UCLA

In the past few years, there has been a growing requirement for the development and innovation of MicroLED displays that can outperform Liquid Crystal Displays (LCDs) or Organic Light-Emitting Diodes (OLEDs) in terms of dynamic color range, contrast ratios, and brightness. This increased demand is mainly driven by the emergence of new application areas, such as wearable Virtual Reality (VR), Augmented Reality (AR) devices, Head-Up Displays (HUDs), and advancement in Optogenetics. Various companies have presented prototype MicroLED displays primarily in the form of large displays and smartwatches. However, there are still several challenges that need to be overcome before these displays can be commercially available. One of the technical challenges faced by the MicroLED displays is optical crosstalk. In this study, a method has been developed to quantify the optical crosstalk in the Quantum Dot-based flexible MicroLED display. The effect of features such as the gap between the MicroLED and the Q.D. layers, pixel dimensions, pitch length, and misalignment distance on the overall optical crosstalk of the display has been analyzed. Experimental analysis of optical crosstalk of MicroLED display with different features has been done to validate the ray-tracing model developed. Comprehensive analytical and experimental studies of the optical crosstalk have been done in this work.