| 摘要 |
<p>PURPOSE:To always receive screen data by a device being near a superintendent, when a specific event is generated by detecting whether the superintendent is in each installation part of an image display device or not, and determining the device of the installation part in which the superintendent is as a display output destination of the screen data. CONSTITUTION:In the vicinity of each CRT display device 6 - 9, radio card receiving devices 10 - 13 are installed, respectively, and on the other hand, a superintendent 15 has a radio card 14 with him. When the superintendent 15 approaches one CRT display device, for instance, the device 8, the receiving device 12 receives a signal from the radio card 14, and it is informed to a display CRT determining part 5 that the superintendent 15 exists close to the device 8. The determining part 5 determines the device 8 as a display destination of a screen, and informs its fact to a display control part 4. The display part 4 displays screen data corresponding to a generated event on the display device 8.</p> |
