Phosphor layer composition, phosphor member, light source device, and projection device
US10920139B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2018 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Jun 22, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/109
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A phosphor layer composition, phosphor member, light source device, and projection device are provided that are capable of restraining reflection or scattering at interfaces between phosphor particles and a binder to improve the excitation-light absorption by, and the external quantum efficiency of, the phosphor particles. The present invention, in an aspect thereof, is directed to a phosphor layer composition including: phosphor particles 111 absorbing excitation light and emitting prescribed fluorescence; and a binder 112 composed of a translucent gel containing a metal alkoxide or a mixture of a metal alkoxide and a metal oxide, wherein the phosphor particles 111 are dispersed in the binder 112, and the phosphor particles 111 and the binder 112 differ in refractive index by 0.3 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.