Display device including bending portion with frame flattening film and slits

A display device comprising:

• a substrate having flexibility and made of resin,
• a thin film transistor (TFT) layer provided on the substrate,
• a light-emitting element layer provided on the TFT layer,
• a display region configured to display an image through light emission in the light-emitting element layer, and a frame region is located around the display region,
• the TFT layer including an inorganic insulating film, a conductive portion provided on the inorganic insulating film, and a flattening film covering the conductive portion,
• the light-emitting element layer including a first electrode provided on the flattening film, a light emission function layer provided on the first electrode, and a second electrode overlapping the first electrode with the light emission function layer interposed between the second electrode and the first electrode,
• a terminal section provided at an end portion of the frame region,
• a bending portion provided in the frame region located between the display region and the terminal section,
• a slit formed in the inorganic insulating film, a frame flattening film filling the slit,
• a plurality of the conductive portions provided below the first electrode and conductive portions of the plurality of conductive portions adjacent to each other at intervals, and
• a flattening auxiliary film provided between every adjacent conductive portions of the plurality of conductive portions, the flattening auxiliary film formed of a material identical to a material of the frame flattening film in a layer identical to a layer of the frame flattening film, the flattening auxiliary film and the conductive portions covered by the flattening film.