LED is the abbreviation of "Light Emitting Diode".  LED Lighting is also known as Solid-State Lighting (SSL).  LEDs, which are environmental-friendly, power-saving and long-lasting, have caused a revolution in illumination in the 21st century leading to an emergence of whole new industries.  LEDs are a compound semiconductor using III-V (GaAs, AlGaInP, Gan, AlN ...) or II-VI (ZnSe, ZnO ...) as light emitting materials with the advantages of small size, low power consumption, longetivity and color purity.  Today, LED’s have become widely used in a variety of devices we use on a day to day basis..

There are also a number of different packaging methods for LED. The emitted light can either be visible and invisible. Visible LEDs, which are commonly used for displaying and lighting, are usually categorized into High Brightness (HB) and general brightness by 1 Cd. HB LED’s and High Power LEDs. General brightness LED’s are normally used for CHMSLs, signages, traffic signs, backlighting of keypad, LCD, and so on.  Invisible LEDs are used for CCTVs, Remote Controllers, Power Supply switchboards, Sensors... and so on.