| 摘要 |
PURPOSE:To obtain ambient visual information on the circumference without necessitating a manual operation by a user. CONSTITUTION:An image forming means 244 is controlled by a whole parts controlling means 246 so as to display a graphic image on a liquid crystal display 23, and when it is detected by a state deciding means 242 based on detection data outputted from a three-dimensional state sensor 21 that the fluctuation state of the user's head comes to a previously set specified fluctuation state, the graphic image display is stopped by the whole parts controlling means 246, a liquid crystal shutter 24 is opened and the visual information to be presented on the line of the user's sight is switched over to the ambient visual information on the circumference. |
