The behind-the-scenes tales of hit products and creations from Japan: this is Japan's Top Inventions. This time, blue LEDs, or light-emitting diodes. The world's first blue LEDs were created in 1989 by a research team at Nagoya University. These LEDs, now used in lightbulbs, smartphone screens, automobile headlights, and more sparked a lighting revolution. Discover the little-known story behind this Nobel Prize-winning invention.