Display device and method that prevent foreign substance generation at a dam wall resulting in higher quality of display for manufacturing same

The display device comprising:

• a base substrate;
• a thin-film transistor (TFT) layer provided on the base substrate;
• a light-emitting element provided on the TFT layer;
• a sealing film provided to cover the light-emitting element;
• a display region for displaying an image by light emission of the light-emitting element;
• and
• a frame region positioned around the display region, wherein
• the frame region is provided with a dam wall surrounding the display region, and the sealing film includes an organic layer provided on an inner side of the dam wall,
• the display region is provided in a variant shape including a variant portion, an outer peripheral shape of the variant portion being different from a rectangular shape,
• a protruding portion having a height equal to or greater than a height of the dam wall is provided at a position facing the variant portion in the display region through the dam wall on an outer side of the dam wall in the frame region,
• the frame region is provided in a frame shape having a plurality of sides,
• a terminal portion is provided at one side of the frame region,
• an intermediate portion on one side positioned on a side opposite to the terminal portion in the display region constitutes a notch portion as the variant portion provided in a bent recessed shape on an inner side of the display region when seen in a plan view, and a contour of corner portions equivalent to two end portions of the one side constitutes a rounded corner portion as the variant portion provided in a curved shape, and
• the protruding portion is provided continuously at locations facing both the notch portion and the rounded corner portion.

A method of manufacturing a display device, the method comprising:

• a thin-film transistor (TFT) layer forming step of forming a TFT layer on a base substrate;
• a light-emitting element forming step of forming a light-emitting element on the TFT layer;
• a sealing film forming step of forming a sealing film including an organic layer to cover the light-emitting element;
• a division step of forming the TFT layer, the light-emitting element, and the sealing film in each of a plurality of panel constituent regions of a mother substrate using the mother substrate including the panel constituent regions constituting a display panel as the base substrate, and dividing the mother substrate in units of the display panels after the sealing film forming step,
• wherein a dam wall surrounding a display region is formed in a frame region positioned around the display region for displaying an image by light emission of the light-emitting element before the sealing film forming step,
• spreading of an organic resin material forming the organic layer outside the frame region is dammed back by the dam wall in the sealing film forming step,
• the display region is provided in a variant shape including a variant portion, an outer peripheral shape of the variant portion being different from a rectangular shape,
• a protruding portion having a height equal to or greater than a height of the dam wall is formed at a position facing the variant portion in the display region through the dam wall on an outer side of the dam wall in the frame region after the TFT layer forming step, and
• the protruding portion is formed on an outer side of a division line dividing the protruding portion in units of the display panels of the mother substrate in the division step.