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:
Oct. 31, 2006
Filed:
Jun. 09, 2004
Applicants:
Masahiro Hata, Ibaraki, JP;
Ryouji Kinoshita, Ibaraki, JP;
Shuuji Yano, Ibaraki, JP;
Masayuki Kawai, Ibaraki, JP;
Inventors:
Masahiro Hata, Ibaraki, JP;
Ryouji Kinoshita, Ibaraki, JP;
Shuuji Yano, Ibaraki, JP;
Masayuki Kawai, Ibaraki, JP;
Assignee:
Nitto Denko Corporation, Ibaraki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/13363 (2006.01); G02F 1/139 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical film obtained by stretching a polymer film comprising a polycarbonate resin and a styrene resin: wherein a photoelastic coefficient is 2.0×10to 6.0×10m/N, and a three dimensional refractive index is controlled so that an Nz coefficient may satisfy a relationship of Nz≦0.9 and a front retardation (Re) may satisfy a relationship of Re≧80 nm, has characteristics of giving wide viewing angle and also outstanding durability.