LEDs are Revolutionizing Light – The Past and Future of Lighting
Light is a basic part of life as such and modern living relies on artificial light. Lighting is a constantly developing, even accelerating technology, with LEDs representing the current zenith. On the occasion of the beginning of the IYL 2015, Stephan Wegstein representing VESTEL, a leading contract manufacturer in Turkey, has been asked to explain the challenges this poses and how suitable strategies and technologies can assist in staying on top of developments.
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Tech-Talks BREGENZ - Dr. Jy Bhardwaj, Lumileds, CTO
Dr. Jy Bhardwaj, CTO at Lumileds, held a keynote speech at the 5th LED professional Symposium +Expo (LpS 2015) on September 22nd in Bregenz. He talked about “Trends and Challenges for System Integration” and pointed out further steps and phases of how lighting technologies will evolve. Arno Grabher-Meyer and Siegfried Luger talked with Dr. Bhardwaj about his view on embedded lighting, color LED technologies, substrate and light source technologies.
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Guidance on Specifying Solid State Lighting Luminaires
Certification marks of renowned test institutes are useful tools for end users to easily estimate the quality of a product. They are also a good marketing tool for manufacturers to generate user trust and confidence in a product or the brand. The authors, Jaap Nuesink and Michael Schoof from DEKRA Certification B.V. explain what is needed and which parameters have to be covered in order to be certified, ending up in a guideline of how to qualify for the DEKRA Solid State Lighting Certification Mark.
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Tech-Talks BREGENZ - Andreas Weisl, SSC Europe, Vice-President
Seoul Semiconductor has more than 20 years of experience in semiconductor manufacturing and invests more than 10% of its annual revenue in LED research and development. On average, Seoul Semiconductor applies for more than 600 patents every year. Currently, the company holds more than 10,000 LED patents, including patents in core LED technologies such as Acrich, Acrich MJT, nPola, TV Direct Backlight Technology, UV, and many more. Seoul Semiconductor’s extensive patent portfolio in LED technology includes epitaxial growth, fabrication, packaging, and system application of LED technology. LED professional talked with Andreas Weisl, Vice-President of Seoul Semiconductor Europe GmbH about their business, technologies and solutions.
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Street Lighting Evolution through LED Technology
Standard electronics is usually based on a relatively simple straight-forward technology. Outdoor lighting is more challenging in several aspects, especially robustness. This is also true for the electronics. Sandra Solán, R & D Manager from ELT Electronic Division has studied this technology in depth. To celebrate the IYL 2015 she will explain technical advances, benefits, strengths and technical challenges of current and future street lighting systems for an electronics manufacturer.
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A New Approach to the Design of Driverless AC LED Light Engines
Driverless AC LED light engines have now become a commonplace item of commerce in the lighting industry. Nearly all of them use high voltage integrated circuit switching chips to intelligently change the number of LEDs in a string during a power line cycle so that the voltage of the LED string matches the instantaneous power line voltage. However, customers are demanding higher efficiency, lower cost, and especially a reduction in the flicker content of the emitted light. Peter W. Shackle, president of the consulting company, Photalume, describes some new circuits for AC LED light engines [1] that provide a non-dimming solution with reduced cost, increased efficiency and better light quality as perceived
by the human eye.
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LED Office Lighting for Improved Well-Being and Performance
The influence of artificial light in industry has been a topic of conversation for a while now but opportunities provided by LED lighting have made this subject even more important. Katrin Möller, Junior Researcher at the Competence Center Light, her research partners, Vincent Grote from the Human Research Institut, and Birthe Tralau from Zumtobel Lighting, investigated the effects of LED and fluorescent lamp lighting on human well-being and performance in an office environment, in a comparative laboratory study.
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2015 Year of (LED) Light
The advent of artificial lighting has revolutionized society. 2015, in particular, will go a long way in establishing solid-state light-based technologies as a vital area of innovation for the 21st century.
Dr. Amrita Prasad from LED professional gives an overview of the technical evolution of (LED) lighting and how this may have triggered UNESCO’s decision to make 2015 the Year of Light.
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Direct Current (DC) Supply Grids for LED Lighting
Since many alternative energy sources as well as electronics and controls technologies are based on DC current, DC grids have been investigated more intensely in the last decade. DC grids with a centralized AC/DC conversion have proven to be advantageous in server farms. While LED lighting
is also a DC current related technology, an obvious choice would be to use DC grids for them.
Prof. Eberhard Waffenschmidt from the Cologne University of Applied Science in conjunction with Philips Research presents the results of an office building DC lamp system installation with photovoltaic (PV) support.
