A multiple use ticket generating method is disclosed which enables a recipient to obtain signatures for arbitrarily many messages after only one interaction with the signer. According to the invention, the device comprises a column with a plurality of sectors Sk with 2 superimposed plates Pi with a single distribution network, each sector Sk comprising an external principal bypass line Lk connected to each plate Pi of Sk via a plate valve Vi. Upper surface of the insulating body has accommodation holes. The fields of view of the left and right apertures may be spaced apart relative to each other, thereby forming a blind spot in the overall field of view of the system. The display panel driver has latches individually, respectively hold pixel data pieces, each of which is for a pixel, based on an input video signal according to information stored in a setting register and applies drive pulses corresponding to the pixel data pieces held in the latches to the source lines of the display panel.