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Proceedings Paper

Novel approaches for light control of high power LEDs
Author(s): Ladislav Kuna; Franz P. Wenzl; Christian Sommer; Anja Haase; Ernst Zinterl; Joachim R. Krenn; Paul Hartmann; Peter Pachler; Marko Schweighart; Stefan Tasch; Günther Leising
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Paper Abstract

Solid state lighting offers a lot of novel prospects for tomorrows customized lighting solutions. None the less, to compete with and to surpass the performance of the traditional lighting systems, design and development of LED light sources is still facing the necessity of further improvements, in particular with respect to device efficiency and light control. In this contribution we discuss recent developments and novel strategies in order to improve the light extraction efficiency as well as to affect the directionality of the light emitted from high power LEDs. In order to be up to characterize these modifications with high spatial resolution, novel characterization techniques, like the implementation of a confocal principle into the measurement set-up are discussed.

Paper Details

Date Published: 18 November 2008
PDF: 6 pages
Proc. SPIE 7138, Photonics, Devices, and Systems IV, 71382B (18 November 2008); doi: 10.1117/12.818082
Show Author Affiliations
Ladislav Kuna, Joanneum Research Forschungsges.mbH (Austria)
Franz P. Wenzl, Joanneum Research Forschungsges.mbH (Austria)
Christian Sommer, Joanneum Research Forschungsges.mbH (Austria)
Anja Haase, Joanneum Research Forschungsges.mbH (Austria)
Ernst Zinterl, Joanneum Research Forschungsges.mbH (Austria)
Joachim R. Krenn, Joanneum Research Forschungsges.mbH (Austria)
Paul Hartmann, TridonicAtco Optoelectronics GmbH (Austria)
Peter Pachler, TridonicAtco Optoelectronics GmbH (Austria)
Marko Schweighart, TridonicAtco Optoelectronics GmbH (Austria)
Stefan Tasch, TridonicAtco Optoelectronics GmbH (Austria)
Günther Leising, Graz Univ. of Technology (Austria)


Published in SPIE Proceedings Vol. 7138:
Photonics, Devices, and Systems IV
Pavel Tománek; Dagmar Senderáková; Miroslav Hrabovský, Editor(s)

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