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    • 33. 发明授权
    • Liquid crystal display with transparent storage capacitors for holding
electric charges
    • 液晶显示屏,带透明储能电容器,用于保持电荷
    • US5724107A
    • 1998-03-03
    • US534109
    • 1995-09-26
    • Ryuji NishikawaToshio Shimada
    • Ryuji NishikawaToshio Shimada
    • G02F1/1362G02F1/1343G02F1/13G02F1/1333G02F1/1335
    • G02F1/136213
    • A storage capacitor is constituted by a storage capacitor electrode, made of a transparent and conductive film extending substantially all over a substrate, and pixel electrodes overlapping with the storage capacitor electrode via an interlevel insulation layer. The storage capacitor holds charges. The storage capacitor electrode is positioned such that it faces the entire surface of the pixel electrodes. Since the transparent and conductive storage capacitor electrode does not reduce the aperture ratio, the storage capacitor can have a large capacitance. A signal voltage applied to the storage capacitor electrode is determined so as not to activate the thin film transistors which are not selected. A light-shielding layer is present at a position between pixel electrodes on or under the storage capacitor electrode. The light-shielding layer shields the thin film transistors, gate lines and drain lines from incident light, thereby preventing reduction of contrast of displayed pictures. Further, an anti-reflection layer formed by heat treatment is placed on a boundary between the storage capacitor electrode and the light-shielding layer, and is effective in assuring visibility of the picture on the liquid crystal display.
    • 存储电容器由保持电容器电极构成,该电容器电极由基本上遍布基板延伸的透明导电膜和通过层间绝缘层与辅助电容电极重叠的像素电极构成。 存储电容器保持电荷。 存储电容电极被定位成使其面对像素电极的整个表面。 由于透明导电保持电容电极不会降低开口率,因此存储电容器可以具有大的电容。 确定施加到存储电容器电极的信号电压,以便不激活未被选择的薄膜晶体管。 在保持电容电极上或其下的像素电极之间的位置处存在遮光层。 遮光层将薄膜晶体管,栅极线和漏极线遮挡入射光,从而防止显示图像的对比度降低。 此外,通过热处理形成的抗反射层被放置在保持电容电极和遮光层之间的边界上,并且有效地确保了液晶显示器上的图像的可视性。