The development trend of LED display includes technical development, market demand, application fields, etc. With the continuous progress of technology, the brightness, contrast, color reproduction, clarity and other indicators of LED display are improving, while the power consumption and life span of LED display are also improving. In terms of market demand, the application fields of LED display are expanding, such as stadiums, cinemas, hospitals, etc. In terms of application fields, the application occasions of LED display are increasing, such as smart home, intelligent transportation, etc.