Electronic enthusiast network [compilation / vincent]: White LED technology has well occupied the field of backlight display and camera flash. Within five years, the lighting used in the United States and most other parts of the world will shift from incandescent and fluorescent lights to solid-state light, because LEDs can make electronic transitions better than incandescent lamps, thereby emitting photons, and have more Longer life.
In the United States alone, the use of LED lighting is likely to reduce energy consumption by nearly half compared to ordinary lighting. The U.S. Department of Energy estimates that at current prices, energy savings can total $ 250 billion over the next 20 years, and reduce greenhouse gas emissions from 1.8 billion metric tons of carbon. This historical change cannot be accomplished without the rapid development of blue light source LEDs.
In the rapidly developing electronics field, LEDs have been around for quite a long time, dating back to the first red light-emitting diodes exhibited in the 1970s. These low-power LEDs were originally red light sources, but yellow light sources were quickly developed and used as indicators or display functions, not just general lighting. However, research institutions in this field have been unable to develop blue light source LEDs.
Shuji Nakamura is a young master engineer working in a company specializing in providing fluorescent powder for fluorescent lamps and CRT displays-Nichia Chemical, which was still a small company at the time. For some time he became more and more frustrated because he lacked the ability to develop new products required by the company. He can only develop new products based on what the salesperson says to meet market demand, and when they cannot sell successfully, they will only blame.
In this case, Nakamura decided that he would leave the company if necessary, but during this period, he will work hard to do a project that he personally considers important, and the project must be large, challenging, and bold of. Nakamura finally decided to focus on inventing the blue light source LED that has plagued companies and research institutes for many years and has not been successful so far.
He could n’t get support from the boss in the head. When he mentioned this goal, his boss replied: “Are you stupid? So many big companies have tried and failed. How do you think that if you have no budget To realize it in a small company with suitable equipment? "In order to continue to go and find support, Nakamura came to the office of the founder of Nichia Chemicals one morning and said," I want to develop a blue light LED! " To his surprise, he got permission from the founder to continue his project.
His only pursuit was to make a blue light source LED based on gallium nitride, and it succeeded in the end. With the addition of phosphor coating, Nakamura's blue light source LED reached the peak of solid-state light source. Working in a society that is not alone, Shunji Nakamura, who has no retreat, has almost exclusively undertaken the research and development of blue light source LEDs. Many other companies, such as LumiLEDs, Osram and Cree, are competing to acquire new technologies, but Nichia has always maintained a leading edge.
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