Patent ID: 7066565

Claim:
A method jetting liquid droplets, comprising the steps of: providing a liquid jetting head which includes: a plurality of nozzle orifices; a plurality of pressure generation chambers associated with the nozzle orifices; and a plurality of piezoelectric vibrators for respectively varying the volume of the associated pressure generation chamber to jet a liquid droplet from the associated nozzle orifice; providing ID data for identifying the respective nozzle orifices; providing a reference drive signal to instruct the piezoelectric vibrator to jet a reference liquid droplet having a designated amount from the nozzle orifice; applying the reference drive signal to the respective piezoelectric vibrators to jet liquid droplet from the nozzle orifices; measuring amounts of the respective liquid droplets jetted from the respective identified nozzle orifices by the reference drive signal; identifying a difference between the designated amount and the measured amount of each liquid droplet; providing correction data for reducing the difference so that the designated amount is jetted from the nozzle orifice; associating the correction data with the respective nozzle orifices identified by the ID data; storing the associated correction data; providing a plurality of serial drive signals for driving the piezoelectric vibrators to jet liquid droplets from the nozzles; selecting at least one drive signal from the plurality of serial drive signals to adjust a displacement behavior of a piezoelectric vibrator associated with the identified nozzle orifice, based on the associated correction data; and applying the selected drive signal to the piezoelectric vibrators.