LEDs & OLEDs

Technologies | Light Generation | LEDs | Color LEDs | Mar 29, 2018
Scientists Reveal the Fundamental Limitation of In Concentration in InGaN Solid-State Devices
Scientists Reveal the Fundamental Limitation of In Concentration in InGaN Solid-State Devices For the first time an international research group has revealed the core mechanism that limits the indium (In) content in indium gallium nitride ((In, Ga)N) thin films - the key material for blue light emitting diodes (LED). Increasing the In content in InGaN quantum wells is the common approach to shift the emission of III-Nitride based LEDs towards the green and, in particular, red part of the optical spectrum, necessary for the modern RGB devices. The new findings answer the long-standing research question: why does this classical approach fail, when we try to obtain efficient InGaN-based green and red LEDs? Read more »
Technologies | Light Conversion | LEDs | Quantum Dots | Feb 26, 2018
Realizing Highly Efficient QD LEDs with Metallic Nanostructures at Low Cost
Realizing Highly Efficient QD LEDs with Metallic Nanostructures at Low Cost The Korea Advanced Institute of Science and Technology (KAIST) announced that a team of their researchers have discovered a technology that enhances the efficiency of Quantum Dot LEDs. Professor Yong-Hoon Cho from the Department of Physics and his team succeeded in improving the efficiency of Quantum Dot (QD) Light-Emitting Diodes (LEDs) by designing metallic nanostructure substrates. Read more »
Technologies | Light Generation | Phosphors | Feb 22, 2018
Supercomputers Aid Discovery of New, Inexpensive Material to Make LEDs with Excellent Color Quality
Supercomputers Aid Discovery of New, Inexpensive Material to Make LEDs with Excellent Color Quality A team led by engineers at the University of California San Diego has used data mining and computational tools to discover a new phosphor material for white LEDs that is inexpensive and easy to make. Researchers built prototype white LED light bulbs using the new phosphor. The prototypes exhibited better color quality than many commercial LEDs currently on the market. Read more »
Resources | IP Snapshot | LEDs | Nanowire | Feb 01, 2018
IP Snapshot: "Nanowired LEDs"
IP Snapshot: "Nanowired LEDs" Abstract from the most cited patent (US20030168964A1, Solidlite Corp.) A nanowire light emitting device and display includes a cover substrate , and a transparent conductive substrate mounted on the transparent conductive film and having a surface plated with a metal layer, a nanowire light emitting member mounted on the transparent conductive substrate and having multiple nanowire light emitting diodes each having a structure of P-type, N-type and light emitting layer, and an insulation layer support post mounted between the transparent conductive substrate and the cover substrate for supporting the transparent conductive substrate and the cover substrate. Read more »
Resources | Tech-Talks Bregenz | Research | Light Generation | Jan 15, 2018
Tech-Talks BREGENZ - Julia Frohleiks, Researcher, University of Duisburg-Essen
Tech-Talks BREGENZ - Julia Frohleiks, Researcher, University of Duisburg-Essen In his commentary on technical progress and innovation, Dr. Sejkora said: “In the early stage, in the first phase of its life cycle, technology is mainly driven by fundamental research.” He went on to say that we can never predict how a technology will develop. Researchers from the University of Duisburg-Essen, working in the Nano Energy Technical Center (NETZ), worked on this type of fundamental technology and their submission received the LpS 2017 Scientific Award. Ms. Julia Frohleiks, a Ph.D. student, was a major contributor to this research in the group led by Dr. Ekaterina Nannen and accepted the award in Dr. Nannen’s name. In the following interview she gives some background information and discloses future research possibilities. Read more »
Technologies | LEDs | Light Generation | Dec 13, 2017
Atomistic Calculations Predict that Boron Incorporation Increases the Efficiency of LEDs
