Frishauf, Holtz, Goodman, Langer & Chick
Electronic flash apparatus using gate controlled switching device directly driven by CPU
 An electronic flash apparatus having a main capacitor for storing charges, a discharge light emitting tube for emitting light in accordance with the charges stored in the main capacitor, a CPU for performing camera sequence control, and an IGBT coupled to each of the discharge light emitting tube and the CPU. The CPU includes a light emission control terminal for controlling a light emission timing of the discharge light emitting tube and the CPU is supplied with a CPU operation voltage. The IGBT includes a gate terminal connected to the light emission control terminal of the CPU, a collector terminal, and an emitter terminal, wherein, responsive to the light emission control terminal inputting to the gate terminal a control voltage substantially equivalent to the CPU operation voltage, a channel is formed between the collector terminal and the emitter terminal and the charges of the main capacitor are discharged through the discharge light emitting tube. 
Olympus Optical Co., Ltd.
H
H05B
inventional
Hiroshi
Yamada