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LpR 44 | July/Aug 2014 

lpr44_front
> Tech-Talks BREGENZ: Walter Werner
> Advanced Primary Optics
> LED Light Spectrum Enhancement
> Discomfort Glare Perception

 


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Tech-Talks BREGENZ
Walter Werner, Werner Mgmt. Services, CEO
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p 28)

Technology
Advanced Primary Optics for Improved Light Efficiency and Low Cost
by Kim Sung-Phil, LG Innotek (p 34)

LED Light Spectrum Enhancement with Transparent Pigmented Glazes
by Jan-Marie A Spanard, Light Spectrum Glazes (p 40)

Electronics
How To Power and Protect LEDs Properly
by Tony Armstrong, Linear Technology (p 50)

Reducing Time to Market for Cost-Effective AC LED Driver ICs
by Volker Herbig & Tilman Metzger, X-FAB Silicon Foundries (p 54)

Characterization
Discomfort Glare Perception of Non-Uniform Light Sources in an Office Setting
by L. M. Geerdinck et al., Philips Research (p 58)

Manufacturing
Concept of a Time-Proven LED Luminaire Design and Manufacturing Process
by Angela Betancourt, for Lumitec Lighting (p 64)

 

 

 


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LpR 43 | May/June 2014

lpr_43_front
> Tech-Talks BREGENZ: Martina Paul
> Light + Building 2014: Post-Show Report
> White LED Color Design
> Smart Lighting Report

 


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Tech-Talks BREGENZ
Martina Paul, General Secretary, CIE
by Siegfried Luger, LED professional (p 34)

Events
Light + Building Review - Trends, Innovations and Technological Tidbits
by Arno Grabher-Meyer, LED professional (p 40)

Manufacturing
Implementing an Automated High-Tech LED Luminaires Production Line
by Darko Crha, Data Link (p 52)

Producing Cost-Effective LED Lamps and Modules Using 3D Technology
by Barbara Stumpp & Stephan Krause, LPKF Laser & Electronics (p 58)

Technology
White LED Color Design and Variation Reduction
by Ichikawa Akira, Asahi Rubber (p 62)

Special Topic
Technology Aspects for the Smart Buildings Lighting Controls Business
by Arno Grabher-Meyer, LED professional (p 68)



 

LpR 42 | Mar/Apr 2014 --- Light+Building, Lightfair International Issue

LpR#42
> OLED Technology Trends
> LED Technologies for Streetlighting
> Smart Lighting - Sensor & Wireless Control
> LED Reliability - Overstress & Solder Joints

 


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Events
Lighting Japan – Strong Focus on OLEDs
by Arno Grabher-Meyer, LED professional (p 30)

Interview - Prof. Fischer-Hirchert
Using LED Technology in Street Lighting
by Siegfried Luger, LED professional (p 42)

Technology
Solder Joint Reliability of LED Packages
by Saritha Rajamma, Cree Corp. (p 46)

Electronics
Electrical Overstress Protection of LEDs with Proper Circuit Design and Layout Practices
by Ron Bonné, Takaaki Yagi & Masaki Nishizawa, Philips Lumileds (p 52)

Driving Large Scale LED Panels Efficiently
K.H. Loo, Y.M. Lai & C.K. Tse, The Hong Kong Polytechnic University (p 60)

Application
Sensor-Driven Designs to Allow More LED Bins and Lower Costs
by Sajol Ghoshal, ams (p 64)

LED Light Tile Technology for Lighting and Backlighting
by Dr. James Gourlay, Design LED Products (p 70)

Standardization
ZigBee Light Link – The Technology for Residential Wireless Lighting Control
Simon den Uijl et al., The Connected Lighting Alliance (p 74)

Optics
Using Interactive Optimization Utilities to Improve LED Lightpipe Designs
Dr. Edward Freniere & Michael Gauvin, Lambda Research Corp. (p 78)



 

LpR 41 | Jan/Feb 2014

LpR_41> Photometry Standardization
> Measurement with Integrating Spheres
> Standards for Smart Lighting
> Voltage Limits for PWM Operated LED Drivers
> Article Index 2013


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Standardization
Photometry Standardization Developments for OLEDs and LEDs
by Tony Bergen & Peter Blattner, CIE Division 2 (p 24)

New EC Regulation – How to Measure Directional Light Sources
by Christian Krause, Viso Systems Aps (p 30)

Interview - Simon den Uijl
About Wireless Standards for Smart Lighting
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p 34)

Technology
Optimization of SSL LED Devices
by Ralph Bertram & Alexander Wilm, Osram Opto Semiconductors (p 38)

Electronics
Safety Issues for LED Drivers with PWM Operation Modes
by Siegfried Luger, Luger Research & John Showell, Product Approvals (p 44)

Measurement
Using Integrating Spheres Correctly to Measure LEDs
by Mikolaj Przybyla, GL OPTIC / Just Normlicht GmbH (p 48)

Application
LightingMonaLisawithLEDs-DetailsConcerningInnovatingTechniques
by Marc Fontoynont et al., Interdisciplinary Development Team (p 52)



 

LpR 40 | Nov/Dec 2013

LpR 40> LpS 2013 Review
> Standards & LED Measurement
> LED Drivers with Special Features
> LED Light Quality


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Events
LpS 2013 - A Comprehensive Program, Trends, Innovations and New Product Launches
by Arno Grabher-Meyer, LED professional (p 22)

Interview - Michael Gall & Micolaj Przybyla
Light Quality and Standardized Measurement
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p 32)

Electronics
LED Converter With High Dimming Performance
by Giulio Borsoi, Mathias Burger & Christian Nesensohn, Tridonic (p 38)

Intelligent Over Temperature Protection for LED Lighting Applications
by Bernd Pflaum & Hakan Yilmazer, Infineon Technologies (p 46)

Characterization
HD-Retina LED Technology - Light Quality Beyond CRI
by Giulio Vezzani, Martini Light (p 52)

Application
Light Quality and Appropriate Light Measuring Methods in Demanding Applications
by Rich Rosen, Litepanels (p 56)

Manufacturing
Manufacturing Silicone Lenses and LED Packaging
by Tarik Karsandik, Tengifts Technology (p 60)

Special Topics
Key Technologies – Drivers of the (LED) Lighting
by Arno Grabher-Meyer, LED professional (p 64)



 

LpR 39 | Sept/Oct 2013

LpR_#39_FrontCover> Reliability-Oriented Design
> Natural Design for Heat Sinks
> Micro- and Nanostructured 3D LED Technologies
> Safety Regulations & Production Testing


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Special Topics
Solid-State Lighting Considerations
by Siegfried Luger, LED professional (p 30)

Interview - Giorgio Anania
Status of Micro- and Nanostructured 3D LED Technologies
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p 34)

