LEDs create new lighting technology

Led is the abbreviation of the phrase Light Emitting Diode, which is understood to be light emitting diodes (diodes emit light when electricity is applied to it). From the early years of the twentieth century, people invented the technology of led lights . In 1907, British scientist HJ Round invented the first light-emitting diode, followed by Russian scientist Oleg Vladimirovich Losev, who created the first luminaire, but this achievement soon fell into place. forgotten when it is not widely known.

It was not until 1961 that two American scientists, Robert Biard and Gary Pittman, working in Texas, discovered that GaAs emit infrared light when electricity was applied to it. Made out of infrared leds.

In 1962, the first red light led by Nick Holonyak Jr. Then, in 1972, George Craford invented the first yellow light bulb that was 10 times brighter than the light of the red and orange leds.

And it was not until 1994 that the first blue LED light made from InGaN was invented by Nicholas Corporation’s Shuji Nakamura. Then, people took the yellow light mixed with blue light and added a layer of compound called YAG to give birth to white light.Up to 10 years later, Nakamura was awarded the Centenary Technology Award for inventing blue light.

LEDs create new lighting technology

When comparing leds with incandescent bulbs, the filament lamp will find that the leds produce 4 to 15 times more efficiency than the other ones. When compared with fluorescent lamps, leds consume less energy and, in particular, contain no toxic mercury.

Energy saving, LED also has the advantage of long life, the life of the leds 30 times more than the incandescent lamp. On average, a luminaire will have a lifespan of 25,000 hours. If a bulb is activated every 4 hours, it will light up in a 17-year cycle.

Especially since the invention of the blue light of Nakamura was born, the LEDs became more and more popular in our lives. From traffic lights, advertising signs to home lighting led lights … all have the contribution of led lights. The Royal Swedish Academy of Sciences has evaluated the invention of led lights that marked the birth of technology that could change the world.

 

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