Patent ID: 7390070
Filing Date: 2008-06-24
Classification: B41J

Abstract:
1. An ink-jet printer comprising: an ink-jet head in which are disposed a plurality of nozzles that are divided into a plurality of nozzle groups; a plurality of actuators which are provided to respectively correspond to the plurality of nozzles and which are divided into a plurality of actuator groups respectively corresponding to the plurality of nozzle groups; a plurality of drive circuits which are provided respectively for the plurality of nozzle groups and each of which outputs a drive signal used for ejecting an ink, to the plurality of actuators of a corresponding one of the plurality of actuator groups,; a controller which controls the ink-jet printer to perform printing such that, by driving any of the plurality of actuators which are determined on the basis of print data, the ink is ejected, toward a recording medium, from any of the plurality of nozzles that correspond to said any of the plurality of actuators; and an adjusting portion which adjusts the drive signal to be outputted from each of the plurality of drive circuits to reduce variation in an ink-ejection property among the plurality of nozzle groups, such that a characteristic of the drive signal to be outputted from said each of the plurality of drive circuits coincides with each other, wherein the adjusting portion is constituted by an arrangement that one of the plurality of drive circuits outputs a reference signal used for conforming the characteristic of the drive signal to be outputted from said each of the plurality of drive circuits to each other, to the other of the plurality of drive circuits, and an arrangement that the other of the plurality of drive circuits is arranged such that the reference signal is inputted thereto and such that a characteristic of the drive signal thereof coincides with a characteristic of the drive signal of said one of the plurality of drive circuits.