Patent ID: 7422259

Claim:
A display system on mobile system comprising: a) a mobile platform having a display space; b) a hanging rail provided across the display space; c) a plurality of display boards, hanging down from the hanging rail, having top and bottom edges, an inner edge, an outer edge, and two or more display surfaces; d) a hanging roller device, for each of the display board, having two rollers connected with a connecting bar, a board holder fixed to the connecting bar at a first end and fixed to the top edge of the display board, and a neck portion provided at the board holder; and e) a spacer, for keeping a predetermined distance between two neighboring display boards, having a center member and two rings connected extendably to both ends of the center member, wherein the display surfaces of the display board are adapted for displaying sheets and small items, wherein the display boards move along the hanging rail across the display space, wherein the predetermined distance between two neighboring display boards is adjustable according to the sheets and the small items displayed on the display surfaces to make the most of the display space, wherein the neck portion of the hanging roller device is fitted into one of the two rings of the spacer substantially frictionlessly.