LED is called fourth-generation lighting source or green led desk light  is a solid-state semiconductor light-emitting devices. In 1955, the U.S. radio company RubinBraunstein found the infrared radiation of gallium arsenide (GaAs) and other semiconductor alloys role, in 1962 the U.S. General Electric Company (GE) NickHolonyakJr developed visible light LED, LED real take-off white LED appeared in the 1990s, began to gradually great importance to the increasingly wide application surface.
In recent years, LED facing explosive growth, mainly due to the rapid growth of the national policy support as well as downstream demand for TV backlight future decline in the cost of large-scale general-purpose lighting alternative. It can be said that, over the next five years, will be the golden period of growth of the LED industry.
The world's five major LED manufacturers
The face of global climate change and soaring energy prices, governments have begun to some of the high-energy-consuming products listed as a primary object of disabled, such as incandescent bulbs is the most obvious case. The incandescent bulbs disabled from the European Union and Japan first began, Governments after another to follow later. Timetable to be observed from all countries to ban incandescent bulbs after 2012, most countries began to ban incandescent bulbs, but also bring huge business opportunities for LED lighting.
The company really have the strength to engage in a full-service on the keychain flashlight  industry chain is relatively small, mainly the United States, Japan, and South Korea's leading enterprises. Abroad has five largest manufacturer of large-scale LED Cree (CREE), Germany's Osram (Osram), the Netherlands, Philips (Philips), Japan's Nichia (Nichia) and South Korea's Seoul Semiconductor