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 »
Green Light from 2D Formamidinium Perovskites for Ultra-Fine Display Colors
Chemical engineers from ETH Zurich have succeeded in generating ultra-pure green light for the first time. The new light-emitting diode will pave the way for visibly improved color quality in a new generation of ultra-high definition displays for TVs and smartphones.
Read more »
Yole Développement Releases QD & Wide Color Gamut Display Technologies Report
“As TV makers struggle to trigger replacement cycles, WCG and HDR and their notable picture quality improvements are the next growth drivers for the TV industry,” announces Eric Virey, Senior Market & Technology Analyst, LED, Sapphire & Displays at Yole Développement (Yole).
Read more »
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 »
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 »
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 »
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 »
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 »
White Paper: Extending the Life-Time of LEDs
Choosing the correct protection media for LED devices to improve lifetime and performance.
Read more »
Innovation Extends the Lumen Extraction Limits of RGB and White LEDs in Excess of 53%
EVATEG Energy Efficient Electronics and Lighting Technologies Center recently demonstrated a new optical extraction technology for RGB and phosphor coated LEDs to extend the limits over 53%.
Read more »
Lead Halide Perovskite Nanocrystals - A New Promise for Light Emitting Devices
Perovskites structured materials have attracted scientific and technological interest in the last four years.
Recent studies have shown that these materials could deliver high photoluminescence efficiency at any
desired wavelength in the visible spectrum. Mirko Prato and Francesco Di Stasio, Technologist and
Marie Curie Fellow of the Institute of Photonic Sciences at the Istituto Italiano di Tecnologia focus on the
application in single color LEDs (red, green and blue) and white emitting color-converting layers. They
discuss what limits their application in everyday technology like toxicity and limited functional stability.
Read more »
Industry Breakthrough: Narrow Emission QD's Improve Warm White LED Performance and Improve Color Rendering
In an interview with LED professional at the Lightfair International in Philadelphia, Dr. Jy Bhardwaj, CTO at Lumileds, explained the advantages of the Quantum Dots technology. Lumileds will launch the first QD LED within the next few months.
Read more »
Tech-Talks BREGENZ - Norman Bardsley, President of Bardsley Consulting
Professor of Physics, Dr. J. Norman Bardsley, has become an internationally recognized expert in SSL
through his activities as an advisor for DoE and ISA. Dr. Bardsley has a profoundly deep knowledge and
understanding of OLED technology, which includes the manufacturing thereof, cost structures and
research activities. LED professional talked with him about the different aspects of OLED lighting
technology and asked for his thoughts on future perspectives.
Read more »
New Cree NX Technology Platform Redefines LED Performance for Next Generation Lighting Systems
Cree announces a major LED breakthrough with the revolutionary NX technology platform that will power the next generation of Cree’s lighting-class LEDs. The NX technology platform enables the new Extreme Density (XD) LED family that delivers up to four times higher lumen density than Cree’s previous generation of high power LEDs. This new technology platform makes possible innovative new designs, eliminating current constraints for a wide spectrum of lighting applications such as color-mixing, directional lighting and industrial lighting.
Read more »
From Component to System, Andreas Weisl, CEO at Seoul Semiconductor Europe GmbH
The history of Light-Emitting Diodes
(LED) is quite short compared with
some other electronic device industries.
However, it has changed and
revolutionized the entire world of light
within a very short period of time. The history of Light-Emitting Diodes (LED) is quite short compared with some other electronic device industries. However, it has changed and revolutionized the entire world of light within a very short period of time.
Read more »
