Wavelength conversion member, light source and lighting device
US10794569B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2018 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Feb 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wavelength conversion member of the present disclosure includes a first matrix, phosphor particles embedded in the first matrix, and at least one selected from the group consisting of first filler particles embedded in the first matrix and surface coating layers respectively covering surfaces of the phosphor particles. The wavelength conversion member satisfies at least one relationship selected from the group consisting of |n3−n1|>|n1−n2| and |n4−n1|>|n1−n2| wherein n1 is a refractive index of the first matrix, n2 is a refractive index of the phosphor particles, n3 is a refractive index of the first filler particles, and n4 is a refractive index of the surface coating layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.