| 摘要 |
An object of the invention is to increase the rate of conforming articles by reducing defects due to leakage of supplementary capacitances in an active-matrix liquid crystal display apparatus of a Cs on Com structure having supplementary capacitances. In a normally-white mode active-matrix liquid crystal display apparatus, a plurality of gate signal lines and source signal lines are formed so as to intersect at right angles, pixel capacitors are connected to the intersections through TFTs, and image display is performed. To the pixel capacitors, supplementary capacitances are connected in parallel. Supplementary capacitance lines are driven by a supplementary capacitance drive circuit so that a potential difference not less than a threshold value of the liquid crystal is maintained from common signal lines on a counter electrode substrate. When a leakage occurs at a supplementary capacitance, the potential difference not less than the threshold value of the liquid crystal is maintained at both ends of the pixel capacitor, so that the pixel is prevented from becoming a bright point and the active-matrix liquid crystal display apparatus is prevented from being defective. Consequently, the rate of conforming articles can be increased.
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