White light-emitting lamp for illumination and illuminating device using the same
US8426882B2 · kind B2 · utility
3Cited by
2References
15Claims
0Family size
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Key dates
| Filing date | Sep 19, 2008 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Jan 6, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A white light emitting lamp 1 includes a phosphor layer 5 which emits white light by being excited by light emitted from a semiconductor light emitting element 2. A transparent resin layer 4 is interposed between the semiconductor light emitting element 2 and the phosphor layer 5. The phosphor layer 5 contains, as a green phosphor, a rare earth borate phosphor activated by trivalent cerium and terbium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.