Colour separating unit and projecting pattern display device utilizing the same

[0071] refer to image 3 , the color lighting system used in the projection type image display device according to the preferred embodiment of the present invention includes a light source 60 that radiates a white light beam and a color separation unit 70, the color separation unit divides the white light beam emitted by the light source 60 into a plurality of colored light beams, Preferably three or more colored beams are split. Preferably, the color lighting system further includes a rolling unit 100, which periodically rolls the color light beams separated by the color separation unit 70 through rotational motion.

[0072] The light source 60 generates and radiates white light beams, and includes a light-generating lamp 61 and a reflector 63 that reflects light emitted from the lamp and guides the reflected light along a proceeding path. The reflecting mirror 63 is elliptical or parabolic. That is, one focal point of the elliptical reflector is at the position of the lamp...