Without blue LEDs, televisions, computers, and phones wouldn’t have backlit liquid-crystal display (LCD) screens, which are built with LEDs, according to the assembly. LEDs also provide the flash for camera phones.
Providing Light to Those Without Electricity
LEDs are far more efficient than traditional light sources. In other words, they require less energy to provide light. In the developing world, where more than a billion people live without access to electricity grids, the efficiency of the LED means they can use cheap local solar power instead, according to the assembly.
Read more: http://www.newsweek.com/how-blue-led-changed-world-and-won-nobel-prize-275977