To obtain improved readability of a liquid crystal display screen under varied conditions of ambient luminosity, it is possible to increase the dynamic range of variation of the polarizing voltage. At least one mirror of the mirror system is arranged movably relative to the objective. A wireless power receiver on the first port includes a rectifier for converting the RF signal to a DC signal when the antenna couples to radiation in the near-field radiation band in a coupling-mode region of the antenna. The cam and strike are configured and attached to the door arm and cabinet inner surface such that the cam collides with the strike when the cabinet door is being initially opened at at least a predetermined speed.