Imaging-offset compensation methods and systems
US6532029B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2000 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Nov 21, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04793
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Imaging offset problems in imaging systems, such as electrophotographic (EPG) printers and copiers, are overcome. Imaging offset results from misaligned exposure units that, when uncompensated, produce dots on a photoreceptor belt at exposure positions that are offset from ideal dot positions. An imaging-offset compensating method of the invention first determines the imaging offset, which is a distance that may include a magnitude and a direction. The imaging offset is determined with respect to the ideal dot position. A time factor is then determined based on the magnitude of the imaging offset for each exposure unit. The time at which each exposure unit is actuated is modified by a respective time factor so that a dot produced by each exposure unit matches the ideal dot location thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.