A display panel comprising: a substrate comprising: a front display area, wherein at least one first display element is in the front display area; a first side display area connected in a first direction to the front display area; a second side display area connected in a second direction intersecting the first direction to the front display area; a corner display area between the first side display area and the second side display area, wherein the corner display area at least partially surrounds the front display area and includes a plurality of extension areas extending from an intermediate display area, and at least one second display element is in the corner display area, wherein the first side display area is bent with a first radius of curvature, the second side display area is bent with a second radius of curvature different from the first radius of curvature, and the intermediate display area between the front display area and the corner display area, wherein at least one third display element is in the intermediate display area, wherein at least one groove (Gv) is defined on the substrate in an extension area of the plurality of extension areas and is recessed in a thickness direction of the substrate; and an inorganic pattern layer on opposing sides of the groove (Gv) on the substrate, wherein the inorganic pattern layer comprises a pair of protruding tips protruding toward a center of the groove (Gv), wherein the groove (Gv) or at least one of the grooves (Gv) is between the second display element and the third display element. a substrate comprising: a front display area, wherein at least one first display element is in the front display area; a first side display area connected in a first direction to the front display area; a second side display area connected in a second direction intersecting the first direction to the front display area; a corner display area between the first side display area and the second side display area, wherein the corner display area at least partially surrounds the front display area and includes a plurality of extension areas extending from an intermediate display area, and at least one second display element is in the corner display area, wherein the first side display area is bent with a first radius of curvature, the second side display area is bent with a second radius of curvature different from the first radius of curvature, and the intermediate display area between the front display area and the corner display area, wherein at least one third display element is in the intermediate display area, wherein at least one groove (Gv) is defined on the substrate in an extension area of the plurality of extension areas and is recessed in a thickness direction of the substrate; and a front display area, wherein at least one first display element is in the front display area; a first side display area connected in a first direction to the front display area; a second side display area connected in a second direction intersecting the first direction to the front display area; a corner display area between the first side display area and the second side display area, wherein the corner display area at least partially surrounds the front display area and includes a plurality of extension areas extending from an intermediate display area, and at least one second display element is in the corner display area, wherein the first side display area is bent with a first radius of curvature, the second side display area is bent with a second radius of curvature different from the first radius of curvature, and the intermediate display area between the front display area and the corner display area, wherein at least one third display element is in the intermediate display area, wherein at least one groove (Gv) is defined on the substrate in an extension area of the plurality of extension areas and is recessed in a thickness direction of the substrate; and an inorganic pattern layer on opposing sides of the groove (Gv) on the substrate, wherein the inorganic pattern layer comprises a pair of protruding tips protruding toward a center of the groove (Gv), wherein the groove (Gv) or at least one of the grooves (Gv) is between the second display element and the third display element.