SSL a  designer perspective

With the increasing stress on the green agenda and the recent dismissal of familiar tungsten light sources, a serious challenge is landing on the lighting designer table. How to create the same emotions, the same experience we have been accustomed to, the same level of functionality, using the new solid state light sources? Is this possible? What are the key issues and the key opportunities?

The talk focuses on a personal interpretation of what lighting design is, from small sized projects to the larger urban scale masterplans. Light is discussed in its essential qualities,  without any technological preconceptions and strongly focusing on the user experience.

ENERGY STAR: Advancing Adoption of Solid State Lighting Products in North America

ENERGY STAR is a program of the U.S. Environmental Protection Agency helping consumers and businesses save energy, save money, and protect the environment through energy efficient products and practices.

The Program labels more than 60 product categories, including solid state luminaires and lamps, home appliances and electronics, and computers and networking equipment, for which electric utilities provide financial incentives.  Americans, with the help of ENERGY STAR, prevented 170 million metric tons of greenhouse gas emissions last year alone –– equivalent to the annual emissions from 33 million vehicles — and saved nearly $18 billion U.S. on their utility bills.

This session will provide an overview of the program, as well as information for manufacturers wishing to partner with the program who currently sell or are planning to sell LED products into North America.

Challenges and opportunities for Airline operators by replacing conventional Lights with LEDs

As the only Aircraft lighting supplier providing the entire lighting suite, inside and outside, tip to tail basically for all major civil and military OEMs, completion centres and operators, we would like to take this opportunity to share our insight in this market. We believe that we can share some guidance that is beneficial to the operators as well as to our lighting colleagues in adjacent businesses. There has been plenty of overpromising and under-delivering even in such conservative markets as the aviation industry.  Why haven’t most past LED upgrades not lived up to the advertised benefits.

What are the latest trends for Exterior, Interior, Emergency, Cockpit and Cargo Lights?  What will be available from the OEMs in the next years, what will be available as aftermarket upgrades? What performance can be expected and what return of investments are realistic?

Goodrich recommendations for how to start, what pitfalls to avoid and what is essential to make LED conversions an all around success.

The European Commission Activities and Programmes to Promote Solid State Lighting

EU energy efficiency policies which affect the penetration of LED lighting such as the Ecodesign implementing Regulations for lighting procucts and other policy papers that encourage the diffusion of Solid State lighting.

The European Commission JRC is also carrying out a in deepth study on the current status of the industry, the market and the projects on solid state lighting in the EU. the key results of the study will be presented

I will present the current market trends for LED lighting, the current EU strategy to promote LED lighting including public procuremnt rules and R&D support. A sample of innovative LED lighting projects both for outdoor and indoor will also be presented.

Automotive applications of LED – Attractiveness, achievements and challenges

LEDs were first deployed for automotive signaling applications several years ago and today they are widely used in that field. Recent advances of white, high power LEDs are now about to open a range of lighting applications for that technology. This trend induces deep and significant changes in that field.

Indeed LEDs bring in several benefits to lighting, such as a high color temperature close to that of daylight; a very good efficiency that will contribute towards cutting CO₂ emissions; a highly flexible optical design and thus differentiating styling potential; and ultimately a reduction of mass and size.

Nevertheless the technology of white LEDs is undergoing fast changes, at a pace that differs significantly from the long cycles of the automotive industry. This is not without problems, first among which the lack of standardization of LED lighting modules. Issues related to lifetime and obsolescence of technologies require the adaptation of design rules and methods as well as of the management of life cycle. Such an evolution will have to be backed by suppliers of sources in order to allow this promising technology to win a large share of the automotive lighting market.

What you simulate is what you see : Taking into account physics for improved lighting system design

This presentation will introduce and discuss the advantages of taking actual physical properties – of surfaces, of materials, of LEDs-  into account during the lighting system design process. Particularly relevant when rendering a lighting system ‘in-situ’ in various lighting environments, the physics based approach will be compared and contrasted with the traditional, non physics-based approach to rendering.

Learn how accurate, scientific , physics based simulation is achievable in just a few clicks- and how it can save you multiple prototypes!

