White Paper | Technology | Aug 30, 2012

Power Integrations Unveils A19 LED Driver Reference Design Targeting 100 W Incandescent Bulb Replacements

Schematic and populated circuit board for Power Integrations' reference design for 100W A19 replacement bulbs Power Integrations (Nasdaq:POWI), maker of the most efficient, longest-lasting off-line LED driver ICs, today announced DER-323, a reference design for an 18W, 88%-efficient, non-isolated A19 LED driver based on LNK460VG, a low-profile IC from the company's LinkSwitch™-PL family. The design is suitable for a 100 W incandescent bulb replacement and is optimized for low-line (90 VAC to 135 VAC) operation. The circuit is low-cost, requiring only a simple single-sided board and 25 components. No potting is necessary and the transformer is replaced by a low-cost inductor. Read more »

White Paper | Technology | Aug 02, 2012

SWITCH CEO Reveals Best-Kept Secret in LED Lighting

Switch Lighting offers the full range of A lamps up to an 100W equivalent lamp with approximately 1700lm Tracy Bilbrough, CEO of SWITCH Lighting™, the first company to offer a full family of LED replacements to the incandescent A-Lamp, today revealed for the first time key details behind the company’s core technology to a group of industry insiders during a speech at the LED Show. Bilbrough also introduced SWITCH’s new LQD Cooling System™. Read more »

Fundings + Projects | White Paper | Aug 01, 2012

Researchers Study How to Avoid Charge Traps in Plastic Electronics

Visualization of an electron traveling through a potential field with charge traps in plastic electronics. (Click image for high-resolution version. Credit: Gert-Jan Wetzelaer, University of Groningen) Plastic electronics hold the promise of cheap, mass-produced devices. But plastic semiconductors have an important flaw: the electronic current is influenced by “charge traps” in the material. These traps, which have a negative impact on plastic light-emitting diodes and solar cells, are poorly understood. Read more »

White Paper | Technology | Jul 31, 2012

Cree Announces 170 Lumen-Per-Watt LED Light Bulb Demonstrator

Less than one year after showcasing the 152 lumens-per-watt concept LED bulb, Cree, Inc. (Nasdaq: CREE) delivers a new performance benchmark with the 170 lumens-per-watt (LPW) prototype LED light bulb. The innovations behind the high-performance 170 LPW LED bulb are enabling significantly higher efficacy and lower cost for Cree’s luminaire portfolio and demonstrate Cree’s continued commitment to accelerate the adoption of LED lighting by addressing initial cost and payback – key barriers to widespread LED lighting adoption. Read more »

White Paper | IP, Reports & Roadmaps | Mar 28, 2012

DOE Releases GATEWAY Report on Museum LED Retrofit Lighting

Track luminaires installed in the J. Paul Getty Museum in Malibu with Cree 12W PAR38 LED replacement lamps The U.S. Department of Energy (DOE) has published the final evaluation report from a retrofit of track lighting used to illuminate a special photography exhibition at the J. Paul Getty Museum in Malibu, California. During the demonstration, 12W LED PAR 38 lamps replaced 60W halogen PAR 38 30° flood lamps on a one-for-one basis across three adjacent gallery spaces. Read more »

White Paper | Technology | Mar 27, 2012

Diamond Brightens the Performance of Electronic Devices and LEDs

While diamonds may be a girl’s best friend, they’re also well-loved by scientists working to enhance the performance of electronic devices Two new studies performed at the U.S. Department of Energy’s Argonne National Laboratory have revealed a new pathway for materials scientists to use previously unexplored properties of nanocrystalline-diamond thin films. While the properties of diamond thin films are relatively well-understood, the new discovery could dramatically improve the performance of certain types of integrated circuits by reducing their "thermal budget." Read more »

