本論文提出一發光二極體(Light Emitting Diode, LED)驅動電路，可直接替換傳統以交流矽控整流器(Triode for Alternating Current, TRIAC)調光之白熾燈。驅動電路搭配既有之TRIAC調光器，採雙脈波寬度調變(Double Pulse-Width Modulation, DPWM)或類比電流控制。驅動電路以返馳式轉換器為基礎，加入輔助開關作為同步開關，並搭配輔助電感，使主輔兩主動開關均能零電壓切換，降低功率開關元件切換損失，提高電源轉換效率。
本文分析電路操作階段，推導參數設計方程式，實際設計電路，驅動一50 W由45顆高亮度白光LED串聯而成之LED燈，驗證電路功能，並比較兩種調光方式對於白光LED光輸出特性與電路轉換效率。實驗結果顯示，兩種調光方式的最小調光範圍由觸發角30度至130度；在額定輸出時，此驅動電路採兩種調光方式之電路效率皆可達95 %，但調降輸出亮度時，雙脈波寬度調光之電路效率則高於類比調光。另一方面，白光LED以類比調光的色偏移量較雙脈波寬度調光嚴重，卻有較高的發光效率。

An efficient Light Emitting Diode (LED) lamp driver circuit is proposed for retrofitting the conventionally used incandescent lamps with existing TRIAC dimmer. The dimming feature in a wide range of firing angle from 30° to 130° can be accomplished by means of double pulse-width modulation (DPWM) and analog current regulation. The LED lamp driver adopts a flyback converter with an auxiliary active power MOSFET for synchronous switch and an associated inductor for zero voltage switching (ZVS), leading to lower switching loss and thus achieving a higher circuit efficiency.
In the thesis, the mode operation of the driver circuit is analyzed and the design equations are derived accordingly. A laboratory circuit is designed for an 50 W LED lamp which is composed of 45 high-brightness white LEDs in series. Experiments are carried out to test the circuit performances with two dimming schemes. The experimental results indicate that the driver can achieve a circuit efficiency of 95 % at the rated output. When the LED lamp is dimmed, the circuit efficiency with DPWM is higher than that with the analog current regulation. On the other hand, the LED lamp dimmed by analog current regulation has a higher efficiency but a less color shift by DPWM.

中文摘要 i
英文摘要 ii
目錄 iii
圖目錄 v
表目錄 vii
第一章 緒論 1
1-1 研究背景與動機 1
1-2 論文大綱 3
第二章 白光LED介紹與TRIAC調光電路特性 4
2-1 白光LED 4
2-2 LED驅動電路 8
2-3 TRIAC調光特性 10
第三章 電路架構分析 13
3-1 電路架構 13
3-2 電路工作階段與參數推導 15
3-3 TRIAC調光機制 25
3-3-1 雙脈波寬度調光 25
3-3-2 類比調光 26
3-4 設計步驟 29
第四章 驅動電路設計與量測分析 31
4-1 參數設計 31
4-2 電腦模擬 33
4-3 電路波形量測 35
4-4 TRIAC調光時波形量測 37
4-4-1 雙脈波寬度調光 37
4-4-2 類比調光 40
4-5 電路效率 44
4-6 光特性量測 44
第五章 結論與未來研究方向 49
5-1 結論 49
5-2 未來研究方向 50
參考文獻 51

[1] 王文伯、蕭弘清、宋福生、郭華生、李思昀、宋平生、羅欽煌，照明系統Q&A節能技術手冊，財團法人台灣綠色生產力基金會，2008年。
[2] 張英彬、柯聖浩，電子安定器之實作技術，新文京開發出版股份有限公司，2006年。
[3] Y. Zhang and L. Nie, “The Situation and Prospect of LED Lighting Using in Building Illumination Design,” in International Conference on Mechanic Automation and Control Engineering, MACE, pp. 3700-3701, Jul. 2011.
[4] R. Guan, D. Tian, and X. Wang, “Design and Implementation of LED Daylight Lamp Lighting System,” in International Conference on Electronic Packaging Technology & High Density Packaging, ICEPT-HDP, pp. 1-3, Jul. 2008.
