Multiple-background device for a scanner and calibration device utilizing the same principle
US7411704B2 · kind B2 · utility
10Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 21, 2005 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Aug 30, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/044
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multiple-background device for a scanner and a calibration device utilizing the same principle are disclosed. The multiple-background device includes a shaft, a low-reflectance portion and a high-reflectance portion are formed along the length of the shaft. Thereby the shaft can provide various background colors, and the optical module can acquire a plurality of scan lines by means of rotating the shaft for image calibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.