Technologies | Optics | Manufacturing | Displays | Feb 23, 2018

VTT and Neonelektro Have Made LED Advertising Boards Light, Flexible and Energy-Efficient

Through a European project, VTT Technical Research Centre of Finland and Neonelektro have developed new types of LED displays that combine the flexibility, low cost and high technical performance enabled by roll-to-roll mass manufacturing technology.

"Flexible, light weight, and of an easily customisable size, the LED advertising panel enables the creation of a dynamic look for a large area applications, or those that require a 3D shape, such as vehicles," says Project Manager Eveliina Juntunen of VTT.

The OptIntegral project, which was completed at the end of January, used a hybrid integration manufacturing process (combining injection moulding and printed electronics), in which the flexible electronics substrate was immersed in an overmoulded polymer. Overmoulding protects the components and enables additional features, such as optical and mechanical structures to be integrated during a single processing step.

This technology was applied to the production of large area LED displays during the project. Overmoulding was used to add optical structures to the display elements, improving the visual appearance of the product. In addition, VTT's measurements indicate that overmoulding lowers the temperature of the LEDs by around 20%, which is significant in terms of the reliability and efficiency of LEDs. This makes the displays energy-efficient, lightweight, flexible and even three-dimensional.

VTT Technical Research Centre of Finland (VTT) used a roll-to-roll process to make flexible LED substrates for the displays, refining the process to make it more productive. Neonelektro Oy developed an overmoulded RGB display element manufactured using the roll-to-roll technique.

"Interest in dynamic backlighting has grown dramatically during the project, and we have developed a new product family based on it. Developing a technology to meet such demand has opened up new markets for us," says Matti Koponen, who is in charge of product development at Neonelektro.

The project was coordinated by the Spanish organisation Eurecat, The Technology Centre of Catalonia. In addition to the Finnish partners, the consortium included the Spanish firm SnellOptics and the Spanish Association for Standardisation (UNE), LumyComp and Megatex from Bulgaria, Holografika from Hungary, and the University of Bath from the United Kingdom. The project was funded by the European Commission's Horizon 2020 program.

About VTT Technical Research Centre of Finland Ltd:

VTT Technical Research Centre of Finland Ltd is the leading research and technology company in the Nordic countries. We use our research and knowledge to provide expert services for our domestic and international customers and partners, and for both private and public sectors.  We use 4,000,000 hours of brainpower a year to develop new technological solutions.

FEATURED

BJB Connection Interface for Outdoor LED Modules

BJB Connection Interface for Outdoor LED Modules The model for the future design of human living areas is a "smart city" with intelligent technologies and applications. Smart Cities utilize sensors and controllers in outdoor lighting to conserve resources and enhance human comfort and safety. Read more »

FEATURED

Cree Launches Industry’s Highest Efficacy 90 CRI COB LEDs

Cree Launches Industry’s Highest Efficacy 90 CRI COB LEDs Cree, Inc. announces the XLamp® eTone™ LEDs, a breakthrough set of chip-on-board (COB) LEDs that delivers beautiful 90 color rendering index (CRI) light quality at the same efficacy as today’s standard 80 CRI LEDs. Delivering up to 155 lumens per watt (LPW) at 3000K CCT, 85°C, Cree’s new eTone COB ... Read more »

FEATURED

Nanosilica Filled Epoxy with High Abrasion Resistance

Nanosilica Filled Epoxy with High Abrasion Resistance Master Bond EP30NS is a two component epoxy system that cures at room temperature or more rapidly at elevated temperatures. It is optically clear especially in thin sections and can be used as an adhesive, sealant, coating and encapsulation compound. EP30NS offers dimensional stability, linear ... Read more »

FEATURED

WHITE PAPER - How to Overcome the Security Challenges of Smart Lighting

WHITE PAPER - How to Overcome the Security Challenges of Smart Lighting IoT-powered lighting systems are backbones for smart building applications such as energy harvesting, space optimization, and predictive maintenance. Read more »

EDITORIAL

High Conductive Foils Enabling Large Area Lighting

High Conductive Foils Enabling Large Area Lighting Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP as one of the leading partners for research and development for surface technologies and organic electronics and Sefar AG, a leading manufacturer of precision fabrics from monofilaments, developed a roll-to-roll ... Read more »

page_peel