This thesis introduces the design of a practical LED dot matrix display. The computer changes the Chinese characters and digital information required to display into the corresponding code. Then the corresponding code will be sent to the LPC2103 through serial interface .According to the data received, the LPC2103 reads the Chinese characters and digital dot-matrix display data from Font-chip GT23L32SW. Then LPC2103 control the basic characters’ moving direction speed and relational instructions on the display with the computer. The upper and lower machine realizes serial data communication with MAX232 chip. This thesis simply introduces the process of getting the required Chinese characters, controlling of their direction and speed by Delphi and the realizing of series communication between PC and MCU. Next this thesis puts its importance on the design and realizing of the hardware in the whole process. MsComm Serial communication control offered by Delphi implements the computer’s communication procedure. The procedure of single-chip is finished with C language.
Keywords: LED display，LPC2103，dot matrix，Font，Serial communication
