| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED module in which the management load of a current detection resistor is small, even if light-emitting circuit blocks, each including an LED array and a resistor for current detection, are connected in multi-stage when driving an LED element in full-wave rectification waveform.SOLUTION: When an LED array 111, and the like, consisting of a series connection of LED elements 112, and the like, and five light-emitting circuit blocks 110, and the like, including a bypass circuit 113, and the like, or a constant current circuit 153, are connected like a ladder, the current detection values included in the light-emitting circuit blocks 130, 120, 110 are set to 2R, 3R, 4R, where R is the reference value of a current detection resistor 146 included in a light-emitting circuit block 140. |
