Fast multi-touch sensor with user identification techniques
First Claim
1. A method for distinguishing between sources of simultaneous touch events on a touch sensitive device, the touch sensitive device comprising a plurality of row conductors and a plurality of column conductors, the path of each of the row conductors crossing the path of each of the column conductors, the method comprising:
- simultaneously transmitting each of a plurality of orthogonal row signals on a respective one of at least some of the plurality of row conductors;
detecting an amount of each of the plurality of orthogonal row signals present on each of the plurality of column conductors;
identifying the simultaneous touch events on the touch sensitive device using the detected amount of each of the plurality of orthogonal row signals, respective locations of the simultaneous touch events being determined based on the detected amount of each of the plurality of orthogonal row signals being detected with a certain amount on a respective one of the plurality of column conductors; and
associating at least two of the plurality of simultaneous touch events with a discrete source, the associating based on body-transmitted cross talk of at least one of each of the plurality of orthogonal row signals identified based on the detected amount of the at least one of each of the plurality of orthogonal row signals being present on a respective one of the plurality of column conductors in an amount that is weaker than the certain amount,wherein the at least two simultaneous touch events are associated with touch events coming from a same hand of a same user when the detected amount is weaker than the certain amount and stronger than another amount, and the at least two simultaneous touch events are not associated with touch events coming from the same hand of the same user when the detected amount is weaker than the another amount.
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Accused Products
Abstract
A method and system for distinguishing between sources of simultaneous touch events on a touch sensitive device with row conductors and column conductors, the path of each of the row conductors crossing the path of each of the column conductors. Each of a plurality of orthogonal row signals are simultaneously transmitted on a respective one of at least some of the plurality of row conductors. An amount of each of the orthogonal row signals present on each of the plurality of column conductors is detected, and the touch events are identified using the detected amount. Each of the simultaneous touch events is associated with a discrete source based on the detected amount of each of the plurality of orthogonal row signals.
15 Citations
50 Claims
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1. A method for distinguishing between sources of simultaneous touch events on a touch sensitive device, the touch sensitive device comprising a plurality of row conductors and a plurality of column conductors, the path of each of the row conductors crossing the path of each of the column conductors, the method comprising:
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simultaneously transmitting each of a plurality of orthogonal row signals on a respective one of at least some of the plurality of row conductors; detecting an amount of each of the plurality of orthogonal row signals present on each of the plurality of column conductors; identifying the simultaneous touch events on the touch sensitive device using the detected amount of each of the plurality of orthogonal row signals, respective locations of the simultaneous touch events being determined based on the detected amount of each of the plurality of orthogonal row signals being detected with a certain amount on a respective one of the plurality of column conductors; and associating at least two of the plurality of simultaneous touch events with a discrete source, the associating based on body-transmitted cross talk of at least one of each of the plurality of orthogonal row signals identified based on the detected amount of the at least one of each of the plurality of orthogonal row signals being present on a respective one of the plurality of column conductors in an amount that is weaker than the certain amount, wherein the at least two simultaneous touch events are associated with touch events coming from a same hand of a same user when the detected amount is weaker than the certain amount and stronger than another amount, and the at least two simultaneous touch events are not associated with touch events coming from the same hand of the same user when the detected amount is weaker than the another amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for distinguishing between sources of simultaneous touch events on or near a touch sensitive device, the touch sensitive device comprising a plurality of row conductors and a plurality of column conductors, the path of each of the row conductors crossing the path of each of the column conductors, the method comprising:
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simultaneously transmitting an orthogonal row signal on each of the plurality of row conductors; detecting an amount of each of the transmitted orthogonal row signals associated with each of the plurality of row conductors present on each of the plurality of column conductors; using the detected amount of each of the transmitted orthogonal row signals associated with each of the plurality of row conductors to identify a plurality of simultaneous touch events on the touch sensitive device, respective locations of the simultaneous touch events being determined based on the detected amount of each of the transmitted orthogonal row signals being detected with a certain amount on a respective one of the plurality of column conductors; and using detection of body-transmitted cross talk in the detected amount of each of the transmitted orthogonal row signals associated with each of the plurality of row conductors to associate at least two of the plurality of simultaneous touch events as coming from a discrete source, the body-transmitted cross talk identified based on the detected amount of each of the transmitted orthogonal row signals being present on a respective one of the plurality of column conductors in an amount that is weaker than the certain amount, wherein the at least two simultaneous touch events are associated with touch events coming from a same hand of a same user when the detected amount is weaker than the certain amount and stronger than another amount, and the at least two simultaneous touch events are not associated with touch events coming from the same hand of the same user when the detected amount is weaker than the another amount. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for distinguishing between sources of simultaneous touch events on a touch sensitive device, the touch sensitive device comprising a plurality of row conductors and a plurality of column conductors, the path of each of the row conductors crossing the path of each of the column conductors, the method comprising:
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simultaneously transmitting each of a plurality of orthogonal row signals on a respective one of at least some of the plurality of row conductors; detecting an amount of each of the plurality of orthogonal row signals present on each of the plurality of column conductors; identifying the simultaneous touch events on the touch sensitive device using the detected amount of each of the plurality of orthogonal row signals, respective locations of the simultaneous touch events being determined based on the detected amount of each of the plurality of orthogonal row signals being detected with a certain amount on a respective one of the plurality of column conductors; and associating at least two of the plurality of simultaneous touch events with a discrete source, the associating based on body-transmitted cross talk of at least one of each of the plurality of orthogonal row signals identified based on the detected amount of the at least one of each of the plurality of orthogonal row signals being present on a respective one of the plurality of column conductors in an amount that is weaker than the certain amount, wherein the at least two simultaneous touch events are associated with touch events coming from a same user when the detected amount is weaker than the certain amount and stronger than another amount, and the at least two simultaneous touch events are not associated with touch events coming from the same user when the detected amount is weaker than the another amount. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A method for distinguishing between sources of simultaneous touch events on or near a touch sensitive device, the touch sensitive device comprising a plurality of row conductors and a plurality of column conductors, the path of each of the row conductors crossing the path of each of the column conductors, the method comprising:
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simultaneously transmitting an orthogonal row signal on each of the plurality of row conductors; detecting an amount of each of the transmitted orthogonal row signals associated with each of the plurality of row conductors present on each of the plurality of column conductors; using the detected amount of each of the transmitted orthogonal row signals associated with each of the plurality of row conductors to identify a plurality of simultaneous touch events on the touch sensitive device, respective locations of the simultaneous touch events being determined based on the detected amount of each of the transmitted orthogonal row signals being detected with a certain amount on a respective one of the plurality of column conductors; and using detection of body-transmitted cross talk in the detected amount of each of the transmitted orthogonal row signals associated with each of the plurality of row conductors to associate at least two of the plurality of simultaneous touch events as coming from a discrete source, the body-transmitted cross talk identified based on the detected amount of each of the transmitted orthogonal row signals being present on a respective one of the plurality of column conductors in an amount that is weaker than the certain amount, wherein the at least two simultaneous touch events are associated with touch events coming from a same user when the detected amount is weaker than the certain amount and stronger than another amount, and the at least two simultaneous touch events are not associated with touch events coming from the same user when the detected amount is weaker than the another amount. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50)
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Specification