Patent ID: 7248408

Claim:
A color display apparatus using a one-panel diffractive optical modulator, comprising: a plurality of light sources for simultaneously emitting light beams of corresponding wavelengths; an illumination lens system for allowing respective light beams, which are emitted from the plurality of light sources, to be converted into linear parallel light and simultaneously enter; a diffractive optical modulator comprising a substrate, a plurality of reflecting parts arranged to form an array, configured such that center portions of the plurality of reflection parts are spaced apart from the substrate and surfaces of the plurality of reflection parts oppose the substrate reflect incident light, and configured to be supported by the substrate, and actuating means for moving the center portions of the plurality of reflection parts so as to become away from or approach the substrate, the diffractive optical modulator forming diffractive light by diffracting incident light when locations of at least two neighboring reflection parts vary to a predetermined distance by the actuating means, and the reflecting parts simultaneously emitting diffractive light having a plurality of wavelengths by allowing the plurality of reflective units to generate and emit diffractive light for incident light of respective assigned wavelengths when wavelengths of the incident light to have to be modulated by the plurality of reflective units are assigned and linear parallel light having different wavelengths different enters simultaneously; a filter system for allowing diffractive light having a desired diffractive order for respective wavelengths to pass therethrough when diffractive light having a plurality of diffractive orders for the respective wavelengths enters from the diffractive optical modulator; and a projection system for generating an image on a target object by scanning diffractive light filtered by the filter system on the target object.