LED can bring the city's "bright revolution"?

From the infrared remote control to the mobile phone display, from traffic lights to household appliances display, LED (light emitting diode) is "moisten things silently" to change our city and life. Semiconductor technology, after the start of the microelectronics industry revolution, and began brewing in the world a new green bright revolution". Please pay attention --

Shanghai Oriental Pearl Tower, Wujiaochang "egg", Donghai bridge...... These are well-known buildings have a common new light source - LED. They illuminate the colorful Shanghai, in the night exudes a charming light, bright and not luxury. In August 22nd - 24, held at the fourth China International Semiconductor Lighting Exhibition, these new LED light shine.

LED, that is, light-emitting diodes, the use of solid semiconductor chips to release energy, can be issued directly red, yellow, blue, green, green, orange, purple, white and other colorful light. Small, embedded in the chip on the light-emitting body, has been used only for electronic equipment power indicator. With the increasing demand of energy saving and environmental protection, the scope of the new LED light source continues to expand, in addition to the special field of lighting, large-size LCD TV backlighting, automotive, commercial and industrial lighting has gradually become the main application field of LED.

2006, the global LED trade market more than 7 billion U.S. dollars, with an average annual growth rate of over 20%. LED is changing the pattern of the global lighting industry, no less than the Second World War after the neon lamp and other gas bulb invention of the revolutionary impact of technology.

Power consumption is the ordinary bulb 1/10

China's 1/4 lighting light into LED, a year can save the equivalent of 1 power generation of Three Gorges power station, said Li Shuzhi, director of Shanghai semiconductor lighting engineering research center. Undoubtedly, energy saving and environmental protection is the biggest breakthrough in this light source.

Experts describe the luminescence principle of "LED like thunder and lightning", the traditional light bulb is in a vacuum tube into a electrified filament, while LED is a semiconductor chip, the electronic mobile light conversion efficiency can reach 68%. In contrast, the ordinary light bulbs by the conversion of electric energy into heat energy and then converted into light energy, conversion efficiency is only 12%.

Because of this, LED has incomparable advantages of other light sources of energy saving and environmental protection. Under the same lighting effect, LED power consumption is only equivalent to the ordinary bulb 1/10. In the field of special lighting, landscape lighting (alternative neon) can save energy by 70%, traffic lights (instead of incandescent lamps) can save energy by 80%. In addition, LED service life is also 100 times longer than ordinary bulbs, light quality and stability. Because the LED is a cold light source, so less glare, no radiation, no harmful substances will be used, and waste recycling, no pollution.

Landscape lighting integration"

People who have seen the "egg" in Shanghai, Wujiaochang, will have a profound memory of its gorgeous and colorful lights at night. The picture is clear, colorful, true to life, under the control of the computer image changing. That's what LED did.

Wujiaochang "egg" lighting light source consists of 1 million 420 thousand LED light spots, if these points can be connected to even 14 km. Because the strip LED is inserted into the "egg" steel frame on the seam, and therefore did not destroy its original appearance and daytime landscape, to the evening will become a colorful stage of light. It is reported that the actual power consumption of egg light lighting is only 80.3 kilowatts / hour, the maximum peak power consumption of 7.8 watts per square meter, if the same area of non LED display, its power consumption is more than 10 times.

LED light source light, compact, can adapt to a variety of geometric sizes and different sizes. Therefore, the lamp can be designed to produce very small and beautiful, suitable for installation in any building structure without affecting the overall aesthetic appearance. According to the Yangpu District City Management Bureau deputy director Wang Weiping introduction, the LED display technology is applied to the city landscape, but also can do a "building integration", namely the LED light source can be combined with the city building perfect, do not see the light bulbs, will not only big screen flashing lights, and more buildings can also emit light charm.

LED is not only rich in color, and the response time is short, easy to control. The use of timing control circuit, can achieve a variety of color dynamic changes, instantaneous color. In addition, it also has a strong direction, no visual pollution characteristics, can use batteries, solar energy, wind energy or other energy as its power supply, so in the landscape lighting engineering favored. Is the development of the Bohai bay bridge lighting display lights, will no longer need power, cables and poles and other facilities, so that wind, solar and LED road lighting, LED landscape display as one.

LED industry development prospects

If the Shanghai landmark buildings, landscape lighting and public lighting by the semiconductor lighting to replace the traditional lighting, the city's annual lighting electricity will be able to save 1 billion kwh. "We can see that the application of LED in Shanghai will be of great potential. Shanghai has a unique advantage in the development of LED industry market and scientific research, its industrialization has begun to take shape, and in the search for a new round of breakthrough in order to seize the commanding heights of the development of this innovative industry LED. As of 2006, Shanghai has 105 LED related patents, and access to a number of scientific and Technological Achievements Award; but also developed more than 100 national standards, industry standards and internal standards of the optical industry.

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