Apparatus and method for driving light emitting diode

PURPOSE: A driving device and driving method of an LED device are provided to reduce electrical energy consumption and the generation of heat by grasping a disconnected LED channel before output voltage is arrived to LED operating voltage. CONSTITUTION: An electric power converting unit(30) connects an output terminal to a first terminal of a plurality of LED channels. The electric power converting unit changes output voltage into output voltage and outputs it to the output terminal. A plurality of current controllers(20) is connected to a second terminal of the plurality of LED channels, respectively. The plurality of current controllers controls current of the plurality of LED channels. A detection controller(40) determines detection time capable of detection of a disconnection state of the plurality of LED channels. [Reference numerals] (20) LED current controller CT; (30) Electric power converting unit; (40) LED state detection controller; (50) LED state detection unit; (60) Electric power converting controller