LED燈部分發光元件失效下仍可使用之驅動與輔助電路設計

基於綠色環保、節能減碳的政策，使用LED將會是時代的趨勢。在本論文中將研製在LED串中有單顆或數顆LED失效時還能繼續動作的電路。一般的LED是以直流電源驅動，如果LED串上有單顆或數顆LED失效時會導致電流無法通過，這將會使整串LED無法動作。本論文並設計及製作一個兩級式電源供應器用以驅動LED。電源供應器的前級為主動式功率因數修正器，後級為半橋LLC諧振切換電源供應器。在本論文的電路設計中，當單顆或數顆LED發生故障時，其它的LED仍可正常的動作，並不需要更換整個LED串，可以降低更換成本。

關鍵字

LED ； LLC諧振切換電源供應器； LED故障

並列摘要

For energy-saving and carbon-reducing, using LEDs for lighting will be the trend of this era. This thesis presents the design of the electric circuit that can still operate while single or multiple LED of a LED string do not work, therefore, reduce the cost of replacement. This thesis also proposes a two-stage AC LED driving circuit. The front-stage is a boost power factor corrector (PFC), and the rear-stage is a half-bridge LLC resonant switching power supply circuit. The circuit has been built and the experiment results show its feasibility.

並列關鍵字

LED fault ； LED ； LLC resonant switching power supply

參考文獻

[22] 劉純漢，具有自動調光功能的LED背光電路設計與研製，私立中原大學電機工程學系碩士論文，民國98年。

[24] 何紹詩，“液晶顯示面板LED背光電路設計與實現”，私立中原大學電機工程研究所碩士論文，中華民國95年。

[2] Z. Ye, Fred Greenfeld, and Zh. Liang, “Design Considerations of a High Power Factor SEPIC Converter for High Brightness White LED Lighting Applications”, Power Electronics Specialists Conference, 2008. PESC 2008. 15-19 June 2008. Page(s): 2657 – 2663.

[3] Y. Hu, and M. M. Jovanovic, “LED Driver with Self-Adaptive Drive Voltage”, Power Electronics, IEEE Transactions on Volume: 23, Issue 6. Dec. 2008. Page(s): 3116 – 3125.

[4] H. Broeck, G. Sauerlander, and M. Wendt, “Power Driver Topologies and Control Schemes for LEDs”, Applied Power Electronics Conference, APEC 2007. Feb. 25 - Mar. 1 2007. Page(s): 1319 – 1325.

國際替代計量

LED燈部分發光元件失效下仍可使用之驅動與輔助電路設計

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