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:
Oct. 10, 2006
Filed:
Dec. 23, 2004
Toshiya Ootake, Fukaya, JP;
Toshiya Ootake, Fukaya, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A liquid crystal display device includes an electrode substrate, a liquid crystal layer with no twist, a first retardation plate, a second retardation plate, polarizing plates, and a color filter. The first and second retardation plates have slow axes that are parallel or perpendicular to the alignment direction of liquid crystal molecules. The product of the refractive anisotropy Δn of the liquid crystal layer and the thickness d of the liquid crystal layer, the retardation Rof the first retardation plate and the retardation Rof the second retardation plate satisfy at least one of the relational expressions:530 nm≦Δ12≦570 nm,−20 nm≦Δ12≦20 nm,255 nm≦Δ12≦295 nm, and255 nm≦Δ12≦295 nm.