Predicting solutions toward improved high power white LED light sources: a combined theoretical and experimental study

2008 ◽  
Author(s):  
C. Sommer ◽  
F. P. Wenzl ◽  
L. Kuna ◽  
E. Zinterl ◽  
J. R. Krenn ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Power ◽  
Light Sources ◽  
White Led ◽  
Led Light

A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources

2009 ◽  
Vol 31 (6) ◽  
pp. 837-848 ◽  
Author(s):  
Christian Sommer ◽  
Paul Hartmann ◽  
Peter Pachler ◽  
Marko Schweighart ◽  
Stefan Tasch ◽  
...  
Keyword(s):  
High Power ◽  
Light Sources ◽  
White Led ◽  
Led Light

The Effect of the Phosphor Particle Sizes on the Angular Homogeneity of Phosphor-Converted High-Power White LED Light Sources

2009 ◽  
Vol 15 (4) ◽  
pp. 1181-1188 ◽  
Author(s):  
C. Sommer ◽  
J.R. Krenn ◽  
P. Hartmann ◽  
P. Pachler ◽  
M. Schweighart ◽  
...  
Keyword(s):  
High Power ◽  
Light Sources ◽  
Particle Sizes ◽  
White Led ◽  
Phosphor Particle ◽  
Led Light

scholarly journals Analysis on High-Power Seaport LED Luminaire with Uniform Light Distribution Based on Optimized Lens and Heatsink

2021 ◽  
Vol 11 (9) ◽  
pp. 4035
Author(s):  
Jinsheon Kim ◽  
Jeungmo Kang ◽  
Woojin Jang
Keyword(s):  
Light Source ◽  
High Power ◽  
Heat Dissipation ◽  
Light Emitting Diode ◽  
Light Distribution ◽  
Light Sources ◽  
Led Light ◽  
High Power Led ◽  
Distribution Requirement ◽  
Lighting Application

In the case of light-emitting diode (LED) seaport luminaires, they should be designed in consideration of glare, average illuminance, and overall uniformity. Although it is possible to implement light distribution through auxiliary devices such as reflectors, it means increasing the weight and size of the luminaire, which reduces the feasibility. Considering the special environment of seaport luminaires, which are installed at a height of 30 m or more, it is necessary to reduce the weight of the device, facilitate replacement, and secure a light source with a long life. In this paper, an optimized lens design was investigated to provide uniform light distribution to meet the requirement in the seaport lighting application. Four types of lens were designed and fabricated to verify the uniform light distribution requirement for the seaport lighting application. Using numerical analysis, we optimized the lens that provides the required minimum overall uniformity for the seaport lighting application. A theoretical analysis for the heatsink structure and shape were conducted to reduce the heat from the high-power LED light sources up to 250 W. As a result of these analyses on the heat dissipation characteristics of the high-power LED light source used in the LED seaport luminaire, the heatsink with hexagonal-shape fins shows the best heat dissipation effect. Finally, a prototype LED seaport luminaire with an optimized lens and heat sink was fabricated and tested in a real seaport environment. The light distribution characteristics of this prototype LED seaport luminaire were compared with a commercial high-pressure sodium luminaire and metal halide luminaire.

The Chromaticity Shift of White-LED Light Sources Passing through Fog

2013 ◽  
Author(s):  
Chiu-Chung Yang ◽  
Chien-Sheng Huang ◽  
Ching-Huang Lin ◽  
Chien-Yue Chen ◽  
Shao-Ciang Gan
Keyword(s):  
Light Sources ◽  
White Led ◽  
Led Light

scholarly journals Brightness Evaluation for White LED Light Sources with Different Packaging Density

2017 ◽  
Vol 101 (10) ◽  
pp. 469-473
Author(s):  
Tomonori Tashiro ◽  
Michico Iwata ◽  
Miyoshi Ayama
Keyword(s):  
Light Sources ◽  
White Led ◽  
Led Light

Thermal and optical aspects of glob-top design for phosphor converted white LED light sources

2013 ◽  
Author(s):  
Christian Sommer ◽  
Paul Fulmek ◽  
Johann Nicolics ◽  
Susanne Schweitzer ◽  
Wolfgang Nemitz ◽  
...  
Keyword(s):  
Light Sources ◽  
White Led ◽  
Led Light
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