Electronic flashing device having a specific type of main capacitor sensing circuit
 A series circuit of a pass condenser and a neon lamp operate as a voltage detecting device. A resistance voltage dividing circuit has a connecting point between voltage dividing resistances which are connected to the connecting point between the pass condenser and the neon lamp of the voltage detecting device. The series circuit and resistance voltage dividing circuits are provided between a power source boosting circuit and a main condenser so that, when the main condenser has been fully charged, the neon lamp will conduct, causing a charge completion signal to be outputted and thereby the charging operation will be stopped. When the charge voltage of the main condenser is a flash possible voltage, the neon lamp will conduct for only a short time and the charge completion signal will be output accordingly for only a short time in the form of a pulse. The voltage detecting device thus outputs three types of signals over a single output line to indicate one of three possible charging states. 
Olympus Optical Co., Ltd.
H
H05B
inventional
Hiroshi Akira
Yamada Watanabe