JP2009061671A5 - - Google Patents

Claims (9)

Drive waveform signal generating means for generating a drive waveform signal for a capacitive load;
  A plurality of drive signal generating means for amplifying the drive waveform signal to output a drive signal;
  A charging terminal for supplying a charge to the plurality of drive signal generating means;
  A potential adjustment signal generating means for generating a potential adjustment signal used to adjust the potential of the charging terminal based on the drive waveform signal so as to reduce a potential difference from the drive signal;
  A potential adjusting means for adjusting the potential of the charging terminal based on the potential adjusting signal;
With
  The potential adjustment means includes a modulation means for pulse-modulating the potential adjustment signal, a digital power amplifier for power-amplifying the modulation signal pulse-modulated by the modulation means, and a digital power amplification signal amplified by the digital power amplifier. And a smoothing filter for smoothing and outputting to the charging terminal. The drive waveform signal generating means generates a plurality of different drive waveform signals, and the potential adjustment signal generating means sets the potential of the charging terminal higher than the potential during the charging period of the drive waveform signal. The drive circuit according to claim 1. Drive waveform signal generating means for generating a drive waveform signal for a capacitive load;
  A plurality of drive signal generating means for amplifying the drive waveform signal to output a drive signal;
  A discharge terminal for discharging charges from the plurality of drive signal generating means;
  Based on the drive waveform signal, potential adjustment signal generating means for generating a potential adjustment signal used to adjust the potential of the discharge terminal so as to reduce the potential difference from the drive signal;
  A potential adjusting means for adjusting the potential of the discharge terminal based on the potential adjusting signal generated by the potential adjusting signal generating means;
With
  The potential adjustment means includes a modulation means for pulse-modulating the potential adjustment signal, a digital power amplifier for power-amplifying the modulation signal pulse-modulated by the modulation means, and a digital power amplification signal amplified by the digital power amplifier. And a smoothing filter that smoothes and outputs to the multiple discharge terminal. The drive waveform signal generating means generates a plurality of different drive waveform signals, and the potential adjustment signal generating means sets the potential of the discharge terminal to be lower than the potential during the charging period of the drive waveform signal. The drive circuit according to claim 3. 5. The drive circuit according to claim 1, wherein the potential adjustment signal generation unit adjusts a voltage value of the potential adjustment signal to generate the potential adjustment signal. 6. 5. The drive circuit according to claim 1, wherein the potential adjustment signal generation unit adjusts a phase of the potential adjustment signal to generate the potential adjustment signal. 6. A liquid ejecting head, and a plurality of nozzles provided in the liquid ejecting head,
  The jet device provided with the drive circuit according to claim 1, wherein the capacitive load is an actuator, is provided corresponding to the nozzle, and applies a drive signal to the actuator. The drive signal generating means is provided in each of a plurality of nozzle groups into which the nozzles are divided, and amplifies the drive waveform signal generated by the push-pull-connected charging transistor and the discharging transistor, to the corresponding nozzle group The injection device according to claim 7, wherein a drive signal is output toward the injection device. A printing apparatus comprising the ejection device according to claim 7.