LED professional Review (LpR) - A Must for Leaders

Free Subscription

Get Your FREE LED professional Review (LpR) - Test Issue

• Receive your FREE version by e-mail (download link)
• Receive your FREE LED professional Newsletter (LpN) with latest research & industry news
• You may cancel it at any time

 

 

 

 

 

---

 

 

Archive (for full digital subscribers only)

 

LpR 29 | Jan/Feb 2012

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

Full archive access: Click Here

Printed magazine order for this issue - Click Here

 

 

 

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)

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

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

Full archive access: Click Here

Printed magazine order for this issue - Click Here

 

 

 

 

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)

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)

 

LpR 28 | Nov/Dec 2011

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

Full archive access: Click Here

Printed magazine order for this issue - Click Here

 

 

 

 

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

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

Full archive access: Click Here

Printed magazine order for this issue - Click Here

 

 

 

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

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

Full archive access: Click Here

Printed magazine order for this issue - Click Here

 

 

 

 

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

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

Full archive access: Click Here

Printed magazine order for this issue - Click Here

 

 

 

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

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

Full archive access: Click Here

Printed magazine order for this issue - Click Here

 

 

 

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

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

 

Full archive access: Click Here

Printed magazine order for this issue - Click Here

 

 

 

 

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

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

Full archive access: Click Here

Printed magazine order for this issue - Click Here

 

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

Full archive access: Click Here

Printed magazine order for this issue - Click Here

 

 

 

 

 

 

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)

 

 

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

Full archive access: Click Here

 

 

 

 

 

 

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)

 

LED Light Generation

LpR 19 | May / June 2010

Full archive access: Click Here

 

 

 

 

 

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)

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

Full archive access: Click Here

 

 

 

 

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)

 

LED Thermal Management
Issue 17 | Jan / Feb 2010

Full archive access: Click Here

 

 

 

 

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)

 

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

Full archive access: Click Here

 

 

 

 

 

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)

 

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

Full archive access: Click Here

 

 

 

 

 

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)

 

Light Generation
Issue 14 | July / Aug 2009

Full archive access: Click Here

 

 

 

 

 

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)

 

Thermal Management
Issue 13 | May / June 2009

Full archive access: Click Here

 

 

 

 

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)

 

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

Full archive access: Click Here

 

 

 

 

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)

 

LED Electronics
Issue 11 | Jan/ Feb 2009

Full archive access: Click Here

 

 

 

 

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)

 

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

Full archive access: Click Here

 

 

 

 

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)

 

LED Optics
Issue 09 | Sept/Oct 2008

Full archive access: Click Here

 

 

 

 

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)

 

LED Solar Street Lighting
Issue 08 | July/Aug 2008

Full archive access: Click Here

 

 

 

 

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)

 

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

Full archive access: Click Here

 

 

 

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)

 

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

Full archive access: Click Here

 

 

 

 

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

 

Colored LED Systems
Issue 05 | Jan/Feb 2008

Full archive access: Click Here

 

 

 

 

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

 

LED Thermal Management
Issue 04 | Nov/Dec 2007

Full archive access: Click Here

 

 

 

 

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.

 

LED Technologies & LED Drivers
Issue 03 | Sept/Oct 2007

Full archive access: Click Here

 

 

 

 

Applications
LED Luminaries for General Illumination, by Dr. Wilfried Pohl, Bartenbach Lichtlabor
<!--[if !supportLineBreakNewLine]--><!--[endif]-->
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

 

LED Driver
Issue 02 | June/July 2007

Full archive access: Click Here

 

 

 

 

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