Compact electrodeless fluorescent lamp with improved cooling
US6555954B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 14, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Feb 7, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J65/048
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention comprises a compact electrodeless fluorescent lamp that includes a transparent envelope containing a fill of inert gas along with a vaporizable metal such as mercury. An induction coil is operated by a driver circuit, and is positioned inside of a reentrant cavity in the envelope with an adjacent permeable magnetic field manipulation structure having a shunting surface ending at a shunting surface periphery. A thermally and electrically conductive primary cooling structure is positioned adjacent the magnetic field manipulation structure to extend within the shunting surface periphery while being separated from the induction coil thereby. A further component cooling structure is provided to at least partially enclose the driver circuit connected to the induction coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.