LED display is a display device composed of light-emitting diodes (LEDs), which can be used to display text, images, videos and other information. The structure of the LED display includes LED lamp beads, circuit boards, masks and other parts. Its working principle is to use the light emitted by the LED lamp beads to control the control circuit on the circuit board, so as to achieve the purpose of displaying information. The technical indicators of the LED display include brightness, contrast, color reproduction, clarity, etc. These indicators determine the display effect of the LED display. 

The application of LED display screen includes outdoor advertisement, indoor advertisement, digital advertisement, instruction navigation, data display, safety warning, entertainment display, conference display, dispatching command, etc. These applications require LED display screen to display relevant information.