Abstract

Light emitting diodes (LEDs) offer durability, long life, and high efficiency that make them an excellent alternative for illumination applications. The efficiency of conventional drivers suffers from losses due to the current sensing method that they employ. In this paper, the LED array itself is used as an optical sensor by periodically measuring neighboring cells' light intensity, instead of employing the commonly used series current-sense resistor. The results of this approach show that it provides accurate compensation of the LED characteristics, with less than one lumen variation in illumination, stability in color (color shift over time as low as ΔE = 0.76), and efficiency of up to 98.66%. The proposed sensor compensates for actual optical performance of the LED array and reduces aging effects compared to the approaches based in current measurement and control. The optical current-sensing method is a closed-loop feedback alternative, which improves the power efficiency of the LED driver by 3%. It maintains constant output illumination of the LED over time, and it utilizes a reduced number of components, thus extending the effective lifetime of LED-based devices.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Volume9190
ISBN (Print)9781628412178
DOIs
StatePublished - 2014
Event13th International Conference on Solid State Lighting - San Diego, United States
Duration: Aug 20 2014Aug 21 2014

Other

Other13th International Conference on Solid State Lighting
CountryUnited States
CitySan Diego
Period8/20/148/21/14

Fingerprint

Optical Feedback
Optical feedback
Diode
Light emitting diodes
High Efficiency
Driver
light emitting diodes
Illumination
Lighting
illumination
Sensing
Color
color
lumens
Optical Sensor
Durability
Alternatives
Optical sensors
Light Intensity
Electric current control

Keywords

  • Light emitting diode (LED)
  • Photo-detectors
  • Pulse width modulation (PWM)

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Marti-Arbona, E., Copani, T., Bakkaloglu, B., & Kiaei, S. (2014). A high efficiency LED driver based on optical feedback. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 9190). [919005] SPIE. https://doi.org/10.1117/12.2057863

A high efficiency LED driver based on optical feedback. / Marti-Arbona, Edgar; Copani, Tino; Bakkaloglu, Bertan; Kiaei, Sayfe.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9190 SPIE, 2014. 919005.

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

Marti-Arbona, E, Copani, T, Bakkaloglu, B & Kiaei, S 2014, A high efficiency LED driver based on optical feedback. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 9190, 919005, SPIE, 13th International Conference on Solid State Lighting, San Diego, United States, 8/20/14. https://doi.org/10.1117/12.2057863
Marti-Arbona E, Copani T, Bakkaloglu B, Kiaei S. A high efficiency LED driver based on optical feedback. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9190. SPIE. 2014. 919005 https://doi.org/10.1117/12.2057863
Marti-Arbona, Edgar ; Copani, Tino ; Bakkaloglu, Bertan ; Kiaei, Sayfe. / A high efficiency LED driver based on optical feedback. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9190 SPIE, 2014.
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