scholarly journals Research on illumination uniformity of high-power LED array light source

2018 ◽  
Author(s):  
Xiaolong Yu ◽  
Xueye Wei ◽  
Ou Zhang ◽  
Xinwei Zhang
Keyword(s):  
Light Source ◽  
High Power ◽  
Led Array ◽  
High Power Led

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.

scholarly journals Lifetime prediction of a multi-chip high-power LED light source based on artificial neural networks

2019 ◽  
Vol 12 ◽  
pp. 361-367 ◽  
Author(s):  
Hongwei Liu ◽  
Dandan Yu ◽  
Pingjuan Niu ◽  
Zanyun Zhang ◽  
Kai Guo ◽  
...  
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Light Source ◽  
High Power ◽  
Lifetime Prediction ◽  
Led Light ◽  
High Power Led ◽  
Artificial Neural

Toward low-cost, stable, and uniform high-power LED array for solar cells characterization

2020 ◽  
Author(s):  
Minnatullah Moustafa ◽  
Anwar M. Sahbel ◽  
Sameh O. Abdellatif ◽  
Khaled A. Kirah ◽  
Hani Ghali
Keyword(s):  
Solar Cells ◽  
High Power ◽  
Low Cost ◽  
Led Array ◽  
High Power Led

Testing a high-power LED based light source for hyperspectral imaging microscopy

2017 ◽  
Author(s):  
Phiwat Klomkaew ◽  
Sam A. Mayes ◽  
Thomas C. Rich ◽  
Silas J. Leavesley
Keyword(s):  
Light Source ◽  
Hyperspectral Imaging ◽  
High Power ◽  
High Power Led

scholarly journals Analysis and simulation of high-power LED array with microchannel heat sink

2013 ◽  
Vol 1 (2) ◽  
pp. 191-195 ◽  
Author(s):  
Xin Zhang ◽  
Ru-Chun Li ◽  
Qi Zheng
Keyword(s):  
High Power ◽  
Heat Sink ◽  
Microchannel Heat Sink ◽  
Led Array ◽  
High Power Led

Thick Film Approaches in High Power LED Array Module

2011 ◽  
Vol 2011 (CICMT) ◽  
pp. 000130-000133
Author(s):  
Hyo Tae Kim ◽  
Jihoon Kim ◽  
Young Joon Yoon ◽  
Chang Yeoul Kim ◽  
Jong-hee Kim ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Thick Film ◽  
High Power ◽  
Light Emitting Diode ◽  
Life Time ◽  
Operating Voltage ◽  
Operation Temperature ◽  
Led Array ◽  
High Power Led ◽  
In Series

Light emitting diode, LED, has become a popular device for display and lighting applications. Among them, high power LED array modules are especially interested in the field of street light system, recently. High power LED array module is generally consisted of several pieces of LEDs which are mounted on the PCB with the combination of series and parallel circuits according to the designed operating voltage and power consumption, i.e. total wattages. Since the life time expectancy and brightness of LED are greatly influenced by the operation temperature of LED, thermal management technology of LED module including system design, heat transfer and dissipation become a hot issue in these days. In this work, we would like to present several thick film approaches to fabricate thermally efficient high power, i.e. LED array modules with over 50 watts by using different array package design, materials selection and film forming techniques. Here, we will demonstrate 50 watts LED array modules directly coupled with aluminum, copper or silicon heat sinks which operates at 12volts using 4 × 9, 4 pieces of LED in series multiplied by 9 arrays in parallel, LED array circuit. The microstructure of metal-ceramic multilayers and interfaces, and the heat transfer performance of the LED array modules will be presented.

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