LED illumination device and lamp unit thereof
US8167466B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2009 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Jun 20, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED illumination device includes a lampshade, and a plurality of lamp units mounted on the lampshade. Each lamp unit includes a light-emitting module having a plurality of light sources and a heat sink arranged above the light-emitting module. The heat sink includes an elongated base and a plurality of fins on the base. The base has an outer convex surface formed at a top side thereof and an opposite inner concave surface formed at a bottom side thereof. The fins extend outwardly from the convex surface of the base. The concave surface defines an elongated recess extending along an axial direction of the base. Two opposite free ends of the base are spaced from each other and cooperatively define a light emitting window below the concave surface. The light sources are received in the recess and thermally attached to the concave surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.