Patent ID: 8333460

Claim:
A droplet ejecting apparatus, comprising: a droplet ejecting head including a cavity unit in which a plurality of pressure chambers are arranged and a piezoelectric actuator which is superposed on the cavity unit and which permits a liquid in the pressure chambers to be ejected therefrom as a droplet; a voltage application device configured to apply a voltage to the piezoelectric actuator; wherein the piezoelectric actuator includes: (a) a plurality of first active portions each of which is provided so as to correspond to a central portion of a corresponding one of the pressure chambers; (b) a plurality of second active portions each of which corresponds to a portion of the cavity unit that is located outside of the central portion of the corresponding one of the pressure chambers; (c) a first potential electrode which has a comb-like shape and which includes a plurality of first branch portions provided so as to respectively correspond to the plurality of first active portions and a first trunk portion that connects the plurality of first branch portions, the first potential electrode being constantly given a first potential by the voltage application device; (d) a second potential electrode which has a comb-like shape and which includes a plurality of second branch portions provided so as to respectively correspond to the plurality of second active portions and a second trunk portion that connects the plurality of second branch portions, the second potential electrode being constantly given a second potential that is different from the first potential by the voltage application device; and (e) a plurality of individual electrodes each of which is provided so as to correspond to one of the plurality of first active portions and at least one of the plurality of second active portions and to which the first potential and the second potential are selectively given at a connection portion thereof by the voltage application device; and wherein the connection portion of each of the plurality of individual electrodes is disposed so as to overlap the second trunk portion of the second potential electrode as seen in a superposition direction in which the cavity unit and the actuator ate superposed.