Abstract: In an apparatus having a video display and display-synchronizing motion mechanism, various images can be easily selected and displayed, and a seat or the like is moved in synchronism with motions in the images, so that a person can enjoy the images as if real. An information select unit specifies a desired one of a plurality of video/motion information pieces recorded on a storage medium, and an information read unit reads the specified video/movement information. Images formed by video information contained in the readout video/motion information are displayed on a display device, and the seat or the like is moved in synchronism with the images on the basis of motion information contained therein. A monitor unit monitors the readout video/motion information, and stops a read operation of the information read unit when the apparatus malfunctions.

Abstract: A device for detecting an object by detecting an infrared ray emitted from a moving object. The device includes a plurality of light receiving elements, each being disposed so as to receive infrared rays at a predetermined directional optical angle, and the position of and distance to the object is detected based on detection results by the respective light receiving elements. The moving speed and acceleration of the object are also detected from detection results by the respective light receiving elements, taking time-varying factors into consideration.