A vertically aligned type liquid crystal display includes a liquid crystal layer disposed between pixel electrodes and a common electrode and containing vertically aligned liquid crystal molecules, the orientation of the liquid crystal molecules being controlled by an electric field. The radius of the structure is about that of a large pencil. The automobile door structure of the present invention can enhance a low-frequency sound capable of giving the impression of dignity on an occupant. By such arrangements, the limit switch is simplified, and with the arrangement of the connecting rod assembly, the number of the brake devices or the limit switches can be increased as desired. Related multicarrier transmitter and receiver structures and methods which reduce computation, increase transmission bandwidth and reduce transmission power are also developed. The rotor is supported by a pair of ball-bearing units and axial stability is provided by preloading the bearing unit at the end of the rotor with a relatively stiff spring and preloading the bearing at the second end with a relatively weak spring, whereby thermal expansion and contraction of the rotor are accommodated almost entirely by a movement of the second end of the rotor.