Control circuit and flash system using same
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United States of America Patent
Stats
-
Aug 16, 2011
Grant Date -
Apr 29, 2010
app pub date -
May 4, 2009
filing date -
Oct 27, 2008
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control circuit is configured to control the charge and discharge of a flash unit. The flash unit includes an anode, a cathode, and a trigger electrode. The control circuit includes a charging circuit and a triggering circuit. One terminal of the charging circuit is coupled to a charging terminal and another terminal is coupled to the anode and the cathode. One terminal of the triggering circuit is coupled to a triggering terminal, another terminal is couple to the trigger electrode. The charging circuit includes a first capacitor coupled to the cathode and a second capacitor coupled to the anode. When the charging terminal receives a charging voltage and the triggering terminal receives a high-level voltage, three times charging voltage is formed between the anode and the cathode; then the flash unit generates a flash.
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