Multiple discharge lamp lighting apparatus
US7567039B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2005 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Apr 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F38/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multiple discharge lamp lighting apparatus is provided which achieves stable and uniform lamp currents in a plurality of discharge lamps without a ballast element at the secondary side of an inverter transformer. The multiple discharge lamp lighting apparatus includes an inverter, and a plurality of inverter transformers each of which has a discharge lamp connected at a secondary winding thereof. A balance inductance element is provided between the primary side wirings of any adjacent pair of the plurality of inverter transformers. Each of the inverter transformers includes a tight coupling section and a loose coupling section, which function as a balance coil and an impedance element, respectively, whereby the lamp currents of the discharge lamps are stabilized and equalized without using a high withstand voltage element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.