Abstract: The invention relates to display devices comprising one or more display cells.

Abstract: The disclosure is a helmet, for example a pilot's helmet, including a shell and an attachable structure carrying optronic equipment. To facilitate manual fitting and removal of the structure on the shell by the wearer, the structure is equipped with mobile linkage parts that can take two stable positions, with a mechanism for locking the linkage parts in these positions, an open position used during the initial positioning of the structure on the shell, and a closed position in which the linkage parts lock the structure on the shell. Fitting and removal of the structure is further facilitated by the fact that the linkage parts can be opened or closed simply by pressing manually on two parts mounted symmetrically, one on each side of the shell, and that each position of the linkage parts is maintained by the mechanism for locking.

Abstract: A device for the mechanical hooking of a display system to a helmet which includes a sheath that surrounds the body of the display system except for elbowed optical elements leading to the combiner forming the eye-piece of the display system and that has a projecting longitudinal ridge acting as a guiding shaft for the hooking and as a fastening lug, and also includes a hooking stud. The device also has a stage that is interposed between the side wall of the helmet and the sheath. This stage is provided with a channel designed to receive the longitudinal ridge of the sheath and a hook jaw designed to grasp the hooking stud. The device is fixed to the side wall of the helmet by mechanism enabling the adjustment of its position both vertically and laterally, to enable the adjusting of the position of the eye-piece of the display system in the alignment of the helmet wearer's eye.