White Papers

White Paper | Technology | Sep 04, 2013

Imec and Veeco Announce Collaboration in GaN-on-Si Devices for LED and Power Electronics Applications

Goal of imec's multi-partner GaN-on-Si research and development program is the development of GaN LED on 200 mm silicon substrates with CMOS-compatible infrastructure Nanoelectronics research centre imec of Belgium and Veeco Instruments Inc. (Nasdaq:VECO) are collaborating on a project aimed at lowering the cost of producing gallium nitride on silicon (GaN-on-Si) -based power devices and LEDs. Read more »

White Paper | Technology | Aug 28, 2013

PI's New Reference Design, DER-350 for PAR38 LED Spotlight, Promises Excellent Dimming Performance with TRIAC Dimmers

Power Integration DER350 schematic (top) and the populated circuit board photograph (left: Top View; right: Bottom View) Power Integrations, the leader in high-efficiency, high-reliability LED driver ICs, today announced a reference design for a dimmable PAR38 spotlight, developed in collaboration with Cree, Inc., a leading LED lighting company. The new reference design, described in DER-350, uses Power Integrations’ new LYT4317E, a member of the company’s LYTSwitchTM-4 family of single-stage drivers, along with Cree’s MT-G2 EasyWhite® LEDs. Read more »

White Paper | IP, Reports & Roadmaps | Aug 26, 2013

Sharp and OSRAM Enter into LED and Laser Diode Patent Cross-Licensing Agreement

Sharp Corporation (head office: Osaka City, Osaka Prefecture; President: Kozo Takahashi; below "Sharp") and OSRAM GmbH (head office: Munich, Germany; CEO: Wolfgang Dehen; below "OSRAM") have entered into a patent cross-licensing agreement covering LEDs (light-emitting diodes) and laser diodes. Read more »

White Paper | Technology | Jul 31, 2013

Rensselaer Researchers Identify Cause of LED “Efficiency Droop”

Voltage at the onset of high injection and voltage at the onset of the efficiency droop (i.e., the peak-efficiency point) as a function of temperature Rensselaer Polytechnic Institute researchers have identified the mechanism behind a plague of LED light bulbs: a flaw called “efficiency droop” that causes LEDs to lose up to 20 percent of their efficiency as they are subjected to greater electrical currents. Efficiency droop, first reported in 1999, has been a key obstacle in the development of LED lighting for situations, like household lighting, that call for economical sources of versatile and bright light. Read more »

White Paper | IP, Reports & Roadmaps | Jul 30, 2013

DoE Publishes CALiPER Snapshot Report on Outdoor Area Lighting

While most products perform well above the DLC QPL efficacy and output criteria, in the roadway category, where the incumbent technology is predominantly HPS, few LED products listed by LED Lighting Facts appear to be suitable alternatives to nominally 400 W luminaires The U.S. Department of Energy's CALiPER program has released a Snapshot Report on outdoor area lighting, which utilizes the LED Lighting Facts® program's extensive product database to help industry stakeholders understand the current state and trajectory of the market for LED outdoor area and roadway, parking garage, and canopy luminaires. Read more »

Fundings & Projects | White Paper | Jul 18, 2013

Supported Project “cyCESH” for Cost‐Efficient Printed OLEDs

Schematic structure of an OLED (Credits: cynora) On June 1, 2013, BMBF launched the project cyCESH involving cynora GmbH, Novaled AG and the University of Regensburg with the workgroup of Prof. Dr. Hartmut Yersin. The project is set to run for a duration of three years with a total funding of 6.1 million euros. The research of new soluble materials for the inexpensive production of organic light emitting diodes (Organic Light‐Emitting Diodes ‐ OLEDs) and the production of OLED devices with high efficiency are the main focus of the project. Read more »

White Paper | Jul 02, 2013

Alternative Calculation Method Will Improve Thermal Analysis of LEDs - by Michiel Krüger, Ph.D. - Philips Lumileds

