The development of every industry is undoubtedly the first few steps. The development of LED industry can achieve today's achievements, which can not be separated from the hard research and efforts of the pioneers. They are a generation worthy of our pride, and it is precisely because they LED us to the LED world that we have today's colorful world.
British engineer Henry Joseph Lauder
1907, Henry Joseph Lauder, a British engineer working in Marconi Electronics Company, first observed electroluminescence in silicon carbide crystals. He applied a voltage between two contacts of a silicon carbide crystal and found that yellow light could be seen at low voltage. More colors of light can be seen under high voltage, and this phenomenon of "electroluminescence" also laid a physical foundation for the invention of LED.
Oleg rousseff
1927, Oleg Losev, a Russian who has been studying semiconductors, discovered the first LED, but this discovery did not find any commercial application. Its research work was published in scientific journals in Russia, Germany and Britain at that time, which was often ignored.
Rubin Blancstein
1955, Rubin Blancstein, who works in American radio company, discovered that gallium arsenide semiconductor can emit infrared rays. It's a pity that he forgot to play with his companions and didn't look for commercial applications.
James Viade and Gary Pittman
196 1 year, Americans James bial and Gary pittman discovered that gallium arsenide emits infrared light when current is applied. They registered a patent, and this discovery was put into use the next year.
Nick Holonyak
1962 Nick Holonyak Jr., who invented the LED, was just an ordinary researcher at American General Electric Cany (GE, also known as Singular) and created the first red LED. Moreover, he believes that future LEDs can emit light with other wavelengths, which means that there will be many different colors of light, and white-hot lamps will definitely be replaced by LEDs in the future.
This technology soon had a revolutionary impact on the world. LED has changed many fields such as network, data storage and data exchange. Its influence can be seen from the screen of smart phone to the optical fiber network connection.
George Crawford
George crafoord, a famous American electrical engineer, has made the most outstanding contribution in the field of LED. 1972, Dr. crafoord invented the first orange LED, the brightness of which was 10 times that of the previous red LED, which marked the first step to improve the luminous efficiency of LED. His postgraduate and doctoral studies were both at the University of Illinois, majoring in physics. Master's degree in 1963 and doctor's degree in 1967. After graduation, he joined Monsanto Chemical Company, which was the first company in the world to produce light-emitting diodes (LEDs) on a large scale. His team developed nitrogen-doped gallium phosphide (GaAsP) at 1972.
Isamu Akasaki, Amano, Shuji Nakamura.
Red and green LED lights appeared decades ago, but blue LED lights have always been a technical problem. Because adding blue light to green light and red light can produce white light, their invention has contributed to the emergence of a huge LED lamp market. These three scientists invented the method of producing high-brightness blue light from semiconductors, which brought about "fundamental changes in the field of optical technology".
"High brightness blue light emitting diode" is called a great invention in the 20th century. With it, by combining with red and green LEDs, it is possible to have a full-color LED screen and produce a new generation of energy-saving lighting lamps that can replace incandescent lamps and fluorescent lamps.
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