Image forming apparatus and method
US6636251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2002 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | May 31, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40031
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image forming and apparatus is provided in which a halftone density of an image is stabilized irrespective of a timing at which writing on scanning lines is started, even when using multiple laser beams. First, it is determined whether or not a portion exposed by adjacent laser beams (i.e., exposed by both of two beams simultaneously) is present. If the result of the determination is affirmative, it is then determined whether or not a portion adjacent to the exposed portion and not exposed by a laser beam is present. If the result of this determination is affirmative, exposure by fine dots is added to the portion not exposed by a laser beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.