| 摘要 |
PROBLEM TO BE SOLVED: To provide a head driving device of an inkjet printer adapted to amplify a current of a driving signal by utilizing a relatively low constant voltage by a simple constitution. SOLUTION: The head driving device 10 of the inkjet printer selectively drives at a predetermined printing timing, piezoelectric elements 11 respectively set corresponding to a plurality of nozzles by amplifying a first driving signal COMA from a first head driving circuit 12 by a first current amplifying circuit 13, thereby discharging ink drops from corresponding nozzles to record. The head driving device 10 is equipped with a second head driving circuit 21 for generating a second driving signal COMB different from the first driving signal, and a second current amplifying circuit 22 for amplifying the second driving signal. The second driving signal amplified by the second current amplifying circuit is selectively applied to an electrode 11b at the ground side of each piezoelectric element. COPYRIGHT: (C)2004,JPO
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