Abstract: According to a mixed reality realizing system of the present invention, when a viewer wears a head mount display (HMD) including a video display and a CCD camera, and views an exhibit using an optical see-through type system, identification signals and position signals transmitted from infrared LEDs located around the exhibit are received to determine a position of the exhibit, and to superimpose contents such as explanations of the exhibit, which have been stored in advance in a portable computer, on a predetermined position on the video display where the exhibit is displayed.

Abstract: According to a mixed reality realizing system of the present invention, when a viewer wears a head mount display (HMD) including a video display and a CCD camera, and views an exhibit using an optical see-through type system, identification signals and position signals transmitted from infrared LEDs located around the exhibit are received to determine a position of the exhibit, and to superimpose contents such as explanations of the exhibit, which have been stored in advance in a portable computer, on a predetermined position on the video display where the exhibit is displayed.

Abstract: A maintenance system includes: a maintenance terminal device having a head-mount display having a display, an audio communication device and a CCD camera, and a portable computer connected to the head-mount display; a monitoring and controlling unit provided in a monitoring room and having a control computer for controlling plant equipment and a control panel connected to the computer for monitoring the plant equipment; and a communication link for wirelessly connecting the monitoring and controlling unit with the maintenance terminal device. The system further includes a remote control function enabling the control panel to be operated with the maintenance terminal device, and a conferencing function enabling voice communication between a maintenance worker and a monitoring worker and enabling an image captured by the CCD camera to be displayed on an image display device provided in the control panel.