OLED is currently used in a wide variety of medical devices, with lightweight structures and convenient design. This is very useful for achieving conformal light sources for objects, and is not limited to the display screen of smart watches. It can also play an important role in the field of mobile medicine. For example, health monitoring sensors measure important human signals, such as heart rate and blood oxygen levels, as well as optical patches for advanced wound care or skin care, Enables daily activities ranging from health tracking to biological signal monitoring for infants, patients with chronic diseases, or discharged patients after surgery.