Stack of layers comprising luminescent material, a lamp, a luminaire and a method of manufacturing the stack of layers
US9631793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2013 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Mar 26, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stack of layers 100, a lamp, a luminaire and a method of manufacturing a stack of layers is disclosed. The stack of layers 100 comprises a first outer layer 102, a second outer layer 106 and a luminescent layer 104. The first outer layer 102 and the second outer layer 106 are of a light transmitting polymeric material and have an oxygen transmission rate lower than 30 cm3/(m2-day) measured under standard temperature and pressure (STP). The luminescent layer 104 is sandwiched between the first outer layer 102 and the second outer layer 106 and comprises a light transmitting matrix polymer and a luminescent material 108 being configured to absorb light according to an absorption spectrum and convert a portion of the absorbed light towards light of a light emission spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.