Video display system with stabilized background level
US4660083A · kind A · utility
5Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1985 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Oct 29, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/72
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video monitor includes a kinescope driver amplifier AC coupled to a kinescope via a capacitor which is also associated with a video signal clamp. A control signal related to the magnitude of video signals coupled to the kinescope modifies the kinescope bias so as to increase kinescope current conduction and image brightness, to counteract the tendency of a displayed image to exhibit reduced brightness as the amplitude of the video signal increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.