A first thermally conductive layer 80 may be located in the peripheral area PA of the lower substrate 100. The first thermally conductive layer 80 may be located such that a part of the first thermally conductive layer 80 overlaps the seal 400 and the common power supply line 70 in the z direction. The first thermally conductive layer 80 may extend to an outermost portion including the edges of the lower substrate 100. The first thermally conductive layer 80 may outwardly discharge heat produced by laser energy emitted to cure the seal 400.

Referring to FIG. 1, the first thermally conductive layer 80 may have an open loop shape and may surround a part of the display unit 10. The first thermally conductive layer 80 may be located along three edges of the lower substrate 100. In some implementations, a width and a structure of the first thermally conductive layer 80 may be modified according to a desired heat dissipation efficiency, as will be described in detail with reference to FIG. 3 and other figures.

FIG. 3 illustrates a cross-sectional view of a display apparatus according to an embodiment. FIG. 3 shows a view taken along line III-III′ of FIG. 1.

Referring to FIG. 3, the display apparatus may include the display area DA and the peripheral area PA. Each of the lower substrate 100 and the upper substrate 300 may include the display area DA and the peripheral area PA.