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Tech-Talks BREGENZ - Ewing Liu, Everlight, Technical Marketing Manager
LED manufacturers have different strategies and approaches for their product portfolios depending on from which business they are originated. Everlight has a very long experience in optoelectronics as packaging company. Accompanied by Christopher Keusch, Director of Lighting Business EMEA, Ewing Liu, Technical Marketing Manager at Everlight, talks about about the background of the company, the worldwide strategies and upcoming techologies.
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A Self-Compensation Approach for Maintaining the Chromaticity Coordinates of Phosphor Converted LEDs Upon Temperature Variations
Solid-state light sources for general illumination applications are currently becoming more and
more popular. Maintaining chromaticity coordinates over temperature is a challenge. Wolfgang Nemitz, Franz P. Wenzl, Susanne Schweitzer, Christian Sommer, Paul Hartmann from the Institute for Surface Technologies and Photonics at Joanneum Research, and Paul Fulmek and Johann Nicolics from the Institute of Sensor & Actuator Systems of the Vienna University of Technology investigated this issue and propose a promising new solution.
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Tech-Talks BREGENZ - Daniel Doxsee, Nichia Europe, Deputy Managing Director
Nichia is arguably the company with the longest history of manufacturing white LEDs. Recently, however, new competitors especially from China, have started challenging Nichia’s market share. Nichia’s role in strategic and technical solid-state lighting issues and its past, present and future were discussed with Daniel Doxsee, Nichia Chemical Europe’s Deputy Managing Director.
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Tech-Talks BREGENZ - Prof. Mehmet Arik, University of Ozyegin, Turkey
Thermal management is an ongoing challenge and a topic of continued research and innovation. Prof. Mehmet Arik from the University of Ozyegin, Istanbul, also known as the ‘Edison of the 21st Century’, discussed core thermal issues and new innovative solutions, trends in cost reduction, packaging and
how we can learn from electronics to achieve better thermal management of the system as a whole.
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Tech-Talks BREGENZ - Prof. Jiangen Pan, Everfine, Founder & CTO
With ever-increasing demands on measurement equipment, it is becoming essential to meet user needs by providing combined solutions, which address optical, electrical and thermal issues. Prof. Jiangen Pan CEO, Founder and Chief Scientist at Everfine Institute of Optoelectronics, provided valuable insights on new compact solutions for LED measurements, his views and contributions towards global standards and how he works in his “thinking laboratory”.
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Tech-Talks BREGENZ - Dietmar Zembrot, LightingEurope, President
Rapidly growing technologies and emerging market trends in solid-state lighting encourage new innovations largely driven by applications and technological developments. Dietmar Zembrot, President of LightingEurope and Managing Director of TRILUX Group, shared his insights on changing value chains and business models, Europe’s competitiveness and the main driving forces for current SSL technologies.
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Tech-Talks BREGENZ - Walter Werner Werner Mgmt. Services, CEO
The transition from traditional light sources to solid-state light sources has also affected
lighting controls. Nowadays we talk about smart lighting, human centric lighting and
software dominated lighting concepts. Dr. Walter Werner from Werner Management
Services, a highly experienced lighting controls expert, discussed the major trends in
lighting controls with LED professional, as part of the Tech-Talks BREGENZ series.
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Tech-Talks BREGENZ: Martina Paul, General Secretary, CIE (Article published in LpR #43)
With the rise of LEDs as the future lighting technology, the relatively stable lighting industry faces many changes and challenges. One of the main challenges is the ever increasing speed of transitions, something already seen in the semiconductor business. Standardization organizations are facing similar challenges. On the one hand they should define standards that will last as long as possible and on the other hand the standards need to be as clear and precise as possible. Martina Paul, Secretary General of the most important standardization body, the International Commission on Illumination (CIE) was invited to the Tech-Talks BREGENZ to discuss these topics.
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TechTalks BREGENZ - An Initiative for the "International Year of Light and Light Based Technologies 2015"
Luger Research e.U., publisher of LED professional, is starting an exciting activity for the Year of Light 2015 and the Day of Photonics on October 21st 2014: A series of 4-6 top-level meetings per year with the most important and innovative players in the LED/OLED technologies global market place.
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Interview - Optics Production Technology for Customizing LED Luminaires
Siegfried Luger and Arno Grabher-Meyer from LED professional discuss future trends and challenges of the LED lighting business with Richard van de Vrie, CEO of LUXeXceL, a young company that is growing quickly. Van de Vrie owes much of his 25 years of experience in the lighting business to the family owned lighting company that he worked in.
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