Lamp driving apparatus having balance circuit units for a display
US7633240B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2007 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | May 13, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/245
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lamp driving apparatus wherein a plurality of two-winding balance circuits are connected to a plurality of parallel-connected lamp groups so that all of the lamps may be illuminated even though ambient conditions cause some of the lamps to have low resistance. Capacitors are connected to first electrodes and certain of the balance coil windings are connected to second electrodes of one of the lamp groups while, in a second lamp group, others of the balance coil windings are connected to the first electrodes and capacitors are connected to the second electrodes thereof, current flowing through balance coil windings to some lamps being affected by current flowing through balance coil windings to other lamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.