Since 1968 the first LED began to enter the market, it has been 30 years till now. Along with the development of new materials and process improvement, LED tends to be of high brightness and full-color. Gallium nitride basal blue LED’s appearance expanded the LED application fields. At present the main application fields of LED includes big screen color display, lighting lamps and lanterns, lasers, multimedia imaging, LCD background sources, detectors, traffic lights, instruments and meters, optical communications, satellite communications, Marine optical communication and graphic recognition, etc, but so far it is mainly used in lighting and display fields.
The super high-intensity lamplight of LEDs are produced by superconducting glow crystals, it sends out rarely heat. It does not like incandescent lamp that waste too much heat or not like fluorescent produced poisonous gases for consume high-energy, or not like neon that require high voltage and easy to cause damage. LEDs have been universally recognized as a new generation of environmentally high-tech illuminant.
LED light source application is very flexible, which can make into dot, line, face various forms of thin short products; LED control is extremely convenient, just by adjusting the current we can free adjust the light; The combination of different light color has variable changes, using sequential control circuit can achieve more rich and colorful dynamic change effect. LEDs have been widely applied in all kinds of lighting equipment, such as batteries flash, miniature sonic lamp, safety floodlight, outdoor road and indoor stair floodlight and buildings and marking continuous lighting.