| 摘要 |
PROBLEM TO BE SOLVED: To uniform heat distribution, and to streamline a circuit.SOLUTION: An LED lighting device provided with an automatic flicker circuit comprises: an LED aggregate 10 connected in series to an output side of a rectification circuit 2; LED driving means 3 for controlling energization to the LED aggregate 10; illuminance detection means 51 for detecting an illuminance in an ambient environment; input voltage detection means 52 for detecting a voltage value of an input voltage which has been full-wave rectified by the rectification circuit 2; and input control means 53 for limiting a current value energized to the LED driving means 3 based on the illuminance detected by the illuminance detection means 51 and the input voltage detected by the input voltage detection means 52. The input control means 53 controls the current value so that the brighter the illuminance detected by the illuminance detection means 51 becomes or the higher the input voltage detected by the input voltage detection means 52 becomes, the smaller the energization amount of the LED driving means 3 becomes. |
