Method and apparatus for forming an image using signals synchronized with scanning
US6262759A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1998 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Feb 18, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04794
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for forming an image reduce the processing load on a video controller. A CPU causes a counter to start counting the optical beam detection signals of a photodiode in accordance with a signal which indicates the leading edge of a sheet of recording paper received from a TOP sensor. Comparators compare the count value issued from the counter with the values set by the CPU at registers. Based on the comparison result, an F/F sets Q output. Thus, a BD signal is issued through a gate during a period specified by the values set at the registers. The use of the BD signal reduces the processing load on the video controller which generates and transfers an image signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.