LED array exposure device, controlling method thereof, and image forming apparatus using the same
US7034858B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2003 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Nov 11, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/295
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Corrected driving currents for a low gray level and a high gray levels are obtained respectively from a standard driving current by incorporating a beam spot area correction coefficient for variations of a beam spot area formed by a light beam emitted from a light-emitting element and transmitted through a lens array; an influence for a low gray level and a high gray level caused by one of a screen angle of pixel, a sensitivity of photoconductor, a surface temperature of photoconductor, and a developing bias voltage; and a light quantity correction coefficient. A driving current for driving the light-emitting element is obtained by using linear interpolation from the two corrected driving currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.