Atomistic Calculations Predict that Boron Incorporation Increases the Efficiency of LEDs High-power white LEDs face the same problem that Michigan Stadium faces on game day -- too many people in too small of a space. Of course, there are no people inside of an LED. But there are many electrons that need to avoid each other and minimize their collisions to keep the LED efficiency high. Using predictive atomistic calculations and high-performance supercomputers at the NERSC computing facility, researchers Logan Williams and Emmanouil Kioupakis at the University of Michigan found that incorporating the element boron into the widely used InGaN (indium-gallium nitride) material can keep electrons from becoming too crowded in LEDs, making the material more efficient at producing light. Read more »
Resources | LpR Article | Technologies | Light Generation | Tunable White Light | Oct 31, 2017
A New Technology Is Changing the Tunable White Solutions
A New Technology Is Changing the Tunable White Solutions Tunable white LEDs are one key element of human centric lighting. Until today, different solutions are currently available but none of them is easy to apply or cost effective enough to speed up the diffusion of human centric lights in building projects. A new approach for tunable white solutions is able to provide flexible lighting for multiple occasions without sacrificing output or going over project budget. Phil Lee, Senior Lighting Engineer from Meteor Lighting will compare this new technology, called ColorFlip™, to conventional tunable white solutions, and talk about current tunable white issues. Read more »
Resources | LpR Article | Research | Light Generation | Oct 31, 2017
Hybrid Quantum Dot Light Emitting Electrochemical Cells
Hybrid Quantum Dot Light Emitting Electrochemical Cells Several new light generation technologies that are overshadowed by LEDs and OLEDs are investigated. Most of these technologies are in a very early stage of research. One such technology, the LEC technology, was presented at LpS 2017. Light emitting electrochemical cells can be compared to OLEDs, but they are based on a much simpler inorganic architecture. The innovation in the presented approach lies in the combination with quantum dots, resulting in a hybrid solution. This novel attempt with all its consequences and future prospects was the reason that the LpS Scientific Award jury voted to bestow the award on Dr. Ekaterina Nannen, Group Leader of the Research Group „Solid State Lighting“ at the Nano-Energie-Technik- Zentrum (NETZ) of the University Duisburg-Essen and her research team, Julia Frohleiks and Svenja Wepfer. Read more »
Technologies | LEDs | Light Generation | Automotive | Oct 02, 2017
Eviyos LED Prototype Revolutionizes Smart Headlights
Eviyos LED Prototype Revolutionizes Smart Headlights The Eviyos prototype developed by Osram Opto Semiconductors is the world’s first hybrid LED and represents major progress toward the first market-ready smart controllable high-resolution LED. As soon as oncoming traffic is detected the appropriate pixels are automatically switched off so drivers of oncoming vehicles are not dazzled. The prototype, integrated in a demonstrator from Osram Specialty Lighting, were on show for the first time at ISAL from September 25 through 27, 2017 in Darmstadt. Read more »
Technologies | OLEDs | Flexible OLEDs | Sep 21, 2017
OLEDs Applied to Paper-Thin Stainless Steel
OLEDs Applied to Paper-Thin Stainless Steel Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, a provider of R&D in the field of organic electronics, will be presenting OLEDs on gauzy stainless steel foil during aimcal 2017 in Tampa/USA, from October 15-18, 2017. The novel application on display in Booth 22 was developed in cooperation with the Nippon Steel & Sumikin Materials Co., Ltd. (NSMAT) and Nippon Steel & Sumitomo Metal Corporation (NSSMC). Read more »
Technologies | LEDs | Light Generation | Sep 15, 2017
Tracing the Light Inside an LED
Tracing the Light Inside an LED The performance of white LEDs can be improved, based on better knowledge of the absorption and scattering of light inside the LED. A new method, developed by the University of Twente in The Netherlands and Philips Lighting, can lead to efficiency improvement and powerful design tools. Read more »
Technologies | LEDs | Light Generation | Sep 15, 2017
Nanoparticles Could Spur Better LEDs, Invisibility Cloaks
Nanoparticles Could Spur Better LEDs, Invisibility Cloaks In an advance that could boost the efficiency of LED lighting by 50 percent and even pave the way for invisibility cloaking devices, a team of University of Michigan researchers has developed a new technique that peppers metallic nanoparticles into semiconductors. Read more »
