Patent ID: 7486286

Claim:
A capacitive load charge-discharge device, comprising: plural types of constant voltage sources having different output potentials; and a capacitive load whose charging-discharging is performed by the plural types of constant voltage sources, the capacitive load charge-discharge device performing the charging-discharging by connecting one of the constant voltage sources as a high voltage source to a first voltage application terminal of the capacitive load and connecting one of the constant voltage sources as a low voltage source to a second voltage application terminal of the capacitive load, wherein: the constant voltage sources serve as at least either positive voltage sources serving as sink-current-flowing voltage sources or negative voltage sources serving as source-current-flowing voltage sources, and when the constant voltage sources serve as the sink-current-flowing voltage sources, each of the sink-current-flowing voltage sources includes stored energy adjusting means which at least discharges energy stored therein so that the energy leans toward a negative side, and when the constant voltage sources serve as the source-current-flowing voltage sources, each of the source-current-flowing voltage sources includes the stored energy adjusting means which at least replenishes the energy stored therein so that the energy leans toward a positive side.