High dynamic range imager circuit and method for reading high dynamic range image
US8575533B2 · kind B2 · utility
13Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2011 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | May 17, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a high dynamic range imager circuit and a method for reading high dynamic range image with an adaptive conversion gain. The high dynamic range image circuit includes a variable capacitor. The capacitance of the variable capacitor is adjusted according to sensed light intensity or by internal feedback control, to adaptively adjust the conversion gain of the high dynamic range image circuit as it reads a signal which relates to a pixel image sensed by an image sensor device. In each cycle, the signal can be read twice or more with different dynamic ranges, to enhance the accuracy of the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.