A display device includes a display panel and an optical member. The display panel includes a lower substrate and an upper substrate. The display panel forms a light-transmitting area and a display area near the light-transmitting area. The optical member is adjacent to a rear surface of the display panel and overlaps with a portion corresponding to the light-transmitting area. The display area includes a thin film transistor and an organic light emitting element configured to receive a current from the thin film transistor. The light-transmitting area does not include a metal layer, which is disposed in the display area. The upper substrate and the lower substrate do not have a through-hole structure in the light-transmitting area.

A display device includes a display panel and an optical member. The display panel includes a lower substrate and an upper substrate. The display panel forms a light-transmitting area and a display area near the light-transmitting area. The optical member is adjacent to a rear surface of the display panel and overlaps with a portion corresponding to the light-transmitting area. The display area includes a thin film transistor and an organic light emitting element configured to receive a current from the thin film transistor. The light-transmitting area does not include a metal layer, which is disposed in the display area. The upper substrate and the lower substrate do not have a through-hole structure in the light-transmitting area.

A display device is provided. The display device includes first, second and third front signal lines disposed on a first portion and electrically connected to light emitting elements, connection lines overlapping a second portion, and first, second and third rear signal lines disposed on a third portion. The first, second and third front signal lines are disposed on different layers. The first front signal line and the first rear signal line are disposed on a same layer. The second front signal line and the second rear signal line are disposed on a same layer. The third front signal line and the third rear signal line are disposed on a same layer. The connection lines electrically and selectively connect the front signal lines and the rear signal lines.

A display device includes a substrate, a first semiconductor pattern on the substrate and including a semiconductor layer of a first transistor, a first gate insulator on the substrate, a first conductive layer on the first gate insulator and including a first gate electrode of the first transistor and a first electrode of the capacitor connected to the first gate electrode of the first transistor, a first interlayer dielectric on the first gate insulator, a second semiconductor pattern on the first interlayer dielectric and including a semiconductor layer of a second transistor and a second electrode of the capacitor, a second gate insulator on the first interlayer dielectric, a second conductive layer on the second gate insulator and including a gate electrode of the second transistor and a third semiconductor pattern between the second semiconductor pattern and any one of the first conductive layer and the second conductive layer.

A display device includes a substrate, a first semiconductor pattern on the substrate and including a semiconductor layer of a first transistor, a first gate insulator on the substrate, a first conductive layer on the first gate insulator and including a first gate electrode of the first transistor and a first electrode of the capacitor connected to the first gate electrode of the first transistor, a first interlayer dielectric on the first gate insulator, a second semiconductor pattern on the first interlayer dielectric and including a semiconductor layer of a second transistor and a second electrode of the capacitor, a second gate insulator on the first interlayer dielectric, a second conductive layer on the second gate insulator and including a gate electrode of the second transistor and a third semiconductor pattern between the second semiconductor pattern and any one of the first conductive layer and the second conductive layer.

A display device includes: a substrate including a display area and a non-display area; a circuit portion including a first circuit portion and a second circuit portion on the non-display area; a valley portion separating the first circuit portion and the second circuit portion from each other; and a thin film encapsulation layer sealing the display area, the thin film encapsulation layer extending from the display area to the valley portion, and the first circuit portion is between the valley portion and the display area, the second circuit portion is at an outside of the valley portion, an internal layer on the first circuit portion includes a plurality of island portions that are apart from one another in a first direction and a second direction crossing the first direction, and an external layer on the second circuit portion includes at least one groove extending in the first direction.

A display apparatus includes a substrate defining an opening area and including a display area and an intermediate area between the opening area and the display area; an inorganic insulating layer in the display area and the intermediate area; a pixel circuit in the display area; an organic insulating layer on the pixel circuit; a pixel electrode on the organic insulating layer, an intermediate layer on the pixel electrode, and an opposite electrode on the intermediate layer; a thin-film encapsulation layer on the opposite electrode and comprising a first inorganic encapsulation layer, a second inorganic encapsulation layer, and an organic encapsulation layer between the first and second inorganic encapsulation layer; and a partition wall on the organic insulating layer and including at least two dams, wherein the inorganic insulating layer is in contact with the thin-film encapsulation layer in an area between the partition wall and the opening area.

A display apparatus includes a substrate defining an opening area and including a display area and an intermediate area between the opening area and the display area; an inorganic insulating layer in the display area and the intermediate area; a pixel circuit in the display area; an organic insulating layer on the pixel circuit; a pixel electrode on the organic insulating layer, an intermediate layer on the pixel electrode, and an opposite electrode on the intermediate layer; a thin-film encapsulation layer on the opposite electrode and comprising a first inorganic encapsulation layer, a second inorganic encapsulation layer, and an organic encapsulation layer between the first and second inorganic encapsulation layer; and a partition wall on the organic insulating layer and including at least two dams, wherein the inorganic insulating layer is in contact with the thin-film encapsulation layer in an area between the partition wall and the opening area.

A display device includes a substrate, a driving pad disposed on the substrate, an insulating layer covering the driving pad, disposed on the substrate, and including an engraved pattern through which at least a portion of the driving pad is exposed, and a circuit board including a circuit pad having a shape inserted into the engraved pattern and making contact with the driving pad.

A display device includes a substrate, a driving pad disposed on the substrate, an insulating layer covering the driving pad, disposed on the substrate, and including an engraved pattern through which at least a portion of the driving pad is exposed, and a circuit board including a circuit pad having a shape inserted into the engraved pattern and making contact with the driving pad.