Circuit for the continuous zoom adjustment of the picture width in a television receiver
US5530488A · kind A · utility
6Cited by
2References
8Claims
0Family size
Inventors
Key dates
| Filing date | Jun 2, 1994 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Jun 2, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/27
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a television receiver, having the ability to display differing image formats, the image width is capable of being continuously adjustable in the manner of a zoom effect. The ability to continuously adjust the image width is accomplished without any perceptible effect on the horizontal scan output. In that circuit, a tangent capacitor is coupled to a second capacitor with a switch being connected for switching the second capacitor into and out of the circuit. The switch is closed for an adjustable period beginning at the line center.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.