臺灣博碩士論文加值系統

本論文探討主題為六邊形側光式LED平板燈的最佳化出光設計，主要為設計光學底板的結構，因其影響了光線群的出光效益以及出光表面均勻度，利用田口式實驗計劃法，將各參數分別設定為信號因子、控制因子、干擾因子...等，再建立田口式直交表，並進行實驗分析計劃帶入ASAP光學模擬軟體(Advanced Systems Analysis Program)以蒙地卡羅追跡法模擬光線群在模型腔體的多次光學模擬，加以分析光學底板在腔體內光學反應特性之數據，以建立光學底板實體。
利用控制因子的參數以及其所建立的水準我們設計了一直交表，將其帶入ASAP光學模擬軟體(Advanced Systems Analysis Program)以蒙地卡羅追跡法模擬光線群在模型腔體的多次光學模擬，然後進行實驗設計(DOE)，由實驗數據分析得到六邊形側光式LED平板燈其出光效率為90%，出光表面均勻度為85%而與模擬之誤差為3%的出光效率與8%均勻度。
對於目前所製作燈具，均勻性的表現不比一般具導光平板燈佳，但出光效率卻遠高於有導光板的平板燈，在往後的工作中除了以最佳出光效率為主要目標更要以提高均勻度為次要取向。

Differ from its counterpartLED light panel with light guide plate, a polygonal edge-type LED light panel with hollow cavity exhibits additional merits, such as high light extraction efficiency, raw material conservation, diversified modeling, etc. However, its optimal design is a complex engineering problem. To resolve this issue, we studied the interactions between two main design parameterscontrol factors: both the lengths of corner-to-corner of the flat-top surface and bottom surface and the height of the central pyramid reflection structure of the bottom reflector and the thickness of the hollow-cavity in the design of a large-sized hexagonal edge-type LED light panel with hollow cavity by Taguchi method. As for other design parameters, such as the positions of the narrow-beam LED light-bars disposed along the side edges of the hollow cavity, the height and width of LED lamp reflector, and the transmission and haze of the diffusion plate on top of the hollow cavity, the implemented voltage and current, etc., were designed as adjustment factors, and signal factors, respectively.
By the control factors and their corresponding levels, a mixed-level orthogonal array was constructed. ASAP optical simulations were then introduced to perform the design of experiments (DOE) according to experiment assignments in the orthogonal array. Optimal design parameters of the central pyramid reflection structure of the bottom reflector and the height of the hollow cavity were achieved. Then a high-performance prototype of a large-sized hexagonal edge-type LED light panel with hollow cavity was constructed according to the obtained optimal design parameters. The light extraction efficiency is of 90% and the emission surface illuminance uniformity is of 85%. Its performance was highly agreed with the simulations with errors less than 3% and 8% in terms of light extraction efficiency and emission surface illuminance uniformity, respectively.
We concluded the light extraction efficiency of a polygonal edge-type LED light panel with hollow cavity was better-performed traditional edge-type LED light panel with light-guide plate and it is even competitive with the best direct-type LED light panel products. The future work can focus on the improvement of illuminance uniformity.

摘要 iv
ABSTRACT v
致謝 vi
目次 vii
圖目錄 ix
表目錄 xi
第一章緒論 1
1.1 LED照明產業概況 1
1.2 LED 照明技術 3
1.2.1 LED 燈具介紹 4
1.2.1.1側光式（Edge lighting） 5
1.2.1.2直下式（Bottom lighting） 5
1.3背景介紹 7
1.3.1設計理念 7
1.3.1競爭優勢 8
1.4文獻回顧 9
1.5研究動機與目的 13
1.6預期目標 13
1.7論文架構 13
第二章基礎理論 15
2.1基礎光學理論 15
2.1.1反射(Reflection) 16
2.1.2 折射(Refraction) 17
2.1.3 全反射(Totally internal reflection) 18
2.1.4菲涅耳方程式(Fresnel equations) 19
2.1.5 吸收(Absorption) 20
2.1.6 表面散射(Surface scatter) 21
2.2基礎光度計量學 22
2.2.1光通亮（Luminous flux：Φ） 22
2.2.2照度（Llluminance：E） 22
2.2.3發光強度（Luminous intensity：I） 23
2.2.4輝度（Luminance：L） 25
2.3照明模組光學檢測 26
第三章田口式方法 27
3.1前言 27
3.2田口方法步驟 27
3.2.1田口簡介 27
3.2.2決定因子及水準 28
3.2.3直交表的選擇 30
3.2.4 田口方法步驟 31
3.3最佳化設計參數 32
3.3.1最佳化參數條件 32
3.3.2 直交表參數選用 32
3.3.2.1 六角錐型光學底板因子與水準設定 34
3.3.2.2 平坦型光學底板因子與水準設定 36
第四章模擬設計 39
4.1光學模擬軟體ASAP 39
4.2設計流程圖 40
4.3 ASAP建構模型與參數設定 42
4.4實驗中的誤差 43
4.4.1空腔模擬圖與實體架構圖 43
4.4.1米散射與BSDF 45
4.5田口法實驗驗證 48
4.5.1六角錐型光學底板實驗 48
4.5.2 平坦型光學底板實驗 52
4.5.2.1 平坦型光學底板實驗數據2cm 52
4.5.2.2 平坦型光學底板實驗數據2.5cm 56
4.5.2.3平坦型光學底板實驗數據3cm 60
第五章實體設計 39
5.1使用之硬體參數 64
5.1.1反射片(Reflector) 66
5.1.2擴散板(Diffuser) 68
第六章結果與討論與未來工作 74
6.1 誤差分析 74
6.2 結果與討論 76
參考文獻 78

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