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:
Jun. 27, 1995
Filed:
Jul. 26, 1993
Katsuyuki Murashiro, Ichiharashi, JP;
Makoto Kikuchi, Kisarazushi, JP;
Kanetsugu Terashima, Ichiharashi, JP;
Chisso Corporation, Osaka, JP;
Abstract
A ferroelectric liquid crystal composition having a SC* phase and a light-switching element using the composition are provided, which composition comprises the following components, A, B and C, each in a specified proportion: Component A has the formula ##STR1## wherein ##STR2## R.sup.1 and R.sup.2 are same or different linear or branched alkyl, alkoxy or alkanoyloxy of 1-18C, X is H, halogen or CN, l, m and n are 0 or 1 and (l+m+n) is 1 or 2, and has smectic C phase; Component B has the formula ##STR3## wherein ##STR4## Y is H, halogen or CN, k is 0 or 1, R.sup.3 is linear or branched alkyl or alkoxy of 1-18C, and * is asymmetric C, and consists of optically active compounds having the same senses of Ps in SC* phase induced when dissolved in smectic C liquid crystal, to one another; and Component C has the formula ##STR5## wherein ##STR6## Z is H, halogen or CN, R.sup.5 and R.sup.6 are same or different linear or branched alkyl or alkoxy of 1-18C R.sup.4 is 12-18C alkyl or 1-18C linear or branched alkoxy, and * is asymmetric C, and is an optically active compound having the same sense of Ps in SC* phase induced when dissolved in smectic C liquid crystal as that of the compound of component B.