A display module , comprising: a window member including a convex upper surface, wherein a first window area (WA1) has a first average thickness and a second window area (WA2) has a second average thickness greater than the first average thickness; and a display panel including: a first display area (DA1) overlapped by the first window area (WA1) in a thickness direction (DR1) and including a plurality of first pixels (PX1), and a second display area (DA2) overlapped by the second window area (WA2) in the thickness direction (DR1) and including a plurality of second pixels (PX2), wherein at least one of the plurality of second pixels (PX2) has a second pixel area (PS2) smaller than a first pixel area (PS1) of at least one of the plurality of first pixels (PX1), wherein the window member includes a flat lower surface, the display module being characterized in that the first and second pixels (PX1, PX2) satisfy the equation (ES1/PS1)<(ES2/PS2), wherein PS1 denotes the first pixel area, ES1 denotes a first light emitting area of at least one of the plurality of first pixels (PX1), PS2 denotes the second pixel area, and ES2 denotes a second light emitting area of at least one of the plurality of second pixels (PX2), wherein the display panel further comprises a first pixel definition layer (PDL1) exposing a lower electrode (LE) of at least one of the plurality of first pixels (PX1) to correspond to the first light emitting area (ES1), and a second pixel definition layer (PX2) exposing a lower electrode (LE) of at least one of the plurality of the second pixels (PX2) to correspond to the second light emitting area (ES2). a window member including a convex upper surface, wherein a first window area (WA1) has a first average thickness and a second window area (WA2) has a second average thickness greater than the first average thickness; and a display panel including: a first display area (DA1) overlapped by the first window area (WA1) in a thickness direction (DR1) and including a plurality of first pixels (PX1), and a second display area (DA2) overlapped by the second window area (WA2) in the thickness direction (DR1) and including a plurality of second pixels (PX2), wherein at least one of the plurality of second pixels (PX2) has a second pixel area (PS2) smaller than a first pixel area (PS1) of at least one of the plurality of first pixels (PX1), wherein the window member includes a flat lower surface, a first display area (DA1) overlapped by the first window area (WA1) in a thickness direction (DR1) and including a plurality of first pixels (PX1), and a second display area (DA2) overlapped by the second window area (WA2) in the thickness direction (DR1) and including a plurality of second pixels (PX2), wherein at least one of the plurality of second pixels (PX2) has a second pixel area (PS2) smaller than a first pixel area (PS1) of at least one of the plurality of first pixels (PX1), wherein the window member includes a flat lower surface, the first and second pixels (PX1, PX2) satisfy the equation (ES1/PS1)<(ES2/PS2), wherein PS1 denotes the first pixel area, ES1 denotes a first light emitting area of at least one of the plurality of first pixels (PX1), PS2 denotes the second pixel area, and ES2 denotes a second light emitting area of at least one of the plurality of second pixels (PX2), wherein the display panel further comprises a first pixel definition layer (PDL1) exposing a lower electrode (LE) of at least one of the plurality of first pixels (PX1) to correspond to the first light emitting area (ES1), and a second pixel definition layer (PX2) exposing a lower electrode (LE) of at least one of the plurality of the second pixels (PX2) to correspond to the second light emitting area (ES2). <EOS>