Color temperature adjustment for LED lamps using switches
US8669722B2 · kind B2 · utility
36Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2011 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | May 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-emitting diode (LED) lamp includes a number of different color LEDs that can be turned on and off in different combinations using an external switch operable by a user. A user or a controller can adjust the color temperature of light output by the lamp. The color temperature change may be a user preference and can compensate for decreased phosphor efficiency over time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.