Light Generation | Technologies | OLEDs | Flexible OLEDs | Sep 12, 2017
Flexible OLEDs with Adjustable Colors – New Design Options for Lighting Designers
Flexible OLEDs with Adjustable Colors – New Design Options for Lighting Designers The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, one of the leading R&D partners for surface technologies and organic electronics, specializes in the development and fabrication of OLED modules with unconventional properties for specific client designs. The Institute will debut flexible adjustable-color organic light-emitting diodes (OLEDs) at ISAL 2017 in Darmstadt, Germany from September 25-27, 2017 at its booth (No. 31). Read more »
Resources | LpR Article | Technologies | Light Conversion | Quantum Dots | Sep 12, 2017
Quantum Dot Based White LEDs for General Illumination
Quantum Dot Based White LEDs for General Illumination Colloidal quantum dot based white LEDs can be integrated into commercial products meeting the stringent reliability requirements for general illumination and providing LED efficiency gains of 5% to 15% over commercial phosphor based LEDs at CCT’s ranging from 5000 K to 2700 K. Unlike earlier demonstrations, the QD material is applied in an on-chip configuration resulting in drop-in fit, form, and function compatibility to existing LED based luminaires and lamps. Ken T. Shimizu, Director, Novel Technologies and Devices, Research and Development, M. Böhmer, D. Estrada, S. Gangwal, S. Grabowski, H. Bechtel, E. Kang, K. J. Vampola, D. Chamberlin, O. B. Shchekin, and J. Bhardwaj from Lumileds showcase the advantages of on-chip QD LEDs: A commercial lamp at 3000K color temperature and 90 CRI is substituted with QD based LEDs resulting in a system level efficiency gain up to 17%, attributed to the reduced blue LED droop from the lower drive current and the lower heat sink temperature when compared to the standard phosphor based LED lamp output. Read more »
Technologies | Light Conversion | LEDs | Quantum Dots | Aug 23, 2017
1000 Hour Quantum Dot LED Milestone Surpassed by Quantum Materials Corp
1000 Hour Quantum Dot LED Milestone Surpassed by Quantum Materials Corp Leading American Cadmium Free Quantum Dot manufacturer Quantum Materials Corp announced successfully surpassing the 1000 hour continuous on-time durability test for the Company's cadmium-free quantum dots in a remote light emitting diode (LED) application. The testing has been conducted with red and green quantum dots encapsulated in resin and mounted to blue emitting LED's (see diagram below), which are similar to the type of LED's used in standard LCD display back light units (BLU). Read more »
Technologies | Laser Technology | Jun 30, 2017
World’s Brightest Laser Sparks New Behavior in Light
World’s Brightest Laser Sparks New Behavior in Light Physicists from the University of Nebraska-Lincoln are seeing an everyday phenomenon in a new light. y focusing laser light to a brightness 1 billion times greater than the surface of the sun — the brightest light ever produced on Earth — the physicists have observed changes in a vision-enabling interaction between light and matter. Read more »
Technologies | Manufacturing | LEDs | Jun 29, 2017
High Conductive Foils Enabling Large Area Lighting
High Conductive Foils Enabling Large Area Lighting Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP as one of the leading partners for research and development for surface technologies and organic electronics and Sefar AG, a leading manufacturer of precision fabrics from monofilaments, developed a roll-to-roll processed large area flexible OLED during a joint project. Read more »
Resources | LpR Article | Research | LEDs | Manufacturing | Quality | May 16, 2017
Variability in LED Production and the Impact on Performance
Variability in LED Production and the Impact on Performance LEDs are subject to manufacturing deviations, which have an impact on the end product. Benoit Bataillou and T. Merelle, guest authors from Pi Lighting, review the surprisingly large impact on LED performance and light quality. They used traditional as well as modern indicators like CRI and TM-30 as well as the latest circadian indices to measure. The results are explained by spectral modeling and a variability study. They show the large impact on CRI, even with small deviations inside the same bin. Read more »
Resources | LpR Article | Research | LEDs | Electronics | Manufacturing | May 16, 2017
