Patent ID: 7367658

Claim:
An ink jet recording apparatus comprising: an ink jet recording head having a plurality of nozzles from each of which ink is ejected, a plurality of pressure chambers communicating with the respective nozzles, ink supplying means for supplying ink to the respective pressure chambers, a plurality of electrodes provided relative to the respective pressure chambers, and actuators each of which forms a side wall isolating the respective pressure chambers and is caused to deflect so as to vary a volume of the pressure chamber from which ink is to be ejected according to drive signals that are applied between one electrode relative to a pressure chamber from which ink is ejected and the electrodes relative to the two pressure chambers adjacent to the former; and drive signal generating means for generating drive signals that enables time-divisional driving so that ink droplets are concurrently ejected from every N pressure chambers, where N=2M (M≧2), and supplying the drive signals to electrodes relative to the respective pressure chambers, wherein said drive signal generating means supplies to an electrode relative to at least outmost pressure chamber among (N−1) pressure chambers closely disposed with the center on a pressure chamber from which ink is made not to be ejected at a timing when the ink ejection is enabled, such a drive signal that makes a magnitude of deflection of an outmost actuator among N actuators close around a pressure chamber from which ink is made not to be ejected at a timing when the ink ejection is enabled in the time-divisional driving operation substantially conform to a magnitude of deflection of an outmost actuator (or actuators) among N actuators disposed close around a pressure chamber from which ink is made to be ejected.