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. 30, 2007
Filed:
Aug. 01, 2006
Shigeo Shimizu, Yokohama, JP;
Shigeo Shimizu, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A reflective liquid crystal projection apparatusis composed of a light source, a polarizing plateA for incident light, a reflective liquid crystal element, another polarizing plateB for reflected light that is disposed in the cross Nicol relation with the polarizing plateA and a phase difference compensating platedisposed between the reflective liquid crystal elementand the other polarizing plateB. The reflective liquid crystal projection apparatusprojects a picture image formed in the reflective liquid crystal elementon a screenthrough a projection lens. The phase difference compensating platehas no anisotropy in a plane parallel direction and a larger refractive index in the plane parallel direction than another refractive index in the thickness direction, and is disposed with being slightly tilted with respect to the reflective liquid crystal element. Accordingly, a picture image high in brightness and high in black and white contrast ratio can be projected on the screen