LED & OLEDs Collection

Technology | Jul 28, 2010
Hybrid Semiconductors Show Zero Thermal Expansion
Hybrid Semiconductors Show Zero Thermal Expansion 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 | Jul 28, 2010
Researchers Believe that New Technology Could Replace the Household Light-bulb Within Three Years
Researchers Believe that New Technology Could Replace the Household Light-bulb Within Three Years 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 | Jul 28, 2010
Cnam Lounched Research Project on Characterization of Colour Rendering of LED Light Sources
Cnam Lounched Research Project on Characterization of Colour Rendering of LED Light Sources 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 | Jul 28, 2010
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 | Jul 28, 2010
Research for OLED mass production
Research for OLED mass production 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 | Jul 28, 2010
The OLLA Project - Final Milestone: Europe’s Most Efficient OLED Lighting Tile Demonstrated
The OLLA Project - Final Milestone: Europe’s Most Efficient OLED Lighting Tile Demonstrated 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 28, 2010
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 | Jul 28, 2010
World Record White OLED Performance Exceeds 100 lm/W
World Record White OLED Performance Exceeds 100 lm/W 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 | Jul 28, 2010
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 | Jul 28, 2010
Low–Cost LEDs to Slash Household Electric Bills
Low–Cost LEDs to Slash Household Electric Bills 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 | Jul 28, 2010
E-Static Shadows: OSRAM LED in Electronic Textiles
E-Static Shadows: OSRAM LED in Electronic Textiles "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 | Jul 28, 2010
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 | Jul 28, 2010
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 | Jul 28, 2010
SRI and SDK Announce Breakthrough Performance in Organic Light-Emitting Diode (OLED) Devices for SSL Applications
SRI and SDK Announce Breakthrough Performance in Organic Light-Emitting Diode (OLED) Devices for SSL Applications 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 »
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