pixels in a display area, the pixels being spaced from each other and arranged along a first direction and a second direction crossing the first direction; and
a touch panel overlapping the display area, the touch panel comprising sensing units arranged along the first direction and connection parts to connect the sensing units to each other,
wherein at least one of the connection parts is entirely straight and elongated in a third direction to connect a first one of the sensing units to a second one of the sensing units, the third direction being inclined with respect to the first direction.