Correcting the polarization of piezoelectric elements in an ink jet head

摘要

A liquid jetting head (for eg a line printer) includes a nozzles configured to jet liquid droplets and of piezoelectric elements corresponding to the nozzles. The piezoelectric elements are generate pressure which causes corresponding nozzles to jet the liquid droplets. A parallel progress type polarization correction unit performs, on each of the piezoelectric elements in a parallel manner, a polarization correction process of correcting polarization degrees of the piezoelectric elements corresponding to all of the nozzles to be corrected of the plural nozzles. The time of flight for respective droplets is therefore harmonized. A sequential polarization correction applying process and status evaluation is also shown.