点阵式LCD在语音终端的应用

Application of Dot-matrix LCD in Speech Terminal

点阵式LCD(液晶)显示器件,具有功耗低,体积小,显示信息丰富的优点,并广泛地应用在自动化仪表中。为了提供友好的用户界面,语音终端采用点阵式LCD作为显示部件。详细介绍了点阵式LCD同MCS-51单片机的接口电路及相应的软件设计。解释了16芯端口各信号线的含义,给出了LCD的初始化程序,并介绍了汉字和菜单的显示原理。液晶显示模块的采用使得语音终端硬件设计简单,同时汉字和菜单显示技术的使用使得用户界面更加美观。最后讨论了液晶对比度调节的问题并给出了解决办法。

Dot-matrix LCD makes a feature of low power dissipation,small volume,and displaying more information,also widely used in automatic instrument.To provide more better user interface, dot-matrix LCD is used as a displayer.The interface circuit for dot-matrix LCD with MCS-51 singlechip microcomputer and the design of software corresponding are described in detail.Meanings of sixteen signal wires of a port is explained.the initial program of LCD is given,and the principle of Chinese charater and menu display is introduced. The hardware design of speech terminal is simple with a LCD module,while the user interface is more beautiful with the technology of chinese character and menu display. The adjustment of LCD contrast is discussed,and the solution is given.