臺灣博碩士論文加值系統

有機電激發光二極體顯示器具有體積薄、視角廣、重量輕、反應速度快、高亮度、高對比度等優點，被公認為具有次世代的薄型顯示器之明星產品。
目前有機電激發光二極體的發展方向，除了低階的被動式產品之外，更值得去研究發展的是主動式全彩化的中大型面板，朝向更大尺寸、更高解析度、更高亮度、更高對比度、更細緻的畫質、更低功率消耗等目標去研究。其中要實現大型化面板和高解析度畫質，這些問題的關鍵和驅動電路的設計與實現有相當大的關係。
本論文藉由說明OLED面板搭配LTPS-TFT的技術來實現主動式面板，但是因為LTPS-TFT製程的關係，使得LTPS-TFT會產生特性變異的問題，這將會影響到OLED面板的不均勻性，使得面板畫質大受影響。因此，有相當多的改善補償電路相繼被提出發表，然而，這些方式有些並不能解決所有的問題，如：臨界電壓的變異、電子遷移率的變異、IR-Drop的問題、在小電流時充電時間過長的問題等。所以，本篇論文提出一種新型的電流型畫素電路，稱之為『非對稱電壓之電流鏡畫素驅動電路設計』。此種設計能夠解決上述四項問題，使得大型化、高解析度的主動式有機電激發光二極體顯示器變得不再遙不可及。

As a result of the potential for slim profile, wide viewing angle, light weight, fast response, high brightness, and high contrast ratio, OLED display panel promise to be an attractive solution for next-generation flat panel displays.
Recently, the developing direction of OLED, besides passive form products in the low steps, it is active and full-color medium-and-large-sized panel that is more worth studying development , orientation large size , high resolution , high brightness , high contrast ratio , careful picture quality,, low power consumption ,etc. goal study. Among them should realize the large size panel and high resolution, the keys of these questions and the design of the drive circuit, with realize having sizable relations high.
This thesis is by proving that the technology of using LTPS-TFT of OLED panel realizes the active panel , but LTPS-TFT process by ELA, enable LTPS-TFT to produce the mutant problem of the characteristic, this will influence the uniformity of OLED panel, making the panel draw the quality influences big. So, there are many compensating rules which were reported, but, some of these ways can not solve all problems, for instance: The variation of the threshold voltage, the variation of the mobility, IR-Drop, and the charging time problem etc. So this thesis propose one new current type pixel circuit, call that "Asymmetrical-Vdd Current Mirror Pixel Circuit ". The design can solve above-mentioned four problems and make the large size and high resolution for AM-OLED displays more easily.

第一章 有機電激發光二極體顯示器簡介--------------------------1
1.1 前言------------------------------------------------------1
1.2 應用領域--------------------------------------------------1
1.3 市場概況--------------------------------------------------8
1.4 研究發展方向----------------------------------------------11
第二章 有機電激發光二極體顯示器之光電轉換系統----------------14
2.1 有機電激發光二極體顯示器之基本構造------------------------14
2.2 發光原理--------------------------------------------------15
2.3 全彩化方式------------------------------------------------19
2.4 OLED的面板結構--------------------------------------------21
第三章 有機電激發光二極體顯示器畫素驅動電路架構---------------23
3.1 前言------------------------------------------------------23
3.2 被動式有機電激發光二極體顯示器畫素驅動電路----------------24
3.3 主動式有機電激發光二極體顯示器畫素驅動電路----------------27
3.3.1 影響面板不均勻性的因素------------------------------29
3.3.1.1 元件變異：臨界電壓與電子遷移率--------------30
3.3.1.2 IR-Drop-------------------------------------30
3.3.2 改善面板不均勻性的方式------------------------------31
第四章 電壓型畫素驅動電路-------------------------------------32
4.1傳統型2T1C畫素電路-----------------------------------------32
4.1.1 2T1C畫素電路的動作原理------------------------------32
4.1.2 2T1C畫素驅動電路的模擬結果--------------------------33
4.1.3 2T1C畫素驅動電路的設計要領--------------------------37
4.2 Sarnoff公司所提出4T2C畫素驅動電路-------------------------38
4.2.1 4T2C畫素驅動電路的動作原理--------------------------38
4.2.2 4T2C畫素驅動電路的模擬結果--------------------------41
4.2.3 4T2C畫素驅動電路的設計要領--------------------------43
4.3韓國Seoul National University之4T1C畫素電路----------------44
4.3.1 4T1C畫素驅動電路的動作原理--------------------------44
4.3.2 4T1C畫素驅動電路的模擬結果--------------------------48
4.3.3 4T1C畫素驅動電路的設計要領--------------------------48
第五章 電流型畫素驅動電路-------------------------------------50
5.1電流複製（Current Copy）驅動方式---------------------------51
5.1.1 4T1C電流複製畫素電路的動作原理----------------------51
5.1.2 4T1C電流複製畫素電路的模擬結果----------------------54
5.1.3 4T1C電流複製畫素電路的設計要領----------------------58
5.2電流鏡（Current Mirror）驅動方式---------------------------59
5.2.1 4T1C畫素電路的動作原理------------------------------59
5.2.2 4T1C畫素電路的模擬結果------------------------------62
5.2.3 4T1C畫素電路的設計要領------------------------------68
5.3 負載電容充電時--------------------------------------------69
5.3.1 Current Copy 畫素電路的充電時間---------------------69
5.3.2 Current Mirror畫素電路的充電時間--------------------73
5.3.3 充電時間問題的結論----------------------------------77
第六章 新型畫素驅動電路---------------------------------------79
6.1 新型畫素驅動電路架構--------------------------------------79
6.2 新型畫素驅動電路的動作原理--------------------------------79
6.3 新型畫素驅動電路的模擬結果--------------------------------81
6.4 新型畫素驅動電路的設計要領--------------------------------87
第七章 總結---------------------------------------------------89

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