LED lighting LED lighting principle is Ⅲ-Ⅳ compounds, such as GaAs (gallium arsenide), GaP (Gallium Phosphide), GaAsP (gallium arsenide phosphorus) and other semiconductor made of, its core is a PN junction. IN feature so that it has a general PN junction that is forward, reverse blocking, breakdown characteristics. In addition, under certain conditions, it also has luminescent properties. In the forward voltage, electrons from the N zone injection P area LED lighting technology, the hole injection from the P region N region. Into other areas of minority carriers (minority) part of the majority carriers (many children) composite and light. Assume emitting occurred in the P region, the injected electrons and valence band holes direct composite and light, or light-emitting center was first captured, then with the hole recombination. In addition to this light-emitting compound, some electrons are (between the center of the conduction band, dielectric belt near the middle) non-luminescent center capture Daquan LED lighting, and then with the hole recombination, each time the energy released is not, can not form visible . Emitting composite volume relative to non-emitting composite volume ratio, the higher quantum efficiency. Since the compound is in the minority carrier diffusion area glowing, so light produces only near PN junction within several μm. Theory and Practice shows that the peak wavelength λ of the light band gap semiconductor material emitting region Eg about that λ≈1240 / Eg (mm) where Eg units of electron volts (eV). If you can produce visible light (wavelength of 380nm violet ~ 780nm red), Eg of semiconductor materials should be between 3.26 ~ 1.63eV. Longer wavelength than the red light to infrared light. Now there are infrared, red, yellow, green and blue light-emitting diodes, but blue-light LED cost, the price is high, use not common. LED lamp white LED lights Way promotion and popularization of great significance, but really want to enter people's homes in the country have a lot of work to do, to be technically (luminous efficiency of 120 ~ 150lm / W), price upper (lower than the current price of 8 to 10 times) a major breakthrough, but also requires constant effort. Promotion and popularization of white LED lighting is a system engineering, major projects, require national planning, guidance and support, and financial support for the policy. China is now in Shanghai, Nanchang, Dalian, Xiamen has established four semiconductor lighting bases and scientific research units, they will work to promote the LED lights play a major role. Currently LED lights into people's homes, although harder to LED lighting, but there are many areas of the large scale application of LED lights. Applications in these areas can promote the production of high-power white LED, can promote the improvement of technology, and reduce production costs. On the LED lighting design, application can be obtained more experience, is conducive to the promotion of the future. These applications are large electricity for energy-saving can play a significant role. They are: 1 urban street lights systems (including solar street lighting systems); 2 tunnels and underground parking (including underground shopping mall); 3 vehicle lighting (car, train, ship, aircraft and other internal and some external... lighting); 4 large public spaces LED lighting systems LED lighting _ Xi Yong city Connaught Electrical and Mechanical _LED lighting price provided by the Henan learning Connaught Electrical and Mechanical Equipment Co., Wing City LED lighting _ Xi Connaught Electrical and Mechanical _LED lighting price promise Henan Xi Electrical Equipment Co. (www.hnxinuo.com) this year introduced a new upgrade, the above picture is for reference only, please call the contact picture on this page or telephone obtain the latest information, contact: Yang Yongjie.