Application
Contactless LED Technology
by Alain Guimont, HEICO lighting (p 40)

Standardization
The Challenge of Designing Safer LED Lighting Products
by John Showell, Product Approvals Ltd. (p 46)

Technology
Reliability Oriented Design of LED-Based Light Sources
by Matteo Meneghini et al., University of Padova, LightCube SRL (p 52)

LED and Lens Degradation Through Volatile Organic Compounds
by Edward Steinke, Cree Corp. (p 58)

Thermal
Natural Design for Heat Sinks
by Ch. Herbold & C. Neumann, Karlsruhe Institute of Technology (p 64)

Manufacturing
The Necessity and Feasibility of Production Testing for LED Lighting Products
by Bernie Chang, Chroma ATE (p 70)



 

LpR 38 | July/Aug 2013

LpR_#38_FrontCover> In-Line Process Control
> LED Lighting Taiwan
> OLED Technology Status & Outlook
> MOCVD Platforms


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Evntes
LED Lighting Taiwan Review -
Focus on Taiwan’s Key Players in the SSL Market 
by Arno Grabher-Meyer, LED professional (p 30)

Interview
In-Line Process Control and Yield Management in LED Manufacturing
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p 38)

Technology
OLED Technology in Lighting Applications - Current Status and Outlook
by Franco Musiari, ASSODEL (p 42)

New MOCVD Platform for Cost-Effective Production of GaN-based HB LEDs
by Shiping Guo, Advanced Micro-Fabrication Equipment Inc. (p 48)

High-Index Nanocrystals
Key to Next Generation Advancements in Lighting
by Gregory Cooper, Pixelligent Technologies LLC (p 52)

Application
Handheld Photometry Supports LED Lighting Design
by Norbert Harkam, SalesLink GmbH / UPRtek (p 56)

Special Topic
Trends in LED Lighting Design and Function
by Mick Wilcox & Aaron Merrill, Bridgelux (p 60)



 

LpR 37 | May/June 2013

LpR37_front> Heatsinks & Silicones
> Electrical Protection of LEDs
> Fluorescent Tube Replacement
> Optical Lithography


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Application
FL Replacement LED Tubes - Challenges and Technologies
by Arno Grabher-Meyer, LED professional (p32)

Interview
Digital Driver IC Chip Designs for Retrofit Bulbs
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p38)

Technology
New Optical Lithography Method for Advanced Light Extraction in LEDs
by T. Uhrmann & H. Solak, et.al, EV Group & Eulitha AG (p 42)

Thermal Management
Thermal Management for LEDs Beyond Thermal Conductivity Values
by Jade Bridges, Electrolube (p 48)

Choosing the Appropriate Heatsink for an Application
by Jürgen Harpain, Manager of Development at Fischer Elektronik (p 52)

Electronics
Protecting LEDs from Electrical Overstress Faults
by Joe Dinkel & Spencer Guo, TE Circuit Protection (p 58)

 


 

LpR 36 | Mar/Apr 2013

LpR36_front> Printed Optics
> LED Light Bulb Technology
> Material Parameters of Optical Encapsulates
> Emission Characteristic & Efficiency


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Standardization
Labeling and Certification Testing Issues
by Arno Grabher-Meyer, LED professional (p30)

Interview
Optics Production Technology for Customizing LED Luminaires
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p34)

Technology
How Silicones are Evolving to Meet the Growing Needs of the LED Lighting Industry
by F. de Buyl, M. Beukema and K. van Tiggelen, Dow Corning (p40)

Characterization
The Influence of LED Emission Characteristics on the Efficiency of Lighting Systems
by Roland Schulz, Osram Opto Semiconductor (p46)

Application
An Economical Omnidirectional A19 LED Light Bulb
by Chen-Peng Hsu, Industrial Technology Research Institute (ITRI) (p52)

 


 

LpR 35 | Jan/Feb 2013

lpr35front> Zhaga - A Successful Strategy
> Copper Bonding Wires
> TRIAC Dimming - EMI
> Lacquer Systems for PCBs


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Commentary
The Mandatory Basis for Professional LED Lighting
by Guido Nattkemper, BAG electronics Group (p 4)

Events
LED Acceptance in the Global Lighting Market Continues to Grow
by Alan Mills, LED professional (p26)

Interview
Zhaga – A Successful Strategy for Luminary Manufacturers
by Siegfried Luger, LED professional (p 30)

LED & OLED Technology
Copper Bonding Wires - A Feasible Solution for LED Packaging
by Dominik Stephan & Alon Menache, RED Micro Wire (p34)

Electronics
EMI Problems in TRIAC Dimmable LED Drivers
by Bianca Aichinger, RECOM Lighting (p38)

Thermal Management
Reliable Thermal Management of High-Power LEDs
by Stefan Hörth, Haeusermann (p42)

Manufacturing
Lacquer Systems for PCBs
Optical Requirements and Performance in Applications
by Dr. Manfred Suppa & Johannes Tekath, Lackwerke Peters (p46)

Special Topic
DC-Grids - Challenges and Chances for LED Lighting
by Arno Grabher-Meyer, LED professional (p52)

Article Index 2012

 


 

LpR 34 | Nov/Dec 2012

LprR31_frontpage_150px> LpS 2012 Review
> OLED Tech-Panel Discussion
> Sensors and Feedback Control
> Tunable Lens Technology


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Commentary
It's the Overall Solution that Counts, Not the Single Component
by Stephan Wegstein, RECOM Lighting (p 4)

Events
LpS 2012 Awed Lighting Experts with Its Top Class Exhibition and a New Interactive Lecture Concept
by Arno Grabher-Meyer, LED professional (p 24)

Interview
LpS 2012 - OLED Technologies Tech-Panel Discussion
Summary of an Expert Discussion by Siegfried Luger, LED professional (p 38)

Application
Human-Centric Lighting: Sensor Technology for Full-Spectrum Lighting Solutions
by Sajol Goshal, ams (p 42)

Sensors and Feedback Control of Multi-Color LED Systems
by Thomas Nimz, Fredrik Hailer & Kevin Jensen, MAZeT GmbH (p 46)

Optics
Focus Tunable Lenses for LED Lighting
by Joerg Wertli, Optotune AG (p 50)

Thermal Management
Designing Integrated High-Power LED Systems
by A. Lohrer, Endrich Bauelemente & J. Schäfer, TURCK duotec (p 54)

 


 

LpR 33 | Sept/Oct 2012

LprR31_frontpage_150px> Special Topic: Zhaga
> Aspects of Light Quality
> Photometry for Street Lighting
> Thermal Simulations of Retrofit LED Bulbs


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Commentary
Is the LED Fit for Lighting Solutions
by Peter Dehoff, Zumtobel Austria (p 4)

