Scanner illuminator systems and methods
US7545543B2 · kind B2 · utility
3Cited by
22References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2004 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Jun 22, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/1061
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanner includes an illuminator and a platen adapted to support a document to be scanned. A light source directs light into the platen and the light is reflected internally within the platen. A movable light sensor is positioned adjacent the platen. Liquid crystal sections between the document and the light sensor cause a zone of light to pass from the platen to the document, thereby illuminating only a portion of the document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.