2016-10-18

Decoding Micro-LED’s Current Driving Methods

Micro-LED a light emitting diode driven by electric currents, similar to traditional LEDs in display applications it can be driven using passive matrix or active matrix. A third current driving method is the new semi-active matrix driver, which uses a completely different method compared to existing models. Below we will introduce three different circuit designs and their basic theories.
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2016-10-11

Fraunhofer HHI and Partners Develop Plastic Based Photonic Chips for Various Applications

"Great in Optics –Small in Size!" The growing core of the “PolyPhoton- ics” Innovation Initiative will take this motto to the global communica- tions market. The project is part of the “Regional Enterprise Initiative”of the German Federal Ministry of Research. The consortium develops the value chain for the creation of a new technology platform. The Fraunho- fer Heinrich Hertz Institute HHI coordinates the project.
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2016-10-05

Dartmouth Researchers Develop VLC System that Can Transmit Data in the Dark

With the rise in wearables such as smartwatches and fitness trackers that rely on smart sensors, and the continued popularity of smartphones, smart devices are taking our country by storm. Wireless data for such devices is typically beamed through Wi-Fi or Bluetooth, yet, the new wireless communication technology of "visible light communication (VLC)," has emerged as a new option albeit with limitations due to the challenges it faces in practice, such as being easily blocked or not being able to sustain transmission when light is off. Through a new Dartmouth project called "DarkLight," researchers have developed and demonstrated for the first-time, how visible light can be used to transmit data even when the light appears dark or off. DarkLight provides a new communication primitive similar to infrared communication, however, it exploits the LED lights already around us rather than needing additional infrared emitters.
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2016-09-29

Single Photon LEDs for On-Chip Integration

​Researchers from the Graphene Flagship use layered materials to create an all-electrical quantum light emitting diodes (LED) with single-photon emission. These LEDs have potential as on-chip photon sources in quantum information applications.
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2016-09-29

Researchers Find New Form of Light

Glow-in-the-dark stickers, weird deep-sea fish, LED lightbulbs — all have forms of luminescence. In other words, instead of just reflecting light, they make their own
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2016-09-26

Holst Center Releases OLED on Ceramic Substrate

Dutch R&D institute Holst Centre (set up by imec and TNO) and American ultra-thin ceramics supplier ENrG Inc. have created the first ever ceramic-based, large-area flexible OLED. The device, manufactured on the 20-40 µm thick Thin E-Strate® ceramic substrate, promises a lifetime in excess of 10 years without the formation of blackspots. The ceramic carrier is also easy to handle and capable of withstanding the high temperatures used in display backplane manufacturing and standard sintering processes.
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2016-09-13

Scientists Develop Invisibility Cloak With Photonic Crystals

Almost as elusive as unicorns, finding practical materials for invisibility cloaking is challenging. Michigan Technological University researchers have new ideas how to solve that.
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2016-09-12

TI Releases High Efficiency Tunable White LED DC-Driver with Bluetooth Connectivity Reference Design

The TIDA-01096 TI design is a tested DC-DC LED driver sub system for tunable white LED luminaires. It is built-on a wireless SoC platform which can enable intensity adjustment (dimming) and co-related color temperature (CCT) control using any BLE smart device. Tunable white light luminaires simulate daylight conditions. With a separate warm-white and cold-white LED string, it allows CCT tuning and thereby helps achieving proper circadian stimulation. TI design TIDA-01096 provides high efficiency DC-DC conversion and allows dimming and color temperature control over more than 1:50 and 1:500 range using analog and PWM methods.
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2016-09-08

New Perovskite Research Findings Could Advance Solar Cell and LED Technology

“Promising” and “remarkable” are two words U.S. Department of Energy’s Ames Laboratory scientist Javier Vela uses to describe recent research results on organolead mixed-halide perovskites.
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2016-09-05

How to Turn Green Light Blue

The upconversion of photons allows for a more efficient use of light: Two photons are converted into a single photon having higher energy. Researchers at KIT now showed for the first time that the inner interfaces between surface-mounted metal-organic frameworks (SURMOFs) are suited perfectly for this purpose - they turned green light blue. The result, which is now being published in the Advanced Materialsjournal, opens up new opportunities for optoelectronic applications such as solar cells or LEDs. (DOI: 10.1002/adma.201601718)
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2016-09-01

Scientists Find Light Can Exist in a New Form

New research suggests that it is possible to create a new form of light by binding light to a single electron, combining the properties of both.
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2016-08-26

Fraunhofer Institute Tests OLEDs for Light Therapy

Cytocompatibility studies of organic light-emitting diodes (OLEDs) have been carried out on cell cultures for the first time at the Fraunhofer FEP to test how well OLEDs are tolerated by cells. The results offer promising prospects for the use of OLEDs in the medical field, such as in light therapy. The findings will be published in a white paper entitled “Preliminary cytocompatibility studies for encapsulated OLEDs” and likewise be presented at the 4th Industry Partners Day of the Fraunhofer FEP in Dresden on Sept. 28, 2016.
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2016-08-15

KAUST Laser-based Li-Fi Reaches 2GB Data Speed Transmission Milestone

While Wi-Fi and Bluetooth are now well established technologies, there are several advantages gained by shortening the wavelength of the electromagnetic waves used for transmitting information.
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2016-08-10

Are "Plug and Play" Control-integrated Luminaires Ready for Prime Time?

