ＬＥＤ駆動方法及びＬＥＤ駆動回路

Japanese Patent JP6841623

B2

PROBLEM TO BE SOLVED: To provide an LED drive method and an LED drive circuit, capable of efficiently using a voltage region unused for preparing the voltage variation of AC input.SOLUTION: The method for driving LEDs of an LED row in an LED drive circuit including an LED row using a power supply end into which a pulsating current obtained by full wave rectification is input as one end, and having N LEDs (N≥3) connected in series; and a conduction switching part for switching the conduction of LEDs between the power supply end and the j-th stage (2≤j