A display panel comprising: a substrate comprising an opening area, a display area, and a non-display area, the display area surrounding the opening area, and the non-display area being between the opening area and the display area; a plurality of display elements (OLED) at the display area of the substrate, each of the plurality of display elements (OLED) comprising a pixel electrode, an emission layer on the pixel electrode, and an opposite electrode on the emission layer; a thin-film encapsulation layer covering the plurality of display elements (OLED), and comprising a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer; a dam at the non-display area, wherein the dam protrudes from a top surface of a first insulating layer; a recess between the opening area and the dam, wherein the recess is recessed in a depth direction of the first insulating layer; a first functional layer between the pixel electrode and the emission layer; and a second functional layer between the emission layer and the opposite electrode; wherein the first and second functional layers and and the opposite electrode each include a transmission hole exposing a portion of the non-display area between the recess and the opening area; and, wherein a lateral wall (DAMsw) of the dam meets a first lateral wall from among lateral walls (Rsw) of the recess, the first lateral wall being adjacent to the display area; wherein the first inorganic encapsulation layer directly contacts the first insulating layer inside the transmission hole, the first insulating layer being an inorganic insulating layer, and characterised in that the opposite electrode and the at least one of the first functional layer or the second functional layer extend from the display area to the non-display area to be located inside the recess, and include the transmission hole exposing the portion of the non-display area. a substrate comprising an opening area, a display area, and a non-display area, the display area surrounding the opening area, and the non-display area being between the opening area and the display area; a plurality of display elements (OLED) at the display area of the substrate, each of the plurality of display elements (OLED) comprising a pixel electrode, an emission layer on the pixel electrode, and an opposite electrode on the emission layer; a thin-film encapsulation layer covering the plurality of display elements (OLED), and comprising a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer; a dam at the non-display area, wherein the dam protrudes from a top surface of a first insulating layer; a recess between the opening area and the dam, wherein the recess is recessed in a depth direction of the first insulating layer; a first functional layer between the pixel electrode and the emission layer; and a second functional layer between the emission layer and the opposite electrode; wherein the first and second functional layers and and the opposite electrode each include a transmission hole exposing a portion of the non-display area between the recess and the opening area; and, wherein a lateral wall (DAMsw) of the dam meets a first lateral wall from among lateral walls (Rsw) of the recess, the first lateral wall being adjacent to the display area; wherein the first inorganic encapsulation layer directly contacts the first insulating layer inside the transmission hole, the first insulating layer being an inorganic insulating layer, and characterised in that the opposite electrode and the at least one of the first functional layer or the second functional layer extend from the display area to the non-display area to be located inside the recess, and include the transmission hole exposing the portion of the non-display area.