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:
Nov. 17, 1992
Filed:
Oct. 02, 1989
Akira Tsuboyama, Sagamihara, JP;
Yutaka Inaba, Kawaguchi, JP;
Akio Yoshida, Chigasaki, JP;
Yukio Hanyu, Atsugi, JP;
Toshiharu Uchimi, Atsugi, JP;
Masataka Yamashita, Hiratsuka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A ferroelectric liquid crystal device comprises a pair of opposite electrodes and a ferroelectric liquid crystal disposed between the electrodes. At least one of the opposite electrodes is coated with a primer layer and an alignment layer on the primer layer. The alignment layer has a thickness d.sub.2 and is made of a material having a dielectric constant .epsilon..sub.2, and the primer layer has a thickness d.sub.1 and is made of a material having a dielectric constant .epsilon..sub.1 which are greater than d.sub.2 and .epsilon..sub.2, respectively. The ferroelectric liquid crystal is at least one mesomorphic compound represented by the formula R.sub.1 --A.sub.1 --X--A.sub.2 --R.sub.2 wherein A.sub.1 and A.sub.2 respectively denote a 6-membered ring-containing divalent group; X denotes a single bond or a divalent chain group; and R.sub.1 and R.sub.2 respectively denote a branch or linear chain group, R.sub.1 and R.sub.2 being the same or different.