 In organic light emitting diode, LED displays are expected to be the next generation of displays due to their high efficiency and long lifespan. However, they require more complex fabrication processes, which increase cost and reduce resolution. Large LED displays have already been commercialized for backlight sources in consumer electronics applications, while miniature LED displays are still being developed. These miniature LED displays offer improved contrast ratios at lower energy consumption compared to larger LED displays. Additionally, micro LED displays are still under development and will provide higher resolution and better color reproduction. This article was authored by Tingzhu Wu, Chin Wei Shui, Yulin, and others.