Image forming apparatus and image forming method
US6392684B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Jun 29, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/123
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is provided an image forming apparatus which can implement digital control of a laser beam scan (analog amount) that moves at high speed, without using any high-speed, multi-bit A/D converter. Upon executing a digital process on the basis of analog detection value Vo corresponding to the passage position or light beam power of a light beam with which a photosensitive drum is irradiated, comparator CMP0, comparison reference value (threshold value) Vr of which changes in correspondence with detection value (integration output) Vo, is used. New comparison reference value Vr is supplied to comparator CMP0 on the basis of digital data BMDA corresponding to output CMPOUT of this comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.