Liquid jet apparatus and printing apparatus
US7758140B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2007 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Mar 30, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J3/543
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printing apparatus uses a liquid jet apparatus including 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 drive waveform signal generation unit that generates a drive waveform signal providing a basis of a signal for controlling the actuator, feedback correction unit for feedback-correcting the drive waveform signal generated by the drive waveform signal generation unit, modulator unit for pulse-modulating the corrected drive waveform signal feedback-corrected by the feedback correction unit, a digital power amplifier for power-amplifying the modulated signal, which is pulse-modulated by the modulator unit, and 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 the feedback correction unit includes a virtual filter having an equivalent frequency characteristic to a frequency characteristic of a filter composed of the low-pass filter and capacitance of the actuato…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.