Smart LED System in Package through Wafer Level Integration Approach
Smart LED System in Package through Wafer Level Integration Approach It is believed that LEDs will dominate all lighting applications in the near future. Integration and packaging are the two critical issues that, if resolved, will enable efficient and reliable solutions for lighting requirements. Z. Kolahdouz, H. van Zeijl, and G. Q. Zhang from the Institute of Microsystems and Nanoelectronics (DIMES) at the Delft University of Technology, and M. Kolahdouz from the Thin Film Laboratory and Nano-Electronics at the Department of Electrical and Computer Engineering of the University of Tehran show that wafer level packaging is a promising method to ensure lower cost, higher scale, and superior yield. A new integration approach of a smart unit of LED lighting is introduced: LED System in Package (SiP). Read more »
Resources | LpR Article | Research | Light Conversion | May 16, 2017
New Glass-Based Phosphors for White Light-Emitting Diodes
New Glass-Based Phosphors for White Light-Emitting Diodes Phosphors were always the key component of high quality white LED light. With the increased effîcacy and the higher power capabilities of blue high power LEDs, the phosphors become even more important for reliability, color consistency and overall light quality. Franziska Steudel, Florian Wagner, A. Charlotte Rimbach, Bernd Ahrens, Peter W. Nolte and Stefan Schweizer, scientists at the Fraunhofer Application Center for Inorganic Phosphors, a Branch Lab of Fraunhofer Institute for Microstructure of Materials and Systems IMWS, investigated different glass and ceramics based phosphors for white LEDs. Read more »
Resources | Intellectual Properties | Reports | Light Conversion | Apr 29, 2017
Research and Markets Offers LED Lighting - Key Patent Analysis: Remote Phosphor
LEDs, which are semi-conductor devices that convert electricity into light by the properties of compound semi-conductors, have higher energy efficiency and cost less for replacement due to longer lifetimes than existing lighting systems, and have high resistance to impact or vibration. Furthermore, LEDs have advantages in terms of energy saving and protection of the environment since they do not use toxic substances such as mercury, which give an impetus to their market entry as new lighting systems to replace existing lighting systems. Read more »
Resources | Intellectual Properties | LEDs | Material Science | Apr 29, 2017
Epistar’s Patent Portfolio Reaches New Milestone of 1,000 Granted Patents
As a world-leading company in LED chip technology, Epistar Corporation was granted its 1000th patent recently. This number will continue to grow as there are about another 1,000 applications pending worldwide. Since its establishment in 1996, Epistar has firmly believed that technology innovation is the foundation for being a leader in the industry, and that acquisition and strategic deployment of intellectual property rights, such as patents, is a key to success. Read more »
Resources | Intellectual Properties | Reports | Light Conversion | Apr 29, 2017
Effects of Expiring Phosphors and QD IP on the LED Applications Patent Landscape
Effects of Expiring Phosphors and QD IP on the LED Applications Patent Landscape The latest Yoel report on will especially concentrate on the question how IP forces will evolve, with fundamental patent expiring in the next years? The report provides a detailed picture of the patent landscape for LED downconverters, namely Phosphors & Quantum Dots (QD). It covers patents published worldwide up to September 2015. More than 7,510 patent families relevant to the scope of this report have been selected. Read more »
Resources | Intellectual Properties | Reports | LEDs | Nanowire | Apr 29, 2017
Yole Releases New Nanowire LED IP Study - Startups Compete with Asian LED Giants in the IP Landscape
Yole Releases New Nanowire LED IP Study - Startups Compete with Asian LED Giants in the IP Landscape Asian giants Samsung, Panasonic and LG are the top three patent assignees for Nanowire LED technology. Facing them are several startups including glo, Aledia and Ecospark, which between them have raised more than $150M - thus confirming their serious interest in this field. However, these newcomers face strong technological challenges. Read more »
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