Trends

Technology | Dec 09, 2008

World Record White OLED Performance Exceeds 100 lm/W

doe_oledrek08_sm-jpg Universal Display Corporation (UDC) has successfully demonstrated a record-breaking white organic light-emitting diode (WOLED) with a power efficacy of 102 lm/W at 1000 cd/m2 using its proprietary, high-efficiency phosphorescent OLED technology. Read more »

Technology | Dec 01, 2008

LED Source Modeling Method Evaluations

Figure 2: Type 3 Source Model Geometry Producing accurate simulations of LED based optical systems requires accurate source models. This means the source models must not only produce the correct distribution of light in a far field measurement, they must also produce the correct near field behavior since secondary LED optics are often employed in very close proximity to the LED. Accurate simulations are vital to the design process especially with lens optics commonly used on LEDs given the high cost and long lead times for lens tooling. The data presented in this paper is a direct result of the lessons learned by one manufacturer about the importance of simulation accuracy. Read more »

Technology | Nov 26, 2008

BASF and OSRAM Set New Standards for OLEDs: 60 lm/W and White Color Requirements Met

In the JIL, BASF OLED lab, it is the reserachers’ aim to develop OLED-based illuminants that consume only half as much electricity as conventional energy-saving lamps and have a longer life. BASF and OSRAM Opto Semiconductors have developed a highly efficient white organic light-emitting diode (OLED): for the first time an OLED not only is able to achieve a light yield of over 60 lumens per watt (lm/W), but also, at the same time, meets the international Energy Star SSL Standard with regard to color requirements. Read more »

Technology | Nov 20, 2008

Cree Achieves 161 Lumens per Watt from a High-Power LED

Cree, Inc. (Nasdaq: CREE), a leader in LED lighting, announces it has achieved industry-best reported R&D results of 161 lumens per watt for a white power LED. Read more »

Technology | Oct 29, 2008

New efficieny record for OLEDs

MUNICH, Germany — A research group of the Dresden Technical University has achieved record energy efficiencies for OLEDs. The achievement brings the organic LED technology closer to industrial volume production. The research team achieved an efficiency of 26, 22 and 3.1 percent for red, green and blue organic LEDs which combined form a white light source. Read more »

Technology | Oct 17, 2008

The OLLA Project Receives OSIA Award 2008 for Research & Development

olla_oisa2008-jpg At the Organic Semiconductor Conference (OSC-08) from 30th September until 1st October 2008 in Frankfurt (Germany), the European OLLA project received the 2008 Organic Semiconductor Industry Award (OSIA) in the Research and Development category. Read more »

Technology | Sep 10, 2008

Optek - Thermal Management - Introduction

Optek presents the research on heat management. Read more »

Technology | Jul 21, 2008

World Record in the OSRAM Laboratory: 155 lm for Brightness and 136 lm/W for Efficacy at 350mA

OSRAM has achieved new records in the laboratory for white light – 155 lm for brightness and 136 lm/W for efficacy (at 350mA). Luminus flux and efficacy vs. drive current. By improving all the technologies involved in the manufacture of LEDs, OSRAM development engineers have achieved new records for the brightness and efficiency of white LEDs in the laboratory. Read more »

Technology | Jul 18, 2008

"Metallized" Silicon Substrate with a Reflective Layer of Zirconium Nitride for Low-Cost, Bright LED Lighting

purdue_led_prod_sm-jpg Researchers at Purdue University have overcome a major obstacle in reducing the cost of "solid state lighting," a technology that could cut electricity consumption by 10 percent if widely adopted. Read more »

Technology | Jul 08, 2008

The OLLA Project - Final Milestone: Europe’s Most Efficient OLED Lighting Tile Demonstrated

olla_oled1_sm-jpg At the end of the project period, the OLLA project* consortium presents its final milestone: the basic technology for a white OLED (Organic Light-Emitting Diode) light source, with an efficacy of 50.7 lumens per watt at an initial brightness of 1.000 cd/m² based on the Novaled PIN OLED technology. The OLLA project is a joint basic research consortium, headed by Philips Lighting. Read more »

Technology | Jul 07, 2008

Standards Set for Energy-Conserving LED Lighting

nist_ledstandards-jpg These solid-state lights are powered by energy-efficient light emitting diodes and are among the first ones of a new generation expected to cut energy needed for lighting by 50 percent by 2027. Read more »

