LED lighting system having a reduced-power usage mode
US8283874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2009 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Apr 28, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/17
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED lighting system, with first and second types of LEDs of different efficacies, has a reduced-power usage mode. A control system independently controls first and second control groups of first and second types of LEDs, respectively. The control system has one or more modes including a reduced-power usage mode for decreasing the overall power consumption of the lighting system while maintaining a light level of at least a predetermined percentage of the level present when the first control group of LEDs operates at a power level between less-than-full power and full power and the second control group is off. The predetermined percentage is 50. The control system decreases the overall power consumption of the lighting system in the reduced-power usage mode by turning off or dimming the first control group and turning on the second control group to at least some extent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.