Orange-emitting phosphor
US7579765B2 · kind B2 · utility
1Cited by
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5Claims
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Key dates
| Filing date | Jul 9, 2008 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Jul 9, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/77922
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An orange-emitting phosphor that emits at a high luminance when being excited by blue light emitted by a blue light-emitting diode is provided. This orange-emitting phosphor is an alkaline-earth metal silicate-based phosphor represented by a general formula of a(Sr1-xEux(1-y)Ybxy)O.SiO2. In the formula, a is provided as 2.9≦a≦3.1, x is provided as 0.005≦x≦0.10, and y is provided as 0.001≦y≦0.1. An orange-emitting phosphor that emits orange at a high luminance and produces no harmful gas is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.