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  1. NTU Theses and Dissertations Repository
  2. 電機資訊學院
  3. 光電工程學研究所
請用此 Handle URI 來引用此文件: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/91394
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dc.contributor.advisor林晃巖zh_TW
dc.contributor.advisorHoang-Yan Linen
dc.contributor.author蔡佑鴻zh_TW
dc.contributor.authorYu-Hung Tsaien
dc.date.accessioned2024-01-26T16:18:41Z-
dc.date.available2024-01-27-
dc.date.copyright2024-01-26-
dc.date.issued2023-
dc.date.submitted2024-01-05-
dc.identifier.citation[1] Tang, C. W., et al., "Organic electroluminescent diodes. " Applied physics letters 51.12 (1987): p. 913-915.
[2] Popovic, Z. D., et al., "Reliability and degradation of small molecule-based organic light-emitting devices (OLEDs)." IEEE Journal of selected topics in quantum electronics 8.2 (2002): p. 362-371.
[3] Hong, G., et al., “A brief history of OLEDs—emitter development and industry milestones.” Advanced Materials, 33.9 (2021): 2005630.
[4] Huang, Y., et al., “Mini-LED, Micro-LED and OLED displays: Present status and future perspectives.” Light: Science & Applications, 9.1 (2020): p. 1-16.
[5] Miao, W. C., et al., “Microdisplays: Mini‐LED, Micro‐OLED, and Micro‐LED.” Advanced Optical Materials, (2023): 2300112.
[6] Wu, T., et al., “Mini-LED and micro-LED: promising candidates for the next generation display technology.” Applied Sciences, 8.9 (2018): 1557.
[7] Bright, T. O., et al., “Efficient blue light-emitting diodes leading to bright and energy-saving white light sources.” Sci. Backgr. Nobel Prize Phys (2014): p. 1-9.
[8] Li, Y., et al., “Highly efficient and ultra‐compact micro‐LED pico‐projector based on a microlens array.” Journal of the Society for Information Display. (2023).
[9] Gou, F., et al., “Angular color shift of micro-LED displays.” Optics express, 27.12 (2019): p. A746-A757.
[10] Hsiang, E. L., et al., “Tailoring the light distribution of micro-LED displays with a compact compound parabolic concentrator and an engineered diffusor.” Optics Express, 29.24, (2021): p. 39859-39873.
[11] Kasap, S. O. “Optoelectronics and Photonics: Principles and Practices 2/e”(2012)
[12] 馬江智. "以阻抗特性量測來分析半導體發光元件之微分載子生命期." 交通大學光電工程學研究所學位論文 (2012)
[13] Sun, Y., et al., "Highly transparent, ultra‐thin flexible, full‐color mini‐LED display with indium–gallium–zinc oxide thin‐film transistor substrate." Journal of the Society for Information Display 28.12 (2020): p. 926-935.
[14] Tian, P., et al., “Size-dependent efficiency and efficiency droop of blue InGaN micro-light emitting diodes.” Applied Physics Letters, 101.23 (2012): 231110
[15] Olivier, F., et al., “Shockley-Read-Hall and Auger non-radiative recombination in GaN based LEDs: A size effect study.” Applied Physics Letters, 111.2 (2017): 22104
[16] 郭令儀. "具有黑矩陣之有機發光二極體的效率提升之研究." 臺灣大學光電工程學研究所學位論文 (2016)
[17] 江正仁. "應用於有機顯示器具高正向亮度且消除模糊效應之微梯形陣列結構膜設計." 臺灣大學光電工程學研究所學位論文 (2012)
[18] Lin, H. Y., et al., “Luminance and image quality analysis of an organic electroluminescent panel with a patterned microlens array attachment.” Journal of Optics, 12.8 (2010): 85502.
[19] 賴皓云. "提升 micro LED 正向輝度與抗反射之二次光學結構設計." 臺灣大學光電工程學研究所學位論文 (2022)
[20] Jensen, H. W., et al. "Monte Carlo ray tracing." ACM SIGGRAPH, 5.44 (2003): 340769537
[21] Metropolis, N., et al., “The monte carlo method.” Journal of the American statistical association, 44.247. (1949): p. 335-341.
