本論文旨在研製全導通式交流發光二極體驅動電路，其目的在於有效改進AC LED之導通利用率，並藉少量元件達成單級功因修正與調光功能，逕以市電驅動AC LED時，其於低電壓期間因無法有效導通致使內部微晶粒利用率降低，而於高壓期間又有過電流衍至AC LED燒毀之虞。本文參考單級高功因電子安定器的架構，修改成適合交流發光二極體的驅動電路，電路架構，包含濾波器、降升壓式功因修正電路及半橋換流器。當半橋換流器產生的交流方波驅動交流發光二極體時，在導通的瞬間會產生突波電流，本文也會對此提出改善的辦法。最後將本文所使用單級高功因驅動電路跟市電直接驅動時比較，可以發現功率因數提高，積分球量測時光通量增加，可知交流發光二極體內部微晶粒數利用率提高。

The purpose of this thesis is to implement the driving circuit of AC LEDs. The main feature of the circuit is to improve the using rate of the chip in AC LEDs. The circuit uses a few components to achieve power factor correction and dimming. Therefore, the thesis proposes a modified structure of single- stage high power factor to drive AC LEDs. If AC LEDs have a lot of chips, AC LEDs has small conduction angle, low using rate of chip, and low power factor. On the other hand, if AC LEDs has few chips, AC LEDs may be out of order. The single-stage high power factor electronic ballast circuit includes filter, buck-boost converter, and half-bridge inverter. The thesis proposes a method to improve surge current when the switch turns on. Finally, comparing single-stage high power factor driving circuit to grid, single-stage high power factor driving circuit has high power factor and increase of luminous flux. In other words, the using rate of the chip in AC LEDs is increased.

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