Patent ID: 7391222

Claim:
A deflector comprising: a movable plate; a fixed portion; a pair of elastic members which pivotably support the movable plate with respect to the fixed portion; a drive coil provided on the movable plate; a magnetic flux generator which generates a magnetic flux which acts in the drive coil; an angle detector which outputs an angle of oscillation of the movable plate as a change of electrical characteristics, the angle detector detects the angle of oscillation of the movable plate based on an electrostatic capacitance between a first electrode on the movable plate and a second electrode provided facing the first electrode; a connecting portion which electrically connects on the movable plate a first end out of two ends of the drive coil and one end of an electric terminal of the angle detector, the connecting portion connects the first electrode and the first end of the drive coil; a first wire which is drawn from the connecting portion up to the fixed portion via the elastic member; and a circuit which generates and applies a signal to the connecting portion, the signal is generated based upon adding a reference signal used for a detection of the electrostatic capacitance and a driving signal applied to the drive coil so as to oscillate the movable plate.