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, 2017
Filed:
Apr. 16, 2014
Konica Minolta, Inc., Chiyoda-ku, Tokyo, JP;
Rie Fujisawa, Ebina, JP;
Hiroyoshi Kiuchi, Hachioji, JP;
Kiyoshi Fukusaka, Fussa, JP;
Takatugu Suzuki, Hachiohi, JP;
Hiroshi Kita, Hachioji, JP;
KONICA MINOLTA, INC., Tokyo, JP;
Abstract
Provided is an optical film containing a cellulose derivative, the optical film having an in-plane retardation Rowithin the range of 120 to 160 nm measured at a wavelength of 550 nm under an atmosphere of a temperature of 23° C. and a relative humidity of 55%, and a ratio Ro/Rowithin the range of 0.65 to 0.99, Ro/Robeing a ratio of an in-plane retardation Romeasured at a wavelength of 450 nm to the in-plane retardation Romeasured at a wavelength of 550 nm, wherein, a substituent of a glucose skeleton in the cellulose derivative satisfies the requirements (a) and (b) which are described in the specification, and the optical film contains a compound A satisfying the following condition defined by Expression (a1) which is described in the specification.