非對稱式光注入下導光版之光學設計分析與研究

Abstract

本篇論文主要的目的是對液晶螢幕(Liquid Crystal Display;簡稱LCD)背光模組(Backlight Module)中非對稱光注入式導光板(Light-Guide Plate)作分析與研究。導光板的主要目的是使液晶螢幕的光照度能夠分布均勻，而導光板設計的優劣與否，對於LCD畫質亦有很大的影響。而背光模組可因光源配置方式的不同，可分為直下式背光模組以及側光式背光模組，而側光式背光模組的光源配置又可分為光源對稱配置以及光源不對稱配置，在以上不同光源配置的背光模組中，導光板的設計也不盡相同。而在本篇論文中，除了對非對稱光注入式導光板做理論分析外，我們並使用光學軟體Tracepro來作模擬驗證並與實驗結果一併討論。

The major concern of this thesis is to analyze the light distribution on the light-guide plate of backlight module with asymmetrical light sources for a liquid-crystal display(LCD). The major function of the light-guide plate is to make a LCD having good luminance uniformity and the design of light-guide plate directly impacts the performance of image quality of LCD. We can sort the backlight module to two types of direct type backlight module and side-edge backlight module by location of the light sources. There are also two kinds of side-edge backlight module having symmetrical or asymmetrical light sources. Because having difference of the location of light sources, the design of light-guide plate is also different. In this thesis, we will do theoretical analysis of light-guide plate with asymmetrical light sources and run simulation to test and verify our result by optical software , Tracepro. In this thesis, the experimental observation of a commercial product is also included.