| 摘要 |
The apparatus for operating a discharge lamp in the present invention can easily set the lighting efficiency of each of all discharge lamps at a given value by decreasing the crest factors of the discharge lamps to a given level or lower, and narrowing the variance between the crest factors. Pulse current output from the diode circuit (16) is supplied to the inverter circuit (20) via the partial smoothing circuit (18), where the current is converted into a high-frequency current. The high-frequency is further changed to a high voltage by the resonance circuit (20), and the high voltage is supplied to the discharge lamps (261, 262) via choke coils (L01, L02) to light the lamps. The discharge lamps (261, 262) are connected in common to the resonance circuit (22) only, and therefore the crest factors of the lamps can be commonly adjusted by the value of each of the coil (L12) and capacitor (C15) of the resonance circuit (22). Thus, the variance of the crest factors of the discharge lamps can be narrowed, and the crest factors can be easily decreased to a given level or lower. <IMAGE> |
