Dr. Lai Yuk Ming, Dr. Loo Ka Hong and Prof. Michael Tse at the Hong Kong Polytechnic University Department of Electronic and Information Engineering have developed a high performance LED driver. The new driver powers LED lights with an innovative approach called “multi-level” PWM (Pulse-Width Modulation), which delivers remarkable improvements in terms of light quality [...]

Rensselaer Polytechnic Institute researchers have identified the mechanism behind a plague of LED light bulbs.  The problem is called “efficiency droop” that causes LEDs to lose up to 20 percent of their efficiency as they are subjected to greater electrical currents. Efficiency droop, first reported in 1999, has been a key obstacle in the development [...]

Researchers from Ulsan National Institute of Science and Technology (UNIST) of South Korea have developed a new plasmonic material that can be applied to both polymer light-emitting diodes and polymer solar cells.  The new material and build process offers world-record high performance, through a simple and cheap process. Most semiconducting optoelectronic devices (OEDs), including photodiodes, [...]

LEDs have a mysterious drop in the light produced called “droop” when a higher current is applied.  That limits the amount of lumens an LED can make thus holding the technology down as a viable replacement for incandescent bulbs for all-purpose commercial and residential lighting. The situation could change now that the cause of LED [...]

Just when we’re all psyching up for a big race to mass-produced and falling LED prices the news has a big improvement in store.  Researchers from Belgium, France, and Canada inspired by the nighttime twinkling of fireflies have been inspired to modify the light-emitting diode (LED).   The firefly design is more than one and a [...]

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