30 Aug '13, 6pm

Proved: Why LED efficiency drops at high current

Proved: Why LED efficiency drops at high current

Proved: Why LED efficiency drops at high current no comment steve bush 2013/08/30 Researchers at the US Rensselaer Polytechnic have proven a link between LED efficiency drop at high current and carrier mobility. Better lighting LEDs could result. “Efficiency droop, first reported in 1999, has been a key obstacle in the development of LED lighting for situations, like household lighting, that call for economical sources of versatile and bright light,” said the university. Published in Applied Physics Letters, the work shows that at high current an electric field develops within the p-type region of the diode allowing electrons to escape the active region where they would otherwise re-combine with holes to emit photons – a mechanism previously proposed, but not proven, said Rensselaer. “We measure excellent correlation between the onset of field build-up and the onset of dro...

Full article: http://www.electronicsweekly.com/news/components/led-ligh...

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Full LED headlight replaces halogen originals

Full LED headlight replaces halogen originals

electronicsweekly.com 27 Aug '13, 3pm

Full LED headlight replaces halogen originals no comment steve bush 2013/08/27 US automotive firm Peterson Manufacturing e...

Power Integrations - New reference design for efficient PAR38 LED spotlight

Power Integrations - New reference design for e...

electropages.com 31 Aug '13, 10am

Commenting, Andrew Smith, product marketing manager, Power Integrations, said: “The combination of the high lumen output, ...

Firewalker LED Sneakers: via @YouTube

youtube.com 28 Aug '13, 6pm

Close Your browser is not supported by YouTube and it needs to be updated. Learn more . Firewalker LED Sneakers Adafruit I...

LED Lighting: Blue + Yellow = White

LED Lighting: Blue + Yellow = White

spectrum.ieee.org 24 Aug '13, 2pm

This is part of IEEE Spectrum's special report: Top 11 Technologies of the Decade Back in the 20th century, just about the...

As Millenials grow up do they demand cooler LED sneakers?

As Millenials grow up do they demand cooler LED...

hackaday.com 29 Aug '13, 6pm

We’re hoping that whomever came up with the idea of integrating LEDs into children’s shoes is kicking back on a beach some...

Choosing the right dimmable LED driver

Choosing the right dimmable LED driver

electronicsweekly.com 20 Aug '13, 8am

Choosing the right dimmable LED driver no comment richard wilson 2013/08/20 LED driver designs can deliver flicker-free an...

@BerkeleyLab researchers r improving the energy...

eetd.lbl.gov 03 Sep '13, 6pm

The Power Usage Effectiveness (PUE) metric has been used for years to determine how much of the power in a data center is ...

LED Sneakers Brighten up Your Step

LED Sneakers Brighten up Your Step

makezine.com 02 Sep '13, 1pm

Pieces of velostat are sewn into the heel of each sneaker and detect the resistive difference upon each footfall. This is ...