高功率LED光電熱色特性整合模型之研究

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姓名

紀詔元(Chao-yuan Chi) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

高功率LED光電熱色特性整合模型之研究
(Study of modeling on Optical-Thermal-Electric-Chromatic Characteristics for High-power LEDs)

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摘要(中)

近年來，高功率固態照明光源技術不斷地演進，加上封裝製程與螢光粉材料等技術也持續地發展並日趨成熟，發光二極體(Light-emitting Diode, LED)的發光效率逐漸提升，由2006年的50 lm/W提升至2009年約250 lm/W。在未來的應用及發展應是屬於照明市場，LED正漸漸取代傳統光源。
由於發光二極體有許多的優點，像是節能減碳、低成本、發光效率高、體積小、壽命長和較純的光譜等優點，進而衍生出各種應用的照明光源產品，例如交通號誌燈、電式、手機被光源、路燈等等。然而，發光二極體的發光特性會隨著接面溫度而改變，例如發光強度的衰減、發光顏色的飄移和閃爍不定等，其原因歸因於驅動電流的調整、以及發光二極體內部接面溫度的變化。
本論文將探討發光二極體的輻射光譜、驅動電流和接面溫度三項物理特性，建立出光電熱色整合的輻射光譜模型。輻射光譜代表發光二極體的光、色特性，完全地相依於驅動電流、與接面溫度的變化，此輻射光譜模型將適用於任何封裝形式的發光二極體。

摘要(英)

In the past few years, the package technology of light-emitting diodes (LEDs) has been of much more progress. The optical efficiency of LEDs is increased dramatically from 50 lm/W in 2006 to 250 lm/W in 2009. In the short future, LEDs has been penetrating to the general lighting market, especially replacing the traditional bulbs.
As of lots of advantages, such as energy saving, low cost, high luminous, long life time and pure spectrum, LEDs have been applied for many widespread range of applications. For example, traffic signals, LCD, TVs, mobile phones, general lighting and so on. However, the characteristic of the emission light will greatly vary as the junction temperature and the driving electric current change.
In this thesis, one model is proposed for intergrating the chromatic, thermal, optical, and electric characteristics. When monitoring the forward voltage under any certain electric current driven, the junction temperature can be evaluated in high accuracy. After obtaining the electric current and the junction temperature of LED in operation, the emission spectrum is also well predicted according to the proposed integration model.

關鍵字(中)

★ 發光二極體
★ 輻射光譜

關鍵字(英)

★ spectrum
★ light-emitting diode

論文目次

第一章序論 1
1-1 研究背景 1
1-2 研究動機 5
第二章 LED光電熱色特性原理 6
2-1 電熱特性 6
2-2 光色特性 8
2-3 色差評估 9
第三章量測系統 12
3-1 實驗架構一 12
3-2 實驗架構二 15
第四章實驗結果與分析 17
4-1 藍光LXHL-LR5C 17
4-1-1順向電壓量測結果及建立Tj 17
4-1-2 發光光譜的量測與模型建立 18
4-1-3 發光光譜參數 24
4-1-4 模型準確度分析 24
4-2 綠光LXHL-LM5C 27
4-2-1順向電壓量測結果及建立Tj 27
4-2-2 發光光譜的量測與模型建立 28
4-2-3 發光光譜參數 32
4-2-4 模型準確度分析 33
4-3 藍光XREROY 36
4-3-1 順向電壓量測結果及建立Tj 36
4-3-2 發光光譜的量測與模型建立 37
4-3-3 發光光譜參數 41
4-3-4 模型準確度分析 42
4-4 綠光XREGRN 45
4-4-1順向電壓量測結果及建立Tj 45
4-4-2 發光光譜的量測與模型建立 46
4-4-3 發光光譜參數 50
4-4-4 模型準確度分析 51
4-5 琥珀光XRCAMB 53
4-5-1順向電壓量測結果及建立Tj 53
4-5-2 發光光譜的量測與模型建立 55
4-5-3 發光光譜參數 59
4-5-4 模型準確度分析 60
4-6 紅光XRCRED 62
4-6-1順向電壓量測結果及建立Tj 62
4-6-2 發光光譜的量測與模型建立 63
4-6-3 發光光譜參數 67
4-6-4 模型準確度分析 68
4-7 討論 71
第五章結論 78
參考文獻 79

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指導教授

楊宗勳(Tsung-Hsun Yang)

審核日期

2012-7-27

推文