The Third Cycle: Quantifying the Lighting Market and its Impact on  LEDs.

The LED industry experienced tremendous growth during the past decade largely due to rapid adoption in the mobile handset market. Many of the same early dynamics witnessed in the First Cycle are materializing in the LED industry once again today driven by LCD backlighting, which we have called the Second Cycle.

As this cycle is beginning to peak, investors are now looking towards the LED industry’s “holy grail:” lighting. While the market is still nascent, we predict LEDs will make significant inroads into the massive lighting market over the next decade.

This presentation will explore the total size of this opportunity and the profound implications it will have on the entire LED and traditional lighting supply chains, as well as the unexpected consequences of yield improvements and efficiency gains, drawing from lessons learned through years of following other maturing technology sectors.

City of Los Angeles: changing our Glow for Efficiency

The City of Los Angeles presentation will focus on the City’s Bureau of Street Lighting operations, span of responsibilities including design, construction, maintenance and repair activities.

The presentation will include information about City’s LED Street Lighting Energy Efficiency Initiative, Program goals, objectives, benefits and lessons learned.

Quality control of SSL products: results of the  Annex from the  International Energy Agency.

The extreme variability of performance of Solid State Lighting products may jeopardize hopes by governments that their deployment will lead to significant energy savings in electricity.  Confidence of customers in SSL has to develop, based on the organization of this industry, and the elimination from the market of products of low quality and low performance.

Governments tend to approach this issue with two tools : regulation (mandatory) and labels (voluntary). The SSL annex 2010-2014 was launched by 7 countries participating  to the 4E Implementing Agreement of the International Energy Agency. Common criteria for quality assurance have been developed, and proposals for  improvement of testing procedures are presented.

LED market and the role of standardization in market transformation

In India, the market for LED is dominated by grey market Govt. of India felt that there was a need to standardise the lED in the procurement process which will create a market for good LED product.

Bureau of Energy Efficiency (BEE) and Bureau of Indian Standards (BIS) have thus created a platform where stakeholders including the manufacturers LED suppliers and other market leaders have contributed to the formation of the first LED standard across the globe.

These standards have drafted using International benchmark and for LEDs component and accessories. The paper explain the market import and standardisation of LED and their role in the market for transformation.

Technology Challenges and Prospects for High Efficiency OLED Lighting

OLED technology has the potential to change the landscape for general illumination lighting, provided a number of technical and market barriers can be overcome. From the perspective of the US Department of Energy (DOE), energy efficiency is the most important potential benefit of OLED-based solid state lighting.

As researchers at a DOE national laboratory, our team at Pacific Northwest National Laboratory (PNNL) is therefore focused on the development of technology to ensure OLED lighting will meet energy efficiency goals upon deployment. Our efforts have focused on the development of energy efficient materials and technology components to ensure future lighting consumes less power than existing technology.

In this presentation, I will provide one view on the barriers to development and adoption of energy efficient OLED materials and materials systems, and to prospects for overcoming these barriers. I will also provide a summary of PNNL’s efforts to address critical technical challenges facing OLED lighting.

NanoLEDs, a new breakthrough for the LED industry

With world electricity consumption close to 20% for general lighting, the set up of high efficiency sources is a one of the answer to the greenhouse effect problem. However, still a dramatic improvement is needed for LED to reach a high level of performance and cost reduction to facilitate the generalization of LED as light sources.

In response to these limitations, HelioDEL, a start-up from CEA-Leti, is making use of nanowire-based LED (NW-LED).

During this presentation, we will show how nanowire structure overcomes all of the limitations of conventional performance and manufacturing associated with LED such as the decrease of the brightness concurrently with high thermal extraction efficacy using large electrical and thermal conductor namely 8 inches silicon substrates or to address native white LED

By the end, HelioDEL will present its vision concerning new chip generations for different applications.

Apples & Pears – why standardisation of performance requirements is important ?

