Mar
12
A Lot of Good LED and Solar Cell News
March 12, 2014 | Leave a Comment
Three research papers with LED and/or for solar cell progress all published in the past few days. The three are based on one material. MIT, TU Vienna, and University of Washington (UW) researchers have all made recent advances on PV cells, LEDs, and other optoelectronic components made possible using an ultrathin tungsten diselenide film. There […]
Sep
12
LEDs Get Much More Efficient and More Useful
September 12, 2013 | 1 Comment
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 […]
Aug
2
Solving the Last Big LED Problem
August 2, 2013 | 1 Comment
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 […]
Apr
24
A Big Improvement For LEDs Coming
April 24, 2013 | 1 Comment
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 […]
Sep
6
The Lowest Cost Light Bulb
September 6, 2012 | 5 Comments
Overall cost for a light bulb is a consumer’s goal for environmentalists to hard-nosed green eyeshade number crunchers. Today’s light-emitting diode light bulbs have a slight environmental edge over compact fluorescent lamps and that edge means money to you and me. The U.S. Department of Energy’s Pacific Northwest National Laboratory (PNNL) and UK-based N14 Energy […]
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