The idea behind the PixMob wristband is simple — at a concert ... infrared projectors are used to transmit commands so they all light up in sync. Sometimes, attendees would be allowed to ...

Wristbands are surely this decade’s equivalent. With two button batteries, a mini circuit board, tiny computers, LED lights, a Lilliputian radio receiver, the outside shell and thick strap ...

LED wristbands are now a common feature of large arena concerts and events, with a variety of capabilities and technical implementations. In the video after the break, Wall Street Journal does a ...

WSJ goes behind the scenes with one LED company, PixMob, to see the tech behind the wristbands. Photo illustration: Madeline Marshall ...