Mini LED 之直下式背光之設計

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姓名

謝沛樹(Pei-Shu Hsieh) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

Mini LED 之直下式背光之設計
(Mini LED Direct Backlight Design)

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至系統瀏覽論文 (2027-6-26以後開放)

摘要(中)

本論文旨在透過二次光學設計開發大角度折射式透鏡，並將其應用於直下式背光模組中，以在限定混光距離內設計出能疊加後達到光型均勻的效果，從而實現降低商業成本的目標。
由於所設計的折射式透鏡會使LED光源產生大角度折射，且LED封裝中的黃色螢光粉與藍色晶片的尺寸有所差異，因此在構建光源模型時，需要分別對黃光和藍光以中場擬合法進行建模和驗證，以解決實驗中遇到的黃暈問題。在黃光模型中，我們使用權重因子來建立光源模型，並進行驗證。通過二次光學設計，我們設計了三款不同的透鏡，並製作樣品進行實驗。
我們修正了第一款透鏡疊加後重疊部分造成的不均勻現象，並在第二款透鏡的實驗中發現黃光和藍光在折射率上的差異會導致模擬與實驗的差距，因此需要以不同的折射率進行模擬。最終，我們設計出了第三款透鏡，成功解決了前述問題。

摘要(英)

This paper aims to develop a wide-angle refractive lens through secondary optical design and apply it to direct-lit backlight modules. The goal is to achieve uniform light distribution within a limited Optical Distance, thereby reducing commercial costs. Due to the significant refractive angles and differences in the sizes of yellow phosphor and blue chip in LED packages, separate modeling for yellow and blue light in mid-field region is required to address the yellow halo issue. A weighting factor is used for the yellow light model to establish and verify the source model.
Three different lenses were designed and sampled for experiments. The first lens was corrected for overlap-induced non-uniformity. In the second lens, refractive index differences between yellow and blue light caused discrepancies between simulation and experiment, requiring simulations with varying refractive indices. The final design of the third lens successfully resolved the issues encountered.

關鍵字(中)

★ 直下式背光模組
★ 混光距離
★ 中場擬合法
★ 權重因子
★ 光源模型

關鍵字(英)

★ Direct-Lit Backlight Module
★ Optical Distance
★ midfield region
★ Weighting Factor
★ Light Source Model

論文目次

摘要 I
Abstract II
致謝 III
目錄 IV
圖目錄 VI
第一章緒論 1
1-1 LED固態照明簡介 1
1-2 背光模組 2
1-3背光模組類別 4
1-4 研究動機 7
1-5 論文大綱 8
第二章研究理論 9
2-1 幾何光學 9
2-2 光度學 17
2-3中場擬合法 24
第三章 LED光源模型 26
3-1以顯微鏡觀察LED 26
3-2 LED量測 29
3-3LED模型建立 32
3-4LED模型驗證 35
第四章直下式背光模組透鏡之二次光學設計 38
4-1 光學設計概念 38
4-2 底部基板效應與黃藍光 40
4-3 Type 1透鏡設計 53
4-4 Type 2透鏡設計與問題 59
4-5 Type 3透鏡設計 79
第五章結論 86
參考文獻 88
中英文名詞對照表 93

參考文獻

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指導教授

孫慶成(Ching-Cherng Sun)

審核日期

2024-8-13

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