Investigations on the Optical-Electrical-Thermal Characteristics of RGB LEDs

Srividya, R and Srinivasan, . and Netto, Winston (2021) Investigations on the Optical-Electrical-Thermal Characteristics of RGB LEDs. journal of Nano and Electronic Physics, 13 (3). 03013-1. ISSN 2077-6772

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Abstract

Heat dissipation is the main problem of concern when working with high power light emitting diodes. If not controlled, the optical and electrical performance of the luminaire can get affected. A higher junc�tion temperature induces variations in forward voltage, luminous lux, correlated color temperature, color point and peak wavelength. LED manufacturers have their operating ranges for junction temperature and driving current. Operating LEDs beyond the operating range of current may initially provide high luminous flux, but junction temperature might increase beyond the range specified, resulting in very fast degradation of luminous flux. Also, elevated junction temperatures can severely affect the lifetime and re�liability of LEDs. Hence, measurement and control of junction temperature within the maximum operat�ing range through appropriate thermal design are vital for avoiding performance degradation of the LED luminaire. This paper shows an insight on the experimentations carried out to measure the junction tem�perature and analyze its effect on the electrical and optical parameters of RGB LEDs within the maxi�mum operating temperature.

Item Type: Article
Uncontrolled Keywords: LED, Junction temperature, Heat dissipation, Forward voltage, Luminous flux.
Subjects: Engineering > MIT Manipal > Instrumentation and Control
Depositing User: MIT Library
Date Deposited: 23 Jun 2022 04:09
Last Modified: 23 Jun 2022 04:09
URI: http://eprints.manipal.edu/id/eprint/158664

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