Regulated power supply for video display apparatus
US4626977A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1985 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Dec 27, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/1853
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video display apparatus includes a regulated transformer power supply that provides power to an external load device, such as a computer, via one winding on the power supply transformer. Operation of the video display apparatus without the external circuit attached may cause degradation of the other transformer winding load circuits due to insufficient transformer power transfer as a result of decreased external power supply loading. A diode is connected from the external load supply to another load circuit to supply power to the other load circuit when the external device is not attached. When the external device is attached, the diode is reverse biased and does not conduct.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.