Light-emitting diodes (LEDs) are so ubiquitous that it's easy to forget just how much society relies on these underappreciated technological wonders. Yet, the history of the LED goes back further than ...

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 ...

You can get a brighter smile with a number of different whitening products and techniques available at home or at a dentist’s office. They vary in effectiveness (and price), but none of them provide ...

LED light therapy is a popular noninvasive skin treatment for acne, sun damage, wounds, and other skin problems. People can choose to have LED light therapy at a dermatologist’s office or to use a ...

Most of us have seen slowly-moving dark bands or thin lines when shooting video with large LED displays in the frame. The LED screen could be the focus of the shot or just in the background, but ...