Patent ID: 7213921

Claim:
A color display device, comprising: an illumination lens system for converting a plurality of light beams, which are output from a plurality of light sources, into linear parallel light beams; a diffractive light modulation system for producing a plurality of diffracted light beams having a plurality of diffraction orders by modulating each of the plurality of parallel light beams that are almost perpendicularly incident from the illumination lens system; a combining system for focusing the plurality of diffracted light beams having the plurality of diffraction orders, which are incident from the diffractive light modulation system; a Fourier filter system for selecting diffracted light beams having desired diffraction orders from among the plurality of diffracted light beams focused by the combining system, using a dichroic filter; and a projection system for focusing the diffracted light beams, which are selected by the Fourier filter system, on an object, and allowing the focused diffracted light beams to scan the object.