Project
An LED Solution for Historic Monumental Electric Chandeliers
by Ron Ramselaar, Ramselaar Lighting Solutions & M. Brouwers, Government Buildings Agency    (p 30)

Practical Results of a Gas Station Refurbishment with LED Luminaires
by Stelian Matei, Electromagnetica SA    (p 34)

Application
Development Process for a Metal-Halide Replacement LED Module
by Fred Bass, Neonlite International Ltd. & MEGAMAN    (p 38)

Interview
LED Market and Development Trends from the Point of View of a Full-Range Trader in Lighting
Interview with Beate Jungwirth & Dr. Christopher Keusch from Everlight
by Siegfried Luger & Arno Grabher-Meyer, LED professional    (p 42)

Thermal Management
Methods of Determining LED Operating Junction Temperature
by Mika Maaspuro & Aulis Tuominen, University of Turku    (p 46)

Charakterization
Mesopic Photometry - An Accurate System of Road Lighting Evaluation
by Prija Jain, Surya Roshni Ltd.    (p 54)

Aspects of Light Quality in Solid State Lighting
by Alexander Wilm, OSRAM Opto Semiconductors    (p 60)

Optics

Additive Manufacture of Optics Goes Digital
by Marco de Visser, LUXeXceL B.V.    (p 68)

Special Topics: Zhaga
Introduction to Zhaga and Zhaga’s Spotlight Specification
by Menno Treffers, Philips Lighting, Zhaga’s Secretary General    (p 77)

Key Facts on the Mechanical Properties of Book 3 Modules
by Ralph Bertram, Osram and Martin Creusen, Philips Lighting    (p 80)

Zhaga’s Light Emitting Surface (LES) Concept and its Impact on the Light Distribution
by Stefan Lorenz, Osram    (p 82)

Criteria of the Photometric Interface of a Zhaga Compatible LED Light Engine
by Horst Rudolph, Trilux    (p 84)

The Optional Locking Ring – A Quick Connection for Zhaga’s Book 3 Modules
by Matteo Raimond, A.A.G. Stucchi    (p 86)

Proper Thermal Interface Calculation for an Optimized Heatsink Design
by Jan de Graaf, Philips Lighting; Uli Mathis, Tridonic and Evans Thompson, Cooper Lighting    (p 90)

Testing the Thermal Interface Power of Zhaga Book 3 Modules Correctly
by Jan de Graaf, Philips Lighting; Uli Mathis, Tridonic and Evans Thompson, Cooper Lighting    (p 92)

Zhaga’s New Housing Strategy Simplifies Interchangeability of Electronic Control Gear
by Norbert Wittig, Panasonic Lighting Europe    (p 94)

 


 

LpR 32 | July/Aug 2012

LprR31_frontpage_150px> LpS 2012 - Preview
> LED Substrate Technology
> LED Operating Junction Temperature
> Remote Phosphor Optimization


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Commentary
Class Instead of Mass - Quality Makes the Difference with LEDs, too
by Sigrun Heiden, editor for the technical journal LICHT(p4)

Events
LFI 2012, LED-Lighting and Architecture Progress
by Alan Mills, LED professional (p24)

LpS 2012 Preview - Latest Technologies, Presentations, Discussions and Networking
by Gerlinde Graf, LED professional (p28)

Interview
Metal Alloy Substrate Technology - An Alternative to Sapphire
Interview with Dr. Chuong Anh Tran, President at SemiLEDs Corp.
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p34)

Optics
Glass Optics for LED Applications
by Thomas Hessling, Auer Lighting (p38)

Thermal Management
Energy Efficiency and Thermal Simulations of a Retrofit LED Light Bulb
Experimental and Theoretical by James R. Pryde, Integrated System Technologies (p42)

Novel Approaches to Thermal Management for Power LED Packaging
by Nan Jiang, James P. Novak & Zvi Yaniv, Applied Nanotech Inc. (p50)

Special Topics
Optimizing Remote Phosphor for LED Lamp Applications
by Guenther Hasna, Optis GmbH (p56)

 


 

LpR 31 | May/June 2012

LprR31_frontpage_150px> Light+Building Review
> Zhaga Standardization
> LED Module Selection Considerations
> Driverless LED Light Engines


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Commentary
The Future Lies in LED Lighting - Trade Fair Impressions of an Exhimiting Network
by Sebastian Lyschick, Osram Opto Semiconductors (p4)

Events
Light+Building Review – Zhaga Standard, High Quality Lighting & OLEDs
by Arno Grabher-Meyer, LED professional (p26)

Interview
Zhaga - Insights into the New LED Lighting “Standard” for Light Engines
Interview with Zhaga spokesperson Greg Galluccio, Leviton
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p38)

Application
LED Module Selection Considerations – The Datasheet and Beyond
by John Yriberri, Director of Global Application Engineering, Xicato (p42)

Electronics
Driverless LED Light Engines
by Bob Kottritsch, Vice President, & Mike Miskin, CEO, Lynk Labs (p50)

Thermal Considerations for Driving LED Strings with CCRs
by Steve Sheard, Strategic Programs Manager, ON Semiconductor (p56)

 


 

LpR 30 | Mar/Apr 2012

lpr_30_front_150px> Light+Building Preview
> LED Modules & PCBs
> Phosphor Green LEDs
> Buck-Based Offline Drivers


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Commentary
Solid State Luminaires Pave the Way for an Industry: From Metal Sheet Forming to Optoelectronic Systems
by Christian Hochfilzer, Regent Lighting (p4)

Events
Light+Building Highlights – Exhibits Focus on Energy Efficiency and Versatility
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p26)

Interview
LED Technology – Changing the Component Business in the Area of Lighting
Interview with Volker Neu, Vossloh-Schwabe Optoelectronic
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p34)

Application
New Approach for a Modular LED COB System up to 500 W
by Magnus Ahlstedt & Johann Ramchen, Optogan (p38)

PCB Design for a High End Stage Light
Stefan Hoerth, Haeusermann (p42)

Technology
Closing the Green Gap: A Long-Pass Dichroic Filter-Capped PC-LED
by Young Rag Do, Department of Chemistry, Kookmin University (p46)

Electronics
Energy Efficiency of Buck-Based Offline LED Drivers
by Mikka Maaspuro, Pauli Auramaa & Aulis Tuominen, Univ. of Turku (p52)

 


 

LpR 29 | Jan/Feb 2012

lpr29_150w> LED Driver Technologies
> Planar Remote Phosphor Technology
> Silicon Integrated Passive Device Technology
> OLED Report


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Commentary
LED Lighting Trends in 2012: The Rise of Lighting Solutions?
by Pars Mukish, Yole Développement (p4)

Events
Organic Light Emitting Diodes (OLEDs) Continue to Advance
by Alan R. Mills, LED professional (p26)

