Japanese physicist Isamu Akasaki, a co-winner of the 2014 Nobel Prize in physics for inventing the world's first efficient blue light-emitting diodes, has died, Meijo University said Friday. He was 92.Akasaki, a professor at the university, had been recognized for the invention which has contributed to bright and energy-saving white light sources, widely known as LED lamps.He died of a pneumonia Thursday morning at a hospital in the central Japan city of Nagoya, the university said.Akasaki, born in Kagoshima Prefecture in Japan's southwest, graduated from Kyoto University in 1952 before wor…READ FULL ARTICLE