Solid-state imaging device and camera system which performs clamp processing
US8537252B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 2010 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Jun 6, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/76
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A solid-state imaging device includes: a pixel unit in which pixels that perform photoelectric conversion are arranged in an optical black region and a valid pixel region; a readout processing unit that applies, to a readout signal of the pixel unit, readout processing corresponding to a reference signal subjected to clamp processing; and a clamp processing unit that clamps, referring to a readout signal level in the optical black region, a reference signal in the valid pixel region with an acquired clamp value, which is a value with which the signal level is reduced to zero. The clamp processing unit acquires, when information concerning readout is changed, a clamp value predicted from the clamp value before the change and a ratio of charge accumulation times before and after the change, and the readout processing unit performs first signal readout processing after the change with a reference signal clamped by the predicted clamp value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.