Wavelength conversion member, light source, illumination device, and method for manufacturing wavelength conversion member
US11130909B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Aug 7, 2018 |
| Grant date | Sep 28, 2021 |
| Priority date | — |
| Expiry date | Sep 20, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wavelength conversion device of the present disclosure includes a substrate, a phosphor layer that has a matrix containing zinc oxide and phosphor particles embedded in the matrix and that is supported by the substrate, a dielectric layer disposed between the substrate and the phosphor layer, and a protective layer that is disposed between the phosphor layer and the dielectric layer and that has an isoelectric point equal to or larger than 7. A main surface of the substrate includes, for example, first and second regions. The phosphor layer covers, for example, only the first region out of the first and second regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.