Abstract
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 induced color shifts and the decrease of the luminous flux are investigated.
Original language | English |
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Title of host publication | Proceedings of the IEEE Energy Conversion Congress and Exposition, ECCE 2010 |
Number of pages | 5 |
Publisher | IEEE Press |
Publication date | Sept 2010 |
Pages | 731-735 |
ISBN (Print) | 978-1-4244-5286-6 |
DOIs | |
Publication status | Published - Sept 2010 |
Event | IEEE Energy Conversion Congress and Exposition, ECCE 2010 - Atlanta, United States Duration: 12 Sept 2010 → 16 Sept 2010 |
Conference
Conference | IEEE Energy Conversion Congress and Exposition, ECCE 2010 |
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Country/Territory | United States |
City | Atlanta |
Period | 12/09/2010 → 16/09/2010 |
Keywords
- Light-emitting diodes
- Amplitude modulation
- Pulse width modulation