Color display apparatus using one panel diffractive-type optical modulator

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 converting the light beams, which are emitted from the plurality of light sources, into linear parallel light and causing the converted light to enter;
• a diffractive optical modulator comprising a substrate, a plurality of first reflection parts arranged to form an array, configured such that center portions of the plurality of first reflection parts are spaced apart from the substrate and have one or more open holes so that surfaces of the plurality of first reflection parts oppose the substrate reflect incident light and the incident light is passed therethrough, and configured to be supported by the substrate, a second reflection part configured to be located between the first reflection parts and the substrate, to be spaced apart from the first reflection parts, and to reflect incident light that passes through one or more open holes of the first reflection parts, and actuating means for moving the center portions of the plurality of reflection parts so as to vary distances to the second reflection parts and varying an amount of diffractive light formed by reflective light of the first and second reflection parts, the diffractive optical modulator forming diffractive light by diffracting incident light when locations of at least two neighboring first reflection parts vary to a predetermined distance with respect to those of the second reflection parts by the actuating means, and emitting diffractive light having a plurality of wavelengths by allowing the plurality of first reflective unit to generate and emit diffractive light for incident light of assigned wavelengths when wavelengths of the incident light to have to be modulated by the plurality of first reflective units are assigned and linear parallel light having different wavelengths enters simultaneously;
• a filter system for passing diffractive light having a desired diffractive order for respective wavelengths 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.