The lighting industry is driving the process for standardisation of performance requirements for LED products. This is an important first step towards like-for-like comparison of LED luminaire manufacturer claims. Recently two important IEC documents have been published:

- IEC/PAS 62717 Performance requirements for LED modules

- IEC/PAS 62722 Performance requirements for LED luminaires

The question that now remains is how users (specifiers, lighting designers, technical engineers and policy makers) of LED luminaires can evaluate performance claims in an accurate way while preparing lighting projects. They need to understand that they currently – often without knowing – compare apples & pears.

In both IEC/PAS documents luminaire manufacturers and certification bodies will find the definitions of a set of initial performance criteria plus a description on how to measure these. It is up to the manufacturers of LED modules and LED luminaires to make sure that their product specifications are measured in compliance with the IEC/PAS documents.

For that purpose CELMA (the European trade association for luminaire manufacturers) prepared this lecture to give guidance to users of LED luminaires. The performance requirements used in the IEC/PAS documents have been translated into understandable quality criteria. Applying these quality criteria in a proper way will enable users to compare performance claims of different manufacturers and walk away from apples & pears.

The standards and technical specifications of Chinese LED lighting

Introduce the framework and development of Chinese LED lighting standards , as well as the technical specifications and implementation of the LED lighting products.

Progress in the Growth, Characterization and Device Performance for Nonpolar and Semipolar GaN-based Materials

Devices grown on c-plane GaN suffer from large internal electric fields due to discontinuities in spontaneous and piezoelectric polarization effects which cause charge separation between holes and electrons in quantum wells and limits the radiative recombination efficiency.

Nonpolar GaN devices, such as in the m-plane , are free from polarization related electric fields since the polar c-axis is parallel to any heterointerfaces.  Semipolar GaN-based devices have reduced electric fields and in some cases, such as , show a high propensity for Indium update for InGaN quantum wells.

In this talk, we present work on outstanding materials issues including:  morphological stability with special emphasis on the role of substrate orientation and growth conditions; new evidence for dislocation-related strain relaxation in semipolar GaN-based heterostructures; unambiguous determination of the polarization cross-over in semipolar InGaN/GaN heterostructures; new detailed atom probe analysis of high performance GaN-based LEDs and laser diodes.

Additionally, we update progress on nonpolar electron devices and nonpolar and semipolar LEDs and LDs including the achievement of high performance true blue (λ >450 nm) and true green (λ >520 nm) lasers on m-plane and semipolar (namely, ) GaN substrates.

Ergonomic and efficient reflectors with high power LED arrays

Luminaires with an LED-array as light source aiming for long term success in a professional environment have to meet the already established general quality criteria for lighting. In this context the reduction of glare is one important fact for an ergonomic solution. Individual lenses for each LED serve today as the optical system within a large number of currently commercially available LED-luminaires. Enhanced LED efficiency furthermore increases the glare-problem of such systems approaches.

The present article deals with different reflector designs principles, based on an innovative primary- / secondary approach, which is able to handle the increasing glare problem caused by the usage of LED-arrays as light source. Simultaneously these reflector designs meet the demands going along with the ZAHGA-Initiative. In case of an LED-array-replacement the reflector remains in the luminaire. A first prototype proves the necessary efficiency, because for a narrow beam downlight (half-value angle 15o) a high fixture efficiency of more than 90% could be achieved. Further identified optimization-potential seems to allow a reachable efficiency of 95%.

High quality of light: Color Rendering Index

The Color Rendering Index (CRI) indicates how much a light resembles a natural light source with the influence of the light on various colors of objects. The higher the CRI the more similar are the colors in comparison with an ideal or natural light source. This is important in color-critical applications such as Retail (e.g. hat and coat stands) or Industry (e.g. chilled distribution depots) where the color perception is important.

Incandescent bulbs and halogen lamps have dominated the interior and display lighting market segments because of their high CRI (100). But because of their low luminous efficacy (10~15 lm/W) government authorities worldwide have passed legislation, which will go or have gone into effect over the past few years, banning the sale of these products. Currently, white LED’s are divided into two major markets: products with a High CRI greater than 85, which is close to natural light, and products with a Normal CRI of 70 to 80. High CRI products will often be less bright than their lower CRI counterparts, but due to their similarity to natural light High CRI sources are excellent for high quality light applications.

