Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2009-07-22
2011-11-08
Le, Don (Department: 2819)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S2090SC, C315S284000
Reexamination Certificate
active
08054008
ABSTRACT:
The present invention includes a first DC converter converting AC voltage, into DC voltage while correcting a power factor, and a second DC converter electrically isolating the first DC converter from an LED group load, and converting the DC voltage, into a predetermined DC voltage and supply the resultant voltage to the LED group load. The second DC converter includes a current detection circuit disposed on the secondary side, and detecting current flowing into the LED group load, an error amplifier amplifying an error between a detected current value detected and a reference current value, a signal transmission isolation element transmitting a control signal based on an output signal from the error amplifier, to the primary side, and a switching element transferring power to the secondary side through the transformer by being turned on/off according to the control signal.
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U.S. Appl. No. 12/507,313, filed Jul. 22, 2009, Kimura.
Le Don
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Sanken Electric Co. Ltd.
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