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Editorial Preview: LpR 79 | MAY/JUN 2020
Planned Topic* Title / Description Keywords - Content


Hani Kanaan - CEA Leti

Micro LEDs are the latest development in SSL. They are used for high-quality displays and compete with OLED displays. Dr. Hani Kanaan, a renowned specialist in this field and also OLED technology, gave a sound introduction to this technology at LpS. LED professional wanted to know more, so we asked him for an interview. The topics range from current limitations to materials, processes, efficiency, thermal issues, costs, opportunities and much more.

Micro-LEDs, technology, application, challenges, efficiency, competition

LpS Best Papers

Best Papers @ LpS 2019: Degradation of Green High-Power LEDs – Influence on Color Stability of Multi-Channel Luminaires

In interior lighting, multi-channel RGB or RGBW luminaires are increasingly being used for daylight-like lighting illumination. In order to evaluate the color stability of multi-channel luminaires, commercially available red, green, blue and white high-power LEDs were examined with a focus on green GaN-LEDs because they show increased degradation. The LEDs were aged at four different junction temperatures at three different currents with a constant junction temperature, and the thermal resistances determined. The results of these tests and a simulation of multi-channel luminaires in regards to visible shifts in the color coordinates are presented. The influence on RGB and RGBW systems in order to guarantee color stability along the Planckian locus are compared.

Multi-channel LED lighting, RGB, RGBW, green LEDs, efficiency, degradation

flexible PCBs

New Flexible Luminaire Systems Based on Atmospheric Plasma Metallization

The core technology of the most flexible LED modules is the manufacturing of the PCB based on a copper material system. Atmospheric-plasma-metallization technology offers new solutions that go beyond the limits of the traditional process. In this article the author demonstrates new innovative flexible large area luminaries at high volumes in the roll-to-roll production method. The metallographic characterization of the deposited layer, which is crucial for the design of new flexible luminaires will be discussed, the added values explained and compared to other similar approaches. Finally, possible combinations to extend the use of the flexible luminaires are gone into.

Manufacturing, roll-to-roll, flexible modules, process, application

White LED, color conversion

Current Trends in LED Phosphor Development

LED phosphor, which is a kind of solid luminescent material, is used widely in white LEDs to convert the (usually blue) light of an LED chip into another wavelength light. Based on the GaN blue LED chip, white light LEDs composed of GaN LED+YAG yellow phosphors are rapidly commercialized and popularized. Afterward, the wavelength of LED phosphors was expanded from the pure visible light field (380-750 nm) to the vacuum ultraviolet and far-infrared (250-1200 nm). LED phosphor application cover general lighting to display backlight, agriculture / horticulture, medical health, security monitoring and other fields. This paper gives an overview of today's typical LED phosphors with their product system, synthesis, performance, respective areas, performance and application solutions.

Phosphors, spectra, stability, application, requirements, solutions

Thermal design, simulation 

Thermal Analysis of an LED Design – A Case Study

The adequate removal of heat flux and uniform power dissipation are the main goals in thermal management. In tackling this design challenge, electronics cooling emerges as the vital process of cooling components within electronic systems to prevent overheating and ensure performance. Presenting the case of an LED simulated with conjugate heat transfer analysis type, this article will explain the challenges in electronics design and dive into how to investigate heat flow and visualize temperature distribution to develop the best cooling strategy for a new product, while saving time and costs. The results from a cloud-based engineering simulation platform which allows a fast-virtual test of the CAD model, providing detailed insight into potential issues and optimization potential, will be presented in detail, with data regarding velocity, temperature, and airflow patterns.

Thermal management, analysis, simulation, heat flow

Applications / Special Topic:
Future Proof Systems & Solutions
What does future proof actually mean?

Cost and Benefit of Attempting Future Proof Solutions

Future proofness has always been a topic in the lighting and construction industry but never needed big discussions. Since the introduction of LEDs and digitalization, this has changed. It's now driven by a semiconductor business. This raises different questions. Among other things, the author discusses whether there is a definition, if we can we tell what future proof actually means without substantial and sound knowledge of the future and what the typical requirements are. Furthermore, some guidelines for the navigation in this field of uncertainty are given and the questions mentioned above are answered.

Futureproof, knowledge about the future, technologies, requirements, stakeholders

Applications / Special Topic:
Future Proof Systems & Solutions
Strategies of futureproofing

Lighting Controls – Futureproofing and Open Standards Lead the Way

The market for smart lighting and connected controls is growing at a good speed and will continue to do so in the foreseeable future. However, growth can always be higher. The article shows that a conscious strategy of futureproofing can help reduce risk perception among buyers and secure contracts. Research suggests that lighting control protocols is viewed as an essential component in futureproofing. Furthermore, forecasts say that various open protocols will become growth winners over the next couple of years.

Controls, hardware, software, open standards,

Product ads gain maximum impact when placed with the corresponding editorial theme! The editorial topics mentioned above are special features among a wide range of topics impacting the LED industry. Every issue also covers the latest industry news, technological breakthroughs, state-of-the-art products, and much more...

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TLCI + CRI 90-95 LEDs for Broadcast Illumination

TLCI + CRI 90-95 LEDs for Broadcast Illumination Optimize sports lighting for broadcast videography with the best possible illumination for eyes and cameras. Cree XLamp XP-L2 and XHP50.2 LEDs provide a natural "daylight" experience to indoor & night events while reducing the lighting intensity and manual color correction needed for excellent ... Read more »


Advanced "Super-Planckian" Material Exhibits LED-Like Light When Heated

Advanced "Super-Planckian" Material Exhibits LED-Like Light When Heated Could there be a new kind of light in the universe? Since the late 19th century, scientists have understood that, when heated, all materials emit light in a predictable spectrum of wavelengths. Research published this week in Nature Scientific Reports presents a material that emits light when ... Read more »


Ecosense Enters Replacement LED Lamp Business by Buying Soraa Shares

Ecosense Enters Replacement LED Lamp Business by Buying Soraa Shares Ecosense®, a leading LED technology company, announced today that it has acquired assets from Soraa, a designer and manufacturer of full-spectrum LED lamps based in Fremont, California. Under the terms of the deal, Ecosense acquires the Soraa name, intellectual property and lamps, including the ... Read more »


WEBINAR (May 14th): How to Achieve Better Products to the Eye Through Virtual Prototyping?

WEBINAR (May 14th): How to Achieve Better Products to the Eye Through Virtual Prototyping? In the CADFEM webinar on May, 14, 2020 you will learn, how physics-based simulations - virtual prototyping - contribute to develop better lighting products. The live presentation pictures the whole process - from editing the geometric model to the definition of light sources and sensors to the use ... Read more »