Abstract: A mobile electronic device, for example a smartphone, may feature thin or curved borders at the left, right, top, and/or bottom edge of the display screen. To accommodate front-facing optical sensor(s) and/or emitter(s) despite a border that is too thin (e.g., too thin for a front camera module and lens), two or more corners of the display panel have a cutout, and the optical sensor(s) and/or emitter(s) are disposed, at least in part, in the areas of these cutouts at the corners. The cutouts may have a convex shape for the most part, thereby maximizing the remaining screen area. At least one embodiment of the mobile electronic device may have a display panel with at least three curved edges, a maximized screen surface, and minimized outer dimensions.