Patent ID: 6491398
Filing Date: 2002-12-10
Classification: H04N

Abstract:
A video projector comprising:an optical source for radiating light; a reflecting mirror for reflecting said light radiated by said optical source as a reflected light beam goes along a particular optical axis; a converting optical system for converting a profile of said reflected light beam from said reflecting mirror; a plurality of color prisms for wavelength-separating said converted-light from said converting optical system into a plurality of colored light beams; a plurality of digital micro-mirror devices for selectively reflecting each of said colored light beams from said color prisms on a pixelâ€”pixel basis in accordance with each of received video signals, respectively; a projecting lens for projecting light obtained through wavelength-combining, by said color prisms, of light beams reflected by each of said digital micro-mirror devices; and a plurality of condenser lenses disposed between said color prisms and said digital micro-mirror devices, respectively, wherein each diameter of said converted light from said optical system is reduced immediately before said plurality of digital micro-mirror devices by said optical system so that each diameter of said plurality of condenser lenses is reduced and a diameter of a light beam at a pupil position of said projecting lens is decreased.