Figure 1: LED Definition An alternative method to estimate the amount of heat generated by LEDs will help increase the accuracy and streamline the thermal analysis of white LEDs. Up until now, thermal analysis of white LEDs has been an imperfect science. Too often LED lamp and luminaire manufacturers rely on insufficient, inaccurate or intangible data to determine the thermal performance of the LEDs in their applications, and, as a result, may over-engineer their heat sink design. Read more »

White Paper | Standardization & Regulation | Jun 26, 2013

Zhaga Announces Several Updates and Reports About Activities in their Latest June Newsletter

June has been a very busy month for Zhaga, with the consortium’s first meeting in China combined with an open session for government officials and representatives from China’s lighting industry. Meanwhile, the first products have now been certified for Zhaga interface specification Books 4, 7 and 8, while Zhaga has signed a liaison with the Global Lighting Association. Read more »

White Paper | Standardization & Regulation | Jun 26, 2013

Zhaga Announces Several Updates and Reports About Activities in their Latest June Newsletter

June has been a very busy month for Zhaga, with the consortium’s first meeting in China combined with an open session for government officials and representatives from China’s lighting industry. Meanwhile, the first products have now been certified for Zhaga interface specification Books 4, 7 and 8, while Zhaga has signed a liaison with the Global Lighting Association. Read more »

Fundings & Projects | White Paper | Jun 12, 2013

Laser Processing Enables Selective Layer Modification of Encapsulated OLEDs for Signage Applications

4JET Technologies GmbH introduces a new laser process for customization and optimizing of organic LEDs at LOPE-C 2013. The new technology is a joint development with Novaled AG. Read more »

White Paper | Technology | May 22, 2013

SCHOTT Developers Manufacture Ceramics for Use in Advanced Lens Systems and LED Technology

SCHOTT developers have produced transparent and translucent ceramics that pave the way for advanced photographic and other types of imaging systems as well as highly efficient LED systems. Photo: SCHOTT Transparent and translucent ceramics are on the verge of being put to industrial use as new optical materials that offer great potential. As part of the publicly funded research project OptokeraMat, SCHOTT Research and Development has laid important foundations on manufacturing them in a reproducible manner. Read more »

White Paper | Standardization & Regulation | Apr 22, 2013

Model Specification for Adaptive Control and Remote Monitoring of LED Roadway Luminaires, V1.0

The DOE Municipal Solid-State Street Lighting Consortium's Model Specification for Adaptive Control and Remote Monitoring of LED Roadway Luminaires is a tool designed to help cities, utilities, and other local agencies accelerate their adoption of systems that can further reduce the energy and maintenance costs of operating their streetlights. Read more »

White Paper | Standardization & Regulation | Apr 22, 2013

Model Specification for Adaptive Control and Remote Monitoring of LED Roadway Luminaires, V1.0

The DOE Municipal Solid-State Street Lighting Consortium's Model Specification for Adaptive Control and Remote Monitoring of LED Roadway Luminaires is a tool designed to help cities, utilities, and other local agencies accelerate their adoption of systems that can further reduce the energy and maintenance costs of operating their streetlights. Read more »

Fundings & Projects | White Paper | Feb 27, 2013

NEWLED Research Project Led by the University of Dundee Aims to Revolutionize the Way the World Is Lit

"Bulb is over" was a provoking statement on LpS 2013 - NEWLED could make that reality The way the world is lit up could be revolutionised by a new European-wide research project being lead by the University of Dundee. The 11.8million Euros NEWLED project aims to develop a new generation of white light-emitting LED lights, which would be much more efficient than existing light bulbs. Read more »

White Paper | Technology | Feb 27, 2013

PI's New LED-Downlight Reference Design Achieves High-Performance Dimming While Further Reducing Component Count

PI's new reference design optionally includes active pre-load, for improved dimming, and thermal fold back circuits Power Integrations, a world leader in high-efficiency, high-reliability LED driver ICs, today announced RDR-347, an LED-downlight reference design. The new circuit demonstrates the capabilities of the recently launched LYTSwitch™ IC family, which offers the industry’s best high-end dimming performance from a single-stage LED driver– together with all the associated efficiency, space and cost benefits that the single-stage approach brings. Read more »

