Patent ID: 7669987

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 for causing ink to be ejected, and piezoelectric actuators that form side walls isolating the pressure chambers and are caused to deflect so as to vary a volume of the pressure chamber from which ink is to be ejected according to drive signals applied between a first electrode associated with the pressure chamber from which ink is to be ejected and two electrodes adjacent to the first electrode; and a drive signal generator, for driving the pressure chambers so as to concurrently eject ink droplets from every N pressure chambers, the drive signal generator configured to supply a deflection-preventing signal to an outmost actuator among (N+l) actuators closely disposed with the center of a pressure chamber caused to have ink ejected, to at least one of two electrodes sandwiching the outmost actuator, the deflection-preventing signal producing an electric potential difference between the two electrodes, where N=2M+1 and M>1, wherein the electric potential difference produced by the deflection-prevention signal provides the outmost actuator with a force that counteracts a force that tends to make the outmost actuator deflect due to exertion of ink pressure by the ink ejecting pressure chamber.