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Blue light-emitting diodes are seen at the headquarters of Toyoda Gosei Co. in Kiyosu, Aichi Prefecture, central Japan, October 9, 2014. Three Japanese scientists jointly won the 2014 Nobel Prize in Physics for inventing the blue light-emitting diode, the Royal Swedish Academy of Sciences announced on October 7, 2014. (KEYSTONE/JIJI PRESS/Toru Kawada )