Display device

A display device comprising:

• a base substrate in which a display region configured to display an image and a frame region around the display region are defined;
• a light-emitting element provided on a first surface of the base substrate, and configuring the display region;
• a plurality of display wiring lines provided in the display region between the base substrate and the light-emitting element;
• a plurality of lead-out wiring lines provided in the frame region between the base substrate and the light-emitting element and electrically connected to the plurality of display wiring lines, respectively, and
• a short ring TFT disposed between a pair of adjacent lead-out wiring lines of the plurality of lead-out wiring lines,
• wherein the short ring TFT includes a semiconductor layer including a channel region, and a source region and a drain region disposed sandwiching the channel region, a first gate electrode provided closer to the base substrate than the semiconductor layer and overlapping the channel region, a second gate electrode provided closer to the light-emitting element than the semiconductor layer and overlapping the channel region, a first gate insulating film provided between the semiconductor layer and the first gate electrode, and a second gate insulating film provided between the semiconductor layer and the second gate electrode,
• one of the pair of adjacent lead-out wiring lines is electrically connected to the source region,
• the other of the pair of adjacent lead-out wiring lines is electrically connected to the drain region,
• one of the first gate electrode and the second gate electrode is a short circuit gate electrode electrically connected to the source region or the drain region, and
• the other of the first gate electrode and the second gate electrode is a threshold value control gate electrode electrically connected to a threshold value control wiring line provided in the frame region.