Trends

Technology | Jul 16, 2010

White OLED Outlook Brightens with Efficiency Breakthrough

ge_white_oled_outlook_brightens_with_efficiency_br GE Global Research, the technology development arm for the General Electric Company (NYSE: GE), GE Lighting and Konica Minolta (KM) have achieved a major breakthrough that brings the companies closer to making high-efficiency organic light-emitting diode (OLED) lighting devices a reality. GE and KM scientists have demonstrated illumination-quality white OLEDs using “solution-coatable” materials that are essential for producing OLEDs at a low cost. Read more »

Technology | May 17, 2010

Successful Extraction of Light from Semiconductors with the Highest Efficiency

(a) Schematic illustration of the double coupling of evanescent waves and (b) simulated electromagnetic field intensity of the sample coated with the SiO2 layer. Wang XueLun, Near-Field Nano-Engineering Group, Nanotechnology Research Institute, and the National Institute of Advanced Industrial Science and Technology, succeeded in extracting light from a semiconductor into air with the highest efficiency. Read more »

Technology | Apr 29, 2010

Rice Researchers Theorize Acoustic Waves May Cool Microelectronics

rice_univ_thermal_graphene_sound-jpg Acoustic waves traveling along ribbons of graphene might be just the ticket for removing heat from very tiny electronic devices. Read more »

Technology | Apr 19, 2010

Solid-state Illumination Reduces Nitrates in Leafy Green Vegetables

Searching for ways to improve the nutritional quality of leafy green vegetables, Lithuanian researchers have found success with new technology that features high-density photosynthetic photon flux generated by a solid-state illuminator. Read more »

Technology | Apr 07, 2010

Berkeley Researchers Light Up White OLEDs - A New Way To Process White OLEDs

berk_oled_research_sm-jpg Using polymer nanoparticles to house light-emitting ‘inks’, scientists have made a thin film OLED using iridium-based guest molecules to emit various colors of visible light. Read more »

Technology | Apr 06, 2010

NREL Finds a Way to Give LEDs the Green Light

nrel_sm-jpg NREL scientists found a way to generate a tricky combination of green and red that may just prove to be the biggest boost for illumination since Edison's light bulb. Read more »

Technology | Mar 23, 2010

Nanowire Advances Promise Improved Light-Emitting Diodes and Solar-Energy Generation

asu_research_nanowire_sm-jpg A recent advance by ASU researchers in developing nanowires could lead to more efficient photovoltaic cells for generating energy from sunlight, and to better light-emitting diodes (LEDs) that could replace less energy-efficient incandescent light bulbs. Read more »

Technology | Mar 08, 2010

MIT Team Coaxes Polymers To Line Up, Transforming Them Into Materials That Could Dissipate Heat

mit_polymerconductor_sm-jpg MIT team has found a way to transform the most widely used polymer, polyethylene, into a material that conducts heat just as well as most metals, yet remains an electrical insulator. Read more »

Technology | Feb 11, 2010

RTI International Develops New SSL Technology to Make Energy-Efficient Lighting

RTI's new SSL light source basd on a advanced nanofiber structure. RTI International has developed a revolutionary lighting technology that is more energy efficient than the common incandescent light bulb and does not contain mercury, making it environmentally safer than the compact fluorescent light (CFL) bulb. Read more »

Technology | Feb 04, 2010

Cree Breaks 200 Lumen Per Watt Efficacy Barrier

Cree, Inc. (Nasdaq: CREE), a market leader in LED lighting, announces another industry-best reported efficacy record of 208 lumens per watt for a white power LED. This R&D result passes a significant milestone within the solid-state lighting industry as well as demonstrates Cree’s relentless drive to increase the performance of its LEDs. Read more »

Technology | Feb 01, 2010

Thermally Activated Degradation of Phosphor-Converted White LEDs

Figure 8 - Optical images of electrical aged device (top), thermal aged device (center), and the cross section of the electrical aged device, along cathode-anode direction. The increasing performances and long lifetime of High Brightness LEDs are still limited by the high temperatures involved. This work shows the results of several accelerated lifetime tests on 1W white LEDs. Two different tests have been carried out: a pure thermal storage at different temperatures and an electrical aging obtained by biasing the LEDs. The impact of high temperatures has been evaluated in terms of flux decay, chromatic properties modification, increase of forward voltage and thermal resistance. A picture of the main degradation mechanisms detected has been provided in detail. 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 »

