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. 10, 2009
Filed:
Jun. 24, 2004
Makoto Yoneya, Hitachinaka, JP;
Kishiro Iwasaki, Hitachiota, JP;
Yasushi Tomioka, Hitachi, JP;
Hisao Yokokura, Hitachi, JP;
Katsumi Kondo, Hitachinaka, JP;
Yoshiharu Nagae, Hitachi, JP;
Makoto Yoneya, Hitachinaka, JP;
Kishiro Iwasaki, Hitachiota, JP;
Yasushi Tomioka, Hitachi, JP;
Hisao Yokokura, Hitachi, JP;
Katsumi Kondo, Hitachinaka, JP;
Yoshiharu Nagae, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An active-matrix liquid crystal display device includes a pair of substrates, a liquid crystal layer disposed between the pair of substrates, a group of electrodes for applying to the liquid crystal layer an electric field substantially parallel to the substrate plane and a plural number of active elements being formed on one of the pair of substrates, and an alignment layer disposed between the liquid crystal layer and at least one of the pair of substrates. The alignment layer is made from polyamic acid obtained by reacting a diamine with an acid anhydride, and the acid anhydride is at least one member selected from the group consisting of 1,2,3,4-cyclopentanetetracarboxylic acid dianhydride, 1,2,3,4-butanetetracarboxylic acid dianhydride, and 1,2,3,4-cyclobutanetetracarboxylic acid dianhydride.