江簡富臺灣大學：電機工程學研究所陳純熙Chen, Chun-HsiChun-HsiChen2007-11-262018-07-062007-11-262018-07-062007http://ntur.lib.ntu.edu.tw//handle/246246/53040本論文提出比較兩列次畫素資料的方法，用以快速且精確地對大尺寸或高解析度的液晶螢幕充電。此方法將三條掃瞄線設為一組，藉此重設掃瞄線的開啟時間。另外，考慮兩列次畫素間的差值以及資料線上的延遲，計算出微調期間所需要的電壓。此方法較傳統的充電方法精確。 對於大尺寸或是高解析度的液晶螢幕來說，充電時間是一個設計上嚴苛的參數。本文提出了利用比較前後兩個次畫素資料並提高充電電壓的方法，達到快速充電的目的。此外，本文亦提出了資料線的分段方法，採用放大器以及電阻網路來實現，使資料線上每一個次畫素都被精確地充電。資料線的分段方法亦考慮了掃瞄線的延遲時間。 提出了利用多工器以及選擇器，使多條資料線共用一個DAC以減少資料線驅動電路中DAC的數目。利用此方法可以減少約三分之一的電晶體，因此特別適合使用在高解析度的液晶螢幕上。A fast charging method for large-size or high-resolution liquid crystal display is proposed by comparing data of adjacent rows. The three scan lines are bundled in one set, and their charging time is rearranged so that the percharge phase is long enough. The difference between adjacent two rows and data-line delay are considered to generate the fine-tune voltage by using active charging method. The voltage level can be reached more precisely than conventional methods. Charging time is a critical design parameter for large-size or high-resolution liquid crystal display (LCD). A fast charging method is proposed to generate adaptive charging voltages by comparing the pixel values between previous and current frames. Data line segmentation is also proposed to charge different subpixels on the data line precisely, which is implemented by operational amplifier and resistor network. The scan-line delay is considered in the data-line segmentation. We propose a method to reduce the DAC gate count by sharing one DAC with multiple data lines using multiplexer and switches. The gate count can be reduced to about one third, which is significant, especially for high-resolution TV.Abstract i Table of Contents ii List of Figures iv List of Tables vii Acknowledgment viii 1 Precise Charging Method with Multiple Rows 1 1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Pre-charge Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.1 Scan Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2.2 Data Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3 Segmentation of Data Line . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.4 Design Example and Discussions . . . . . . . . . . . . . . . . . . . . . . . . . 15 1.5 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2 Active and Adaptive Charging Method on Data Lines for Delay Compensation 21 2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.2 Design Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2.3 Design Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 2.4 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 3 Reduction of DAC Gate Count for Data Driver Using Multiplexer 37 3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 3.2 Circuit Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 3.3 Case Studies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 3.4 Conculsion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 461805531 bytesapplication/pdfen-US液晶顯示器驅動電路LCD driverthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/53040/1/ntu-96-J93921008-1.pdf