Black level control for image sensors
US9591242B2 · kind B2 · utility
3Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2013 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Aug 16, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/8057
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An embodiment image sensor includes a pixel region spaced apart from a black level control (BLC) region by a buffer region. In an embodiment, a light shield is disposed over the BLC region and extends into the buffer region. In an embodiment, the buffer region includes an array of dummy pixels. Such embodiments effectively reduce light cross talk at the edge of the BLC region, which permits more accurate black level calibration. Thus, the image sensor is capable of producing higher quality images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.