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Proceedings Paper

Étendue-squeezing light injector
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Paper Abstract

There is currently a desire to produce thinner LED backlights and frontlights so that the devices which use these components can be as thin and lightweight as possible. This is particularly true for smartphones and tablets both of which make extensive use of such components. The push for thinner devices may lead to situations in which the backlights are thinner than the height of the LED emitting area. This paper deals with the coupling of LEDs and thin light guides, describing some possible ways to efficiently inject light from a relatively large LED into a thinner backlight. These solutions use étendue-squeezing optics, and linear edges which allow high-efficiency light injection.

Paper Details

Date Published: 13 October 2015
PDF: 8 pages
Proc. SPIE 9572, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII, 95720J (13 October 2015); doi: 10.1117/12.2189302
Show Author Affiliations
Julio C. Chaves, Light Prescriptions Innovators Europe, S. L. (Spain)
Simone Sorgato, Light Prescriptions Innovators Europe, S. L. (Spain)
Vrije Univ. Brussels (Belgium)
Pablo Benitez, Light Prescriptions Innovators, LLC (United States)
Univ. Politécnica de Madrid (Spain)
Juan C. Miñano, Light Prescriptions Innovators, LLC (United States)
Univ. Politécnica de Madrid (Spain)
Waqidi Falicoff, Light Prescriptions Innovators, LLC (United States)
Ruben Mohedano, Light Prescriptions Innovators Europe, S. L. (Spain)


Published in SPIE Proceedings Vol. 9572:
Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII
Roland Winston; Jeffrey M. Gordon, Editor(s)

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