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 »

White Paper | Technology | Oct 10, 2012

Fan Efficiency, An Increasingly Important Selection Criteria

A typical performance plot of a 120mm size axial fan with curves for both airflow and efficiency How important is fan efficiency in the selection of a cooling system? Selecting a cooling fan is no longer about airflow and noise. The true test for a design engineer is the understanding that by selecting an efficient cooling fan system savings in cost of ownership can be realized. NMB Technologies Corporation, a Minebea Group Company, has released a new white paper on that issue. Read more »

White Paper | Standardization + Regulation | Oct 03, 2012

EMerge Alliance Releases Version 1.1 of Occupied Space Standard

Progress continues toward integrated standards for DC microgrids in buildings SAN RAMON, CALIF. (October 2, 2012) – The EMerge Alliance – an open industry association leading the rapid adoption of safe direct-current (DC) power distribution standards for commercial buildings – today announced it has updated the EMerge Alliance Occupied Space standard, the first application platform model for the utilization of low-voltage DC power in commercial interiors. The EMerge Alliance Occupied Space standard creates an integrated, open platform for power, interior infrastructures, controls and a wide variety of peripheral devices to facilitate the hybrid use of AC and DC power within commercial buildings. Version 1.1 includes several important updates to voltage limits, recommended cable sizes and other requirements to assist companies developing products when using the standard. These changes are backwards compatible and maximize the interoperability and efficiency of EMerge Alliance Registered products. Read more »

White Paper | Standardization + Regulation | Oct 03, 2012

EMerge Alliance Releases Version 1.1 of Occupied Space Standard

Progress continues toward integrated standards for DC microgrids in buildings SAN RAMON, CALIF. (October 2, 2012) – The EMerge Alliance – an open industry association leading the rapid adoption of safe direct-current (DC) power distribution standards for commercial buildings – today announced it has updated the EMerge Alliance Occupied Space standard, the first application platform model for the utilization of low-voltage DC power in commercial interiors. The EMerge Alliance Occupied Space standard creates an integrated, open platform for power, interior infrastructures, controls and a wide variety of peripheral devices to facilitate the hybrid use of AC and DC power within commercial buildings. Version 1.1 includes several important updates to voltage limits, recommended cable sizes and other requirements to assist companies developing products when using the standard. These changes are backwards compatible and maximize the interoperability and efficiency of EMerge Alliance Registered products. Read more »

White Paper | Technology | Sep 11, 2012

SMART-Project Aims to Develop Logic and Light on a Chip Using GaN-on-Si Technology

The research project Low Energy Electronics Systems (LEES) has started its work with a kick-off meeting. The program’s initiator is the renowned Singapore MIT Alliance for Research and Technology (SMART) Center based in Singapore. The LEES team consists of eminent research and science specialists and is targeting the development of cuttingedge technology to increase energy efficiency and advance high-tech industries that complement microelectronics. Two AIXTRON CRIUS® 1x200 mm systems, which the project managers ordered early this year, will form the technological foundation basis for the LEES project work. They will be available for use in the project from the fourth quarter of 2012. 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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