Ambient light contrast and color control circuit
US4090216A · kind A · utility
250Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 26, 1976 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | May 26, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/58
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Contrast and color levels in a color television receiver are automatically varied with ambient light variations by an RC circuit AC coupling an ambient light responsive device to a luminance signal channel and DC coupling the ambient light responsive device to a DC potential source and a chrominance signal channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.