Liquid crystal electro-optic device with two materials different

Details Liquid crystal electro-optic device with two materials different Liquid crystal electro-optic device with two materials different

1991-09-27

1993-10-12

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 51, 359 81, G02F 113, G02F 11339

Patent

active

052530906

ABSTRACT:
A liquid crystal device comprising a liquid crystal electro-optic layer supported between a pair of substrates furnished with electrodes, provided that at least one of said substrates is transparent, characterized by that said liquid crystal electro-optic layer comprises a liquid crystal material, a first transparent material, and a second transparent substance whose refractive index is different from those of the liquid crystal material and the first transparent material is disclosed. The liquid crystal electro-optic layer may otherwise comprise a liquid crystal material and a mixed transparent substances provided that the refractive index thereof is controlled to be about the same as that of the liquid crystal material. The device has improved display contrast and is capable of an increase light transmittance to 4 times as large as that of a conventional one.

REFERENCES:
patent: 4165157 (1979-08-01), Kobale et al.
patent: 4249800 (1981-02-01), Spruijt
patent: 4435047 (1984-03-01), Fergason
patent: 4950052 (1990-08-01), Fergason et al.
patent: 5056898 (1991-10-01), Ma et al.
patent: 5130831 (1992-07-01), Kohara et al.
patent: 5178571 (1993-01-01), Mase

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