In a large open office on the fourth floor of the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute, lighting scientist Leora Radetsky lifts the blinds and lets in the sunlight. The overhead LED luminaires dim in response, fluidly, maintaining consistent light levels on the desk spaces. She lowers the blinds and the luminaires instantaneously increase light levels in response.
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2016-08-10

Osram Participates in Research for Finding New Rare-earth-reduced White LEDs

Rare-earth metals, which are needed for dyes and phosphor converters in light emitting diodes, are a finite resource. Osram Opto Semiconductors, as one of four partners in the “ORCA” project, is therefore researching and developing new types of organic dyes and inorganic phosphor converters. The aim of this project, which began on May, 2016, is to reduce the volume of these materials by developing new solutions, and to encourage the implementation of these solutions in actual production.
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2016-08-09

Liquid Light Switch Enables More Powerful Electronics

Researchers have built a miniature electro-optical switch which can change the spin -- or angular momentum -- of a liquid form of light by applying electric fields to a semiconductor device a millionth of a meter in size. Their results, reported in the journal Nature Materials, demonstrate how to bridge the gap between light and electricity, which could enable the development of ever faster and smaller electronics.
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2016-08-04

LEDs Fuel Ultra-accurate Indoor GPS System

An indoor positioning system that uses LED lighting to pinpoint location is being developed for use in the retail industry.
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2016-08-01

Researchers Make Green LEDs Brighter and More Efficient

Researchers at the University of Illinois at Urbana Champaign have developed a new method for making brighter and more efficient green light-emitting diodes (LEDs). Using an industry-standard semiconductor growth technique, they have created gallium nitride (GaN) cubic crystals grown on a silicon substrate that are capable of producing powerful green light for advanced solid-state lighting.
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2016-08-01

CLTC Research Addresses Integrated Building Control Systems

California Lighting Technology Center (CLTC) of UC Davis is developing an integrated building control system for existing commercial buildings. To date, few research efforts have accounted for the interdependence of lighting, fenestration and HVAC systems and the consideration of HVAC status in an integrated approach to optimize whole building energy-efficiency via a single, unified control platform. 
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2016-07-28

Bridgelux:Seeing Ourselves in New Light

Gina Balestin, Senior Corporate Marketing Manager at Bridgelux, shares in this blog entry the importance of LED color temperature.
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2016-07-26

Samsung OLED Displays Enhances Wearables

As the post-mobile era takes shape, we are beginning to see smart calling and imaging devices increasingly interconnected and even remotely controlled. The list of connected devices continues to grow – including everything from smartphones, wearable devices and information-focused consumer electronics, to electronics that are embracing the Internet of Things like smart home appliances and security monitoring systems.
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2016-07-25

University of Utah Engineer Receives Top Research Award for Work in LEDs

University of Utah Distinguished Professor Gerald Stringfellow, a former dean of the university's College of Engineering and a pioneer in LED technology, has been awarded a top research prize for his career-long work in the process for making light-emitting diodes, an important milestone for LED TVs, cellphone screens, high-efficiency solar cells, computer monitors and a new wave of LED light bulbs.
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2016-07-22

Researchers Develop Precise Silica Coating for QD Nanorods

Materials researchers at North Carolina State University have fine-tuned a technique that enables them to apply precisely controlled silica coatings to quantum dot nanorods in a day – up to 21 times faster than previous methods. In addition to saving time, the advance means the quantum dots are less likely to degrade, preserving their advantageous optical properties.
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2016-07-20

Australian Researchers Dope Nanolasers to Improve Efficiency

Scientists at ANU have improved the performance of tiny lasers by adding impurities, in a discovery which will be central to the development of low-cost biomedical sensors, quantum computing, and a faster internet.
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2016-07-12

DOE: Eight Facts about LEDs

Want to know more about the different lighting options available? Check out our Energy Saver lighting topic page to learn about lighting choices that will save you money, when to turn off your lights and more.
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2016-07-07

Researchers Develop Mid-IR Laser System for Detecting Atmospheric Chemicals

Researchers at MIT and elsewhere have found a new way of using mid-infrared lasers to turn regions of molecules in the open air into glowing filaments of electrically charged gas, or plasma. The new method could make it possible to carry out remote environmental monitoring to detect a wide range of chemicals with high sensitivity.
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2016-07-06

MIT Develops Color Changing Fluorescent Polymer Gels for Sensors

Researchers at MIT are making fluorescent polymer gels that change color when they’re shaken, heated, exposed to acid, or otherwise disrupted. Given such a response, these novel materials could be effective sensors for detecting changes in structures, fluids, or the environment.
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2016-07-04

Osram:New Goals for LED Stadium Lighting

Aside from increasing the visual playing conditions for both players and spectators, as well as minimising shadows, stadium lighting is also under strict guidelines enforced by associations such as Union of European Football Associations. This guarantees that experiences of those watching a match on television have the same viewing experience as those watching inside the stadium. If football is truly seen as the “beautiful game”, then the necessity to provide audiences consistent and true-to-life visual experiences is crucial.
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2016-06-28

Soraa Discusses Color Enhancing of LED Sources

After Aurelien David, Soraa's Chief Scientist, released the last blog’s primer on the concept of color saturation, he takes a look at its implementation in products. For simplicity, David’ll talk about “enhancing” colors in this post—what he really mean is “increasing the saturation” of colors, an effect which tends to be well-liked in some situations.
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2016-06-27

Japanese Researchers Demonstrate Two Types of RGB Laser Diodes

As part of a NEDO project, Osaka University and Shimadzu Corporation have developed two new types of RGB laser light source modules, including a world-class high-brightness model and an ultra-miniaturized model, and demonstrated their effectiveness mounted on actual devices with the aim of expanding the application of visible light laser diodes.
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LEDs in automotive front lighting enable energy savings, new light designs and applications such as matrix beam and laser high-beam. Supporting the progress in automotive lighting Infineon Technologies AG (FSE: IFX / OTCQX: IFNNY) launched hig... READ MORE

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