White Papers | Optics + Opt. Materials | Resources | Apr 21, 2017

White Paper: Shaping LED Diffuser Performance with Polycarbonate Materials

White Paper: Shaping LED Diffuser Performance with Polycarbonate Materials The LED lighting market continues to grow, yet consumers are accustomed to the soft white diffused light from incandescent bulbs. To speed up adoption, manufacturers are utilizing plastic materials containing diffusion additives to offset harsh LED illumination and eliminate hot spots. It’s important to choose the correct diffusion plastic to meet to meet transmission, color and UL requirements. In this paper, we examine how plastic selection, a diffusion package and color help designers achieve the desired look for their application. Read more »

Simulation Tools | Engineering | White Papers | Optics + Opt. Materials | Resources | Mar 15, 2017

White Paper: Predicting Scatter of Light Shaping Diffuser® Angles Using Luminit’s Proprietary Optical Model and OpticStudio

White Paper: Predicting Scatter of Light Shaping Diffuser® Angles Using Luminit’s Proprietary Optical Model and OpticStudio Luminit has developed a proprietary scatter model for users of Zemax. Unlike conventional optical design programs that provide bulk scatter and surface scatter models that “predict” output distribution, Luminit’s proprietary optical model accurately calculates surface effects so users can choose the Light Shaping Diffuser (LSD) angle that offers the most optimized performance. This white paper describes the characteristics of the LSD scatter model and the level of accuracy that can be achieved during this critical stage of the design cycle. Read more »

OLEDs | White Papers | Optics + Opt. Materials | Resources

Manufacturability of OLED Encapsulation and Light Extraction

Manufacturability of OLED Encapsulation and Light Extraction Applications for OLEDs in lighting are opening unique possibilities for designers; however, the organic materials make OLEDs more fragile than LEDs. A higher-index Luminit Light Shaping Diffuser® developed into a barrier film could be an excellent substrate for OLEDs, encapsulating them while simultaneously supporting them. Read more »

Simulation Tools | Engineering | White Papers | Optics + Opt. Materials | Resources

WHITE PAPER: "LED Reflector and Lens Simulation using TracePro® Illumination Design and Analysis Software"

Complex reflector with 11 LEDs as modeled in TracePro TracePro® allows users to design, analyze, and optimize LED lighting systems using software simulation prior to building hardware. The resultant accuracy of these models depends on the accuracy of the components that make up the model. These include light source characteristics, surface and material properties, and model geometry. Read more »

Resources | White Papers | Thermal Management

WHITE PAPER: "High Intensity UV LED Sources Enabled by Next Generation Substrates"

SEM images of Nanotherm dielectric compared with anodic layers on Al substrate Thermal management of high-power UV LEDs is substantially more demanding than for white LEDs. This arises due to their lower efficacy combined with the end use requirement for intense light sources. Critical to the thermal management of densely packed LED arrays is the substrate the semiconductors are mounted on. This whitepaper investigates how next generation Nanoceramic substrates can benefit the LED industry and presents a case study of a 75W UV LED module, just 2cm². Read more »

Resources | White Papers | Light Sources | Engineering | Simulation Tools

WHITE PAPER: "Accurate LED Source Modeling Using TracePro"

Ray trace example Modern optical modeling programs allow product design engineers to create, analyze, and optimize LED sources and LED optical systems as a virtual prototype prior to manufacturing the actual product. The precision of these virtual models depends on accurately representing the components that make up the model, including the light source. Read more »

Simulation Tools | Engineering | White Papers | Optics + Opt. Materials | Resources

WHITE PAPER: "Optimization of LED Lens Components using TracePro® Illumination Design and Analysis Software"

Side Emitting lens and reflector combination initial configuration with large angular output and 62% efficiency. TracePro® is award-winning opto-mechanical design software for layout, optimization, & analysis of illumination systems. This white paper illustrates how TracePro’s 2D & 3D optimization utilities are designed to help CAD designers without optical engineering expertise design a variety of LED optical components – including practical examples. The capabilities of TracePro lead the designer through a process to maximize the technical merits of the device/system in the shortest amount of time. Read more »

White Paper | Technology

WHITE PAPER: Intelligent Over Temperature Protection for LED Lighting Applications

Application circuit with the new ILD6070 driver: The current reduction is triggered at a threshold of the solder point temperature of the LED driver IC which is adjustable using an external resistor connected to the Tadj pin LED lighting is becoming increasingly popular. It offers numerous advantages over conventional lighting, but there are still some issues. One is thermal management. Bernd Pflaum and Hakan Yilmazer from Infineon Technologies explain how LED driver ICs with smart over temperature protection help to increase lifetime and optimize system costs of LED lighting systems. Read more »

White Paper | Products, Materials + Tools | Feb 11, 2014

WHITE PAPER: "LED Reflector and Lens Simulation using TracePro® Illumination Design and Analysis Software"

Luxeon LED as modeled as a surface source using the Tracepro Bridge in SolidWorks TracePro® is award-winning opto-mechanical design software for layout, optimization, & analysis of illumination systems. This white paper illustrates how TracePro allows users to begin a project with an initial or basic design for LED lighting systems, use software simulation prior to building hardware, and easily create complex reflector shapes. TracePro’s reflector and lens simulation utilities are specifically designed to help CAD designers without traditional optical engineering expertise design LED optical components quickly. Read more »

