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:
Nov. 30, 2010
Filed:
Aug. 18, 2008
Takashi Endo, Azumino, JP;
Joji Karasawa, Okaya, JP;
Takashi Endo, Azumino, JP;
Joji Karasawa, Okaya, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid crystal display device includes: a liquid crystal cell including liquid crystal operating in a twisted nematic mode; a first quartz plate optically compensating for the liquid crystal cell; a second quartz plate optically compensating for the liquid crystal cell; and a pair of polarizing elements disposed with the liquid crystal cell, the first quartz plate, and the second quartz plate interposed therebetween. Here, the thickness d [μm] of the first and second quartz plates, the polar angle θ [°] of the optical axis of the first and second quartz plates, and the cell gap CG [μm] of the liquid crystal cell satisfy the following conditional expressions:0.7(16 cosθ−23.6 cos θ+14.6)(1+0.32(−3.0))<  (1)<1.3(16 cosθ−23.6 cos θ+14.6))(1+0.32(−3.0))  (2).