Light emitting devices and systems having tunable chromaticity and methods of tuning the chromaticity of light emitting devices and systems
US8740663B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2012 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Nov 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/395
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting device package assembly includes a light emitting device package body, and first, second and third white light emitting devices on the package body, each of the first, second and third white light emitting devices emits light when energized having a chromaticity that falls within a respective one of first, second and third non-overlapping chromaticity regions in a two dimensional chromaticity space. The first, second and third chromaticity regions are spaced apart in the two dimensional chromaticity space by respective regions having at least the size of a seven step MacAdam ellipse. Related solid state luminaires and methods are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.