[22] 吳思潔. "微透鏡應用於微型發光二極體之研究." 臺灣大學光電工程學研究所學位論文 (2022): p.1-77
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dc.identifier.urihttp://tdr.lib.ntu.edu.tw/jspui/handle/123456789/91394-
dc.description.abstract作為一種新的顯示技術,Micro-LED顯示技術主要基於第三代半導體材料氮化鎵(GaN),其獨特的優勢,如低功耗、高對比、快速響應和高可靠性,已經引起了行業和學術界的廣泛關注。然而隨LED的體積縮小,內部Internal Quantum Efficiency(IQE)降低導致裸晶出光強度降低,以及大角度出光會造成出光不易被人眼接收,因此,如何有效地收集大角度出光並加以利用成為一個值得思考的課題。本文是透過LightTools®進行幾何光學模擬及分析開發出一種具反射杯及黑矩陣之二次光學結構設計,以提升Micro-LED之效率。
透過反射杯及倒梯形結構建構出六角形出光光路為核心思想,將Micro-LED出光的光路及環境光吸收的光路分開,並儘量收斂出光光路。這樣一來,可以降低吸光光路及出光光路的相互影響,並分別加以優化。再者,當出光光路越發收斂,環境光吸光光路就能夠佔據更大的面積,進一步吸收更多環境光以提升面板的對比度。經過二次光學設計之後可以從原先具有40%的出光損耗下降至4.54%,環境光反射從25%下降至4.92%。
zh_TW
dc.description.abstractAs a novel display technology, Micro-LED display technology is primarily based on third-generation semiconductor material, gallium nitride (GaN). Its unique advantages, including low power consumption, high brightness, rapid response, and high reliability, have garnered widespread attention from both industry and academia. However, as LEDs shrink in size, the reduction in Internal Quantum Efficiency (IQE) leads to decreased light emission intensity, and an increase in lateral light emission results in some light being less easily perceived by the human eye. Therefore, effectively collecting and utilizing laterally emitted light becomes an important consideration.
In this paper, we utilize LightTools® for geometric optical simulations and analysis to develop a secondary optical structure with reflector cups and a black matrix. This design addresses the previously mentioned issues of increased lateral light emission and enhances the utilization of Micro-LED light output.
The core concept involves constructing a hexagonal light path by using reflector cups and trapezoidal structures, separating the Micro-LED light path from the light path absorbed by the environment and converging the light paths as much as possible. This approach reduces the mutual interference between the light-absorbing path and the light-emitting path and optimizes them separately. Furthermore, as the light-emitting path converges further, the light-absorbing path for environmental light can occupy a larger area, further enhancing the panel's contrast. After the secondary optical design, the light loss, which was initially at 40%, has been reduced to 4.54%, and environmental light reflection has decreased from 25% to 4.92%.
en
dc.description.provenanceSubmitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-01-26T16:18:41Z
No. of bitstreams: 0
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dc.description.provenanceMade available in DSpace on 2024-01-26T16:18:41Z (GMT). No. of bitstreams: 0en
dc.description.tableofcontents誌謝 i
中文摘要 ii
ABSTRACT iii
目次 iv
圖次 vi
表次 viii
第1章 緒論與研究動機 1
1-1OLED與Micro LED顯示器介紹及比較 1
1.2 Micro-LED之技術現況與挑戰 4
1.3研究動機與本文架構 6
第2章 Micro-LED之發光原理與參數定義 7
2.1 LED之出光原理 7
2.2二次光學結構原理 10
2.3光線追跡(Ray-Tracing) 13
2.4模型定義參數 15
第3章 二次光學結構建置環境 16
3.1 LightTools® 簡介及環境設置 16
3.2模型建立 16
3.2.1出光模型 17
3.2.2環境光模型 18
3.3模擬輸入之條件 19
第4章 二次光學結構設計:參數與效率之關係 20
4.1 Micro-LED出光分析 23
4.2反射杯設計與分析 23
4.3倒梯形設計與分析 26
4.3.1倒梯形角度與效率之關係 26
4.3.2黑矩陣位置改變對效率之影響 29
4.3.3倒梯形高度對效率之影響 30
4.4上黑矩陣之設計與分析 31
4.4.1 倒梯形間隙 31
4.5陣列微結構設計與分析 36
4.5.1陣列錐之設計 36
4.5.2三角柱陣列之設計 37
4.6參數統整及效率展示 39
4.7二次光學設計之模型製程 44
第5章 結論與未來展望 45
5.1結論探討 45
5.2未來展望 47
參考文獻 48
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dc.language.isozh_TW-
dc.title以微陣列結構提升Micro-LED出光效率之低反射二次光學設計zh_TW
dc.titleLow Ambient Light Reflective Secondary Optical Design Enhancing the Light Extraction Efficiency of Micro-LED via Micro Array Structureen
dc.typeThesis-
dc.date.schoolyear112-1-
dc.description.degree碩士-
dc.contributor.oralexamcommittee李君浩;謝嘉定;陳奕均zh_TW
dc.contributor.oralexamcommitteeJiun-Haw Lee;Chia-Ting Hsieh;Yi-Jiun Chenen
dc.subject.keyword黑矩陣,倒梯形,反射杯,出光損失,環境光反射,zh_TW
dc.subject.keywordMicro-LED,LightTools®,Reflector,Secondary Optical Structure Design,en
dc.relation.page49-
dc.identifier.doi10.6342/NTU202304579-
dc.rights.note同意授權(全球公開)-
dc.date.accepted2024-01-08-
dc.contributor.author-college電機資訊學院-
dc.contributor.author-dept光電工程學研究所-
顯示於系所單位:光電工程學研究所

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