Compositions – Liquid crystal compositions
Patent
1996-10-09
1997-11-11
Wu, Shean C.
Compositions
Liquid crystal compositions
349 84, 349123, 349126, 349128, 349132, 349133, 349135, 349187, 428 1, C09K 1952, G02F 1133
Patent
active
056860196
ABSTRACT:
A liquid crystal device is constituted by a first substrate and a second substrate disposed opposite to each other, and a liquid crystal lacking cholesteric phase disposed between the first and second substrates. The first substrate has a surface contacting the liquid crystal showing a surface energy .gamma..sub.1 (dyne/cm) and the second substrate has a surface contacting the liquid crystal showing a surface energy .gamma..sub.2 (dyne/cm) satisfying .gamma..sub.1 >.gamma..sub.2. The surface of the first substrate is provided with a film of a polyimide or an aromatic polyamide, and the surface of the first substrate having been selectively subjected to a uniaxial aligning treatment. As a result, the liquid crystal can assume a stable alignment state of a bookshelf structure or one close thereto having a small layer inclination angle. The resultant device can show a high contrast and a good responsiveness.
REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 5153755 (1992-10-01), Higa
patent: 5262082 (1993-11-01), Janulis et al.
patent: 5298297 (1994-03-01), Takei
patent: 5320883 (1994-06-01), Asaoka et al.
patent: 5381256 (1995-01-01), Hanyu et al.
patent: 5400159 (1995-03-01), Takao et al.
patent: 5576864 (1996-11-01), Takao et al.
Molecular Crystals & Liquid Crystals, vol. 202 (Jul. 1991) pp. 123-147.
"Voltage-dependent optical activity of a twisted nematic liquid crystal," M. Schadt & W.Helfrich, Appl. Phys. Lett., V.18(4), 15 Feb. 1971, pp. 127-128.
"Tristable Switching in Surface stabilized Ferroelectric liquid crystals with a large spontaneous polarization", A.D.L. Chandani et al., Japanese Journal of Applied Physics, vol. 27 #5, May 1988, pp. L729-L732.
Canon Kabushiki Kaisha
Wu Shean C.
LandOfFree
Liquid crystal device and liquid crystal apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid crystal device and liquid crystal apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal device and liquid crystal apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1226246