Conditional-reset, temporally oversampled image sensor
US9344635B2 · kind B2 · utility
9Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2012 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | Nov 8, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00769
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Pixel circuits in an image sensor are sampled repetitively during an image frame period. At each sampling, a signal indicative of the photocharge integrated by a pixel circuit since last reset is compared to a threshold. If the integrated photocharge signal has not reached the threshold, the pixel circuit is permitted to continue integrating photocharge. If the integrated photocharge signal has reached the threshold, the pixel circuit is reset to remove integrated photocharge and photocharge integration for that pixel circuit is restarted. A corresponding pixel circuit value is recorded for the reset pixel circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.