Interview
Microcontroller Based LED Drivers Initiate New Potentials
Interview with Alex Zaretsky, Lighting Segment Marketing Manager, Renesas Electronics Europe GmbH
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p30)

Technology
Fundamentals of Planar Remote Phosphor LEDs
by Dr. Yosi Shani, CTO, Oree (p34)

Silicon Integrated Passive Device Technology for LED Applications
by Laurent Dubos, Market Segment Director for Lighting, IPDiA (p38)

Optics
Polycarbonate Leads in LED Applications
by Bala Ambravan, Global Product Marketing Director, SABIC (p44)

Electronics
Resonant Converter Based LED Drivers
by Peter B. Green, LED Group Manager, International Rectifier (p48)

DC/DC Converters Offer Flexibility when Designing LED Drivers
by Steve Roberts, Technical Director of the RECOM (p54)

Article Index 2011

 


 

LpR 28 | Nov/Dec 2011

LpR28> LpS 2011 - Review
> AC LED Technology
> Print-Optical Technology
> Fluid Cooling


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Events
LED professional Symposium +Expo 2011
Fascinated LED Lighting Specialists from All Over the World 
by Arno Grabher-Meyer, LED professional (p26)

Interview
New Aspects of AC LED Technologies
Interview with Manuel Zarauza,Managing Dir., Seoul Semiconductor 
by Siegfried Luger, LED professional (p40)

Optics
LED Secondary Optics Technology
by Molly Lin, Marketing Section Manager, Ledlink (p44)

Print-Optical Technology – Manufacture LED Lenses by Stacking Droplets-On-Demand
by Richard de Vrie, CEO, Kurt Blessing, CTO, LUXeXceL Group B.V. (p48)

Thermal
Effective LED Replacement Bulb Cooling by Passive Convection
by David Horn, CTO, Ronan Le Toquin, Tech. Director, Switch Lighting (p54)

 

LpR 27 | Sept/Oct 2011

LpR27_frontpage> Enhanced LED Driving Concepts
> Patterned Sapphire Substrates
> HB-LEDs on FR4 PCBs
> Lighting Event Report
> PREVIEW - LpS 2011


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Events
LpS 2011 Advisory Board Q & A
by Siegfried Luger, LED professional (p26)

LED Lighting Taiwan 2011 - Photonics is LEDs
by Arno Grabher-Meyer, LED professional (p28)

Interview
New Technology Concepts in the LED Lighting Industry Thomas Zabel, e:lumix 
by Siegfried Luger, LED professional (p38)

Technology
Sapphire Wafer Wet Etching versus Dry Etching
by Carolyn Gruske & Derek Mendes, Imtec Acculine Inc. (p42)

Electronics
An Advanced and Complete LED Driving Solution
by Luigi Pistoni & Massimiliano Merisio, STMicroelectronics (p48)

High-Efficient, High-Power Multi-Channel LED Driver
by Winfried Beyer & Stephan Gruber, exscitron GmbH (p54)

Special Topics
High Brightness LEDs on FR4 Laminates
by Gerhard Neumann, melecs GmbH & Co KG (p62)

 

LpR 26 | July/Aug 2011

LpR26_Frontpage> Color Conversion Technologies
> Driver Reliability
> Driver Technology for Optimized Efficiency
> Interview: Insights Into Recent LED Developments

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Interview
"Insights Into Recent LED Developments" Interview with Eric Virey, Yole Développement
by Siegfried Luger and Arno Grabher-Meyer, LED professional (p 24)

Technology
"Growing GaN Epi Layers on 200 mm Silicon Substrates for LED Applications"
by Kai Cheng, Johan Dekoster, imec, and Sung Won Jun, Jose-Ignacio Del-Agua-Borniquel, Applied Materials (p 28)

"Influence of the Phosphor Selection on Lighting Quality"
by Dan O’Hare and Jonathan H. Melman, Intematix (p 34)

Electronics
"Highly Efficient and Reliable Power Supply for LED Street Lighting"
by Wonseok Kang and Sungmo Young, Fairchild Semiconductor (p 40)

"LED Drivers Help to Make LED Lighting Costs Competitive without Compromising Quality"
by Steve Roberts, Recom (p 44)

"LED Driving Techniques to Hit Power Efficiency Targets of TV Backlight Systems"
by Werner Schögler, Markus Luidolt, Manfred Pauritsch and Peter Rust, austriamicrosystems AG (p 48)

 

LpR 25 | May/June 2011

LpR25

> LED Street Lighting
> DC-Microgrids
> LED Signage Driver
> Thermal Management
> LED Investor Forum


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Event
"LED Investor Forum 2011 - Santa Clara" by Alan R. Miles, LED professional (p26)

Interview
"LED Street Lighting - About Standards, Challenges and Misconceptions"
Interview with Prof. Tran Quoc Khanh, TU Darmstadt
by Siegfried Luger and Arno Grabher-Meyer, LED professional (p30)

Application
"DC Microgrids and SSL - Key Components for Zero Net Energy Buildings" 
by Brian T. Patterson, EMerge Alliance and Karen Lee, Osram Sylvania (p34)

Electronics
"LED Driver Innovations for High-Performance Signage"
by Roland Gehrmann, Toshiba Consumer & Industrial ICs (p40)

Thermal

"LED Cooling in Harsh Environments with Synthetic Jet Technology"
by Markus Schwickert and Brandon Noska, Nuventix (p44)

"Thermal Management of LED Lamps"
by A.Motoya, M. Kai, Y. Manabe and S.Shida, Panasonic Corp. (p48)

Special Topics
"HB-LED Alert Device with Intense Light Output"
by Jerry Vereen, Egret Technologies

 

LpR 24 | Mar./Apr. 2011

LpR 23

> Color Rendition Metric for LEDs
> DC-Grid & Communication
> LED Replacement Bulbs
> LED Cooling 
> Optical Plastics


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Interview
"The Optical Plastics Make a Difference to a Lens"
Interview with Peter Jackson and Tsuyoshi Okii from Styron LLC
by Arno Grabher-Meyer, LED professional (p 28)

Application
Active Cooled 75 to 100 W Equivalent LED Retrofit Bulbs
by Istvan Bakk, Tridonic, and Brandon Noska, Nuventix (p 32)

Re-Thinking a New Power and Control System for LED Lighting
by Mark Covaro, Redwood Systems (p 38)

Characterization
Advanced Lighting Technology Needs an Advanced Color Rendition Metric 
by Artūras Žukauskas, Rimantas Vaicekauskas, Vilnius University, Michael Shur, Rensselaer Polytechnic Institute(p 44)

Electronics
Sophisticated LED Driver Enhances Quality in Full Color Video Displays
by L. Pistoni, M. Merisiso, F. Lissoni, and W. Trovo, ST Microelectronics (p 50)

Thermal
Cooling High Power LEDs
by Norbert Engelberts, Advanced Thermal Solutions (p 54)

Remarks:
LED professional appologizes for erroneously having published a wrong author reference for the article "Advanced Lighting Technology Needs an Advanced Color Rendition Metric" in the index of this LpR issue. The correct title and acknowledgement should be: Advanced Lighting Technology Needs an Advanced Color Rendition Metric by Artūras Žukauskas, Rimantas Vaicekauskas, Vilnius University, Michael Shur, Rensselaer Polytechnic Institute (p 44)
If you have downloaded your copy before April 5th, 2011, please download the newly uploaded version again!


