Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1998-08-24
2000-05-02
Philogene, Haissa
Electric lamp and discharge devices: systems
Current and/or voltage regulation
315307, 315209R, 323211, G05F 100
Patent
active
060576510
ABSTRACT:
A lighting apparatus includes a full-wave rectifier circuit for rectifying an AC voltage from a commercial power source, a smoothing condenser connected is series with an inductor and a diode between output terminals of the full-wave rectifier circuit, a light source unit containing a series circuit of light emitting diodes and connected in parallel with the smoothing condenser, a MOSFET connected in series with the inductor between the output terminals of the full-wave rectifier circuit, and a control circuit for performing switching control of the MOSFET. In particular, the control circuit is constituted such that a voltage across the smoothing condenser is set higher than a peak of an input voltage input to the smoothing condenser through the diode and equal to a total sum of forward voltage drops of the light emitting diodes at a time of igniting the light source, under the switching control.
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patent: 5394064 (1995-02-01), Ranganath et al.
patent: 5479336 (1995-12-01), Motoki et al.
patent: 5532918 (1996-07-01), Mayrand et al.
patent: 5612609 (1997-03-01), Choi
patent: 5644214 (1997-07-01), Lee
patent: 5661645 (1997-08-01), Hochstein
patent: 5872430 (1999-02-01), Konopka
Kabushiki Kaisha TEC
Philogene Haissa
Vo Tuyet Thi
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