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. 07, 2006
Filed:
Mar. 26, 2004
Tetsuji Suzuki, Yokosuka, JP;
Keiichi Maeno, Tokyo, JP;
Satoru Moriya, Noda, JP;
Victor Company of Japan Ltd., Yokohama, JP;
Abstract
A projection display apparatus that is lightweight and provides bright, high quality images is provided. The projection display apparatus comprising a color separation and synthesis optical system, that performs color synthesis, generating an image, after separating light of the three primary colors of determined polarities into the respective three colors, and modulating those three color lights in relation to respective image signals therefor, and a projection lens. The color separation and synthesis optical systemcomprises polarized light separating meansanddisposed in respective diagonal directions therein and reflecting spatial light modulating elementsanddisposed to perform light modulation coordinated to an image signal for each respective color, for light separated according to polarization by the four polarized light separating means. Three spatial light modulating elementsandare disposed on the outer side of the polarized light separating meansand, other than the polarized light separating means, that is disposed on that side of incident light, at least two from among the four polarized light separating meansandare wire grid polarized light separating plates and an astigmatism correcting lensis provided between the polarized light separating meansdisposed on that side at which projection is performed and at least one of the spatial light modulating elements.