Liquid crystal composition, liquid crystal device, display appar

Details Liquid crystal composition, liquid crystal device, display appar Liquid crystal composition, liquid crystal device, display appar

1992-02-19

1993-10-05

Lovering, Richard D.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229962, 25229963, 359104, C09K 1934, C09K 1930, G02F 113

Patent

active

052502180

ABSTRACT:
A liquid crystal composition, comprising: at least one mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sup.1 and R.sup.2 independently denote a linear or branched alkyl group having 1-18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of --O--, --CO--, --COO--, --OCO--, --OCOO-- or --CH(X)-- with the proviso that --O-- cannot directly be connected to --O-- and X denotes halogen; Z.sup.1 denotes --COO-- or --CH.sub.2 O--; X.sup.1 and X.sup.2 independently denote a single bond, --O--, --COO--, --OCO--, --CO-- or --OCOO--; A.sup.1 denotes a single bond, ##STR2## Y.sup.1 and Y.sup.2 independently denote hydrogen, halogen, --CH.sub.3 -- or CF.sub.3 --; and at least one mesomorphic compound represented by the following formula (II): ##STR3## wherein R.sup.3 and R.sup.4 independently denote a linear or branched alkyl group having 1-18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of --O--, --CO--, --COO--, --OCO--, --OCOO-- or --CH(X)-- with the proviso that --O-- cannot directly be connected to --O-- and X denotes halogen; X.sup.3 and X.sup.4 independently denotes a single bond, --O--, --COO--, --OCO-- or --CO--; Z.sup.2 denotes a single bond, --COO-- or --OCO--; A.sup.2, A.sup.3 and A.sup.4 independently denote a single bond, ##STR4## Y.sup.3 and Y.sup.4 independently denote hydrogen, halogen, --CH.sub.3 or --CF.sub.3 ; and k is 0 or 1 with the proviso that X.sup.3 is a single bond when A.sup.2 is a single bond, and X.sup.4 is a single bond when A.sup.3 is a single bond and k is 0. The liquid crystal composition is easily aligned by a simple rubbing method to provide a uniform monodomain and further provides wider driving voltage and temperature margins effective for providing a practical ferroelectric liquid crystal device.

REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 4880560 (1989-11-01), Yoshinaga et al.
patent: 5034151 (1991-07-01), Shinjo et al.
patent: 5075030 (1991-12-01), Togano et al.
patent: 5076961 (1991-12-01), Nakamura et al.
patent: 5091109 (1992-02-01), Takiguchi et al.
patent: 5116530 (1992-05-01), Togano et al.
Berichte der Deutschen Chemischen Gesellschaft (1911) 1542:52.
Bulletin of the Chemical Society of Japan, vol. 60, No. 3 (1987) 1159:60.

Affiliated with

Also associated with

Rating

Liquid crystal composition, liquid crystal device, display appar 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 composition, liquid crystal device, display appar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal composition, liquid crystal device, display appar will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1001581