A display device includes a base substrate including a front surface having an active area and a peripheral area; a plurality of pixels; a plurality of first signal lines on the active area, each extending in a first direction, spaced apart from each other in a second direction crossing the first direction; a plurality of second signal lines, crossing the first signal line in an insulation manner; a plurality of first conductive patterns, spaced apart from each other in the first direction; a second conductive pattern overlapping the first conductive patterns and having a top surface waved in the first direction; and an optical member on the second conductive pattern, wherein the top surface of the second conductive pattern includes flat portions and protruding portions, that are alternately arranged in the first direction, and the protruding portions protrude from the flat portions toward the optical member.