半圓形入光微結構對背光模組光學之影響研究

Study on the Semicircle Shape Micro-Structure of Light Guide Plate to the Optical Performance of Back Light Units

陳偉柏(Wei-Po Chen)

指導教授 ： 陳夏宗

中原大學/工學院/機械工程研究所/碩士(2011年)

https://doi.org/10.6840/CYCU.2011.00072

摘要

在液晶顯示器中其光源是來自於背光模組，背光模組中的導光板更是控制輝度與均一性的重點，其中導光板微結構更為主要控制整個光源分佈的關鍵，而入光微結構更關係到背光模組的外觀品味，故如何利用光學模擬軟體規納出入光微結構最佳設計準則，則可有效縮短整個開發時程與費用，進而增加產業的競爭力。
　　本研究最主要是利用光學模擬軟體Specter來建構背光模組，並對其入光微結構之參數:微結構R、微結構夾角、微結構深度，來做一系列的搭配與研究，並由模擬來研究其背光模組入光側均一性因入光微結構參數的變異而產生的結果分析與討論，而我們更會實際開模並射出導光板組成模組來驗證差異驗證。
　　在整個研究結果顯示，相對於無入光微結構的導光板，採用微結構的導光板其整體均一性可提升40%左右，而平均輝度的部份則有15%的提升，入光微結構越密則越有散光效果，當微結構間距越大時則可增加LED中心軸的輝度，所以適當的入光微結構角度與間距可以提升背光模組的輝度與均一性及品味表現，以上的研究也可當做後續開發人員參考。

關鍵字

微結構 ； 導光板 ； 液晶顯示器 ； 背光模組

並列摘要

In the liquid-crystal display, the light-guide plate (LGP) is a very important component in backlight module and controls the brightness and the uniformity. The light micro-feature (MF) is related to the appearance of the light-guide plate. In this research, how to find out the best design of the light micro-feature by using the optical simulation software is a crucial factor. With the aid of best design guidelines, process can be effectively shortened and saves money in development, thus increases the competitiveness of industry.
The main purpose of the study is the use of optical simulation software “Specter to construct the backlight module. And do a series of collocation and research with parameters of incoming MF, including MF-R, angle of MF, and depth of MF. By the simulation to study the entering light side uniformity of the backlight module and then analyze and discuss the result which is caused by the difference of the parameters of incoming MF. Then, we will make a new sample and a new module made of LGP to verify the differences.
By the results of the research, it is related to the LGP with no light micro-feature, using the micro-feature of the LGP increase about 40% of the overall uniformity and 15% in average luminance. The more incoming MF concentrates, the more effective astigmatism has. When the spacing of MF becomes larger, the luminance of central axis raise in LED. Consequently, applicable angle and spacing in MF can raise the luminance, uniformity, and savor performance for backlight module. The investigation provides a guideline to research and designer in design of LGP’s micro-feature.

並列關鍵字

LCD ； Light guide plate ； Back light module ； Micro-feature

參考文獻

5. 蔣宗樹，”導光板導光設計之研究”，中原大學碩士論文(2003)

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9. 蘇莉琪，”具雙面微結構設計之導光板之光學性質之研究”，中原大學機械工程系碩士論文(2006)

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參考文獻