Image scanning device including a combine unit which superimposes conversion results of a plurality of photoelectric converters
US8310740B2 · kind B2 · utility
0Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2008 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Feb 27, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04756
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image scanning device includes a CCD pair provided with two rows of photodiode arrays for scanning an image on a paper, a motor drive circuit for causing the CCD pair to sub-scan the image on the paper, and an adder for superimposedly combining two outputs of the CCD pair with a predetermined time lag therebetween. A control unit controls the adder to add the two outputs of the CCD pair without the time lag when received an instruction of a low resolution that corresponds to ½ of a high resolution by a resolution switch and thereby doubles a speed of the sub-scan by the motor drive circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.