Photonic Lattice LEDs are new class of light-emitting device

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.

Content Dam Leds En Articles Print Volume 4 Issue 8 Features Photonic Lattice Leds Are New Class Of Light Emitting Device Leftcolumn Article Thumbnailimage File
The term “power LED” usually describes one of two types of LED assemblies: a conventional 1 mm2 power chip in a power package, or an array of chips (1 mm2 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 dramatically 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.

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