Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2005-06-08
2008-05-20
Tran, Thuy V. (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S224000, C315S291000
Reexamination Certificate
active
07375472
ABSTRACT:
A circuit according to the present invention is used for driving a photoflash diode and comprises a current sink, a feedback circuit, and a DC-DC converter. The current sink is coupled to the photoflash diode for controlling the current through the photoflash diode. The feedback circuit receives a feedback signal indicative of the electrical condition of said first current regulator. The DC-DC converter is coupled to an external power source and the feedback circuit for powering the photoflash diode so as to control the electrical condition of the current sink to a predetermined value.
REFERENCES:
patent: 2003/0117087 (2003-06-01), Barth et al.
patent: 2004/0164685 (2004-08-01), Dygert
patent: 2004/0251854 (2004-12-01), Matsuda et al.
patent: 2005/0093488 (2005-05-01), Hung et al.
patent: 2005/0231133 (2005-10-01), Lys
patent: 2005/0243041 (2005-11-01), Vinn
patent: 2006/0132061 (2006-06-01), McCormick et al.
Han Mingkwong
Hou Xiachua
Lin Chun-Hsi
Popescu-Stanesti Vlad
Wong Footshen
02Micro International Limited
Le Tung X
Tran Thuy V.
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