[5] K. R. Cowan and T. U. Daim, “Understanding Adoption of Energy Efficiency Technologies: Applying Behavioral Theories of Technology Acceptance & Use to Understand the Case of LED Lighting for Commercial, Residential, and Industrial End-Users,” in Proceedings of Technology Management in the Energy Smart World, PICMET, pp. 1-9, Aug. 2011.
[6] D. Gacio, J. Cardesin, E. L. Corominas, J. M. Alonso, M. Dalla-Costa, and A. J. Calleja, “Comparison Among Power LEDs for Automotive Lighting Applications,” in Industry Applications Society Annual Meeting, IAS, pp. 1-5, Oct. 2008.
[7] H. J. Chiu and S. J. Cheng, “LED Backlight Driving System for Large-Scale LCD Panels,” IEEE Transactions on Industrial Electronics, vol. 54, no. 5, pp. 2751-2760, Oct. 2007.
[8] S. J. Park, S. M. Kim, and C. S. Won, “Design Considerations for Pico-Projector Based on LCoS and 3-LEDs,” in International Conference on Consumer Electronics, ICCE, pp. 805-806, Jan. 2011.
[9] On Semiconductor, Solar Powered LED Street Lighting, 2007.
[10] Cree Website, http://www.cree.com
[11] W. H. Chi, T. L. Chou, C. N. Han, S. Y. Yang, and K. N. Chiang, “Analysis of Thermal and Luminous Performance of MR-16 LED Lighting Module,” IEEE Transactions on Components and Packaging Technologies, vol. 33, no. 4, pp. 713-721, Dec. 2010.
[12] K. Wang, S. Liu, X. Luo, Z. Liu, and F. Chen, “Optical Analysis of A 3W Light-Emitting Diode (LED) MR16 Lamp,” in International Conference on Electronic Packaging Technology & High Density Packaging, ICEPT-HDP, pp. 1-5, Jul. 2008.
[13] X. Luo, W. Xiong, T. Cheng, and S. Liu, “Design and Optimization of Horizontally-located Plate Fin Heat Sink for High Power LED Street Lamps,” in Electronic Components and Technology Conference, ECTC, pp. 854-859, May 2009.
[14] R. F. Guan, D. L. Tian, X. Wang, and W. Q. Zhao, “Thermal, Mechanical and Optical Analysis of SiC-based LED,” in Electronics Packaging Technology Conference, EPTC, pp. 939-944, Dec. 2008.
[15] T. F. Wu, Y. D. Chang, C. H. Chang, and J. G. Yang, “Soft-Switching Boost Converter With a Flyback Snubber for High Power Applications,” IEEE Transactions on Power Electronics, vol. 27, no. 3, pp. 1108-1119, Mar. 2012.
[16] H. L. Do, “Nonisolated Bidirectional Zero-Voltage-Switching DC–DC Converter,” IEEE Transactions on Power Electronics, vol. 26, no. 9, pp. 2563-2569, Sep. 2011.
[17] W. Y. Choi, J. M. Kwon, J. J. Lee, H. Y. Jang, and B. H. Kwon, “Single-Stage Soft-Switching Converter With Boost Type of Active Clamp for Wide Input Voltage Ranges,” IEEE Transactions on Power Electronics, vol. 24, no. 3, pp. 730-741, Mar. 2009.
[18] C. S. Moo, Y. J. Chen, H. L. Cheng, and Y. C. Hsieh, “Twin-Buck Converter with Zero-Voltage Transition,” IEEE Transactions on Industrial Electronics, vol. 58, no. 6, pp. 2366-2371, Jun. 2011.
[19] R. J. Wai, C. Y. Lin, J. J. Liaw, and Y. R. Chang, “Newly Designed ZVS Multi-Input Converter,” IEEE Transactions on Industrial Electronics, vol. 58, no. 2, pp. 555-566, Feb. 2011.
[20] D. Rand, B. Lehman, and A. Shteynberg, “Issues, Models and Solutions for Triac Modulated Phase Dimming of LED Lamps,” in Power Electronics Specialists Conference, PESC, pp. 1398-1404, Jun. 2007.
[21] A. Wilkins, J. Veitch, and B. Lehman, “LED Lighting Flicker and Potential Health Concerns: IEEE standard PAR1789 update,” in Energy Conversion Congress and Exposition, ECCE, pp. 171-178, Sep. 2010.
