| 摘要 |
<p>A system for scanning a room (10) to find the location of target devices (14-16), and then locking onto them with stationary directed beams (26,26') for two-way communication. In one embodiment, a base system in each room comprises an IR source/receiver (18,19) combination plus an LCD display panel (20) which covers the source/receiver (18,19) and is addressed in such a way as to open up dynamic apertures (25) through which IR radiation in a scanning mode can be directed toward any particular location in the room (10). When a device (14,15) at that location senses that it is being irradiated by the base station, the targeted device responds by emitting a coded packet of IR pulses. This system takes advantage of the higher bandwidth communication that can be obtained with point-to-point communications, while still allowing for multiple devices at arbitrary locations in the same room. <IMAGE></p> |
