摘要
摘要 傳統的大尺寸液晶背光模組是經由數個冷陰極管(CCFL)提供其 充分的背光光源，但隨著環保議題漸受重視，含有毒性水銀的冷陰極 管將會被禁用，擁有驅動電路簡易、較廣範圍操作溫度、長壽命時間 改善與低且安全工作電壓的發光二極體(LED)便逐漸取代冷陰極管。 本篇論文設計適用於大尺吋液晶面板的LED 背光電路，RGB LED 背光電路的設計是利用脈波控制來調整LED 背光的輝度，在論文中 詳述討論，經由RGB LED 背光電路設計與模擬，實驗結果顯示所提 電路架構的可行性。 關鍵字：LCD 面板，RGB LED 背光，脈波控制調光，亮度調整
並列摘要
Abstract Conventionally, multiple cold cathode fluorescent lamps (CCFLs) are required to provide sufficient backlighting for a large-scale of LCD panels. Growing concerns about environmental issues will exhibit the use of CCFLs that contain poisonous mercury. Owing to improvement in long operative life, wider operation temperature range, and the simplicity of driver circuit: work with low and safe voltages, LED has gradually substituted for CCFL as backlight. In this thesis, a LED backlight circuit for a large-scale LCD panel is studied. The design considerations for RGB LED backlighting circuit are discussed in detail. Burst-mode dimming control is designed to achieve the brightness regulation of the backlighting LEDs. A laboratory prototype for the studied RGB LED backlight circuit is implemented and tested. The experimental results of the prototype circuit are shown and discussed to verify the proposed scheme.