LED brings the city "bright revolution"

"LED" is not a new term, but it was a little far from everyday life. It is a light emitting diode physics simple "(L igh tin g Em ittin g D IOD E)", released by solid energy semiconductor chip, can directly emit red, yellow, blue, green, orange, purple, white and colorful light. But today, in the streets and lanes, public welfare donation box this may have attracted you love: it can broadcast public service ads, and send thanked language to donors; in the Home Furnishing jewelry store, this photo offbeat may be especially attractive: it can continue to play back the soft light, make the photo like crystal...... Semiconductor technology following the initiation of the microelectronics industry revolution, but also brewing a new "bright revolution":LED is "moisten things silently" to change our city and life. Many people may be hard to believe in the future of lighting in the future, today we use lighting lamps in addition to the improvement of the filament, there is no essential difference with the Edison era. With indoor and outdoor decoration industry upgrade, the night light, indoor public green lawn lamp, landscape lamp and other buildings to reduce the cost and energy saving put forward very high requirements, the existing lighting equipment has entered a bottleneck period". Tsinghua Science Park Electronic Co. Ltd has the first domestic production of more than 60 lumens per watt LED production line, the company's technical staff said that as a new semiconductor light source, LED is the most obvious advantage of energy saving and environmental protection and longevity. LED energy consumption is only 10% of incandescent lamp, fluorescent lamp 50%; it uses solid package, firm structure, service life can reach 100 thousand hours, is 10 times of the fluorescent lamp, incandescent lamp 100 times; it does not require the use of glass vacuum packaging, no toxic gas and mercury pollution. Chinese Academy of Engineering Chen Lianghui counted a bill: 15 years, investment of $5 billion to $10 billion to develop the industry, equivalent to only three of the Three Gorges project investment to rebuild a green Three Gorges project". In recent years, the world's three largest lighting industry giant - Ge, PHILPS and Rahm, have set up the semiconductor lighting company, developed countries have started the national project, hoping to seize the commanding heights of new industries. The United States Department of energy has established the national semiconductor lighting project, plans to 2010, more than half of the incandescent lamp fluorescent lamp was replaced in 2025, the United States lighting electricity than the half - this must be light industry then $50 billion a year to support; Japan plans through the semiconductor lamp, saving power output equivalent to one or two nuclear power plant. In China, the Chinese Academy of Sciences as early as the 60s of last century has been carried out related research, but the pace of industrial development is seriously lagging behind. Industry insiders believe that China's current LED technology and the international advanced level gap is not large, as long as the overall advance properly, a core competitiveness of the solid-state lighting industry is forming in sight. However, the popularity of LED industry from civilian lighting still need thrilling leap: it's photoelectric conversion efficiency is low, the price is high, even if the developed countries still need to overcome the cost mark. Yu Wei, a East China University of Science and Technology professor who specializes in the LED source said: compared to other light sources, LED slow cooling, heat transfer is 3 orders of magnitude lower than that of the metal material, it is difficult to do, the exterior wall of the building and the park plaza lighting landscape lighting lighting task. And some of the long history, the style of the solemn building if all use LED light source, not only lose the original flavor, but also may bring new light pollution. He pointed out that the absolute advantage of LED lighting in the small environment and local lighting. So consider entering the enterprise in the industry, should measure their own conditions and clear the direction of the market, there is no need to rush. Compared with traditional media such as radio, television, newspapers and so on, the unique advantages of outdoor media, such as high arrival rate and low cost, are becoming more and more obvious. In addition to paying attention to the outdoor advertising can attract the attention, but also pay more attention to whether it can reflect the professional quality, thereby enhancing the brand value. Therefore, the traditional form of outdoor media such as road signs, light boxes, neon lights and other single, static has been unable to meet the customers and the needs of the audience, the set of technology and media two with a large LED screen began to receive the attention of the industry. After the last 10 years of the development of the last century, the LED display screen is not only high brightness, contrast, color, and can dynamically display pictures and text. It is active light, high resolution remote, even a hundred meters away with the visual effect is not the same as watching TV at home, especially for crowded public places and traffic arteries. According to experts predict that in the next few years, the global demand for various types of LED display will reach billions of dollars per year, but also increasing year by year. In China, according to the national optical photonics industry association LED display branch statistics, the current LED display industry sales of about 4 billion yuan. With the 2008 Olympic Games in Beijing and Shanghai in World Expo in the near future, as well as the country's unprecedented emphasis on environmental issues, all kinds of positive factors will stimulate LED outdoor advertising into a significant growth period of. Recently, the domestic well-known advertising company Focus Media, Oriental Pearl movement, etc. have entered the outdoor LED market is a proof. The industry generally believes that the technological level of China's LED display industry is relatively advanced, but the technology level is relatively backward, in terms of product standardization, the overall system design, reliability, testing means obviously inferior to the international advanced