why blue leds won a nobel price (you wouldn't watch this screen without it)

"This year's Nobel Prize in physics was awarded to three Japanese scientists for the invention of blue light-emitting diodes (LEDs), a technology that has touched society in innumerable ways and enabled technologies that Americans take for granted every day.

"Blue LEDs made possible the white-light LEDs you can buy in a hardware store and put in your house," said H. Frederick Dylla, executive director and CEO of the American Institute of Physics in College Park, Maryland. "You probably have [these LEDs] in your Blu-ray player or the display for your TV or computer screen."

Without blue LEDs, the world wouldn't have backlit smartphones, TV and computer LCD screens, Blu-ray players, many forms of lighting and countless other technological marvels.
http://www.livescience.com/48193-how-blue-leds-changed-the-world.html?cmpid=558421

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