Two Japanese and one American recently won physics Nobel Prize for inventing blue light emitting diode. Before this invention, scientists had already invented green and red LEDs, but blue LED was needed and researchers were working for almost 30 year for creating the same. But the question arises here is why this invention was awarded a physics Nobel Prize? What is the importance of LEDs in our day to day life? Well the answer is clear; LED’s are energy efficient, durable and produces more light. Soon they will replace all the traditional light bulbs.
LED’s have been in use since the time of their invention. There was a time when these advanced lighting options were only installed in high end cars. But now the picture is different. LED’s have become an essential part of households too due to their various advantages.
Professors Isamu Akasaki, Hiroshi Amano and Shuji Nakamura created the first blue LEDs in the early 1990s. Although this was not the beginning (as discussed earlier red and green LED’s were already there in the markets) but this invention was necessary as white LED’s were really needed.
Big companies were trying to make the same but they failed but this trio tried again and again and eventually succeeded.
Today blue LEDs are everywhere. With 20% of world’s electricity is used for lighting, it is estimated that optimal use of LED lights could reduce the same to 4%.
Have a look at this LED Infographic:
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