| 摘要 |
<p>A light emitting voltage is applied to the anode (11) and the cathode (13) of a flashing discharge tube (3) (xenon flash lamp) by a charge/discharge capacitor (17). When the voltage of the charge/discharge capacitor (17) does not reach a specified value, for example, a voltage normally required for the light emitting operation of the flashing discharge tube until a specified time, for example, time normally required for charging the capacitor (17), a timer circuit (39) generates a charge stop signal (S3). This signal (S3) allows a control circuit (35) to off-control the switch of a power supply (33) to thereby stop charging the charge/discharge capacitor (17).</p> |
