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研究生:魏霖杰
研究生(外文):Lin-Chieh Wei
論文名稱:分析殘餘直流電造成畫面閃爍的影響
論文名稱(外文):Analysis of TN-LCD image-sticking and flicker Caused by Internal Direct Current
指導教授:貢中元貢中元引用關係
學位類別:碩士
校院名稱:國立中興大學
系所名稱:電機工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:76
中文關鍵詞:閃爍殘影配向膜液晶顯示器
外文關鍵詞:flickerimage-stickingpolyimideLCD
相關次數:
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液晶盒物理特性是影響液晶顯示器品質的主要因素,隨著低電壓驅動以及高速應答液晶顯示器元件的開發,而使得液晶盒中的配向膜材料搭配日顯重要。然而液晶與配向膜材料本身亦含有雜質離子的存在,造成配向膜內部殘餘直流電壓的增加而影響液晶盒的光電特性,而且在液晶盒製程中譬如配向膜材料塗佈及定向過程中往往會有雜質離子產生,影響液晶顯示器的顯示品質。
本論文中討論殘餘直流電壓對於液晶盒物理特性的影響,實驗方法是使用TN型正介電係數液晶材料搭配三家廠商提供的四種不同配向膜所產生的離子效應來做研究,包括:1. 殘餘直流電壓(Residual DC)量測,2. 殘影點燈測試,3. 畫素補償電壓時變。了解四種不同的配向膜釋放離子電荷的能力,觀察內部殘餘直流電壓對於液晶盒光學輸出特性的變化。在本實驗中我們首創補償電壓時變量測,我們在不同時間中分別量測補償電壓偏移情形,目的是觀察內部殘餘直流電壓的多寡是否會影響畫素補償電壓(Vgc)偏移情形。

Electro-optical properties are always the major factor of LCD quality and follow the development of low voltage drives and high response liquid crystal to make liquid crystal arrange in pairs PI material more importance. And then LCD arranges in pairs PI material consists impurities an ion existence to make the internal residual DC of PI material increase and to influence the physics material of LC cell and the quality of LCD.
This thesis uses TN type positive liquid crystal material to arrange in pairs three firms to offer an ion effect produced by four different PI to research and measure, includes: 1. Residual DC measure, 2. Residual image light a lamp test, 3.pixel voltage time dependent. Measure thesis is to add DC numerical (Bipolar DC Stress Method) in LCD box sample to understand the power of four different PI release an ion electric charge and observe the change of internal residual DC effects LCD box optics output character. And from optics measure to make sure the PI internal will produce residual DC to become the scrambled image when we add DC to LCD box sample. From the part of residual DC analyze residual image light a lamp test, we will know the power of PI release an ion become lower and the residual image becomes more serious. And from make reparation voltage time dependent character, we can know: except for process change character will effect making reparation voltage center leaning and besides also effect the amount of internal residual DC

目錄
摘要........................................................i
Abstract...................................................ii
誌謝.......................................................iv
目錄........................................................v
圖目錄...................................................viii
表目錄.....................................................xi
第一章
諸論...................................................1
1.1簡介................................................1
1.2 配向膜簡介.........................................2
1.3 離子電荷效應.......................................5
1.4 電荷捕捉機制.......................................8
1.4.1 電雙極性模型.....................................8
1.4.2 基本原理說明....................................10
1.4.3 離子電荷在液晶層中的運動行為....................11
1.4.4 離子電荷在配向膜的運動行為......................12
1.5 液晶顯示器的畫素設計..............................14
1.5.1 設計考慮........................................14
1.5.2電容效應.........................................15
1.6 論文研究重點及目的................................17
第二章 實驗方法.......................................19
2.1 樣本製作..........................................19
2.2 實驗裝置..........................................22
2.2.1 殘餘直流電壓量測................................22
2.2.2 殘影點燈測試....................................25
2.3 實驗量測說明......................................28
第三章 實驗結果討論及分析.............................31
3.1 殘餘直流電壓的量測................................31
3.2 液晶顯示器點燈殘影的量測.........................36
3.3 畫素電壓時變的表現................................39
3.3.1 補償電壓Vgc時變量測方法.........................40
第四章 結論...........................................54
第五章 參考文獻....................................56
附錄 配向膜參數.......................................61

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