臺灣博碩士論文加值系統

隨著TFT LCD在市場上越來越普遍，不良問題成為業界很重要的課題，畫面閃爍為主要不良問題其中之一。
針對畫面閃爍改善，業界人士提出很多相關研究，有從液晶方面、TFT 內部的 Alignment layers、畫素的架構、或者驅動….等，改善方法很多種，但是目前尚未有一套有效的系統可以克服此問題。
本文研究及探討的方向，從畫面閃爍現象(Flicker)產生，如何藉由液晶顯示器驅動晶片內部的Vcom電壓調整，來改善畫面閃爍的現象。另外，在生產過程中，每片液晶顯示面板都必須經由人眼檢測後，再進行燒錄的動作，此過程浪費釵h人力及時間，研究探討經由自動光學檢測系統(AOI)，來取代人工目視檢測作業，減少人工成本與維持產品品質的理想目標。
本文研究的目的，開發一套成本低廉、操作容易的LCD Flicker自動光學檢測系統(AOI)，它可以判斷畫面閃爍大小，並且調整LCD Common電壓設定，找出每片LCD閃爍到最輕微時的Common電壓設定值，將數值透過系統燒錄至LCD的OTP記憶體中，此數值為該液晶顯示器出廠後的開機初始值，可以將每片LCD的畫面閃爍現象降到最低。
本文實驗部份，以人工目視檢測畫面閃爍現象的最佳化(最低)，與自動檢測系統AOI(Automatic Optical Inspection)檢測畫面閃爍最佳化，兩者作比較，而經由實驗之後，將有效的實驗結果在本文中表達出來，冀望能從本研究中的各項探討與實驗結果，能夠對於其他有志研究與了解的業界的先進們，提供一些個人之卓見。

As TFT LCDs get more and more popular in the market, reduced rejection rate become a major thrust in the industry. Image flicker is one of the main issues.
In view of the image flicker issue improvement, the industry provided many related research to improve it, For example, LCD aspect, alignment layers, structure of pixel, driving method, and so on. Many methods were used to improve image flicker; however, there is yet an active system successfully overcome the issue.
This thesis studies and discusses the issue of LCD display flicker. To further improve image flicker issue by adjusting internal Vcom voltage of the LCD driver IC. In addition, over using Manpower and time is considered since each LCD panel must be checked by human eyes before burning production process. The studies have probed the automatic optical inspection system (AOI) to replace human eyes to check each LCD panel. AOI system will improve the detecting precision; and further, it will also reduce the labor cost and keep the quality of products.
The purpose of this thesis studies is to develop a user-friendly operating interface and reduce cost. LCD Flicker automatic optical inspection system (AOI) detects the range of Image flicker and adjust voltage setting of LCD Common, it will look for the voltage setting of LCD Common when LCD flickers slightly. At the same time, the value will burn into OTP memory of LCD by AOI system. The setting is the default value of LCD panel could make the phenomenon of image flicker of LCD to minimum.
As the experimental part of this thesis studies, two ways of optimization were compared. Comparing optimization checked by human eyes, and the optimization of LCD Flicker checked by AOI. Which way better inspected image flicker? It will be discussed more in the thesis. Thus, it interests me to study this subject, and also I would like to present some my personal idea to the people who is interested in the same project reference.

中文摘要 i
Abstract iii
致 謝 v
目 錄 vi
圖目錄 ix
表目錄 xii
第一章 、緒論 1
1.1前言 1
1.2研究背景與動機 1
1.3論文架構 5
第二章 、液晶顯示器驅動理論與閃爍產生原因探討 6
2.1 TFT LCD基本架構 6
2.1.1 TFT LCD關鍵零組件 7
2.1.2 TFT LCD製作流程 10
2.1.3 TFT LCD的等效電路 13
2.1.4 TFT LCD液晶顯示器驅動電路 15
2.2 TFT LCD顯示原理 17
2.2.1 偏光板(Polarizer)的弁鉬〝 18
2.2.2 TFT-LCD的Common電極驅動方式 19
2.3 FLICKER產生的原因 20
2.3.1 面板的各種極性變換方式 22
第三章 、系統選擇與操作說明 26
3.1 操作說明 26
3.1.1 CCD攝影機系統 27
3.1.2 AOI影像擷取卡 33
3.1.3傅立葉轉換 35
3.1.4影像處理系統之軟體介面 38
3.2液晶顯示模組外部驅動電路核心 40
3.2.1 AT91及1356控制系統的設計 41
3.3 OTP自動燒錄控制系統 43
3.3.1 Vcom自動調階判定燒錄 48
第四章 、實驗結果與討論 55
4.1 AOI Flicker量測之結果 55
4.2 人員以目視檢測之結果 58
4.3 TFT 液晶面板閃爍其它解決方法 59
4.3.1改變畫素陣列極性反轉的方式 59
4.3.2改變TFT元件的設計結構 60
第五章 、結論 62
5.1 產品品質之改善 64
5.2 對未來之發展 65
參考文獻 66

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