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针对液晶显示器的对比度调节需要可调负电压,本文介绍了模拟电位器调节、数字电位器调节、DC-DC变换调节这三种常用的获得可调负压的方法和典型的芯片应用,比较了各个方法的优缺点,以达到在不同场合选择合适方法的目的。
Contrast adjustment for liquid crystal display requires adjustable negative voltage, this article describes the analog potentiometer adjustment, digital potentiometer adjustment, DC-DC conversion of these three commonly used methods to obtain adjustable negative pressure and the typical chip applications, compared The advantages and disadvantages of each method in order to achieve the purpose of selecting the appropriate method in different occasions.