用于LCD测试系统的程控驱动器设计

为了制作一款用于LCD测试系统的程控驱动器,采用基于嵌入式系统ARM7实现程序控制,内建DC/DC升压电路和DC/AC转换电路,以提供直流电源和产生驱动脉冲信号,电源内建/外接可选,其信号输出端按一定时序产生特定的连续脉冲, 供给LCD 屏的行列电极作驱动源, 从而使被选行与被选列交叉位置上的液晶像素或笔段在电场作用下呈现显示状态（遮光或透光） 。该系统输出的工作电压峰值、频率、占空比均可调,是一款低功耗、低输出阻抗的LCD程控驱动器。

Design of Program-controlled Driver Used for LCD Test System

Main task of this design is to create a program-controlled driver for the LCD test system. The program-controlled driver achieves the process control based on embedded ARMT, built-in DC / DC boost circuit and DC / AC conversion circuit are used to provide a DC power supply and generate the drive pulse signal, the buih-in power / external optional can be selected. Its output signals generate the pulses by the certain specific timing, and provide the row/column electrodes of the LCD screen as the drivers so that the LCD pixels or strokes on the cross-listed location of the row and column elected are at the display status （Shading or translucent） in the electric field. The system＇s output voltage peak and frequency, duty cycle can be transferred. The system is a LCD program controlled driver with the low power consumption and the low output impedance.