About LED

1）LED (Light emitting diode) Introduction
What is LED?
LED stands for Light Emitting Diode, a kind of semiconductor which is used to give and receive the electronic signal into infrared rays or light, using the characteristics of compound semiconductor.

LED History
LED emerged in early 1960’s by using the semi-conductor light emitting theory, red LED and yellow LED emerged in 1964, blue and green color LED came out in 1994. White LED was developed in 1996. In recent years, with people’s deeper research of semiconductor luminescent materials, LED manufacturing process has been greatly improved and new materials (nitrogen and phosphor crystals) are developed and applied to use, super bright LED of different color has been developed and with light efficiency thousands of times higher than before. In the history of lighting, High Brightness LED is one of the greatest inventions after Edison invented the incandescent bulbs.

LED Application
LED has inherent characteristics, such as energy saving, long life, shock resistant, fast response, cold source make it very suitable to be used as indicator lights, display, landscape lighting, and other fields. We can also find LED applications in our daily life everywhere: home appliances, telephones, the dashboard lighting, vehicles fog lights and traffic lights. However, due to the limits of its packaging, heat radiance, high cost, temporarily it is not suitable to be used as a universal lighting source. LED display is one of the mature parts.