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The History of LED Lights |
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The history of LED lights leads right up to today when we cant purchase an electronic device without seeing LED in the description. Years ago this was not the case. As recently as 1900 Electroluminescence hadn't even been discovered. I'm sure that at the time, this was no great hardship for people, but nowadays it is hard to imagine a life without LED lights. In 1907 H.J. Round was working for Marconi Labs, he discovered Electroluminescence using a cat's whisker detector and a sliver of silicon carbide. This is the first recorded discovery of electroluminescence. No more was done using this viable light source until 1927 when Oleg Vladimirovich Losev reported that he had created an LED, or light emitting diode. The research that Mr. Losev provided was shared in scientific journals the world over. However, again, no one came up with a practical use for the LED. In 1961, American scientists Robert Biard and Gary Pittman discovered that GaAs when paired with electric current emitted an infrared radiation. This was the first time that a patent was issued for an infrared LED. Bringing LED into use as a visible spectrum light, Nick Holonyak Jr who worked for General Electric, developed the first visible LED in the color red, back in 1962. His student M. George Craford invented the yellow LED, and helped improve the intensity of the original LEDs. In 1968 the Monsanto Company was the first company to use gallium arsenide phosphide to mass produce visible LEDs. This mass production helped develop handheld calculators. As the 1970s moved in a company called Fairchild Optoelectronics began producing LEDs for less than 5 cents each. This made LED lighting for electronic devices much more common and mainstream as the world continued to grow and expand. The world of electronics is ever changing, and always improving. The ability to integrate many different colors and sizes of LED lights have made cell phones, auto displays, VCR and DVD players and many other electronic devices much smaller, and user friendly. When it comes to LED usage once the new millennium rolled in, LED has become used more often in home lighting, commercial lighting, and many other applications. From the first time way back in 1907 when Mr. Round stumbled upon electroluminescence all the way up to today when it is nearly impossible to pick up an electronic device that doesn't use LED in some form or another, this basic diode and the current and wavelengths which make it work has been evolving . Long lasting, less heat, less energy and now even lower cost, makes LED lighting for electronics and the home a smart choice. LED lighting is instant on and instant off, with no warm up time or flickering. To put it simply an LED light either works or it doesnt. If it doesnt work then it is pretty much a simple matter to replace the individual LED that is causing the problem. LED lighting has come a long way in the past 100 years and the future is looking bright for this alternative lighting source. |