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:
Jul. 17, 2012
Filed:
Sep. 29, 2006
Tadashi Omatsu, Minami-Ashigara, JP;
Nobutaka Fukagawa, Minami-Ashigara, JP;
Hiromoto Haruta, Minami-Ashigara, JP;
Yutaka Nozoe, Minami-Ashigara, JP;
Tomohiro Ogawa, Minami-Ashigara, JP;
Hiroaki Sata, Minami-Ashigara, JP;
Tadashi Omatsu, Minami-Ashigara, JP;
Nobutaka Fukagawa, Minami-Ashigara, JP;
Hiromoto Haruta, Minami-Ashigara, JP;
Yutaka Nozoe, Minami-Ashigara, JP;
Tomohiro Ogawa, Minami-Ashigara, JP;
Hiroaki Sata, Minami-Ashigara, JP;
FUJIFILM Corporation, Minato-Ku, Tokyo, JP;
Abstract
A cellulose derivative film having high optical isotropy over the whole visible region and high durability against high temperature and humidity conditions is provided. The film contains a cellulose derivative having a substituent the polarizability anisotropy Δα (=αx−(αy+αz)/2) of which is 2.5×10cmor more, and the film has an in-plane retardation Re and a thickness direction retardation Rth satisfying the respective inequalities: |Rth(589)|≦25 nm and |Re(589)|≦10 nm. Also provided are an optical compensation film, a polarizing plate, and a liquid crystal device that use the cellulose derivative film and exhibit excellent viewing angle characteristics and durability.