Patent ID: 7267416

Claim:
A method of ejecting ink drops for a printing device, the printing device having a plurality of nozzle arrays each including a plurality of nozzles arranged in a line, a plurality of pressure chambers corresponding to each nozzle of the plurality of nozzle arrays, and a piezoelectric actuator that is driven to change a capacity of each pressure chamber filled with ink to be ejected, an ink drop being ejected from each nozzle as an ejection pulse signal is applied to the piezoelectric actuator, the method comprising the steps of: first delaying a timing at which the ejection pulse signals are applied for the nozzles of the nozzle arrays other than those of a reference nozzle array which is a predetermined one of the plurality of nozzle arrays with respect to a timing at which the ejection pulse signals are applied for the nozzles of the reference nozzle array; and second delaying a timing at which the ejection pulse signals are applied for nozzles which are to eject a relatively small amount of ink drops with respect to a timing at which the ejection pulse signals are applied for nozzles which are to eject a relatively large amount of ink drops.