Method and system for simultaneous operation of multiple handheld control devices in a data processing system
First Claim
1. A display control system for simultaneously receiving control signals from a plurality of remote input control devices comprising:
- a first remote control device having a control element, for producing first control signals in response to manual input, and a transmitter which transmits a first carrier signal having a first frequency modulated by the first control signals;
a second remote control device having a control element, for producing second control signals in response to manual input, and a transmitter which transmits a second carrier signal having a second frequency modulated by the second control signals;
a receiver having a transducer for simultaneously receiving the first and second carrier signals and converting the signals into a composite electrical signal, a splitter for separating the composite electrical signal into first and second component signals having the first and a second frequencies, and first and second demodulators for deriving the first and second control signals from the first and second component signals, the first and second control signals controlling first and second display elements on a display device.
1 Assignment
0 Petitions
Accused Products
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.
185 Citations
16 Claims
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1. A display control system for simultaneously receiving control signals from a plurality of remote input control devices comprising:
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a first remote control device having a control element, for producing first control signals in response to manual input, and a transmitter which transmits a first carrier signal having a first frequency modulated by the first control signals; a second remote control device having a control element, for producing second control signals in response to manual input, and a transmitter which transmits a second carrier signal having a second frequency modulated by the second control signals; a receiver having a transducer for simultaneously receiving the first and second carrier signals and converting the signals into a composite electrical signal, a splitter for separating the composite electrical signal into first and second component signals having the first and a second frequencies, and first and second demodulators for deriving the first and second control signals from the first and second component signals, the first and second control signals controlling first and second display elements on a display device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. The receiver for simultaneously receiving control signals of at least a first and a second frequency from a plurality of remote control devices, comprising;
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a transducer for simultaneously receiving first and second carrier signals and converting the signals into a composite electrical signal; a splitter for separating the composite electrical signal into first and second component signals having the first and a second frequencies; and first and second demodulators for deriving the control signals from the first and second component signals. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A display control system for simultaneously receiving control signals from a plurality of remote input control devices comprising:
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a first remote control device having a control element movable in an X-Y plane, for producing first control signals in response to manual input, and a transmitter which transmits a first carrier signal having a first frequency modulated by the first control signals; a second remote control device having a control element movable in an X-Y plane, for producing second control signals in response to manual input, and a transmitter which transmits a second carrier signal having a second frequency modulated by the second control signals; a receiver having a transducer for simultaneously receiving the first and second carrier signals and converting the signals into a composite electrical signal; a first filter connected to receive the composite electrical signal and provide a first component signal, the first filter allowing signals having the first frequency to pass while blocking the signals of the second frequency; a second filter connected to receive the composite electrical signal and provide a second component signal, the second filter allowing signals having the second frequency to pass while blocking the signals of the first frequency; and first and second demodulators for deriving the first and second control signals from the first and second component signals, the first and second control signals controlling first and second display elements on a display device.
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Specification