Ready-to-flash condition indicating device for a camera

Details Ready-to-flash condition indicating device for a camera Ready-to-flash condition indicating device for a camera

1981-05-04

1983-01-25

Perkey, William B.

354145, 354289, G03B 1505, G03B 726

Patent

active

043700420

ABSTRACT:
A device in a camera is provided with a light-emitting element driven by a signal current from an electronic flash device to emit light and indicate the ready-to-flash condition of the electronic flash device, a current control circuit series-connected to the light-emitting element to control a current flowing to the light-emitting element, an integrated circuit operative in response to the signal current from the electronic flash device, and a limiting circuit for detecting a voltage related to the combined voltage of the light-emitting element and the current control circuit and limiting an applied voltage applied to the integrated circuit so as to be below a predetermined value when said voltage exceeds a predetermined value.

REFERENCES:
patent: 4295717 (1981-10-01), Kitigawa

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