Apparatus for tuning of emitter with multiple LEDs to a single color bin
US8513900B2 · kind B2 · utility
4Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 2011 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Dec 7, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8513
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus is used to tune the color produced by an LED-based lamp to a desired color or color temperature. To support tuning, the lamp can include two or more independently addressable groups of LEDs. Color or color temperature is tuned by controllably dividing an input current among the groups of LEDs. The apparatus determines an optimal division of the input current based on a linear interpolation between measured values of color or color temperature produced by at least two different divisions of the input current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.