| 摘要 |
PROBLEM TO BE SOLVED: To satisfactorily control movement of a moving body, based on a pulse signal generated by a pulse generation mechanism with the rotation of a drive motor and detection outputs of position detection sensors for detecting that the moving body moves to a predetermined position. SOLUTION: An audio unit body 2 having a built-in speaker is vertically moved by the drive motor. The audio unit 2 becomes in an exposing state in which the display of a display unit body 3 is exposed, and in a screening state in which the display is covered and hidden. Based on a pulse signal generated by the pulse generation mechanism with the rotation of the motor and detection outputs of the position of the audio unit 2 by position detection sensors 29-32, a microcomputer controls the operation of the drive motor. The microcomputer detects a travel distance by counting the pulses of the pulse signal. Since the operation of the drive motor is controlled by using not only the detection outputs of the position detection sensors but the pulse signal from the pulse generation mechanism, movement of the audio unit 2 can be satisfactorily controlled, even when the position detection sensors become incapable of functioning, for example. COPYRIGHT: (C)2008,JPO&INPIT
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