研究生: |
吳明佳 Ming-chia Wu |
---|---|
論文名稱: |
混合調光式冷陰極管換流器之研製 Realization study of Hybrid Dimming Control for CCFL Inverter |
指導教授: |
謝冠群
Guan-Chyun Hsieh 柳宗禹 Tzong-Yeu Leou |
口試委員: |
蔡明傑
none 劉志文 none 林長華 Chang-Hua Lin |
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: | 2007 |
畢業學年度: | 95 |
語文別: | 中文 |
論文頁數: | 80 |
中文關鍵詞: | 冷陰極螢光燈 、自激式換流器 、脈衝調光 |
外文關鍵詞: | CCFL, Self-excited inverter, Burst dimming |
相關次數: | 點閱:343 下載:0 |
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本論文提出一應用於自激式Royer換流器之混合式調光控制器(Hybrid Dimming Controller),該控制器包含了具同步控制的時滯調節式脈波寬度調變控制器(Dead-Time-Modulated Pulse-Width-Modulation Controller,DTM-PWM)及軟切換脈衝調變控制電路(Soft-Burst Circuit)。本文中為了降低寄生電容所造成之漏電流影響,將傳統二次側(Secondary Side)回授改採由一次側(Primary Side)回授,使架構中的冷陰極螢光燈管與系統地端完全隔離;並採用了時滯調節式脈波寬度調變控制器,以提昇系統整體效率、降低開關頻率和諧振頻率不同所產生之諧波干擾,同時為了增加調光範圍及消除舊式脈衝調光(Burst Dimming)在每一個週期起動時所造成的燈管電流及電壓突波,另採用了一軟切換脈衝調變技術來做為調光控制。本文除了詳細說明所提之電路架構其各元件值之設計考量及設計方式外,並實際設計出一換流器,然後進行其特性規格之量測,其實驗結果和理論推導十分相符。
This thesis proposes a hybrid dimming controller for self-oscillation Royer inverter. The hybrid dimming controller is composed of a dead-time-modulated pulse-width-modulation (DTM-PWM) controller and a soft-burst circuit. To reduce leakage current resulted from parasitic capacitance in the lamp, we utilize floating lamp structure with primary-side dimming control in this study. In order to increase the overall system efficiency and reduce EMI resulted from the difference between buck drives frequency and Royer resonant frequency we use the dead-time-modulated pulse-width-modulation controller. Besides, a soft-burst technique is adopted for eliminating the ignition current and voltage spike during dimming process. Comprehensive analysis and design considerations are discussed in detail in this thesis. An inverter is actually designed according to this thesis, which indicates that experimental results are close to the theoretical prediction.
[1]J. Willams, “Techniques illuminate backlit LCDs with high efficiency,” EDN Mag., pp. 89-94, Jan. 6, 1994.
[2]M. Gulko and S. B. Yaakov, “Current-sourcing push-pull parallel-resonance inverter (CS-PPRI): theory and application as discharge lamp driver,” IEEE Tran. 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’93, pp. 424-431, 1993.
[4]M. S. Lin, W. J. Ho, F. Y. Shih, D. Y. Chen and Y. P. Wu, “A cold-cathode fluorescent lamp driver circuit with synchronous primary-side dimming control,” IEEE Tran. Ind. Electron, vol. 45, no. 2, pp. 249-255, April 1998.
[5]G. C. Hsieh, C. H. Lin, C. H. Lin and H. I. Hsieh, “Primary-side charge-pump dimming controller for the cold-cathode fluorescent lamp ballast,” Proc. IEEE TENCON. 2001, pp. 717-723, 2001.
[6]G. C. Hsieh, C. C. Chu and P. S. Hsu, “Dead-time-modulated synchronous PWM controller for dimmable CCFL royer inverter,” Proc. LASTED CSS 2004, Florida pp. 1042-1049, Nov. 2004.
