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博碩士論文 etd-0114110-151739 詳細資訊
Title page for etd-0114110-151739
論文名稱
Title
14吋LCD背光模組內LED減量使用之研究
A Study on Reducing LED Amount Used in 14 Inches LCD Back Light Module
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
69
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2010-01-06
繳交日期
Date of Submission
2010-01-14
關鍵字
Keywords
導光板、背光模組、發光二極體、微結構、光學模擬
backlight module, optical simulation, light guide plate, LED, microstructure
統計
Statistics
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中文摘要
本研究利用Light Tools 光學模擬軟體,進行以發光二極體(LED)為光源之背光模組導光功能之改善設計,以期能減少LED使用量導光板設計改善重點包括:於下表面以凹狀微半球透鏡結構均勻排列,取代V-Cut 型導光板下結構;於上表面加入微半球透鏡結構取代擴散膜之功能再導入側邊微結構設計,消除導光板光源入射邊之暗區現象。
模擬之進行是以上、下微結構之尺寸與分布間距及LED光源數量為參數,利用統計學的L18直交表進行模擬,將模擬結果中均勻度最佳一組參數,再配合不同之側微結構型態與分佈進行模擬,最後得到一組可改善導光板光功能,令LED使用數量降低的參數。
結果顯示整體背光模組在未使用擴散膜之情況下均勻度便可達88.6%,超越原始樣本搭配兩張擴散膜後均勻度須達85%以上之需求,減少擴散膜之成本, 且暗區現象明顯消除;另外,LED使用之數量,亦從原本48顆之用量減少至45顆,若以單純計算各LED之用電量,約節省7%的功率消耗,同時達到節省能源與成本之雙重利基。
Abstract
In this study, the optical simulation software Light Tools was executed to reduce the LED amount used by improving the performance of light guide plate of backlight module with LED illuminator. The improvement of the design including: 1.replacing the V-cut microstructures on the lower layer of the light guide plate by the micro-semispherical lens structures;2.replacing the diffusion film by the micro-semispherical lens structures on the upper layer of the light guide plate ; 3.adding the lateral microstructure on the light guide plate to reduce the dark-area phenomenon.
The sizes of upper/lower microstructures, their spacings and the amount of LED were selected as the parameters and applying L18 orthogonal array to process the simulations firstly. Then integrating different kind of lateral microstructures to find the best uniformity, and obtain a set of parameters that could improve the performance of backlight module and then the amount of LED can be reduced.
The results show that the uniformity of backlight module is over 88% without diffusion film which have overcome the requirement of 85% in traditional design with 2 diffusion films. This improvement not only reduces the cost from diffusion film, also removes the dark-area phenomenon. Additionally, the amount of LED is reduced to 45 from 48 that retrench about 7% of power. Energy and cost are saved simultaneously.
目次 Table of Contents
目 錄
目 錄 I
表目錄 III
圖目錄 IV
摘 要 VII
Abstract VIII
第一章 緒論 1
1.1 前言 1
1.2 研究動機與目的 4
1.3 文獻探討 6
1.4 研究方法與步驟 8
1.5 章節提要 13
第二章 光學模擬設定 21
2.1 背光模組參數設定 21
2.2 導光板上、下微結構設計 22
2.3 側邊式微結構設計 24
2.4 均勻度計算方式 25
第三章 結果與討論 30
3.1 改變導光板下微結構尺寸對背光模組效能之影響 30
3.2 改變導光板上微結構尺寸對背光模組效能之影響 30
3.3 改變導光板側微結構尺寸對背光模組效能之影響 31
3.4 導光板上下微結構組合模擬結果 31
第四章 結論與未來展望 55
4.1 結論 55
4.2 未來展望 56
參 考 文 獻 57
參考文獻 References
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