Light-emitting device and light-emitting apparatus
US9518215B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2015 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Feb 10, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8516
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-emitting device includes a photoluminescent layer that emits light containing first light, a light-transmissive layer located on or near the photoluminescent layer, and one or more reflectors. A submicron structure is defined on at least one of the photoluminescent layer and the light-transmissive layer. The one or more reflector are located outside the submicron structure. The submicron structure includes at least projections or recesses and satisfies the following relationship:λa/nwav-a<Dint<λa where Dint is a center-to-center distance between adjacent projections or recesses, λa is the wavelength of the first light in air, and nwav-a is the refractive index of the photoluminescent layer for the first light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.