| 摘要 |
PROBLEM TO BE SOLVED: To provide a drive circuit for LED lighting applications, which generates the minimum total harmonic distortion.SOLUTION: A circuit includes: first serial interconnection of a first LED group, a first transistor 113 and a first resistor 117; and second serial interconnection of a second LED group, a second transistor 115 and a second resistor 119. First and second LED groups are selectively driven by rectification voltage applied between both ends of the first serial interconnection.SELECTED DRAWING: Figure 1-1 |
