自激式冷陰極管螢光燈電子安定器

Self-excited Electronic Ballast for Cold Cathode Fluorescent Lamps

張鈞至(Chun-Chih Chang)

指導教授 ： 柯裕隆

崑山科技大學/工程學院/電機工程研究所/碩士(2009年)

摘要

本論文研製一個少元件之直流-交流轉換器之液晶顯示器背光源驅動器，其負載為一冷陰極燈管。電路架構包括推挽式電路，一方面作為並聯諧振，另一方面作為變壓器，在其二次側能產生正弦波的形狀並提供足夠交流高電壓以驅動燈管。另外，利用切換頻率的控制，可以改變諧振電路的阻抗特性，達到頻率調光的效果。文中詳細說明其動作原理及諧振電路參數之設計，由實驗結果驗證理論之正確性。

關鍵字

冷陰極燈管 ； 推挽式 ； 並聯諧振

並列摘要

This thesis implements a driver circuit for a liquid crystal display (LCD) backlight source for developing a DC-AC converter with few components, which is then connected to a cold cathode fluorescent lamp (CCFL) as the load. The circuit configuration includes a push-pull circuit, which provides parallel resonance and acts as a transformer that generates a sinusoidal waveform across the secondary winding. The circuit provides sufficiently high AC voltage to drive the lamps. Additionally, the impedance characteristics of the resonance circuit can be modified to set the dimming frequency. The work describes in detail the operating principles and design of the parameters of the resonance circuit. Experimental results demonstrate the theoretical effectiveness of the developed circuit.

並列關鍵字

cold cathode fluorescent lamp (CCFL) ； push-pull ； parallel resonance

參考文獻

[1] Y. L. Lin and A. F. Witulski,“Analysis and design of current-fed push-pull resonant inverters-cold cathode fluorescent lamp drivers, ”IEEE-IAS Conference Record, pp.2149-2152, 1996.

[2] M. Gulko, S. B. Yaakov, “Current-sourcing push-pull parallel-resonance inverter (CS-PPRI): theory and application as a discharge lamp driver,” IEEE Trans. Ind. Electron., vol.41, no.3 pp.285-291, June 1994

[3] M. Jordan and J. A. O’Connor, “Resonant fluorescent lamp converter provides efficient and compact solution, ”IEEE-APEC Conferenec Record, pp.424-431 , 1993

[4] 張智勝， ”冷陰極螢光燈控制電路之研製” ，成功大學，碩士論文，民國九十四年七月。

[6] 林瑞禮、林晃蒂、陳建富、梁從主，”Royer電子安定器之燈管電流均流控制技術” ，第二十五屆電力工程研討會，pp.2029-2035，2005年。