Patent ID: 8018294

Claim:
An oscillator device, comprising: an oscillation system having a first oscillator and an elastic supporting member; a detecting member configured to detect an oscillation amplitude of said first oscillator; a driving member configured to drive said first oscillator; and a control unit configured to generate a driving signal for driving said first oscillator and to supply the driving signal to said driving member, wherein said control unit (i) reciprocally sweeps a driving frequency of the driving signal so that a resonance frequency of said oscillation system is included within a swept frequency range, (ii) determines a resonance frequency based on at least a frequency providing a maximum oscillation amplitude value in a frequency-increasing forward stroke of the reciprocal sweep and a frequency providing a maximum oscillation amplitude value in a frequency-decreasing backward stroke of the reciprocal sweep, and (iii) generates the driving signal based on the determined resonance frequency.