LED professional Review (LpR) - Articles

Research | LpR Article

LED Office Lighting for Improved Well-Being and Performance

Study design 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. Read more »

Leading Article | LpR Article

2015 Year of (LED) Light

While industry has largely concentrated on developing retrofit LED lamps that integrate into existing infrastructure, new applications are emerging that allow engineers, designers and industry to explore the potential of SSL technologies 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. Read more »

Research | LpR Article

Direct Current (DC) Supply Grids for LED Lighting

Typical AC lamp driver 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. Read more »

Research | LpR Article

A Self-Compensation Approach for Maintaining the Chromaticity Coordinates of Phosphor Converted LEDs Upon Temperature Variations

Line scans for the temperature profiles along the vertical direction of the LED package 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. Read more »

Resources | LpR Article | Tech-Talks Bregenz | Measurement | Jan 09, 2015

Tech-Talks BREGENZ - Prof. Jiangen Pan, Everfine, Founder & CTO

Prof. Jiangen Pan 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”. Read more »

Resources | LpR Article | Tech-Talks Bregenz | Market | SSL

Tech-Talks BREGENZ - Dietmar Zembrot, LightingEurope, President

Dietmar Zembrot 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. Read more »

Smart Lighting + IoT | Resources | Tech-Talks Bregenz | Controls | LpR Article | Sep 12, 2014

Tech-Talks BREGENZ - Walter Werner Werner Mgmt. Services, CEO

Walter Werner 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. Read more »

Technology | LpR Article | Apr 05, 2013

Interview - Optics Production Technology for Customizing LED Luminaires

Printed Optics 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. Read more »

FEATURED

LumiTop 4000: Comprehensive Optical Wafer Testing for μLEDs

LumiTop 4000: Comprehensive Optical Wafer Testing for μLEDs Instrument Systems offers a unique camera-based measurement solution for μLED wafer testing that generates 2-dimensional, pixel-resolved optical analyses within given cycle times. The LumiTop 4000 has a resolution of 12 MP and can detect the smallest of defects and inhomogeneities on the wafer. ... Read more »

FEATURED

Lumileds Maximizes Field Usable Lumens: New LUXEON HL2X LED

Lumileds Maximizes Field Usable Lumens: New LUXEON HL2X LED Lumileds introduces the LUXEON HL2X, the ideal choice for roadway lighting and sports lighting fixtures with the highest flux and efficiency in an industry standard package. "With 318+ lumens at 700 mA and 85°C, LUXEON HL2X delivers more 'field usable lumens' for optical engineers to work with. ... Read more »

EDITORIAL

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" ... Read more »

EDITORIAL

Signify Invests to Broaden Its UV-C Lighting Portfolio for Professional Disinfection

Signify Invests to Broaden Its UV-C Lighting Portfolio for Professional Disinfection Signify, the world leader in lighting, is increasing its UV-C lighting production capacity and expanding its UV-C product portfolio. The company is leveraging more than 35 years of expertise in UV-C lighting to address the growing global need for the disinfection of air, surfaces and objects. Read more »