Skip to playerSkip to main content
Atlant Media
  • 2 days ago

Category

📚
Learning
Transcript
00:00The Nobel Prize in Physics 2014 was awarded jointly to Isamu Akasaki, Hiroshi Amano and
00:23Shuji Nakamura for the invention of efficient blue light emitting diodes which has enabled
00:29bright and energy-saving white light sources.
00:34Nobel laureates are rewarded for having invented a new energy-efficient and environment-friendly
00:41light source – the blue light emitting diode .
00:46In the spirit of Alfred Nobel, the prize rewards an invention of greatest benefit to mankind.
00:53Using blue LEDs, white light can be created in a new way.
00:58With the advent of LED lamps, we now have more long-lasting and more efficient alternatives
01:05to older light sources.
01:08When Isamu Akasaki, Hiroshi Amano and Shuji Nakamura produced bright blue light beams from their
01:15semiconductors in the early 1990s, they triggered a fundamental transformation of lighting technology.
01:24Red and green diodes had been around for a long time, but without blue light.
01:30White lamps could not be created.
01:32Despite considerable efforts, both in the scientific community and in industry, the blue LED had
01:39remained a challenge for three decades.
01:43They succeeded where everyone else had failed.
01:47Akasaki worked together with Amano at the University of Nagoya, while Nakamura was employed at Nichia Chemicals,
01:54a small company in Tokushima.
01:57Their inventions were revolutionary.
02:00Incandescent light bulbs lit the 20th century.
02:05The 21st century will be lit by LED lamps.
02:09White LED lamps emit a bright white light, are long-lasting and energy-efficient.
02:15They are constantly improved, getting more efficient with higher luminous flux, measured in lumen per
02:21unit electrical input power, measured in Watt.
02:26The most recent record is just over 300 lumens per Watt, which can be compared to 16 for regular
02:33light bulbs and close to 70 for fluorescent lamps.
02:38As about one-fourth of world electricity consumption is used for lighting purposes.
02:43The LEDs contribute to saving the Earth's resources.
02:49Materials consumption is also diminished as LEDs last up to 100,000 hours, compared to 1,000
02:58for incandescent bulbs and 10,000 hours for fluorescent lights.
03:03The LED lamp holds great promise for increasing the quality of life for over 1.5 billion people
03:11around the world, who lack access to electricity grids.
03:15Due to low power requirements, it can be powered by cheap local solar power.
03:21The invention of the efficient blue LED is just 20 years old, but it has already contributed
03:28to create white light in an entirely new manner to the benefit of far-sore.
03:35Isamo Akasaki was born in Chiran, in the Kagoshima district of Japan.
03:41After studying electrical engineering at the University of Kyoto, he began working at the
03:46electronics company Kobe Kaugeo Corporation.
03:50He returned to academia and received his doctorate in 1964 from Nagoya University.
03:56After having worked many years at the electronics company Matsuhita, in 1981 he became a professor
04:03at Nagoya University, and then eventually at major university also in Nagoya.
04:10Hiroshi Amano was born in Hamamatsu, Japan.
04:14He studied electrical engineering at the university in Nagoya, which also awarded him his doctorate
04:20in 1989.
04:23In 2002 he became a professor at Meiji University in Nagoya, and later moved to Nagoya University.
04:30Shuji Nakamura was born in Ikata, Japan.
04:34After studying electrical engineering at the University of Tokushima, he worked at the chemical
04:39and electronics company Nietzsche in Tokushima.
04:44This is where he conducted his Nobel Prize-awarded work.
Be the first to comment
Add your comment