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. 18, 2006
Filed:
Jun. 09, 2004
Masahiro Hata, Ibaraki, JP;
Masahiro Hata, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki, JP;
Abstract
A laminated optical film comprising 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, an optical film () showing optically positive uniaxial property that satisfies a relationship of nx>ny≅nz, and an optical film () formed of a material showing optically negative uniaxial property, and the material being tilting aligned, enables inhibition of coloring of display image for observation of a display picture in a diagonal direction to normal line of a screen, and enables display of an image having little gradation inversion areas, and that has outstanding durability.