Liquid crystal device having at least two zones having different

Details Liquid crystal device having at least two zones having different Liquid crystal device having at least two zones having different

1991-03-26

1992-08-04

Miller, Stanley D.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

259 69, 259 84, 259 94, G02F 113

Patent

active

051364093

ABSTRACT:
A liquid crystal element includes a liquid crystal having a molecular orientation varying according to an applied voltage, first upper and lower electrodes which are opposed in plane to each other and between which the liquid crystal is interposed, and second upper and lower electrodes which are not opposed in plane to each other and between which the liquid crystal is interposed. Phasic variations of the liquid crystal element are obtained by means of a first electric field which is impressed on the liquid crystal by applying a first voltage between the first upper and lower electrodes and a second electric filed which is generated by applying between the second upper and lower electrodes a second voltage which differs from the first voltage.

REFERENCES:
patent: 3834794 (1974-09-01), Sorey
patent: 3883227 (1975-05-01), Kobayashi et al.
patent: 3981559 (1976-09-01), Channin
patent: 4333708 (1982-06-01), Boyd et al.
patent: 4645304 (1987-02-01), Kawamura et al.
patent: 4804251 (1989-02-01), Jacobs
patent: 4836657 (1989-06-01), Gunji et al.
Sorey, "Field effects in nematic liquid crystals obtained with interdigital electrodes", Appl. Phys. vol. 45, No. 12, Dec. 1974, (pp. 5466-5468).
Aviram et al, "Surface Reorientation Liquid Crystals Display Device", IBM, vol. 15, No. 6, Nov. 1972.

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