Abstract
A filament driver is located between a fluorescent lamp and a phase controlled dimmer control. The filament driver comprises a transformer with the primary winding connected to the output of the dimmer control. The secondary winding is connected to the cathode filaments of the lamp and a high pass filter is arranged to pass only the harmonic components of the output voltage from the dimmer control to the filaments.
| Original language | English |
|---|---|
| Patent number | 224311 |
| IPC | H05B 41/39,H05B 41/16 |
| Priority date | 26/05/87 |
| Publication status | Published - 30 Jan 1990 |
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