| 摘要 |
A display system may include a frame, column connection members connected to the frame, and column members rotatably connected to the column connection members. The display system may also include a magnetic drive assembly carried by the frame that engages the column connection members to selectively rotate the column members. The magnetic drive assembly may include a power source, energizing members connected to the power source, and column movement members connected to the column connection members. The energizing members may include an electromagnet, and the column movement members may be positioned spaced-apart from and overlying the energizing members. The electromagnet of the energizing members may be selectively energized to form a magnetic field between the energizing members and the column movement members to selectively cause rotation of the column members.
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