A portable electronic device may include a housing member, a rear cover coupled to the housing member, and a top module coupled to the housing member and including a front cover defining an exterior surface and an interior surface opposite to the exterior surface, a display stack attached to the interior surface of the front cover and comprising a flexible circuit element extending from a side of the display stack, a frame member attached to the interior surface of the front cover and extending at least partially around a periphery of the display stack, and an encapsulating structure positioned between the frame member and the display stack and at least partially encapsulating a portion of a peripheral side of the display stack and the flexible circuit element. The encapsulating structure may cover at least a portion of a bottom side of the display stack.