Semiconductor lighting is one of the hot industries that rise at the beginning of this century and catch the global interest and high attention from many countries. LED lighting is the core of semiconductor devices, because its PN junction gives out light, and has the characteristics of high brightness, high photosynthetic efficiency, long life, environmental protection and many other advantages, its application in recent years has got fast development. Especially in 1993, after Japan Nakamura successfully developed the GaN blu-ray LED luminescent device, the white LED technology and industry have got fast development based on the blue chip. Meanwhile, the damage of the blue light radiation of high brightness to the human eye retina also has caused the global concern, the emission spectrum of the GaN and LED blue light is in the spectrum sensitive position of the photochemical damage of the human eye retina. Based on international animal experiment and the human eye retina, the cultivating experiment of histocyte has got a lot of scientific data. In July of this year the 27th South Africa international lighting committee CIE congress, Mou Tongsheng, the president of Sensing Instrument Co, Ltd says, at the present time, the biological radiation hazards level of a few LED products can achieved, “the second level” RG2 (note 1). That is, when the eyes watch LED with the high brightness for hundreds of seconds, it may cause permanent photochemical retinal damage to the human eyes.
Internationally, in 2006, the European Commission issued a directive no. 25, which made the requirements of the safety and health for the dangers that exposed in the artificial optical radiation. At present, the European Union has listed the light biological radiation safety of LED products as an important requirement for the product safety CE certification. British, German and other nations have made corresponding mandatory safety standards for LED products. Last year, the French food, environment and occupational safety and health bureau issued the relevant documents, requiring that the LED lighting system should consider light health problems. TheUnited Stateshas set the relevant standards, and the United States LED product safety certification UL standard also began to establish the corresponding market access requirements.
International lighting product standardization committee IEC T34 has set up the biological safety requirements for the safety norms of the products such as the LED module, LED ballast lamp, the LED lights, LED lights. International ray radiation safety standardization committee IEC TC76 is working to establish a series of light biological radiation safety standards (IEC62471). Among them, the basic standard of the light biological radiation safety and the requirements guide of the manufacturer have been released. The light biological safety standardization of LED products is the most important work of IEC TC76 / WG9 at present.
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