Research Control Devices for LED Light Sources under Their Operating Conditions at Elevated Temperatures

Autor:	Iryna Beliakova, Vadim Piscio, Pavlo Maruschak, Oleksandr Shovkun, Volodymyr Medvid, Roman Mykhailyshyn
Jazyk:	angličtina
Rok vydání:	2023
Předmět:	LED light source LED voltage LED current illuminance relative change of luminous flux LED matrix Technology Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Zdroj:	Applied Sciences, Vol 13, Iss 12, p 7247 (2023)
Druh dokumentu:	article
ISSN:	2076-3417 88330605
DOI:	10.3390/app13127247
Popis:	The electrical and light characteristics of light-emitting diodes (LEDs), upon which modern lighting devices are constructed, are significantly influenced by ambient temperature. As the temperature rises, the luminous flux of LEDs diminishes, and the lifespan of LED devices also decreases. The control devices (drivers) used in LED lighting systems, built based on current stabilization schemes, do not effectively stabilize the luminous flux when the ambient temperature fluctuates between +15 to +60 °C. The luminous flux declines as the temperature increases, even if the current supplied to the LEDs remains constant. This paper presents a comparative analysis of LED lighting devices equipped with drivers featuring current stabilization and those with drivers employing voltage stabilization for operation in higher temperature conditions.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/88330605e9d74df9bc14a03941b7284b Zobrazit plný text záznamu View record in DOAJ