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:
Jan. 06, 2009
Filed:
Nov. 14, 2005
Soo-jin Jang, Seoul, KR;
Byoung-kun Jeon, Daejeon, KR;
Sergey Belyaev, Dajeon, KR;
Jun-won Chang, Daejeon, KR;
Soo-jin Jang, Seoul, KR;
Byoung-kun Jeon, Daejeon, KR;
Sergey Belyaev, Dajeon, KR;
Jun-won Chang, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
A vertically aligned liquid crystal display (VA-LCD) according to one embodiment has liquid crystal cells in which liquid crystals with a negative dielectric anisotropy are filled and which is provided between a first polarizer and a second polarizer, whose absorption axes are perpendicular to each other. The VA-LCD includes a sheet of +A plate and a sheet of −C plate, disposed between the first polarizer and the liquid crystal cells, and a sheet of +A plate disposed between the second polarizer and the liquid crystal cells, where an optical axis of the +A plate near the first polarizer is perpendicular to the absorption axis of the first polarizer, and an optical axis of the +A plate near the second polarizer is parallel with the absorption axis of the second polarizer, and where a thickness retardation value of the −C plate is in the range of −500 nm to −30 nm for a wavelength of 550 nm.