Recently, AI smart glasses equipped with displays and lightweight AR glasses have surged in popularity, finding widespread applications in diverse fields such as entertainment, movie viewing, translation, education, training, and healthcare. Within these devices, the near-eye display plays a pivotal role in image quality and user experience, constituting a substantial portion of the overall cost of XR terminals (encompassing AI smart glasses and AR glasses), thus emerging as a core component. Currently, manufacturers predominantly utilize three technologies for near-eye displays: LCoS, Micro OLED, and Micro LED. However, LCoS technology is often marred by backlight issues that hinder the achievement of a truly dark effect and incur higher power consumption. Consequently, there is a prevailing industry consensus that LCoS is unlikely to become the dominant technology in the future. Thus, this article primarily delves into the technologies of Micro OLED and Micro LED.