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Blue LED | What is Blue Light emitting diode

Blue LED | What is Blue Light emitting diode

Blue-light-emitting-diode

In the year 2014 Nobel Laureates are rewarded for having inveTnted a new energy-efficient and environment-friendly light source - the blue light-emitting diode (LED). In the spirit of Alfred Nobel the Prize rewards an invention of greatest benefit to mankind. Using blue LEDs, white light can be created in a new way. With the advent of LED lamps we now have more long-lasting and more efficient alternatives to older light sources.
Inventors Of Blue LED :                      
Investors-of-blue LED | Isamu-Akasaki-Hiroshi-Amano-and-Shuji-Nakamura
Isamu Akasaki, Hiroshi Amano and Shuji Nakamura

       The inventors of blue light emitting diodes, that hold the promise to brighten the quality of life of over 1.5 billion people around the world who lack access to electricity grids, were awarded the 2014 Nobel Prize for physics on 7th October. Japan-born professors Isamu Akasaki, Hiroshi Amano and Shuji Nakamura made the first blue LEDs in the early 1990s and were awarded for inventing an energy-efficient and environment-friendly light source. Nakamura could be among the rare Nobel winners to have got the prize before completing a PhD. Nakamura who was woken up by the Nobel Committee to share the news, said, "This is unbelievable."
BLUE LED :                              
        According to the Royal Swedish Academy of Science, the invention has revolutionized the field of illumination technology. LED lamps are flexible light sources, already with several applications in the field of illumination. Committee chairman Staffan Norman said : "Alfred Nobel would have been very happy with this invention. Artificial light is all around us. The invention of the LED, however, will be highly beneficial and safer than older light sources. For example, fluorescent light has mercury whereas LEDs doesn't. In future, it can be used to sterilise water as we know that UV light can kill bacteria and viruses. It has been known since 1671 that to get white light, we have to combine red, green and blue light. Red and green light have been around for half a century. Now we have blue which we can mix and create new white light sources."
The LED lamp holds great promise as due to low power requirements it can be powered by cheap local solar power. As about one fourth of world electricity consumption is used for lighting purposes, the LEDs contribute to saving resources. Materials consumption is also diminished as LEDs last up to 100,000 hours, compared to 1,000 for incandescent bulbs and 10,000 hours for fluorescent lights. When Akasaki, Amano and Nakamura produced bright blue light beams from their semiconductors in the early 1990s, they triggered a fundamental transformation of lighting technology. Despite considerable efforts, both in the scientific community and in industry, the blue LED had remained a challenge for well over three decades. The three physicists succeeded where everyone else had failed.
The LED Story :                          

  • # Red and green diodes had been around for a long time but without blue light, white lamps could not be created.
  • # White light is made from combining light from every other colour, but before blue LEDs, one crucial part of the spectrum was missing.
  • # The invention of the blue LED was the final key to using light-emitting diodes-low power, long-lasting sources of light.
  • # You can see it in your smartphone screen - where low heat output and slim size of LEDs are a selling point.
  • # it's also there in the back-light of a LED TV, where the low power usage lets manufactures trumpet cheaper electricity bills.
  • # LED lamps emit a bright white light, which are long-lasting and use far less energy compared with the incandescent light bulb pioneered by Thomas Alva Edison in 19th century.
  • # Because they have very low electricity needs, LED lights can be connected to cheap, local solar power-a benefit for the more than 1.5 billion people around the world who lack access to the electricity grid.
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