LED’s with normal CRI focus more on brightness than on color and have the disadvantage of being different from natural light. Thanks to improved phosphor processes bright LEDs with some of the highest CRI are available today. High CRI Top View LED has a CRI of 90, equivalent that of natural sunlight, and 0.2 W of power consumption with 100 lm/W of luminous efficacy and high reliability of over 50,000-hour-lifespan.

With a high CRI, superior lumens per watt and long life, LEDs are poised to dominate the lighting market segments where high-performance light sources are a must.

American LED Experience:  What are we learning from users

The U.S. Department of Energy operates a comprehensive SSL program, with major program elements focused on SSL technology R&D, SSL manufacturing technology R&D, and SSL commercialization.  As part of the commercialization effort, DOE works with a wide range of product users, both government and private, to assist with SSL projects.

From this, DOE learns valuable information about SSL user experiences, as well as user lighting needs and expectations.  This information has been used to help shape the DOE program.

This presentation will address some of what DOE has learned, with an emphasis on information learned from SSL demonstration projects, but will also include information learned from users in various projects, including buyer consortia DOE established to help support commercial adoption of energy-efficient technologies.  The presentation will address economics, light quality, product quality, installation, and operation and maintenance.

Leipzig – Intelligent lighting with LED

With its entry of “Intelligent Urban Light” the City of Leipzig was awarded in 2009 with the 3rd prize in a nationwide competition for energy efficient urban lighting.  The main focus of the concept was the urban lighting of the entire city centre and the chance to reduce energy consumption by 50%.

The concept is divided in two parts:  Part one is introducing a new generation of metal halide light sources of the inner ring road around the city centre with its 4-8 lanes and connecting it to an adaptive lighting control system. Part two is a substitution the metal halide lamps of 90 Watt in the historic gas luminaries by LEDs of 24 Watt.

In total there will be an exchange of about 500 light points which reduces the energy consumption from 473.000 kWh/a down to 235.400 kWh/a (equals 50% reduction). About 162 t/a of CO2 will be saved. The pilot project “Intelligent Urban Lighting” will be fully implemented in 2011 / 12 and is subsidized by 40% by the Federal Ministry of Environment Protection. A return of investment is reached in 7 years.

OLED Lighting – process technologies for large, transparent and  devices

Beside conventional inorganic LEDs, OLEDs are considered as the second solid-state-lighting technology for new flat, large-area, and efficient lighting solutions. OLED lighting on glass substrates has been successfully started the market entry.

The production of highly efficient OLED on larger area is still a challenge. A new deposition system was installed at COMEDD. Results of the new Gen2 manufacturing system for lighting and signage applications based on organic light emitting diodes (OLED) will be presented.

A novel approach has been started to develop high efficient small molecule OLED stack deposition on flexible webs in a roll-to-roll vacuum process. Low cost metal foil as substrate for the OLED will allow a major cost reducing step, will open up new degrees of freedom in design leading and will be competitive for general signage and lighting applications.

Metal foils as substrate for the deposition of organic light-emitting diodes in combination with the p-i-n OLED technology will allow a direct OLED deposition on metal foils. Within the “Center of Organic Materials and Electronic Devices Dresden” (COMEDD) of Fraunhofer IPMS a roll-to-roll vacuum coater for research and development in OLED lighting is currently going into process. A roll-to-roll line concept for research and development for OLED lighting will be briefly introduced.

Advances in OLEDs: from illumination to bio-sensors

This talk presents a survey of the Organic Light Emitting Diodes (OLEDs) evolution towards the general lighting market. OLEDs have been indicated as the future source for lighting applications, due to the very high efficiency, long life time, flexibility.

Their intrinsic characteristics, like the uniform large surface emission, the broad spectral emission in white (essential for a good color rendering) and the possibility to emit light at any desired color, make them attractive not only as new light sources, allowing significant energy savings, but also as new architectural elements.

Moreover, OLEDs are “green” light sources ideal to replace the inefficient incandescent bulbs as well as the fluorescent tubes, containing chemicals dangerous for the environment.

