本論文主要研製一適用於電致發光顯示器(Electroluminescent Display，ELD)之驅動電源，其主電路架構採用昇壓型功率因數修正轉換器及全橋變頻器兩級串接的形式實現，以提供ELD所需的交流電源。架構中之SPWM控制信號由PIC16F873A微控制器產生，可以有效降低ELD驅動電流，使其遠小於10mA/nF，有利於延長ELD壽命。至於驅動IC的電源部分，本文製作輔助電源分別供電給PIC微控制器及閘極驅動電路，方便直接以市電運作。而本文中亦實現輸出亮度控制電路，在ELD產生老化現象時(內部等效電容值會逐漸下降，而內部等效電阻值會逐漸上升)，調整變頻器輸出頻率，維持ELD之輸出亮度，增加ELD的有效工作時間。

A suitable AC power supply for the Electroluminescent Display is presented in this thesis. The circuit mainly consists of a front-stage power factor corrector and a single-phase full-bridge inverter. A PIC16F873A microcontroller produces SPWM signals which can reduce the ELD driving current to be much lower than 10mA/nF and help to extend the lamp lifetime. An axuiliary power supply is designed for the PIC microcontroller and the PowerMOS gate driver, so that the circuit can be directly operated via AC line. The output brightness control circuit is also proposed in this thesis. After a long time of usage and the aging of ELD happen, the circuit will adjust the output frequency to maintain the ELD output brightness and increase the effective working hours.

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