本研究主要針對目前全球研發核心焦點的LED路燈，研製以市電三相電源直接供電給LED路燈，省去降壓變壓器，但能夠達到簡化亮度控制電路之目的，並且運用LED本身良好的節能特性，達成節能減碳政策的要求。本論文以簡單的矽控整流體(SCR)完成整流調光電路，達成以最省的電子元件，完成實用可調光之LED路燈設計，可大幅提升LED路燈照明的可靠度，且具備市場的競爭力。
有鑒於交流發光二極體(AC LED)的高閃爍率和其所產生總諧波失真率(THD)的現象，本論文經由實驗去證明三相電源驅動的LED路燈較單相電源驅動的LED在閃爍率和總諧波失真方面皆能呈現較好的改善，而此研究成果也可作為道路照明運作之參考。

The study of developing LED road lighting that devising the three-phase power source to provide electricity from distribution system to AC LED for road lighting luminaire directly without step-down voltage transformers and simplify the controlled circuit configuration. Additionally, the LED is used for its energy-saving property and meeting the requirement of national energy-saving and carbon reduction policy.
The study completed a practical dimmable circuit for LED road lighting by using SCR to set up the rectifying circuit. The reliability and marketing competitiveness of LED have been improved to verify the practiveness.
Meanwhile, the experiments show that the flikering and total harmonic distortion(THD) of AC LED driven by three-phase power have been reduced than driven by single-phase power source. The result could be a guidence for the road lighting.

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