A liquid crystal display in which image quality is enhanced by reducing coupling noise with adjacent wiring or element and noise entering therefrom, and redundancy is imparted even when short circuit of wiring takes place in a pixel and a defect can be treated as if it is not a defect. Display pixels are provided, respectively, at the intersections of a plurality of vertical signal lines (15) and a plurality of horizontal signal lines (17), each of the vertical signal lines (15) and the horizontal signal lines (17) is provided with a shield wire (3) and the potential of the shield wire (3) is set at such a level as to display the display pixel in black.