System and method for selectively dimming an LED
US7649327B2 · kind B2 · utility
107Cited by
39References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2006 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Mar 6, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present disclosure include an LED ballast circuit for dimming one or more LEDs using a phase controlled dimmer switch. The LED ballast circuit has a power conditioning unit which includes a substantially fixed duty cycle clock for outputting a clock cycle and a transformer configured to store energy and discharge a substantial portion of the stored energy once per clock cycle in order to power one or more LEDs. The LED ballast circuit and load collectively behave like a resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.