Method and apparatus for adjusting the operating conditions of a photosensitive charge transfer device
US4553168A · kind A · utility
1Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1983 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | Dec 6, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/745
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The charges induced by the light image to be scanned are integrated cyclically. During each integration cycle, the total amplitude of the signal corresponding to said image is calculated. The calculated amplitude is compared with a threshold amplitude value which is a function of a saturation value which is itself fixed by the amplitude of a periodic bias voltage applied to the device. The amplitude of the potential wells created by said bias voltage is modulated as a function of the result of said comparison. The invention is applicable to solid state TV cameras, e.g. for use in low light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.