Light-emitting diode driving module, method of operating thereof, and lighting apparatus including the same

A method for driving light-emitting diodes activated by a rectified voltage and controlled through driving nodes, the method comprising the steps of:

• determining whether the rectified voltage is modulated, by receiving a source voltage based on the rectified voltage;
• when the rectified voltage is not modulated, adjusting current through the driving nodes based on the source voltage;
• and
• when the rectified voltage is modulated, adjusting currents conducted to the driving nodes in response to a dimming signal that indicates a degree of modulation of the rectified voltage, without adjusting current conducted to the driving nodes based on the source voltage.

A lighting apparatus comprising:

• a light-emitting circuit to receive a rectified voltage, and including light-emitting diodes and a capacitor connected with the light-emitting diodes;
• and
• a light-emitting diode driving module connected with the light-emitting circuit through driving nodes, the light-emitting diode driving module comprising:
• an LED driver to adjust current conducted to the driving nodes depending on a voltage of a driving current setting node;
• and a driving current controller to control the voltage of the driving current setting node by outputting a driving current control signal, the driving current controller comprising:
• a control signal output circuit connected to a dimming node to receive a dimming signal when the rectified voltage is modulated, and to adjust the driving current control signal depending on the dimming signal;
• a mode detector to detect whether the rectified voltage is modulated by receiving a source voltage depending on the rectified voltage, and to enable a selection signal depending on a detection result;
• and
• a power compensator to adjust the driving current control signal depending on the source voltage when the selection signal is enabled.