Liquid jet apparatus and printing apparatus
US8246133B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2010 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Jan 19, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J29/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A liquid jet apparatus includes a plurality of nozzles, an actuator provided for each nozzle and connected to the respective nozzle, and a 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 for controlling the operation of the actuator, a modulator unit that pulse-modulates the drive waveform signal to produce a modulated signal, a digital power amplifier for power-amplifying the modulated signal to produce an amplified signal, a low-pass filter for smoothing the amplified signal and supplying the actuator with the drive signal, and a carrier frequency adjusting unit that adjusts a carrier frequency of the pulse modulation by the modulator unit in accordance with the number of actuators to be driven.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.