When the night of Shencheng comes, a beautiful "landscape light show" will be staged at the Shanghai World Expo: the east and west facades of the Expo theme pavilion will shine with the stars and the outer walls of the Expo Center will give a quiet and elegant appearance. The white light and the Expo Sunshine Valley incarnation movie screens project brilliant and dazzling patterns. The Chinese pavilion, cultural center and oil pavilion are dazzling in the shadow of the LED light source...
This "light show" is not only a visual feast, but also a feast of science and technology. As the world's recognized fourth-generation lighting technology, the "solid-state lighting" technology using light-emitting diodes (LED) has been fully demonstrated in the Shanghai World Expo. According to the reporter's understanding, the total amount of LED chips used in the Shanghai World Expo Park is more than 1.003 billion pieces, of which 80% of the night scene lighting in the park uses LED technology, and the Expo Park has become the world's largest LED demonstration area.
The reason why the Shanghai World Expo is so "love" LED, and the forward-looking nature of LED technology is inseparable. In an interview with reporters, Guo Yansheng, director of the Shanghai Municipal Science and Technology Commission's High-tech Department and director of the Semiconductor Lighting Engineering Technology Research Center, said that compared with traditional light sources, LED technology has two significant advantages: energy saving, environmental protection and controllability. In terms of energy saving and environmental protection, LED technology is 60% to 80% more energy efficient than traditional light sources. At the same time, the LED light source can form a combination of different light colors under computer control to achieve a colorful dynamic change effect. It is this characteristic that allows Expo visitors to see the changing lighting effects in the Sunshine Pavilion, Cultural Center, etc.
Looking back at history, every leap in human lighting technology has left a footprint in the history of the Expo. At the 1873 Vienna World Expo, the invention of electric motors ushered in the era of electrification. At the Paris World Expo in 1878, the incandescent bulbs invented by Edison were installed on the Eiffel Tower, shining the entire Expo Park. In 1939, the New York and Los Angeles World Expo demonstrated the first practical fluorescent light. “The Shanghai World Expo may become the first year of human solid-state lighting,†said Wang Gang, general manager of Shanghai Guanglian Lighting Co., Ltd., whose company provides a large number of LED lamps for Shanghai Expo lighting.
The large-scale application of LED technology in the Expo Park indicates that this technology is not far from people's lives. Guo Yansheng said that the Ministry of Science and Technology of China launched the “Ten Cities and Ten Thousand Miles†program in 2004 to promote LED lighting in 21 cities in China. At present, Shanghai's municipal construction lighting has used LED technology extensively. “The government is taking a number of measures to reduce the cost of LED luminaires,†he said. “I believe that LEDs can reach thousands of households within three to five years.â€
In terms of scale, China is already a big LED industry country, but there is still a gap between China and international advanced technology in the technical field. It is reported that most of the Expo LED lighting fixtures have been localized, but most of the LED chips use imported chips. Lu Wei, a researcher at the Shanghai Institute of Technical Physics of the Chinese Academy of Sciences, pointed out that the inconsistency of industry standards is a bottleneck restricting the strength of China's LED industry. He said that he hopes to further promote the development of the LED industry through the platform of the Shanghai World Expo.
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