Multi-modal sensing surface
First Claim
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1. A multi-modal sensing surface comprising:
- two overlaid arrays, the two arrays comprising a capacitive sensing electrode array and an array of RF antennas;
a first sensing module coupled to the capacitive sensing electrode array and arranged to detect an increase in mutual capacitance between electrodes at first and second locations in the array caused by first and second objects being proximate to the multi-modal sensing surface; and
a second sensing module coupled to the array of RF antennas and arranged to, based at least in part on detecting the increase in mutual capacitance;
selectively tune a first RF antenna, in the array of RF antennas, to a first frequency, wherein the first RF antenna is associated with the first and second locations;
detune a second RF antenna in the array of antennas and a third RF antenna in the array of RF antennas to a second frequency different from the first frequency, wherein the second RF antenna is associated with the first location and not the second location and the third RF antenna is associated with the second location and not the first location;
receive, by the first RF antenna, data transmitted from a first wireless tag associated with the first object and data transmitted from a second wireless tag associated with the second object;
distinguish between the first wireless tag associated with the first object and the second wireless tag associated with the second object by;
selectively tuning the second RF antenna to the first frequency and detuning the first and third RF antennas to the second frequency,receiving, by the second RF antenna, data transmitted from the second wireless tag associated with the second object,selectively tuning the third RF antenna to the first frequency and detuning the second and third RF antennas to the second frequency, andreceiving, by the third RF antenna, data transmitted from the third wireless tag associated with the second object.
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Abstract
A multi-modal sensing surface comprises two overlaid arrays: a capacitive sensing electrode array and an array of RF antennas. A first sensing module is coupled to the capacitive sensing electrode array and is configured to detect both an increase and a decrease of capacitance between electrodes in the array. A second sensing module is coupled to the array of RF antennas and is configured to selectively tune and detune one or more of the RF antennas in the array of RF antennas.
154 Citations
20 Claims
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1. A multi-modal sensing surface comprising:
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two overlaid arrays, the two arrays comprising a capacitive sensing electrode array and an array of RF antennas; a first sensing module coupled to the capacitive sensing electrode array and arranged to detect an increase in mutual capacitance between electrodes at first and second locations in the array caused by first and second objects being proximate to the multi-modal sensing surface; and a second sensing module coupled to the array of RF antennas and arranged to, based at least in part on detecting the increase in mutual capacitance; selectively tune a first RF antenna, in the array of RF antennas, to a first frequency, wherein the first RF antenna is associated with the first and second locations; detune a second RF antenna in the array of antennas and a third RF antenna in the array of RF antennas to a second frequency different from the first frequency, wherein the second RF antenna is associated with the first location and not the second location and the third RF antenna is associated with the second location and not the first location; receive, by the first RF antenna, data transmitted from a first wireless tag associated with the first object and data transmitted from a second wireless tag associated with the second object; distinguish between the first wireless tag associated with the first object and the second wireless tag associated with the second object by; selectively tuning the second RF antenna to the first frequency and detuning the first and third RF antennas to the second frequency, receiving, by the second RF antenna, data transmitted from the second wireless tag associated with the second object, selectively tuning the third RF antenna to the first frequency and detuning the second and third RF antennas to the second frequency, and receiving, by the third RF antenna, data transmitted from the third wireless tag associated with the second object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of detecting and locating touch events and objects using a multi-modal sensing surface, the method comprising:
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detecting, by a first sensing module in the multi-modal sensing surface, a decrease in mutual capacitance between electrodes at first and second locations in a capacitive sensing electrode array in the multi-modal sensing surface; in response to detecting the increase in mutual capacitance between the electrodes at the first and second locations; determining that the first and second locations are associated with a first RF antenna in an array of RF antennas in the multi-modal sensing surface; selectively tuning the first RF antenna, in the array of RF antennas, to a first frequency, wherein the first RF antenna is associated with the first and second locations; detuning, by a second sensing module in the multi-modal sensing surface, second and third antennas in the array of RF antennas, to a second frequency that is different from the first frequency; distinguishing between a first wireless tag associated with the first location and a second wireless tag associated with the second location by; selectively tuning the second RF antenna to the first frequency and detuning the first and third RF antennas to the second frequency, receiving, by the second RF antenna, data transmitted from the second wireless tag associated with the second object, selectively tuning the third RF antenna to the first frequency and detuning the second and third RF antennas to the second frequency, and receiving, by the third RF antenna, data transmitted from the third wireless tag associated with the second object. - View Dependent Claims (15, 16, 17)
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18. One or more computer-readable storage media storing instructions that, when executed by one or more processors, cause the one or more processors to perform acts comprising:
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detecting, by a sensing module in a multi-modal sensing surface, an increase in capacitance between electrodes at a location in a capacitive sensing electrode array in the multi-modal sensing surface; in response to detecting an increase in mutual capacitance between the electrodes at the location, distinguishing between first and second wireless tags by; selectively tuning a first RF antenna, in an array of RF antennas, to a first frequency, wherein the first RF antenna is associated with the location, and wherein the first and second wireless tags operate at the first frequency; selectively detuning a second RF antenna, in the array of RF antennas, to a second frequency different from the first frequency, wherein the second RF antenna is associated with the location; receiving, by the first RF antenna, data transmitted from the first and second wireless tags when the first RF antenna is tuned to the first frequency; selectively detuning the first RF antenna, in the array of RF antennas, to the second frequency, selectively tuning the second RF antenna, in the array of RF antennas, to the first frequency; and receiving, by the second RF antenna, data transmitted from the first wireless tag when the second RF antenna is tuned to the first frequency. - View Dependent Claims (19, 20)
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Specification