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. 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. Blue LEDs, in combination with red and green LEDs (which had been discovered previously), make it possible to produce white light.
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