Storage medium and control program of the driving device driving method of the piezoelectric actuator, the drive of the piezoelectric actuator, electronic watch, electronic equipment, of the piezoelectric actuator

摘要

And a driving device for a piezoelectric actuator to reduce the power consumption by reducing the time until the high-efficient drive condition, can perform stable control. Phase difference detection means for detecting a detection signal of longitudinal vibration and bending vibration from the vibrator 5, to detect a phase difference between these two signals - (phase-difference voltage converting circuit 51), detected by the phase difference detection means while comparing the phase difference reference value and the phase difference that is, the frequency control means 52 to 56 for controlling the frequency of the drive signal supplied to the piezoelectric element 17 on the basis of the comparison result, the amplitude of the detection signal of the piezoelectric element 17 I and an (amplitude detection circuit 57) amplitude detecting means for detecting. Is compared with the amplitude reference value and the amplitude, the frequency control means controls the frequency of the drive signal based on the comparison result.