Patent ID: 8526130

Claim:
An oscillating actuator drive unit comprising: an oscillator unit that generates an oscillating signal having a first frequency; an amplifier unit that amplifies the oscillating signal based on a first amplification factor and generates a first amplified oscillating signal as a driving signal for driving an oscillating actuator; a voltage detecting unit that detects a first voltage associated with the first amplified oscillating signal; a signal control unit that receives the first voltage from the voltage detecting unit and computes a second amplification factor with reference to at least the first voltage, the signal control unit supplying the second amplification factor to the amplifier unit to allow the amplifier unit to amplify the oscillating signal based on the second amplification factor, the amplified oscillating signal having a second voltage, the second voltage being closer to a target voltage than the first voltage; and a temperature detecting unit that detects an ambient temperature of the oscillating actuator, wherein the signal control unit adjusts the frequency of the oscillating signal that is generated by the oscillator unit so as to be decreased when the ambient temperature is greater than a predetermined temperature, and adjusts the frequency of the oscillating signal that is generated by the oscillator unit so as to be increased when the ambient temperature is smaller than the predetermined temperature.