System and method for providing color light sources in proximity to predetermined wavelength conversion structures
US8905588B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2014 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Apr 18, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optical device includes a light source with at least two radiation sources, and at least two layers of wavelength-modifying materials excited by the radiation sources that emit radiation in at least two predetermined wavelengths. Embodiments include a first plurality of n radiation sources configured to emit radiation at a first wavelength. The first plurality of radiation sources are in proximity to a second plurality of m of radiation sources configured to emit radiation at a second wavelength, the second wavelength being shorter than the first wavelength. The ratio between m and n is predetermined. The disclosed optical device also comprises at least two wavelength converting layers such that a first wavelength converting layer is configured to absorb a portion of radiation emitted by the second radiation sources, and a second wavelength converting layer configured to absorb a portion of radiation emitted by the second radiation sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.