专利名称：Method and circuit for controlling an LED发明人：Raymond Kohler申请号：US12246052申请日：20081006公开号：US07609008B1公开日：20091027
专利附图：
摘要：A control circuit coupled to a power line controlled by a dimmer having aswitching device includes, for example, an active power factor correction circuit receivingpower from a bridge rectifier and storage capacitor and drawing an average continuouscurrent when the switching device is “on.” An LED power driving circuit receives a
controlled current from the active power factor correction circuit and generates anoutput current received by at least one LED outputting visible light. A positive voltagefeedback circuit senses a feedback voltage across the LED, through the LED powerdriving circuit, and sends the feedback voltage to the active power factor correctioncircuit. A pump back power circuit is electrically coupled to the LED power driving circuitand applies a bias voltage to an output of the bridge rectifier to power the active powerfactor correction circuit when the switching device is “off.”
申请人：Raymond Kohler
地址：Souderton PA US
国籍：US
代理机构：Panitch Schwarze Belisario & Nadel LLP
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