Power supply unit for electronic flash

Details Power supply unit for electronic flash Power supply unit for electronic flash

1983-07-01

1985-07-23

Moore, David K.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315171, 315176, 315160, 320 1, H05B 4132, H02M 306

Patent

active

045305501

ABSTRACT:
A power supply unit for electronic flash includes a plurality of charging units connected to a main capacitor of an electronic flash through diodes which prevent a reverse current flow. Each charging unit includes a d.c. source and a booster converter. An efficient utilization of the source battery is attained by reducing loading upon each source. The use of components of reduced capacity enables a reduction in the size of the overall unit. A single power switch enables a simultaneous initiation of the charging of the main capacitor by all of the charging units. When the main capacitor is charged to a given value, disable means are simultaneously operated in response to an output from charging voltage detecting means, thus simultaneously ceasing the charging operation of the charging units.

REFERENCES:
patent: 3414765 (1968-12-01), McKnight et al.
patent: 4039898 (1977-08-01), Iwata et al.
patent: 4251753 (1981-02-01), Kondo
patent: 4396870 (1983-08-01), Ikeda
patent: 4430602 (1984-02-01), Ohmori

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