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1. A display device, comprising: a display mechanism and a motion mechanism; wherein the display mechanism comprises a plurality of first display groups, a plurality of second display groups, and a plurality of third display groups arranged along a first direction, the motion mechanism is connected to the first display groups, the motion mechanism is configured to guide the first display groups to move along the first direction, the motion mechanism is connected to the second display groups, the motion mechanism is configured to guide the second display groups to move along the first direction, the motion mechanism is connected to the third display groups, and the motion mechanism is configured to guide the third display groups to move along the first direction; and the display device comprises a middle display region and an extension display region located on an opposite side of the middle display region; the display device has a first and a second display modes; in the first display mode, the first, second, and third display groups are located in the middle display region; and in the second display mode, a part of the first display groups, a part of the second display groups, and a part of the third display groups are located in the extension display region; and the motion mechanism comprises skid rails extended along the first direction, and the skid rails cross the middle display region and the extension display region; and the skid rails comprise magnetic wheels respectively connected to the first, second, and third display groups, and magnetic rails movably connected to the magnetic wheels.
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