LIGHT EMITTING DIODE DRIVING APPARATUS

摘要

PURPOSE: A light emitting diode (LED) driving device is provided to set different duties according to LED channels, thereby reducing heat generation. CONSTITUTION: An alternating current (AC)/direct current (DC) converting unit converts input AC power into DC drive power. A detecting unit (120) detects a voltage drop generated in each channel. A converting unit (130) converts an analog value into a digital value. A driving unit (140) differently sets the duty of a switching signal. The driving unit drives the channel of plural LEDs. [Reference numerals] (110) AC/DC converting unit; (121) First detector; (12N) N^th detector; (131) First converter; (13N) N^th converter; (14) First operator; (14N) N^th operator; (150) Compensation unit