Image forming apparatus to detect and correct density variations in a developed image
US8648892B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2012 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Apr 13, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/5058
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus that forms an image according to image information includes density sensors that detect image density variations in main and sub-scanning directions. A processing device generates correction data for correcting a light source output to suppress the density variations based on detection results. The processing device modifies the correction data such that the light source output after the correction is at least a minimum rated output at a position at which the output after the correction is lower than the minimum rated output, in the relation between a position on the surface of the photosensitive element in the main-scanning direction and the output after the correction, and modifies the correction data such that the light source output after the correction is at most a maximum rated output at a position at which the output after the correction is higher than the maximum rated output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.