LED lamp with quantum dots layer
US9142732B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2013 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Jun 21, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8512
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting device 100 includes a light source 101, a first phosphor layer 102 disposed directly or indirectly on top of the light source 101, a first quantum dots layer 103 disposed directly on top of the first phosphor layer 101, and a second phosphor layer 104 disposed directly on top of the first quantum dots layer 103. The first quantum dots layer 103 includes a population of quantum dots 106 dispersed in a first matrix material 107. Each of the first and second phosphor layers 102, 104 includes a population of conventional phosphor particles 105. Another embodiment is a lighting device 400 that includes a light source 401 and a wavelength-shifting phosphor layer 402 disposed on top of the light source 401. The wavelength-shifting phosphor layer 402 includes a population of quantum dots 404 and a population of phosphor particles 403 both dispersed in a matrix material 405.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.