Flash device

Details Flash device Flash device

2004-11-30

2008-11-25

Koval, Melissa Jan (Department: 2862)

Photography

With object illumination for exposure

Having exposure synchronizer

C348S371000, C362S011000

Reexamination Certificate

active

07457536

ABSTRACT:
A flash device includes at least one light emitting unit is attachable to a plurality of connection portions. A shielding portion shields the connection portion without an attached light emitting unit. A capacitor accumulates an electric charges and is charged by a charging circuit. A control circuit includes judges both (1) whether or not all the plurality of connection portions are shielded and (2) whether or not the light emitting unit is attached to at least one of the plurality of connection portions, and permits the capacitor to be charged if both all the connection portions are shielded and the light emitting unit is attached to at least one of the plurality of connection portions.

REFERENCES:
patent: 4192590 (1980-03-01), Kitaura
patent: 2002-229106 (2002-08-01), None

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