Technology News

Resources | LpR Article | Technologies | LED Drivers | Jan 13, 2021

How to Increase the Efficiency of Two-Stage Drivers

How to Increase the Efficiency of Two-Stage Drivers In this article, Dr. Weirich from Infineon Technologies, describes a simple method for increasing the efficiency of drivers that can operate with LED engines with a wide range of current and power levels, at virtually no effort. In addition, the method allows for using smaller inductors in the buck stage, leading to lower cost and potentially, smaller size. Read more »

Research News | Technologies | microLEDs | Nanowire | Nanowire-LEDs | Dec 16, 2020

Aledia Has Produced Its First Nanowire Chips on 300mm Silicon Wafers Using CEA-Leti Pilot Lines

Aledia Has Produced Its First Nanowire Chips on 300mm Silicon Wafers Using CEA-Leti Pilot Lines Aledia, a French startup pioneering a disruptive technology for microLED displays, today announced it has manufactured the world's first microLED chips produced on 300 mm (12") silicon wafers. The company, which developed its breakthrough technology on 200 mm (8") silicon wafers over the past eight years, will produce the chips on both 200 mm and 300 mm wafers. The larger wafers provide better economic payoff and cost-effective integration with smaller-node electronics, which are only available on 300 mm silicon wafers. Aledia was spun out of CEA-Leti, a French research institute pioneering micro- and nanotechnologies, in 2012, and the work on 300 mm wafers has been performed by joint Aledia and CEA-Leti teams. Read more »

Resources | HCL-Research | Full Spectrum LEDs | Jürgen Honold | Nov 30, 2020

Tech-Talks BREGENZ with Jürgen HONOLD, Dipl.Des.(FH)

Tech-Talks BREGENZ with Jürgen HONOLD, Dipl.Des.(FH) At LpS 2019, Jürgen Honold, Dipl.Des.(FH), and his co-presenter Dr. Martijn Dekker, held a very interesting and remarkable lecture about photobio-modulation (PBM). LED professional wanted to learn more and asked Jürgen Honold for an interview. As Technical Fellow, he is responsible for Seaboroughs' advanced lighting research and development and exactly the right person to talk with when it comes to HCL and related technologies and applications. Dr. Martijn Dekker, CEO of Seaborough accompanied him and gave an introduction with additional insights into Seaborough and the company's structure and strategy Read more »

Research News | Environment | Health + Environment | Oct 30, 2020

Research Shows that Streetlights Contribute Less to Nighttime Light Emissions in Cities than Expected

Research Shows that Streetlights Contribute Less to Nighttime Light Emissions in Cities than Expected When satellites take pictures of Earth at night, how much of the light that they see comes from streetlights? A team of scientists from Germany, the USA, and Ireland have answered this question for the first time using the example of the U.S. city of Tucson, thanks to "smart city" lighting technology that allows cities to dim their lights. The result: only around 20 percent of the light in the satellite images of Tucson comes from streetlights. The study is published today in the journal "Lighting Research & Technology". Read more »

Research News | HCL-Research | Special Applications | Medical | Health | Oct 23, 2020

LED Technology Shines the Light on Ovarian Cancer Treatment

LED Technology Shines the Light on Ovarian Cancer Treatment Scientists estimate that nearly 60% of all cancer patients do not respond effectively to chemotherapy treatments. Even worse – many of those same patients experience toxic and sometimes deadly side effects. Now, a Purdue University scientist and entrepreneur is working to use simple LED light to help determine if certain chemotherapy options will work for specific patients. Read more »

Research News | HCL-Research | Office Lighting | Oct 23, 2020

Research Project Combines Dynamic Daylight and Artificial Light for a New Quality of Light for Work Environments

Research Project Combines Dynamic Daylight and Artificial Light for a New Quality of Light for Work Environments A new approach to lighting design and technology is the focus of the Double Dynamic Lighting project conducted by the renowned Aalborg University in Copenhagen, supported and accompanied by several leading lighting companies. The research team led by Prof. Ellen Kathrine Hansen is exploring the combination of dynamic daylight and artificial light in a spatial context and opening up a new dimension for architects and lighting experts in supporting individual needs and different working requirements. Read more »

Resources | LpR Article | Technologies | HCL-Research | Health + Wellbeing | Light Generation | Oct 16, 2020

Adopting an LED More Suited to Circadian Entrainment

Adopting an LED More Suited to Circadian Entrainment Since the introduction of LED lights, a lot has been said about risks of blue light for ocular health on the one hand, and the opportunity of circadian entrainment, on the other hand. While a controversial discussion on the first topic is ongoing, the second topic is well accepted. To solve both issues, Bill Chan, President of LiteController Inc. proposes the application of 465-470nm pumped phosphor converted white LEDs with a content of 86% - 92% blue-turquoise light and 8% - 14% blue-violet light. In the article he concentrates on the second topic and proves the benefit of regulating the circadian entrainment more efficiently, maintaining a high typical efficacy of 150 lm/W and good color rendering of CRI 80+ ideally supporting the WELL Building Standard. Read more »

Research News | OLEDs | PLEDs | Sep 28, 2020

EurekAlert - Annunces: Impurities Enhance Polymer LED Efficiencies

EurekAlert - Annunces: Impurities Enhance Polymer LED Efficiencies New research published in EPJ B reveals that the higher-than-expected efficiency of PLEDs can be reached through interactions between triplet excitons, and impurities embedded in their polymer layers. Molecular dynamics simulations have shown that the mysteriously high efficiency of polymer LEDs arises from interactions between triplet excitons in their polymer chains, and unpaired electrons in their molecular impurities. Read more »

