Junction temperature measurement of a LED street light using forward voltage method

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

Operating junction temperature of LEDs is linked directly to lifetime, long term reliability and failure modes of LED luminaires. It is important to measure the operating junction temperature to assess the health of a LED luminaire/solid state lighting product. Measuring the junction temperature of LEDs is a difficult task as in modern LED luminaires the tiny LEDs are surrounded by optical system (lens, diffusers and reflectors) and thermal management systems (heat sink). It is difficult to measure operating junction temperature using thermocouples and IR imaging as these methods will result in erroneous estimates of junction temperature. This paper discusses the prospect of junction temperature measurement of LEDs in a LED street light by using dependency of forward voltage drop across the LED junction on the temperature of that junction. Results of operating junction temperature measurements of a LED street light indicate that inherent forward voltage dependency on junction temperature of LEDs can be applied to measure junction temperature of LEDs in a LED based luminaire. The proposed methodology can be implemented to measure operating junction temperature of LEDs in other LED lighting products.

Original languageEnglish
Title of host publication2014 International Conference on Advances in Electronics, Computers and Communications, ICAECC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479954964
DOIs
Publication statusPublished - 06-01-2015
Event2014 International Conference on Advances in Electronics, Computers and Communications, ICAECC 2014 - Bangalore, India
Duration: 10-10-201411-10-2014

Conference

Conference2014 International Conference on Advances in Electronics, Computers and Communications, ICAECC 2014
CountryIndia
CityBangalore
Period10-10-1411-10-14

Fingerprint

Temperature measurement
Light emitting diodes
Electric potential
Temperature
Lighting fixtures
Lighting
Infrared imaging
Heat sinks
Thermocouples
Optical systems
Failure modes
Lenses
Health

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Computational Theory and Mathematics

Cite this

Shailesh, K. R., Kurian, C. P., & Kini, S. G. (2015). Junction temperature measurement of a LED street light using forward voltage method. In 2014 International Conference on Advances in Electronics, Computers and Communications, ICAECC 2014 [7002455] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICAECC.2014.7002455
Shailesh, K. R. ; Kurian, Ciji Pearl ; Kini, Savitha G. / Junction temperature measurement of a LED street light using forward voltage method. 2014 International Conference on Advances in Electronics, Computers and Communications, ICAECC 2014. Institute of Electrical and Electronics Engineers Inc., 2015.
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Shailesh, KR, Kurian, CP & Kini, SG 2015, Junction temperature measurement of a LED street light using forward voltage method. in 2014 International Conference on Advances in Electronics, Computers and Communications, ICAECC 2014., 7002455, Institute of Electrical and Electronics Engineers Inc., 2014 International Conference on Advances in Electronics, Computers and Communications, ICAECC 2014, Bangalore, India, 10-10-14. https://doi.org/10.1109/ICAECC.2014.7002455

Junction temperature measurement of a LED street light using forward voltage method. / Shailesh, K. R.; Kurian, Ciji Pearl; Kini, Savitha G.

2014 International Conference on Advances in Electronics, Computers and Communications, ICAECC 2014. Institute of Electrical and Electronics Engineers Inc., 2015. 7002455.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - Operating junction temperature of LEDs is linked directly to lifetime, long term reliability and failure modes of LED luminaires. It is important to measure the operating junction temperature to assess the health of a LED luminaire/solid state lighting product. Measuring the junction temperature of LEDs is a difficult task as in modern LED luminaires the tiny LEDs are surrounded by optical system (lens, diffusers and reflectors) and thermal management systems (heat sink). It is difficult to measure operating junction temperature using thermocouples and IR imaging as these methods will result in erroneous estimates of junction temperature. This paper discusses the prospect of junction temperature measurement of LEDs in a LED street light by using dependency of forward voltage drop across the LED junction on the temperature of that junction. Results of operating junction temperature measurements of a LED street light indicate that inherent forward voltage dependency on junction temperature of LEDs can be applied to measure junction temperature of LEDs in a LED based luminaire. The proposed methodology can be implemented to measure operating junction temperature of LEDs in other LED lighting products.

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Shailesh KR, Kurian CP, Kini SG. Junction temperature measurement of a LED street light using forward voltage method. In 2014 International Conference on Advances in Electronics, Computers and Communications, ICAECC 2014. Institute of Electrical and Electronics Engineers Inc. 2015. 7002455 https://doi.org/10.1109/ICAECC.2014.7002455