Abstract
Luminaires based on light emitting diode (LEDs) offer ease of control for light adaptation. In particular, adapting light output of the LED luminaires to daylight leads to energy-efficient lighting solutions. In a daylight-adaptive lighting system, the dimming levels are determined such that the artificial illuminance together with the daylight illuminance meets specified illuminance constraints. Closed-loop illumination control is traditionally used based on feedback obtained by measurements using light sensors, adding to cost and installation complexity. In this paper, we present a solution wherein the LED luminaire is used as a light source as well as a light sensor. We propose a protocol wherein the LEDs are driven in forward-bias by a pulse width modulation signal, thus emitting light, and in reverse-bias over a duration where they sense light. Under the proposed solution, the sensed illuminance is solely the daylight contribution. This enables use of simple open-loop illumination control schemes for daylight adaptation. We demonstrate the proof-of-principle with an LED array prototype.
Original language | English |
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Title of host publication | Proceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society |
Place of Publication | Piscataway |
Publisher | Institute of Electrical and Electronics Engineers |
Pages | 6081-6086 |
Number of pages | 6 |
ISBN (Print) | 9781479902248 |
DOIs | |
Publication status | Published - 6 Jan 2014 |
Externally published | Yes |
Event | 39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013 - Vienna, Austria Duration: 10 Nov 2013 → 14 Nov 2013 Conference number: 39 |
Conference
Conference | 39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013 |
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Abbreviated title | IECON 2013 |
Country/Territory | Austria |
City | Vienna |
Period | 10/11/13 → 14/11/13 |