A mobile electronic device comprising: a display comprising a flat surface and a curved surface extending from the flat surface, wherein the display comprises: an external transparent protective layer having an external surface providing said flat surface and said curved surface; an opaque area disposed at an edge of the curved surface under the external transparent protective layer; and a panel module disposed under the external transparent protective layer, the panel module comprising a display area and a non-display area, the display area being disposed under the flat surface and a part of the curved surface, the non-display area being disposed under the other part of the curved surface, and a boundary line between the display area and the non-display area extending in a direction substantially parallel to the flat surface, wherein: the opaque area has an inner edge, proximate the flat surface, arranged parallel to said boundary line and such that when viewed from a first direction (1a th) normal to the curved surface the boundary line is visible and appears to be separated from the inner edge by a first distance, and when viewed from a second direction (2a th) normal to the flat surface the boundary line is visible and appears to be separated from the inner edge by a second distance; and the boundary line, inner edge, and external transparent protective layer are arranged such that said first distance appears equal to said second distance. a display comprising a flat surface and a curved surface extending from the flat surface, wherein the display comprises: an external transparent protective layer having an external surface providing said flat surface and said curved surface; an opaque area disposed at an edge of the curved surface under the external transparent protective layer; and a panel module disposed under the external transparent protective layer, the panel module comprising a display area and a non-display area, the display area being disposed under the flat surface and a part of the curved surface, the non-display area being disposed under the other part of the curved surface, and a boundary line between the display area and the non-display area extending in a direction substantially parallel to the flat surface, wherein: the opaque area has an inner edge, proximate the flat surface, arranged parallel to said boundary line and such that when viewed from a first direction (1a th) normal to the curved surface the boundary line is visible and appears to be separated from the inner edge by a first distance, and when viewed from a second direction (2a th) normal to the flat surface the boundary line is visible and appears to be separated from the inner edge by a second distance; and the boundary line, inner edge, and external transparent protective layer are arranged such that said first distance appears equal to said second distance. an external transparent protective layer having an external surface providing said flat surface and said curved surface; an opaque area disposed at an edge of the curved surface under the external transparent protective layer; and a panel module disposed under the external transparent protective layer, the panel module comprising a display area and a non-display area, the display area being disposed under the flat surface and a part of the curved surface, the non-display area being disposed under the other part of the curved surface, and a boundary line between the display area and the non-display area extending in a direction substantially parallel to the flat surface, wherein: the opaque area has an inner edge, proximate the flat surface, arranged parallel to said boundary line and such that when viewed from a first direction (1a th) normal to the curved surface the boundary line is visible and appears to be separated from the inner edge by a first distance, and when viewed from a second direction (2a th) normal to the flat surface the boundary line is visible and appears to be separated from the inner edge by a second distance; and the boundary line, inner edge, and external transparent protective layer are arranged such that said first distance appears equal to said second distance. the opaque area has an inner edge, proximate the flat surface, arranged parallel to said boundary line and such that when viewed from a first direction (1a th) normal to the curved surface the boundary line is visible and appears to be separated from the inner edge by a first distance, and when viewed from a second direction (2a th) normal to the flat surface the boundary line is visible and appears to be separated from the inner edge by a second distance; and the boundary line, inner edge, and external transparent protective layer are arranged such that said first distance appears equal to said second distance.