臺灣博碩士論文加值系統

自從1906年第一顆發光二極體(Light Emitting Diode, LED)被發明出來，經過了90年的發展，直到日本的日亞化學(Nichia)在1996年發表高亮度的藍光和白光LED技術，LED才被視為俱有潛力成為新一代的照明光源。然而，LED是窄頻的光源，和傳統的廣頻譜光源相比，在許多特性上有很大的差異。其中最大的差異，在於頻譜的變動特性，傳統的燈源，最多只具有調整亮度的功能，無法在頻譜特性上做調整。而LED卻能夠藉由不同的組合，在某些情況下達到相同的效果，這在色彩學上稱為同色異譜(Metamerism)的概念。

因而此研究的主題，主要由以往照明頻譜的特性參數上著手，嘗試建立一個軟體平台，用來挑選適當的LED組合，以得到最佳的混光頻譜。接著實際建構一個多波段LED的混光系統，並希望能夠將模擬與實際系統的結果成功的連結起來。

Ninety years after the first LED was invested in 1906, Nichia developed high intensity blue and white light LEDs in 1996. Only until then are LEDs thought to be the lighting sources of next generation. However, unlike the general lighting sources, LEDs have very narrow band-width spectrum. Thus, LEDs have the flexibility on synthesizing different spectra with the same properties, which is called “Metamerism” in color science.

This thesis focused on the combinations of LEDs to fulfill the general lighting parameters. We first developed a MatLab based GUI simulation tool to calculate the optimized LED spectrum. We then designed and fabricated a LED matrix to verify the simulation results, and expected to synchronize the practical LED clusters with the program.

Abstract (Chinese) i
Abstract (English) ii
Acknowledgement iii
Table of Contents iv
Figure Captions vi

Chapter 1 Introductions 1
1.1 Introduction of the LED 1
1.1.1 Emergence of the LED 1
1.1.2 Lighting Properties of the LED 3
1.2 Introductions of the Thesis 7
1.2.1 Motivations and Objections 7
1.2.2 Relative Researches about Spectra Optimization 8
1.2.3 Organization of the Thesis 11


Chapter 2 Fundations in Lighting 12
2.1 Vision 12
2.1.1 Human Visual System 12
2.1.2 Radiometry and Photometry 15
2.1.3 Color Vision Theory 17
2.2 Fundamental Color Science 21
2.2.1 CIE Color System 21
2.2.2 Correlated Color Temperature 25
2.2.3 Color Rendereing Index 26
Chapter 3 Simulations 33
3.1 Introduction of the Simulation 33
3.2 Simulation Setups 35
3.2.1 Simulation of Basic Parameters 35
3.2.2 Modification of the Mixing Ratio 37
3.3 Simulation Results 41


Chapter 4 Experiments 46
4.1 Design of LED Matrix 46
4.2 Measurement Results 52
4.3 Discussions and Modifications 58


Chapter 5 Conclusions and Future work 64


Reference 67

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