Temperature measurements of high power LEDs

Niculina Badalan (Draghici); Paul Svasta; Andrei Drumea

doi:10.1117/12.2245729

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14 December 2016 Temperature measurements of high power LEDs

Niculina Badalan (Draghici), Paul Svasta, Andrei Drumea

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Proceedings Volume 10010, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VIII; 1001019 (2016) https://doi.org/10.1117/12.2245729
Event: Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies 2016, 2016, Constanta, Romania

Abstract

Measurement of a LED junction temperature is very important in designing a LED lighting system. Depending on the junction temperature we will be able to determine the type of cooling system and the size of the lighting system. There are several indirect methods for junction temperature measurement. The method used in this paper is based on the thermal resistance model. The aim of this study is to identify the best device that would allow measuring the solder point temperature and the temperature on the lens of power LEDs. For this purpose four devices for measuring temperature on a high-power LED are presented and compared according to the acquired measurements: an infrared thermal camera from FLIR Systems, a multimeter with K type thermocouple (Velleman DVM4200), an infrared-spot based noncontact thermometer (Raynger ST) and a measurement system based on a digital temperature sensor (DS1821 type) connected to a PC. The measurements were conducted on an 18W COB (chip-on-board) LED. The measurement points are the supply terminals and the lens of the LED.

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Niculina Badalan (Draghici), Paul Svasta, and Andrei Drumea "Temperature measurements of high power LEDs", Proc. SPIE 10010, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VIII, 1001019 (14 December 2016); https://doi.org/10.1117/12.2245729

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