Discharge tube lighting apparatus
US7973497B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2009 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Feb 25, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2828
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discharge tube lighting apparatus includes a converter that converts a voltage received from an alternating-current or direct-current power supply into a predetermined direct-current voltage and an inverter that converts an output voltage of the converter into an alternating-current voltage having a predetermined frequency. The inverter performs burst control based on an externally input dimming signal. The converter operates regardless of the active or inactive period of the burst control of the inverter and performs negative feedback control in response to a detection signal of a tube current in the active period of the inverter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.