平面螢光燈本身為平面光源，可節省光學組件使用，減少背光模組厚度，將有利於液晶顯示器朝大尺寸發展。本論文首先探討平面螢光燈之結構、發光原理及電氣特性，並分析平面螢光燈之負載特性，使得驅動電路設計上能符合平面螢光燈所需之啟動機制因而確實啟動。而為使平面螢光燈操作在穩定狀態以提升發光品質，因此藉由回授控制並結合脈寬調變之調光方式，即控制調光訊號導通率改變平面螢光燈平均電流以達調光之目的，使得平面螢光燈具有寬廣且線性之調光範圍。最後本論文研製平面螢光燈背光驅動電路，並針對不同操作參數做設計，選取適合之操作參數，使平面螢光燈為均勻面光源。

Flat fluorescent lamp (FFL) is a flat luminous source that can save the optical unit of backlight modules, so that LCD is appropriate for development of large size. This thesis presents discussion about structure, luminance principles and electrical characteristics of FFL then analyzes load characteristics so that FFL can conform to the starting rules in design the driving circuit. In order to providing FFL can operate in the steady state and can improve luminance qualities, the system use feedback control and control duty cycle of dimming signal to regulate the brightness of FFL, so as to obtain linear and wide dimming range. Finally, a backlight driving circuit of FFL is made then analyzed under different operation parameters, so as to obtain a uniform luminance source.

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