Patent ID: 7257286

Claim:
A dual comb electrode structure, comprising: a mirror unit capable of reflecting light; a plurality of movable comb electrodes protruding from either side of the mirror unit; a plurality of upper and lower static comb electrodes, wherein the plurality of upper static comb electrodes are above the plurality of movable comb electrode when no voltage is applied to the plurality of upper static comb electrodes, the plurality of lower static comb electrodes, or the plurality of movable comb electrodes, and, wherein the plurality of lower static comb electrodes are below the plurality of movable comb electrode when no voltage is applied to the plurality of upper static comb electrodes, the plurality of lower static comb electrodes, or the plurality of movable comb electrodes, wherein a spacing between the upper static comb electrodes and the plurality of movable comb electrodes is different from a spacing between the lower static comb electrodes and the movable comb electrodes when no voltage is applied to the plurality of upper static comb electrodes, the plurality of lower static comb electrodes.