Tong Tongsheng: Development of international standards and detection technologies for LED light radiation safety

Professor Tong Tongsheng, Professor of Optoelectronic Engineering Department of Zhejiang University and Chairman of Hangzhou Zheda Tricolor Instrument Co., Ltd., made an international standard and testing technology for LED light radiation safety in the “International SSL Standards and Testing Lecture” held on October 14, 2009. The report of Development, Tong Tongsheng pointed out in the report that the rapid development of high-efficiency power LEDs has promoted the promotion of LEDs in various fields, especially in general lighting applications. However, the widespread use of high-brightness LEDs has become a growing concern for potential photobioradiation safety issues. In particular, gallium nitride blue LEDs and white LEDs coated with phosphors, blue light radiation on the human eye retina potential damage has become a safety indicator for LED products to enter the market. A revised version of the IEC 62471 international standard is nearing completion, and guidance documents for LED manufacturers are being developed. In recent years, China has done a lot of work in the formulation of international standards for optical radiation safety, testing technology and related equipment research, and has played an important role in the international arena.

Yan Tongsheng said that in recent years, China has made great progress in the research and evaluation of optical radiation safety. LED optical radiation safety measurement technology and instruments have been in the international leading position. However, the biological data of optical radiation hazards in current international standards are mainly based on the research results of developed countries in Europe and America. China's research in the field of optical radiation safety is still relatively weak.

At present, China Electronics Industry Standardization Research Institute, National Semiconductor Lighting LED Application Product Testing Center, National Lighting Product Quality Testing Center (Zhongshan), Hangzhou Quality Inspection Institute and Shenzhen Building Science Research Institute have all established IEC62471 international standards. LED Light Radiation Safety Testing Laboratory.

Tong Tongsheng believes that with the continuous improvement of the international IEC optical radiation safety series standards and the formulation of China's national standards, the national quality inspection agencies have systematically carried out compulsory certification of products, and LED light radiation products will have safety guarantees.