Measurement-Based Multi-Domain Modeling of LEDs for “Industry 4.0”

The Industry 4.0 initiative targets the digitalization of design and manufacturing processes. The aim of the Delphi4LED project is to trigger this transition in the solid-state lighting industry by developing testing and modelling methodologies aimed at multi-domain characterization of LED based products. The multi-domain model sums up the following parts: the electrical and optical domain is based on semiconductor physics, for the latter the key is the balance of diffusion and recombination effects realistically representing the low-current and high-current decay of efficiency. The geometry domain defines the thermal boundary and supposed to be temperature independent. For the thermal domain compact modeling and model order reduction are discussed; the suggested model is based on the one previously proposed in DELPHI project. Finally a new JEDEC standard is proposed encompassing multiple thermal test environments for a power LED which enable identifying case boundaries.