Patent ID: 8262180
Filing Date: 2012-09-11
Classification: B41J

Abstract:
1. A liquid jet apparatus comprising: a plurality of nozzles provided to a liquid jet head; an actuator provided corresponding to each of the nozzles; and drive unit that applies a drive signal to the actuator, wherein the drive unit includes a drive waveform signal generation unit that generates a drive waveform signal providing a reference of a signal for controlling the operation of the actuator, a modulator unit that pulse-modulates the drive waveform signal generated by the drive waveform signal generation unit, and a digital power amplifier for power-amplifying the modulated signal, which is pulse-modulated by the modulator unit, a low-pass filter for smoothing the power-amplified and modulated signal power-amplified by the digital power amplifier and supplying the actuator with the power-amplified and modulated signal as the drive signal, and a feed-forward carrier frequency adjusting unit that adjusts a carrier frequency of the pulse modulation by the modulator unit based on printing data, the printing data indicative of the number of the actuators to be driven by the drive signal, the carrier frequency being adjusted before the drive signal is supplied to the actuator.