Chen Dahua: rational call for the healthy development of LED

Fudan University professor (Bo Dao), deputy director of the Shanghai Institute of lighting and lighting Chinese association deputy secretary general, international visual working committee member Chen Dahua do "explore" white LED applications in the field of commercial lighting theme report.

Present situation of white light LED Technology

Mr. Chen Dahua first introduced 15 advantages: energy saving, environmental protection, LED security, long life, low consumption, low heat, light, white light, high brightness, waterproof, shockproof, miniature, adjustable light beam, convenient maintenance. Secondly, Mr. Chen Dahua on the international high-power LED light source products were compared, and listed in recent years, China's LED sales trend chart.

Application of white LED in lighting industry

Then, Mr. Chen Dahua: the opening ceremony of the Beijing Olympic Games, the Shanghai Oriental Pearl and a series of pictures, lists the application of LED lighting industry, including road lighting, office lighting, advertising lighting, waiting room lighting, automotive lighting etc..

Rational call in the application of white LED

Rational call white LED application is the core of this seminar, Mr. Chen Dahua will be divided into three parts to explain:

Part 1: Mr. Chen Dahua, to call, rational in white LED application must first, rational learning and understanding of the LED luminous principle, in the full advantages and disadvantages, based on the price and use requirements, establish regulations and standards gradually extended. Secondly, the development of China's LED industry with high-tech chip technology and independent intellectual property rights as the core. Finally, a comprehensive focus on the dynamics of SSL, especially the rise of OLED. The second part: in the application of LED, Mr. Chen Dahua think we should pay attention to the following problems: understanding the luminescence principle of LED light source; the principle of white LED light source; pay attention to the electrical properties of LED; understand the I-V characteristics of the LED light source; the importance of controlling the working current of LED; to understand the principle of LED dimming or adjusting the pulse current regulation width to achieve dimming LED will change color, but useful life of LED; LED should be driven by DC voltage and constant current; understand the thermal performance of LED heat dissipation; the importance of LED; to understand the characteristics of LED light source; waterproof measures use a lot of LED lighting device high current circuit node lifetime and the difficulty; the flux of LED to maintain the level of; the optical design of the LED light source; dispel some misunderstanding on LED; to explore and establish new standards for indoor and outdoor lighting project for LED light source and the corresponding test techniques and standards; familiar with the main LED Technical indicators.

Third part: the analysis of the LED as street lights and tunnel lights, Mr. Chen Dahua think so: first, the advantages of LED for street lights and tunnel lights reform brought light and hope, the enormous economic and social benefits is not attractive to fight! Second, but there are still some difficulties in the maintenance in particular, the driving circuit is not consistent; at the same time high power LED cooling system is not perfect so that the attenuation of LED lamp, life is not the lack of appropriate standards; excellent light distribution performance of lamps, light can not meet the road and tunnel lighting standards; and the price is significantly higher, but also restricts the popularization and application of it.

How in the application of white LED rational call? Mr. Chen Dahua summed up two points: first, our country functions have for health promotion and application of LED products in a timely manner to make market survey, to the enterprise non standardized advertising and misleading customers to be banned, and to organize the relevant experts to formulate standards as soon as possible. Second, the experience of advanced countries in the world is worth learning from, such as the United States Department of energy (DOE) in recent years. Third, attention should be paid to LED (LightEmittingDiode) is a solid light source SSL (SolidStatELighting), in particular, to pay attention to OLED.

Bright future development of white LED

According to Mr. Chen Dahua introduced, LED has now established a number of industrial base. Coupled with the new increase in Yangzhou LED industrial base, the country has seven or eight LED industrial base. Countries are trying to find ways to fight for the country's resources, so each base has its own characteristics.

Mr. Chen Dahua, the light of dawn is the country together, like Aladdin lighting network, the rational call for LED, let LED go on the road of healthy development. With the improvement of the efficiency of LED, as well as the annual decline in the cost of LED, LED as green lighting will bring new vitality.