LpR 23 | Jan./Feb. 2011

LpR 23

> OLED Technology & Market Trends
> Digital LED Systems - Interview
> Tunable White Light
> TRIAC Dimming

 

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Events
The Display Industry Drives OLED Technology
by Alan R. Mills, LED professional (p 24)

Interview
"The Future of LED Systems is Digital"
Interview with Peter Deixler, Philips Eindhoven
by Arno Grabher-Meyer, LED professional (p28)

Application
Intelligent Lighting (Part II): From Definition to Implementation
by Osama Mannan, Future Lighting Solutions (p 32)

Technology
Understanding the Pitfalls of Tunable White Light LED Systems
by Madhan Kumar, Sachin Gupta, Cypress Semiconductors (p 38)

Electronics

Triac Dimmable Primary Side Regulated Flyback
by Michael Weirich,Fairchild Global Power ResourceSM Center EP (p 42)

Facts about Dimming
by Gregg Sheehan, Light-Based Technologies (p 48)

Charge Controled LED Drivers
by Jens Göhring, dilitronics (p 56)

Needed Accuracy of an LED Power Supply
by Christopher Richardson, National Semiconductors (p 60)

 

LpR 22 | Nov. / Dec. 2010

LpR 22

> Impressions from electronica
> Digital Controlled Street-Lighting
> TRIAC Dimming without Flickering
> Thermal Foldback Design
> Interview with ON Semiconductor

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Applications

Intelligent Lighting (Part1): From Definition to Implementation
by Osama Mannan, Future Lighting Solutions p26

Technology

“Status Quo and Perspectives of LED Driver ICs - Market and Technology”
Interview with Laurent Jenck and Marc Barboni from On Semiconductor
by Arno Grabher-Meyer, LED professional p32

Thermal Management

Thermal Foldback LED Design
by James Patterson, National Semiconductor Corporation p34

Drivers

Dimming without Flicker for LED Lighting Applications
by Bill Weiss, Power Integrations, Inc. p38

Optimization of LED Control Powered from Line Voltage
by Erhard Muesch , ZMDI p46

Street-Lighting Solution Based on a Digital Current Control
by N. Aiello, G. Macina, ST Microelectronics - IMS Systems Lab p50

The Multi-Stage Off Line LED Driver
by Peter B. Green, International Rectifier p52

 

LpR 21 | Sept. / Oct. 2010

LpR21

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Applications
SSL Adoption - Opportunities and Obstacles
by David Hammel, Aphos Lighting LLC  (p30)

Characterisation
How Much Store Should the Lighting Industry Set by the ANSI Standard for LED Chromaticity
by Thierry Suzanne, Future Lighting Solutions   (p34)

Technology
Factors That Drive LED Reliability
by Dr. Randy Kong, DfR Solutions  (p38)

Thermal Management
Junction Temperature in Package Design – The Key To Optimal Heat Dissipation
by Kay Fernandez, Lumex  (p42)

Drivers
Ballasts and Drivers for Conventional and Solid State Light Sources
Authors references shown on the article page  (p48)

Special Topics
CO2 Balance Sheet: Aluminum Versus Alumina Ceramics
by Dr. Meinhard Kuntz, CeramTec AG  (p58)

Distribution Today – All from One Source
by Rudy Van Parijs, EBV Technical Development  (p60)

 

 

LpR_20 150x210

LED Testing, Simulation & Manufacturing
LpR 20 | July / Aug 2010

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Characterization
LED Luminaire Lifetime: Recommendations for Testing and Reporting
by DOE Lifetime and Reliability Working Group (p22)

Comparison of Test Results from Different Korean Testing Laboratories
by Dong-Hoon Lee et al., Korea Research Institute of Standards and Science (p24)

Technology
LED Failure Modes and Methods for Analysis
by Holger Pross, RoodMicrotec GmbH (p28)

Optics
Considerations for Choosing a Miniature Spectrometer for LED Measurements
by Ryan M. Flaherty, Jason D. Pierce, Michelle Dean Ritchie, StellarNet, Inc. (p32)

Drivers
Traffic Lights and Signage Need Intelligence
by Alex Zaretsky, Renesas Electronics Europe (p38)

Special Topics
Distributor - Arrow: From Drivers to Diodes - All from One Single Source
by Stephan Wegstein, Arrow Central Europe GmbH (p42)

 

LpR19LED Light Generation

LpR 19 | May / June 2010


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Event Reports
Light+Building Review
by Arno Grabher-Meyer, LED professional (p20)

New Era for LEDs in Lighting
by Alan R. Mills PhD., LED professional (p28)

Applications
Incandescent Replacement Lamps and Health
by Wout van Bommel, Van Bommel Lighting Consultant (p30)

The Future of OLED Lighting
by Ian Ashdown, byHeart Consultants Ltd; Brent York, Tangenesys Consulting Ltd. (p34)

LED High Bay Lighting
by Michael Schratz, Dialight Corp. (p38)

Optics
Design and Manufacture of Achromatic Lenses
by Christoph Gerhard, Dr. Geoff Adams and Stephanie Wienecke (p40)

Drivers
About PLC Reliability
by Ashish Garg & Angad Singh Gill, Cypress Semiconductor Corp. (p44)

Exploration on Transmission Technology of RGB LED in Architectural Lighting
by Tiger Yen and Jerome Lee, Macroblock, Inc. (p48)

Optimizing LED Drivers for Power, Display Life and the Visual Experience
by Irene Signorino, Arkadiy Peker, Kevin Choi, Microsemi Corp. (p53)

Special Topics
Component Distributors – Partners for the LED Industry
by Ingo Guertler, Europartners Consultants; Siegfried Luger, LED professional (p58)

LED professional – Patent Report (p60)


LpR18


LED Application & Lighting Systems
Issue 18 | Mar / Apr 2010


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Applications
LED in General Lighting Applications
by Günther Sejkora, items – Innovation and Technology Management (p24)

LEDs For Shop Lighting: Interview with lighting designer Simone Mariotto
by Arno Grabher-Meyer, LED professional (p28)

Addressing the Rising Requirements for Solid State Lighting Products
by Mitch Sayers, Cree Europe GmbH (p32)

