Dimming control circuit
US5004957A · kind A · utility
33Cited by
7References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1989 |
| Grant date | Apr 2, 1991 |
| Priority date | — |
| Expiry date | Jan 6, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit and a method for controlling the dimming of incandescent lights using a pair of antiparallel connected SCRs which are fired at the same frequency as the frequency of the AC line power to achieve phase control of the power supplied to the light. Only one SCR of the pair is utilized in the 0% to 50% brightness range while both SCRs are utilized in the 51% to 100% brightness range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.