Light-emitting diodes
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TLDR
Bergh and P.J.Dean as discussed by the authors proposed a light-emitting diode (LEDD) for light-aware Diodes, which was shown to have promising performance.Abstract:
Light-Emitting Diodes. (Monographs in Electrical and Electronic Engineering.) By A. A. Bergh and P. J. Dean. Pp. viii+591. (Clarendon: Oxford; Oxford University: London, 1976.) £22.read more
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Dissertation
Prognostics and health management of light emitting diodes
TL;DR: The approaches adopted in this work are validated and can be used to assess the life of an LED lighting system after their deployment based on the power of the light output emitted, and data driven, model driven and fusion prognostics approaches are developed to monitor and identify LED failures.
Journal ArticleDOI
Enhanced Light Output in Roughened GaN-Based Light-Emitting Diodes Using Electrodeless Photoelectrochemical Etching
TL;DR: In this paper, the authors demonstrated enhanced output power from roughened GaN-based light-emitting diodes (LEDs) by using electrodeless photoelectrochemical etching with a chopped source (ELPEC-CS etching).
DissertationDOI
Remote-Laser-Lichtquelle für ein hochaufgelöstes Scheinwerfersystem
TL;DR: Gedruckt et al. as mentioned in this paper published a paper as mentioned in this paper, in which they discuss the relation between the TU Berlin and the University of Berlin, ISBN 9783-7983-3082-5 (ISSN 2196-338X)
Proceedings ArticleDOI
A single-stage high-PF driver for supplying a T8-type LED lamp
TL;DR: A novel single-stage AC-DC driver for supplying a T8-type light-emitting-diode (LED) lamp with high power-factor (PF) and cost-effectiveness, low input current total-harmonic-distortion (THD), high circuit efficiency, and zero-voltage switching (ZVS) obtained on both two power switches are proposed.
Proceedings ArticleDOI
Electrothermal feedback of a LED lighting system: Modeling and control
Vitor C. Bender,Alexandre S. Cardoso,Guilherme C. Flores,Cassiano Rech,Tiago Bandeira Marchesan +4 more
TL;DR: Electrothermal modeling and control of a light emitting diodes (LEDs) system that consists on a Buck-Boost converter operating as the current driver and LEDs distributed along to the heatsink composing the luminaire is presented.
References
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Reliability Engineering and System Safety
TL;DR: In this paper, a polynomial dimensional decomposition (PDD) method for global sensitivity analysis of stochastic systems subject to independent random input following arbitrary probability distributions is presented.
Journal ArticleDOI
Origin of efficiency droop in GaN-based light-emitting diodes
Min-Ho Kim,Martin F. Schubert,Qi Dai,Jong Kyu Kim,E. Fred Schubert,Joachim Piprek,Yongjo Park +6 more
TL;DR: In this paper, the efficiency droop in GaInN∕GaN multiple-quantum well (MQW) light-emitting diodes was investigated and it was shown that the droop is not related to MQW efficiency but rather to the recombination of carriers outside the MqW region.
Journal ArticleDOI
Lasing in direct-bandgap GeSn alloy grown on Si
Stephan Wirths,R. Geiger,R. Geiger,N. von den Driesch,Gregor Mussler,Toma Stoica,Siegfried Mantl,Zoran Ikonic,Martina Luysberg,Stefano Chiussi,J. M. Hartmann,Hans Sigg,Jérôme Faist,Dan Buca,Detlev Grützmacher +14 more
TL;DR: In this paper, a direct bandgap GeSn alloy, grown directly onto Si(001), was used for experimentally demonstrating lasing threshold and linewidth narrowing at low temperatures.
Journal ArticleDOI
Spectroscopic and Device Aspects of Nanocrystal Quantum Dots
Jeffrey M. Pietryga,Young-Shin Park,Young-Shin Park,Jaehoon Lim,Andrew F. Fidler,Wan Ki Bae,Sergio Brovelli,Victor I. Klimov +7 more
TL;DR: Recent advances in nanocrystal research related to applications of QD materials in lasing, light-emitting diodes (LEDs), and solar energy conversion are examined.
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LED Based Indoor Visible Light Communications: State of the Art
TL;DR: This paper provides a comprehensive survey on VLC with an emphasis on challenges faced in indoor applications over the period 1979-2014.