Document reading apparatus, image processing apparatus, image forming apparatus, and copying machine
US7715066B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 2006 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Jan 16, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00912
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An opening detector detects a state of a platen whether the platen is “opened” at a level equal to or above a set opening degree or “closed” at a level less than the set opening degree. A reading controller starts lighting of an illumination lamp in response to a change of the state of the platen from the “opened” to the “closed”. A rising detector detects a rising of light intensity of the illumination lamp. A size detector reads an image signal of an imaging element after the rising detector detects a rising of the light intensity, determines presence of a document in a main scanning direction, and decides a document size in the main scanning direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.