Display device and manufacturing method thereof

A manufacturing method of a display device, comprising:

• (a) providing a display device that has a display region, a signal-sending region, a plurality of data lines, and a plurality of scan lines;
• (b) forming a plurality of selection-line regions, wherein each of the selection-line regions is located at a side of one of the scan lines, such that disposed on two sides of each of the scan lines are respectively one of the selection-line regions and one of a plurality of pixel regions of the display region, wherein each of the selection-line regions has plural selection lines, and the data lines are in one layer different from another layer in which the selection lines are located, and at least one of the selection lines of one of the selection-line regions is electrically connected to one of the data lines through a contact;
• (c) forming a repair line that intersects the selection lines and is between the signal-sending region and the display region and a first welding point that is at an intersection position of one of the selection lines of another selection-line region and the data line on which the contact is located, wherein before the data line on which the contact is located is repaired due to damage, the first welding point is not yet in electrical contact with the data line and the selection line where the intersection position is, and the repair line is not yet electrically connected to the selection line where the intersection position is;
• and
• (d) forming a second welding point at an intersection position of the repair line and the selection line on which the contact is located, wherein before the data line on which the contact is located is repaired due to damage, the second welding point is not yet in electrical contact with the repair line and the selection line on which the contact is located.