OLED Technology – Status of a Promising Lighting Solution
by Siegfried Luger, LED professional (p36)

LED Retrofits for Antique Style Roadway and Walkway Lights
by Heather Goldsmith, Future Lighting Solutions (p40)

Technology
High Quality GaN Substrates for Modern LED Technology
by A.E. Romanov, et al., CJSC “Optogan” / Ioffe Physical-Technical Institute RAS (p42)

Thermal Management
LED – Cooling and Thermal Management
by Lothar Noelle, Fischer Elektronik (p50)

Drivers
Intelligent LED Driver/Controllers Becoming Standard Modules
by Albert Berghuis, eldoLED (p56)

LED professional – Patent Report (p60)

 


LpR17


LED Thermal Management
Issue 17 | Jan / Feb 2010


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Event Reports
LED Forum Moscow 2009 & Interlight Moscow
by A. Grabher-Meyer, LED professional (p18)

Thermal Management
Thermally Activated Degradation of Phosphor-Converted White LEDs
by L. Trevisanello, M. Meneghini, Dept. of Information Engineering, University of Padova (p22)

LEDs and Heat: Managed or Micromanaged
by Dan Jacobs, OPTEK Technology (p30)

Advanced Thermal Management Materials for LED Packaging
by Carl Zweben, Ph. D., Advanced Thermal Materials Consultant (p34)

Thermally Conductive Plastics: Balancing Material Properties with Application Needs
by Dr. Ir. R.H.C. Janssen, Dr. Ir. L. Douven, Dr. H. K. van Dijk, DSM Research (p38)

Drivers
Driver Design Based on System Blocks
by Jon D. Pearson, Cypress Semiconductor Corp. (p42)

Annual LED professional Review (LpR) Article Index 2009 (p46)

LED professional – Patent Report (p48)

 


LpR16


LED Testing, Simulation & Manufacturing
Issue 16 | Nov / Dec 2009


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Event Reports
OLEDs 2009
by Alan R. Mills, LED professional (p14)

Applications
A Comparison of High Level European and U.S. Product Safety Requirements
by John Showell, Product Approvals Ltd. (p16)

Technologies
Low Cost of Ownership Lithography for High Brightness LED Manufacturing
by D. E. Anberg, Advanced Stepper Technology, A. M. Hawryluk, Ultratech Inc. (p22)

Optics
Practical LED Light Measurement
by Wolfgang Dähn, Bob Angelo, Gigahertz-Optik (p28)

Photometric Measurements in Modern LED Based Optical and Illumination Systems
by Juergen P. Weisshaar, Uta Vocke, opsira GmbH (p32)

Imaging Colorimetry: LED Device, Luminaire and Display
by Hubert Kostal, Radiant Imaging, Inc., Christina Boehme, SphereOptics GmbH (p36)

Thermal Management
When Designing with Power LEDs, Consider Their Real Thermal Resistance
by Dr. András Poppe, MicReD Division, Mentor Graphics Corp. (p42)

Silicones in LED’s for Heat Dissipation and Improved Light Output
by Chris Dawson, ACC Silicones (p46)

Drivers
Short Explanation of Critical Elements of a HB-LED Driver
by Rakesh Reddy, Cypress Semiconductor Corp. (p50)

LED professional – Patent Report (p52)

 


LpR15


LED Primary & Secondary Optics
Issue 15 | Sept / Oct 2009


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Application
Electrical Considerations of LED Bulbs
by Siegfried Luger, Arno Grabher-Meyer and Lukas Gorbach, LED professional (p14)

Optocouplers – A Critical Design Element in LED Bulbs
by Arno Grabher-Meyer, LED professional (p17)

Case Study – LED Solution Offers Advantages for Henkel Waste Water Plant
by Gordon Routledge, Dialight, Boris Viner, Consultant to Dialight (p20)

Technology
High Efficiency Reflective Mirror Type LED
by Shigeru Yamazaki, Alpha-One Electronics Ltd. (p24)

Optics
All Facts for Choosing LED Optics Correctly
by Tomi Kuntze, LEDIL Oy (p28)

Primary and Secondary Optic Materials - LED Luminaire Performance and Lifetime
by Thomas Brukilacchio, Ph.D., Innovations in Optics Inc (p32)
Shaping the Beam – the Role of Primary and Secondary Optics

by Rudi Hechfellner, Philips Lumileds; Dave Cohen, Fraen Optical Manufacturing Group (p40)
Save Space with Focus Tunable Lenses

by Mark Blum, MSc EE , Manuel Aschwanden, PhD , David Niederer, MSc ME, Optotune (p43)
Parameters to Consider for LED Optics Design

by Guido Campadelli, Fraen Corporation (p46)

LED professional – Patent Report (p48)

 


LpR14


Light Generation
Issue 14 | July / Aug 2009


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Application
Using RGB LEDs for Multi-Color Sign Applications
by Andreas Pohl, Avago Technologies (p12)

Effective Illumination for Internally-lit LED Signs
by M. Nisa Khan, Ph.D., LED Lighting Technologies (p16)

Interview with Navid Delassaee - Citizen Electronics
by Siegfried Luger, LED professional (p20)

Technology
Quantum Dots in LED Lighting: Improving Color Quality Without Sacrificing Efficiency
by Dr. Sridhar Sadasivan, Dr. Seth Coe-Sullivan, QD Vision, Inc. (p22)

Chip-Array-on-Ceramic LED: A Versatile Solution to High Performance LED Luminaires
by Dr. Gang Wang, Dr. Ian Collier, Dr. Ilkan Cokgor, Harik Su and Dr. Yi-qun Li, Intematix (p26)

Driver
Primary Side Regulation: Low Cost and High Efficiency Offline LED Driver
by Hangseok Choi, Fairchild Semiconductor (p30)

Thermal Derating of LEDs
by Steve Roberts, Recom (p32)

Thermal Management
Thermal Management of High Power LEDs
by Norbert P. Engelberts, Advanced Thermal Solutions (p36)

LED professional – Patent Report (p40)

 


LpR13


Thermal Management
Issue 13 | May / June 2009


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Characterization
Methodology for Thermal and Electrical Characterization of Large Area OLEDs
by A. Poppe et al, Budapest Univ. of Tech., Mentor Graphics, Philips Research Lab. (p15)

On the Standardization of Thermal Characterization of LEDs
by A. Poppe et al, Budapest Univ. of Tech., Mentor Graphics, Philips Research Lab. (p22)

Effect of Thermal Environment on LED Light Emission and Lifetime
by Cathy Biber, Ph.D., Biber Thermal Design, Ltd (p30)

Driver
Advantages of Integrating Power and Control for LED Lighting Applications
by Gavin Hesse and Rakesh Reddy, Cypress Semiconductor (p36)

Constant Current Regulators Support LED Lighting Solutions
by Tim Kaske, Paul Decloedt, ON Semiconductor (p40)

