Original-detection method and device, and original-processing device having an original-detection function
US5764380A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1995 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Oct 19, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00753
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An original-detection device includes a pressing member for pressing an original on an original-mount from a side opposite to a surface illuminated by scanning light, an absorption member, provided on an original-pressing surface of the pressing member, for absorbing light of a predetermined wavelength region within an invisible region, a filter for transmitting light of the predetermined wavelength region of reflected light obtained by projecting the scanning light onto the original or the original-pressing surface, a photosensor for sensing light transmitted through the filter, and a detection circuit for detecting the original on the original-mount based on an output from the photosensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.