DISPLAY DEVICE INCLUDING A POWER SUPPLY LINE THAT OVERLAPS A DRIVING CIRCUIT

1 . A display device comprising:

a substrate;

a display unit disposed on the substrate and comprising a pixel circuit and a display element electrically connected to the pixel circuit;

a driving circuit disposed outside of the display unit, the driving circuit comprising a thin film transistor;

an inorganic insulating layer disposed on the driving circuit;

a power supply line disposed on the inorganic insulating layer and electrically connected to a common electrode of the display element;

an encapsulation substrate disposed on the power supply line and facing the substrate; and

a sealing material interposed between the substrate and the encapsulation substrate,

wherein a portion of the sealing material, a portion of the power supply line, and a portion of the driving circuit overlap each other,

wherein the inorganic insulating layer partially overlaps a connection line and the power supply line is directly electrically connected to the connection line through a contact hole in the inorganic insulating layer that is overlapped by the sealing material, and

wherein the inorganic insulating layer forms a pair of stepped-up portions where it overlaps opposite ends of the connection line across the contact hole in the inorganic insulating layer and the sealing material covers both of the pair of stepped-up portions of the inorganic insulating layer.