Patent ID: 7015649

Claim:
A capacitive-load drive apparatus comprising: a first power supply; a second power supply; a first oscillation-transition-voltage-generation device which is connected between said first power supply and a capacitive load; a second oscillation-transition-voltage-generation device which is connected between said second power supply and said capacitive load; and a voltage-fluctuation-detection device which outputs a detection signal when said first power supply voltage or said second power supply voltage fluctuates outside a specified range; wherein said first oscillation-transition-voltage-generation device comprises a first switch device and a first inductance and moves a voltage of said capacitive load between a reference voltage and a first voltage by oscillation of said first inductance and said capacitive load; wherein said second oscillation-transition-voltage-generation device comprises a second switch device and a second inductance and moves the voltage of said capacitive load between said first voltage and a second voltage by oscillation of said second inductance and said capacitive load; and wherein said first voltage is larger than said reference voltage, and said second voltage is larger than said first voltage.