The general field of the invention is that of the display systems comprising an optical combiner and a removable sun visor. The optical combiner is a semi-reflecting plate and the sun visor is a thin, thick and tinted plate, the sun visor comprising means for mechanically fastening on the optical combiner. The optical combiner comprises, on a first side, a first mechanical piece and, on a second side opposite to the first side, a second mechanical piece, the optical sun visor comprises, on a first side, a third mechanical piece and, on a second side opposite to the first side, a fourth mechanical piece in the form of a clip, the third mechanical piece being able to be sunk into the first mechanical piece so as to form a hinge, the rotation axis of which is parallel to the first side of the optical combiner, the fourth mechanical piece being able to be clipped into the third mechanical piece so as to lock the sun visor on the combiner.