Trends

Technology | May 29, 2007

New Fabrication Technique Yields Nanoscale UV LEDs

Micrograph of a complete nanowire LED. The long nanowire (A) is about 110 micrometers long, a shorter nanowire (B) crosses it. The circular section is the metal post from which the nanowires are aligned. Researchers at the National Institute of Standards and Technology (NIST), in collaboration with scientists from the University of Maryland and Howard University, have developed a technique to create tiny, highly efficient light-emitting diodes (LEDs) from nanowires. Read more »

Technology | May 07, 2007

Philips Lumileds Leads Response to Lighting Industry Needs with New Reliability Analysis Tools

power_led_lifetime_2-gif Philips Lumileds has introduced a new reliability analysis tool that for the first time enables lighting designers to confidently determine lifetime performance of LEDs under different operating conditions. Philips Lumileds graphical representation of reliability allows designers to understand and evaluate the impact of temperature and drive current on lumen maintenance and failure rates of LEDs. Read more »

Technology | Apr 30, 2007

Low-energy LED lighting project is streets ahead

Researchers at The University of Manchester have joined forces with Dialight Lumidrives - founded by a successful former student - to develop powerful low-cost LED lighting modules that can be used in buildings and on roads. Read more »

Technology | Apr 23, 2007

Nano scientists to develop next-generation LEDs

Nanotechnology may unlock the secret for creating highly efficient next-generation LED lighting systems, and exploring its potential is the aim of several projects centered at Oak Ridge National Laboratory. Read more »

Technology | Mar 26, 2007

Negative Refraction of Visible Light Demonstrated

For the first time, physicists have devised a way to make visible light travel in the opposite direction that it normally bends when passing from one material to another, like from air through water or glass. The phenomenon is known as negative refraction and could in principle be used to construct optical microscopes for imaging things as small as molecules, and even to create cloaking devices for rendering objects invisible. Read more »

Technology | Mar 09, 2007

GE Global Research, TOKKI Corp. announce joint project to develop PECVD film encapsulation technology & equipment for OLED displays

NISKAYUNA, N.Y – GE Global Research, the centralized research organization for the General Electric Company (NYSE: GE) and TOKKI Corporation, a leading supplier of OLED manufacturing equipment, announced a joint agreement to develop PECVD Film Encapsulation technology and equipment for manufacturing organic electronics such as organic light emitting diode (OLED) flat panel displays. Read more »

Technology | Mar 07, 2007

New coating is virtual black hole for reflections

panasonic_gan-gif Researchers have created an anti-reflective coating that allows light to travel through it, but lets almost none bounce off its surface. Read more »

Technology | Mar 02, 2007

Arrowhead subsidiary collaborates with Kyma Technologies to reduce the cost of blue lasers and blue LEDs

PASADENA, Calif., Arrowhead Research Corporation (NASDAQ ARWR) announced today that its majority-owned subsidiary, Aonex Technologies, Inc. has entered into a collaborative agreement with Kyma Technologies, Inc., a producer and marketer of semiconductor products, to develop materials to reduce the cost of gallium nitride (GaN)-based devices such as blue laser diodes and blue light emitting diodes (LEDs). Read more »

Technology | Mar 02, 2007

Rensselaer researchers create world's first ideal anti-reflection coating

To achieve a very low refractive index, silica nanorods are deposited at an angle of precisely 45 degrees on top of a thin film of aluminum nitride. Troy, N.Y. -- A team of researchers from Rensselaer Polytechnic Institute has created the world’s first material that reflects virtually no light. Reporting in the March issue of Nature Photonics, they describe an optical coating made from the material that enables vastly improved control over the basic properties of light. Read more »

Technology | Feb 23, 2007

SDK develops new crystal growth technology for GaN-based blue/white LEDs

GaN Crystal Quality Test by XRC Method (MOCVD vs. PPD) Showa Denko K.K. (SDK) has developed a new process for making high-quality compound semiconductors based on gallium nitride (GaN) and other nitrides to meet growing demand mainly for use in blue/white LEDs. Read more »

Technologies | Measurement | Feb 20, 2007

MaxMile Technologies introduces EpiEL mapping system optimized for nitride-based LED applications

epiel2-gif MaxMile Technologies, LLC at Lexington has recently introduced a EpiEL mapping system (EpiEL-700) which is optimized for nitride-based LED applications. Read more »

