A system and methods of transmitting information between a first location and a second location comprise transmitting a data signal and a known signal from one of the first location and the second location over a signal channel having a first noise component. Each of the left lamp unit and the right lamp unit includes a bulb, a movable shade, a shade moving mechanism and a fixed shade. The illumination optical system has a part, in an area where both the illumination light and the image light pass, which changes an optical action depending on a state of incident light. The trained neural network can process a received image containing characters associated with building numbers. Preferably, a volumetric capacity of the pressure generation chambers is changed in accordance with a change in the pressure, to eject an ink droplet from the nozzle orifice. The wing part extends from an edge of the base film and is fixed to a side surface of the backlight unit.