Spot exposure adjustment circuit
US4535364A · kind A · utility
10Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1981 |
| Grant date | Aug 13, 1985 |
| Priority date | — |
| Expiry date | Nov 10, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/71
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television camera of the type having an image pickup element for converting the image of an object to be photographed into an electrical signal having an exposure control circuit with a voltage detector and controlling the exposure according to the voltage level of said electrical signals. A spot selection circuit provides the exposure control apparatus with signals corresponding to a portion of the image less than the entire image. The exposure of the entire image is controlled in accordance with the detected voltage levels of electrical signals corresponding to the image portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.