White Paper | Standardization & Regulation | Feb 26, 2013

Zhaga Consortium Publishes Book 2 Interface Specification for LED Light Engines

Some examples for Zhaga compliant products Zhaga has published its second interface specification, as part of its mission to enable the interchangeability of LED light sources. Products carrying the Zhaga logo are already available from various manufacturers. Read more »

White Paper | Standardization & Regulation | Feb 26, 2013

Zhaga Consortium Publishes Book 2 Interface Specification for LED Light Engines

Some examples for Zhaga compliant products Zhaga has published its second interface specification, as part of its mission to enable the interchangeability of LED light sources. Products carrying the Zhaga logo are already available from various manufacturers. Read more »

White Paper | Technology | Feb 14, 2013

Cree Sets New R&D Performance Record with 276 Lumen-Per-Watt Power LED

Cree, Inc. delivers another industry first with a barrier-breaking 276 lumen-per-watt white R&D power LED. This significant milestone exceeds Cree’s previous R&D industry record of 254 lumens per watt and demonstrates Cree’s continued commitment to innovate and accelerate the adoption of LED lighting. Read more »

White Paper | IP, Reports & Roadmaps | Feb 05, 2013

MP Lighting Got Patent for Active Cooling System for LED Lighting Granted

Depending on the placement of the NTC thermistor array in the general structure of LED fixture there are at least three versions possible MP Lighting, a designer and manufacturer of innovative LED fixtures, announced today it has been completed the Patent portfolio relating to its Active Cooling System (ACS) for LED lighting industry. Read more »

White Paper | IP, Reports & Roadmaps | Feb 01, 2013

New Patent Aims to Improve Light Distribution of Tubular Lamps and Luminaires

Numerous LEDs with dedicated lightguides provide a even and controlled light distribution Appropriate even light distribution in LED replacement tubes respectively tubular LED lamps and luminaires is still one of the weak points of LED lighting. Recently the interesting patent application "Light distribution using tapered waveguides in LED-based tubular lamps as replacements of linear fluorescent lamps" covering that topic became a granted patent, with patent number US8,348,467 B2. Read more »

White Paper | Technology | Jan 30, 2013

Tamura and Koha Demonstrate White LED Using Gallium Oxide at Lighting Japan 2013

Gallium oxide based white LEDs that use 0.3 x 0.3mm (left) and 2 x 2mm (right) blue LED chips, respectively Tamura Corp and Koha Co Ltd developed a white LED using gallium oxide (β-type Ga2O3) and exhibited it at Lighting Japan 2013, a trade show of lighting devices, which took place from Jan 16 to 18, 2013, in Tokyo. Read more »

White Paper | Technology | Jan 30, 2013

New Options for Transparent Contact Electrodes

Microstructures of alternative TCE materials: e, Scanning electron microscopy image of a Cu grid with a line width of 200 nm (ref. 41). f, Scanning electron microscopy image of an Ag nanowire network (mass density 93 mg m−2)77. g, Transmission electron microscopy cross-sections of graphene layer stacks (bilayer, triple and multiple layers). h, Optical microscope picture of CVD-grown graphene, transferred to a 300-nm-thick SiO2 layer85. Note the graphene grain sizes of around 10 μm and the ripples (inset) in the graphene layers Found in flat screens, solar modules, or in new organic light-emitting diode (LED) displays, transparent electrodes have become ubiquitous. Typically, they consist of metal oxides like In2O3, SnO2, ZnO and TiO2 . Read more »

White Paper | Standardization & Regulation | Jan 10, 2013

SEMI's LED Standards Committee HB-LED Standard Published

After the formation of the high-brightness light-emitting diode (HB-LED) Standards Committee in November 2010 the committee was working hard on HB standards. The committee is happy to announce that it now has approved its first standard, SEMI HB1: Specifications for Sapphire Wafers Intended for Use for Manufacturing High Brightness-Light Emitting Diode Devices. Developed by the HB-LED Wafer Task Force, SEMI HB1 defines and specifies the physical geometry of 150 mm diameter sapphire wafers used in HB-LED manufacturing. HB1 covers dimensional, wafer preparation, and crystallographic orientation characteristics, as well as the appropriate measurement methods. The document was approved by the HB-LED Committee during the North America Fall 2012 meetings, recently completed procedural review and will be published soon. Read more »

