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:
Oct. 31, 2000
Filed:
Sep. 17, 1998
Hideaki Takao, Machida, JP;
Masahiro Terada, Hadano, JP;
Yasushi Shimizu, Atsugi, JP;
Katsumi Arai, Minanomachi, JP;
Shosei Mori, Hiratsuka, JP;
Yasufumi Asao, Atsugi, JP;
Takashi Moriyama, Atsugi, JP;
Takeshi Togano, Chigasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid crystal device is constituted by a pair of substrates each provided with an electrode, and a chiral smectic liquid crystal composition disposed between the substrates. At least one of the substrates is provided with an alignment control film of a polyimide represented by the following formula (I): ##STR1## in which A denotes a planar tetravalent organic residue group; B denotes a divalent group represented by --CR.sub.1 (R.sub.2)-- where R.sub.1 and R.sub.2 independently denote H or alkyl group; a, b and c are independently 0 or 1; x and y are independently an integer of at least 0 and x+y=at least 1; and n is an integer of at least 2.