Texas Instruments (TI) has announced the TPS92410 linear LED driver IC that can supply constant current to high-voltage LED strings. The new IC can be used along with AC/DC or DC/DC converters in conventional LED driver designs, or with a simple rectifier and TI's TPS92411 floating switch IC in AC-LED or direct-AC designs.
The US Department of Energy (DOE) has published an update on what was one of the first prominent outdoor LED lighting projects installed as part of the agency's Gateway Demonstration program back in 2008. The I-35W freeway bridge in Minneapolis, MN was lit with LED-based fixtures and is among the longest continually-operated solid-state lighting (SSL) installations in the world. After more than 20,000 hours of operation, the luminaires performed to expectations while high-pressure sodium (HPS) fixtures would have required at least one relamping cycle and most likely additional maintenance procedures.
The Royal Swedish Academy of Sciences has awarded the 2014 Nobel Prize for Physics to the team of researchers that created the first blue LEDs in the early 1990s and ultimately enabled functional white light output from LED sources. Isamu Akasaki (Meijo University, Nagoya, Japan and Nagoya University, Japan), Hiroshi Amano (Nagoya University, Japan), and Shuji Nakamura (University of California, Santa Barbara, CA) have been honored "for the invention of efficient blue light-emitting diodes which has enabled bright and energy-saving white light sources."