Abstract：MCU-based of LED big display screen design The LED display screen is to make use of light-emitting diode lattice module or the flat surface style that the pixel element is composed of demonstrates a screen. Because it has luminescence rate height , life time strong point , the group state are nimble , the color is rich as well as acclimatization waits for merit by force to interior external environment, the information at present already in the station , bond institute , sports ground mansion , traffic main road and interior , external various display occasion is announced, public good propagate, environment parameter real time, the significant activity countdown waits to be applied broadly. The main body of a book be the LED large screen electron beam screen that the monolithic machine controls-based design, Entire system is that the hardware designs that the part and the software design a part mark. The hardware design part is centering on 8051 monolithic machine, Come 74 LS154 and 16 column drive controlling sixteen line drive to drive display screen display 74HC595, Originally systematic entire screen can demonstrate eight Chinese characters , adopt 32 piece of 8 X period of time LED at 8 o'clock displays module to come to be composed of 16 X period of time display for 128 points patterns; The software design part adopt assembler realization mainly , what be demonstrated the Chinese character matrix code abstracting a software from special matrix draws. Demonstrate the display way adopt development scanning method , its to be to enter , move take place can make characters come true effortlessly moving one kind. Have compiled and translated by wave translator-editor, and have carried out what this system weaves a program successfully under Proteus software to simulate. Systematic simulated result certificate procedure display effect is fairly good.
Key words: Monolithic machine; LED; Lattice Chinese character; The matrix is extracte
