2014-06-24

A Better Light Bulb: Pyramid Scheme for Brighter OLEDs

The most common kind of light bulb in the United States—the incandescent—is only about 5 percent efficient. The phosphorescent organic light-emitting diode, on the other hand, makes light out of 100 percent of the electricity that goes into it.
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2014-06-24

LED Phosphor: Better Red makes Brighter White

In cooperation with Dr. Peter Schmidt of Philips Technologie GmbH in Aachen, a team of researchers led by Prof. Dr. Wolfgang Schnick, who holds the Chair of Inorganic Solid-State Chemistry at LMU Munich, has developed a new material for application in light-emitting diodes (LEDs). “With its highly unusual properties, the new material has the potential to revolutionize the LED market,” says Schnick. The two teams report their results in the latest edition of Nature Materials.
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2014-06-13

The Application of Transparent LED Screen in the Field of Architectural Media

What is architectural media? When we consider the building as the information carrier, that’s it. With the development of LED photoelectric technology, the technology of architectural media has made great progress. During recent years, it has been widely used in the market, but not without problems. After hard and tedious attempts, we have come up with various solutions, especially in the application of glass wall screen. Thus a new super transparent LED screen appeares.With the qualities of super transparence and ultra light, it has obvious advantages in the field of arch...
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2014-05-27

The Future of Blue Light Considering Its Health Concerns

It was 1958, when J. Woodland Hasting and Beatrice M. Sweeney wrote the paper entitled "A persistent diurnal rhythm of luminescence in gonyaulax polydra".  Paper concluded on how lights of different wavelength have the ability to change flow of a hormone named melatonin and hence affecting human body clock, also known as circadian rhythm (as shown in Fig 1).The most powerful wavelength to do so was found to be that of blue.
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2014-05-21

University of Waterloo Develops Cost-effective Nanoparticles to Revolutionize LED Manufacturing

Researchers from University of Waterloo’s Chemistry Department announced they have found the “holy grail” for lighting that could revolutionize LED manufacturing, according to a Canadian media CBC report.
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2014-05-16

KAIST Makes Breakthrough in Nanogenerator Power Efficiency for Wearable Device Applications

The energy efficiency of The Korea Advanced Institute of Science and Technology (KAIST) piezoelectric nanogenerator has increased by almost 40 times, one step closer toward the commercialization of flexible energy harvesters that can supply power infinitely to wearable, implantable electronic devices.
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2014-05-14

UCLA Develops New Thin-film Transistor for LCD and OLEDs

A device created by UCLA researchers could lead to a significant leap in the quality of images on smartphones, computer displays, TVs and inkjet printers.
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2014-05-02

Orthogonal Photolithography makes High-resolution OLED Microdisplays Possible

The realization of OLED technology is contingent upon the development of appropriate materials, processing strategies and device structures which are scalable in terms of their cost, capacity, and capability. During the past decade significant progress has been achieved in the synthesis and characterization of OLED materials. 
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2014-04-29

Swiss Researchers Develop Molybdenite LED that Doubles as Solar Cell

After using it to develop a computer chip, flash memory device and photographic sensor, Ecole Polytechnique Federale de Lausanne (EPFL) scientists have once again tapped into the electronic potential of molybdenite (MoS2) by creating diodes that can emit light or absorb it to produce electricity.
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2014-04-28

Effect of Artificial and Natural light on the Human Body

A lot has been discussed and studied on a bid to understand the most important question - Does light have any effects on human beings?  Light can be categorized into two shades, one being natural: produced by sun while the other is artificial light originating from an electronic display or device.
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2014-04-22

Study Finds LEDs Safe for Skin Applications

There was a time when no one thought about light bulbs—one blew, you screwed another one in. Nowadays, it’s more complicated, as energy efficiency concerns have given rise to a slew of options, including incandescent, compact fluorescent lights, and LEDs.
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2014-04-15

Polish Researchers Develop Highly Efficient Red OLEDs for Lighting and Medical Applications

Researchers worldwide continue search for better luminescent materials for OLED manufacturing. Two new compounds with europium complexes developed at the Institute of Physical Chemistry of the Polish Academy of Sciences in Warsaw display in their class record high luminescence efficiencies in red, and their properties enable faster, low cost manufacturing of thin OLED films.
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2014-04-14

Better Solar Cells, Better LED Light and Vast Optical Possibilities

NTNU researchers Dheeraj Dasa and Helge Weman have, in cooperation with IBM, discovered that gallium arsenide can be tuned with a small strain to function efficiently as a single light-emitting diode or a photodetector. This is facilitated by the special hexagonal crystal structure, referred to as wurtzite, which the NTNU researchers have succeeded in growing in the MBE lab at NTNU. The results were published in Nature Communications this week.
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2014-04-08

Fairchild: Primary Side Regulated Flyback LED Driver with Power Factor Correction

Roy Mi, Senior AE & Technical Marketing Manager at Fairchild Semiconductor introduces the company's LED driver with power factor correction in this latest blog entry. Please see below for more details:
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2014-04-07

DOE: Nanostructures Half a DNA Strand-Wide Show Promise for Efficient LEDs

Nanostructures half the breadth of a DNA strand could improve the efficiency of light emitting diodes (LEDs), especially in the “green gap,” a portion of the spectrum where LED efficiency plunges, simulations at the U.S. Department of Energy’s National Energy Research Scientific Computing Center (NERSC) have shown.
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2014-04-01

All-in-one Smart Opto-medical Device?

