Method and apparatus for maximizing the sustainable flash of...

Details Method and apparatus for maximizing the sustainable flash of... Method and apparatus for maximizing the sustainable flash of...

2010-07-16

2011-11-15

Ometz, David (Department: 2622)

Television

Camera, system and detail

Power supply

C348S371000, C315S20000A, C315S24100S, C396S301000, C396S205000

Reexamination Certificate

active

08059192

ABSTRACT:
A method and apparatus for maintaining a maximum sustained flash current over the whole length of a flash using a programmable current drive in a handheld portable device powered by a battery. The method involves measuring the battery voltage before and after a flash is initiated and calculating the equivalent series resistance (ESR) of the battery. The calculated ESR is then used to adjust the flash current. The process may be repeated to correct for errors in the flash current.

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patent: 2003032331 (2003-01-01), None
U.S. Appl. No. 11/863,718 Notice of Allowance dated Mar. 30, 2010.

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