Polin, Dmitrij ; Klir, Stefan ; Wagner, Max ; Khanh, Tran Quoc (2016)
Reducing the stroboscopic effects of LED luminaires with pulse width modulation control.
In: Lighting Research and Technology (LRT), 49 (3)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Pulse width modulation for dimming the light output of LEDs has become common. When pulse width modulation is used at low frequencies unwanted visual artefacts including flicker perception and stroboscopic effects may occur. These artefacts need to be avoided or at least reduced to a minimum in order to obtain high user acceptance. In this paper, an optimized phase-shifted pulse width modulation method is described, implemented and validated in a visual experiment. The method is intended to minimize the stroboscopic effect on a reference surface by first optimizing the LED units of a single LED luminaire and then co-optimizing several of these luminaires. The optimized pulse width modulation waveforms are then compared to standard pulse width modulation dimming methods. In the visual experiment, 13 subjects rated the extent of the stroboscopic effect of standard and optimized waveforms in a white painted experimental room. The results indicate that the optimized waveforms are indistinguishable from constant light.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Polin, Dmitrij ; Klir, Stefan ; Wagner, Max ; Khanh, Tran Quoc |
| Art des Eintrags: | Bibliographie |
| Titel: | Reducing the stroboscopic effects of LED luminaires with pulse width modulation control |
| Sprache: | Englisch |
| Publikationsjahr: | 2016 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Lighting Research and Technology (LRT) |
| Jahrgang/Volume einer Zeitschrift: | 49 |
| (Heft-)Nummer: | 3 |
| Kurzbeschreibung (Abstract): | Pulse width modulation for dimming the light output of LEDs has become common. When pulse width modulation is used at low frequencies unwanted visual artefacts including flicker perception and stroboscopic effects may occur. These artefacts need to be avoided or at least reduced to a minimum in order to obtain high user acceptance. In this paper, an optimized phase-shifted pulse width modulation method is described, implemented and validated in a visual experiment. The method is intended to minimize the stroboscopic effect on a reference surface by first optimizing the LED units of a single LED luminaire and then co-optimizing several of these luminaires. The optimized pulse width modulation waveforms are then compared to standard pulse width modulation dimming methods. In the visual experiment, 13 subjects rated the extent of the stroboscopic effect of standard and optimized waveforms in a white painted experimental room. The results indicate that the optimized waveforms are indistinguishable from constant light. |
| Zusätzliche Informationen: | doi 10.1177/1477153515615934 |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Elektromechanische Konstruktionen (aufgelöst 18.12.2018) 18 Fachbereich Elektrotechnik und Informationstechnik > Lichttechnik (ab Okt. 2021 umbenannt in "Adaptive Lichttechnische Systeme und Visuelle Verarbeitung") |
| Hinterlegungsdatum: | 16 Apr 2017 20:58 |
| Letzte Änderung: | 30 Okt 2023 10:18 |
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