 4614954 (1986-09-01), Ohta et al.
patent: 4641156 (1987-02-01), Ohta et al.
patent: 4647156 (1987-03-01), Fujimura et al.
patent: 4745433 (1988-05-01), Fujimura et al.

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