[7]Y. L. Lin and A. F. Witulski, “Analysis and design of current-fed push-pull resonant inverters-cold cathode fluorescent lamp drivers,” Proc. IEEE IAS Conference Record, pp. 2149-2152, 1996.
[8]J. A. Donahue, P.E. and M. M. Jovanovic, “The LCC inverter as a cold cathode fluorescent lamp driver,” IEEE APEC, pp427-433, 1994.
[9]“Dimming cold-cathode fluorescent lamp ballast design using the UC-3871,” Application note U-148, Portable Products(PP), Texas Instruments Inc., 1999
[10]J. Williams, “A fourth generation of LCD backlight technology,” Linear Technology AN-65, Nov. 1995.
[11]J. A. Sierra and W. Kaiser, “Comparison of fluorescent lamp high frequency parallel resonant electronic ballast,” IEEE IAS Conference Record, pp.1149-1156, 1990.
[12]M. K. Kazimierczuk and R. C. Cravens II, “Current-source parallel-resonant DC/AC inverter with transformer,” IEEE Trans. Power Electron., vol. 11, no. 2, pp. 275-284, Mar. 1996.
[13]J. Ribas, J. M. Alonso, E. L. Corominas, A. J. Calleja and M. Rico-Secades, “Design considerations for optimum ignition and dimming of fluorescent lamps using a resonant inverter operating open loop,” IEEE IAS, pp. 2068-2075, 1998.
[14]S. W. Lee, D. Y. Ko, D. Y. Huh and Y. I . Yoo, “Simplified control technique for LCD backlight inverter system using the mixed dimming method,” IEEE APEC’01, pp. 447-453, 2001.
[15]G. C. Hsieh and C. H. Lin, “Harmonized strategy for breaking the striations in the fluorescent lamp,” IEEE Trans. Ind. Electron., vol. 48, no. 2, pp. 352-366, April 2001.
[16]G. H. Kweon, Y. C. Lim and S. H. Yang, “An analysis of the backlight inverter by topologies,” IEEE Int’l Symp. Ind. Electron., pp. 896-900, 2001.
[17]C. J. Kom, J. G. Ji and S. Y. Yoon, “A study on the design and performance of electronic ballast for CCFL dimming control with frequency modulation,” IEEE ICEMS 2003, vol. 1, pp.453-456, Nov. 2003.
[18]C. Y. Liu, F. Teng, C. Hu and Z. Zhang, “LCLC resonant converter for multiple lamp operation ballast,” IEEE APEC’03, vol. 2, pp. 1209-1213, Feb. 2003.
[19]S. B. Yaakov and M. M. Peretz, “Modeling and behavioral SPICE simulation of a self adjusting current-fed push-pull parallel resonant inverters,” IEEE PESC’04, pp.61-67, 2004.
[20]C. H. Lin, Y. L. and K. J. Pai, “Digital-dimming controller with current spikes elimination technique for LCD backlight electronic ballast,” IEEE APEC, pp. 153-158, 2004.
[21]C. H. Lin, “The design and implementation of a new digital dimming controller for the backlight resonant inverter,” IEEE Trans. on Power Electron, vol. 20, no. 6, pp. 1459-1466, Nov. 2005.
[22]C. C. Chen, H. S. Nien, C. L. Shen and T. F. Wu, “Design and development of digital control multi-lamp back-light modules for TFT-LCD TV”, IEEE IAS, pp. 2340-2346, 2005.
[23]C. G. Kim, K. C. Lee and B. H. Cho, “Uniform current distribution in driving Cold cathode fluorescent lamps (CCFL) in parallel,” IEEE PESC’05, pp.1087-1093, 2005.
[24]C, G. Kim, K. C. Lee and B. H. Cho, “Driving cold cathode fluorescent lamps in parallel,” Electronic Letters, vol. 41, Issue:4, pp. 1-2, Feb. 2005.
[25]G. C. Hsieh and M. C. Wu, “Soft burst mode dimming control for CCFL inverter,” Proc. LASTED CSS 2006, San Francisco, Nov. 2006.