Handheld image scanner with automatic movement control
US5182450A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 6, 1991 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Nov 6, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04734
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A handheld image scanner is provided with a driving motor to permit manual or automatic transverse scanning movement. Stable and proper linear movement of the handheld image scanner is ensured when movement of the handheld image scanner is automatically controlled. The voltage supply to the driving motor can be adjusted so as to obtain the preferred scanning speed for a desired degree of resolution. The handheld image scanner is to be electrically connected to a computer which receives digital scan data from the image scanner. A transistor unit, which is connected in series to the driving motor, is controlled by the computer so as to interrupt current supply to the driving motor when the computer is not ready to receive additional scan data. Scanning is thus stopped and is resumed only when the computer is able to receive more scan data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.