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

Автор(ы) R. Srividya1, C.R. Srinivasan2 , Winston Netto2
Принадлежность

1Department of Electrical and Electronics Engineering, Manipal Academy of Higher Education, Manipal Institute of Technology, Manipal, India

2Department of Instrumentation and Control Engineering, Manipal Academy of Higher Education, Manipal Institute of Technology, Manipal, India

Е-mail cr.srinivasan@manipal.edu
Выпуск Том 13, Год 2021, Номер 3
Даты Received 10 January 2021; revised manuscript received 15 June 2021; published online 25 June 2021
Ссылка R. Srividya, C.R. Srinivasan, Winston Netto, J. Nano- Electron. Phys. 13 No 3, 03013 (2021)
DOI https://doi.org/10.21272/jnep.13(3).03013
PACS Number(s) 07.07.Hj
Ключевые слова LED (14) , Junction temperature (2) , Heat dissipation, Forward voltage, Luminous flux.
Аннотация

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 junction 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 reliability of LEDs. Hence, measurement and control of junction temperature within the maximum operating 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 temperature and analyze its effect on the electrical and optical parameters of RGB LEDs within the maximum operating temperature.

Список литературы