| 摘要 |
<p>An electric discharge lamp capable of preventing flickering at a low dimming ratio and emitting stable light in a wide dimming range. A drive signal generation circuit (11) controls the drive frequency of the electric discharge lamp (13) in accordance with an output signal of a dimming signal generation circuit (10). For this, the drive signal generation circuit (11) generates a first and a second pulse drive signal (11a, 11b) and a third pulse drive signal (11c) for driving a flicker preventing circuit (14) consisting of a resistor (R) connected in parallel to a primary winding (L1) of a pulse transformer (12) and a switching element (S3).</p> |
