| 摘要 |
A system for energizing a fluorescent lamp by a current having an adjustable level of magnitude that is independent of the voltage across the fluorescent tube, which current is non-pulsing with the polarity being periodically changed at the conventional, 60 Hz rate of the AC power line by an electronic commutator, which commutator provides switching of the polarities at very sharp rise times, allowing use of relatively small components with the low frequencies, and the power factor of the input current is processed to a desired power factor. The constant current magnitude is adjustable over a wide range, which current settings are independent of the AC power line voltage and independent of the voltage across the lamp.
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