Patent ID: 7961161

Claim:
A display system, comprising: a spatial light modulator projecting an image to be displayed using modulations depending on an ON state, an OFF state, and an oscillating state of a plurality of micromirrors; and a control device controlling said spatial light modulator, wherein a luminance of projected image obtained by modulation of said oscillating state controlled during a period T by a control signal from said control device is 1/n of a luminance Lon of projected image obtained by modulation of said ON state controlled during said period T, wherein T is longer than one oscillation period of said micromirrors; luminance Losc of projected image obtained by the modulation of said oscillating state in one frame period of said image is calculated by following equation Losc=Lon×(1 /n )×(Tosc/ T ) with respect to time Tosc in which said oscillation state is performed; and 1/n is smaller than 0.75 n is an integer; Lon is defined as full light luminance; Tosc is defined as modulation time.