Étendue-squeezing light injector

Julio C. Chaves; Simone Sorgato; Pablo Benitez; Juan C. Miñano; Waqidi Falicoff; Ruben Mohedano

doi:10.1117/12.2189302

13 October 2015 Étendue-squeezing light injector

Julio C. Chaves, Simone Sorgato, Pablo Benitez, Juan C. Miñano, Waqidi Falicoff, Ruben Mohedano

Proceedings Volume 9572, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII; 95720J (2015) https://doi.org/10.1117/12.2189302
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

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.

Citation Download Citation

Julio C. Chaves, Simone Sorgato, Pablo Benitez, Juan C. Miñano, Waqidi Falicoff, and Ruben Mohedano "Étendue-squeezing light injector", Proc. SPIE 9572, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII, 95720J (13 October 2015); https://doi.org/10.1117/12.2189302

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KEYWORDS

Light emitting diodes

Waveguides

LED backlight

Light

Light sources

Geometrical optics

Nonimaging optics

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