Image forming apparatus utilizing a piezoelectric-transformer high-voltage power supply and method for controlling the same
US7196475B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2006 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Jan 17, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/80
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A piezoelectric-transformer high-voltage power supply in combination with an image-forming apparatus including a latent-image forming section configured to form an electrostatic latent image on an image carrier, a developing section configured to form a toner image on the electrostatic latent image, and a transfer section configured to transfer the toner image onto a transfer material includes a piezoelectric transformer; a piezoelectric-transformer drive circuit; an output-voltage setting-signal output circuit configured to output an output-voltage setting-signal; an output-voltage detector circuit, and a drive control circuit configured to output a control signal on the basis of a signal from the output-voltage detector circuit and the output-voltage setting-signal, for controlling the piezoelectric-transformer drive circuit. The output-voltage setting-signal output circuit outputs an output-voltage setting-signal corresponding to a voltage lower than a target voltage and, then, another output-voltage setting-signal corresponding to the target voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.