Belt-drive control device, color-shift detecting method, color-shift detecting device, and image forming apparatus
US7376375B2 · kind B2 · utility
26Cited by
3References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2006 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Nov 5, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/1623
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A mark detecting unit detects a mark that is a reference position of an endless belt. An angular-displacement-error detecting unit detects an angular displacement error of an encoder caused by thickness fluctuation of the endless belt. A first calculating unit calculates a phase and a maximum amplitude to the mark. A second calculating unit calculates correction data according to a distance from the mark on the endless belt. A belt-drive control device controls a belt driving unit by adding the correction data to a preset control target value to stabilize speed fluctuation of the endless belt due to the thickness fluctuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.