Method and circuit for repetitively firing a flash lamp or...

Details Method and circuit for repetitively firing a flash lamp or... Method and circuit for repetitively firing a flash lamp or...

2005-11-15

2005-11-15

Wong, Don (Department: 2821)

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Flashers

C315S224000, C315S24100S, C315S130000, C315S312000, C315S24100S, C340S293000, C340S330000, C340S326000, C340S908000

Reexamination Certificate

active

06965203

ABSTRACT:
Disclosed is a method and circuit for repetitively firing a flash lamp. The method utilizes a power supply having a periodic voltage signal. The method times the discharge of the flash lamp to occur when the power supply signal is below the flash lamp self extinguishing voltage such that the flash lamp de-ionizes while the power supply signal remains below the self extinguishing voltage, thus preventing afterglow. The circuit utilizes a means for detecting when the voltage of the power supply voltage signal falls below the self extinguishing voltage to trigger the flash lamp. An additional embodiment adds a means for interrupting current flow in the flash lamp before the voltage across a storage capacitor falls below said self extinguishing voltage. The method and circuit may be extrapolated for use with other electromechanical devices.

REFERENCES:
patent: 4967177 (1990-10-01), Nguyen
patent: 5128591 (1992-07-01), Bocan
patent: 5191261 (1993-03-01), Mass
patent: 5594308 (1997-01-01), Nuckolls et al.
patent: 5886620 (1999-03-01), Stewart et al.
patent: 6330258 (2001-12-01), Kawamura
patent: 6529391 (2003-03-01), Yoshinaga et al.

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