Light emitting device
US10770629B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2017 |
| Grant date | Sep 8, 2020 |
| Priority date | — |
| Expiry date | Jan 31, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8513
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A light emitting device includes: a substrate (40); blue light emitting elements (10) arranged on the main surface of the substrate (40); and a phosphor sheet (30) containing a phosphor that is excited by emission light from the blue light emitting elements and emits excitation light, the phosphor sheet (30) being disposed above the blue light emitting elements (30), wherein the blue light emitting elements (10) includes first blue light emitting elements (11) which emit first emission light having a first wavelength taken as a peak wavelength of a light emission spectrum, and second blue light emitting elements (12) which emit second emission light having a second wavelength taken as a peak wavelength of a light emission spectrum, and the second wavelength being a longer wavelength than the first wavelength by a wavelength difference of at least 10 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.