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    • 5. 发明授权
    • Liquid crystal display device
    • 液晶显示装置
    • US5303072A
    • 1994-04-12
    • US722550
    • 1991-06-26
    • Mamoru TakedaSadayoshi HottaIchiro YamashitaTatsuhiko TamuraYoneharu Takubo
    • Mamoru TakedaSadayoshi HottaIchiro YamashitaTatsuhiko TamuraYoneharu Takubo
    • G02F1/1362G09G3/36G02F1/133
    • G02F1/13624G09G3/3648G09G3/3659G02F1/136213G09G2300/0809G09G2310/0205G09G2330/08
    • An improved arrangement of a liquid crystal display device is provided in which the redundancy of a known but unwanted TFT (thin film transistor) defect is suppressed so that the yield per finished liquid crystal display device product can be increased without deterioration in the picture quality. Each pixel of the liquid crystal display device arranged at an intersection of one of scanning lines and one of signal lines is provided with two or three TFTs and also, a storage capacitor which is formed of a portion of a gate insulating layer and is sandwiched between its electrode and a preceding scanning line in the previous row using no extra masking procedure. The source, drain and gate electrodes of both the first and third TFTs are respectively coupled to the same signal line, the electrode of the same pixel and the adjacent scanning lines. The gate, source and drain electrodes of the second TFT are respectively coupled to the same scanning line to which the gate electrode of the first TFT is coupled, the electrode of the same pixel and the electrode of a succeeding pixel provided on the opposite side of the scanning line with respect to the same pixel. The arrangement also has a scanning driver circuit capable of activating two scanning lines at the same time for a sequential one-by-one scanning operation, whereby no fault in a reproduced image will be perceived in spite of the presence of a defective TFT.
    • 提供了一种液晶显示装置的改进布置,其中已知但不期望的TFT(薄膜晶体管)缺陷的冗余被抑制,使得可以在不降低图像质量的情况下提高每一个完成的液晶显示装置的产量。 布置在扫描线和信号线之一的交点处的液晶显示装置的每个像素都设置有两个或三个TFT,以及由栅极绝缘层的一部分形成并夹在 其电极和前一行中的前一扫描线不使用额外的屏蔽程序。 第一和第三TFT的源极,漏极和栅极电极分别耦合到相同的信号线,相同像素的电极和相邻的扫描线。 第二TFT的栅极,源极和漏极电极分别耦合到与第一TFT的栅电极耦合的相同的扫描线,相同像素的电极和设置在第二TFT的相反的一侧的后续像素的电极 相对于相同像素的扫描线。 该布置还具有能够同时激活两条扫描线以进行逐次扫描操作的扫描驱动电路,由此即使存在有缺陷的TFT,也不会感觉到再现图像中的故障。