In 2009, in an effort to reduce global energy consumption, the EU Commission decided to move toward a complete ban of incandescent light sources by 2020. Their progressive replacement by highly efficient light sources is expected to reduce energy consumption for lighting by 30%.
Among all existing technologies, solid-state lighting (SSL) represents the solution of the future, however, according to a recent study (1), many SSL products do not fulfill the claimed specifications and a deep market penetration of LED modules is at risk. The main problems are decreasing light intensity and varying light chromaticity due to aging and temperature, as well as poor uniformity of large-area luminaires and poor lighting quality.
The main objective of the LASSIE-FP7 (Large Area Solid State Intelligent Efficient luminaires) consortium is to implement large-area and low-cost intelligent SSL modules with high efficiency and high lighting quality, while assessing their environmental footprint. The project targets in particular the professional and architectural lighting sectors. LED-based point source luminaires have been already investigated, but market requirements for intelligent, large-area solid-state light sources have not been met yet. In order to achieve luminaires with high intensity, good uniformity and high color rendering performance, significant intelligence has to be added to the LEDs.
The LASSIE-FP7 project aims to achieve progress beyond the state-of-the-art in terms of size, flexibility, efficiency, lighting quality and beam-shaping, lifetime, added intelligence for light out-put control, and production costs. It will do so by integrating light-management structures and new color-changing coatings with heat-management solutions and multispectral sensors for color-sensing feedback by means of an innovative roll-to-roll production technology compatible with flexible substrates. Outcome of the project will be a unique integrated SSL module that will represent a break-through in the professional and architectural lighting sectors and an alternative to the OLED technology.
LASSIE-FP7 addresses all the limitations of today´s SSL modules. The properties of a new product will create conditions favourable for the fast adoption of LED light applications and deployment of LED technology. The project targets the standard sizes for the professional lighting segment. This compatibility will ensure a fast deployment of intelligent LED luminaires.
A first conceptual demonstrator was fabricated, which consists of a luminaire from Regent Lighting that showcases the technologies developed within LASSIE-FP7: integration of LED foils with light management foils and color-changing films. Module parameters and target performances are as follows:
- Size: 1260 x 400 x 50 mm
- Size of the lighting surface: 1172 x 312 mm
- Efficacy: 180 lm/W
- Luminous flux: 500 lm (for a 400cm2 module)
- CCT: 3’000 K; 4’000 K; true color
- CRI: > 90
The project is focusing on the planar lighting as a primary target. By 2011 analysis, this is expected to be 0.8 – 1.2 mld. € market in 2017 (end of the project) and the developed know-how would be applicable to all of them, with the business focus on Professional and Architectural lighting sectors. The secondary target would be expanding to other segments of planar lighting segments – Retail and Residential (additional 0.3 mld. €) and to flexible luminaires (originally reachable only for OLEDs). The flexible luminaires will find its way in designer lighting where aesthetic plays predominant role.
LASSIE-FP7 builds on the competencies of the following partners: CSEM, Switzerland; Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung E.V, Germany; Teknologian Tutkimuskeskus/VTT, Finland; REGENT Beleuchtungskörper AG, Switzerland; BASF Schweiz AG, Switzerland; Fundacion GAIKER, Spain; LFoundry S.r.l., Italy; and AMIRES s.r.o., Czech Republic.
The project LASSIE-FP7 receives funding from the European Union Seventh Framework Programme, Grant Agreement No. 619556.
Further information is available at www.lassie-fp7.eu.
1 – L. Zuppiroli and D. Schlaepfer, “Lumières du futur”, (2011) and L. Zuppiroli, “Eclairages LED: à quels saints se vouer”, Electrosuisse Bulletin, 1 (2013), p.46.
Rolando Ferrini PhD. is a Head of Integrated Light Management section at CSEM (Swiss Centre for Electronics and Microtechnology) in Muttenz, division Thin Film Optics. He obtained his PhD degree in Physics in 1999 at the Università degli Studi di Pavia, Pavia, Italy, with a thesis on the optical properties of III-V semiconductor materials for electronics and optoelectronics. From 2000 to 2004, he was working as a Research Associate at the Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland, where he studied the optical properties of semiconductor-based photonic crystal devices. From 2000 to 2004, as a Senior Research Associate at EPFL, he was in charge of the activities on organic devices for optics, photonics and lighting in the framework of collaboration with ILFORD Imaging GmbH. In particular, he coordinated the activities of a mixed industrial-academic group working on the validation and the technology transfer of the ILFORD roll-to-roll printing techniques for optical and lighting applications. Since January 2014 he has been coordinating LASSIE-FP7 project.