An apparatus and method for driving an image display device using a DMD
are provided. The apparatus includes a color wheel, an optical sensor, a
delay time determining unit, and a control unit. The color wheel includes
a plurality of color filters and index marks formed at positions
corresponding to boundary lines between the color filters, and the
optical sensor detects the index marks during rotation of the color wheel
and outputs detection signals. The delay time determining unit determines
a delay time corresponding to a minimum margin required in a conversion
of a color image signal according to the detection signal inputted from
the optical sensor, and the control unit controls a DMD based on the
detection signals and the delay time.