高效能固態照明新式電驅動模式之研究

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姓名

陳建宏(Chien-Hong Chen) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

高效能固態照明新式電驅動模式之研究
(Study of Novel Driving Modes with High Performance for LEDs)

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摘要(中)

本研究將LED之驅動結合負回饋控制，並提出兩種LED之驅動模式來改善該光源受熱效應之影響。其一為解決點亮LED時亮度衰退的問題，以電控驅動使光功率能夠維持，其光束維持率高達0.98以上；其二為改善熱效應致LED運作於低效率差的狀態，使用電控驅動穩定p-n接面溫度，其光功率增幅能高達7.5%。新式電控驅動模式能使LED的缺點能夠得到改善，使得原本就高的轉換效率能夠表現更佳，發光行為表現更穩定。

摘要(英)

In this thesis, two innovative driving modes are proposed to improve the thermal effect when turning on LEDs. The traditional driving mode will induce two shortcomings. The first one is the initial state with radiant power drop dramatically, and make the light maintenance is above 0.98. The second one is driving with heat accumulating state which leads to low efficiency, and the enhancement of optical power can up to 7.5%. The innovative driving mode can conquer the obstacle which traditional driving modes have. With the driving mode, the efficiency of LEDs can perform better and the emitting property can be more stable.

關鍵字(中)

★ 電控
★ 固態照明
★ 驅動模式

關鍵字(英)

★ LED

論文目次

摘要 i

Abstract ii

致謝 iii

目錄 iv

圖目錄 vii

表目錄 x

第一章緒論 1

1-1 研究背景 1

1-2 影響LED之因素 3

1-3 LED現有之驅動方式 5

1-4 研究動機 7

第二章 LED驅動原理 9

2-1 LED發光原理 9

2-2 LED發光之影響因素 10

第三章熱電關係量測 13

3-1 熱電關係量測系統 15

3-2 順向電壓與接面溫度 19

3-3 光功率模型之建立 22

3-4 光功率之等值曲線 24

第四章等光功率驅動模式 26

4-1 驅動模式原理 26

4-1-1 控制原理 27

4-1-2 等光功率驅動原理 28

4-2 特性整合量測系統 31

4-2-1 實驗架構 31

4-2-2 實驗條件與流程 36

4-3 實驗結果與分析 37

4-3-1 實驗數據 37

4-3-2 光束維持率 42

第五章高效率驅動模式 45

5-1 可調變控制原理 45

5-1-1 接面溫度控制原理 47

5-1-2 高效率驅動原理 48

5-2 接面溫度與驅動電流之變化關係 51

5-2-1 接面溫度隨時間變化關係 51

5-2-2 電流與溫度變化關係 54

5-2-3 驅動電流與接面溫度 57

5-2-4 熱時變參數與文獻比較 59

5-3 實驗條件與流程 62

5-4 實驗結果與分析 64

5-4-1 實驗數據 64

5-4-2 收斂範圍與分析 68

5-4-3 光譜參數之函數擬合法 70

5-4-4 參數關係分析及探討 72

5-5 其他類型LED 74

5-5-1 綠光LED 74

5-5-2 紅光LED 75

5-5-3 琥珀LED 76

5-5-4 白光LED：色溫6500K 77

5-5-5 白光LED：色溫3000K 78

第六章結論 80

參考文獻 82

中英文名詞對照表 89

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指導教授

孫慶成(Ching-Cherng Sun)

審核日期

2015-8-26

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