A display device includes a substrate including a first display area and a second display area, first pixels disposed on the substrate in the first display area, a functional module disposed below the substrate in the second display area, and a light block layer disposed on the functional module. The light block layer includes patterns disposed in a matrix in the second display area. The second display area includes a transmission area as an area in the second display area not including the light block layer. Each of the patterns include a main part having a substantially rectangular shape with substantially rounded corners and line parts substantially curved away from the main part.