An array substrate, comprising: a base substrate; a plurality of first signal lines extending in a first direction, the plurality of first signal lines arranged in second direction different from the first direction and provided on the base substrate; a plurality of repair line sets also provided on the base substrate and configured to repair the plurality of first signal lines wherein each of the repair line sets is arranged with a subset of the plurality of first signal lines and comprises one or more repair lines which intersect with end portions of the first signal lines of the subset and are insulated from all first signal lines of the subset, and each of the repair line sets further comprising a connecting line, the array substrate further comprising one or more second signal lines provided on the base substrate, wherein each second signal line has one end arranged to intersect with a corresponding connecting line of of a repair line set, and is arranged to be insulated from the corresponding connecting line and from the one or more repair lines, and another end is connected to a driving circuit for supplying an electrical signal to the one or more first signal lines, wherein the second signal line is different from any of the first signal lines few, wherein, in a plan view, the connecting line is disposed between the second signal line and the repair line and has one end disposed to overlap with the second signal line and the other end disposed to overlap with, and connected to, a first end of the repair line, wherein one or more intersection locations between the one or more first signal lines and the one or more repair lines as well as one or more intersection locations between the plurality of connecting lines and the one or more repair lines are all arranged outside a display area of the array substrate, the array substrate being characterized in that each of the repair line sets further comprises two spacers disposed in a same layer as the first signal lines, one of the two spacers is arranged at a second end of the repair line and the other one of the two spacers is arranged at the proximity of the first end of the repair line, so as to be aligned with the end portions of the first signal lines of said subset along the second direction, wherein the two spacers intersect with and are insulated from the repair line. a base substrate; a plurality of first signal lines extending in a first direction, the plurality of first signal lines arranged in second direction different from the first direction and provided on the base substrate; a plurality of repair line sets also provided on the base substrate and configured to repair the plurality of first signal lines wherein each of the repair line sets is arranged with a subset of the plurality of first signal lines and comprises one or more repair lines which intersect with end portions of the first signal lines of the subset and are insulated from all first signal lines of the subset, and each of the repair line sets further comprising a connecting line, the array substrate further comprising one or more second signal lines provided on the base substrate, wherein each second signal line has one end arranged to intersect with a corresponding connecting line of of a repair line set, and is arranged to be insulated from the corresponding connecting line and from the one or more repair lines, and another end is connected to a driving circuit for supplying an electrical signal to the one or more first signal lines, wherein the second signal line is different from any of the first signal lines few, wherein, in a plan view, the connecting line is disposed between the second signal line and the repair line and has one end disposed to overlap with the second signal line and the other end disposed to overlap with, and connected to, a first end of the repair line, wherein one or more intersection locations between the one or more first signal lines and the one or more repair lines as well as one or more intersection locations between the plurality of connecting lines and the one or more repair lines are all arranged outside a display area of the array substrate, the array substrate being characterized in that each of the repair line sets further comprises two spacers disposed in a same layer as the first signal lines, one of the two spacers is arranged at a second end of the repair line and the other one of the two spacers is arranged at the proximity of the first end of the repair line, so as to be aligned with the end portions of the first signal lines of said subset along the second direction, wherein the two spacers intersect with and are insulated from the repair line.