Iris control of a CCD camera using selective well dumping
US6646683B1 · kind B1 · utility
Assignees
Inventor
Key dates
| Filing date | Jul 14, 1999 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Jul 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/71
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for applying a selective shutter to an imaging device. An image is received via a CCD unit and a portion of the received image that presents an overflow condition is determined. The amount of time light from the portion of the image presenting an overflow condition is received is selectively reduced so as to eliminate the overflow condition. The CCD unit comprises a plurality of individual imaging elements which receive light from the image for a time period corresponding to a predetermined duty cycle. Individual imaging elements corresponding to the portion of the received image that presents the overflow condition are connected to a current drain for a determined amount of time during the duty cycle, and this reduces the amount of time the determined portion of the image receives light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.