Composite high reflectivity layer
US8680556B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2012 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Mar 8, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/854
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A high efficiency light emitting diode with a composite high reflectivity layer integral to said LED or package to improve emission efficiency. One embodiment of a light emitting diode (LED) chip comprises a LED and a composite high reflectivity layer integral to the LED to reflect light emitted from the active region. One embodiment of a LED package comprises a LED mounted on a substrate with an encapsulant over said LED and a composite high reflectivity layer arranged to reflect emitted light. The composite layer comprises a plurality of layers such that at least one of said plurality of layers has an index of refraction lower than the encapsulant and a reflective layer on a side of said plurality of layers opposite the LED. In some embodiments, conductive vias are included through the composite layer to allow an electrical signal to pass through the layer to the LED.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.