冷陰極管驅動電路之特性分析與控制

Characteristics Analysis and Control of CCFL Drive Circuit

黃國豪(Kuo-Hao Huang)

指導教授 ： 謝冠群

中原大學/工學院/電機工程研究所/碩士(2013年)

https://doi.org/10.6840/cycu201300640

摘要

本文提出一種應用於液晶顯示器之冷陰極螢光燈管(Cold-Cathode Fluorescent Lamp)背光源的控制方法，目的在於消除具低頻調變的燈管電流。依據迴路穩定準則，補償控制器的設計採用單極點Type I補償電路，並使用MATLAB軟體輔助設計，可完全消除燈管電流的低頻調變。最後實際設計出一部具有回授補償之推挽式換流器做為背光電源，所量測特性的實驗結果和理論推導十分相符。

關鍵字

冷陰極螢光燈管 ； 串聯諧振並聯負載 ； 補償器 ； 推挽式換流器

並列摘要

This thesis presents a control method to eliminate low-frequency modulation of the current of cold-cathode fluorescent lamp (CCFL) that is a backlight source for a liquid crystal display. Based on loop stability criteria, a compensation controller with Type I single-pole compensator is designed and simulated by using software-aided MATLAB approach, by which the low-frequency modulation of the lamp current can then be completely eliminated. Finally, a prototype of a push-pull inverter with feedback compensation is designed as backlight source to verify the predicted behavior. The measured experimental results are close to the theoretical evaluation.

並列關鍵字

Cold Cathode Fluorescent Lamp ； Series Resonant Parallel-Loaded ； Push-Pull Inverter ； Compensator

參考文獻

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