| 摘要 |
<p>An electric flash device comprises a d.c. source A, voltage converting means B for converting the direct current source voltage to an alternating current voltage, a rectifier C for rectifying said alternating current voltage and producing a high direct current voltage, electrical energy storing means D including a main storage capacitor 20, trigger signal generating means E, and flash light F supplied from the main capacitor 20. The oscillator circuit of the voltage converter is controlled by oscillation starting means OS and oscillation stopping means ST. The duration of oscillation is controlled by oscillation timing control means, e.g. the time constant circuit 40, 41. <IMAGE></p> |
