The minimal set of IVL measurements to characterize power LED chips

Accurate characterization of power LED chips is crucial for their efficient utilization. This research aims to determine the minimal number and handout of IVL measurements required for characterizing power LED chips. Through detailed IVL characterizations, we investigate the precision of the digital twin of the LED by selectively neglecting specific measurement points. With this method and with our novel parameter extraction method a remarkable reduction in the required number of measurements from 40 points to 15 is demonstrated while maintaining a low level of error within 1% for voltage and 5% for emitted light power. These findings carry significant implications, including substantial reductions in measurement time, cost savings, and enhanced efficiency in LED characterization. Based on our investigation of 60 power LED chips, we have determined that characterizing these chips can be achieved using a reduced set of measurements. Specifically, we found that measuring 15 points at three different temperatures and utilizing 4-5 forward currents is sufficient for effective characterization of the power LED chips.