研究生: |
鄭洲廷 Chou-Ting Cheng |
---|---|
論文名稱: |
高壓輸入之多組冷陰極管背光電源研製 Design and Implementation of a High-voltage Input Backlight Driver for Mutltiple CCFLs |
指導教授: |
羅有綱
Yu-Kang Lo 邱煌仁 Huang-Jen Chiu |
口試委員: |
歐勝源
Sheng-Yuan Ou 劉益華 Yi-Hua Liu |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2009 |
畢業學年度: | 97 |
語文別: | 中文 |
論文頁數: | 74 |
中文關鍵詞: | 高壓輸入 、冷陰極管 、均流平衡 、串聯諧振並聯負載 、液晶顯示器 |
外文關鍵詞: | high-voltage input, CCFL, current balance, series-resonant parallel-loaded, LCD |
相關次數: | 點閱:323 下載:1 |
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本論文研製一台高壓輸入之多組冷陰極管背光電源雛型電路,採用半橋串聯諧振並聯負載換流器形式轉換器架構。其優點為可省卻一級DC/DC轉換器,降低額外的功率損耗,節省電路成本與體積。本論文實作出驅動液晶顯示器內含20根燈管,利用Jin-Balance電路實現多燈管均流平衡及各項保護功能,並利用電流回授機制,完成冷陰極管輝度控制與穩定之功效。調光控制使用Burst mode調光,最後將模擬與量測結果相互印證。
This thesis is to design and implement a prototype of high-voltage input multi-CCFL backlight. Its configuration is a half bridge series-resonant parallel-loaded inverter. Its advantage is to eliminate a DC-DC converter. It reduces the power consumption, cost and circuit volume. In this thesis, a driving circuit for 20-tube LCD backlight with current balance based on Jin-Balance circuit and protection is implemented. By using the feedback of driving current for tube, the backlight driver realizes the control in multi-CCFL brightness. A burst mode is applied in dimming control. Finally, the simulation and experimental results are compared each other.
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