However there are still some technological and economical issues that limit OLEDs spread out in the general lighting market. An analysis of these issues is here presented along with the envisaged ways to solve them.

Finally a brief presentation of a new application of these innovative light sources in the field of miniaturized and disposable bio and chemical sensors will also introduced.

LED: Myth and Reality

Overview of LED business worldwide by application
Critical Success factors for LED chip producers
Business Model of BLU (Backlighting ) market
Domestic LED  lighting in Japan (No1 worldwide) à Why successful ?
Professional LED lighting in Japan à trends & volume
Risk screening of Led technologies
Reconfiguring the Lighting “ Value Chain”
New era , new business model
The future of Led lighting

III-V and III-N nanowires for realization of efficient LEDs on silicon

Semiconductor nanowires nucleate epitaxially on a single-crystalline wafer and grow via a mechanism of guided self-assembly. Due to the small foot-print of the nucleation, and the narrow diameter, a great freedom in combination of different materials, having different lattice parameters, is obtained. This includes growth of different compound semiconductor nanowires on silicon substrates, yielding dislocation-free materials of III-V and III-N materials grown on silicon wafers.

We have for more than ten years been pioneering this technology, and we have today III-V and III-N growth and processing technologies that enable formation of ideal axial as well as radial heterostructures, operating as efficient LEDs.

I will describe the materials science underlying the technology and will give examples of the state-of-the-art in nanowire based LEDs operating in the entire spectral region, from deep blue to communication wave-lengths in the near-IR.

OLED: From Display to Lighting – From simple to complex business

The OLED displays have started to invade the mobile applications thanks to Samsung and now LGDisplay. OLED TV’s are in coming sight. OLED display business equation is relatively clear: a few suppliers coming with their LCD know-how on TFT backplane, display devices easy to perceive and to identify, applications clearly understood (mobile, portable, TV) with a limited number of set makers.

OLED presents a very different aspect in the lighting fields. The lighting industry is managed via a complex value chain from the light source towards the final product application where design and decision chain play a crucial role. OLED is adding a severe complexity while crossing the boarders between light source and design of the luminaires.

A new value chain will emerge with new players when the current players will have to rethink their business model. The OLED lighting industry remains to be invented.

Advances and Challenges of High-Brightness LED Technology

With solid state lighting exceeding the efficiency level of flourescent lamps, LED research now focuses on further improvements in brightness, additional functionality and designs with lower manufacturing cost. The current state of the art chip and LED component technology will be described along with a review of upcoming concepts and ideas to enhance internal and external quantum efficiency.

Much More than Energy Saving – A Global Industry Perspective on LED Lighting

The lighting industry on a global scale is confronted by a paradigm shift as the trend is shifting to LED lighting. Initially seen as a technologically disruptive development, the development towards LED is raising opportunities and challenges in a multi-dimensional way.

Energy performance of lighting is, albeit a crucial part, only one dimension that is impacted by LED technology. Besides that LED will lead to a completely new perception of techno-aesthetics for the built environment and will open the way to a completely new definition of light. The global lighting industry is at a cross road and is in the process of addressing these challenges holistically and based on inter-regional learning and exchange. T

he intervention will highlight concrete examples of cross-learning and will also address  the opportunities that arise from correlating with new stakeholders in order to enable Led lighting to be developed to its full environmental, artistic, qualitative and holistic potential.

Planning the light by contrasts

Everyday light comes out from an important analysis of places and environmental conditions. No one place could give up this language.

The choice of LED technology has to be seen not just as technical element, but as one of the most interesting and new way of reshaping and renew urban spaces.

The methodology is based on the understanding that high levels of illuminance are not necessary in order of a good perception of the environment. More important is the control of luminance gradients between “object” and background.

It is obvious that it is impossible to give fixed technical solutions and fixed data. Values for the object will be different, depending essentially on the background values.

To get the best results in terms of contrast, the lighting solutions must be defined as the “brightness” of the place, “quantifying” light in relation of the spectral sensitivity of human eye and the ratio between object’s luminance and background luminance.