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wqhdoidba
Wysłany: Nie 6:11, 16 Mar 2014
Temat postu:
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, up to 60° C. Since LED output and temperature, the actual operating characteristics will be presented for the manufacturer under different testing conditions.
American Gaithersburg NIST research group said, heat sink so that the LED testing method is compatible with the general lighting in. One of them is the development of the new testing process helps LED solid-state lighting industry. NIST scientists Yuqin Zong and Yoshi Ohno, measured by providing a direct measurement method with the traditional lamp similar LED brightness and color,
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graphic: the new testing instrument, it can meet the high power LED manufacturers and pan lighting industry needs, so that their access to data and the result of the comparison; operation diagram is derived from NIST Yuqin Zong.
Symposium on Advances at 2008 Expert in Photometry and Colorimetry, Ohno and Zong noted in a paper published in the ", we developed a method for new and practical, measurement of any particular junction temperature of high power LED." A new test method based on the temperature controlled heat sink, use it to adjust to any LED chip junction temperature, this method is better than the method using DC testing LED output. The heat sink is cheap,
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