1907 Henry Joseph Round first the electroluminescent phenomenon observed in a silicon carbide. Because of its yellow light emitted is too dark, not suitable for practical applications; silicon carbide electroluminescent more difficulty lies not well adapted for the study was abandoned.

 

The 1920s, the late Bernhard Gudden and Robert Wichard use in Germany the yellow phosphorus luminous refined zinc sulphide and copper. Again stopped emitting dim.

 

In 1936, George Destiau, published in the reports on ZnS powder emitted light. With the current applications and a wide range of understanding, and ultimately "electroluminescent" term. In the 1950s, British scientist using the semiconductor gallium arsenide electroluminescent experiments invented the first modern sense LED and available in the 1960s. It is said that in the early trials, the LED needs to be placed in liquid nitrogen, and more further action is required to enable high-efficiency work at room temperature and Breakthrough.

 

The first commercial LED only can only be issued to the invisible infrared light, but were quickly applied to the field of inductive and photoelectric. The late 1960s, the GaAs matrix phosphide invented the first visible red LED. Gallium phosphide change makes the LED more efficient, brighter red glow, and even produce an orange light.

 

Gallium phosphide is used as a light-emitting light source to the mid-1970s, followed by the issue of gray Bai Lvguang. LED double the gallium phosphide Ruipian (one red the other is green) yellow light. At this time, the Russian scientist emery manufacturing emit yellow LED. Although it is not as good as Europe's highly efficient LED. But in the late 1970s, it issued a the purely green light.

 

The early 1980s to the mid-term use of gallium arsenide aluminum phosphide makes the first generation of high brightness LED was born, first red, followed by yellow and finally green. In the early 1990s, the use of indium aluminum gallium phosphide produce orange, orange, yellow and green LEDs. The first blue LED historical significance also appeared in the early 1990s, again using emery - the early days of the semiconductor light source obstructions. According to today's technology standards to measure, it is the same with Russia before the yellow LED light source bleak.

The mid-1990s, the emergence of ultra-brightness GaN LED was then manufactured that produce high-intensity green and blue indium nitrogen gallium Led. The super brightness blue Ruipian white LED core the fluorescence phosphorus in this luminous Ruipian cast, then fluorescence and then converted to white phosphorus by absorbing blue light from microarrays. Is to use this technology to create any visible color of light. Today you can see on the LED market produced novelty colors such as light green and pink. With the technological progress of mankind in the field of LED super brightness LED use in consumer electronics are increasingly being used.