Clipped dynamic range compression image sensing apparatus
US5164832A · kind A · utility
19Cited by
6References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Mar 8, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/73
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Solid state image sensing apparatus including a readout circuit associated with each detector element. The readout circuit includes a clipping gate that operates to drain charge, from a charge storage region associated with the detector element, that is in excess of a potential barrier height of the clipping gate. The barrier height is first maintained at a lower value and then at a higher value during each frame integration period so that intensity range compression of a high level image signal is achieved, while a low level image signal is not affected by the operation of the clipping gate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.