Technology | Jun 21, 2008

Research for OLED mass production

CombOLED builds on the experience gained in the OLLA project in which this 15 cm x 15 cm demonstrator based on light-emitting polymer materials was produced jointly with Siemens and other partners The development of cost-effective processes for volume production of organic light emitting diodes (OLEDs) is the focus of the research work carried out under the CombOLED project. “The objective of this project, which is being funded by the EU and coordinated by OSRAM, is to create the necessary conditions for introducing the new light sources into lighting applications”, said Bernhard Stapp, Head of Solid State Lighting at OSRAM Opto Semiconductors. Read more »

Technology | Mar 17, 2008

OSRAM OLED Achieves High Levels of Efficiency and Lifetime

New warm white OLED with an efficiency of 46 lm/W (CIE of 0.46/0.42 measured in the integrating sphere), CRI of 80 and a life of more than 5000 hours. After only two years of development, OSRAM has achieved record values in the laboratory for organic light emitting diodes in warm white, with an efficiency of 46 lm/W and a brightness of 1000 cd/m² for more than 5000 hours. Read more »

Technology | Mar 12, 2008

GE Demonstrates World’s First “Roll-to-Roll” Manufactured Organic Light Emitting Diodes (OLEDs)

ge_oled_research-jpg GE Global Research and GE Consumer & Industrial, today announced the successful demonstration of the world’s first roll-to-roll (newspaper printing-like process) manufactured organic light-emitting diode (OLED) lighting devices. Read more »

Technology | Feb 29, 2008

Student Develops New LED, Wins $30,000 Lemelson-Rensselaer Prize

rens_ms_newled_sm-jpg A Rensselaer Polytechnic Institute student has developed a new type of LED that could allow for their widespread use as light sources for liquid crystal displays (LCDs) on everything from televisions and computers to cell phones and cameras. Read more »

Technology | Feb 15, 2008

Power Integrations' Design Ideas Target Wasteful Incandescent Bulbs and Enable High Efficacy LED Street Lights

Schematic of 14 W LED Driver Power Supply Using a TNY279GN in High Ambient Temperature Applications Power Integrations (NASDAQ:POWI), the leader in high-voltage analog integrated circuits for power conversion, today announced three new Design Ideas at the Strategies In Light Exhibition and Conference, designed to make implementing LED lighting faster, simpler and more efficient. Read more »

Technology | Feb 04, 2008

ITRI develops alternate current LEDs

While ordinary 110/230 volt AC power must be converted to DC with a lower voltage for LED usage, at a cost and efficiency loss, Taiwan's Industrial Technology Research Institute (ITRI) has developed an alternate current light emitting diode (ACLED) with a luminous efficacy of 50lm/W, which does not need a AC-DC converter. Read more »

Technology | Jan 21, 2008

Saint-Gobain and Novaled Announce a Breakthrough in Glass Substrates for OLED

novaled_research_sm-jpg Saint-Gobain and Novaled have demonstrated the feasibility of large area OLEDs, based on a new high-performance metallic anode, with Saint-Gobain Recherche technology and Novaled OLED proprietary developments. Read more »

Technology | Jan 09, 2008

Researchers Believe that New Technology Could Replace the Household Light-bulb Within Three Years

lightbulb-jpg Light Emitting Diodes (LEDs), already used in electrical equipment such as computers and mobile phones, are several times more energy efficient than standard light-bulbs. However, because of their structure and material, much of the light in standard LEDs becomes trapped, reducing the brightness of the light and making them unsuitable as the main lighting source in the home. Read more »

Technology | Jan 09, 2008

Cnam Lounched Research Project on Characterization of Colour Rendering of LED Light Sources

fig2-jpg The CIE method applied since 1974 for defining the CRI (colour rendering index) allows the quantification of the "quality" of the light generated by artificial light sources. This index ranging from 0 to 100 defines the capacity of a light source to reproduce the various colours of objects, compared to a reference source, but does not apply correctly to LEDs. So, new studies are recommended to determine a new colour index or indices which take white light produced by LEDs into account. Read more »

Technology | Jan 08, 2008

Hybrid Semiconductors Show Zero Thermal Expansion

ZTE material:  The crystal structure of -ZnTe(en)0:5 interconnected by ethylenediamine (C2N2H8) Thermal expansion can separate semiconducting materials from the substrate, reduce performance through changes in the electronic structure of the material or warp the delicate structures that emit laser light. Recently published research by scientists at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) and Argonne National Laboratory, and academic institutions has shed light on a semiconducting material with zero thermal expansion (ZTE). Read more »

