Image scanner with a stepping control table
US6459507B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1999 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Apr 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04794
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention provides a scanner, which is capable of scanning document images based on a stepping control table and a method to generate such a table. This scanner includes a scanning module to scan a document and generates a responding image signal, a stepping motor to drive the scanning module or the document and a control device to control the operation of the scanning module and the stepping motor. This control device includes a stepping control table, which contains the stepping numbers for the stepping motor to drive the scanning module or the document. While scanning a document, this device will accurately control the stepping motor according to the stepping numbers relating to the locations of the lines to be scanned, and further move the scanning module or the document to a pre-defined position for a scanning task. A design like this will reduce errors in a scanning module's movement caused by the mechanical deviation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.