Patent ID: 7417609

Claim:
A method of operating a display system that comprises an array of micromirrors, each micromirror comprising a mirror plate and an electrode for rotating the mirror plate, the method comprising: directing a light beam onto the micromirror array; and selectively reflecting the light beam into an optical element for producing an image or a video frame on a display target, which further comprises: selecting one or more micromirrors from the micromirror array according to a gray scale of the image or the video frame; applying a first voltage to the mirror plate and a second voltage to the electrode of the selected micromirror such that voltage difference between the mirror plate and the electrode drives the mirror plate to rotate to one of the ON state and OFF state of the micromirror relative to the substrate at one time; and applying a third voltage to the mirror plate, and a fourth voltage to the electrode of the selected micromirror such that the voltage difference between the mirror plate and the electrode drives the mirror plate to rotate relative to the substrate, wherein difference between the third voltage and the fourth voltage has an opposite polarity to that between the first voltage and the second voltage.