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|Author(s):||Yuqin Zong; Yoshihiro Ohno; Pei-ting Chou;|
|Title:||PRACTICAL METHOD FOR MEASUREMENT OF AC-DRIVEN HIGH-POWER LEDS|
|Published:||July 14, 2008|
|Abstract:||Alternating-current (AC) driven high-power LEDs are available and used in SSL products. AC LEDs operate directly from a mains supply and thus have advantages in simplifying product design, increasing product reliability, and extending product lifetime. Accurate measurement of AC high-power LEDs is required for quality control and product qualifications such as US Energy Stars. We have developed a simple, robust method for measurement of high-power LEDs at any specified junction temperature under a normal AC operating condition. In addition to optical quantities, the measurement of an AC LED also determines the thermal resistance between the LED junction and the heat sink.|
|Proceedings:||CIE Midterm Meeting and the Light and Lighting Conference|
|Dates:||May 27-29, 2009|
|Keywords:||AC LED, High-Power LED, Junction temperature, Measurement method|
|PDF version:||Click here to retrieve PDF version of paper (619KB)|