Liquid crystal optical device

Details Liquid crystal optical device Liquid crystal optical device

1989-06-12

1990-05-29

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

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

350331R, 350332, 340784, 340713, 355 40, G02F 113, G09G 302

Patent

active

049290576

ABSTRACT:
A liquid crystal optical device including a plurality of optical shutters is provided. The optical device includes a first glass substrate having N common electrodes disposed thereon and a second glass substrate having N signal electrodes disposed thereon, the glass substrates spaced apart and opposed to each other so that the electrodes are crossed. A liquid crystal material including a nematic liquid cyrstal having dielectric anisotropy which becomes 0 at a crossing frequency (fC) of 100 KHz or below at atmospheric temperatures including an optically active material encapsulated between the glass substrates. Polarizing plates are disposed on the outside of the liquid crystal panel and the device is driven in a N time-sharing mode by applying the driving signals to the common electrode and the signal electrodes. The optical device is particularly well suited for use in an optical printer in view of the rapid response times.

REFERENCES:
patent: 4386836 (1983-06-01), Aoki et al.

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