Discharge lamp unit with RF shield primary coil
US6049163A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1998 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Jan 27, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/284
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discharge lamp unit has a housing provided with a lamp socket fitted thereon and accommodating a printed circuit board with a lamp lighting circuit and a high voltage generating transformer assembly mounted thereon. The transformer assembly consists of a primary coil being a plate conductor spirally wound around a coil case containing a secondary coil-wound bobbin with a core inserted in a hollow center thereof. The discharge lamp unit is formed as a single solid device by potting all of the components in the housing with insulating resin poured in a melted state and solidified therein. This unit is easy to mount with no need for laying a high-voltage between the circuitry and the lamp socket, and includes a very compact and light transformer having an increased conversion efficiency of the primary and secondary coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.