Thermal Management
Comparison of Passive and Active Cooling Effectiveness
by Che Cheung, Brandon Noska and Kim van der Heide, Nuventix (p42)
Thermal Management of High-Power LED Systems

by Maurice J. Marongiu, PhD, MJM Engineering Co. (p47)
Selecting the Right Thermal Interface Material for LED Applications

by Robert Kranz, Dr. Richard Hill, Laird Technologies, Inc (p50)
Thermal Management of Sophisticated LED Solutions

by Dr. Michel Kazempoor, PerkinElmer (p53)
Design Process for a Customer-Specific Ceramic Heat Sink
by Rüdiger Herrmann, CeramTec AG (p56)

LED professional – Patent Report (p60)

 


LpR12


LED Applications & Lighting Systems
Issue 12 | March / April 2009


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Project
LED Makeover, Yielding 90% Energy Saving
by Alexander Mueller, Future Lighting Solutions (p16)

Application
ALADIN – An Advanced Lighting System for Improved Health and Wellbeing
by Edith Maier, Walter Ritter, Univ. of Appl. Sciences Vorarlberg, and St. Gallen (p20)

A New White Light Solution Using an End-User Design Approach
by Gary Trott, Cree LED Lighting (p28)

Merging Technology and Biomorphic Design
by Christie Liu, BComm Marketing & Lumolar (p32)

Light 2.0: LEDs Create an Entirely New Generation of Lamps
by Andreas Biß, Sharp Microelectronics Europe (p34)

The Future of LED Illuminators
by John Popovich, Column8 (p38)

Thermal Management
Ceramic Simplifies Heat Dissipation
by Dr. Armin Veitl, Altair Engineering GmbH (p45)

 


lpr11_frontpage_sm2a.gif


LED Electronics
Issue 11 | Jan/ Feb 2009


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Characterization
Defining Lighting Class LEDs
by Ralph Buehler, Cree Inc. (p14)

Technology
Jet Dispensing Technology for Capillary Underfiller
by Anton Knupfer, Essemtec AG (p18)

Driver
Off-Line LED Control Circuit
by Tom Ribarich, International Rectifier (p21)

Current Uniformity for LED Display Drivers
by Frank Shih, Macroblock (p25)

Driving Compact Lamps Having High-Brightness LEDs
by Rafael A. Pinto et al., Federal University of Santa Marial (p29)

Basic Topologies for Driving LEDs
by Steve Winder, Supertex Inc. (p33)

 


LpR10


LED System Simulation and Testing
Issue 10 | Nov/Dec 2008


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Characterization
LED Lighting Technology Fundamentals and Measurement Guidelines
by M. Nisa Khan, Ph.D., LED Lighting Technologies (p14)

CIE 1964 Colorimetric Observer Chart Improves White Light Quality
by Peter Pachlar, Tridonic Atco Optoelectronics (p16)

White Light LEDs – Importance of Accepted Measurement Standards
by Dr. Thomas Nägele; Instrument Systems GmbH (p22)

The Role of Miniature Spectrometers for LED Measurements
by Jorge Macho, Ocean Optics (p26)

Technology
LED Encapsulant Epoxy Curing Optimization
by Bit Tie Chan, Avago Technologies (p30)

Optics
LED Source Modeling Method Evaluations
by Mark Jongewaard, LTI Optics and Kurt Wilcox, Ruud Lighting (p34)

Simulation and Optimization of Optical Systems
by Dr. Norbert Harendt, IB/E OPTICS and Christoph Gerhard, LINOS Photonics (p40)

Thermal Management
Simulating Device Thermal Performance Using PLECS
by Dr. John Schönberger, Plexim GmbH (p44)

Annual LED professional Review (LpR) Article Index 2008 (p46)

 


LpR09


LED Optics
Issue 09 | Sept/Oct 2008


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Application
Progress in LED and OLED Display Technologies
by M. Nisa Khan, Ph.D., LED Lighting Technologies (p14)

Optics
Microstructured Optics for LED Applications
by Arthur Davis, Reflexite Optical Solutions Business (p18)

Review of SMS Design Methods and Real World Applications
by Oliver Dross et al., Light Prescriptions Innovators LLC (p33)

Plastic Optics Enable LED Lighting Revolution
by Tomi Kuntze, LEDIL Oy (p41)

Driver
New Drive Circuit Supports Wide DC Input and Output Range
by Bernie Weir, ON Semiconductor (p44)

Simple and Accurate Constant Current Sensing for Non-Isolated LED Drivers
by John S. Lo Giudice, STMicroelectronics (p47)

Reliability Test of LED Driven by PWM Technique
by B. J. Huang et al., National Taiwan University (p49)

 


LpR08LED Solar Street Lighting

Issue 08 | July/Aug 2008


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Application
City of Kelowna Goes Green with Solar-Powered Area Lighting
by Anthony Tisot, Carmanah Technologies Corporation (p16)

Solar LED Street Lighting
by Steffen Block, OSRAM Opto Semiconductors GmbH, Gerhard Walch, Franz
Jungwirth, EPS soltec, and Arno Grabher-Meyer, LED professional (p18)

Characterization
Integrating Sphere Applications for LED and Solar Cell Measurements
by Sid Rane, SphereOptics (p24)

NIST/DoE: Standards Set for Energy-Conserving LED Lighting (p27)

Technology
Nano-Patterned Sapphire Substrates Improve Performance of GaN-LEDs
by Haiyong Gao, et al, Semiconductor Lighting Technology Res. and Dev. Center (p28)

LED Efficacy: A Matter of Die Structures
by Arno Grabher-Meyer , LED professional (p29)

Increasing Light Extraction Efficiency of GaN LED Chips
by Song, Mi Jeong, Ph.D.; Leniachine, V; Jeong Wook, Lee, Ph.D.; Samsung Research (p34)

A Status on Solar Cell Technology
by Anil Sethi, Flisom AG (p41)

Driver
Solar Driven LED Systems
by Peter B. Green, International Rectifier (p44)

High Efficiency Power Supply for LED Street Lighting Illumination
by Luca Salati, STMicroelectronics (p48)

 


LpR07


International Fairs, Synthetic Jet Technology,
Photonic-Lattice Technology
Issue 07 | May/June 2008


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Application
Forethoughts on LED Breakouts in Signage
by M. Nisa Khan, Ph.D., LED Lighting Technologies (p16)

Integrated, Exergy-Efficient Office Solution Requires LED General Lighting
by Dr. W. Werner, Dipl. Ing. F. Theßeling, Prof. Dr. H. Leibundgut, ETH Zürich (p18)

Technology

Photonic-Lattice Technology
by Christian Hoepfner, Luminus Devices (p20)

