Patent ID: 7436574

Claim:
A two-axis driving optical scanner comprising: a substrate; a stage separated from the substrate to a predetermined height and driven in a first direction with respect to a center axis in a second direction perpendicular to the first direction; a first support portion including first torsion springs extending in the second direction from both sides of the stage and a rectangular motion frame having a pair of first portions parallel to each other and respectively connected to the first torsion springs and a pair of second portions parallel to each other and extending in the second direction; a stage driving portion including a plurality of first fixed comb electrodes and a plurality of first driving comb electrodes formed on inner sidewalls of the second portions and sides of the stage facing the inner sidewalls of the second portions, respectively, said stage driving portion being adapted to generate a seesaw motion of the stage in the first direction at a first frequency; a second support portion including second torsion springs extending in the first direction from the second portions and fixing the second torsion springs to the substrate; a motion frame driving portion including a plurality of second driving comb electrodes provided at outer sidewalls of the first portions and a plurality of second fixed comb electrodes fixed to correspond to the second driving comb electrodes to generate a seesaw motion of the motion frame in the second direction at a second frequency; at least one driving comb electrode for tuning formed on a lower surface of the stage to a predetermined height in the second direction; and at least one fixed comb electrode for tuning formed on a surface of the substrate to a predetermined height to be alternate with the driving comb electrode for tuning.