White Paper | Standardization & Regulation | Jan 10, 2013

SEMI's LED Standards Committee HB-LED Standard Published

After the formation of the high-brightness light-emitting diode (HB-LED) Standards Committee in November 2010 the committee was working hard on HB standards. The committee is happy to announce that it now has approved its first standard, SEMI HB1: Specifications for Sapphire Wafers Intended for Use for Manufacturing High Brightness-Light Emitting Diode Devices. Developed by the HB-LED Wafer Task Force, SEMI HB1 defines and specifies the physical geometry of 150 mm diameter sapphire wafers used in HB-LED manufacturing. HB1 covers dimensional, wafer preparation, and crystallographic orientation characteristics, as well as the appropriate measurement methods. The document was approved by the HB-LED Committee during the North America Fall 2012 meetings, recently completed procedural review and will be published soon. Read more »

White Paper | Technology | Jan 09, 2013

Scientists Mimic Fireflies to Make Brighter LEDs

The misfit scales (bottom right) found on the lantern of the Photuris firefly (top right) are the inspiration for a GaN LED, coated with a "factory-roof" pattern (left) that increased light extraction by more than 50 percent The nighttime twinkling of fireflies has inspired scientists to modify a light-emitting diode (LED) so it is more than one and a half times as efficient as the original. Researchers from Belgium, France, and Canada studied the internal structure of firefly lanterns, the organs on the bioluminescent insects’ abdomens that flash to attract mates. The scientists identified an unexpected pattern of jagged scales that enhanced the lanterns’ glow, and applied that knowledge to LED design to create an LED overlayer that mimicked the natural structure. The overlayer, which increased LED light extraction by up to 55 percent, could be easily tailored to existing diode designs to help humans light up the night while using less energy. The work is published in a pair of papers today in the Optical Society’s (OSA) open-access journal Optics Express. Read more »

White Paper | IP, Reports & Roadmaps | Jan 03, 2013

DoE Releases CALiPER 2012 Year in Review Report

The CALiPER 2012 Year in Review report contains several graphs like this one showing overall test results since 2006 The CALiPER program has tested more than 500 products since its inception in 2006, revealing a variety of performance trends, holding manufacturers accountable for claims, and identifying concerns that limit adoption. Over the past six years, the LED marketplace has changed substantially; previously relegated to niche status, LED products are now a viable alternative in many product categories and market share is expected to grow rapidly. Starting in 2012, Summary Reports focus on a single product type or application. Read more »

White Paper | Technology | Dec 19, 2012

New LED-Lighting Driver Design from Power Integrations Delivers Long Lifetime and High Efficiency

Power Integrations reference design DER-340 is the first choice when a long lifetime is required Power Integrations, the world leader in high-efficiency, high-reliability LED-driver ICs, today announced a new long-lifetime LED-driver reference design. DER-340 describes a wide-range (90 VAC to 308 VAC), high-power-factor LED-driver power supply that is suitable for high-bay, exterior and street-lighting applications. Read more »

White Paper | IP, Reports & Roadmaps | Dec 11, 2012

Research and Markets Offers LED Lighting - Key Patent Analysis: Remote Phosphor

LEDs, which are semi-conductor devices that convert electricity into light by the properties of compound semi-conductors, have higher energy efficiency and cost less for replacement due to longer lifetimes than existing lighting systems, and have high resistance to impact or vibration. Furthermore, LEDs have advantages in terms of energy saving and protection of the environment since they do not use toxic substances such as mercury, which give an impetus to their market entry as new lighting systems to replace existing lighting systems. Read more »

White Paper | Technology | Dec 05, 2012

Power Integrations Sets New Standard for Power Density in LED-Driver Reference Design for T8-Tube Replacement

