Capacitive sensing without a baseline
First Claim
1. A processing system for a capacitive sensing device, comprising:
- a sensor module coupled to a plurality of sensor electrodes and configured to receive a first plurality of resulting signals from the plurality sensor electrodes,wherein the first plurality of resulting signals reflect self-capacitances of the plurality of sensor electrodes, andwherein the plurality of sensor electrodes comprises a first sensor electrode, a second sensor electrode adjacent to the first second electrode, a third sensor electrode adjacent to the first sensor electrode and the second sensor electrode, and a fourth sensor electrode adjacent to the third sensor electrode; and
a determination module configured to;
determine, based on the first plurality of resulting signals, first differential capacitive sensing data between the first sensor electrode and the second sensor electrode,wherein the first differential capacitive sensing data is a difference between the self-capacitance of first sensor electrode and the self-capacitance of the second sensor electrode;
determine, based on the first plurality of resulting signals, second differential capacitive sensing data between the third sensor electrode and the fourth sensor electrode,wherein the second differential capacitive sensing data is a difference between the self-capacitance of the third sensor electrode and the self-capacitance of the fourth sensor electrode; and
determine user contact information based on at least one of the first differential capacitive sensing data and the second differential capacitive sensing data.
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Accused Products
Abstract
A processing system for a capacitive sensing device, including: a sensor module coupled to multiple sensor electrodes and configured to receive multiple resulting signals from the multiple sensor electrodes, where the multiple electrodes includes a first sensor electrode, a second sensor electrode adjacent to the first second electrode, a third sensor electrode adjacent to the first sensor electrode and the second sensor electrode, and a fourth sensor electrode adjacent to the third sensor electrode; and a determination module configured to: determine, based on the multiple resulting signals, first differential capacitive sensing data between the first sensor electrode and the second sensor electrode; determine, based on the multiple resulting signals, second differential capacitive sensing data between the third sensor electrode and the fourth sensor electrode; and determine user contact information based on at least one of the first differential capacitive sensing data and the second differential capacitive sensing data.
27 Citations
19 Claims
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1. A processing system for a capacitive sensing device, comprising:
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a sensor module coupled to a plurality of sensor electrodes and configured to receive a first plurality of resulting signals from the plurality sensor electrodes, wherein the first plurality of resulting signals reflect self-capacitances of the plurality of sensor electrodes, and wherein the plurality of sensor electrodes comprises a first sensor electrode, a second sensor electrode adjacent to the first second electrode, a third sensor electrode adjacent to the first sensor electrode and the second sensor electrode, and a fourth sensor electrode adjacent to the third sensor electrode; and a determination module configured to; determine, based on the first plurality of resulting signals, first differential capacitive sensing data between the first sensor electrode and the second sensor electrode, wherein the first differential capacitive sensing data is a difference between the self-capacitance of first sensor electrode and the self-capacitance of the second sensor electrode; determine, based on the first plurality of resulting signals, second differential capacitive sensing data between the third sensor electrode and the fourth sensor electrode, wherein the second differential capacitive sensing data is a difference between the self-capacitance of the third sensor electrode and the self-capacitance of the fourth sensor electrode; and determine user contact information based on at least one of the first differential capacitive sensing data and the second differential capacitive sensing data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for operating a capacitive sensing device, comprising:
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receiving a plurality of resulting signals from a plurality of sensor electrodes, wherein the first plurality of resulting signals reflect self-capacitance values of the plurality of sensor electrodes, and wherein the plurality of sensor electrodes comprises a first sensor electrode, a second sensor electrode adjacent to the first second electrode, a third sensor electrode adjacent to the first sensor electrode and the second sensor electrode, and a fourth sensor electrode adjacent to the third sensor electrode; determining, based the first plurality of resulting signals, first differential capacitive sensing data between the first sensor electrode and the second sensor electrode, wherein the first differential capacitive sensing data is a difference between the self-capacitance of first sensor electrode and the self-capacitance of the second sensor electrode; determining, based on the first plurality of resulting signals, second differential capacitive sensing data between the third sensor electrode and the fourth sensor electrode, wherein the second differential capacitive sensing data is a difference between the self-capacitance of the third sensor electrode and the self-capacitance of the fourth sensor electrode; and determining user contact information based on at least one of the first differential capacitive sensing data and the second differential capacitive sensing data. - View Dependent Claims (10, 11, 12, 13)
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14. An input device, comprising:
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a plurality of sensor electrodes comprising; a first sensor electrode; a second sensor electrode adjacent to the first second electrode; a third sensor electrode adjacent to the first sensor electrode and the second sensor electrode; and a fourth sensor electrode adjacent to the third sensor electrode; and a processing system operatively connected to the plurality of sensor electrodes and configured to; receive a first plurality of resulting signals from the plurality sensor electrodes, wherein the first plurality of resulting signals reflect self-capacitance values of the plurality of sensor electrodes; determine, based the first plurality of resulting signals, first differential capacitive sensing data between the first sensor electrode and the second sensor electrode, wherein the first differential capacitive sensing data is a difference between the self-capacitance of first sensor electrode and the self-capacitance of the second sensor electrode; determine, based on the first plurality of resulting signals, second differential capacitive sensing data between the third sensor electrode and the fourth sensor electrode, wherein the second differential capacitive sensing data is a difference between the self-capacitance of the third sensor electrode and the self-capacitance of the fourth sensor electrode; and determine user contact information based on at least one of the first differential capacitive sensing data and the second differential capacitive sensing data. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification