Trends

Trends

Technology | Oct 27, 2011
Competing LEDs: High-quality White Light Produced by Four-Color Laser Source
Competing LEDs: High-quality White Light Produced by Four-Color Laser Source The human eye is as comfortable with white light generated by diode lasers as with that produced by increasingly popular light-emitting diodes (LEDs), according to tests conceived at Sandia National Laboratories. Both technologies pass electrical current through material to generate light, but the simpler LED emits lights only through spontaneous emission. Diode lasers bounce light back and forth internally before releasing it. Read more »
Technology | Oct 18, 2011
The True Knowledge About White LEDs and Our Biological Clocks
The True Knowledge About White LEDs and Our Biological Clocks You come into contact every day with light-emitting diodes (LEDs) - they illuminate alarm clocks, new televisions, traffic lights, and smartphone displays. Increasingly, you will see white-light versions of LEDs becoming available for energy-efficient home lighting, car headlights, and streetlamps. But how does that affect our organism? Read more »
Technology | Oct 17, 2011
609 nm Red LED Prototype from OSRAM Opto Semiconductors Achieves Record Efficiency
609 nm Red LED Prototype from OSRAM Opto Semiconductors Achieves Record Efficiency A red high-power LED has set a new efficiency record in an OSRAM Opto Semiconductors R&D lab with an electro-optical efficiency of 61%. The 1 mm2 chip housed on a laboratory package emits at a wavelength of 609 nm (λ-dom) and has achieved a record value of 201 lm/W at an operating current of 40 mA. At a typical operating current of 350 mA its luminous efficacy is still an impressive 168 lm/W, which means that even at this high wattage more than half of the electrical energy is converted into light. Read more »
Technology | Sep 21, 2011
SEMI Announces Formation of India SSL Special Interest Group
Today SEMI India announced the formation of a Special Interest Group on high-brightness light-emitting diodes (HB-LEDs) and solid state lighting (SSL). The new SEMI SSL Special Interest Group in India will focus on materials, equipment and manufacturing issues to further promote the industry— through cost reduction, quality improvement, supply chain development, and industry promotion. The new group comprises both SEMI members and key industry leaders in the HB-LED/SSL market. Read more »
Technology | Aug 24, 2011
R&D of Printoptical Innovator LUXeXceL Made Enormous Progress
R&D of Printoptical Innovator LUXeXceL Made Enormous Progress LUXeXceL's R&D department managed to print concave lenses for light diverging. The research process to control the inward gradient shape of a typical concave lens is finished successfully, resulting that the printing of concave lenses is now in the final development stage and commercially available. Read more »
Technology | Aug 10, 2011
BRIDGELUX Boost Efficiency Record for GaN-on-Silicon Technology LEDs to 160lm/W
BRIDGELUX Boost Efficiency Record for GaN-on-Silicon Technology LEDs to 160lm/W Bridgelux Inc., a leading developer and manufacturer of LED lighting technologies and solutions, has shattered its previous industry record for highest Lumen per Watt values for Gallium Nitride on Silicon (GaN-on-Si). Using its proprietary buffer layer technology, the company has demonstrated growth of crack-free GaN layers on 8-inch silicon wafers, without bowing at room temperature, extending the company’s lead in driving the performance and manufacturability of GaN LEDs on silicon substrate. Read more »
Technology | Aug 02, 2011
Independent Research using Xicato Spot Modules: Link Between Light Quality and the Attraction of Retail Displays
Independent Research using Xicato Spot Modules: Link Between Light Quality and the Attraction of Retail Displays There is a strong link between the quality of accent light sources, in terms of color rendering ability and in particular the rendering of deep reds, and the attention-grabbing potential of retail displays, according to the outcome of an on-site evaluation by end-users and lighting designers conducted by independent researcher, Colette Knight and peer reviewed by University College London. Shoppers and lighting designers took part in the experiment carried out in a House of Fraser store in London. It showed that there was no statistical difference between the appreciation of colors rendered with halogen or Ra 95 (R9 >95) LED sources, whereas the rating was lower for Ra 80 (R9<20) LED sources. This translated directly into the rating of the display itself in terms of its attraction. Read more »
