| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED drive circuit capable of achieving mild lighting when turning on a power switch even after connection with a dimmer circuit (a dimmer) including a triac because operation of the dimmer circuit becomes unstable immediately after turning on the power switch and hence an LED lighting device is sometimes illuminated with unexpected brightness.SOLUTION: The LED drive circuit 10 includes an LED array formed by connecting a diode bridge rectifier circuit 11, a delay circuit 12 and a plurality of LED 141 in series to each other. In the delay circuit 13, an electric current output from the diode bridge rectifier circuit 11 runs through the LED array 14 after the circuit reaches a desired state, thus forming a current path returning to the diode bridge rectifier circuit 11.SELECTED DRAWING: Figure 1 |
