| 摘要 |
A method for driving a discharge lamp (1) having lamp electrodes (2, 3), at least one of said electrodes (2) being implemented as a filament having two electrode terminals (2a, 2b), comprises the following steps: during a first time interval (t1-t2), generating a discharge lamp current (I L) in said discharge lamp (1); during a second time interval (t2-t3), interrupting the discharge lamp current (I L); during both intervals (t1-t3), passing an electrode heating current (I C) through said one electrode (2); wherein, during said first time interval (t1-t2), the discharge lamp current magnitude (I L1) is less than 90% of the nominal current magnitude (I NOM); and wherein the electrode heating current (I C) is set such that the hot resistance R H of said one electrode (2) is within 4.3 to 4.7 times the cold resistance R C; wherein during the second time interval, the electrode heating current is larger than during the first time interval.
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