In a liquid crystal display device of the present invention, a source line is formed of a gate metal and a gate line is formed of a source metal for reduction of the number of masks, whereby deterioration of a liquid crystal on the gate line is prevented. Two removable inserts are provided, which may even be manufactured using a type of polymer material different from that of the shell, have parts which are designed to interfere both with the outer surface and with the inner surface of the said flaps and also have interconnecting parts which are designed to be retained by the twfo sections of the transverse slit. Since the sensor module and the motor module are physically separated, these modules can separately be produced, and the steering torque sensor and the electric motor can independently be adjusted. A deinterleaver deinterleaves an equalized signal, a decoder decodes a deinterleaved signal, and a parallel-to-serial converter converts parallel decoded signal to a signal stream.