Patent ID: 6969138

Claim:
An ink jet recording apparatus, comprising a head assembly section provided with a plurality of nozzles and a plurality of pressure chambers storing ink therein and communicated respectively to the nozzles, a plurality of pressure application means for applying a pressure on the ink in the respective pressure chambers so as to discharge ink droplets through the nozzles onto a recording medium, and driving pulse supply means for supplying, to the pressure application means, a driving pulse for driving the pressure application means, wherein: the nozzles include at least a first nozzle and a second nozzle that are arranged in a direction perpendicular to a relative movement direction in which the head assembly section is relatively moved with respect to the recording medium while discharging ink; the driving pulse supply means selectively supplies a first driving pulse and a second driving pulse, the first driving pulse including a preliminary pulse for vibrating an ink meniscus in a tip portion of the nozzle and a discharge pulse for discharging an ink droplet through the nozzle in this order, and the second driving pulse including the discharge pulse; and the driving pulse supply means supplies the first driving pulse to the pressure application means corresponding to the first nozzle while supplying the second driving pulse to the pressure application means corresponding to the second nozzle, so that a direction in which the ink droplet is discharged from the first nozzle is different from a direction in which the ink droplet is discharged from the second nozzle.