Light emitting device with a thermal insulating and refractive index matching material
US8134292B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 2005 |
| Grant date | Mar 13, 2012 |
| Priority date | — |
| Expiry date | Dec 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8515
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A light emitting device has a light emitting diode (LED) encapsulated by an encapsulant member. The encapsulant member includes a luminescent material, such as a phosphor, and a thermal insulating material. The thermal insulating material effectively insulates the luminescent material from the heat generated by the LED. A thermal conducting material is desirably placed in thermal contact with a back side of the LED to assist heat dissipation. The encapsulant member may be formed in two separate layers with the luminescent material forming a luminescent layer, and the thermal insulating material forming a thermal insulation layer disposed between the luminescent layer and the LED.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.