| 摘要 |
PROBLEM TO BE SOLVED: To provide a light source control circuit and illumination device that are capable of adjusting a light flux or color temperature of light emitted by a light source, with a simple circuit configuration.SOLUTION: A light source control circuit 3 includes: a power generation unit 5 for generating DC power to be supplied to an LED 21 and an LED 22 for emitting light having a color temperature different from that of the LED 21, from a commercial AC power source; and a color control setting circuit 71 that comprises a variable resistor 711 for distributing the power generated by the power generation unit 5 to the LED 21 and LED 22 in order to control light emitted by a light source 2 including the LED 21 and LED 22, and makes the sum of the current value of first supply current I1 supplied to the LED 21 and the current value of second supply current I2 supplied to the LED 22 be constant at least in a certain color temperature range even when the color temperature of controlled light has changed.SELECTED DRAWING: Figure 1 |
