Compared with the noisy daytime, the Shanghai World Expo Park at night shows a far-sighted and beautiful look. And this comes from a small LED (light-emitting diode). Not only the landscape lighting of the Axis and Four Pavilions and the Urban Best Practices District is fully LED-based, but also LED displays worth more than one billion yuan to display rich video content.
In addition to the One Axis and Four Pavilions and the Urban Best Practices Area, the square lighting, the riverside landscape belt, the signage and intelligent guidance system of the Shanghai World Expo Park, and some indoor and outdoor lighting systems also use semiconductor LED lighting technology. At the same time, night lighting as an important part of the visit also uses a variety of new energy-saving lighting tools.
This is the first time that LED lighting has been used in large scale in Chinese urban neighborhoods. Zhou Minhao, deputy director of the Shanghai Municipal Commission for Economic and Information Technology, said that more than 2 million LEDs were used on the one-kilometer Expo Axis, and 1.03 billion LED chips were used in the Expo site. There are about 80 indoor lighting sources in the Expo site. % uses LED green light source, which saves about 90% compared with ordinary incandescent lamps.
The 2010 Shanghai World Expo is becoming the largest LED show in the world, and the Expo Park is becoming the world's largest LED demonstration area. Such large-scale centralized demonstration also shows that China has become the country with the largest LED output and the largest market.
There is still no right to speak in the upstream link
The LED is red at first, followed by yellow and green. But it was used for signal indications until the 1990s when the blue LED was born. By using a combination of a phosphor and a blue LED, white light can be easily obtained, which brings the LED on the road of illumination.
In China, the Shanghai World Expo is not the first time that LEDs have shown their swaying appearance on a large scale. As early as the 2008 Beijing Olympic Games, the successful application of high-brightness and high-power LEDs made the wonderful opening ceremony the biggest LED lighting show at that time. After a year and a half, LED once again exerted its fists at the Shanghai World Expo, and once again created a scene that shocked the world with its huge visual impact.
In terms of manufacturing technology, the LED lighting product itself is much more complicated than the traditional lighting fixture. It covers many industries such as semiconductor, lamp structure and heat dissipation material, and is a cross-industry product. Zheng Haowen, director of the National High-Tech Enterprise Development LED Professional Committee, told reporters that the LED industry chain is long, from the upstream substrate materials, epitaxy, chips to device packaging and applications, covering the semiconductor industry and the lighting industry, which is a cross-integration industry of various disciplines. .
From the perspective of the domestic LED industry layout, the development of China's LED industry is extremely uneven. According to the statistics of the National Development and Reform Commission, the total output value of China's semiconductor lighting in 2008 was nearly 70 billion yuan, of which the output value of the chip was 1.9 billion yuan, the package was 18.5 billion yuan, the output value of applied products was 45 billion yuan, and the ratio of chip, package and application value was 1:9. : 22.
In other words, behind the hot investment in the LED industry, there is a flaw that has to be faced. Domestic LED companies lack the right to speak in key upstream segments such as epitaxial wafers and chips.
Data from the China Lighting Association show that in the LED industry chain, epitaxial wafers and chips account for 70% of profits, while LED packaging and applications account for only about 30% of profits. At present, the production of epitaxial wafers is still completely controlled by foreign companies, and no domestic enterprise can achieve mass production of epitaxial wafers. On the chip side, domestic enterprises are mainly concentrated in the low-end, low-end areas. In the high-power high-end field, there are still problems in technology, mass production, and quality.
Used for lighting
At present, LEDs, especially white LEDs, are developing very fast, and the light efficiency has surpassed some existing light sources, such as incandescent lamps and fluorescent lamps. LEDs are also making rapid progress in landscape lighting and road lighting, thanks to advances in technology and the declining LED prices. With the continuous deepening of the concept of global energy conservation and emission reduction, LED will play an increasingly important role in energy conservation and environmental protection.
Experts from the China Lighting Association pointed out that there is a significant difference between the development of China's LED industry and foreign countries. China is more focused on outdoor LED lamps. The best and most successful is landscape lighting, while foreign countries are more focused on indoor lighting. .
According to reports, compared to indoor LED lamps, the use environment of outdoor LED lamps is actually more challenging. Because the outdoor temperature is higher, the sun is stronger, the power is higher. The higher the temperature of the LED lamps, the lower the light efficiency, so there will be more problems in the outdoor, and the outdoor natural climate change also has a considerable degree of damage threat to the high precision LED lamp accessories.
Lu Rongshu, deputy director of the National Electric Light Source Quality Supervision and Inspection Center (Shanghai), believes that whether it is the Beijing Olympics or the Shanghai World Expo, the application of LED is as a display rather than an illumination. The former is the human eye, that is, people look at it (LED), The latter is that it (LED) looks at people, that is, as a illuminating object. As a display, LED is very successful because it has a great advantage: it can be dynamic. Therefore, it has replaced the neon light very well and has become the best and most successful landscape lighting fixture.
Lu Rongshu believes that when LED is used as a light source for lighting fixtures, there are three problems: light utilization efficiency, color and service life (light attenuation), and illumination quality (including glare). Although LED luminaires can achieve high illumination and low energy consumption, this does not mean that the efficiency of LED luminaires is high because the overall illumination quality is not high.
Taking the desk lamp as an example, if an LED light source is used, it is possible to achieve 3 watts or 5 watts (less than a dozen watts of energy-saving lamps), which is very energy-saving. However, such a desk lamp can only ensure that the vertical illumination is very high, that is to say, the light source is concentrated and the angle of illumination is small, and as a result, the uniformity, radius and range of the light are limited.
In addition, the glare of LED lamps is too strong, and only a part of them are seen in the eyes at a distance, causing the color of the light to be too glaring. At the same time, although the life of the LED is very long, it is at a low temperature, once it is made into a lighting fixture, the life will drop sharply in a high temperature and closed environment.
Experts from the China Lighting Association also believe that LED street lighting has life problems, but in terms of indoor lighting, LED lamps worldwide are quite mature.
Urgently aiming at high end
From the traditional lighting industry to LED lamps and lanterns to home appliances and other non-lighting industry enterprises to enter the LED field, from the Ministry of Science and Technology, the Ministry of Finance launched the Ten City Wanhao plan to Guangdong Province, thousands of miles of high-power LED street lamp industrialization demonstration and promotion project LED is showing its vitality, and the industry is also very optimistic about the development prospects of LED.
Due to the advantages of LED energy saving and emission reduction, the market demand is huge under a series of policy escorts. Insiders pointed out that the driving force for the development of the LED industry comes from three aspects: outdoor lighting, display and automotive lighting.
Global LED leading companies are scrambling to enter the Chinese market. This year China will become the main battlefield for global LED manufacturing. Zheng Haowen said that the development prospects of the LED industry are very good, and will exceed 300 billion yuan in output value in the next five years and is expected to eventually form a trillion scale.
At present, an important issue in the development of China's LED industry is that the scale of industrial competition is too small, resulting in high cost and high prices, so it is necessary to expand the scale. At the same time, China's LED manufacturing equipment is mainly in the low-end field, and the high-end field relies on imports, which cannot meet the needs of industrial development. Therefore, the entire industry needs to work together to promote it. In addition, China urgently needs to formulate a sound industrial standard system to provide a strong impetus for the development of the industry. Zheng Haowen said.
Energy 8000,Energy Vape Pen,Energy 8000 Disposable,Energy 8000 Puff Disposable Vape
Shenzhen Zpal Technology Co.,Ltd , https://www.zpalvapes.com