Gone may be the days, where the doctor used to pierce needle through the arteries of patient to collect blood sample and test for any perceived ailment.  At this horizon of technology, scientists have been able to investigate, design, manufacture and calibrate new procedures to analyze a particular blood cell organelle without the need of collecting it explicitly.  Not just in the field of cell biology, but smart medical devices are also making their presence felt in the field of tissue imaging, ophthalmology, neuroscience, orthopaedics, and ear cell regenerations as you will learn through this article.
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2014-04-01

The Advantages of Parking Lot Lighting

There are a number of advantages within parking lot lighting than you might have initially thought. These can come in the form of design, professionalism, and security. Just as installing lighting will have advantages in the safety of pedestrians, it can also include advances in design, professional status and attraction of a business. Have a look at the following pro’s of parking lot lighting, and why it is something you should consider.
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2014-03-26

New Technique Makes LEDs Brighter, More Resilient

Researchers from North Carolina State University have developed a new processing technique that makes light emitting diodes (LEDs) brighter and more resilient by coating the semiconductor material gallium nitride (GaN) with a layer of phosphorus-derived acid.
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2014-03-19

Scientists Open a New Window into Quantum Physics with Superconductivity in LEDs

A team of University of Toronto physicists led by Alex Hayat has proposed a novel and efficient way to leverage the strange quantum physics phenomenon known as entanglement. The approach would involve combining light-emitting diodes (LEDs) with a superconductor to generate entangled photons and could open up a rich spectrum of new physics as well as devices for quantum technologies, including quantum computers and quantum communication.
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2014-03-13

Scientists Build Thinnest LEDs

Most modern electronics, from flat-screen TVs and smartphones to wearable technologies and computer monitors, use tiny light-emitting diodes, or LEDs. These LEDs are based off of semiconductors that emit light with the movement of electrons. As devices get smaller and faster, there is more demand for such semiconductors that are tinier, stronger and more energy efficient.
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2014-03-10

OJI Establishes Fine-Structure Novel Fabrication Manufacturing Technology for Sapphire Substrate for LEDs

Oji Holdings Corporation has established the fabrication technology of patterned sapphire substrates (PSS) for LEDs which improves the performance of front luminance of LEDs by more than double compared to that of LEDs with non-structured sapphire substrate, by applying the technique of precise coating with fine particles.
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2014-03-07

Fairchild Semiconductor: Low Power LED Market Trends and Applications

Fairchild Semiconductor recently released a white paper on low power LED market and applications. The paper is written by the company’s Lighting Specialist Brian Johnson and Marketing Specialist James Lee. Below is an excerpt from the paper:
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2014-03-06

Harvest Electricity through LEDs with one Stomp

With one stomp of his foot, Zhong Lin Wang illuminates a thousand LED bulbs – with no batteries or power cord. The current comes from essentially the same source as that tiny spark that jumps from a fingertip to a doorknob when you walk across carpet on a cold, dry day. Wang and his research team have learned to harvest this power and put it to work.
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2014-03-06

Gallium Nitride makes LED Lamps more Compact

Coping with higher temperatures LEDs do have one weakness, though – they are extremely sensitive to variations and spikes in power. To function properly, they need a driver that ensures a constant supply of power at all times. This driver, which takes the alternating current from the grid and converts it into direct current with a reduced voltage, has a profound influence on the light yield and lifetime of the LED lamp as a whole. The demands placed on the driver electronics are correspondingly high. This has prompted researchers at the Fraunhofer Institute for Appli...
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2014-02-28

Use of LED’s in Endoscopy and Laparoscopy

It was 1950 when Mr. Hopkins met Dr. Hugh Gainsborough, a gatroentreroligst at St. George’s Hospital London, where he was put forth with a challenge of illumination while operating within abdomen.  By 1954, Hopkins invented flexible glass rods which transmitted light from external light source to the inspecting tissue residing within the body of patient, which came to be known as rod lens system.  Concurrently early 1950 saw the birth of fibre optic light transmitting system which revolutionized the field of communication.
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2014-02-25

NRL Roadmap to Efficient Green-Blue-Ultraviolet LEDs

Scientists at the U.S. Naval Research Laboratory (NRL) have suggested a method that could significantly increase the efficiency of green-blue-ultraviolet light-emitting diodes based on GaInN/GaN, AlGaN/GaN, and AlInN/GaN quantum wells. Their approach could enable advances in solid state lighting and the creation of low threshold lasers and high power light LEDs. Their research is published in the January 25 and November 26, 2013 issues of Applied Physics. 
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2014-02-19

UPM Makes Progress in Water Contaminant Detection with UV LED Device

Researchers at Technical University of Madrid (UPM) are working in the development of hydrocarbons early detection devices for rivers in order to prevent contamination that could seriously affect the environment.
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2014-02-18

Quantum Dots Provide Complete Control of Photons

By emitting photons from a quantum dot at the top of a micropyramid, researchers at Linköping University are creating a polarized light source for such things as energy-saving computer screens and wiretap-proof communications.
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2014-02-07

Texas Instruments: Multi-string LED Lighting Systems and Top Four Linear Regulator Questions

Joe DeNicholas, Product Line Manager, Lighting Power Products, Texas Instruments (TI) tackles some common issues in Multi-string LED lighting systems in this blog entry.
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2014-02-03

New Possibilities for OLED Based on a Single-Molecule LED

Research by Gaël Reecht, Fabrice Scheurer, Virginie Speisser and et al from University of Strasbourg, France luminescence can be achieved by a single polymer molecule, which could be the smallest possible OLED device, according to Physic Review article. Below is the synopsis for the report on Physical Review Letters by Don Monroe :
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ProLight, a Taiwan high power LED packaging house, introduced the latest E series products which can be driven to higher drive current. E series adopts ProLight’s patented High Thermal Eutectic Technology. The eutectic material that... READ MORE

Philips Hue Phoenix from Royal Philips, the global leader in lighting, is the first in a new range of white ambience connected lamps that allow you to create the right light for different moments at home. From helping you to create a cozy atmo... READ MORE