Inkjet head driving method and inkjet recording apparatus

An inkjet recording apparatus comprising:

• an inkjet head configured to be capable of ejecting ink droplets from a nozzle in which change in pressure is applied to ink in a pressure chamber by deforming a piezoelectric element according to an application of a voltage signal of a unit drive waveform including one or more pulse waveforms;
• and
• a drive controller that controls a voltage signal applied to the piezoelectric element,
• wherein,
• the drive controller applies to the piezoelectric element, a voltage signal of a composite drive waveform including a plurality of the unit drive waveforms to eject from the nozzle a plurality of the ink droplets landing on a recording medium in a combined state,
• the composite drive waveform includes at least four pulse waveforms within 4 AL from a start of applying the first pulse waveform,
• the composite drive waveform includes a first unit drive waveform and a second unit drive waveform that is applied at the end of the composite drive waveform and that causes the ink droplet to be ejected at a higher speed than the first unit drive waveform, and
• the ink contains an alcohol having a carbon number of 1 or more and 4 or less in a range of 20% by mass or more and 50% by mass or less relative to an entirety of the ink.