基于CPLD/FPGA的串行LED显示电路模块化设计

Modularization design of serial LED display circuit based on CPLD/FPGA

给出了一个基于C PL D/FPG A设计的软件模块化L E D显示电路.通过串行扫描方式驱动LE D数码管,可较少地占用可编程器件资源;并利用M A X P LU S II对动态扫描L E D显示电路进行仿真.最后,对动态扫描显示下数码管的亮度降低的原因进行分析,认为采用降低扫描频率,增大脉冲光对人眼的作用时间和增大驱动电流来提高LE D显示器亮度.

The paper gave a design of software modularization LED display circuit based on CPLD/FPGA. The method of serial scan derived LED that could take up less programmable device resources,and simulate dynamic scanning LED display circuit with MAXPLUSⅡ. Finally,the bright of the serial scan LED display decreased reason was discussed. The paper pointed that adoption lowered the scanning frequency,and enlarging the pulse light of function time to naked eyes and enlarging the drive electric current could increase the bright degree of the LED displayer.