Liquid ejection device, control method for controlling liquid ejection device, and computer readable medium

A control method for controlling a liquid ejection device including:

• a first nozzle row, a second nozzle row, a third nozzle row, and a fourth nozzle row each of which is a nozzle row including a plurality of nozzles arranged in a first direction;
• a moving mechanism configured to move one of the plurality of nozzles and a recording medium with respect to the other of the plurality of nozzles and the recording medium in a second direction intersecting the first direction;
• a plurality of elements each of which is configured to apply ejection energy for ejecting liquid from corresponding one of the plurality of nozzles;
• and a drive circuit configured to supply driving signals to the plurality of elements, the driving signals being based on waveform signals, the plurality of nozzles of the first nozzle row overlapping the plurality of nozzles of the third nozzle row in the second direction, and the plurality of nozzles of the second nozzle row not overlapping the plurality of nozzles of the first nozzle row in the second direction, and overlapping the plurality of nozzles of the fourth nozzle row in the second direction, the control method comprising:
• supplying, to the drive circuit, the waveform signals for the nozzles overlapping in the second direction in the first nozzle row and the third nozzle row and in which start timings of ejection cycles are different from each other and the ejection cycles overlap each other, so as to alternately arrange, in the second direction on the recording medium, dots of liquid ejected from the nozzles overlapping in the second direction in the first nozzle row and the third nozzle row;
• supplying, to the drive circuit, the waveform signals for the nozzles overlapping in the second direction in the second nozzle row and the fourth nozzle row and in which start timings of ejection cycles are different from each other and the ejection cycles overlap each other, so as to alternately arrange, in the second direction on the recording medium, dots of liquid ejected from the nozzles overlapping in the second direction in the second nozzle row and the fourth nozzle row, wherein a start timing of an ejection cycle coincides with a start time of a respective waveform signal for a respective row, per ejection cycle;
• and
• alternately arranging, in a direction crossing the second direction, a set of dots of the liquid ejected from the nozzles overlapping in the second direction in the first nozzle row and the third nozzle row and a set of dots of the liquid ejected from the nozzles overlapping in the second direction in the second nozzle row and the fourth nozzle row.

A non-transitory computer readable medium storing a program causing a controller of a liquid ejection device to execute a process, the liquid ejection device including:

• a first nozzle row, a second nozzle row, a third nozzle row, and a fourth nozzle row each of which is a nozzle row including a plurality of nozzles arranged in a first direction;
• a moving mechanism configured to move one of the plurality of nozzles and a recording medium with respect to the other of the plurality of nozzles and the recording medium in a second direction intersecting the first direction;
• a plurality of elements each of which is configured to apply ejection energy for ejecting liquid from corresponding one of the plurality of nozzles;
• a drive circuit configured to supply driving signals to the plurality of elements;
• and the controller, the driving signals being based on waveform signals, the plurality of nozzles of the first nozzle row overlapping the plurality of nozzles of the third nozzle row in the second direction, and the plurality of nozzles of the second nozzle row not overlapping the plurality of nozzles of the first nozzle row in the second direction, and overlapping the plurality of nozzles of the fourth nozzle row in the second direction, wherein the process includes:
• supplying, to the drive circuit, the waveform signals for the nozzles overlapping in the second direction in the first nozzle row and the third nozzle row and in which start timings of ejection cycles are different from each other and the ejection cycles overlap each other, so as to alternately arrange, in the second direction on the recording medium, dots of liquid ejected from the nozzles overlapping in the second direction in the first nozzle row and the third nozzle row;
• supplying, to the drive circuit, the waveform signals for the nozzles overlapping in the second direction in the second nozzle row and the fourth nozzle row and in which start timings of ejection cycles are different from each other and the ejection cycles overlap each other, so as to alternately arrange, in the second direction on the recording medium, dots of liquid ejected from the nozzles overlapping in the second direction in the second nozzle row and the fourth nozzle row, wherein a start timing of an ejection cycle coincides with a start time of a respective waveform signal for a respective row, per ejection cycle;
• and
• alternately arranging, in a direction crossing the second direction, a set of dots of the liquid ejected from the nozzles overlapping in the second direction in the first nozzle row and the third nozzle row and a set of dots of the liquid ejected from the nozzles overlapping in the second direction in the second nozzle row and the fourth nozzle row.