INTER LABORATORY COMPARISON OF LED MEASUREMENTS AIMED AS INPUT FOR MULTI-DOMAIN COMPACT MODEL DEVELOPMENT WITHIN A EUROPEAN-WIDE R&D PROJECT (PP16, 569-579)

The European project Delphi4LED (launched within the framework of the EU?s H2020 ECSEL program in 2016) is aimed at the development of new LED compact models that can improve the design LED based lighting products at all integration levels along the SSL supply chain. The compact thermal models of LED packages and the multi-domain models of the LED chips are foreseen to be identified from measured LED characteristics. When setting the targeted accuracy levels of these models one needs to be aware how accurately and with what uncertainty the required LED characteristics can be measured by the application of the latest available LED testing standards. Therefore, the Delphi4LED consortium decided to start an inter-laboratory comparison of measurements of five different representative LED types. The methodology complies the most recent LED thermal testing standards and the new CIE test methods for optical measurements of high power LEDs. As such it is the first occasion to embrace these concepts at international level and should pave the way for broader use.