恒流源LED触摸台灯的设计

LED（发光二极管）以高效、低耗、发光柔和见长。用它作照明是一个发展方向。LED的伏安特性决定了它最好采用恒流源供电；为方便操作、减小机械磨损、降低故障率采用触模式调光是一种不错的选择。为解决停电麻烦增加后备供电也是必要的，此时LED的低耗特性显示出巨大的优势。设计采用特殊的恒流电路、电源管理电路和触摸防抖动电路使LED扬长避短，工作稳定可靠。

A Design of Constant Current LED Desk Lamp Controlled by Touching

The LED(light emitter diode) has the merits of high effective,low consumption and gentle illumination.The illumination with it is the developing direction.Its characteristic of voltage-current is decided that the best power-supply for LED is the constant current.In order to facilitate the operation,decrease the wear of machinery and reduce the failure rate,the light adjusting with touching-typed is one of the good choices.In order to solve the power cut trouble,it is also necessary to increase the reserve power supply.So the huge superiority of LED is demonstrated with its characteristic of low consumption.This design uses the special constant current electric circuit;the power management electric circuit and touching guard electric circuit against the vibration to enhance the strong points of LED and avoid the weaknesses of it to make the work stable and reliable.