Patent ID: 7988298
Filing Date: 2011-08-02
Classification: G03B

Abstract:
1. A projector comprising: a lighting optical system for emitting a lighting beam; a color separation/light guiding optical system for separating the lighting beam from the lighting optical system into optical paths for three colored light beams; a plurality of light modulation devices for modulating each of the separated colored light beams in accordance with image information, respectively; a light beam combining optical system for combining the colored light beams each modulated by the light modulation devices; and a projection optical system for projecting the light beams output via the light beam combining optical system, wherein the plurality of light modulation devices includes a normal view type light modulation device and a mirror image view type light modulation device, each of which has a viewing angle characteristic laterally reversed from each other, the viewing angle characteristic being a contrast profile of the light modulation device where the contrast varies based on an inclination direction of an incident light beam, the colored light beam modulated by the normal view type light modulation device transmits through the light beam combining optical system, the colored light beam modulated by the mirror image view type light modulation device is reflected by the light beam combining optical system and is laterally reversed, and at least one optical element included in the lighting optical system and the color separation/light guiding optical system is shifted and/or rotated with respect to a system optical axis such that an average incident angle of the lighting beam to the normal view type light modulation device and an average incident angle of the lighting beam to the minor image view type light modulation device are laterally reversed from each other.