Evolutionary LED Packaging for Increased Flux Density
by Jason Posselt, LedEngin Inc. (p24)

Driver

Parallel LED Luminous Flux Variation
by Ed Wenzel, STMicroelectronics (p28)

Low Noise in LED Driver Circuits
by Roger Alm, Melexis (p30)

Designing with High Efficient LED Driver for LED Lighting
by Chih-Yu Wu, Macroblock (p33)

Comparison Between Continuous (DC) and PWM LED Driving Modes
by Laurent Massol, Arno Grabher-Meyer and Siegfried Luger, LED professional (p34)

Thermal Management

An In-Depth Look at Active Cooling Thermal Management: Synthetic Jet Technology
by Mick Wilcox, Nuventix (p36)

 


LpR06


Light + Building, Special Edition
Issue 06 | Mar/Apr 2008


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Application
LED-Systems in Shoplighting by Andreas Siegmund, OSRAM GmbH
Interview with Jason Bruges - Jason Bruges Studio by Siegfried Luger, LED professional

Interview with Klaus Vamberszky - Zumtobel Lighting by Siegfried Luger, LED professional

Technology

Discontent Led to Lumiramic Phosphor Technology by Steve Landau, Philips Lumileds
Improvements in Solid State Lighting III-V Semiconductor Production by Dr. Rainer Beccard, AIXTRON AG

Optic

Optics design for Colour Mixing LEDs by Dr. Andreas Timinger, OEC AG

Driver

High Efficiency 200W LED Ballast by Dr. Michael Weirich, Fairchild Semiconductor GmbH

Driving RGB High Power LEDs by Ulrich Kirchenberger and Pavel Koutensky, STMicroelectronics

High-Brightness-LED Control by Peter Green, International Rectifier

Module
Improved LED Modules for General Lighting Market by Christoph Cox, VS-Optoelectronic

 


LpR05


Colored LED Systems

Issue 05 | Jan/Feb 2008


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Application
High Tech for Time Square’s New Years Eve Ball by Jason Harris Koonce, e:cue Lighting Control

Characterization

Visual Perception Issues of LED Applications by Ingrid M.L. Vogels, Pieter J.H. Seuntiens and Dragan Sekulovski, Philips Research Europe

Measurement of LEDs by Yoshi Ohno, Cameron Miller, and Yuqin Zong, National Institute of Standards and Technology

Technology

High Performance Multi-Color LEDs in Chip-On-Board Technology by Oliver Kückmann and Jörg Hannig, PerkinElmer Elcos GmbH

White Light LED Technology with Increased Efficiency and Variable CCT by Erwin Baumgartner, Lumitech GmbH

LED Binning: A Process to Watch by Joe Mazzochette, Lamina

Methodology

TRIZ Introduction by Siegfried Luger, LED professional

 


LpR04


LED Thermal Management

Issue 04 | Nov/Dec 2007


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Applications
Thermal Management for LED Luminaires, by Dr. Keith Bahde, Gallium Lighting Systems

Technologies

Challenges Still Linger for Mainstream White LEDs, by Dr. Nisa Khan, Ph.D., Optpelectronic & SSL Technologist

Drivers & Controls

LED Lighting Control Systems: The Next Generation of Lighting, by Abhay Gupta, Echelon Corporation   

Thermal Management

Thermal Management in High Power LED Systems, by Paul Scheidt, CREE

Thermal Management of LED Technology in Applications, by Rainer Huber, Osram Opto Semiconductor GmbH   

High Power LED Thermal  Modeling and Effect of Thermal Interface Materials, by Oon Siang Ling, Avago Technologies

Direct Copper Bonded Ceramic Substrates for Use With Power LEDs, by Dr. Jürgen Schulz-Harder and Alfred Dehmel, Electrovac curamik

Synthetic Jets for Active Cooling of LEDs, by Mick Wilcox and Lee Jones, Nuventix Inc.

Insulated Metal Substrate for Maximum Brightness and Lifetime, by Nico Bruijnis, The Bergquist Company

Thermal Simulations for LED Applications, by Dr. Johannes Adam, Flomerics Ltd.

 


LpR03


LED Technologies & LED Drivers

Issue 03 | Sept/Oct 2007


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Applications
LED Luminaries for General Illumination, by Dr. Wilfried Pohl, Bartenbach Lichtlabor
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Technologies

LED Data Sheet comparison, by Arno Grabher-Meyer, LED professional

Light Extraction Boosts Efficiency of Vertical Light Emitting Diodes on Metal Alloy Substrate, by SemiLEDs Corp

Drivers

How linear LED driver IC’s can make it irresistible to replace resistor biasing, by Joachim Glaeser, Hakan Yilmazer, Infineon Technologies AG

Next Generation LED Area Lighting, by Bernie Weir and Frank Cathell, ON Semiconductor

Innovative Analog Control Technologies for Mainstream LED Lighting Market, by Andy Aaron and Jeanette
Jackson, Light-Based Technologies Inc.

Solving high-voltage off-line HB-LED constant-current control-circuit issues, by Giovanni Carraro, International Rectifier

Sensors

Improved LED systems with true color sensors,  by DI (FH) Fredrik Hailer, MAZeT GmbH

Trends of Engineering System Evolution

Ideality, by Siegfried Luger, LED professional

 


LpR02


LED Driver

Issue 02 | June/July 2007


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Content:
- Editorial, S. Luger
- Product & Research News
- Recent developments in white phosphors; R.J. Arthley
- Driving LEDs - A real challenge, A. Grabher-Meyer
- Colour compensation, T. Schielke
- Adding intelligence to LED lighting systems, S. Bowling
- What's the favourite colour?, S. Bramble
- Low cost power supply for High Power LED application, M. Weirich
- Next generation MR16 LED lamps powered by driver IC, D.F. Weng & M. Nalbant
- LED lamps require power conversion ICs to meet EMC and quality standards, S. Fimiani    
- Trends of engineering system evolution: S-curve analysis, S. Luger

 


White LEDs

Issue 01 | Mar/Apr 2007


Full archive access: Click Here

 

Content:
- SSC upgrades design and improves brightness of Acriche by 20% to 48 lm/W
- First Domponents presents the industry's brightest single-chip LED with 250 lumens
- New EZBright 700 power chip broadens Cree's high performance chip platform
- New super bright LED light source from Osram Opto Semiconductor
- Philips Lumileds shatters 350 mA performance records with 115 lm/W LED
- Panasonic develops White Color Power LEDs by employing GaN Substrates
- Rensselaer researchers create world's first ideal anti-reflection coating
- Philips LED technology solves efficiendy losses at high drive currents
- LEDs for use in downlights
- White LEDs and Modules for General Lighting
- Lifetime of White LEDs
- Efficacy and colour impression of White LEDs
- White LED Manufacturers
- Trends of Engineering System Evolution

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