Patent ID: 8132897

Claim:
A liquid-droplet jetting apparatus which jets droplets of a liquid, comprising: a liquid-droplet jetting head including; a cavity unit in which a plurality of pressure chambers arranged regularly are formed; and a piezoelectric actuator which is joined to the cavity unit to cover the pressure chambers and which jets the liquid in the pressure chambers selectively, the piezoelectric actuator having: first active portions each corresponding to a center portion of one of the pressure chambers; and second active portions each corresponding to an outer peripheral portion, of one of the pressure chambers, which covers a portion located outside of the center portion of one of the pressure chambers; and a voltage application mechanism which applies a voltage to the piezoelectric actuator; wherein the first active portions and the second active portions expand in a first direction toward the pressure chambers and contract in a second direction orthogonal to the first direction when the voltage is applied to the first and second active portions by the voltage application mechanism; and wherein the voltage application mechanism does not apply a second voltage to the second active portions when a first voltage is applied to the first active portions, and the voltage application mechanism applies the second voltage to the second active portions when the first voltage is not applied to the first active portions.