Resources | LpR Article | Applications | Technologies | Controls | Smart Lighting + IoT | Sep 01, 2020

Offline Lighting Voice Controller — An Alternative to Voice Assistants

Offline Lighting Voice Controller — An Alternative to Voice Assistants The historical evolution of light control by users started with a mechanical switch followed by potentiometer and dimming, touch panels and touch screens, gesture and movement detection control, and ending with voice. Voice control are mostly online speaker independent like Alexa, Google Home and Siri. But there are privacy and security concerns. Filip Michalski, Electronic Engineer, and Cezary Skotak, CEO, from Cezos describe a speaker independent offline voice controls system, explain the technology and discuss the pros and cons. Read more »

Research News | Partnerships | Micro-LEDs | Light Generation | Special Applications | Displays | Jul 22, 2020

ALLOS and KAUST Are Working on High Efficiency Nitride-Based Red LEDs on Si

ALLOS and KAUST Are Working on High Efficiency Nitride-Based Red LEDs on Si ALLOS Semiconductors has engaged in a collaboration with Prof. Ohkawa and his team at King Abdullah University of Science and Technology (KAUST) for realizing high efficiency nitride-based red LEDs on large diameter silicon substrates. In the collaboration the teams are addressing fundamental issues like the large lattice mismatch and the quantum-confined Stark effect (QCSE) which are preventing the adoption of red nitride-based LEDs for practical industry usage. In particular, for the emerging field of micro LED displays there is a strong demand to enable red LEDs on large diameter wafers in addition to the established blue and green color LEDs in the nitride system in order to reduce manufacturing complexity and cost. Read more »

Research News | IR | Health + Wellbeing | Jun 29, 2020

Australian Associated Press Recently Wrote: Red Light Could Improve Over-40s' Eyesight

Australian Associated Press Recently Wrote: Red Light Could Improve Over-40s' Eyesight A small LED torch that emits deep red light could help improve declining eyesight, scientists have said: A study by University College London, involving a small sample size of 24 people, has shown that staring at long wavelength light for three minutes every day can "significantly improve vision" in those aged 40 and above. Read more »

Smart Lighting + IoT | Technologies | Research News | Controls | Touchscreen | Jun 29, 2020

Touchscreens Are Going 3D with University of Bristol's Innovative New Spray-On Technique

Touchscreens Are Going 3D with University of Bristol's Innovative New Spray-On Technique Inspired by the way an artist creates graffiti on a wall and using a novel combination of sprayable electronics and 3D printing, the technique, called ProtoSpray, allows the creation of displays on surfaces that go beyond the usual rectangular and 2D shapes. Read more »

Research News | LEDs | Perovskite | Inkjet-Printing | Light Generation | Jun 15, 2020

Printed Perovskite LEDs – An Innovative Technique Towards a New Standard Process of Electronics Manufacturing

Printed Perovskite LEDs – An Innovative Technique Towards a New Standard Process of Electronics Manufacturing A team of researchers from the Helmholtz-Zentrum Berlin (HZB) and Humboldt-Universität zu Berlin has succeeded for the first time in producing light-emitting diodes (LEDs) from a hybrid perovskite semiconductor material using inkjet printing. This opens the door to broad application of these materials in manufacturing many different kinds of electronic components. The scientists achieved the breakthrough with the help of a trick: "inoculating" (or seeding) the surface with specific crystals. Read more »

Research News | Technologies | LiFi | Jun 15, 2020

CEA-Leti Researchers Break Throughput Record for LiFi Communications Using Single GaN Blue Micro-Light-Emitting Diode

CEA-Leti Researchers Break Throughput Record for LiFi Communications Using Single GaN Blue Micro-Light-Emitting Diode CEA-Leti today announced its researchers have broken the throughput world record of 5.1 Gbps in visible light communications (VLC) using a single GaN blue micro- light-emitting diode (LED). Their data transmission rate of 7.7 Gbps achieved with a 10 µm microLED marks another step toward commercialization and widespread use of LiFi communication. Read more »

Research News | SSL | LEDs | Light Generation | Light Extraction | Jun 10, 2020

Pushing Photons - Metasurface Design Methods Can Make LED Light Act More Like Lasers

Pushing Photons - Metasurface Design Methods Can Make LED Light Act More Like Lasers UC Santa Barbara researchers continue to push the boundaries of LED design a little further with a new method that could pave the way toward more efficient and versatile LED display and lighting technology: In a paper published in Nature Photonics, UCSB electrical and computer engineering professor Jonathan Schuller and collaborators describe this new approach, which could allow a wide variety of LED devices — from virtual reality headsets to automotive lighting — to become more sophisticated and sleeker at the same time. Read more »

FEATURED

Provide UVC Disinfection Total Solution for You - Edison Opto

Provide UVC Disinfection Total Solution for You - Edison Opto In recent years, due to the global outbreak of COVID-19, the people's demand for anti-epidemic and sterilization of anti-virus products has risen, ranging from portable sterilization equipment, home appliances sterilization, and public health sterilization. With the rise of environmental awareness ... Read more »

EDITORIAL

Zhaga and the DALI Alliance Add Sensors and Controllers to Zhaga-D4i Certification

Zhaga and the DALI Alliance Add Sensors and Controllers to Zhaga-D4i Certification The joint Zhaga-D4i certification program from the DALI Alliance and the Zhaga Consortium has already qualified a number of Zhaga-D4i Book 18 outdoor luminaires with Zhaga receptacles and D4i components. Now, certified D4i control devices with Zhaga connectors can also be submitted for Zhaga-D4i ... Read more »