請用此 Handle URI 來引用此文件：
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/17029完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 蘇國棟(Guo-Dung Su) | |
| dc.contributor.author | Wei-Ting Shih | en |
| dc.contributor.author | 史偉廷 | zh_TW |
| dc.date.accessioned | 2021-06-07T23:53:49Z | - |
| dc.date.copyright | 2013-11-05 | |
| dc.date.issued | 2013 | |
| dc.date.submitted | 2013-10-14 | |
| dc.identifier.citation | [1] Kai Wang, et al., 'Design of compact freeform lens for application specific light-emitting diode packaging,' OPTICS EXPRESS, Vol. 18, No. 2, pp. 413-425, 18 January 2010
[2] Zexin Feng, et al., 'Design of LED freeform optical system for road lighting with high luminance/illuminance ratio,' OPTICS EXPRESS, Vol. 18, No. 21, pp. 22020-22031, 11 October 2010 [3] Chien-Chih Chen, et al., 'Sequential Color LED Backlight Driving System for LCD Panels,' IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol. 22, No. 3, pp. 919-925, May 2007 [4] Hyunsuk Cho, et al., 'A Local Dimming Algorithm for Low Power LCD TVs Using Edge-type LED Backlight,' IEEE Transactions on Consumer Electronics, Vol. 56, No. 4, pp. 2054-2060, November 2010. [5] Gerard Harbers, et al., ' LED backlighting for LCD HDTV,' Journal of the SID, pp. 347-350, 2002. [6] Rong-Seng Chang, et al., 'LED Backlight Module by Lightguide-Diffusive Component,' Journal of Display Technology, Vol. 8, No. 2, pp. 79-86, February 2012. [7] YI Luo, et al., 'Design of compact and smooth free-form optical system with uniform illuminance for LED source,' OPTICS EXPRESS, Vol. 18, No. 9, pp. 9055-9063, 26 April 2010. [8] XIONG Si-si, et al., 'Design of Freeform Surface Lens for LED of Random Light Distribution in Road Lighting,' Proc. of SPIE, Vol. 891315, pp. 891315-1 - 891315-8, 2012. [9] Zheng Zhenrong, et al., 'Freeform surface lens for LED uniform illumination,' APPLIED OPTICS, Vol. 48, No. 35, pp. 6627-6634, December 2009. [10] Liwei Sun, et al., 'Free-form microlens for illumination applications,' Applied optics, Vol. 48, No. 29, pp. 5520-5527, October 2009. [11] H. Ries and A. Rabl, 'Edge-ray principle of nonimaging optics,' Optical Society of America, Vol. 11, No. 4, pp. 1256-1259, April 1994. [12] F. Chen, et al., 'Free-form lenses for high illumination quality light-emitting diode MR16 lamps,' Optical Engineering, vol. 48, pp. 123002-1 - 123002-7, December 2009. [13] Liwei Sun, et al., 'Free-form microlens for illumination applications,' APPLIED OPTICS, Vol. 48, No. 29, pp.5520-5527, October 2009. [14] F. Chen, et al., 'Free-form lenses for high illumination quality light-emitting diode MR 16 lamps,' Optical Engineering, Vol. 48, pp. 123002-1 – 123002-7 , December 2009. [15] B. Parkyn and D. Pelka, 'Free-form illumination lenses designed by a pseudo-rectangular lawnmower algorithm,' Proc. of SPIE, Vol. 6338, pp.633808-1 – 633808-7, 2006 [16] L. Wang, et al., 'Discontinuous free-form lens design for prescribed irradiance,' Applied optics, Vol. 46, pp. 3716-3723, February 2007. [17] M. Bass, et al., Handbook of Optics: Vision and vision optics: McGraw-Hill Professional, 2009 [18] Y. Zhen, et al., 'The optimal design of TIR lens for improving LED illumination uniformity and efficiency,' Proc. SPIE 6834, p. 68342K, 28 November 2007. [19] Cheng Yi Wu, et al., 'Fabrication of microlens array diffuser films with controllable haze distribution by combination of breath figures and replica molding methods,' OPTICS EXPRESS, Vol. 16, No. 24, pp. 19978-19986, November 2008. [20] Zoran. D. Popovic, et al., 'Technique for monolithic fabrication of microlens arrays,' Applied optics, Vol. 27, No. 7, pp. 1281-1284, April 1988. [21] Theresa. R. Jay and Margare. B. Stern, 'Preshaping photoresist for refractive microlens fabrication,' Optical Engineering, Vol. 33, No. 11, pp. 3552-3555, November 1994. [22] D.L. MacFarlane, et al., 'Microjet fabrication of microlens arrays,' IEEE Photonics Technology Letters, Vol. 6, No. 9, pp. 1112-1114, September 1994. [23] JOSEPH MEIRON, et al., 'Damped Least-Squares Method for Automatic Lens Design,' JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, vol. 55, No. 9, pp. 1105-1109, September 1965. [24] Michael J. Kidger, 'Use of the Levenberg-Marquardt (damped leastsquares) optimization method in lens design,' Optical Engineering, vol. 32, No. 8, pp. 1731-1739, August 1993. [25] Po-Hung Yao, et al., 'Polarized backlight with constrained angular divergence for enhancement of light extraction efficiency from wire grid polarizer,' OPTICS EXPRESS, vol. 20, No. 5, pp. 4819-4829, February 2012. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/17029 | - |
| dc.description.abstract | 在這篇論文中, 我們用了分離變數法去得到正方形目標平面的自由曲面與解微分方程法去得到圓形目標平面的自由曲面, 再藉由我們所創建的自由曲面透鏡將LED的光場強度變得更加均勻.
