| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED lighting fixture that has a simple circuit configuration and a high power factor and also is capable of reducing the cost and suppress occurrence of flicker.SOLUTION: A power storage and supply circuit 10 is provided on the output side of a diode bridge DB for executing full-wave rectification on a commercial power supply. The power storage and supply circuit 10 includes a first diode D1, a second diode D2, a third diode D3, a first capacitor C1, and a second diode D2. At the top of the full-wave-rectified waveform, the first capacitor C1 and the second capacitor C2 are charged. Both the capacitors C1 and C2 are discharged at the time point when an input voltage becomes equal to the voltage values charged in the first and second capacitors C1 and C2. The number of light emitting diodes of the LED circuit 20 is set so that the voltage value at the valley of the waveform rises and the voltage is lower than the risen voltage value.SELECTED DRAWING: Figure 6 |
