Power circuit and illumination apparatus

Details Power circuit and illumination apparatus Power circuit and illumination apparatus

2011-08-23

2011-08-23

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Discharge control discharge device load

C315S312000, C315S18500S, C315S291000, C315S247000

Reexamination Certificate

active

08004204

ABSTRACT:
A series load circuit is a circuit formed by connecting a light-emitting device unit851(the first load circuit) and a light-emitting device unit852(the second load circuit) in series. A voltage generating circuit111generates voltage to be applied to the series load circuit. A current detecting circuit112detects electric current flowing through the light-emitting device unit851. A controlling circuit114controls the voltage generating circuit111so that the electric current detected by the current detecting circuit112becomes a predetermined current value.

REFERENCES:
patent: 2002/0181259 (2002-12-01), Duerbaum et al.
patent: 2002/0186026 (2002-12-01), Elferich
patent: 2003/0067791 (2003-04-01), Elferich et al.
patent: 2004/0170030 (2004-09-01), Duerbaum et al.
patent: 11-341795 (1999-12-01), None
patent: 2002-244103 (2002-08-01), None
patent: 2002-244103 (2002-08-01), None
patent: 2002-374674 (2002-12-01), None
patent: 2003-111408 (2003-04-01), None
patent: 2004-111104 (2004-04-01), None

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