Circuit for producing the operating voltages and the horizontal-deflection current for picture-reproducing equipment
US4665347A · kind A · utility
3Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1984 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Jul 20, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In picture-reproducing equipment with higher scanning frequencies (e.g., flicker-free television, visual display unit), the generation of the horizontal-deflection current is separated in frequency from the generation of the operating voltages by supplying the horizontal-deflection circuit from a DC voltage source which is part of the voltage power supply providing the operating voltages. The supply circuit is preferably connected to the grounded deflection capacitor. This makes it possible to influence the picture geometry in a simple manner, particularly to perform horizontal pincushion correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.