Patent ID: 7461911

Claim:
A droplet ejection apparatus comprising: an ejecting unit provided with plural droplet ejection portions, each droplet ejection portion comprising: a pressure chamber containing a liquid; an ejecting portion communicating with the pressure chamber and ejecting droplets according to changes in pressure in the pressure chamber; and a driving element that changes the pressure in the pressure chamber according to a driving signal applied thereto and causes the ejecting portion to eject the droplets of a droplet volume in accordance with the applied driving signal; a driving unit generating the driving signal according to ejection data and applying the generated driving signal with a predetermined voltage application cycle period to the driving elements; and a correcting unit that corrects the ejection data such that a voltage application timing of the driving signal for the driving elements is corrected by an integer multiple of a voltage application cycle period according to a time difference of ejection times when, between a plurality of droplets of different droplet volumes which are ejected to a medium onto which the droplets are ejected, a difference of the ejection times, from ejection of the droplets from the ejecting portion until adhering of the droplets to the medium, or from application of the driving signal to the driving elements and the ejecting portion ejecting the droplets until adhering of the droplets to the medium, exceeds ½ the voltage application cycle period.