Led spectral and power characteristics under hybrid PWM/AM dimming strategy

  title={Led spectral and power characteristics under hybrid PWM/AM dimming strategy},
  author={Szymon Michal Beczkowski and Stig Munk-Nielsen},
  journal={2010 IEEE Energy Conversion Congress and Exposition},
In order to dim LEDs the pulse width modulation (PWM) or amplitude modulation (AM) dimming scheme is typically used. Previous studies show that these dimming schemes can have opposite effects on diodes peak wavelength shift. An experimental study was conducted to test the behavior of InGaN diodes and phosphor-converted white diodes under hybrid PWM/AM modulation. Feed forward control schemes that provide stable peak wavelength position during dimming and the ability to compensate the thermally… CONTINUE READING
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