Phosphor blends for generating white light from near-UV/blue light-emitting devices
US6685852B2 · kind B2 · utility
145Cited by
5References
31Claims
0Family size
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Key dates
| Filing date | Apr 27, 2001 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Dec 31, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Phosphor blends are disclosed that are capable of absorbing electromagnetic radiation having wavelengths in the range from about 315 nm to about 480 nm. These blends are mixtures of phosphors selected from the group consisting of Sr2P2O7:Eu2+, Mn2+, (Ca,Sr,Ba)5(PO4)3(F,Cl,OH):Eu2+,Mn2+, 3.5 MgO.0.5MgF2.GeO2:Mn4+, Sr4Al14O25:Eu2+, (Sr,Ba,Ca)5(PO4)3(Cl,OH):Eu2+, (Ba,Ca,Sr)2MgAl16O27:Eu2+, and (Ba,Ca,Sr)2MgAl16O27:Eu2+,Mn2+. White light sources are obtained by applying a phosphor blend over at least one LED that is capable of emitting electromagnetic radiation in the above-noted wavelength range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.