用到段码液晶屏，一般是用专用驱动芯片如：HT1621等，考虑到，成本、功耗，决定用单片机直接驱动。液晶屏手册建议用1/3偏压，求简单用1/2偏压，实际搭了个实验板试了一下，效果还是不错的。实际可将分压电阻R2-29加大到1M，和用CPU的一个脚来驱动（可关断），进一步减小功耗，现贴出原理图、程序、照片，供有用者参考。

-Used Segment LCD, special driver chip, such as: HT1621, taking into account cost, power consumption, and decided to use the single-chip direct drive. LCD manual recommends 1/3 bias, 1/2 bias the sake of simplicity, the actual take a experimental board tried it, the effect is good. The actual dividing resistor R2-29 increased to 1M, and with a pin to drive the CPU (OFF), and further reduce power consumption, schematics, procedures, Photos were posted, useful for reference.