Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1995-06-07
1997-01-07
Crane, Sara W.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
G02F 113, G02F 11343
Patent
active
055923151
ABSTRACT:
A liquid crystal device is constituted by (a) a pair of base plates each having an orientation control film thereon, and (b) a liquid crystal composition interposed between the base plates. The liquid crystal composition comprises a mixture including at least one liquid crystal compound which has a temperature range in which it shows chiral smectic phase and at least one optically active substance which does not have a temperature range in which it shows chiral smectic phase. The liquid crystal composition has a temperature range in which it shows cholesteric phase and is placed in chiral smectic phase which has been formed through cholesteric phase on temperature decrease. The liquid crystal composition comprises liquid crystal molecules having long axes forming a pre-tilt in the chiral smectic phase.
REFERENCES:
patent: 4781441 (1988-11-01), Kanbe et al.
patent: 5120466 (1992-06-01), Katagiri et al.
Kanbe Junichiro
Katagiri Kazuharu
Okada Shinjiro
Yoshinaga Kazuo
Abraham Fetsum
Canon Kabushiki Kaisha
Crane Sara W.
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