LED lights industry need pay attention to develop the measurement standards
LED light-emitting surface is small, narrow beam, he characteristics of high brightness decided the particularity of detection.In order to deal with this problem, CIE set up seperately the "TC2-45 LED measurement and TC2-46CIE/ISO LED strength measure standards " two technical committees. CIETC2-34 team held a meeting in Vienna, headquarters in October 1997, develop and recommend CIE127-1997 LED measurement standards, it involves LED radiometric, photometric and colorimetric measurement. But because the rapid development of LED technology in recent years, especially the white LED lighting products, a lot of problems are not taken into account in the past. Therefore, the CIE at the annual meeting held in Kyoto, Japan, in 1999, proposed by the participants on behalf of the developed countries, to develop the white LED lighting equipment standards by CIETC2-34.The Japanese delegation also submitted two draft standards of general lighting with white LED.
In order to develop LED lighting products, developed countries have attached great importance to the study of LED spot test methods and standards. Such as theU.S. National Institute of standard tests (NIST),organizations the
international renowned testing experts to carry out the LED test, focus on studying the LED light emitting characteristics, temperature characteristics and lumen characteristics etc.test methods,and trying to establish a LED test methods of comprehensive set and technical standards. It has been walking in the forefront of the world in the aspect of LED test. Japan set up a "white LED Test Research Council, specializing in study of lighting white LED test methods and technical standards. In order to seize the developed countries in the world of high ground of the LED flood lights research, have invested a lot of manpower and resources in the LED standards and testing , the s focus on selection the parameters and testing methods of the led characteristics in the standard.
In China, there is no corresponding national standards about the semiconductor light-emitting diode test method , so often generated much controversy between different manufacturers and users . In recent years, the professional branch of the Optical Society of optoelectronic devices in succession organized academic discussions and exchanges of a number of semiconductor light-emitting diode test method,person in the industry form gradually more unified understanding, and develop a unified industry standard SJ/T2355-2005 semiconductor light-emitting diode test method, the exchange of products in the industry, played an important role in the comparison.