Control circuit and method for generating voltage for light emitting diode lighting device
AssigneeSilicon Works Co., Ltd.
InventorYong Geun KIM
Life of this patent
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Abstract
Disclosed are a control circuit and a voltage generation method of an LED lighting apparatus which provides lighting using a rectified voltage. Light emission of the LED lighting apparatus can be implemented through current regulation, a rectified voltage used for light emission can be used to provide a constant voltage required for a peripheral circuit, and a current flowing through a current path formed by the current regulation can be controlled to perform dimming.
Claims15
A control circuit of an LED lighting apparatus, which controls light emissions of a plurality of LED groups driven by a rectified voltage, comprising:
- a transmission circuit configured to transmit a voltage lowered from the rectified voltage by one or more LEDs included in the LED groups;
- and
- a voltage regulation circuit configured to regulate the lowered voltage and output the regulated voltage.
A control circuit of an LED lighting apparatus which includes a plurality of LED groups receiving a rectified voltage, comprising:
- a current control circuit configured to provide a current path corresponding to sequential light emissions of the LED groups;
- a voltage regulation circuit configured to receive a voltage lowered from the rectified voltage by one or more LEDs included in the LED groups, store the received voltage, regulate the stored voltage, and output the regulated voltage as a constant voltage;
- and
- a dimming control circuit configured to operate using the constant voltage provided from the voltage regulation circuit, and control a current flow on the current path in response to one or more of an internal sensing signal and an external control signal.
A voltage generation method of an LED lighting apparatus, which controls light emissions of a plurality of LED groups driven by a rectified voltage, comprising:
- primarily lowering the rectified voltage through one or more LEDs included in the LED groups;
- secondarily lowering the primarily lowered voltage, and outputting a DC voltage;
- and
- providing the DC voltage to a peripheral circuit.
Dependencies are inferred from the claim text.