Patent ID: 7303250

Claim:
A liquid ejection apparatus, comprising: a liquid ejection head, comprising: pressure chambers, each of which is adapted to store liquid therein; nozzle orifices, each of which is communicated with one of the pressure chambers, the nozzle orifices being arranged so as to form a first group of nozzle arrays and a second group of nozzle arrays; and pressure generating elements, each of which is operable to generate pressure fluctuations in the liquid stored in one of the pressure chambers to eject a liquid droplet from one of the nozzle orifices associated with the one of the pressure chamber; a first region, in which a target medium to which the liquid droplet is landed is placed; a second region, in which no target medium is placed; and a controller, operable to cause the liquid ejection head to flush liquid droplets at the second region such that a first prescribed number of liquid droplets are flushed from each of the nozzle orifices in the nozzle arrays of the first group, and a second prescribed number of liquid droplets are flushed from each of the nozzle orifices in the nozzle arrays of the second group, wherein at least a part of the first prescribed number of liquid droplets and at least a part of the second prescribed number of liquid droplets are flushed by alternately execution a first unit flushing operation for flushing a third prescribed number of liquid droplets which is smaller than the first prescribed number and a second unit flushing operation for flushing a fourth prescribed number of liquid droplets which is smaller than the second prescribed number; and wherein the third prescribed number and the fourth prescribed number are different from each other.