| 摘要 |
A capacitive load driving circuit ( 1 ) for charging and discharging a capacitive load ( 11 ) is provided with a voltage divider ( 5 ) for dividing a power supply voltage (VH) into a plurality of different voltages (V 1 -V 9 ), a plurality of condensers ( 2 a-i) to which the voltages (V 1 -V 9 ) are respectively charged as terminal voltages, and a switch ( 7 ) for switching connections between the capacitive load ( 11 ) and the condensers ( 2 a-i), the switch ( 7 ) sequentially connecting the condensers ( 2 a-i) in an ascending order of the terminal voltages so that electrostatic energy is supplied to the capacitive load ( 11 ) when the capacitive load ( 11 ) is charged, the switch ( 7 ) sequentially connecting the condensers ( 2 a-i) in a descending order of the terminal voltages so that electrostatic energy is collected from the capacitive load ( 11 ) when the capacitive load ( 11 ) is discharged. With this, it is possible to provide a capacitive load drive circuit having a simple circuit configuration and capable of efficiently collecting and reusing energy accumulated in the capacitive load, and a capacitive load driving method.
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