Scanner and method thereof
US7746513B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2005 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Apr 29, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/193
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanner including a light source, an optical module, a driving device, and a control unit is provided. The light source emits a light beam to the to-be-scanned document. The optical module includes a photo sensing device for receiving the light beam reflected by the to-be-scanned document. The driving device includes a position detecting device, for detecting a position of the optical module relative to the to-be-scanned document, and outputting a position feedback signal accordingly. The control unit includes a light source controller and a timer. The scanning method includes the steps of setting the value of K to 1; moving the optical module to read the Kth scan line and adjusting the luminance of the light source to compensate exposure level of the (K+1)th scan line; and determining if K is smaller than N.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.