Anti-eclipsing circuit for image sensors
US7477298B2 · kind B2 · utility
11Cited by
3References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2004 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Jul 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An anti-eclipse circuit of an image pixel includes a clamping circuit for pulling up a voltage of a reset signal output by the pixel and an eclipse detection circuit for controllably coupling the clamping circuit output to the output of the pixel. The clamping circuit includes a source follower transistor and a switching transistor. The eclipse detection circuit includes a comparator that is operated to detect an eclipse condition. The eclipse detection circuit outputs a control signal to cause the switching transistor to conduct only when a eclipse condition is detected while the pixel is outputting a reset signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.