Tuning of emitter with multiple LEDs to a single color bin
US8773024B2 · kind B2 · utility
30Cited by
24References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2013 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Nov 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The color of an LED-based lamp can be tuned to a desired color or color temperature. The lamp can include two or more independently addressable groups of LEDs associated with different colors or color temperatures and a total-internal-reflection (TIR) color-mixing lens to produce light of a uniform color by mixing the light from the different groups of LEDs. The color of the output light is tuned by controllably dividing an input current among the groups of LEDs. Tuning can be performed once, e.g., during manufacture, and the lamp does not require active feedback components for maintaining color temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.