Abstract: The traditional large-scale LED display monitor system takes monolithic integrated circuit MCU,ARM or PLD as the core control chip.It is complex to design the LED display monitor control system which takes FPGA as the core and the high performance FPGA chip is basic for the design.But the LED display monitor control system using microprocessor as the core is not nimble enough,so when changing the LED screen demonstration size,it's necessary to revise the system design a lot.Although PLD has a great enhancement in the processing speed and can control the multi-modules to demonstrate well,it is inferior to FPGA obviously in the sequence circuit description aspect.This paper proposes a large-scale LED display monitor system design plan based on FPGA and the monolithic integrated circuit MCU.In this system FPGA is the focus control unit,and the monolithic integrated circuit is the scanning control unit.This plan may simplify the circuit and enhance the system's flexibility and reliability.The practice simulation result indicates that the system has great demonstration content and can well support the color display and reduce the power loss.It realizes the on-the-spot real-time control demonstration.

Key words: large LED display screen, singlechip, FPGA