INFLUENCES ON LED OPTICAL CHARACTERISTICS WHEN VARYING ZNS PARTICLE SIZES IMPACTING SCATTERING COEFFICIENTS

Abstract

This study explores the impact of varying zinc sulfide (ZnS) particle sizes on the optical performance of white light-emitting diodes (LEDs), with a focus on parameters such as lumen output, correlated color temperature (CCT), color rendering index (CRI), and color quality scale (CQS). Using Mie scattering theory and MATLAB simulations, we investigated LEDs with ZnS particles of different sizes to determine their effects on light scattering and color fidelity. The results indicate that larger ZnS particles enhance scattering, thereby reducing lumen output and increasing CCT deviation, while improving light uniformity. However, this trade-off can impact CRI and CQS, where larger particles generally produce a slightly lower CRI. The study underscores the importance of selecting an optimal ZnS particle size to balance luminous efficacy and color accuracy, contributing practical insights for designing LEDs with improved performance and color stability in diverse lighting applications.