High-brightness yellow-orange yellow phosphor for warm white LED
US8110123B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2008 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Jul 26, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A high-brightness yellow-orange yellow phosphor for use in warm white LED (light emitting diode), the high-brightness yellow-orange yellow phosphor comprises a substrate based on a rare-earth garnet and cerium for activating said substrate. The high-brightness yellow-orange yellow phosphor has the substances of Li+1, Mg+2 and N−3 contained therein so that the overall stoichiometric equation of the substrate is: Σ(Ln)3Al5−xLi(x+y)Mg(x+y)O12−3yN3y and, the high-brightness yellow-orange yellow phosphor radiates in a visible orange yellow band at λ=538˜569 nm when activated by a shortwave light from an InGaN semiconductor heterostructure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.