Arrangement for displaying operation of booster circuit for flas

Details Arrangement for displaying operation of booster circuit for flas Arrangement for displaying operation of booster circuit for flas

1988-12-12

1990-07-17

Boudreau, Leo H.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315209R, 315DIG4, 315DIG7, 315291, H05B 4132

Patent

active

049423401

ABSTRACT:
In the oscillating booster circuit of an electronic flash device for a camera arranged to boost the output of a DC low voltage source by a blocking oscillator circuit and to make it into a DC high voltage through a high voltage rectifier diode before a main capacitor of the flash device is charged therewith, a booster circuit operation display arrangement is operated solely by the spike voltage of the booster circuit to stably display the operating state of the booster circuit.

REFERENCES:
patent: 4404497 (1983-09-01), Takematsu
patent: 4430602 (1984-02-01), Ohmori
patent: 4441774 (1984-04-01), Kazami et al.
patent: 4495447 (1985-01-01), Shigemi
patent: 4555648 (1985-11-01), Iida et al.
patent: 4602194 (1986-07-01), Numata
patent: 4610521 (1986-09-01), Inoue
patent: 4626748 (1986-12-01), Nakamura
patent: 4628229 (1986-12-01), Inoue
Japanese Laid-Open Patent Application Sho 59-148298.

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