Technology | Dec 14, 2007

NEW TRANSPARENT WHITE OLED FROM OSRAM OPTO SEMICONDUCTORS ACHIEVES HIGH LEVEL OF PERFORMANCE

Large-scale prototype of the transparent white OLED tile. OSRAM Opto Semiconductors has developed a transparent white OLED tile with outstanding performance. Under laboratory conditions, the OLED prototype has achieved a luminous efficiency of more than 20 lm/W at a brightness of 1000 cd/m². Read more »

Technology | Dec 07, 2007

German Future Prize 2007 for OSRAM’s LED Research Team

os_ostar_proj_opt_sm-jpg For outstanding research work on innovative lighting technologies Dr. Klaus Streubel and Dr. Stefan Illek from OSRAM Opto Semiconductors, together with Dr. Andreas Bräuer from the Fraunhofer Institute for Optics and Precision Engineering in Jena, were awarded this year’s prize for technology and innovation from the President of Germany. Read more »

Technology | Nov 22, 2007

YOLE DEVELOPPEMENT - EPIC Report: Breaking the Profit-barrier with Ultra-High Brightness LEDs

Only higher luminous LED eficiency will open the general lighting market doors. The 10 key on-going technologies to make the LEDs to generate more light than heat and finally take the competitive lead in lighting markets. - The report shows manufacturing technologies, challanges and chances in LED business. Read more »

Technology | Nov 16, 2007

Novel semiconductor structure bends light 'wrong' way - the right direction for many applications

Negative refraction: An opportunity for new applications - also for LED lighting? Hilary Parker, Princeton University - A Princeton-led research team has created an easy-to-produce material from the stuff of computer chips that has the rare ability to bend light in the opposite direction from all naturally occurring materials. Read more »

Technology | Oct 11, 2007

OSRAM researchers nominated for the German President’s prize for technology and innovation

os_ostar_proj_opt2-jpg OSRAM, together with the Fraunhofer Institute for Applied Optics and Precision Engineering, is one of the four teams nominated for the German Future Prize. The German Future Prize, which is now in its eleventh year, will be presented by Federal President Horst Köhler in December to celebrate outstanding technical, engineering and scientific achievements that have practical applications, are marketable and create jobs. Read more »

Technology | Oct 05, 2007

Argonne researcher studies what makes quantum dots blink

Green laser adjustment to monitor the sporadic blinking of quantum dots. In order to learn more about the origins of quantum dot blinking, researchers from the U.S. Department of Energy's Argonne National Laboratory, the University of Chicago and the California Institute of Technology have developed a method to characterize it on faster time scales than have previously been accessed. Read more »

Technology | Oct 05, 2007

Researchers shed light on light-emitting nanodevice - a promise for light-emitting, flexible semiconductors

Top view of the ruthenium tris-bipyridine light-emitting device created by Cornell researchers. The ruthenium metal complex is represented by red spheres, and counter ions are represented by green spheres. The material is sandwiched between two gold electrodes. Also visible is the probe of the electron force microscope used to measure the electric field of the device. Source: Cornell University An interdisciplinary team of Cornell nanotechnology researchers has unraveled some of the fundamental physics of a material that holds promise for light-emitting, flexible semiconductors. The discovery, which involved years of perfecting a technique for building a specific type of light-emitting device, is reported in the Sept. 30 online publication of the journal Nature Materials. Read more »

Technology | Sep 21, 2007

Toward pure white light: Next-generation LEDs show bright promise

Scientists in India are reporting an advance toward discovering a Holy Grail of the illumination industry — a white LED, a light-emitting diode that produces pure white light suitable for interior lighting of homes, offices and other buildings. Their study is in the Sept. 9 issue of ACS' The Journal of Physical Chemistry C, a weekly publication ("White Light from Mn2+-Doped CdS Nanocrystals: A New Approach"). Read more »

Technology | Sep 14, 2007

Cree Achieves Highest NIST Verified Efficacy from a High-Power LED

Cree, Inc. (Nasdaq: CREE), a leader in LED lighting components, today announced it has achieved R&D results of 129 lumens per watt for a cool-white LED and 99 lumens per watt for a warm-white LED. These are the best results reported for packaged, high-power LEDs, and they clearly indicate that Cree is extending its lead in solid-state lighting through its continued investments in LED technology. 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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