Adjustment of vertical regist shift between pages, colors or lines in a multiple beam recording system
US6239860A · kind A · utility
14Cited by
2References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Jan 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04794
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image forming apparatus which can reduce the appearance of a vertical regist shift in a multiple beam writing system. A time interval detector is provided and is configured to detect a time interval between a start signal for scanning in a sub-scanning direction and a synchronous signal for scanning in a scanning direction. Further, this time interval is compared with at least first and second threshold values. Writing by the multiple beam sources is then controlled based on the results of the comparison. By utilizing such an operation the appearance of a vertical regist shift can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.