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在设计数字钟表用CMOSLSI中,最重要的是使用什么样的显示器件并如何使用它。液晶显示器件虽然其寿命和温度特性亚于LED,但其功耗小却是出类拔萃的。然而,直流驱动缩短了液晶的命寿,因此不能象LED那样的使用它。液晶不仅功耗小,而且有必要在用不引起视觉浮动的频率的交流电源进行驱动。我们知道,人的视觉暂留为1/16秒,所以使用频率可选择在30～60赫芝附近。液晶驱动方式一般是静态
In the design of digital clocks CMOSLSI, the most important thing is what kind of display device and how to use it. Although the life of liquid crystal display devices and temperature characteristics of sub-LED, but its small power consumption is outstanding. However, the DC drive shortens the lifetime of the liquid crystal and therefore can not be used like an LED. Not only is the liquid crystal small in power consumption, but it is necessary to drive it with an AC power supply that does not cause visual floating. We know that the human visual persistence of 1/16 seconds, so the use of frequency can be selected in the vicinity of 30 to 60 Hertz. LCD drive mode is generally static