LED LIGHT SOURCE LIGHTING DEVICE, AND LED ILLUMINATION FIXTURE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To reduce optical flickering of an LED light source immediately after lighting in an LED light source lighting device which makes brightness of the LED light source constant by feedback control based on a detection signal from a brightness sensor.

SOLUTION: The LED light source lighting device 1 includes: an LED power supply part 3 which supplies power to an LED part 10 consisting of an LED module; the brightness sensor 6 which detects emission intensity of the LED part 10; and a control part 5 which performs the feedback control of the detection signal by the brightness sensor 6 to control the power to be output from the LED power supply part 3 so as to keep the emission intensity of the LED part 10 constant. The control part 5 controls the power to be output from the LED power supply part 3 so as to keep the emission intensity of the LED part 10 constant based on the detection signal fed back from the brightness sensor 6 after predetermined time t1 passes since immediately after the lighting. Thus, the optical flickering immediately after lighting of the LED part 10 is reduced.

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