[22] L. H. Xu, H. L. Zeng, J. M. Zhang, and Z. M. Qian, “A Primary Side Controlled WLED Driver Compatible with Triac Dimmer,” in Applied Power Electronics Conference and Exposition, APEC, pp. 699-704, Mar. 2011.
[23] J. Smith, J. Speakes, and M. H. Rashid, “An Overview of the Modern Light Dimmer: Design, Operation, and Application,” in Power Symposium, pp. 299-303, Oct. 2005.
[24] National Semiconductor, “Dimming LED Replacement Lamp with TRIAC Phase Control Dimmers,” 2011.
[25] 楊淑慧、金微華、陳重亨，LED投資新趨勢，財信，2008年。
[26] 廖啟男，“三原色發光二極體操作特性研究”，國立中山大學電機工程學系碩士論文，2007年。
[27] 郭浩中、賴芳儀、郭守義，LED原理與應用，五南出版社，2012年。
[28] Philips LumiLEDs Lighting Website, http://www.lumileds.com
[29] K. Scott, “From Concept to Reality to the Future,” Education Presentation for the IESNA Great Lakes Region, 2004.
[30] N. Narendran and Y. Gu, “Life of LED-Based White Light Sources,” Journal of Display Technology, vol. 1, no. 1, pp. 167-171, Sep. 2005.
[31] M. Day, “LED Driver Considerations,” Texas Instruments Inc., 2004.
[32] S. Winder, “Power Supplies for LED Driving,” Education Presentation for the Elsevier Inc., 2008.
[33] 周志敏、周紀海、紀愛華，LED驅動電路設計與應用，五南出版社，2008年。
[34] 吳宗樺，“三原色發光二極體背光源之驅動電路”，國立中山大學電機工程學系碩士論文，2007年。
[35] 張勻豪，“可驅動多盞LED燈之串聯諧振換流電路”，國立中山大學電機工程學系碩士論文，2010年。
[36] 楊雯晴，“高效率可調光白光LED燈驅動電路”，國立中山大學電機工程學系碩士論文，2011年。
[37] H. Ma, W. Yu, C. Zheng, J. S. Lai, Q. Feng, and B. Y. Chen, “A Universal-Input High-Power-Factor PFC Pre-regulator without Electrolytic Capacitor for PWM Dimming LED Lighting Application,” in Energy Conversion Congress and Exposition, ECCE, pp. 2288-2295, Sep. 2011.
[38] Y. C. Chuang, Y. L. Ke, H. S. Chuang, and C. C. Hu, “Single-Stage Power-Factor-Correction Circuit with Flyback Converter to Drive LEDs for Lighting Applications,” in Industry Applications Society Annual Meeting, IAS, pp. 1-9, Oct. 2010.
[39] Z. M. Ye, F. Greenfeld, and Z. X. Liang, “Offline SEPIC Converter to Drive the High Brightness White LED for Lighting Applications,” in Annual Conference of IEEE Industrial Electronics, IECON, pp. 1994-2000, Nov. 2008.
[40] J. Y. Lu and X. B. Wu, “A Novel Multiple Modes PWM Controller for LEDs,” in IEEE International Symposium on Circuits and Systems, ISCAS, pp. 1767-1770, May 2009.
[41] P. Narra and D. S. Zinger, “An Effective LED Dimming Approach,” in Annual Conference of IEEE Industry Applications, IAS, vol. 4, pp. 2232-2238, Oct. 2004.
[42] X. R. Xu and X. B. Wu, “High Dimming Ratio LED Driver with Fast Transient Boost Converter,” in Power Electronics Specialists Conference, PESC, pp. 4192-4195, Jun. 2008.
[43] C. C. Chen, C. Y. Wu, Y. M. Chen, and T. F. Wu, “Sequential Color LED Backlight Driving System for LCD Panels,” IEEE Transactions on Power Electronics, vol. 22, no. 3, pp. 939-925, May 2007.
[44] 古忠平、吳文隆、林士凱、郭玉萍、李麗玲，“照明節能技術現況與發展”，節約能源論文發表會，2004年。
[45] Application note, “75W SSL1750 TRIAC Dimmable Mains LED Driver,” NXP Semiconductor, 2008.