Method and apparatus for driving a light emitting diode

Details Method and apparatus for driving a light emitting diode Method and apparatus for driving a light emitting diode

2007-03-02

2009-11-17

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S224000, C315S276000

Reexamination Certificate

active

07619372

ABSTRACT:
An apparatus includes circuitry that responds to application to its input of an alternating current input signal by producing at its output an output signal suitable for driving an electronic light generating element. The circuitry includes a regulating section that has a magnetic switch and that causes a current flowing through the output to be maintained substantially at a selected value. A different aspect relates to a method for operating circuitry having an input, an output and a magnetic switch. The method includes causing the circuitry to respond to application to its input of an alternating current input signal by producing at its output an output signal suitable for driving an electronic light generating element, where the magnetic switch is used in regulating a current flowing through the output so as to maintain the current substantially at a selected value.

REFERENCES:
patent: 5233270 (1993-08-01), Nilssen
patent: 6013985 (2000-01-01), Green et al.
patent: 197 29 690 (1999-01-01), None
patent: WO 2006 / 038157 (2006-04-01), None
PCT Search Report (PCT/ISA/220 and 210) and Written Opinion (PCT/ISA/237) dated Jul. 22, 2008 for PCT Application No. PCT/US2008/055474, 13 pages.

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