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. 16, 2004
Filed:
Jul. 02, 2003
Color separation and color synthesis optical system and reflection type projection display apparatus
Tetsuji Suzuki, Yokosuka, JP;
Shogo Masuda, Hachioji, JP;
Ryuuji Akino, Fujisawa, JP;
Makoto Ashihara, Yokohama, JP;
Takayuki Kashiwagi, Yokohama, JP;
Victor Company of Japan, Limited, Yokohama, JP;
Abstract
Disclosed is a color separation and color synthesis optical system provided between a light source portion and a projection optical system in a reflection type projection display apparatus, which color-separates a white color beam emitted from the light source portion into three primary color light beams of R (red), G (green) and B (blue), guides the three primary color light beams to a plurality of spatial light modulators corresponding to R, G and B, and color-synthesizes color light beams optically modulated by the respective spatial light modulators for the colors depending on video signals to emit a color-synthesized light beam, wherein at least one or more wavelength-selective polarization converting plates which rotate a plane of polarization of a specific color light beam by 90 degrees are located, and the wavelength-selective polarization converting plate is adhered to an incidence plane and/or an emission plane of a polarization beam splitter by adhesive with a slight gap.