System Development for the CAD/CAE Interface of Optical Design in TFT-LCD Light Guide Plate

液晶顯示器背光模組導光板之電腦輔助光學設計與分析整合介面開發

劉育釧(Yu-Chuan Liu) ； 楊世銘(Shih-Ming Yang)

《工業工程學刊》 25卷6期 (2008/11) Pp. 488-496

https://doi.org/10.29977/JCIIE.200811.0006

摘要

背光模組爲液晶顯示器之發光源，透過導光板的設計，冷陰極燈管之線光源或LED燈之點光源，可被引導爲均勻分布於整體液晶面板之面光源。爲達成分布均勻之光學效果，導光板底部需設計許多具有折射及散射光學效果之微小顆粒結構，在整片導光板上，依其面積大小通常分布數百至上萬個光學顆粒。導光板光學顆粒結構設計所產生之光線均勻度與傳輸效率，僅能透過實際開發模具製作導光板進行確認，或以光跡追蹤軟體進行模擬分析，透過軟體分析雖然可以節省模具開發之費用與時間，但其主要困難在於經由分析結果進行光學顆粒結構之設計變更時，針對數以千計的微小顆粒設計參數逐一進行調整，此爲相當繁瑣且耗時之設計工作。本文針對光學顆粒之設計與光跡追蹤軟體，提出一整合介面設計，常用之光學顆粒設計參數及其二維與三維模型均內建於此整合設計介面中，方便使用者設計；並藉由指定顆粒參數調整之區域及調整量設定，光學顆粒結構設計參數之修改得以迅速完成，設計結果並可自動轉換爲光跡分析軟體之輸入參數格式，透過此設計與分析整合介面，導光板之光學顆粒設計效率可被有效提升。

關鍵字

電腦輔助設計與分析整合 ； 背光模組 ； 系統分析與設計 ； 統一塑模語言

並列摘要

The light guide plate is the key component in a backlight unit of TFT-LCD, where point or line light source(s) is distributed evenly in two dimensional light guide plate. A light guide plate (LGP) has many refraction and/or scattering optical patterns on its bottom surface to transmit the light toward the display panel. The LGP performance can only be predicted by massive optical calculation of geometrical ray-tracing on the optical patterns. The challenge is to design and modify the parameters of thousands of optical patterns to achieve proper uniformity of the emanated light. An integrated design interface to improve the design efficiency is proposed in this paper. The optical pattern properties are all categorized to provide automatic generation of the 2-D and 3-D models of the optical pattern on LGP for ray-tracing analysis. Without this tool, the design process can be minute and complicated.

並列關鍵字

CAD/CAE integration ； Backlight unit ； System analysis and Design ； UML

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