Image scanner having brightness compensation function via output adjustment
US6205258A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1998 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | May 6, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4076
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cost effective and easily assemblable image scanning device with a relatively stable and satisfactory scanning effect is disclosed. The present image scanning device is used in an image scanner having a light source and a focusing reflector device. The image scanner device includes a brightness reflection device for generating a brightness reflection signal in response to a light signal from the light source; an image sense device for respectively generating an image sense signal and a reference brightness signal in response to an object reflection signal from the object to be scanned and the brightness reflection signal; and a brightness-controlling device electrically connected to the image sense device for compensating the image sense signal in response to the reference brightness signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.