Method and system for simultaneous operation of multiple handheld control devices in a data processing system
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United States of America Patent
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Nov 7, 2000
Grant Date -
N/A
app pub date -
Mar 26, 1997
filing date -
Mar 26, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A method and system for controlling a display of a data processing system uses first and second wireless position control devices, and a control base unit. The first wireless position control device includes an acoustical transducer for transmitting a first ultrasonic carrier signal upon which X-Y position control and/or action control signals generated by the device are imposed. A second wireless position control device includes and acoustical transducer for transmitting a second ultrasonic carrier signal upon which X-Y position control and/or other action control signals generated by the second control device are imposed. The first and second ultrasonic carrier signals have different frequencies. The control base is associated with the data processing system and includes circuitry for receiving and differentiating the first and second ultrasonic carrier signals to generate decoded display control signals. The display control signals are then used to drive the display device. Two users may thus control the display device simultaneously.
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