Protection circuit for improper line voltage
US4731655A · kind A · utility
3Cited by
14References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1986 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Aug 27, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video display apparatus includes a protection circuit for preventing damage due to the application of excessively high line voltage. The video display apparatus includes a start-up circuit that provides power to initiate operation of a switching voltage regulator. In response to an improperly high line voltage, the start-up circuit is disabled and the video display apparatus does not become operative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.