The present invention provides (A) a plurality of scan lines and a plurality of signal lines arranged in a matrix form; A common signal line extending in parallel with one of the scan line and the signal line to apply a reference potential; Pixel electrodes; And a thin film transistor including a source electrode connected to the pixel electrode, a drain electrode connected to the signal line, and a gate electrode connected to the scan line, the thin film transistor being formed at an intersection portion between the scan line and the signal line. (B) a second substrate comprising a black matrix layer and disposed opposite the first substrate, wherein a liquid crystal layer is sandwiched between the first substrate and the second substrate; And (C) a liquid crystal display device arranged with an insulating layer sandwiched between the pixel electrode of the first substrate and the scanning line. While voltage is applied to the common signal line and the pixel electrode to form an electric field, the direction of the molecular axis of the liquid crystal molecules included in the liquid crystal layer is rotated in a flat plate arranged in parallel with the first substrate to perform liquid crystal display. To; In addition, the pixel electrode of the first substrate covers a portion of the scan line disposed in an area other than an area where the thin film transistor is formed.
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