To provide a thin-film transistor array capable of increasing the charging quantity of a liquid crystal panel.

The thin-film transistor array having a plurality of common lines for supplying electrification quantities of pixels is provided. Especially, those common lines each have a plurality of branch parts. The common lines, their branch parts, and pixel electrodes constitute a capacitor. The branch parts are arranged at pixels whose luminance quality is inferior. Consequently, electrified quantities of the pixels can be increased, without varying aperture ratios of the pixels. Thus, the performance of the liquid crystal panel can, therefore, be improved.