低成本薄膜電晶體液晶顯示器源極驅動晶片之研究

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研究生：	林英廷
論文名稱：	低成本薄膜電晶體液晶顯示器源極驅動晶片之研究 Study on Low-cost TFT-LCD Source Driver ICs
指導教授：	盧志文
口試委員:	陳伯奇周懷樸張慶元
學位類別：	碩士 Master
系所名稱：	原子科學院 - 工程與系統科學系 Department of Engineering and System Science
論文出版年：	2012
畢業學年度：	101
語文別：	英文
論文頁數：	60
中文關鍵詞：	薄膜液晶顯示器、源極驅動器、數位類比轉換器、緩衝器
相關次數：	點閱：3 下載：0
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在這篇論文提出了一種新架構在薄膜液晶顯示器驅動晶片，而此架構專門設計給可攜式之小面板薄膜液晶顯示器。
在這研究提出了一種節省面積的電阻串型態數位類比轉換器，運用於薄膜液晶顯示器驅動晶片。而此驅動晶片包含了正負兩種極性的數位類比轉換器，且提供給五百組的通道使用，所以造成多組通道僅需要一組數位類比轉換器，達到節省面積之功用。
在內文當中，會說明如何利用共用一組數位類比轉換器給五百組通道使用之方法，而在此架構中，我們提出的是一個九位元的解析度在顯示運用上。

Introduction 1
1 Motivation of research . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Purpose of research . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 Thesis outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
The Function of Liquid Crystal Display Driver 3
1 The principle of liquid crystal display . . . . . . . . . . . . . . . . . . . . . 3
1.1 The eect of electronic-light and light polarized principle of liquid
crystal display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Gamma correction . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Inversion method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Introduction of TFT-LCD system . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 The basic architecture of TFT-LCD . . . . . . . . . . . . . . . . . . 6
2.2 The principle of TFT-LCD driver . . . . . . . . . . . . . . . . . . . 7
Liquid Crystal Display Source Driver 9
1 Architecture of source driver . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 The speed of output buer . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Shift register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Inversion controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 Input register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Data latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
II
7 Level shifter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Rail to rail output buer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9 Digital to analog converter . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
10 Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Low Cost Liquid Crystal Display Source Driver 20
1 Motivation of refresh DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2 Proposed refresh DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3 Flow chart of Refresh DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4 Architecture of Refresh DAC . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.1 Data register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2 Level shifter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3 Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.4 Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.5 Refresh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5 Simulation result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.1 Simulation of level shifter . . . . . . . . . . . . . . . . . . . . . . . 39
5.2 Simulation of operational amplier . . . . . . . . . . . . . . . . . . 39
5.3 Simulation of 8-bit source driver . . . . . . . . . . . . . . . . . . . . 43
6 Measurement result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Conclusion 58
                                

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