【摘要】 液晶显示器在信息显示技术中得到了越来越广泛的应用。作为液晶显示的主要部分之一的电源电路，直接控制提供给液晶驱动芯片的偏压。电源电路的电压的高低将直接影响液晶显示器的灰度调整和对比度的变化。ＭＡＸ６８６是Ｍａｘｉｍ公司生产的用于提供液晶偏压的电源器件。ＭＡＸ６８６能够转换液晶所需的正极性或负极性偏压的集成电路，有很强的灵活性，其内部有６ｂｉｔ的数模转换器．可用数字方式调整输出电压。因此，可以很方便地用软件或硬件来调整输出电压。ＭＡＸ６８６的高集成度为其节省了体积，减小了功耗，增加了电池的寿命，使其非常适用于电池供电的便携式仪器中。更多还原

【Abstract】 LCD has been widely applied to display system. As a main part of LCD, the supply circuit directly controls the driving circuit level of LCD. The level of supply affects the grey scale and contrast of LCD. The application of MAX686 in LCD is introduced. MAX686 can produce the positive or negative LCD bias supply according to the demand of LCD model. It has a flexible application. It has an internal 6-bit digital-to-analog converter (DAC) for digital adjustment of the output voltage. As a result, it is convenient to adjust the output voltage using software or hardware. MAX686 offers high-level integration to save space, reduce power consumption, and increase battery life, making it an excellent choice for battery-powered portable equipment.更多还原