At present, there is no industry standard for the definition of Micro LED, and different scholars and experts have different understandings of Micro LED for different application scenarios and research environments.

The display application scenario is the main factor determining the size of Micro LED chips. From the perspective of consumer electronics terminal applications, the definition of Micro LED should be calculated based on viewing distance and the ultimate resolution of the human eye.

For example, if calculated based on the luminous area accounting for 10% of the pixel area. In virtual reality VR and enhanced display AR applications, the viewing distance is about 5cm and the pixel density needs to reach around 1800ppi. At this point, the size of the Micro LED chip should be 3-5 μ M. For 10 to 12 inch flat panel displays, the corresponding chip size is 20 to 30 at a pixel density of 300ppi μ M. For 75 inch large screen displays, with a pixel density of 43ppi, the chip size is often around 200 μ About m.