Patent ID: 7172287
Filing Date: 2007-02-06
Classification: H04N

Abstract:
1. A first illuminating optical system, comprising: a first dichroic mirror for receiving a light emitted from a lamp, polarization components of the light being arrayed in one direction, and transmitting B (Blue) light and reflecting G (Green) and R (Red) lights; a second dichroic mirror for receiving the light, whose optical path is separated, and transmitting the R light and reflecting the G light; first, second and third film type PBSs (Polarized Beam Splitters) for transmitting the R, G, and B lights, respectively; first, second, and third LCoS (Liquid Crystal on Silicon) panels for changing a phase of respective lights transmitted through the first, second, and third film type PBSs, and reflecting the phase changed lights, and an X-prism for receiving the R, G, and B lights that are reflected twice by the first, second, and third LCoS panels first, followed by the first, second, and third film type PBSs, and combining the R, G, and B lights and permitting the combined lights to incident on a projection lens.