Light emitting device
US9368696B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2015 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Jun 23, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/852
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A light emitting device includes: a first blue light emitting element and a second blue light emitting element, peak wavelengths of which are different from each other, and a fluorescent substance layer comprising: a green fluorescent substance, which is excited by emission lights from the first blue light emitting element and the second blue light emitting element to emit green lights having emission spectrums having a first wavelength indicating a first intensity and a second wavelength indicating a second intensity smaller than the first intensity, respectively; and a red fluorescent substance, which has an absorption spectrum in which absorption is less in the second wavelength than in the first wavelength and which is excited by the emission lights from the first blue light emitting element and the second blue light emitting element to emit red lights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.