- 學位論文
可改善VA型液晶顯示器色偏問題的畫素設計
A New Pixel Design for VA Mode LCD Color Washout Improvement
摘要
近年來液晶顯示器市場被要求提供包括廣視角，高透光率，高對比度和快速響應時間的高光學性能顯示器產品。針對這些需求，相關的技術如垂直陣列（VA）、平面切換（IPS）、邊緣場開關（FFS）的和光學補償彎曲（OCB）的液晶（LC）模式已被應用於顯示器產品；在數種液晶技術中，垂直陣列（VA）製造技術具有較佳的視角和對比度，但傳統的垂直陣列設計在大視角存在嚴重的伽馬曲線離異。為了改善這個問題，包括電容耦合（CC Type）、雙電晶體（TT Type），電荷共享（CS Type）的技術被提出用於改善大視角的伽瑪曲線離異。 本論文提出了雙共通電壓型(DC Type)的垂直陣列顯示器畫素設計，設計出可以應用兩種共通電壓水平的畫素結構，可用於改善垂直陣列型液晶顯示器大視角伽瑪曲線離異，提昇顯示器顯示品質。
並列摘要
Recently, high optical performance including wide view angle, high transmittance, high contrast ratio and fast response time has been requested of LCD markets. For the request, several kinds of liquid crystal (LC) modes such as vertical alignment (VA), in-plane switching (IPS), fringe-field switching (FFS) and optically compensated bend (OCB) have been suggested for LCD product. Compare with those LC technologies, vertical alignment (VA) technology has the wider viewing angles and higher contrast ratio. However, conventional VA design has serious gamma distortions at off-axis angles. To improve these issue of conventional VA design, various advance technologies was proposed including capacitively coupled (CC Type), two transistor (TT Type), and charge shared (CS Type) for LCD panel. These technologies are used for improve gamma distortion at off-axis. This paper introduces a new pixel design to improve the gamma distortion at off-axis, new pixel structure use two kinds of common voltage level.