"LED" is not really a new term, but it has been a bit far from everyday life. It is a simple "Lighting Emitting Diode" in the physics world. It uses a solid semiconductor chip to emit energy, and can directly emit red, yellow, blue, green, cyan, orange, purple, white and other colorful light.
Today, however, in the streets and lanes, such a charity donation box may have attracted you to show your love: it can broadcast public service advertisements and send a thank-you to the donors; in home accessories stores, such alternative photo frames may be particularly addictive: it can Continue to produce a soft backlight to make the photo crystal-like... After the semiconductor technology revolution led to the microelectronics industry revolution, it will brew a new "light revolution": LED is changing the city in a quiet and silent way. And life.
Many people in the future of lighting may be unbelievable. The lighting fixtures we use today, apart from the improvement of filaments, are not fundamentally different from the Edison era. With the upgrading of the indoor and outdoor decoration industry, indoor nightlights, lawn lights of public green spaces, and building landscape lights have placed high demands on cost reduction and energy saving, and existing lighting equipment has entered a “bottleneck periodâ€.
Tsinghua Science and Technology Park Optoelectronics Co., Ltd. has the first domestic LED production line with a mass production of more than 60 lumens per watt. The company's technical staff said that as a new type of semiconductor light source, LED's most significant advantages are energy saving, environmental protection and longevity. LED energy consumption is only 10% of incandescent lamps and 50% of fluorescent lamps; it is solid-packed, has a solid structure and can last up to 100,000 hours, 10 times that of fluorescent lamps and 100 times that of incandescent lamps; it does not require glass vacuum packaging. No toxic gas and mercury pollution. Chen Lianghui, an academician of the Chinese Academy of Engineering, calculated an account: 15 years to invest 5 billion to 10 billion yuan to develop the industry, equivalent to rebuilding a "Green Three Gorges Project" with only 5% of the Three Gorges Project.
In recent years, the world's three major lighting industry giants - General Electric, Philips and Osram have set up semiconductor lighting companies, developed countries have even started national projects, hoping to seize the commanding heights of emerging industries. The US Department of Energy has set up a national research project for semiconductor lighting. It is planned that more than half of incandescent lamps and fluorescent lamps will be replaced by 2010. In 2025, the US lighting power consumption will be reduced by half compared with the current one--this must be achieved by the current $50 billion annual light source industry. To support; Japan plans to save the equivalent of one or two nuclear power plants through semiconductor lamps.
In China, the Chinese Academy of Sciences has carried out relevant research as early as the 1960s, but the pace of industrial advancement has lagged behind. The industry analysts believe that the gap between China's LED technology and the international advanced level is not large, as long as the overall promotion is appropriate, a solid-state lighting industry with core competitiveness is forming.
However, the popularity of LED lighting in the LED industry still needs a “thrilling leapâ€: its photoelectric conversion efficiency is low, but the price is high, even if developed countries still need to overcome the cost. Yu Wei, a professor at East China University of Science and Technology who specializes in LED light sources, pointed out: "The LEDs are slower in heat dissipation than other light sources, and heat transfer is three orders of magnitude lower than that of metal materials. It is currently difficult to handle square lighting, building facades, and park landscapes. Light and other glare lighting tasks. If some buildings with long history and serious style adopt LED light source, they will not only lose the original charm, but also bring new light pollution.†He pointed out that the absolute advantage of LED lighting is in the small environment. And local lighting. Therefore, when considering entering the industry, enterprises should measure their own conditions and clarify the direction of the market. There is no need for a glimpse.
1
Today, however, in the streets and lanes, such a charity donation box may have attracted you to show your love: it can broadcast public service advertisements and send a thank-you to the donors; in home accessories stores, such alternative photo frames may be particularly addictive: it can Continue to produce a soft backlight to make the photo crystal-like... After the semiconductor technology revolution led to the microelectronics industry revolution, it will brew a new "light revolution": LED is changing the city in a quiet and silent way. And life.
Many people in the future of lighting may be unbelievable. The lighting fixtures we use today, apart from the improvement of filaments, are not fundamentally different from the Edison era. With the upgrading of the indoor and outdoor decoration industry, indoor nightlights, lawn lights of public green spaces, and building landscape lights have placed high demands on cost reduction and energy saving, and existing lighting equipment has entered a “bottleneck periodâ€.
Tsinghua Science and Technology Park Optoelectronics Co., Ltd. has the first domestic LED production line with a mass production of more than 60 lumens per watt. The company's technical staff said that as a new type of semiconductor light source, LED's most significant advantages are energy saving, environmental protection and longevity. LED energy consumption is only 10% of incandescent lamps and 50% of fluorescent lamps; it is solid-packed, has a solid structure and can last up to 100,000 hours, 10 times that of fluorescent lamps and 100 times that of incandescent lamps; it does not require glass vacuum packaging. No toxic gas and mercury pollution. Chen Lianghui, an academician of the Chinese Academy of Engineering, calculated an account: 15 years to invest 5 billion to 10 billion yuan to develop the industry, equivalent to rebuilding a "Green Three Gorges Project" with only 5% of the Three Gorges Project.
In recent years, the world's three major lighting industry giants - General Electric, Philips and Osram have set up semiconductor lighting companies, developed countries have even started national projects, hoping to seize the commanding heights of emerging industries. The US Department of Energy has set up a national research project for semiconductor lighting. It is planned that more than half of incandescent lamps and fluorescent lamps will be replaced by 2010. In 2025, the US lighting power consumption will be reduced by half compared with the current one--this must be achieved by the current $50 billion annual light source industry. To support; Japan plans to save the equivalent of one or two nuclear power plants through semiconductor lamps.
In China, the Chinese Academy of Sciences has carried out relevant research as early as the 1960s, but the pace of industrial advancement has lagged behind. The industry analysts believe that the gap between China's LED technology and the international advanced level is not large, as long as the overall promotion is appropriate, a solid-state lighting industry with core competitiveness is forming.
However, the popularity of LED lighting in the LED industry still needs a “thrilling leapâ€: its photoelectric conversion efficiency is low, but the price is high, even if developed countries still need to overcome the cost. Yu Wei, a professor at East China University of Science and Technology who specializes in LED light sources, pointed out: "The LEDs are slower in heat dissipation than other light sources, and heat transfer is three orders of magnitude lower than that of metal materials. It is currently difficult to handle square lighting, building facades, and park landscapes. Light and other glare lighting tasks. If some buildings with long history and serious style adopt LED light source, they will not only lose the original charm, but also bring new light pollution.†He pointed out that the absolute advantage of LED lighting is in the small environment. And local lighting. Therefore, when considering entering the industry, enterprises should measure their own conditions and clarify the direction of the market. There is no need for a glimpse.
1
The mechanical Buzzer uses a magnet to move a reed up and down quickly to emit a lower-pitch buzz! It's quieter than the piezoelectric buzzer but uses more power, so you the terminals will have to be closer to the battery packs. To use them, you'll need to match the wire colors to the wires from the battery pack.
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