Basic halogen convertor IC

Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit

Reexamination Certificate

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Details

C315S291000, C315S307000, C315S247000, C315S2090SC

Reexamination Certificate

active

07321201

ABSTRACT:
A driving circuit for providing a control signal to a power semiconductor device for providing power to a filament lamp, said driving circuit comprising an oscillator for generating said control signal. The driving circuit may further comprise a soft start circuit which controls said oscillator so as to avoid excessive current in said lamp at start-up; a voltage compensation circuit which controls said oscillator so as to compensate for variations in load; a shutdown circuit for shutting down and automatically restarting said oscillator in response to a fault condition; an adaptive dead time circuit which controls said oscillator for providing cool running of said power semiconductor device; and/or a dimming circuit which controls said oscillator for driving said lamp. The driving circuit and its control circuitry may be implemented in an integrated circuit.

REFERENCES:
patent: 3774074 (1973-11-01), Souvay
patent: 5796215 (1998-08-01), Parry et al.
patent: 5925990 (1999-07-01), Crouse et al.
patent: 6002213 (1999-12-01), Wood
patent: 6008593 (1999-12-01), Ribarich
patent: 6617805 (2003-09-01), Ribarich et al.
patent: 7109665 (2006-09-01), Green
patent: 2003/0102823 (2003-06-01), Ribarich
patent: 2244608 (1991-12-01), None
patent: 5-74581 (1993-03-01), None
patent: 632588 (1994-11-01), None
patent: 10-223381 (1998-08-01), None
patent: 2001-505358 (2001-04-01), None
patent: 99/12187 (1999-03-01), None
patent: 00/35252 (2000-06-01), None
English Translation of Taiwan Official Letter issued Aug. 8, 2006.
Japanese Office Action dated Jan. 30, 2007 and translation.

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