Patent ID: 7891750

Claim:
An ink-droplet ejecting apparatus which ejects a plurality of ink droplets of an ink to form one dot onto a recording medium, comprising: a pressure chamber in which the ink is filled; an actuator which faces the pressure chamber, and which changes a volume of the pressure chamber, according to a driving pulse signal for ejecting the ink droplets to form one dot; and a signal control unit which supplies the driving pulse signal to the actuator; wherein the driving pulse signal includes a plurality of main pulses which are successive with intervals to eject the ink droplets, and a stabilizing pulse which is inserted between the main pulses, and which suppresses a residual vibration of the ink, in the pressure chamber, generated by one of the main pulses applied before the stabilizing pulse; and a last main pulse, among the main pulses, is adjusted to suppress the residual vibration of the ink in the pressure chamber, generated by a main pulse applied before the last main pulse, and to prevent vibration generated by the last main pulse from remaining.