液晶顯示器之擴散板的製備及性能研究

High optical transmission efficiency diffuser for liquid crystal display

章興國(Chang Hsin-Kuo)

指導教授 ： 黃振球 博士

元智大學/工程學院/化學工程與材料科學學系/碩士(2002年)

摘要

摘要
液晶顯示器(Liquid Crystal Display；LCD)中的背光模組一般包含光源(冷陰極管)、反射板、導光板、擴散板，以及集光板等部份，其中擴散板的功能乃是為提供液晶顯示器一個均勻的面光源。本研究將針對擴散板的製程及性能進行研究，主要研究內容為利用光硬化型樹脂為主體，先對其透光度、硬化速度及硬化條件做實驗以找出適合的樹脂配方，再將具有不同折射率的微粒子摻入光硬化型樹脂中，待樹脂摻合完成後以施膜器和塗佈機將該樹脂摻合物塗佈在PET片上，再用紫外線曝光機進行曝光使薄膜硬化成型；利用改變光硬化型樹脂中微粒子的種類、添加量、粒徑大小或分佈，最後以光學檢驗設備量測薄膜的光擴散效能作為評估。

關鍵字

液晶顯示器 ； 擴散板 ； 光硬化型樹脂 ； 背光模組 ； 微粒子

並列摘要

Abstract
The use of liquid crystal display（LCD）in flat panel displays is rapidly growing around the world. Liquid crystal display are attractive, because they are lightweight, thin and compact. In principle they use liquid crystal cell plate, they need backlight, polarisers and diffuser. The present paper relates to a backlight module, and more particularly to a diffuser for use of backlight module, which is enhanced for a better luminance and uniform light.
We have studied the light transmission efficiency and the light uniformity by light detector. In this case we use the UV-curable resin and the organic (or inorganic) particle to form the diffuser film. And we will discuss the effect by the different kind of the particle, and the different particle size. In the initial stage conclusion, we find the particle size is the most important property.

並列關鍵字

liquid crystal display ； diffuser ； UV-curable resin ； backlight module ； particle ； LCD

參考文獻

(1.) Munisamy Anandan, Douglas Ketchum,〝Electron Devices, Volume: 39 Issue: 6, pp.1327 —1330〞, June 1992.

(2.) SEMI Standard FPD Technology Group,〝COLOR TFT LIQUID CRYSTAL DISPLAYS, pp. 268-276〞, SEMI, 1995.

(7.) J.-P. Fouassier, 〝Photoinitiation Photopolymerization and Photocuring〞, Hanser, 1995.

(9.) C. G. Roffey, 〝Photopolymerization of surface coatings〞, Wiley,

(16.) Francis Weston Sears,〝Principles of Physics Series Optics〞, 1986.