DRIVING DEVICE FOR CAPACITANCE TYPE ACTUATOR AND DRIVING DEVICE FOR INK JET HEAD

摘要

An actuator is sequentially charged with output voltage “E/2” of a voltage source and output voltage “E” of a voltage source. After the charging, “Q/2” of electric charge “Q” stored in the actuator is discharged on a path returning to the voltage source. Subsequent to the discharging, the remaining all electric charge “Q/2” stored in the actuator is discharged on a closed circuit.

主权项

1. A driving circuit for a capacitive actuator, comprising:
a voltage source which applies a driving voltage to the capacitive actuator; a plurality of switches connected between the voltage source and the capacitive actuator and forming a current path for charging/discharging the capacitive actuator; and an adjustment section which adjusts an ON resistance of a switch that is turned on when discharging in a direction of returning electrical charge in the capacitive actuator to the voltage source.