White Paper | Technology | Dec 11, 2013

The Right Choice of Current-Limiting Resistors for Constant Voltage LED Drivers

There are different resistor types for LED lighting available (Img: Riedon Inc) While LEDs are mostly driven by current sources, there are also several applications where constant voltage drivers are used. In that case current limiting resistors are mandatory. But that raises the question which resistor is the right one to guarantee reliable and accurate control while not compromising efficiency. Phil Ebbert, VP of Engineering at Riedon Inc. explains what to take care of and how to determine the correct parameters. Read more »

White Paper | Lighting Applications | Dec 06, 2013

LED Lighting Masters the Art of In-Flight Calm on Airbus A380s and Boeing 787s

A380 Airbus Cabin Aboard a state-of-the-art aircraft might be the last place you would think of yourself enjoying a warm “candlelit” dinner, followed by a good night’s sleep under a starry night sky. The truth is, the latest aircraft cabins seek to provide just that – a revolutionary in-flight experience through the use of mood lighting. Mood lighting uses the full spectrum of colors and the ability to change these colors continuously with LEDs to mimic or enhance a sunrise morning or a bright, fresh afternoon or a cool evening that winds down the day. These lighting effects even seek to reduce your likelihood of jetlag. LED lighting programs can be specifically designed to gradually shift your waking and sleeping biorhythms to match that of your destination city. Read more »

White Paper | Technology | Oct 08, 2013

Why Pin Fin LED Coolers Perform Better Under Tilted Position?

For passive cooling, both, simulation and measurement results demonstrate the advanages of a pin fin design over conventional fins when tilted more than 50° For the experiment we compare the ModuLED 9980 with the LPF11180-ZHE. The ModuLED 9980 is a passive LED cooler from extruded aluminium with a diameter. of 99mm and a height of 80 millimeter, thermal resistance under vertical position 1.02°C/W. The LPF11180-ZHE is a passive LED cooler with pin fin structure with a diameter of 111mm and a height of 80mm, thermal resistance under vertical position 1.07°C/W. Read more »

White Paper | Jul 02, 2013

Alternative Calculation Method Will Improve Thermal Analysis of LEDs - by Michiel Krüger, Ph.D. - Philips Lumileds

Figure 1: LED Definition An alternative method to estimate the amount of heat generated by LEDs will help increase the accuracy and streamline the thermal analysis of white LEDs. Up until now, thermal analysis of white LEDs has been an imperfect science. Too often LED lamp and luminaire manufacturers rely on insufficient, inaccurate or intangible data to determine the thermal performance of the LEDs in their applications, and, as a result, may over-engineer their heat sink design. Read more »

Fundings + Projects | White Paper | Feb 27, 2013

NEWLED Research Project Led by the University of Dundee Aims to Revolutionize the Way the World Is Lit

"Bulb is over" was a provoking statement on LpS 2013 - NEWLED could make that reality The way the world is lit up could be revolutionised by a new European-wide research project being lead by the University of Dundee. The 11.8million Euros NEWLED project aims to develop a new generation of white light-emitting LED lights, which would be much more efficient than existing light bulbs. Read more »

White Paper | IP, Reports & Roadmaps | Jan 03, 2013

DoE Releases CALiPER 2012 Year in Review Report

The CALiPER 2012 Year in Review report contains several graphs like this one showing overall test results since 2006 The CALiPER program has tested more than 500 products since its inception in 2006, revealing a variety of performance trends, holding manufacturers accountable for claims, and identifying concerns that limit adoption. Over the past six years, the LED marketplace has changed substantially; previously relegated to niche status, LED products are now a viable alternative in many product categories and market share is expected to grow rapidly. Starting in 2012, Summary Reports focus on a single product type or application. Read more »

FEATURED

WHITE PAPER - Why an EMI Filter in Your Lighting Application is a Must

WHITE PAPER - Why an EMI Filter in Your Lighting Application is a Must From high voltage ballasts for fluorescent bulbs to LED accent lighting, advancements in lighting technologies for industrial and domestic markets have led to a surge in EMI concerns. Luckily, mitigating EMI early on, avoiding costly product redesigns and delays, can be as simple as ... Read more »

FEATURED

Precise Measurement of UV Light Sources for Disinfection

Precise Measurement of UV Light Sources for Disinfection UV radiation encompasses a very wide wavelength spectrum between 10 and 400 nm and is subdivided in ISO Standard 21348 into three ranges. The UVC range between 100 and 280nm is currently extremely relevant for air and water disinfection for combating COVID-19. Since the outbreak of the pandemic ... Read more »

EDITORIAL

Signify: New EU Ecodesign and Energy Labeling Regulations Are Met

Signify: New EU Ecodesign and Energy Labeling Regulations Are Met Signify (Euronext: LIGHT), confirms that its leading lighting portfolio will meet the new EU Ecodesign and Energy labeling regulations, which will affect all lighting products in the EU Member States from September 2021 onwards. The new regulations are representative of the enormous transition that ... Read more »

EDITORIAL

New DLC Report: Interoperability for Networked Lighting Controls

New DLC Report: Interoperability for Networked Lighting Controls Interoperability for Networked Lighting Controls explores the current interest in networked lighting controls (NLC) and the benefits various stakeholders can attain from championing interoperable systems. The report details three specific and actionable use cases and explains why interoperability ... Read more »

EDITORIAL

Tech-Talks BREGENZ - Prof. Ruairí O'Brien, Founder of Ruairí O'Brien Lighting Design

Tech-Talks BREGENZ - Prof. Ruairí O'Brien, Founder of Ruairí O'Brien Lighting Design Ruairí O'Brien, associate professor and head of the Architecture and Visual design department at the German University in Cairo and CEO of Ruairí O'Brien. Architektur. Licht Raumkunst, surprised and delighted the audience with his lecture at LpS 2016 when he talked about allowing darkness. He ... Read more »