Expo innovation and technology highlights when LED lighting your home

As one of the Shanghai World Expo innovation highlights, LED lighting technology has been widely used in the Expo site, especially in the night, LED lighting the Expo Park dressed Ambilight, magnificent and impressive. LED lighting technology in the end what magic? Ordinary people's homes can be used as soon as possible on the LED lighting? What are the barriers to the commercialization of LED lighting?

The first year of semiconductor lighting"

World Expo has always played an important role in the history of lighting technology. Paris, 1878, Edison, World Expo, the invention of the incandescent lamp made of tungsten filament, ushered in the era of incandescent lamps. In 1939, New York and Losangeles in World Expo, the first practical fluorescent display. Since then, fluorescent lamps have been widely used.

Fudan University professor Fang Zhilie participated in the research work of LED lighting in Shanghai, World Expo. In his view, the Shanghai Expo LED lighting application shows that Shanghai, World Expo is likely to open a semiconductor lighting first year".

According to statistics, at present in the Expo site uses 1 billion 30 million LED chip, LED chip in the Expo Park in the indoor and outdoor lighting, landscape decoration, signage and display information for the entire park, become the world's most concentrated semiconductor lighting technology demonstration area. One of the Expo venues indoor lighting light source of about 80% using the LED green light source, compared to ordinary incandescent power up to about 90%.

Shanghai, World Expo, through the interpretation of creative design and technical concepts, LED lighting gives visitors an unprecedented visual experience. Such as the Holland Museum of "Happy Street" LED decoration in the construction of the surface, through the bright flashing visual effects to express joy Holland Pavilion decorated in the night. The red light of the red light on the exterior wall of the Chinese Pavilion is strengthened, and the lights of the fairy tale of the Danish pavilion are widely used in LED lamps.

In fact, the 2008 Olympic Games, LED lamps in the water cube and the bird's nest and other venues are a lot of use. "Fang Zhilie said," and is widely used on World Expo, meaning more unusual, because of its high-tech demonstration significance, will promote public consumption rise, driven production manufacturers rise, promote the development of scientific research team. "

Energy saving and environmental friendly green light source LED

Why LED lighting will become the future development trend of lighting technology? This lighting technology compared to the past lamps have what kind of advantage?

Fang Zhilie said, LED lighting is a popular point of light emitting diode lighting, is a semiconductor solid-state light-emitting devices. It is used as luminescent materials using solid semiconductor chip, the electric energy through the light emitting diode, the semiconductor light-emitting materials, photon emission caused a special physical change, resulting in the illumination light. Compared with the traditional incandescent lamp and fluorescent lamp, this kind of illumination has incomparable advantages.

Fang Zhilie to reporters to see a set of data: since 1962, the origin of semiconductor light-emitting technology so far, the same power consumption, LED lamps and lanterns are 15 times the total amount of incandescent lamp, fluorescent lamp is 2 times. And with the continuous improvement of technology, there is still much room for improvement in luminous efficiency, while the growth of incandescent and fluorescent lamps is very limited.

More importantly, LED lighting successfully solved the problem of mercury pollution. Fang Zhilie said, whether it is energy saving lamp, fluorescent lamp, electrodeless lamp, halogen lamp, high-pressure sodium lamp, the lamp will be placed in a certain amount of mercury in power under the lamp will produce ultraviolet mercury vapor, so as to stimulate phosphor. However, the waste lamps often release mercury, causing environmental pollution. The LED light-emitting diodes but not mercury. In his view, LED lighting is an energy-saving and clean light source, large-scale applications in line with the concept of low-carbon development of human society.

Reporters learned that, from the Ministry of science and technology, the Ministry of finance to start the Ten City million plan to Guangdong, Trinidad and thousands of high-power LED street lamp industrialization demonstration project, LED is showing its vitality.

Multiple factors hinder LED for home lighting

Optimistic about the prospects for the development of the industry at the same time, the majority of consumers are concerned about when their homes can also be used on LED lighting LED".

In this regard, the national electric light source quality supervision and Inspection Center (Shanghai) deputy director Lu Rongshu believes that the current application of LED in outdoor lighting engineering has been very popular, but in the application of indoor lighting engineering is at the preliminary stage. He admitted that LED as a light source for lighting lamps into ordinary people's home, there are still immature technology and high prices and other issues. Technically, there are still some problems such as low efficiency, long service life, and poor lighting quality in LED lighting.

"Although LED lamps can achieve high illumination, low energy consumption, but this does not mean that the efficiency of the LED lamp light is high, because of its overall lighting quality is not high. "Lu Rongshu said," to the lamp as an example, if the LED light source may be 3 watts - 5 Watt lighting can also (more than ten watt energy-saving lamps, very low energy saving). However, such a table lamp can only guarantee a very high vertical illumination, which means that the light source is very concentrated, the angle of light is very small, the result is that the uniformity of light, radius and scope are limited. "

In this regard, he explained that the formation of more than 3 watts of high-power light-emitting diode light-emitting efficiency is low, less than the luminous efficiency of each