一种长距离多位LED显示器的设计

Design of long distance and lots of LEDs' display

针对LED显示器只能就地显示,且与控制器的接口受制于LED位数的问题,提出采用电流驱动的方法以增加连 线长度,采用串行数据传送的方式使LED位数可以随意改变,而接口标准不变。并给出了详细的硬件电路设计。实践 证明,显示器可在远距离进行稳定可靠的显示。

To the problem that LED display can only be close used and the interface with the controller is relative to the number of LED, the distance between the LED display and the controller is longed by means of current driving and the interface doesn' t vary with the number of LED by serial data transfer. The detailed curcuit is presented. The experiment result shows that the display work reliably at distance.