Patent ID: 6733137
Filing Date: 2004-05-11
Classification: H04N

Abstract:
A digital mirror device projector comprising:a light source; a color wheel configured by combining a plurality of kinds of color filters for making image light of a plurality of colors; a digital mirror device panel having a plurality of mirror elements each being controlled so as to be put in a first inclination state and in a second inclination state and reflecting light fed from said light source and passed through any one of said color filters making up said color wheel while being put in said first inclination state, as said image light, in a first direction and reflecting light fed from said light source and passed through any one of said color filters making up said color wheel while being put in said second inclination state in a second direction being different from said first direction; a driving unit to control so as to put each of said mirror elements in said digital mirror device panel in said first inclination state or said second inclination state according to a corresponding video signal and a revolution state of said color wheel; a photoelectric conversion device being placed as a photosensor in such a position where light reflected from at least one of said mirror elements is incident when said at least one of said mirror elements is in said second inclination state and, whereby said photoelectric conversion device receives said reflected light and converts the received light to a voltage; a correcting unit to receive a video signal and said voltage obtained by said photoelectric conversion device, to correct said video signal, based on the received voltage and to output the corrected video signal to said driving unit.