TCL subsidiary China Star (CSoT) demonstrated a 3.3" 232x116 transparent Micro-LED prototype display. The display is built on an Oxide-TFT (IGZO) backplane - CSoT says that this is the first such display ever demonstrated. The transparency is around 45%.
CSoT says that it developed the display in collaboration with PlayNitride that provided the transfer technology for CSoT.
China-based Tianma also demonstrated a transparent Micro-LED display developed with PlayNitride. TianMa's display is a 7.56" 720x480 (114 PPI) panel that features 60% transmittance. We do not know how transparent is CSoT's display.
In 2017 PlayNitride started to sample micro-LED panels and shipped samples to 10-20 potential customers. The company's chairman and CEO, Charles Li, said in June 2018 that 5-6 of these customers are continuing the developing of micro-LED modules based on these panels. Apparently both CSoT and Tianma are working with PlayNitride.
The video above also showcases some of CSoT's latest mini-LED displays, including a flexible one. The video also shows several new AMOLED displays and technologies by CSoT.