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Development of LED lamps Dec 21, 2016

For general lighting, people need a white light source. 1998 white light LED drive

The successful. This LED to GaN chip and yttrium aluminium Garnet (YAG) packaged together to make. GaN chip blue (λ p =465nm, Wd=30nm), high temperature sintering of YAG phosphor containing Ce3+ is affected by this Blu-ray activated yellow light emission, peak 550nm. Blue LED mounted on the Bowl-shaped reflecting cavity of the substrate and covered with resin mixed with YAG thin layer, about 200-500nm. Blu-ray part of the issue is the phosphor LED substrate absorption, another part of mixing blue and yellow phosphor issued, you can get white light. InGaN/YAG white LED, by changing the chemical composition and regulation of YAG phosphor phosphor layer thickness, color temperature 3500-10000K colors of white light can be obtained.

Blue LED technology, it simply is a more energy-efficient lighting gives way, also applies to cameras, mobile phones and other technology products. Made of blue-light LED technology lighting more energy efficient and greatly reduce energy use. According to the existing data show that 25% of the world's electricity is used for lighting, and after the use of LED lighting, power for lighting and 4%, and it certainly has changed the entire world.

From 1907 LED effects found to 1993 Shuji Nakamura LED the formal invention, then in 1999 1W LED light commercial use, LED after nearly 100 years of development. Until then, people have been using last century Edison invented incandescent, incandescent bulbs waste the most energy in heating, about 90% of electricity is wasted.

LED lamps appear needed to substantially reduce lighting power, the same wattage LED lamps, the required power only incandescent 1/10 and LED with long service life and environmental protection, maintenance-free advantages quickly to replace incandescent lamps. In 2012, the Chinese Government announced that more than a total ban on the sale and import of 100-watt incandescent lamps for general lighting, accompanied by Chinese people of the older generation decades of incandescent lamps are about to go to the end of history.

As written in the Nobel Physics Prize citation: "incandescent light in 20th century, and the LED lights will illuminate the 21st century.