| 摘要 |
A head member is provided with nozzles including a plurality of nozzle groups each associated with one of a plurality of colors of liquid. Each of a plurality of pressure fluctuation generator is operable to generate pressure fluctuation in liquid in each of the nozzles to eject a liquid droplet therefrom. A carriage is operable to carry the head member so as to reciprocately transverse a first region in which a medium, on which the liquid droplet is landed, is placed. A signal generator is operable to generate a first signal and a second signal. A controller is operable to drive the pressure fluctuation generator according to the first signal and ejection pattern data in a case where the head member transverse the first region in a first direction, and to drive the pressure fluctuation generator according to the second signal and the ejection pattern data in a case where the head member transverse the first region in a second direction opposite to the first direction. A pattern data adjuster is operable to adjust the ejection pattern data so as to vary an ejected number of the liquid droplet per a unit area, for each of the nozzle groups.
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