Visitors to the viewing galleries ascend to the 68th floor by means of two sets of lifts. The first climbs to the mid-point of the building on floor 33, where guests traverse to the second lift which completes the journey to the galleries on levels 69 and 72. Each lift has banks of LCD video screens covering the ceiling playing video loops of the building structure and visual effects. The lower, larger lift carriages have a 3 x 2 video wall comprising 40” LC displays; the higher lifts use two 60” monitors side-by-side.
Video sequences are managed from a Medialon Show Control, invoked at the start of each lift journey by signals generated by door closure after the visitors enter. Separate HD signals are transmitted from a set DVS Blades to each video screen.
All video equipment is located in the control at the base of the building with multimode fiber optic cable used to transmit the signal to the carriages.
“The distances are large, so fiber was the only option,” said Josh Miller, Technical Director of system integrator DJW. Signals for the higher lifts have to travel from the first floor control room to the very top of the building and then down to the mid-point when the lift is starting its ascent. This is a vertical distance of over 450 meters and the additional horizontal routing of the cable adds another 100 meters or so.”