In October 2014, the Nobel committee of the Royal Swedish Academy of Sciences announced the Nobel Prize in physics of 2014 goes to the inventors of blue LED - Isamu Akasaki and Hiroshi Amano of Japan and US scientist Shuji Nakamura.

“Scientists had struggled for decades to produce the blue diodes that are a crucial component in producing white light from LEDs when the three laureates made their breakthroughs in the early 1990s.”

The birth of blue LED is a breakthrough that spurred the development of LED technology. It’s well known that the three primary colors of light– Red, green and blue, are the basic color that could produce any other colors. White light can be generated by two methods. One is  mix several monochromatic, the other is to use the blue LED to stimulate phosphor. The invention of blue LED makes the process more easy and efficient. It enables us to replacing incandescent and fluorescent lights with LED lights which are more energy-efficient and environment friendly.