Technology | Dec 02, 2009

Cree Achieves 186 Lumens per Watt from a High-Power LED

Cree, Inc. (Nasdaq: CREE), a market leader in LED lighting, announces it has achieved industry-best reported R&D results of 186 lumens per watt for a white power LED. Read more »

Technology | Nov 24, 2009

3M Claims Record Efficacy for Green LEDs

3M Claims Record Efficacy for Green LEDs Green LED | November 24, 2009 Scientists at 3M have unveiLed a color-conversion technology that doubles the efficiency of green LEDs, compared with currently-available green emitters. The St. Paul, Minnesota-based company says that the technology could lead to accelerated adoption of LEDs in demanding applications such as LCD display backlights and pico-projectors. Read more »

Technology | Nov 06, 2009

OSRAM LED Produces Warm White Light with High Efficiency and True Colors

A new converter mix that OSRAM is currently testing in its development laboratory provides a pleasant warm white light OSRAM Opto Semiconductors has developed an LED that offers high efficiency, excellent color rendering and a pleasant warm white light. The prototype is the first to offer the three important properties that together are essential for general illumination applications, namely a color temperature of 3000 K, a color rendering index of 82 and an efficiency of 104 lm/W. Read more »

Technology | Aug 21, 2009

Ultrathin LEDs Create New Classes of Lighting and Display Systems

Stretchable micro-LED display, consisting of an interconnected mesh of printed micro LEDs bonded to a rubber substrate. (Photo by D. Stevenson and C. Conway, Beckman Institute, University of Illinois). A new process for creating ultrathin, ultrasmall inorganic light-emitting diodes (LEDs) and assembling them into large arrays offers new classes of lighting and display systems with interesting properties, such as see-through construction and mechanical flexibility, that would be impossible to achieve with existing technologies. Read more »

Technology | Aug 05, 2009

OSRAM Study: LED Life-Cycle Assessment

Apart from direct input of raw materials, the energy input, materials and emissions associated with the retrieval of resources are recorded. The results allow for conclusions not only on resource consumption and primary energy input but also acidification, eutrophication, the greenhouse effect, ozone depletion and toxicity. An OSRAM Opto Semiconductors` study on the life-cycle assessment (LCA) of LED lamps shows the latest generation of lamps achieves a very high score for environmental friendliness. Read more »

Technology | Jul 28, 2009

SRI and SDK Announce Breakthrough Performance in Organic Light-Emitting Diode (OLED) Devices for SSL Applications

sdk_sri_oled_breakthrough1-jpg SRI International, an independent nonprofit research institute, and Showa Denko K.K. (SDK), a Japan-based chemical industry company in partnership with Itochu Plastics Inc. (CIPS), have achieved record-breaking results using SRI’s new cavity organic light-emitting diode (COLED) technology and SDK’s light-emitting polymers to produce a highly efficient light source that could one day replace incandescent and fluorescent light bulbs. Read more »

Technology | Jul 22, 2009

IMEC Launches New Industrial Affiliation Program on GaN-on-Si Technology

IMEC today announces the launch of a new industrial affiliation program (IIAP) that will focus on the development of GaN technology for both power conversion and solid state lighting applications. Read more »

Technology | May 15, 2009

White Record OLEDs of Dresden University and Novaled Surpass Efficiency of Fluorescent Tubes

White organic light-emitting diodes (OLEDs) are a promising new technology to become the next generation light source. They have the potential of much higher efficiencies than classical lighting sources. Read more »

Technology | Apr 10, 2009

Lumileds claims double LED brightness

Photonic crystal Philips Lumileds has produced what it says is the highest-extraction-efficiency photonic-crystal LED to date. Read more »

Technology | Apr 10, 2009

Japanese Researchers Double Green Phosphorescent OLED Efficiency

The high-efficiency, green light-emitting OLED device developed by the Mikami Lab at the Kanazawa Institute of Technology A Japanese research group succeeded in making an OLED device using a green light-emitting phosphor material and achieving a very high light-emitting efficiency of 210lm/W. Read more »

