Image reading apparatus
US8488219B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 2010 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Sep 3, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/48
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reading apparatus includes: a light source to illuminate an original; a color sensor and a monochrome sensor to receive light reflected from the original illuminated by the light source to output an image signal; an amplifier to amplify the image signal from the color and monochrome sensors; a reflective reference member; and a control circuit to adjust a gain of the amplifier amplifying the image signal from the color sensor that receives light reflected from the reflective member illuminated by the light source, and holds the adjusted gain as a gain setting value for the color sensor, and the control circuit obtains a gain setting value for the monochrome sensor by calculation based on the gain setting value for the color sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.