接下來, 我們會用異質微透鏡組合去近似自由曲面透鏡. 我們藉由模擬的結果去調整曲率半徑與大小. 最後, 藉由優化, 我們可以得到均勻的照度分佈. 而其直下式背光元件厚度為2公釐, 此設計可使均勻度與效率個別達到90%與96%以上. 而其可涵蓋的面積為49平方公分 | zh_TW |
| dc.description.abstract | In this paper, variable separation mapping design method and solving differential equation method were adopted to obtain freeform surface for a square target plane and circular target plane, respectively. Starting from the freeform lens constructed by these methods, we would keep the light field intensity uniform.
We then utilized heterogeneous micro lens array (MLA) to approximate the shape of the freeform lens. We adjusted the curvature radius and size by the simulation results. Through optimization process, we could achieve a uniform light intensity of ight emitting diodes using heterogeneous MLA. The thickness of direct-lit backlight unit is 2 mm thick. This design achieved 96% efficiency and 90% uniformity. It covers an area of 49 square centimeters . | en |
| dc.description.provenance | Made available in DSpace on 2021-06-07T23:53:49Z (GMT). No. of bitstreams: 1 ntu-102-R00941102-1.pdf: 2266764 bytes, checksum: caaf71364e5c1f4f774ee5b41d3d661a (MD5) Previous issue date: 2013 | en |
| dc.description.tableofcontents | 誌謝 i
中文摘要 ii ABSTRACT iii CONTENTS iv Chapter 1 Introduction 1 Chapter 2 Freeform Lens 3 2.1 Intensity Distribution of LED Light Source 3 2.2 Principle of Freeform Surface with Circular Target Plane 4 2.2.1 Introduction 4 2.2.2 Normal Vector of Tangent Plane 5 2.2.3 Incident Vector & Refractive Vector 7 2.2.4 Edge Ray Principle 8 2.2.5 Energy Conservation Law 9 2.2.6 Snell’s Law 11 2.2.7 Partial Differential Equation 13 2.2.8 Ordinary Differential Equation 14 2.3 Principle of Freeform Surface with Square Target Plane 15 2.3.1 Introduction 15 2.3.2 Energy Conservation Law 16 2.3.3 Lawnmower Algorithm 18 2.4 Construct Process 21 2.5 Definitions of Efficiency and Uniformity 22 2.6 Simulation Results 23 2.6.1 Circular Target Plane (H=20mm) 23 2.6.2 Square Target Plane (H=20mm) 24 2.6.3 Square Target Plane (H=2mm) 25 2.6.4 Discussion 26 Chapter 3 Transform a Freeform Surface into Heterogeneous Microlenses 29 3.1 Micro Lens Technology 29 3.2 Approximate Process 30 3.3 Algorithm of Optimization - Damped Least Squares Algorithms 32 3.4 Optimization Process 34 3.5 Simulation Results (After Optimization) 35 3.6 Discussion 36 3.7 Compare with Previous Results 39 Chapter 4 Conclusions 42 | |
| dc.language.iso | en | |
| dc.subject | 自由曲面 | zh_TW |
| dc.subject | 異質微透鏡 | zh_TW |
| dc.subject | heterogeneous microlenses | en |
| dc.subject | freeform lens | en |
| dc.title | 異質微透鏡組合在固態照明上的應用 | zh_TW |
| dc.title | Application of heterogeneous microlenses for solid state lighting | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 102-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 陳奕君,吳肇欣 | |
| dc.subject.keyword | 自由曲面,異質微透鏡, | zh_TW |
| dc.subject.keyword | freeform lens,heterogeneous microlenses, | en |
| dc.relation.page | 45 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2013-10-15 | |
| 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 |
| 顯示於系所單位： | 光電工程學研究所 | |
文件中的檔案：
| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| ntu-102-1.pdf 未授權公開取用 | 2.21 MB | Adobe PDF |
系統中的文件，除了特別指名其著作權條款之外，均受到著作權保護，並且保留所有的權利。