Inkjet recording apparatus

An inkjet recording apparatus comprising:

• a recording head including a plurality of nozzles configured to eject ink onto a recording medium;
• and
• a head driving section configured to cause the recording head to eject the ink the number of times determined according to a gradation value of each of a plurality of pieces of pixel data constituting image data to be printed, wherein
• the recording head includes
• a plurality of pressure chambers in communication with the respective nozzles and configured to contain ink inside, and
• a plurality of piezoelectric elements disposed in correspondence with the respective pressure chambers and each configured to cause the ink to be ejected from the corresponding pressure chamber to the corresponding nozzle, and
• the head driving section includes
• a drive pulse generator configured to generate, as a waveform of drive voltage to be applied to the piezoelectric elements, a plurality of drive waveforms including an ink-ejection drive waveform defined according to the number of times of ink ejection to be made from the corresponding nozzle, and a reset waveform which causes greater drawing of a meniscus in the corresponding nozzle than by the ink-ejection drive waveform, and
• a selector configured to select, for each of the nozzles, to apply one of the drive waveforms generated by the drive pulse generator or not to apply any of the drive waveforms to the corresponding piezoelectric element, and
• the reset waveform is a waveform in which the ink-ejection drive waveform is followed by a pulse having a narrower pulse width than ½ of a natural oscillation period of the recording head.