Patent ID: 6574046
Filing Date: 2003-06-03
Classification: G02F,H04N

Abstract:
A time-division image projector, comprising:a light source that radiates white light; a transmission color wheel, in which are mounted a plurality of transmission color filters that each transmit only light of specific wavelength bands, and that selectively transmit only light of said specific wavelength bands of said white light from said light source; a reflection element formed at a predetermined angle, for which the normal of the reflecting surface is arranged at an inclination with respect to light that is irradiated into said transmission color wheel, and that reflects light of said specific wavelength bands that is transmitted by said transmission color filters in a different direction; an optical modulation element that is supplied, in time divisions, with a plurality of image signals that each correspond to light of a respective one of said specific wavelength bands that has been reflected by said reflection element and that modulates, in pixel units, the intensity of light of said specific wavelength bands according to said plurality of image signals; a projection lens that projects the light that is emitted from said optical modulation element; a motor that is linked with an axis of rotation of said transmission color wheel and that causes said transmission color wheel to rotate in synchronism with image signals; a projection lens that projects the light that is emitted from said reflective optical modulation element; and a motor that is linked with the axis of rotation of said transmission color wheel and that causes said transmission color wheel to rotate in synchronism with the timing of supply of said plurality of image signals that correspond to light of said specific wavelength bands.