Patent ID: 7154458

Claim:
A video display device comprising: a red color light source to emit red color light; a green color light source to emit green color light; a blue color light source to emit blue color light; at least one spatial light modulator to spatially modulate, according to a video signal for a red color, a video signal for a green color, and a video signal for a blue color, said light fed from said red color light source, said light fed from said green color light source, and said light fed from said blue color light source; a selection controller to select a combination of a video signal for controlling said spatial light modulator and said light to be modulated; and a light quantity controller to control a time mean value of luminous flux of light to be modulated by said spatial light modulator, wherein said spatial light modulator spatially modulates said red color light according to said video signal of a red color and at least one of said video signals of a green color and a blue color, said green color light according to said video signal of a green color and at least one of said video signals of a blue color and a red color, and said blue color light according to said video signal of a blue color and at least one of said video signals of a red color and a green color.