Head drive device of inkjet printer and inkjet printer
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United States of America Patent
Stats
-
Apr 30, 2013
Grant Date -
Apr 19, 2012
app pub date -
Dec 21, 2011
filing date -
Jan 17, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A head drive of an inkjet printer includes nozzles and corresponding actuators that eject liquid ink drops. A drive unit applies a drive signal to the actuators. The drive unit includes a drive waveform generator that generates a drive waveform signal to control the drive of the actuators. A modulator pulse modulates the drive waveform. A digital power amplifier amplifies power of the modulated signal. A low pass filter smoothes the amplified digital signal and supplies the signal as a drive signal to the actuators. An inverse filter provided in a subsequent stage of the drive waveform generator corrects at least the frequency characteristics of the filter to predetermined frequency characteristics, independent of the number of the actuators to drive.
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