Multiplex communications – Pathfinding or routing – Through a circuit switch
Patent
1999-11-17
2000-10-24
Hsu, Alpus H.
Multiplex communications
Pathfinding or routing
Through a circuit switch
34082503, 34082517, 34082569, 362 84, 341 20, 370357, H04B 900, H04L 1242, H04J 302
Patent
active
061377945
ABSTRACT:
A method and apparatus for controlling a remotely located audio-visual projector. In preferred embodiments, the invention enables connection of any selected one of a number of input devices (such as video cassette recorders or computers) to the projector so that a sequence of different input devices can be selected during a single presentation. In preferred embodiments, the apparatus of the invention includes removable rubberized keys for selecting individual ones of the input devices, and pre-printed transparent labels that are backlit to identify each selected input device. In some embodiments, the apparatus of the invention includes a projector power status detection and indication subsystem which performs a calibration operation to determine one or more power threshold values and then uses each determined threshold value to determine the power status of the projector. Preferably, the control panel includes or is coupled to a processor that is operable in a learning mode in which it is coupled to a special-purpose remote controller for use with the projector and learns projector control commands asserted by the special-purpose remote controller, and following the learning mode the control panel is operable in a normal mode in which it controls the projector by emulating the learned projector control commands.
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Hsu Alpus H.
Qureshi Afsar M.
SP Controls, Inc.
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