Technology | Aug 02, 2011
Cree Prototype Exceeds DOE’s 21st Century Lamp L Prize Requirements
Cree Prototype Exceeds DOE’s 21st Century Lamp L Prize Requirements Demonstrating the future of lighting, Cree, Inc. today unveiled a concept LED light bulb from its lighting research and development team. Redefining what is possible with high-performance LED lighting, the lamp delivers more than 1,300 lumens at 152 lumens per watt (LPW) using Cree TrueWhite® Technology. Cree’s prototype LED light bulb exceeds the performance goals set by the U.S. Department of Energy (DOE) for the 21st Century Lamp, the third category in its L Prize competition. Read more »
Technology | Jul 26, 2011
New 3-D Photonic Crystal has both Electronic and Optical Properties
New 3-D Photonic Crystal has both Electronic and Optical Properties In an advance that could open new avenues for solar cells, lasers, metamaterials and more, researchers at the University of Illinois have demonstrated the first optoelectronically active 3-D photonic crystal. To test their technique, the group built a 3-D photonic crystal LED the first such working device. Read more »
Technology | Jul 15, 2011
Studies Published on Flicker Perception from SSL Systems - ASSIST to Release Related Recommendation
Studies Published on Flicker Perception from SSL Systems - ASSIST to Release Related Recommendation Flicker and stroboscopic effects have been a concern with solid-state lighting (SSL), and industry and the ENERGY STAR program have debated recently the effects of frequency and other driving modes on the perception and acceptability of flicker. To provide further data and guidance in this area, the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute has conducted human factors studies of flicker that were recently published in the Lighting Research and Technology journal. The studies, funded by the Alliance for Solid-State Illumination Systems and Technologies (ASSIST), will become the basis for future ASSIST recommends guidelines on flicker from SSL systems. Read more »
Technology | Jul 12, 2011
RoseStreet Labs Scientists Demonstrate First Long Wavelength LED Based on InGaN On Silicon Technology
RoseStreet Labs Scientists Demonstrate First Long Wavelength LED Based on InGaN On Silicon Technology RoseStreet Labs, (RSL), announced today the world’s first demonstration of a long wavelength LED device utilizing low cost silicon wafer substrates. Green and longer wavelength LEDs have been sought after by both science and industry for an extensive period of time because they would fill a high-value gap in the rapidly growing global LED market for lighting and illumination where energy efficiency, low cost and miniaturization are critical product characteristics. Read more »
Technology | Jun 22, 2011
Researcher from the University of Miami Helps Create a Smaller, Flexible LED
University of Miami professor at the College of Engineering, Jizhou Song, has helped design an light-emitting diode (LED) light that uses an array of LEDs 100 times smaller than conventional LEDs. The new device has flexibility, maintains lower temperature and has an increased life-span over existing LEDs. The findings are published online by the "Proceedings of the National Academy of Sciences." Read more »
Technology | Jun 16, 2011
OLED: Record-Breaking Efficiency News from Osram - 87lm/W
OLED: Record-Breaking Efficiency News from Osram - 87lm/W Technological breakthrough at OSRAM: researchers and developers have achieved a new efficiency record in the laboratory for OLED. The laboratory sample achieves 87 lm/W, significantly exceeding the current peak value. And the most important thing: the laboratory sample is highly proximate to the product, thus paving the way for highly energy-efficient OLED products with considerably higher brightness. Read more »
Technology | May 11, 2011
Osram Applies “Brilliant-Mix” LED Concept to Parathom Pro Classic A 80 LED Lamp and PrevaLED System
Osram Applies “Brilliant-Mix” LED Concept to Parathom Pro Classic A 80 LED Lamp and PrevaLED System Warm white light with a high luminous efficacy (110 lm/W) and a color rendering index (CRI) of more than 90 are the result of the new “Brilliant-Mix” concept from OSRAM Opto Semiconductors. The intelligent color mix based on powerful Oslon SSL LEDs in EQ-White and Amber covers a broad white spectrum from 2700 to 4000 K. Depending on the required luminous flux, a different number of these LEDs can be combined to produce warm white feel-good light of high quality that will set new standards in general illumination applications. Read more »
