Patent ID: 7355797

Claim:
A display device, comprising: a condenser unit for converging polarized light output from a plurality of light sources, and outputting the converged polarized light; an illumination lens system for converting the polarized light, which is output from the condenser unit, into linear parallel light; a plurality of diffractive light modulators for producing diffracted light beams having a plurality of diffraction orders by optically modulating the polarized light; a mirror for separating illumination light and diffracted light, the mirror passing the polarized light, which is output from the illumination lens system, the mirror reflecting the diffracted light beams, which are output from the diffractive light modulators, toward a filter system; a polarized beam separator for separating the polarized light, which is output from the mirror for separating illumination light from diffracted light, and then allowing the separated beams to be incident on the diffractive light modulators, and converging the diffracted light beams output from the plurality of the diffractive light modulators and then outputting the converged light to the mirror for separating illumination light from diffracted light; the filter system for selecting the diffracted light beams having desired diffraction orders from among the diffracted light beams, which are output from the diffractive light modulators, using a spatial filter; and a projection system for focusing the diffracted light beams selected by the filter system, and projecting the focused light beams onto a display.