Light emitting device with at least two alternately driven light emitting diodes
US7659544B2 · kind B2 · utility
8Cited by
20References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2005 |
| Grant date | Feb 9, 2010 |
| Priority date | — |
| Expiry date | Mar 31, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/37
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting device includes a first light emitting diode (LED) emitting a first light emission of at least a first wavelength, and a second light emitting diode emitting a second light emission of at least a second wavelength. The second LED is placed in close proximity to the first LED such that after a mixing length from the first and second LEDs, a combination of the first and second lights is perceived as one color in the human vision. In use, the first and second LEDs are alternately driven by a power source in the time domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.