Using photonic lattice technology it is possible to build large-area chips that enable ultra-high power sources for projection and other applications, writes Robert Karlicek of Luminus Devices. The term "power LED" usually describes one of two types of LED assemblies: a Conventional 1 mm 2 power chip in a power package, or an array of chips (1 mm 2 or smaller) combined in one of several different types of power packaging formats (semiconductor chip(s), package, encapsulant and heat sink).
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While the performance of power LED devices has improved dramatic over the past 10 years, the basic concepts haven't changed too much over the past forty years: one or more small LED semiconductor chips attached to a metal packaging structure and covered by an encapsulant/ Lens to help extract and shape the light output.
Conventional power LEDs have gradually evolved through incremental improvements in semiconductor and packaging materials and manufacturing processes.
Here we describe a new generation of ultra-high-power photonic lattice LEDs, which operate at input powers as high as 100 W and are orders of magnitude brighter than conventional power LEDs. These are the first commercially available LEDs using photonic crystal concepts to manage Light extraction from the LED.
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This article was published in the August 2007 issue of LEDs Magazine.
To read the full version of this article, please visit our Magazine page, where you can download FREE electronic PDF versions of all issues of LEDs Magazine.
You can also request a print copy of LEDs Magazine (available by paid subscription) and sign up for our free weekly email newsletter . About the Author Robert Karlicek is chief scientist of Luminus Devices, Inc., which develops and manufactures high performance solid-state Light sources customized for a variety of applications, including high definition TVs, video projectors, avionics displays, and lighting systems. As a world-renowned authority in LED technology, Karlicek has authored more than 40 publications and 23 patents and is frequently an invited speaker At industry conferences, including Strategies in Light. Email: , website: and .![]()
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Conventional power LEDs have gradually evolved through incremental improvements in semiconductor and packaging materials and manufacturing processes.
Here we describe a new generation of ultra-high-power photonic lattice LEDs, which operate at input powers as high as 100 W and are orders of magnitude brighter than conventional power LEDs. These are the first commercially available LEDs using photonic crystal concepts to manage Light extraction from the LED.
+++++++
This article was published in the August 2007 issue of LEDs Magazine.
To read the full version of this article, please visit our Magazine page, where you can download FREE electronic PDF versions of all issues of LEDs Magazine.
You can also request a print copy of LEDs Magazine (available by paid subscription) and sign up for our free weekly email newsletter . About the Author Robert Karlicek is chief scientist of Luminus Devices, Inc., which develops and manufactures high performance solid-state Light sources customized for a variety of applications, including high definition TVs, video projectors, avionics displays, and lighting systems. As a world-renowned authority in LED technology, Karlicek has authored more than 40 publications and 23 patents and is frequently an invited speaker At industry conferences, including Strategies in Light. Email: , website: and .
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