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当今的小尺寸彩色液晶显示器(liquid crystal display,简称LCD)大多数都采用白光发光二极管(ligt emining diode,简称LED)来作背光源。这些系统中通常包含带有一个发光二极管驱动电路的手持式装置,这种装置是由电池供电的,其输出电压随着时间变化。因此,一个性能最优的发光二极管驱动器设计需要一种能涵盖以下各项的系统化方法：电池类型；液晶显示器的特性；系统的功率需求及功率效率；发光二极管驱动器集成电路芯片及其外部组件；印刷电路板(printed circuit board,简称PCB)的布线及元件定位；可能的来自于发光二极管驱动器的噪声；手机应用设备中的射频噪声抑制能力(RF immunity)。
Most of today’s small-size color liquid crystal displays (LCDs) use a white light-emitting diode (LED) for backlighting. These systems usually include a handheld device with a light-emitting diode driver circuit that is battery-powered and whose output voltage varies over time. Therefore, one of the best performing LED driver designs requires a systematic approach that covers the following: battery type; LCD characteristics; system power requirements and power efficiency; LED driver ICs and their external components ; Wiring and component positioning of printed circuit boards (PCBs); possible noise from LED drivers; and RF immunity in mobile phone applications.