LED professional Review (LpR)
Thermal Management

May / June 2009

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 professional Review (LpR)
LED Applications & Lighting Systems

March / April 2009

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 professional Review (LpR)
LED Electronics
Fluorescent Lamp Driver Powers LEDs
Compact Lamp DC/DC Converter
Defining Lighting Class LEDs

January / February 2009

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 professional Review (LpR)
LED System Simulation and Testing
Measurement Standards
LED Source Modeling
Simulating Device Thermal Performance

November / December 2008

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 professional Review (LpR)
Microstructured Optics
SMS Design Methods
Plastic Optics
LED Driver Circuits
Display Report

September / October 2008

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 professional Review (LpR)
Solar LED Lighting
Street Lighting
PV-Cell Technologies
Light Extraction Efficiency
LED Solar Drivers

July / August 2008

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)

LED professional Review (LpR)
International Fairs
Synthetic Jet Technology
Photonic-Lattice Technology

May / June 2008                                                                                               

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)

LED professional Review (LpR)
LpR - Light + Building, Special Edition

March / April 2008                                                                                               

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

LED professional Review (LpR)
LpR - Colored LED-Systems

January / February 2008                                                                                               

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 professional Review (LpR)
LpR - Thermal Management

November / December 2007

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 professional Review (LpR)
LpR - LED technologies & LED drivers

September 2007

LED professional Review (LpR)
LpR - LED Driver

June 2007

 





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

LED professional Review (LpR)
LpR - White LEDs

March 2007

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