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. 05, 1996
Filed:
Oct. 19, 1994
Toshihiko Kato, Tsukuba, JP;
Masami Yusa, Shimodate, JP;
Nobuo Miyadera, Tsukuba, JP;
Hideyuki Hashimoto, Tsukuba, JP;
Yasuo Miyadera, Tsukuba, JP;
Masahiro Kawakami, Hitachi, JP;
Hitachi Chemical Company, Ltd, Tokyo, JP;
Abstract
An alignment film for liquid crystal is provided which comprises a polyimide comprising a repeating unit of the general formula (I): ##STR1## wherein n is an integer of from 2 to 16 and R.sup.1 represents a divalent organic group. This polyimide is obtained for example, from a reaction between ethylene glycol bis(trimellitate dianhydride) and 4,4'-diaminodiphenyl ether. This polyimide or a varnish of a precursor thereof is coated on a plate, and dried to obtain an alignment film for liquid crystal, which stably exhibits a high pretilt angle, irrespective of curing temperatures. The present invention further provides a liquid crystal-sandwiched panel and a liquid crystal display module prepared using the alignment film as well as a material for the preparation of the alignment film.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile