Method for controlling driving of inkjet head, and inkjet recording apparatus

An inkjet recording apparatus, comprising:

• an inkjet head including a plurality of recording elements each including a nozzle through which ink is ejected and a driving element that applies a pressure fluctuation to ink supplied to the nozzle according to an applied driving pulse;
• and
• a hardware processor that controls an output of the driving pulse applied to the driving element to each of the recording elements,
• wherein each recording element of the plurality of recording elements has a reference pulse width of the driving pulse that maximizes a predetermined characteristic value related to ink droplets ejected by the each recording element according to the driving pulse applied to the each driving element with respect to a change in pulse width of the driving pulse, and the reference pulse widths for the plurality of recording elements have a variation equal to or greater than a predetermined standard,
• the hardware processor is configured to set a predetermined number of driving pulses that are combined to eject respective ink droplets that are made to land in the same pixel range, the predetermined number of driving pulses including a first driving pulse having a pulse width longer than a representative reference pulse width of the reference pulse widths of the plurality of recording elements and a second driving pulse having a pulse width shorter than the representative reference pulse width, and output the predetermined number of driving pulses to each of the plurality of recording elements;
• and
• the hardware processor is configured to determine an order of the first driving pulse and the second driving pulse based on sensitivities of the plurality of recording elements and the reference pulse widths of the plurality of recording elements.