Display device having a bent portion

A display device comprising:

• a first substrate having flexibility and including a display area provided with an image display function and a first peripheral area located outside the display area, the first substrate being bent in the first peripheral area;
• a second substrate having flexibility and including an additional function area provided with a function added to the image display function and a second peripheral area located outside the additional function area, the second substrate being bent in the second peripheral area in the same direction as the bending of the first peripheral area;
• a first flat bonding member bonding the first substrate and the second substrate together at the display area and the additional function area, the first flat bonding member including a sealing material provided so as to surround the display area, and a filling material provided in an area surrounded by the sealing material;
• and
• a first bent bonding member bonding the first substrate and the second substrate together at the first peripheral area and the second peripheral area, the first bent bonding member including a bonding interface at which a shear stress occurs due to the bending of the first substrate and the second substrate, wherein
• the first substrate having thin film transistors and display elements,
• the filling material, the sealing material, the first bent bonding member, and an edge of the first substrate are arranged in this order in the first peripheral area, and
• the first bent bonding member has a deformation allowance in a direction of the shear stress greater than that of the first flat bonding member.