Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1994-06-03
1996-06-04
Gross, Anita Pellman
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 78, G02F 11337, G02F 1141
Patent
active
055238718
ABSTRACT:
A liquid crystal device is constituted by a pair of substrates each having thereon an electrode and a uniaxial alignment film, and a chiral smectic liquid crystal disposed between the substrates. At least one of the uniaxial alignment films is a film comprising an electroconductive polymer doped with at least two species of dopants, which preferably include a first type dopant capable of dedoping into the liquid crystal due to electric field application or diffusion, and a second type dopant substantially incapable of dedoping into the liquid crystal. The resultant liquid crystal device is alleviated with respect to voltage hysteresis and is suitable for gradational display.
REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 4881798 (1989-11-01), Yuasa et al.
patent: 4965017 (1990-10-01), Holmes
patent: 5231523 (1993-07-01), Nakaya
patent: 5239398 (1993-08-01), Yanaglsawa
patent: 5357357 (1994-10-01), Imazeki
Kishi Etsuro
Shibata Masaaki
Yuasa Satoshi
Canon Kabushiki Kaisha
Gross Anita Pellman
Nguyen Tiep H.
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