Q3: What is the brief history of LEDs ?
Column:FAQ Time:2018-07-10
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FAQ3

A3 Answer: Electroluminescence was first discovered in 1907, but the first LED wasn't created until 1927, although no practical use was found for it. It wasn't until 1962 that the first visible light LEDs were created, glowing red. In the 70's other colors of LEDs were discovered, but blue LEDs were not bright enough for practical use until 2002. The 2014 Nobel Prize in physics was awarded for the invention of a practical, high-intensity blue LED, as it opened the door to many applications of LEDs, including replacing incandescent and fluorescent lighting indoors for humans, as well as LED plant grow lights.