Operation of Electronic Devices for Controlling Led Light Sources When the Environment Temperature Changes

Ambient temperature significantly affects the electrical and light parameters of LEDs, such as forward and reverse current, voltage drop LEDs and luminous flux. With an increase in temperature, the decrease in the intensity of LED radiation is explained by physical processes, including the phenomena...

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Bibliographic Details
Published in:Applied system innovation 2023-06, Vol.6 (3), p.57
Main Authors: Belyakova, Iryna, Piscio, Vadim, Maruschak, Pavlo, Shovkun, Oleksandr, Medvid, Volodymyr, Markovych, Mariya
Format: Article
Language:English
Subjects:
Ambient temperature
Barrier layers
Circuits
driver schemes
experimental characteristics
Heterostructures
High temperature
Investigations
Lamps
LED lamp
LED spotlight
Light emitting diodes
Light sources
Lighting
Outdoors
Parameters
Power
Radiation
Radiative recombination
Stabilization
Temperature
temperature dependence of LED parameters
Temperature effects
Voltage drop
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Summary:Ambient temperature significantly affects the electrical and light parameters of LEDs, such as forward and reverse current, voltage drop LEDs and luminous flux. With an increase in temperature, the decrease in the intensity of LED radiation is explained by physical processes, including the phenomena of non-radiative recombination due to impurity levels, recombination on the surface, losses carriers in the barrier layers of heterostructures, etc. The increase in temperature is also significantly reduces the useful life of LEDs and the LED device in general. Drivers, which allows to stabilize the operating current with a change in the supply voltage of the device and, as the result is light flux. But in LEDs of various types, current stabilization does not lead to the stabilization of the light flux when the temperature regime of their operation changes. When changing ambient temperature in the range of +40…+60 °C, the luminous flux of LEDs is significant decreases even in the case when their current is kept constant, as we can see from documentation for most of LED types. An article analyzes the effect of temperature on electrical and light parameters LEDs with different types of drivers as part of LED lighting devices, such as LED lamps and LED spotlights, in order to offer possible constructive solutions for partial reduction or elimination of the decline problem luminous flux of LED devices under conditions of their operation at high temperatures.
ISSN:2571-5577
2571-5577
DOI:10.3390/asi6030057