Individual voltage trimming with waveforms
US7234788B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 3, 2004 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Jul 8, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/04588
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Apparatus including a plurality of droplet ejection devices, an electric source and a controller. Each droplet ejection device includes switches connected in parallel to a piezoelectric actuator. Each switch includes an input terminal to connect to an input waveform signal, an output terminal to connect to the piezoelectric actuator, a control signal terminal to control a connection of the switch with a control signal, and a resistance between the input terminal and output terminal. The apparatus has a waveform table with information to distribute the input waveform signal to an input of each of the droplet ejection devices. The waveform signal table includes waveform signal information for a step pulse, a sawtooth waveform, and/or a combination of two or more waveform patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.