LED drive circuit and LED illumination unit
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United States of America Patent
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-
Nov 4, 2014
Grant Date -
May 30, 2013
app pub date -
Nov 29, 2012
filing date -
Nov 30, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
There is provided an LED drive circuit that can be connected to an alternating-current power supply through a phase control dimmer and that drives an LED load, the LED drive circuit including: an LED current control circuit; a capacitance component and a resistance component that are connected in series between an input of the LED current control circuit and a reference potential; a switch element that is connected to both ends of the resistance component; and a switch control portion that turns off the switch element for a given period of time after a timing when the phase control dimmer is turned on and that turns on the switch element after the given period of time elapses.
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