Guide: When it comes to LED, everyone will not be unfamiliar, the most common is LED lighting. Because LED has the advantages of low working voltage, low energy consumption, low radiation, light weight and so on, it is trusted and supported by consumers. But do you know the development history of LED lights? LED is born in Xinjiang but the industry itself is not very local in Xinjiang. Good development. The following small series will tell you about the development of LED lights and the principle of LED lights, I hope to help everyone. LED light The development of LED lights, global energy shortages and environmental pollution are particularly prominent in China's rapid economic development. Energy conservation and environmental protection are urgent problems for China to achieve sustainable socio-economic development. Annual lighting power consumption accounts for about 12% to 15% of total power consumption. As a major energy consumer, we must find a new generation of energy-saving and environmentally friendly light source that can replace traditional light sources as soon as possible. LEDs have advantages over traditional lighting sources, such as lower power requirements, better drive characteristics, faster response speed, higher shock resistance, longer life, green and fast The improved luminous efficiency and the like have become the next generation of light sources that are most likely to replace traditional light sources in the world. Although the semiconductor lighting industry has just started, there are still many problems to be solved in LED lighting. However, with the rapid breakthrough of compound semiconductor technology and the continuous improvement of packaging technology, the application of LED in the field of lighting has begun to form and gradually expand. At present, the low luminous efficiency of LEDs and the high cost of luminous flux are two major bottlenecks restricting their large-scale entry into the field of lighting. At present, the application fields of LED mainly focus on signal indication, intelligent display, automobile lighting, landscape lighting and special lighting. The development history of LED lights, on June 17, 2003, led by the Ministry of Science and Technology to establish a “National Semiconductor Lighting Project Coordination Leading Group†across sectors, regions and industries. From the establishment of the Coordination Leading Group to the end of 2005, this period will be the emergency start-up period for the semiconductor lighting project. Starting from the "Eleventh Five-Year Plan" in 2006, the country will promote semiconductor lighting engineering as a major project. In 2003, China's per capita GDP broke through the $1,000 mark for the first time, and its economic strength has been further enhanced. It has initially possessed the ability to accept light sources with higher luminous flux costs (initial costs). In the next 5 to 10 years, solid-state lighting lamps using semiconductor LEDs as light sources will gradually replace traditional lighting and enter every corner. It is an irresistible trend to replace traditional lighting sources with semiconductor LED solid-state light sources. After years of development, China's semiconductor LED industry chain has been relatively perfect and has a certain development foundation. At the same time, China is also a big country in the lighting industry. As long as the government and the industry properly coordinate and integrate properly, it is very promising to develop the semiconductor LED lighting industry. The LED semiconductor lighting market has great potential and its development prospects are widely optimistic. For a long time, due to the low light efficiency of LEDs, their applications have mainly focused on various display fields. With the advent of ultra-high brightness LEDs (especially white LEDs), applications in the field of lighting have become possible. According to the prediction of international authoritative organizations, the 21st century will enter the era of new lighting sources represented by LEDs, known as the fourth generation of new light sources. LED light The development history of LED lights, China's lighting industry network said that at present, lighting consumption accounts for about 20% of the total power consumption, greatly reducing lighting power is an important way to save energy. To achieve this goal, the industry has researched and developed many kinds of energy-saving lighting. Appliances and achieved certain results. However, the requirement of “green lighting†is far from enough. It is imperative to develop and apply new light sources that are more efficient, reliable, safe and durable. LEDs are attracting the attention of the world with their inherent superiority. The United States, Japan and other countries and Taiwan have predicted the LED lighting efficiency. The US 55% incandescent lamp and 55% of the fluorescent lamps have been replaced by LEDs, saving 35 billion US dollars in electricity bills every year and reducing 725 million tons of carbon dioxide emissions every year. The replacement of 100% incandescent lamps in Japan with LEDs can reduce the power generation of one or two nuclear power plants and save more than 1 billion liters of crude oil per year. In Taiwan, 25% of incandescent lamps and 100% of fluorescent lamps were replaced by white LEDs, saving 11 billion kWh per year. As early as 1998, Japan compiled the "21st Century Plan" to conduct practical research on LED light sources for lighting. In recent years, Japan's Nichia Chemical, Toyota Synthetic, SONY, Jiayou Electric, etc. have all come out with LED lighting products. World-renowned lighting companies such as Philips, Osram, GE, etc. have also invested a lot of manpower and resources in the research and development and production of LED lighting products. GE and EMCORE have partnered to form a new company to develop white LEDs to replace incandescent, compact fluorescent, tungsten halogen and automotive lamps. Germany Osram and Siemens cooperate to develop LED lighting systems. Taiwan's current LED production is second only to Japan's prior to the United States. Since 1998, it has invested 600 million Taiwan dollars in related development work. The development history of LED lights, LED development history has been for decades, but the application in the field of lighting is still new technology. With the rapid development of LED technology and the gradual improvement of its luminous efficiency, the LED application market will be more extensive. Especially in the context of the global energy shortage worry, the prospect of LED in the lighting market has attracted worldwide attention. The industry believes that the most promising market and the largest market in the next 10 years will be the largest potential commodity to replace incandescent, tungsten and fluorescent lamps. The principle of LED lamp illumination, its illumination process consists of three parts: carrier injection under forward bias, composite radiation and optical energy transmission. The tiny semiconductor wafer is encapsulated in a clean epoxy. As the electrons pass through the wafer, the negatively charged electrons move to and recombine with the positively charged hole region, and electrons and holes disappear to produce photons. The greater the energy (band gap) between electrons and holes, the higher the energy of the photons produced. The energy of the photon in turn corresponds to the color of the light. In the spectrum of visible light, the blue light and the purple light carry the most energy, and the orange light and the red light carry the least energy. Since different materials have different band gaps, they can emit light of different colors.
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The development of LED lights
LED light principle