The three Japan-born physicists awarded this year's Nobel Prize in physics have been speaking in Stockholm about their work and how they succeeded in developing the blue light-emitting diode, the breakthrough that led to the white LEDs now commonly used worldwide.
They delivered lectures Monday at Stockholm University. On Wednesday they will attend the Nobel awards ceremony.
The LED's development involved "much trial and error," said Isamu Akasaki, 85, a professor at Meijo University in Nagoya. He collaborated in the work with fellow Nobel laureate Hiroshi Amano, a professor at Nagoya University.