Display device including repaired defective pixels

A display device, comprising:

• a display panel including a display area configured to display an image and a non-display area surrounding the display area;
• a plurality of active pixels formed in the display area extending in first and second directions crossing each other as a matrix;
• a plurality of dummy pixels formed in the non-display area and extending in the second direction;
• a repair test line formed in the non-display area and extending in the first direction, wherein the repair test line is directly connected to the dummy pixels and not the active pixels;
• one or more active pixel test lines formed in the non-display area and extending in the first direction, wherein the active pixel test lines are electrically connected to the active pixels;
• a plurality of scan lines electrically connected to the active pixels and the dummy pixels and extending in the first direction;
• a plurality of data lines electrically connected to the active pixels and extending in the second direction;
• at least one dummy data line electrically connected to the dummy pixels and extending in the second direction;
• a plurality of repair lines electrically connected to the dummy pixels and extending in the first direction, wherein at least one of the dummy pixels is electrically connected to at least one of the active pixels via at least one of the repair lines;
• and
• a plurality of switches including a plurality of first switches configured to electrically connect the dummy data line to the repair test line and a plurality of second switches configured to electrically connect each of the data lines to one of the active pixel test lines.