Image forming apparatus and control method thereof
US7457552B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2008 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Feb 20, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/0009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Image forming apparatus in which surface electric potentials of a plurality of surface areas are detected by charging a photoconductor with a different applied bias for each predetermined timing and exposing a plurality of surface areas of the photoconductor by scanning the photoconductor with an optical beam, while changing an exposure intensity of the optical beam for each of the surface areas of the photoconductor. Then, the applied bias necessary for obtaining a predetermined electric potential of a dark section and the exposure intensity of the optical beam necessary for obtaining a predetermined electric potential of a bright section are controlled, on the basis of the surface electric potentials that are detected respectively from the different applied biases and the different exposure intensities. Thereby, the adjustment time can be made shorter than the conventional case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.