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:
Mar. 05, 2013
Filed:
Feb. 09, 2009
Mitsuru Takigawa, Yao, JP;
Mitsuo Moriya, Yao, JP;
Naohiko Nakagawa, Yao, JP;
Hosiden Corporation, Yao-Shi, JP;
Abstract
A vertically aligned liquid crystal display device is provided in which the phase difference value is increased be-yond a usual range, whereby the ON transmittance in high duty driving is increased to improve the contrast and the viewing angle. In the vertically aligned liquid crystal display device, the phase difference value in the thickness direction of the liquid crystal layeris set in a range of from 500 nm to 1,600 nm, and a first phase difference plateis inserted between the first and second polarizing platesin which the absorption axesandper-pendicularly intersect with each other. The first phase difference plateis a uniaxial phase difference plate which has a negative refractive index anisotropy, in which the phase difference value in the thickness direction is set in a range of from 220 nm to 1,320 nm, and which has the optical axis perpendicular to first and second glass substratesbetween which a liquid crystal layeris interposed.