The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 1997
Filed:
May. 05, 1995
Etsuo Nakagawa, Chibaken, JP;
Shinichi Sawada, Chibaken, JP;
Chisso Corporation, Osaka, JP;
Abstract
Disclosed are liquid crystal compositions each comprising a first component (formula (I)), a second component (formula (II)), a third component (formulae (III) to (V)) and a fourth component (formulae (VI) and (VII)): ##STR1## R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.9 each are a C.sub.1-8 alkyl; n, m, p, q and r each are 0 or 1; R.sub.8 and R.sub.10 each are a C.sub.1-8 alkyl or alkoxy, or a C.sub.2-8 alkoxymethyl; A.sub.1 is a 1,5-cyclohexylene, 1,4-phenylene or 1,3-dioxane-2,5-diyl; A.sub.2 and A.sub.5 each are a 1,4-cyclohexylene, 1,4-phenylene or pyrimidine-2,5-diyl; A.sub.3, A.sub.4, A.sub.6 and A.sub.7 each are a 1,4-cyclohexylene or 1,4-phenylene; Z.sub.1, Z.sub.3 and Z.sub.6 each are --COO-- or a single bond; Z.sub.2 and Z.sub.4 each are --CH.sub.2 --CH.sub.2 --, --CH.dbd.CH-- or a single bond; Q and Z.sub.5 each are --CH.sub.2 CH.sub.2 -- or a single bond; L, X and T each are F or H; S is F, Cl or CF.sub.3. Also provided are electro-optical display devices containing any of these compositions, which have rapid response and can be driven even at a low voltage. The temperature-dependence of the driving voltage for the devices is reduced.