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:
May. 10, 2005
Filed:
Dec. 12, 2003
Masahiro Hata, Ibaraki, JP;
Hiroyuki Okada, Ibaraki, JP;
Kiichi Shimodaira, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki, JP;
Abstract
A laminated optical film including an optical film () whose three dimensional refractive index is controlled so that an Nz coefficient represented with Nz=(nx−nz)/(nx−ny) satisfies a relationship of Nz≦0.9, when a direction where a refractive index in a film plane gives maximum is defined as X-axis, a direction perpendicular to X-axis as Y-axis, a thickness direction of the film as Z-axis, and refractive indexes in each axial direction are defined as nx, ny, and nz, respectively, and an optical film () that is formed with a material showing optically negative uniaxial property, and being tilting aligned. The laminated optical film may suppress coloring of the display, and may display a picture with few tone reversal regions.