| 摘要 |
An AC power generating apparatus for lighting a discharge lamp has a smoothing circuit with an electrolytic capacitor therein for smoothing ripples included in a DC voltage supplied from a power source. The apparatus further has a switching device and a transformer for transforming a smoothed voltage by turning on and off application of the smoothed voltage to the transformer thereby to supply AC electric power for activating a discharge lamp. A capacitor is connected in parallel with the electrolytic capacitor. This parallel capacitor is located inside an area surrounded by the transformer, the switching device and the electrolytic capacitor to reduce a circuit area where electromagnetic radiation noise is generated.
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