Electric flash device
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United States of America Patent
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Oct 6, 1987
Grant Date -
N/A
app pub date -
Sep 26, 1986
filing date -
Sep 27, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electric flash device for photography is controlled of its light radiation of a flash tube by a transistor, which is connected in series with the flash tube and is given its base current through a parallelly connected capacitor and resistor, and when the transistor turns OFF, an electric charge stored in the capacitor is applied across the base and the emitter of the transistor as a reverse bias.
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