Making light work of LED droop

 作者:公孙瑕剩     |      日期:2017-05-05 04:01:00
By Andy Extance THE drive to bring eco-friendly LED lighting into our homes has hit an embarrassing problem known as “droop”, the dive in efficiency when the lamps operate at the high power necessary for indoor lighting. “Efficiency droop is one of the main obstacles to achieving cost-effective and high-efficiency LEDs,” says Seong-Ju Park at the Gwangju Institute of Science and Technology (GIST) in South Korea. “Droop is one of the main obstacles to cost-effective and high-efficiency LEDs” The cause of LED droop isn’t clear but its effects are profound: while some prototypes can emit about 250 lumens per watt,