Image scanning apparatus with light source condition testing
US5978614A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Mar 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3225
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image scanner arrangement having a scanner, a document feeder scanning portion and a flat scanning bed. A single white plate is provided between the document feeder scanning portion and flat bed. Before scanning, the scanner scans the white plate to provide image data for testing. If this image data contains white pixels not less than 90%, a controller determines that a lamp of a light source of the scanner illuminates appropriately. After confirming that the light source is in a good condition, the scanning starts. The single white plate is utilized regardless of scanning being performed with the document feeder scanning portion or the flat scanning bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.