Patent · US Active

Elliptical polarizer and vertical alignment type liquid crystal display device comprising the same

US8203673B2 · kind B2 · utility

10Cited by

10References

30Claims

0Family size

Assignee

NIPPON OIL CORPORATION · JP

Inventors

Tetsuya Uesaka · Yokohama, JP
Satoru Ikeda · Kasai, JP

Key dates

Filing date	Oct 30, 2007
Grant date	Jun 19, 2012
Priority date	—
Expiry date	Nov 20, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG02F2413/06
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An elliptical polarizer with excellent viewing angle characteristics is provided which comprises at least a first polarizer, a first optical anisotropic layer, a second optical anisotropic layer, and a third optical anisotropic layer, laminated in this order, wherein the first optical anisotropic layer satisfies [1] 50≦Re1≦500, the second optical anisotropic layer satisfies [2] 0≦Re2≦20 and [3] −500≦Rth2≦−30, and the third optical anisotropic layer satisfies [4] 100≦Re3≦180 wherein Re and Rth indicate the retardation values in the plane and thickness direction, respectively, of each of the optical anisotropic layers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.