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Street Lamp

The Current Challenges Facing LED Lamp Technology

Since 2009, "10 City 10 000" started, we triggered the frenzy of the LED lighting, LED street light technology became a hot topic, but this did not solve the LED lamp technology. LED by senior engineers and Tianjin Dongli District Government jointly organized the "theme of the Fifth China LED Industry Summit Forum" meeting, many industry experts pointed out that LED street light technology faces many challenges, Ningbo Liaoyuan technology with the total labor Hai Jun Chen to his LED lamp technology solutions.

In this forum, senior street design expert, said the Guangdong city of Chiu Shun Xu Even in this year's Guangzhou Lighting Fair, on some companies in product R & D efforts, production of products gratifying. For street design, Xu city prompted the industry to consider the wind resistance problem, "Let your lights can really stand in the rain." Now many lights did not take into account the thermal design of air convection, the heat caused no real export, reduce LED life.

At the same time promoting the city ? modular design. He believes that modular power supply not only to avoid the risk of high power, IP protection is also easy to maintain them as easy as the conventional lamp, thus greatly reducing the maintenance burden on enterprises.Chief Engineer Hai Jun Chen, Ningbo Liaoyuan technology that help increase white light LED street lamp road lighting safety. He believes that lighting is not only to consider the central vision, but also consider the ability of peripheral target detection, including the short wavelength blue light white LED street light more favorable to the human eye detect surrounding objects.

He said that "on the street, the lower the interface thermal resistance, reduce the air gap is the key," "because of the surface roughness inherent in the problem, in fact, there are fine or cavitation. As much air interface thermal resistance, not conducive to thermal diffusion, it has greatly increased the overall interface thermal resistance. "

Landscape Management Committee of Tianjin city and director of Da Qing Chen is not recommended for more than 3W high power LED light source as road lighting. Because of high power LED must be accompanied by the formation of high current, high current leading to a large heat, an increase of lumen. He told the audience that "there are several companies producing domestic high power integrated module of the luminous efficiency has been achieved 130Lm W or more, the highest close to 150Lm W, and temperature control in a 50 ?. In the second half, to 160Lm W These are indisputable. "

Huazhong University of Science Professor Luo Xiaobing said, LED device cooling problem is a systemic problem. A LED chip thermal resistance, thermal resistance interface materials, diffusion resistance, environmental resistance and so on, "We should also reduce the thermal resistance of all is the key to solving heat." He believes that through the development of multi layer ceramic technology and to achieve integrated LED package and multi purpose, LED packaging systems to reduce size, lower packaging costs are CoB major trends in technology.

Personally, I think, LED lights replace the high pressure sodium lamp, energy saving and emission reduction is a trend in the future, just a technical development and progress also need time for research. LED lights to the development of technology to progress, I think that needs attention in the following areas: improving luminous flux, make things right for the second optical, thermal solution, modular. Only do every step, and out of the product to the high reliability and quality.

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