Methods, systems and apparatuses using barrier self-calibration for high dynamic range imagers
US7920193B2 · kind B2 · utility
13Cited by
6References
25Claims
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Key dates
| Filing date | Oct 23, 2007 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Aug 9, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/76
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods, systems and apparatuses proving a high dynamic range imager. Multiple photosensor integration periods are used to capture pixel signal information. A transistor gate is used to remove electrons from the photosensor between the two successive integration periods providing a non-linear pixel response characteristic having a knee point. Each pixel is calibrated for the knee point which is used during adjustment of the pixel output signal. Each pixel may also be calibrated with an arbitrary signal response curve for multiple light intensities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.