Electronic Design

The Elusive Blue LED: How Did Researchers Finally Triumph?

It’s hard to believe that the first blue LED didn’t arrive until 1993. They look simple, but looks are deceiving (Fig. 1). 1. Image showing a blue InGaN-based LED with gold wire contacts (0.4 × 0.4 mm ...

A mechanical blue LED: Stretching GaN shifts light from UV to blue without changing chemistry

A research team from the Faculty of Engineering at the University of Hong Kong (HKU) has successfully used mechanical stretching technology to dynamically control the emission color of gallium nitride ...

I'm a beauty editor, and this is the only LED face mask I still use a year later

I've tested dozens of LED light therapy masks over the years—and Shark's CryoGlow cooling, de-puffing LED face mask is my ...