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 (V1-V9),
a plurality of condensers (2a-i) to which the voltages (V1-V9)
are respectively charged as terminal voltages, and a switch (7) for switching
connections between the capacitive load (11) and the condensers (2a-i),
the switch (7) sequentially connecting the condensers (2a-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 (2a-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.