Patent ID: 9137872
Filing Date: 2015-09-15
Classification: H05B

Abstract:
1. An LED lighting device comprising: a power converter to convert a voltage supplied from a power source to a voltage for lighting an LED; a current detector to detect an output current supplied from the power converter to the LED; a voltage detector to detect an output voltage applied from the power converter to the LED; and a controller to cause the power converter to repeat a temporary stop and a temporary operation alternately when the output current detected by the current detector is decreased and/or when the output voltage detected by the voltage detector is increased during a normal operation of the power converter, to check the detected current and/or the detected voltage each time the temporary operation is performed, to cause the power converter to normally operate if the decreased output current and/or the increased output voltage is no longer detected before a predetermined number of times of the repetition or a predetermined period of time is reached, and to cause the power converter to stop continuously if the decreased output current and/or the increased output voltage is detected when the predetermined number of times of the repetition or the predetermined period of time is reached.