Display device having transmission hole passing through substrate and thin-film encapsulation layer and manufacturing method thereof

A display device comprising:

• a substrate;
• a display unit over the substrate, and comprising a main display area comprising a main pixel, and a sensor area comprising an auxiliary pixel and a transmission portion defining a transmission hole;
• a thin-film encapsulation layer covering the main pixel and the auxiliary pixel of the display unit, and comprising at least one organic layer and at least one inorganic layer that are stacked;
• a component for exchanging a signal through the transmission portion;
• and
• a dam around the transmission hole for blocking the at least one organic layer of the thin-film encapsulation layer from flooding the transmission hole,
• wherein the transmission hole passes through the substrate and the thin-film encapsulation layer.

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

• forming a display unit comprising a main display area and a sensor area over a soft substrate, the main display area comprising a main pixel, and the sensor area comprising an auxiliary pixel and a transmission portion, the forming of the display unit comprising:
• preparing a hard substrate defining an empty space corresponding to a location of the transmission portion;
• forming the soft substrate on the hard substrate;
• forming the main display area and the sensor area on the soft substrate;
• forming a thin-film encapsulation layer covering the main display area and the sensor area;
• and
• forming a transmission hole in the empty space by removing the hard substrate, the transmission hole passing through the soft substrate and the thin-film encapsulation layer;
• and
• arranging a component on one side of the soft substrate, the component for communicating a signal through the transmission portion.