Image sensor with improved black level calibration
US8233066B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2010 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Dec 27, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/809
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging system capable of black level calibration includes an imaging pixel array, at least one black reference pixel, and peripheral circuitry. The imaging pixel array includes a plurality of active pixels each coupled to capture image data. The black reference pixel is coupled to generate a black reference signal for calibrating the image data. Light transmitting layers are disposed on a first side of a pixel array die including the imaging system and cover at least the imaging pixel array and the black reference pixel. A light shielding layer is disposed on the first side of the pixel array die and covers a portion of the light transmitting layers and the black reference pixel without covering the imaging pixel array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.