Patent ID: 8783810

Claim:
A dot formation positioning device for a fluid ejection device including a relative movement unit for bringing about relative movement between a recording medium and a head furnished with a plurality of nozzles to eject fluid from the plurality of nozzles in accordance with raster data with the plurality of nozzles including a plurality of nozzle groups in the direction of the relative movement, and the nozzle groups including a plurality of nozzles in the direction of the relative movement, the dot formation positioning device comprising: a nozzle group timing setting unit configured to set an ejection timing for dots formed by each of the nozzle groups to undergo position adjustment in the direction of the relative movement; an adjustment pixel setting unit configured to adjust a distribution of adjustment pixels for dots formed by each of the nozzles in the nozzle groups to undergo position adjustment in the direction of the relative movement; and a timing control unit configured to perform control to eject fluid in accordance with both the raster data generated on the basis of the distribution of the adjustment pixels set by the adjustment pixel setting unit and of the ejection timing set by the nozzle group timing setting unit.