White Paper | IP, Reports & Roadmaps | Mar 26, 2012

Research and Markets Releases "Smart Lighting 2012" Report

The Research and Markets report provides an analysis of the worldwide smart lighting market and builds on NanoMarkets’ extensive six-year experience of analyzing the solid-state lighting industry. The report shows how new value is being created in the lighting market by adding enhanced electronics and intelligent luminaires and how such product strategies will be able to build on the massive trend towards introducing CFLs, LEDs, OLEDs and other forms of energy efficient lighting. Read more »

White Paper | Technology | Mar 07, 2012

Flexible Organic LED (OLED) Lighting Reaches High Energy Efficiency

Solvay, Holst Centre and several other partners demonstrate flexible 69cm² Organic LED (OLED) lighting tiles with an efficiency of 30 lm/Watt Chemical group Solvay and Holst Centre have demonstrated high efficiency flexible Organic Light Emitting Diodes (OLED) lighting tiles with a surface area of 69cm². These large-area demonstrators contain several layers deposited by solution processing at Holst Centre and additional layers applied by conventional vacuum deposition at Solvay. Read more »

White Paper | Technology | Mar 06, 2012

At High Environmental Temperatures and at Very Low Power LED's Wall Plug Efficiency Exceeds 100%

An LED’s power conversion (wall-plug) efficiency varies inversely with its optical output power. Wall-plug efficiency can exceed 100% at low applied voltages and high temperatures. The laws of thermodynamics were not overruled. The "extra-power is provided by vibrations in the device’s crystal lattice due to the high environmental temperature. Image credit: Santhanam, et al. ©2012 American Physical Society For the first time, researchers have demonstrated that an LED can emit more optical power than the electrical power it consumes. Although scientifically intriguing, the results won’t immediately result in ultra-efficient commercial LEDs since the demonstration works only for LEDs with very low input power that produce very small amounts of light and emits primarily in the invisible IR range of 2.4 µm. Read more »

White Paper | Technology | Feb 07, 2012

Power Integrations - 15.3 W Dimmable LED Driver Design for PAR30/PAR38 Applications

Schematic of PI's DER314 reference design The engineering team at PI just released an isolated, high power factor, TRIAC dimmable, LED driver design for PAR30/PAR38 applications. Design Example Report 314 (DER-314) is designed to drive a nominal LED string voltage of 36 V at 425 mA from an input voltage range of 185 VAC to 265 VAC. Read more »

White Paper | Technology | Jan 13, 2012

Success in Research: First Gallium-Nitride LED Chips on Silicon in Pilot Stage

The process diagram shows the production of a UX:3 chip on a silicon wafer Researchers at Osram Opto Semiconductors have succeeded in manufacturing highperformance prototypes of blue and white LEDs, in which the light-emitting gallium-nitride layers are grown on silicon wafers with a diameter of 150 millimeters. The silicon replaces the sapphire commonly used until now without a loss in quality. Already in the pilot stage, the new LED chips are to be tested under practical conditions, meaning that the first LEDs on silicon from Osram Opto Semiconductors could hit the market in just two years. Read more »

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

DOE Releases Consortium Report on LED Street Lights

The U.S. Department of Energy (DOE) has published the final report from a demonstration of LED technology in ornamental post-top street lights, conducted in Sacramento, CA. This report provides an overview of the evaluation of four different LED replacement products using computer simulations, field measurements, and laboratory testing. The evaluation was conducted by DOE’s Municipal Solid-State Street Lighting Consortium in collaboration with the Sacramento Municipal Utility District and the City of Sacramento, with additional support from City consultant Mary Matteson Bryan. Read more »

White Paper | Technology | Dec 15, 2011

Independent Study Demonstrating that Pink Sapphire Produces Highest Transmission Colorless Epi-Wafers

The analysis concludes there is no correlation between the trace color found in the wafers and the color of the GT ASF-grown material GT Advanced Technologies Inc. announced the release of a case study that details the findings of a series of blind material studies conducted to evaluate the impact of sapphire color on the LED manufacturing process. The studies demonstrated that all sapphire, regardless of source, exhibits color at the core level, that the pink hue of GT Advanced Sapphire Furnace (ASF™) material is not indicative of impurities, and that pink ASF sapphire does not have an adverse affect on the LED manufacturing process nor does it require extra steps or incremental costs to remove the pink hue. In addition, it was demonstrated that GT ASF pink sapphire material makes the lowest absorption, highest transmission epi-wafers of the samples examined. Read more »

