| CPC B41J 2/04536 (2013.01) [B41J 2/04586 (2013.01)] | 14 Claims |
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1. A liquid ejection apparatus comprising:
a head including at least a first nozzle array, a second nozzle array, a third nozzle array and a fourth nozzle array, the first nozzle array including nozzles arranged at a particular pitch in a first direction, the second nozzle array including nozzles arranged at the particular pitch in the first direction, the nozzles in the second nozzle array being located at positions shifted from the nozzles in the first nozzle array in the first direction, the third nozzle array including nozzles arranged at the particular pitch in the first direction, the fourth nozzle array including nozzles arranged at the particular pitch in the first direction, the nozzles in the third nozzle array being located at positions shifted from the nozzles in the first nozzle array and the second nozzle array in the first direction, the nozzles in the fourth nozzle array being located at positions shifted from the nozzles in the first nozzle array, the second nozzle array, and the third nozzle array in the first direction;
a carriage on which the head is mounted, the carriage being configured to move in a second direction crossing the first direction;
a memory; and
a controller configured to:
acquire ejection control data, the ejection control data being generated based on image data for one line of an image to be formed, the ejection control data including first data and second data, the first data indicating an amount of liquid ejected from a first nozzle in the first nozzle array, the second data indicating an amount of liquid ejected from a second nozzle in the second nozzle array, the second nozzle being located at a position shifted from the first nozzle in the first direction, the second nozzle being closest to the first nozzle among the nozzles in the second nozzle array, the ejection control data being generated by distributing a plurality of data included in the image data for one line into the first data and the second data alternately in an arrangement order of the plurality of data;
acquire second ejection control data, the second ejection control data being generated based on image data for second one line of the image to be formed, the second ejection control data including third data and fourth data, the third data indicating an amount of liquid ejected from a third nozzle in the third nozzle array, the fourth data indicating an amount of liquid ejected from a fourth nozzle in the fourth nozzle array, the third nozzle being located at a position shifted from the second nozzle in the first direction, the third nozzle being closest to the second nozzle among the nozzles in the third nozzle array, the fourth nozzle being located at a position shifted from the third nozzle in the first direction, the fourth nozzle being closest to the third nozzle among the nozzles in the fourth nozzle array, the second ejection control data being generated by distributing a plurality of data included in the image data for the second one line into the third data and the fourth data alternately in an arrangement order of the plurality of data;
store the acquired ejection control data and the acquired second ejection control data in the memory; and
perform an ejection operation of, while moving the carriage once, controlling the head to eject liquid from the first nozzle based on the first data included in the ejection control data stored in the memory, to eject liquid from the second nozzle based on the second data included in the ejection control data stored in the memory, to eject liquid from the third nozzle based on the third data included in the second ejection control data stored in the memory, and to eject liquid from the fourth nozzle based on the fourth data included in the second ejection control data stored in the memory,
the memory being configured to store the ejection control data of an amount that is smaller than or equal to an amount required for performing the ejection operation twice.
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