An object of the present invention is to provide a way of improving the stitching procedure. The second substrate unit is disposed on the outer surface of the optical imaging unit and electrically connected to the first substrate unit. Moreover, it is preferable to calculate a corrosivity index, estimate a first-year corrosion amount of the atmospheric corrosion resistant steel and a rust stabilization index from the corrosivity index, and calculate a corrosion amount accumulated over time. A microprocessor controlling the LCD display system is reading this identification register and providing the software customization elements specific to the LCD-driver chip and to the LCD-module during an initialization step of the system. , during handling, by hydrophobic material. This data is then communicated to the associated user.