Technology | Feb 16, 2007

Philips Lumileds LED technology breakthrough fundamentally solves efficiency losses at high drive currents

Philips Lumiled efficiency gain San Jose, CA — Philips Lumileds today announced it has fundamentally solved the problem of “droop”, a phenomenon common to white power LEDs in which efficacy (lumens per watt) decreases as current increases. Read more »

Technology | Jan 31, 2007

Cyberlux Corporation defines breakthrough hybrid organic / inorganic lighting capability

Company’s Exclusive Rights to Hybrid Lighting Technology from University of California-Santa Barbara Combined with Exclusive Rights to Scattered Photon Extraction Technology from Rensselaer Polytechnic Institute Creates Foundation for Sustainable Competitive Advantage. Read more »

Technology | Jan 22, 2007

Bright white beetle dazzles scientists

Dr. Pete Vukusic with Cyphochilus specimens. (Image copyright Pete Vukusic - University of Exeter) An obscure species of beetle could teach us how to produce brilliant white ultra-thin materials, according to a research team led by the University of Exeter. Read more »

Technology | Jan 05, 2007

Cheaper LEDs from breakthrough in ZnO nanowire research

SEM image of p-type ZnO nanowires created by electrical engineering professor Deli Wang at UC San Diego . Note: the blue color was added in photoshop. Credit: Deli Wang/UCSD Engineers at UC San Diego have synthesized a long-sought semiconducting material that may pave the way for an inexpensive new kind of light emitting diode (LED) that could compete with today's widely used gallium nitride LEDs, according to a new paper in the journal Nano Letters. Read more »

Technology | Dec 18, 2006

UC Santa Barbara Researchers Set New Records in Energy Efficient Light Emitting Diodes

Santa Barbara, California USA-- Researchers at UC Santa Barbaras Solid State Lighting & Display Center and the Japan Science & Technology Agencys Exploratory Research for Advanced Technology program (JST ERATO) have set new records for nonpolar and semipolar light emitting diode (LED) efficiency. Read more »

Technology | Dec 12, 2006

Team awarded for better bulb discovery

A team of scientists at Vanderbilt University have been given an award from Popular Mechanics magazine for a discovery that could someday replace the common light bulb, the researchers say. Read more »

Technology | Nov 29, 2006

MIT chemist studies how electrons behave

In a device such as an optical display, positive (purple) and negative (gold) charges are attracted strongly to one another and become trapped (first picture). Because of the unusual rules of quantum physics, the trapped charges can emit light (second picture) if they are spinning in opposite directions. Van Voorhis is creating simulations to show how to selectively create trapped charges in organic light-emitting diode displays to improve efficiency. Image courtesy / Troy Van Voorhis New spin on electrons could improve lights, other devices. Troy Van Voorhis likes to watch how things work. This natural curiosity led to his current research on the behavior of electrons and how they function in various molecular systems, including artificial photosynthesis. Read more »

Technology | Nov 16, 2006

QD Vision improves quantum-dot LED performance

WATERTOWN, Mass., QD Vision, Inc., announced it has achieved significant improvements in efficiency of its red quantum-dot light-emitting devices (QD-LEDs). The trend of improvements in brightness, color, resolution and other metrics continue to advance QD- LEDs toward best-in-class performance levels among display technologies. Read more »

Technology | Nov 16, 2006

Shimei Semiconductor grows blue LED on silicon wafer

shimei-gif "Shimei Semiconductor Co. has developed a blue LED grown on a silicon wafer that it plans to make available by next April. Read more »

Technology | Oct 27, 2006

Organic semiconductors make cheap, flexible photovoltaics and LEDs

Schematic of a junction between two organic semiconductors, an anthracene derivative containing free positive ions and a ruthenium, complex containing negative ions. When the two are joined, ions diffuse across. Imagine T-shirts that light up, or a beach umbrella that collects solar energy to run a portable TV. How about really cheap solar collectors for the roof? All this and more could come from cutting-edge research at Cornell that demonstrates a new type of organic semiconductor device which shows electroluminescence and acts as a photovoltaic cell. Read more »

Technology | Sep 26, 2006

QD Vision chief technologist Seth Coe-Sullivan named top innovator by Tech Review Magazine: MIT journal honors 35 top scientific and technology innovators under the age of 35

