| 摘要 |
{Technical Problems} To provide a simple style of lighting device using LED {Means for Solving Problems} A lighting device using LED, comprising an LED group 250 configured with series-connected plural number of LED 252 and a driving circuit 550 for feeding the light-emission current to the LED group, wherein
the driving circuite 550 has a parallel circuit comprised of a peak current setting capacitor 222 and a resistor 220 connected in parallel thereto, and a full-wave rectification circuit 230; wherein
the LED group 250 is connected to the output terminal of the full-wave rectification circuit, and the capacitance of the peak current setting capacitor has a value within a region in which the peak value of the pulsating current behaves to increase its value in accordance with the increase of the capacitance of the peak current setting capacitor; wherein
an interruption period that is determined in accordance with the number of the series-connections of the LED in the LED group is specified, and the pulsating current, of which peak value is determined in accordance with the capacitance of the peak current setting capacitor, is fed to the LED group. |