Technology | Mar 30, 2009

Compact 72-W Neutral White and 18-W Warm White LED Emitter with Record Lumen Efficiency

Optoelectronics Packaging & Materials Labs at the University of California developed a multi-chip integrated compact white LED single emitter with an import power of 72,84W, producing a total of 6543 lm at a CCT of 4455K that has reached a record lumen efficiency of 89,8 lm/W, and a multi-chip integrated warm white LED compact single emitter with an input power of 18,62W, producing a total of 1444lm at a CRI of 91,3 and a CCT of 3928K that has reached a record lumen efficiency of 77,4lm/W, according to the reports issued by the US National Institute of Standards and Technology on December 8, 2008. Read more »

Technology | Feb 25, 2009

LUXEON® Rebel Lumen Maintenance Exceeds ENERGY STAR® Guidelines

Philips Lumileds’ announced today that test data for its LUXEON Rebel LEDs shows performance that exceeds ENERGY STAR® guidelines intended to ensure quality solid-state luminaire development. The data shows that LUXEON Rebel LEDs have average lumen maintenance of 99% after 6,000 hours, far surpassing the 91.8% ENERGY STAR requirements for residential fixtures as well as available published data for other power LEDs. Read more »

Technology | Feb 04, 2009

E-Static Shadows: OSRAM LED in Electronic Textiles

The electronic textile acts as a static mirror – responding to the usually invisible charges (Source: Zane Berzina ).  "E-Static Shadows" is an experimental cross-disciplinary research project by designer and researcher Dr. Zane Berzina and architect Jackson Tan from insquarelab in collaboration with TITV – Textile Research Institute Greiz in Thüringen, Germany, the Computing Department at Goldsmiths and Queen Mary University of London. Read more »

Technology | Jan 30, 2009

Low–Cost LEDs to Slash Household Electric Bills

LEDs lighting up Banpo Bridge in Seoul, South Korea. The EPSRC Press Office recently announced: Engineering and Physical Sciences Research Council (EPSRC), the Cambridge University based Centre for Gallium Nitride has developed a new way of making GaN LEDs that could see household lighting bills reduced by up to 75% within five years. Read more »

Technology | Jan 30, 2009

For Refrigeration Problems, a Magnetically Attractive Solution, Maybe for SSL Cooling too

HOW IT WORKS: Conventional and magnetic refrigeration cycles use different physical effects to cool things off. [Top] When a gas is compressed (2), it heats up, but if it is cooled and then allowed to expand (3), its temperature drops much lower than it was originally (4); this principle keeps food in your home refrigerator cool. But a magnetocaloric material [bottom] heats up when magnetized (b); if cooled and then demagnetized (c), its temperature drops dramatically (d). Electricity-guzzling cooling systems could soon be a lot smaller, quieter and more economical thanks to an exotic metal alloy discovered by an international collaboration working at the National Institute of Standards and Technology (NIST)’s Center for Neutron Research (NCNR).* Read more »

Technology | Jan 20, 2009

New CALiPER Benchmark Report: Comparison of T12 and T8 Fluorescent Lamps and LED Linear Replacement Lamps

The U.S. Department of Energy (DOE) has published a new CALiPER Benchmark Report, presenting a comparison of T12 and T8 linear fluorescent lamps with commercially available LED linear replacement lamps. CALiPER testing addressed a range of standard lighting measures, including power usage, luminous flux, photometric distribution, source and luminaire efficacy, correlated color temperature (CCT), and color-rendering index (CRI) for the lamps tested separately and in troffers. Read more »

Technology | Jan 13, 2009

Smart Lighting: New LED Drops the “Droop”

Band diagram of conventional GaInN/GaN active region and new polarization-matched GaInN/GaInN active region of a light-emitting diode. Researchers at Rensselaer Polytechnic Institute have developed and demonstrated a new type of light emitting diode (LED) with significantly improved lighting performance and energy efficiency. Read more »

Technology | Dec 19, 2008

Bright White Light Coaxed from Unexpected Source

'Doped' zinc oxide 'phosphor' converts ultraviolet to visible white light. Duke researchers find an ultrafine form of zinc oxide can shine brilliantly when combined with sulfur. 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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