| 摘要 |
A discharge lamp lighting device comprises a discharge lamp (1) with a pair of filaments (101a, 101b), an inductive balast (2) coupled with said lamp (1) and a power supply, a non-linear dielectric element (4) coupled across said lamp (1), a semiconductor switch (3) coupled substantially parallel with said non-linear dielectric element (4), and delay means ((6,7,303c,304b,303d), (8,303c,304b,303b), (9,10,60), (6,11)) for shifting firing phase of said semiconductor switch (3) so that a spike voltage induced by said non-linear dielectric element increases gradually for every cycle of a power supply voltage.
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