Television receiver with high voltage protection circuit
US4544954A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1984 |
| Grant date | Oct 1, 1985 |
| Priority date | — |
| Expiry date | Jan 23, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high voltage generator in a television receiver responds to horizontal deflection rate signals from a horizontal oscillator which normally responds to a horizontal sync signal derived from the television signal. A sync validity detector provides a control signal indicative of the validity of the horizontal sync signal to an electronic tuning system in order to identify active channels, and to the deflection system to inhibit the response of the deflection system to false sync signals otherwise capable of causing the oscillator to operate a lower frequency likely to cause the high voltage generator to develop an excessively high voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.