White Paper | Technology | Dec 01, 2011

New LED Driver Design from Power Integrations Maximizes Efficiency of Compact B10, GU10, E17 and A19 Bulbs

Power Integrations' DER-297 referenz design circuit board photog with American Coin (Dime) for reference Power Integrations, maker of the world's most efficient, longest-lasting off-line LED driver ICs, today published a reference design (DER-297) describing a high-efficiency, ultra-compact driver for a B10-style LED light bulb. Based on Power Integrations' LinkSwitch-PL non-isolated, single-stage LED driver IC, the power supply is specifically tailored for use with high-voltage LEDs such as the recently announced XLamp XM-L and XLamp XT-E ranges from Cree. DER-297 provides the high-voltage output required by the LEDs, optimizing overall system efficiency by reducing power lost due to current flow in the driver inductor and output diode. Read more »

White Paper | Technology | Dec 18, 2009

Cree Study Shows LED Lighting is Best Bet for Energy Efficiency

Comparison of the use phase and production energy consumption for various lighting technologies (Carnegie Mellon LCA). LED lighting at an efficacy of 60 lumens per watt has a comparable overall energy consumption to CFL.2 With higher efficacy LED products, A new report on the life-cycle energy usage of energy-efficient lighting by Cree, Inc. shows that LED lighting products are now more efficient than traditional lighting products when compared across the high-volume applications of recessed downlighting and display spotlighting. Evaluating light fixtures and applications, the white paper’s energy comparisons demonstrate that LEDs offer clear advantages in terms of energy costs and environmental impact over traditional lighting such as incandescent, halogen and compact fluorescent bulbs. Read more »

FEATURED

Emergency Lighting Just Got Smarter

Emergency Lighting Just Got Smarter NEW NOW: OSRAM’s standalone solution for emergency lighting testing, reporting and maintenance. Meet the QBM DALI EL-T CONV, a converter transforming existing DALI emergency luminaires into wireless ones, all controlled by the same lighting system. Its benefits? Allowing you to design all the ... Read more »

FEATURED

Continuous versus Discrete Calibration Sources: Consideration for Use

Continuous versus Discrete Calibration Sources: Consideration for Use Rapid advancements in the field of solid-state lighting have presented opportunities for the use of LED-based systems for calibrations typically performed with lamp-based sources. Their highly efficient and long-lived performance, rapid power up, and compact size have made LED-based sources an ... Read more »

FEATURED

LUXTECH Offers First Compelling Flex Modules Designed to Replace Traditional Rigid Modules: LUXroll (UL Listed)

LUXTECH Offers First Compelling Flex Modules Designed to Replace Traditional Rigid Modules:  LUXroll (UL Listed) The Indirect Costs of Using Rigid Boards Make Switching to Flexible LED Modules a Compelling Choice. Read more »

EDITORIAL

New LUXEON Rubix Cyan LED Enables 96-98 CRI Across CCT Range in Color Driven Solutions for Entertainment, Stage, and Studio

New LUXEON Rubix Cyan LED Enables 96-98 CRI Across CCT Range in Color Driven Solutions for Entertainment, Stage, and Studio Lumileds added cyan, its eighth color, to the LUXEON Rubix high-power LED family enabling multi-color driven systems to produce very high CRI white light that is so important in entertainment lighting. Adding the cyan LED fills a significant wavelength gap between blue and green in a system and ... Read more »

EDITORIAL

New date: Light + Building Autumn Edition 2022

New date: Light + Building Autumn Edition 2022 Frankfurt am Main, January 10, 2022. As the pandemic situation continues to develop very dynamically, Messe Frankfurt is postponing the world's leading trade fair for light and building technology to autumn 2022. Last December, intensive discussions with customers and cooperation partners had ... Read more »

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