29 May '13, 4pm

A Definitive Explanation for LED Droop?: Experiments point to the Auger explanation, but critics dismiss the c...

A Definitive Explanation for LED Droop?: Experiments point to the Auger explanation, but critics dismiss the c...

Photo: Ecole Polytechnique, Ph. Lavialle Catching Electrons: Researchers pinned the loss of efficiency of LEDs to electrons escaping under the influence of the Auger effect, which they caught and measured. A divisive debate concerning the origin of the biggest flaw in the LED is now over, according to researchers from the University of California, Santa Barbara, and the École Polytechnique, in France. This team claims that it has categorically identified the cause of “droop ,” a mysterious malady that leads an LED’s efficiency to decline as the current that passes through it is increased. “In the experiment we do, there is a direct measurement of high-energy electrons, and the only source of [these] electrons is the Auger effect,” explains team member Claude Weisbuch , who argues that previous work identifying Auger as the cause of droop was just circumstantial. Auger reco...

Full article: http://spectrum.ieee.org/semiconductors/optoelectronics/a...

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greenhomeguide.com 29 May '13, 7pm

Reading between the lines, it sounds like you have a Hansen-type swing arm lamp with a 3-way switch that was intended for ...

iWatt aims at low-cost dimable LED light bulbs

iWatt aims at low-cost dimable LED light bulbs

electronicsweekly.com 31 May '13, 9am

iWatt aims at low-cost dimable LED light bulbs no comment steve bush 2013/05/31 California-based iWatt has announced an ac...

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thedomains.com 29 May '13, 8pm

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