Driving device and liquid ejecting apparatus

A liquid ejection system, comprising:

• a controller;
• a drive circuit connected to the controller;
• and
• a liquid ejection head including a plurality of nozzles associated with a plurality of liquid ejecting elements connected to the drive circuit, wherein
• the controller is configured to apply a multi-droplet waveform to each liquid ejecting element via the drive circuit, each multi-droplet waveform being one of a plurality of preset patterns in which each droplet waveform in the multi-droplet waveform is one of a reference ejection waveform or a minute adjustment waveform,
• the reference ejection waveform causes a droplet of a nominal reference volume to be ejected by the liquid ejecting element,
• the minute adjustment waveform causes a droplet of less than the nominal reference volume to be ejected by the liquid ejecting element in variable volume increments,
• wherein the controller is configured to select a multi-droplet waveform for each of the plurality of liquid ejecting elements, respectively, based on print data, and
• wherein the controller is further configured to adjust the pulse width of the expansion pulse of at least one minute adjustment waveform in the multi-droplet waveform selected for at least one liquid ejecting element in the plurality of liquid ejecting elements based on adjustment data stored in the controller.

A liquid ejecting apparatus, comprising:

• a driving device;
• and
• a liquid ejecting head connected to the driving device configured to eject a liquid, wherein
• the driving device includes:
• a control unit configured to apply a multi-droplet waveform to a liquid ejecting element, the multi-droplet waveform being one of a plurality of preset patterns in which each droplet waveform in the multi-droplet waveform is one of a reference ejection waveform or a minute adjustment waveform,
• the reference ejection waveform causes a droplet of a nominal reference volume to be ejected by the liquid ejecting element,
• the minute adjustment waveform causes a droplet of less than the nominal reference volume to be ejected by the liquid ejecting element in variable volume increments,
• wherein the control unit is configured to apply multi-droplet waveforms to each of a plurality of liquid ejecting elements,
• wherein the control unit is configured to select a multi-droplet waveform for each of the plurality of liquid ejecting elements, respectively, based on print data, and
• wherein the control unit is further configured to adjust the pulse width of the expansion pulse of at least one minute adjustment waveform in the multi-droplet waveform selected for at least one liquid ejecting element in the plurality of liquid ejecting elements based on adjustment data.