High voltage generating apparatus for supplying high voltage to cathode ray tube
US4885509A · kind A · utility
5Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1988 |
| Grant date | Dec 5, 1989 |
| Priority date | — |
| Expiry date | Apr 29, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high voltage generating apparatus for supplying a high voltage to a cathode-ray tube is provided with a flyback transformer which has a low voltage coil and a high voltage coil. A first circuit detects a quantity of current which flows in the low voltage coil, and a second circuit detects a quantity of current which flows in the high voltage coil. A thyristor turns on when the quantity of current of the first circuit becomes larger than that of the second circuit to fusing-disconnect a fuse connected to a power supplying circuit, thus stopping the operation of the flyback transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.