Scanning device capable of calibrating step angle errors
US6707582B2 · kind B2 · utility
5Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2002 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Sep 8, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04794
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanner includes a housing, a transparent platform, a scanning module, a motor and a calibration paper. The transparent platform is installed on the housing for a document to be placed on. The scanning module is moveably installed inside the housing for scanning the document. The motor is installed inside the housing for driving the scanning module. The calibration paper is installed at a front end of the housing and has a graph for calibrating step angle errors of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.