PI's new design delivers small size, high efficiency and long-lifetime for retrofit tube applications  Power Integrations, the leader in high-voltage integrated circuits for energy-efficient power conversion, today announced two new reference designs describing high-efficiency, non-isolated, high-power-factor (PF) LED drivers for T8 tubes. The designs feature low component count and leverage simple magnetics and single-sided boards yielding industry-leading power densities of 14.2 W/in³. Based on the LNK460KG LED driver from Power Integrations’ LinkSwitch-PL family of ICs, the circuits detailed in DER-337 (high-line) and DER-345 (low-line) use single-stage non-isolated topologies which result in a profile of only 8 mm - small enough to be mounted behind the LEDs in the T8 tube. Read more »

White Paper | Technology | Nov 26, 2012

BluGlass Demonstrates Low Temperature Grown n-GaN Films that Meet Industry Benchmarks

Australian clean technology innovator, BluGlass Limited announced today that it is now producing n-type gallium nitride (GaN) films with demonstrated industry equivalent performance properties using its breakthrough low temperature Remote Plasma Chemical Vapour Deposition (RPCVD) technology when grown on top of MOCVD GaN templates. Read more »

FEATURED

Epoxy Features Very Low Coefficient of Thermal Expansion

Epoxy Features Very Low Coefficient of Thermal Expansion Master Bond EP30LTE-2 has been developed for joining dissimilar substrates exposed to thermally or mechanically induced stresses. It can be used for sealing, coating and encapsulating, especially for small to medium sized castings where a very low coefficient of thermal expansion (CTE) is required. Read more »

FEATURED

New BJB LED Connector for Linear LED Modules: Book 21 Compliant

New BJB LED Connector for Linear LED Modules: Book 21 Compliant Lampholders were standard in older, traditional lighting systems. Modern LED fixtures that utilize non-replaceable LEDs create several assembly and field-replacement disadvantages. Zhaga Book 21 addresses these shortcomings by standardizing linear 'socketable' LED modules. In accordance with Book ... Read more »

FEATURED

EzyLED™ Now Stocked at Digi-Key

EzyLED™ Now Stocked at Digi-Key American Bright, a global LED lighting solutions manufacturer, announced a series of EzyLED 3030. American Bright's EzyLED™ is a proprietary LED device with a built-in IC. This patented design drastically reduces the need for additional circuitry and other on-board components making it the ideal ... Read more »

FEATURED

Cree Expands Design Possibilities for Architectural Lighting with the Worldwide Proven CLQ6A LED

Cree Expands Design Possibilities for Architectural Lighting with the Worldwide Proven CLQ6A LED These SMD LEDs are packaged in an industry standard PLCC8 package. These high performance 4 color SMT LEDs are designed to work in a wide range of applications. A wide viewing angle and high brightness make these LEDs suitable for signage applications. Read more »

FEATURED

Measuring the Oxygen Content of Blood with LEDs

Measuring the Oxygen Content of Blood with LEDs Pulse oximetry is a non-invasive method for determining haemoglobin (Hb) saturation through oxygen in the blood and heart frequency. It uses the fact that oxygen-rich and oxygen-poor haemoglobin absorb red and infrared light differently. In order to measure the oxygen content reliably, LEDs with ... Read more »

EDITORIAL

LpS/TiL 2019 - Europe's Foremost Lighting Conference Discussed Latest Lighting Trends

LpS/TiL 2019 - Europe's Foremost Lighting Conference Discussed Latest Lighting Trends Last week saw the co-hosted LED professional Symposium +Expo (LpS), Trends in Lighting Forum &Show (TiL) and for the first time the Digital Addressable Lighting Interface (DALI) Summit return to Bregenz, Austria. The three international conference and exhibition events were carefully curated to ... Read more »

EDITORIAL

The 2019 LpS & TiL Award Winners: Celebrating the Complete Spectrum of Light

The 2019 LpS & TiL Award Winners: Celebrating the Complete Spectrum of Light It is a great pleasure for the LpS and TiL organization committee to announce the award winners for 2019. For the second time in a row, after the traditional cruise on the lake from Bregenz to Lindau, the gala dinner at the Eilgut Halle has proven to being a great place for the LpS & TiL award ... Read more »

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