From LED die to a lighting system

Performance improvement in LED lighting by means of thermal management and smart control: Dissertation

Eveliina Juntunen

Research output: ThesisDissertationCollection of Articles

Abstract

Light-emitting diodes (LEDs) are solid-state light sources increasingly used in general illumination. Advanced properties, such as energy efficiency and long lifetime, are promoting LED replacement over traditional lamp-based solutions. Features like small size and ease of control are also appreciated among the lighting community. Smart lighting with advanced control has attracted particular attention recently due to the increased energy savings via added intelligence. Besides the environmental reasons, the economic impact of LED lighting technology development is significant, with solid growth predicted for the energy-efficient lighting market. This thesis addresses high-power LED lighting technology development at four different levels. At the component, module and luminaire levels, the research concentrates on thermal management, which is considered one of the main factors for reliability and performance. The research focus is on reducing the thermal resistance of the high-power LED structure. This is achieved with thermal vias through the insulation layer of the substrate under the heat source. As a result, a total thermal resistance reduction of 10-55% is shown in comparison with commercial substrate technologies. Energy efficiency is considered the measure of the achievements at the luminaire and system levels. The topic is studied with a pedestrian street lighting installation in a real use environment. Case examples of dimming the street lighting according to natural light levels and pedestrian presence revealed power savings of more than 40% with smart control.
Original languageEnglish
QualificationDoctor Degree
Supervisors/Advisors
  • Jantunen, Heli, Supervisor, External person
Award date24 Oct 2014
Place of PublicationEspoo
Publisher
Print ISBNs978-951-38-8152-8
Electronic ISBNs978-951-38-8153-5
Publication statusPublished - 2014
MoE publication typeG5 Doctoral dissertation (article)

Fingerprint

Light emitting diodes
Lighting
Street lighting
Heat resistance
Energy efficiency
Dimming (lamps)
Substrates
Electric lamps
Temperature control
Light sources
Thermal management (electronics)
Insulation
Energy conservation
Economics
Hot Temperature

Keywords

  • LED lighting
  • street lighting
  • thermal resistance
  • thermal via
  • smart control
  • energy savings

Cite this

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title = "From LED die to a lighting system: Performance improvement in LED lighting by means of thermal management and smart control: Dissertation",
abstract = "Light-emitting diodes (LEDs) are solid-state light sources increasingly used in general illumination. Advanced properties, such as energy efficiency and long lifetime, are promoting LED replacement over traditional lamp-based solutions. Features like small size and ease of control are also appreciated among the lighting community. Smart lighting with advanced control has attracted particular attention recently due to the increased energy savings via added intelligence. Besides the environmental reasons, the economic impact of LED lighting technology development is significant, with solid growth predicted for the energy-efficient lighting market. This thesis addresses high-power LED lighting technology development at four different levels. At the component, module and luminaire levels, the research concentrates on thermal management, which is considered one of the main factors for reliability and performance. The research focus is on reducing the thermal resistance of the high-power LED structure. This is achieved with thermal vias through the insulation layer of the substrate under the heat source. As a result, a total thermal resistance reduction of 10-55{\%} is shown in comparison with commercial substrate technologies. Energy efficiency is considered the measure of the achievements at the luminaire and system levels. The topic is studied with a pedestrian street lighting installation in a real use environment. Case examples of dimming the street lighting according to natural light levels and pedestrian presence revealed power savings of more than 40{\%} with smart control.",
keywords = "LED lighting, street lighting, thermal resistance, thermal via, smart control, energy savings",
author = "Eveliina Juntunen",
note = "Project code: 86460",
year = "2014",
language = "English",
isbn = "978-951-38-8152-8",
series = "VTT Science",
publisher = "VTT Technical Research Centre of Finland",
number = "64",
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From LED die to a lighting system : Performance improvement in LED lighting by means of thermal management and smart control: Dissertation. / Juntunen, Eveliina.

Espoo : VTT Technical Research Centre of Finland, 2014. 134 p.

Research output: ThesisDissertationCollection of Articles

TY - THES

T1 - From LED die to a lighting system

T2 - Performance improvement in LED lighting by means of thermal management and smart control: Dissertation

AU - Juntunen, Eveliina

N1 - Project code: 86460

PY - 2014

Y1 - 2014

N2 - Light-emitting diodes (LEDs) are solid-state light sources increasingly used in general illumination. Advanced properties, such as energy efficiency and long lifetime, are promoting LED replacement over traditional lamp-based solutions. Features like small size and ease of control are also appreciated among the lighting community. Smart lighting with advanced control has attracted particular attention recently due to the increased energy savings via added intelligence. Besides the environmental reasons, the economic impact of LED lighting technology development is significant, with solid growth predicted for the energy-efficient lighting market. This thesis addresses high-power LED lighting technology development at four different levels. At the component, module and luminaire levels, the research concentrates on thermal management, which is considered one of the main factors for reliability and performance. The research focus is on reducing the thermal resistance of the high-power LED structure. This is achieved with thermal vias through the insulation layer of the substrate under the heat source. As a result, a total thermal resistance reduction of 10-55% is shown in comparison with commercial substrate technologies. Energy efficiency is considered the measure of the achievements at the luminaire and system levels. The topic is studied with a pedestrian street lighting installation in a real use environment. Case examples of dimming the street lighting according to natural light levels and pedestrian presence revealed power savings of more than 40% with smart control.

AB - Light-emitting diodes (LEDs) are solid-state light sources increasingly used in general illumination. Advanced properties, such as energy efficiency and long lifetime, are promoting LED replacement over traditional lamp-based solutions. Features like small size and ease of control are also appreciated among the lighting community. Smart lighting with advanced control has attracted particular attention recently due to the increased energy savings via added intelligence. Besides the environmental reasons, the economic impact of LED lighting technology development is significant, with solid growth predicted for the energy-efficient lighting market. This thesis addresses high-power LED lighting technology development at four different levels. At the component, module and luminaire levels, the research concentrates on thermal management, which is considered one of the main factors for reliability and performance. The research focus is on reducing the thermal resistance of the high-power LED structure. This is achieved with thermal vias through the insulation layer of the substrate under the heat source. As a result, a total thermal resistance reduction of 10-55% is shown in comparison with commercial substrate technologies. Energy efficiency is considered the measure of the achievements at the luminaire and system levels. The topic is studied with a pedestrian street lighting installation in a real use environment. Case examples of dimming the street lighting according to natural light levels and pedestrian presence revealed power savings of more than 40% with smart control.

KW - LED lighting

KW - street lighting

KW - thermal resistance

KW - thermal via

KW - smart control

KW - energy savings

M3 - Dissertation

SN - 978-951-38-8152-8

T3 - VTT Science

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -