LED lighting device and LED illuminating device
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United States of America Patent
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Jan 16, 2018
Issued Date -
N/A
app pub date -
Feb 19, 2016
filing date -
Mar 31, 2015
priority date (Note) -
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Abstract
An LED lighting device 2 according to this embodiment includes a lighting circuit that supplies a current to an LED, and a dimmer 7 that generates a PWM signal for controlling the supply of the current to the LED from the lighting circuit, in which the dimmer 7 feedback-controls the PWM signal that controls the supply of the current to the LED by comparing the output current to be output to the LED with a target current and feedforward-controls the PWM signal according to a fluctuation of an input voltage from a commercial power supply 1.
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