| 摘要 |
PURPOSE:To rotate the main axis of a projecting direction when an audience moves by providing a rotating means which moves the direction of a light source, detecting the position of an object towards the projecting direction, and controlling the rotating means based on the output. CONSTITUTION:A light source 1 modulates a signal transmitted from a stereo device or the like, driven and controlled by a driving circuit 11 with a current control, which outputs a single output signal, and music information is transmitted with a light beam. Then, this device is equipped with a rotating means 3 which moves the direction vertical to a projected face, that is, the projecting direction of the light source 1, and a controlling means 5 controls the rotating means 3 based on the output of a detecting means 4 which detects the position of the object towards the projecting direction. Thus, the main axis of the projecting direction can be rotated when the audience moves. |
