Patent ID: 7978388
Filing Date: 2011-07-12
Classification: G02B

Abstract:
1. A mirror device characterized by comprising: a mirror rotatably supported by an upper substrate; a first electrode which is formed on a lower substrate opposing said upper substrate to be spaced apart therefrom by a predetermined gap, and controls a tilt angle of said mirror; a collision preventive structure which is provided to said mirror and prevents collision of said mirror with said first electrode when said mirror rotates; said mirror device further comprises a gimbal, having the same electric potential as that of said mirror, which is supported to be rotatable with respect to said upper substrate and includes an inner opening for rotatably supporting said mirror therein; and said upper substrate being disposed in parallel with said lower substrate, wherein a distance from a straight line passing a rotation center of said gimbal and perpendicular to a direction parallel to the lower substrate to an edge of said gimbal at a maximum angle of rotation thereof is larger than a distance from the straight line to a distal end of said first electrode.