White light illumination system with narrow band green phosphor and multiple-wavelength excitation
US9476568B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2014 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Sep 2, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A white light illumination system may comprise: a phosphor package; a first radiation source for providing co-excitation radiation to the phosphor package, the source emitting in wavelengths ranging from about 250 nm to about 410 nm; and a second radiation source for providing co-excitation radiation to the phosphor package, the source emitting in wavelengths ranging from about 410 nm to about 540 nm; wherein the phosphor package is configured to emit photoluminescence in wavelengths ranging from about 440 nm to about 700 nm upon co-excitation from the first and second radiation sources, and wherein the phosphor package comprises at least one narrow band green phosphor with a photoluminescence peak with a full width at half maximum of less than 60 nm, and wherein the narrow band green phosphor is configured to emit photoluminescence in wavelengths ranging from about 500 nm to about 550 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.