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Publication Citation: PRACTICAL METHOD FOR MEASUREMENT OF AC-DRIVEN HIGH-POWER LEDS

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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
Pages: 5 pp.
Location: Budapest, -1
Dates: May 27-29, 2009
Keywords: AC LED; High-Power LED; Junction temperature; Measurement method
Research Areas: Photometry
PDF version: PDF Document Click here to retrieve PDF version of paper (619KB)