The general field of the invention is that of Instrument panel or cockpit display systems. The system according to the invention comprises: a first display device comprising a semi-transparent screen upon which a first image is displayed; a second mobile display device mounted on a helmet or augmented reality glasses, the said second device comprising means of displaying a second image collimated in a predetermined visual field; a detection of the orientation and of the position of the helmet in a predetermined reference system; first means making it possible to determine the zone of intersection of the predetermined visual field with the semi-transparent screen; second means making it possible to display in the said zone of intersection of the semi-transparent screen a first specific image, and/or to display in the second display device a second specific image, which are functions of the first image and of the second image.