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:
Sep. 09, 2008
Filed:
Aug. 18, 2004
Yuzo Hisatake, Yokohama, JP;
Yuzo Hisatake, Yokohama, JP;
Toshiba Matsushita Display Technology Co., Ltd., Tokyo, JP;
Abstract
A liquid crystal display device includes a liquid crystal panel having a structure in which a liquid crystal layer LQ is held between a pair of electrode substrates AR, CT, a pair of polarizers PL which hold the liquid crystal panel therebetween, and a pair of optical retardation plates RT arranged between the liquid crystal panel and the pair of polarizers PL. Each optical retardation plate RT has a refractive anisotropy in which average refractive indices nx, ny, and nz in an x-axis direction, a y-axis direction, and a z-axis direction being perpendicular to each other satisfy nx>ny>nz in a state when the z-axis direction conforms to the normal direction. The x-axis direction of each optical retardation plate RT is almost parallel to the transmission axis of the polarizer PL adjacent to a corresponding optical retardation plates RT.