提出一种基于扫描方式模拟实现PWM功能的全彩色显示屏方案.该方案使用D触发器进行信息存储及LED通断控制,通过向D触发器写入信息控制LED的工作状态,按照PWM序列串值对D触发器周期循环写入来模拟实现PWM控制功能.详细介绍了系统的工作原理,设计实现了扫描控制器,并分析了系统参数及可行性.该方案的功耗及成本较低,具有功能上的灵活性,消除了传统扫描方式中闪烁及亮度损失问题,并具有较好的电源完整性及信号完整性.
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