Color temperature controlled and low THD LED lighting devices and systems and methods of driving the same
US9247597B2 · kind B2 · utility
70Cited by
19References
50Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2012 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Dec 3, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The purposes of the devices described herein are to provide an LED lighting device capable of efficiently and economically emitting light having a selectable color temperature or a warm-on-dim feature when driven with AC power and to provide LED lighting devices which have an improved power factor and a reduced total harmonic distortion when powered with AC power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.