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Licensed Unlicensed Requires Authentication Published by De Gruyter December 28, 2016

Enhancing the luminance of converted green LEDs in LED projectors

Benjamin Schulz

Benjamin Schulz received his MEng degree in Electrical and Microsystems Engineering from the Regensburg University of Applied Sciences after he had finished a dual study program in cooperation with OSRAM Opto Semiconductors. In 2015, he started his PhD thesis at the Light Technology Institute at the Karlsruhe Institute of Technology (KIT). Since 2012, he is employed at OSRAM Opto Semiconductors in the Visible LED Applications Engineering department and with a focus on LED-based projection systems.

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and Cornelius Neumann

Cornelius Neumann studied Physics and Philosophy at the University of Bielefeld, Germany. After his PhD, he worked for the automotive supplier Hella in the advanced development for automotive lighting. During his time at Hella, he was responsible for signal lighting, LED application, and acted as a director of the L-LAB, a laboratory for lighting and mechatronics in public private partnership with the University of Paderborn, Germany. In 2009, he became Professor for Optical Technologies in Automotive and General Lighting and one of the two directors of the Light Technology Institute at the Karlsruhe Institute of Technology, Germany.

Abstract

High-power light-emitting diodes have successfully found their way into projection applications. Owing to their long lifetime, small size, and easy electrical drive, they are getting more and more attractive for use in various kinds of projectors. The challenge to achieve higher brightness levels lies in the étendue limitation, which is determined mainly by the size of the microdisplay inside the projection system. In this paper, a new approach is presented to increase the output flux of LED-based projectors by enhancing the luminance of converted green LEDs.

About the authors

Benjamin Schulz

Benjamin Schulz received his MEng degree in Electrical and Microsystems Engineering from the Regensburg University of Applied Sciences after he had finished a dual study program in cooperation with OSRAM Opto Semiconductors. In 2015, he started his PhD thesis at the Light Technology Institute at the Karlsruhe Institute of Technology (KIT). Since 2012, he is employed at OSRAM Opto Semiconductors in the Visible LED Applications Engineering department and with a focus on LED-based projection systems.

Cornelius Neumann

Cornelius Neumann studied Physics and Philosophy at the University of Bielefeld, Germany. After his PhD, he worked for the automotive supplier Hella in the advanced development for automotive lighting. During his time at Hella, he was responsible for signal lighting, LED application, and acted as a director of the L-LAB, a laboratory for lighting and mechatronics in public private partnership with the University of Paderborn, Germany. In 2009, he became Professor for Optical Technologies in Automotive and General Lighting and one of the two directors of the Light Technology Institute at the Karlsruhe Institute of Technology, Germany.

References

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Received: 2016-10-14
Accepted: 2016-11-29
Published Online: 2016-12-28
Published in Print: 2017-2-1

©2016 THOSS Media & De Gruyter

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