Design of Intelligent LED Dot-Matrix Display Screen System

Based on serial-parallel conversion and dynamic scan techniques,an intelligent LED display screen was designed.MCU(microcontroller unit) and some peripheral circuits were used in here.The device consists of some modules,such as MCU,LED display screen driving and display circuit,bright adjusting module,clock timing unit,voice prompt circuit,keyboard control and LCD(liquid crystal display).The word which is encoded is written into the MCU memory system.Using the control software,the MCU outputs the display characters into the LED display module by serials output circuit,the display circuit transmits the character data into vertical row of the screen.At the same time,the decoding and driving units scan continually to achieve the character displaying.Controlling the LED lightening time,the brightness of the LED display screen can be adjusted continuously.The display of real time and temperature is implemented through clock and temperature module.The most significant features of the design are that it implements the communications among several microchip,that the master and servant station can work simultaneously and that it realizes the separation of the control and display portions of the system.