WIPING DEVICE FOR MOTOR VEHICLE WINDOWS, COMPRISING A WINDSCREEN WIPER FRAME AND A PIEZOELECTRIC FILM

The invention relates to a wiping device () for a motor vehicle window (), comprising a windscreen wiper frame () and a piezoelectric film (), said piezoelectric film () being mounted on the windscreen wiper frame () such as to produce an electric current. The invention also relates to a warning method and a spray control method for such a wiping device ().