Patent ID: 8430466
Filing Date: 2013-04-30
Classification: B41J,H01L

Abstract:
1. A head drive apparatus of an inkjet printer, comprising: a plurality of nozzles provided to an inkjet head; a plurality of actuators provided corresponding to the nozzles; and a drive unit that applies a drive signal to the actuators, the drive unit including: a drive waveform generator that generates a drive waveform signal as a reference of the drive signal; an inverse filter that emphasizes the drive waveform signal to output an emphasized signal; a modulator that pulse modulates the emphasized signal to output a modulated signal; a digital power amplifier that amplifies the modulated signal to output an amplified signal; and a low pass filter that smoothes the amplified signal to supply to the actuators as the drive signal; wherein the inverse filter emphasizes a component of the drive waveform signal attenuated by capacitances of the actuators to be driven and the low pass filter, wherein the inverse filter emphasizes the component of the drive waveform signal before the low pass filter supplies the drive signal to the actuators, and wherein a number of the actuators to be driven is derived from print data.