High intensity electrodeless low pressure light source driven by a transformer core arrangement
US5834905A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Mar 27, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J65/048
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric lamp assembly includes an electrodeless lamp having a closed-loop, tubular envelope enclosing mercury vapor and a buffer gas at a pressure less than about 0.5 torr, a transformer core disposed around the lamp envelope, an input winding disposed on the transformer core and a radio frequency power source coupled to the input winding. The radio frequency source supplies sufficient radio frequency energy to the mercury vapor and the buffer gas to produce in the lamp envelope a discharge having a discharge current equal to or greater than about 2 amperes. The electrodeless lamp preferably includes a phosphor on an inside surface of the lamp envelope for emitting radiation in a predetermined wavelength range in response to ultraviolet radiation emitted by the discharge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.