Principle Of LED Display Screen

The main controller of the LED display screen converts the signal displayed by the computer as a card into the data and control signal format required for the LED display screen. The main controller obtains the brightness data of each pixel on a screen from the computer display card, and then allocates it to several scanning boards. Each scanning board is responsible for controlling several rows/columns on the LED display screen, and the LED display signals on each row/column are cascaded and transmitted through the various display control units in the row in a serial manner, with each display control unit directly facing the LED display screen body. Display control single operation generally consists of a shift register latch with grayscale control function. On the one hand, the scanning trigger receives video signals from the main controller, and on the other hand, it transmits data belonging to its own level to its various display control units. At the same time, it also transfers data that does not belong to its level to the next cascaded scanning trigger. Video signals and LED display data require a scanning board to coordinate the differences in space, time, sequence, and other aspects.