Development and analysis of a modular LED array light source

Mitterhofer, Stefan (avtor), Korošak, Žiga (avtor), Rojec, Žiga (avtor), Jankovec, Marko (avtor), Topič, Marko (avtor)

Light emitting diodes (LEDs) have experienced rapid technological development in the past decade, making them a winning alternative to conventional light sources in many applications. LED arrays allow precise control of the desired irradiance profile in a target area by adjusting the position and output power of individual LEDs. However, despite increased efficiency, many LEDs still transform a large proportion of the input electrical power into heat, requiring an efficient cooling system. This paper presents a modular LED array light source mounted on a water-cooled aluminum plate. Novel electronic LED driver modules, connected via a serial communication bus in a daisy-chain topology, were developed with the ability to set the operating current of individual LEDs. A modular layout of cooling and mounting system and LED driver modules, as well as a specialized design for the LED soldering footprint, was able to house a variety of common commercial LEDs, enabling easy adjustment of the lighting system to the required application and size of the irradiated area. In a prototype of one plate containing 10 LEDs, individual LED radiance was optimized for a better irradiance homogeneity in the target area. Array characterization showed a low standard deviation of the irradiance of 1.8% and a good fit between measured and calculated irradiance. A test of the array at elevated temperatures showed moderate LED radiance degradation and a wavelength shift of the measured spectra after extended use.

• Jezik: Angleški jezik
• Ključne besede: LED, light sources, light emitting diode, lighting system, irradiance optimization, degradation
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: 16 str.
• Številčenje: Vol. 7, iss. 4, art. 92
• PID: 20.500.12556/RUL-134463
• UDK: 621.383.51
• ISSN pri članku: 2304-6732
• DOI: 10.3390/photonics7040092
• COBISS.SI-ID: 42913027
• Datum objave v RUL: 17.01.2022

Gradivo je del revije

• Naslov: Photonics
• Skrajšan naslov: Photonics
• Založnik: MDPI AG
• ISSN: 2304-6732
• COBISS.SI-ID: 523331609

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 01.12.2020

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: LED, svetlobni viri

Projekti

• Financer: EC - European Commission
• Program financ.: H2020
• Številka projekta: 721452
• Naslov: Photovoltaic module life time forecast and evaluation
• Akronim: SOLAR-TRAIN

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0197
• Naslov: Fotovoltaika in elektronika