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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/84648完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林晃巖(Hoang Yan Lin) | |
| dc.contributor.author | Hao Yun Lai | en |
| dc.contributor.author | 賴皓云 | zh_TW |
| dc.date.accessioned | 2023-03-19T22:18:58Z | - |
| dc.date.copyright | 2022-10-12 | |
| dc.date.issued | 2022 | |
| dc.date.submitted | 2022-09-14 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/84648 | - |
| dc.description.abstract | μLED顯示器基於其小體積與高發光強度之發光元件，有潛力成為OLED後的下一代顯示器之發光元件。但在封裝後μLED大角度出光容易在交界面產生全反射，且μLED側向出光無法有效的利用，使光的利用效率大幅降低。本文將針對此問題，利用LightTools®幾何光學模擬軟體進行二次光學設計，解決封裝後μLED正向輝度降低40%之問題。首先在μLED旁加入上方被黑矩陣覆蓋之低折射率介質反射杯降低側向出光，上方搭配高折射率的OCA及低折射率的倒梯形結構將光線偏折到正向，減少大角度出光，提升正向輝度。理想狀態下，此設計最高可提升至少10%之正向輝度。 由於介質反射杯上方有黑矩陣覆蓋，除了可降低側向出光，還可減少至少50%之環境反射光。但實際製作時可能會產生誤差，本文針對μLED製作時可能產生之誤差，如轉置誤差與倒梯形對組誤差進行探討，確認在有誤差的時候依然可提升正向輝度。最後驗證不同視角下是否會有色偏產生，證實二次光學結構之Δu'v'，在不同視角下最大值僅有0.03，人眼不易分辨出差異。 | zh_TW |
| dc.description.abstract | μLED have high potential to become the source of display due to its high luminance and tiny volume. But after packaging, light extraction efficiency will decrease due to side emission and total reflection at glass/air surface. In this paper, we designed a secondary optical system which composed of reflector and inverted trapezoid to decrease luminance loss caused by packaging, and current loss was 40%. The reflector was made from low refractive index material, covered by black matrix, and placed around μLED. Above the μLED was an inverted trapezoid with low refractive index, and it was placed inside OCA with high refractive index. All results were simulated by LightTools®. For ideal case, luminance increased by 10% at least after adding systems. Furthermore, reflector could also decrease reflectance for more than 50% due to black matrixes. Transfer displacement error of μLED and alignment error of inverted trapezoid were also considered. For worst case, luminance could decrease for 15% after packaging, which could be accepted. At last, we checked color difference under different viewing angle. After adding secondary optical system,Δu'v' could be lower than 0.03 under different viewing angle, which was hard to be noticed by human eye. | en |
| dc.description.provenance | Made available in DSpace on 2023-03-19T22:18:58Z (GMT). No. of bitstreams: 1 U0001-1309202212071700.pdf: 3992203 bytes, checksum: 71299e8d30e9ccbe015b9d44addffb89 (MD5) Previous issue date: 2022 | en |
| dc.description.tableofcontents | 誌謝...i 摘要...ii Abstract...iii 目錄...iv 圖目錄...vii 表目錄...xii 一、研究背景介紹...1 1-1 LCD、OLED與Micro LED顯示器介紹及比較..1 1-2 Micro LED顯示器機制與現況...5 1-3 研究動機與本文架構...6 二、模擬計算與標準模型...8 2-1 幾何光學計算...8 2-1-1光線追跡法...8 2-1-2 幾何光學分析...9 2-2 效率指標...10 2-2-1 LEE 與 EQE...10 2-2-2 μLED相對強度與光損...12 2-2-3 反射率...12 2-2-4 色偏...13 2-3 模擬結構與接收器設定...14 2-3-1 出光模型建立...14 2-3-2 反射光模型建立...16 2-4 模擬結果與實驗比較...18 三、倒梯形結構設計及參數與效率之關係...20 3-1 反射杯...20 3-1-1 反射杯參數與效率之關係...20 3-1-2 反射杯光路分析...22 3-2 倒梯形結構...26 3-2-1 倒梯形寬度與效率之關係...26 3-2-2 倒梯形寬度變化之光路分析...29 3-2-3 倒梯形高度變化與效率之關係...33 3-2-4 倒梯形高度h變化之光路分析...34 3-2-5 場型討論...35 3-3 折射率影響...36 3-3-1 倒梯形結構折射率與效率之關係...36 3-3-2 OCA折射率與效率之關係...38 四、反射光與色偏...40 4-1 環境反射光...40 4-2 對組誤差...43 4-2-1 μLED轉置誤差...43 4-2-2 倒梯形結構對組誤差...45 4-2-3 反射杯與倒梯形結構誤差...46 4-3 色偏...49 五、結論與未來展望...52 5-1 結論...52 5-2 未來展望...52 參考文獻...54 | |
| dc.language.iso | zh-TW | |
| dc.subject | 提升正向輝度 | zh_TW |
| dc.subject | 色偏 | zh_TW |
| dc.subject | 抗反射 | zh_TW |
| dc.subject | μLED二次光學結構設計 | zh_TW |
| dc.subject | 反射杯 | zh_TW |
| dc.subject | reflector | en |
| dc.subject | color shift | en |
| dc.subject | anti-reflection | en |
| dc.subject | μLED secondary optical structure design | en |
| dc.subject | normal luminance improvement | en |
| dc.title | 提升micro LED正向輝度與抗反射之二次光學結構設計 | zh_TW |
| dc.title | Secondary optical structure with anti-reflection design to improve micro LED normal luminance | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 110-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 李君浩(Jiun-Haw Lee),陳奕宏(Yi Hong Chen) | |
| dc.subject.keyword | μLED二次光學結構設計,反射杯,提升正向輝度,抗反射,色偏, | zh_TW |
| dc.subject.keyword | μLED secondary optical structure design,reflector,normal luminance improvement,anti-reflection,color shift, | en |
| dc.relation.page | 59 | |
| dc.identifier.doi | 10.6342/NTU202203337 | |
| dc.rights.note | 同意授權(限校園內公開) | |
| dc.date.accepted | 2022-09-15 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 光電工程學研究所 | zh_TW |
| dc.date.embargo-lift | 2027-09-13 | - |
| 顯示於系所單位： | 光電工程學研究所 | |
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