Technology | May 10, 2011
Cree Announces New Efficacy Record in Lab: 231 Lumen Per Watt
Cree Announces New Efficacy Record in Lab: 231 Lumen Per Watt Cree, Inc., a market leader in LED lighting, reports another industry-best efficacy record of 231 lumens per watt for a white power LED. This result is a significant advance beyond Cree’s previous industry record and further demonstrates how Cree’s relentless innovation continues to push the boundaries of what is possible with LED lighting. Read more »
Technology | Apr 21, 2011
Theorists from UC Santa Barbara Claim that LED Efficiency Puzzle Is Solved
Theorists from UC Santa Barbara Claim that LED Efficiency Puzzle Is Solved Researchers at the University of California, Santa Barbara, say they’ve figured out the cause of a problem that’s made light-emitting diodes (LEDs) impractical for general lighting purposes. Their work will help engineers develop a new generation of high-performance, energy-efficient lighting that could replace incandescent and fluorescent bulbs. Read more »
Technology | Mar 16, 2011
From the OSRAM Laboratory: Efficiency Record for Warm White
From the OSRAM Laboratory: Efficiency Record for Warm White OSRAM Opto Semiconductors has set a new laboratory record of 142 lm/W for the efficiency of a warm white LED light source. With a correlated color temperature (CCT) of 2755 K the LED achieves a good color rendering index (CRI) of 81. Measurements were taken under standard conditions: room temperature and pulsed mode at an operating current density of 350 mA/mm². Read more »
Technology | Feb 15, 2011
Jewel-Toned Organic Phosphorescent Crystals: A New Class of Light-Emitting Material
Jewel-Toned Organic Phosphorescent Crystals: A New Class of Light-Emitting Material University of Michigan researcher Jinsang Kim and his colleagues have developed a new class of material that shines with phosphorescence—a property that has previously been seen only in non-organic compounds or organometallics. This pure organic compounds that glow in jewel tones could potentially lead to cheaper, more efficient and flexible display screens, among other applications. Read more »
Technology | Jan 31, 2011
A Material to Revolutionize Electronics - Small Transistors, LEDs and Solar Cells
A Material to Revolutionize Electronics - Small Transistors, LEDs and Solar Cells A discovery made at EPFL could play an important role in electronics, allowing us to make transistors that are smaller and more energy efficient. Research carried out in the Laboratory of Nanoscale Electronics and Structures (LANES) has revealed that molybdenite, or MoS2, is a very effective semiconductor. This mineral, which is abundant in nature, is often used as an element in steel alloys or as an additive in lubricants. But it had not yet been extensively studied for use in electronics. Read more »
Technology | Jan 26, 2011
Voiding Defects: New Technique Makes LED Lighting More Efficient
Voiding Defects: New Technique Makes LED Lighting More Efficient Light-emitting diodes (LEDs) are an increasingly popular technology for use in energy-efficient lighting. Researchers from North Carolina State University have now developed a new technique that reduces defects in the gallium nitride (GaN) films used to create LEDs, making them more efficient. Read more »
Technology | Jan 18, 2011
Intematix Introduces ChromaLit™ Remote Phosphor Lighting Systems
Intematix Introduces ChromaLit™ Remote Phosphor Lighting Systems ChromaLit™ leverages a phosphor composite precisely layered onto a substrate, separated from the blue LED energy source. The independent phosphor emits light when excited by blue light. Because the phosphor has been separated from the energy source and can now be made in any shape and any color, unidirectional light, hot spots, inconsistency and design limitations are no longer SSL challenges. Read more »
Technology | Dec 22, 2010
Quantum Dots Are Not Dots
Quantum Dots Are Not Dots Researchers from the Quantum Photonics Group at DTU Fotonik in collaboration with the Niels Bohr Institute, University of Copenhagen surprise the scientific world with the discovery that light emission from solid-state photon emitters, the so-called quantum dots, is fundamentally different than hitherto believed. The new insight may find important applications as a way to improve efficiency of quantum information devices. Their findings are published on December 19th 2010 in the prestigious journal Nature Physics. Read more »
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