As the technology of microelectronics developing fast, the display is one of the important means to the direct access to all kinds of information. LED (Light Emitting Diode) display is the late 1980s and the rapid development of the new information in the global media show, It posed by the use of LED dot matrix module or modules in the area of the display screen pixel, high reliability, long lifetime, ability to adapt to the local environment, the price performance ratio and the use of low cost, in a short period of 10 years. Rapid growth in the mainstream of flat panel display products in a wide range of fields of information display applications.
This paper introduces how to design a kind of LED dot matrix display. It utilizes PC(Personal Computer)to translate basic characters into dot matrix data. Then the data are sent to the AT89C52. AT89C52 controls the LED dot matrix display utilizing the receiving data. Meanwhile, the system realizes to control the moving direction and speed of the basic characters. It introduces the process of translating chinese characters into dot matrix data，the process of direction and speed controlling, the realizing of series communication between PC and MCU utilizing C++ on PC, and puts attention on the design and realizing of the hardware briefly.
Keywords: LED display; AT89C52; dot matrix
