| 摘要 |
PURPOSE: The electronic ballast of an electrode-less lamp is provided to be stably operated with respect to electromagnetic interference by separating a power-factor adjustor and a lamp-ballast. CONSTITUTION: A power-factor adjustor(300) removes noises from power applied from a power supply unit. The power-factor adjustor maintains a frequency band which is filtered to a desired frequency band, and performs a variation based on a pre-set value in order to output a frequency and a voltage. A lamp-ballast and an electrode-less lamp are installed in one case. The lamp-ballast filters the frequency and the voltage of the power-factor adjustor and oscillates the frequency and the voltage to a pre-set level size. |
