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. 23, 2007
Filed:
Mar. 28, 2005
Akiko Toriyama, Kanagawa, JP;
Mieko Suzuki, Kanagawa, JP;
Akiko Toriyama, Kanagawa, JP;
Mieko Suzuki, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
An active matrix drive type liquid crystal display element capable of preventing deterioration of display capability caused by a stripe domain, and a projection type display device using the liquid crystal display element, by which there is provided a projection type display device comprising a light source; a light convergence optical system for guiding a light emitted from said light source to a liquid crystal display element; and a projection optical system for enlarging and projecting a light subjected to light modulation by said liquid crystal display element; wherein the liquid crystal display element is configured by holding a liquid crystal layer between a pair of substrates arranged to face to each other, and a twisted nematic type liquid crystal material used in the liquid crystal layer satisfies dielectric constant anisotropy Δε of 0<Δε<8 and twist elasticity modulus Kof K>6.0 pN when the refractive index anisotropy Δn is 0.16≦Δn≦0.18 and satisfies dielectric constant anisotropy Δε of 0<Δε<13 and twist elasticity modulus Kof K>3.0 pN when the refractive index anisotropy Δn is 0.18≦Δn≦0.20.