| 摘要 |
In an electronic flash device, in order to control the discharge through a flash lamp for converting the energy stored on a main discharge capacitor into light; that is, in order to control the flash duration, a series circuit consisting of a main switching element, a commutation capacitor for commutating the main switching element after the flash lamp has been lighted and an auxiliary switching element is connected in series to the main discharge capacitor. When the flash lamp is triggered or lighted or when the main switching element is commutated, the commutation capacitor is charged through the series circuit.
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