Method and apparatus for eliminating tail effect in touch applications
First Claim
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1. A device comprising:
- a sensor configured to obtain a plurality of measurements from a sensor array in a scan operation when the sensor array is in an unsettled state after a previous scan operation, wherein the plurality of measurements are representative of a conductive object that is proximate to a touch-sensing surface of the sensor array, and wherein the sensor array comprises a plurality of transmit electrodes and a plurality of receive electrodes; and
a processing logic coupled with the sensor, wherein the processing logic is configured at least to;
determine a set of adjustment values that correspond to a tail effect associated with the conductive object represented by the plurality of measurements;
wherein adjustment values for a particular receive electrode are computed based on a sum of indices of transmit electrodes along the particular receive electrode; and
generate adjusted measurements corresponding to the plurality of measurements based on the set of adjustment values.
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Abstract
Techniques for eliminating tail effect are described herein. In an example embodiment, a device comprises a sensor coupled with a processing logic. The sensor is configured to measure a plurality of measurements from a sensor array when the sensor array is in an unsettled state, where the measurements represent a conductive object that is proximate to a touch-sensing surface of the sensor array. The processing logic is configured to determine a set of adjustment values that correspond to a tail effect associated with the plurality of measurements, and to generate adjusted measurements corresponding to the plurality of measurements based on the set of adjustment values.
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Citations
20 Claims
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1. A device comprising:
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a sensor configured to obtain a plurality of measurements from a sensor array in a scan operation when the sensor array is in an unsettled state after a previous scan operation, wherein the plurality of measurements are representative of a conductive object that is proximate to a touch-sensing surface of the sensor array, and wherein the sensor array comprises a plurality of transmit electrodes and a plurality of receive electrodes; and a processing logic coupled with the sensor, wherein the processing logic is configured at least to; determine a set of adjustment values that correspond to a tail effect associated with the conductive object represented by the plurality of measurements; wherein adjustment values for a particular receive electrode are computed based on a sum of indices of transmit electrodes along the particular receive electrode; and generate adjusted measurements corresponding to the plurality of measurements based on the set of adjustment values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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receiving a plurality of measurements from a sensor array in a scan operation when the sensor array is in an unsettled state after a previous scan operation, wherein the plurality of measurements are representative of a conductive object that is proximate to the sensor array, and wherein the sensor array comprises a plurality of transmit electrodes and a plurality of receive electrodes; a processing device determining a set of adjustment values that correspond to a tail effect associated with the conductive object represented by the plurality of measurements; wherein adjustment values for a particular receive electrode are computed based on a sum of indices of transmit electrodes along the particular receive electrode; and generating adjusted measurements corresponding to the plurality of measurements based on the set of adjustment values. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A system comprising:
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a capacitive sensor array comprising a plurality of sensor elements formed by a plurality of transmit electrodes and a plurality of receive electrodes; a capacitive sensor coupled with the capacitive sensor array, the capacitive sensor configured to measure a plurality of measurements from the plurality of sensor elements in a scan operation when the sensor array is in an unsettled state after a previous scan operation, wherein the plurality of measurements are representative of a conductive object that is proximate to the capacitive sensor array; and a processing logic coupled with the capacitive sensor, wherein the processing logic is configured at least to; determine a set of adjustment values that correspond to a tail effect associated with the conductive object represented by the plurality of measurements; wherein adjustment values for a particular receive electrode are computed based on a sum of indices of transmit electrodes along the particular receive electrode; and generate adjusted measurements corresponding to the plurality of measurements based on the set of adjustment values. - View Dependent Claims (18, 19, 20)
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Specification