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:
Aug. 01, 1995
Filed:
Feb. 28, 1994
Kiyomi Sugawara, Sendai, JP;
Yoshihiko Ishitaka, Miyagi, JP;
Hiroshi Yamagami, Nagaoka, JP;
Masahiko Yamaguchi, Sendai, JP;
Mitsuru Kano, Furukawa, JP;
Hiroyuki Hebiguchi, Sendai, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
An orientation film for a liquid crystal display. The film is formed on a substrate and has a first irregular form repeated in a first direction and a second irregular form repeated in a second direction, which is perpendicular to the first direction. The second irregular form has a longer pitch than the pitch of the first irregular form. The profile of the second irregular form in any plane perpendicular to the first direction has a portion inclined with respect to the substrate. The pretilt angle of the orientation film is high. The patterns may be irregular and asymmetric, which may be ridges separated by a continuous groove. The orientation may be formed by using a first mold having one of the patterns, and a second mold with a second pattern, or first and second holographic exposed layers. The orientation layer may be a liquid crystal polymer which is formed by using a heated stamper to form a pattern in a high polymer liquid crystal while applying a voltage.