Quantum dot, manufacturing method of the dot, and compact, sheet member, wavelength conversion member and light emitting apparatus using the quantum dot
US10815425B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2018 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Sep 14, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/95
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A quantum dot has a property that, when subjected to a GC-MS qualitative analysis at 350° C., octadecene (ODE) is present while oleylamine (OLA) is absent. A light emitting apparatus has a fluorescent layer covering and disposed immediately above a light emitting side of a light emitting device. The fluorescent layer, which is disposed immediately above the light emitting device, is formed of a resin with quantum dots dispersed therein. Deteriorations of light emission intensities at respective RGB peak wavelengths of the light emitting device after light emission for 1000 hours at 85° C. are all within 30% of a light emission intensity of the light emitting device before the light emission. Black discoloration caused by the deteriorations of the light emission intensities at the respective RGB peak wavelengths of the light emitting device does not occur in the resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.