WATERTOWN, MA, SQD Vision, Inc. announced that Cofounder and Chief Technologist Seth Coe-Sullivan has been recognized by Technology Review as one of the world’s Top Science and Technology Innovators under the age of 35 for his breakthrough work in quantum dot LED performance and manufacturing process technology. Read more »

Technology | Sep 06, 2006

Japanese scientists have proposed a solution to the puzzle of why blue light-emitting diodes are so bright

bright-20blue-20led-gif Despite huge commercial success, until now the reason for the unusual brightness has not been known. The material they are made from - indium gallium nitride - can only be fabricated to such a poor quality that it would not be expected to emit much light. Read more »

Technology | Aug 25, 2006

Rensselaer researchers aim to close 'green gap' in LED technology

greenled_b-jpg Troy, N.Y. - A team of researchers from Rensselaer Polytechnic Institute has received $1.8 million in federal funding to improve the energy efficiency of green light-emitting diodes (LEDs). Read more »

Technology | Jul 27, 2006

Novel Nano-Etched Cavity Makes LEDs 7 Times Brighter

Etched nanostructured rings around an LED can make it more than seven times brighter. The novel technique developed at NIST may have applications in areas such as in biomedical imaging where LED brightness is crucial. Researchers at the National Institute of Standards and Technology (NIST) have made semiconductor light-emitting diodes (LEDs) more than seven times brighter by etching nanoscale grooves in a surrounding cavity to guide scattered light in one direction. Read more »

Technology | Jul 18, 2006

Paint-on semiconductor outperforms chips

Paint-on semiconductor ( Image from Ted Sargent) Researchers at the University of Toronto have created a semiconductor device that outperforms today's conventional chips -- and they made it simply by painting a liquid onto a piece of glass. Read more »

Technology | Jun 01, 2006

Photonics crystals improve LED efficiency

Figure 1 A 50% increase in efficiency is a significant stride toward being viable sources for solid-state lighting. Read more »

Technology | May 17, 2006

Aluminum Nitride Light Emitting Diodes with the Shortest Wavelength towards Dioxin, PCB Decomposition Technology

Figure1 Aluminum Nitride, "Shortest Light-Emitting Semiconductor" Nippon Telegraph and Telephone Corporation (NTT) has observed light of 210-nm wavelength from aluminum nitride (AlN) light emitting diodes (LED). Read more »

Technology | Feb 16, 2006

Method May Help Optimize Light-emitting Semiconductors

What do you see in these Rorschach-blot-like images? JILA physicists see the once-hidden electronic behavior of semiconductors. The computer plots show how energy intensity (ranging from low in blue to high in red) varies as electronic structures called excitons absorb laser light and emit energy at various frequencies. The pair of similar "butterflies" indicates that an exciton is absorbing and emitting energy in a predictable pattern. Physicists at JILA have demonstrated an ultrafast laser technique for "seeing" once-hidden electronic behavior in semiconductors, which eventually could be useful in more predictable design of optoelectronic devices, including semiconductor lasers and white light-emitting diodes. Read more »

Technology

Electrical Considerations of LED Bulbs

Figure 8: LED bulb with an isolated driving and feedback circuit. Governments all over the world regulated the future use of the inefficient incandescent lamps. For example, the member states of the European Union agreed to a phasing out of incandescent lamps by 2012. The initial European-wide ban applies the first step to “nondirectional” light bulbs. The first types of bulbs to be banned are frosted (non-clear) bulbs and clear bulbs over 100 W, which will be phased out completely by September 2009. The power limit will be moved down to lower wattages, and the efficiency levels raised by the end of 2012. Read more »

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UniDriver® Universal Input Line Voltage LED Drivers

UniDriver® Universal Input Line Voltage LED Drivers LTF Technology’s UniDriver Series offers the ultimate in flexibility and ease of driver selection for lighting industry OEMs and specifiers. These technologically-advanced LED drivers offer True-Tri-Mode dimming from 100V to 277V (ELV, TRIAC, 0-10V), dimming levels from 100% to 0.1%, compatibility ... Read more »

FEATURED

NICHIA LED Technology Presented at LICHTWOCHE München

NICHIA LED Technology Presented at LICHTWOCHE München LED manufacturer NICHIA, a specialist in highly efficient lighting, Human Centric Lighting and the imitation of natural light, will participate in the Munich Lichtwoche 2021 from 5 to 12 November with a light installation, two presentations and a discussion on the topic of UV-C. The light ... Read more »

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