Illumination and light sensing for daylight adaptation with an LED array: Proof-of-principle

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5 Citations (Scopus)

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 languageEnglish
Title of host publicationProceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages6081-6086
Number of pages6
ISBN (Print)9781479902248
DOIs
Publication statusPublished - 1 Dec 2013
Externally publishedYes
Event39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013 - Vienna, Austria
Duration: 10 Nov 201314 Nov 2013
Conference number: 39

Conference

Conference39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013
Abbreviated titleIECON 2013
CountryAustria
CityVienna
Period10/11/1314/11/13

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