Solid-state imaging device
US9197828B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2014 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Mar 2, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/633
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging sensor comprises a pixel array having an active imaging portion and a shielded portion. The active imaging portion provides an image signal corresponding to light incident on the pixel array. The shielded portion is shielded from the light incident on the pixel array and therefore provides a dark current signal. The imaging sensor includes a black-level adjustment circuit which adjusts the imaging signal to compensate for variations in the imaging signal black-level values. The black-level adjustment circuit includes an average value calculator to calculate an average signal value for each of a plurality of shielded regions in the shielded portion of the pixel array. A region selector is configured to select average signal values that are within a predetermined range. A black-level adjustment value calculator uses the selected values to calculate an adjustment value for the black-level of the image signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.