Wavelength conversion member and light emitting device using the same
US9605201B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 2015 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Sep 20, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V9/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting device can include a wavelength conversion member with a high light extraction efficiency and capable of achieving a light emitting device with high performance. The wavelength conversion member can include phosphor particles formed from a base material and an activator agent added thereto and having an irregular surface; a matrix material including a light-transmitting material, the matrix material being present between the phosphor particles; and additive particles formed from the base material and adhering to the irregular surface of the phosphor particle to form a particle structure having an irregular surface including a projected section and a recessed section. The difference between the projected section and the recessed section of the irregular surface of the particle structure is larger than the difference between a projected section and a recessed section of the irregular surface of the phosphor particle without the additive particles adhering thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.