Electric flash apparatus

Details Electric flash apparatus Electric flash apparatus

1990-04-23

1991-08-06

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315340, 354416, H05B 4114

Patent

active

050380800

ABSTRACT:
An electric flash apparatus of the present invention has an Insulated Gate Bipolar Transistor (I.G.B.T.) for controlling the light emission actuation of the strobe tube (Xe), which is connected to the strobe tube in series, a switching element (11) for supplying a driving signal to the I.G.B.T. from a main capacitor (C.sub.M), and a gate circuit (14) for controlling actuation of the switching element (11), which is connected across both ends of the strobe tube (Xe), and is actuated by a switch circuit (17) for actuating a trigger circuit (20). And the actuation of the switching element (11) is kept by turning on of the I.G.B.T.

REFERENCES:
patent: 4697906 (1987-10-01), Kobayashi et al.
patent: 4839686 (1989-06-01), Hosomizu et al.

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