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US 9,753,577 B2Granted
Methods and apparatus to perform a detection operation
AssigneeParade Technologies, Ltd.
InventorsJonathan R. Peterson, Cole Wilson, Thomas Fuller
Life of this patent
Estimating the term…
Abstract
A method and apparatus determine a difference value, the determined difference value reflecting a difference between a plurality of presence values. In an embodiment, the method and apparatus perform an operation associated with the plurality of presence values, based on the determined difference value.
Claims15
A method comprising:
- at a sensing module coupled to a capacitive sense array including a first sensor element and a second sensor element that is adjacent to the first sensor element:
- obtaining a first plurality of presence values associated with a first detected touch presence of an input object, the first plurality of presence values including a first presence value and an adjacent second presence value, wherein the first presence value is associated with a change in capacitance of the first sensor element, and the second presence value is associated with a change in capacitance of the second sensor element;
- determining a reference difference value between the first presence value and the second presence value, wherein the reference difference value corresponds to the first detected touch presence of the input object associated with the first and second sensor elements;
- obtaining a second plurality of presence values associated with a second detected touch presence, the second plurality of presence values including a third presence value and an adjacent fourth presence value, wherein the third presence value is associated with a change in capacitance of the first sensor element, and the fourth presence value is associated with a change in capacitance of the second sensor element;
- determining a first difference value between the third presence value and the fourth presence value;
- computing a first level of similarity between the first difference value and the reference difference value;
- and
- when the computed first level of similarity is below a predetermined threshold level of similarity, performing one or more operations selected from the group consisting of:
- filtering out, as noise, at least one presence value of the second plurality of presence values, and modifying at least one presence value of the second plurality of presence values.
6 more elements
A sensing module coupled to a capacitive sense array including a first sensor element and a second sensor element that is adjacent to the first sensor element, comprising:
- a difference module configured to:
- obtain a first plurality of presence values associated with a first detected touch presence of an input object, the first plurality of presence values including a first presence value and an adjacent second presence value, wherein the first presence value is associated with a change in capacitance of the first sensor element, and the second presence value is associated with a change in capacitance of the second sensor element;
- and
- determine a reference difference value between the first presence value and the second presence value, wherein the reference difference value corresponds to the first detected touch presence of the input object associated with the first and second elements;
- obtain a second plurality of presence values associated with a second detected touch presence, the second plurality of presence values including a third presence value and an adjacent fourth presence value, wherein the third presence value is associated with a change in capacitance of the first sensor element, and the fourth presence value is associated with a change in capacitance of the second sensor element;
- and
- determine a first difference value between the third presence value and the fourth presence value;
- a presence evaluator configured to:
- obtain the reference difference value corresponding to the first detected touch presence associated with the first and second sensor elements;
- and
- compute a first level of similarity between the first difference value and the reference difference value;
- and
- a presence adjustor configured to perform one or more operations when the computed first level of similarity is below a predetermined threshold level of similarity, wherein the one or more operations are selected from the group consisting of:
- filtering out, as noise, at least one presence value of the second plurality of presence values, and modifying at least one presence value of the second plurality of presence values.
11 more elements
A sensing system comprising:
- a processing device;
- a memory coupled with the processing device;
- and
- a capacitive sense array including a first sensor element and a second sensor element that is adjacent to the first sensor element, the capacitive sense array coupled with the processing device, the processing device comprising:
- a difference module configured to:
- obtain a first plurality of presence values associated with a first detected touch presence of an input object, the first plurality of presence values including a first presence value and an adjacent second presence value, wherein the first presence value is associated with a change in capacitance of the first sensor element, and the second presence value is associated with a change in capacitance of the second sensor element;
- and
- determine a reference difference value between the first presence value and the second presence value, wherein the reference difference value corresponds to the first detected touch presence of the input object associated with the first and second elements;
- obtain a second plurality of presence values associated with a second detected touch presence, the second plurality of presence values including a third presence value and an adjacent fourth presence value, wherein the third presence value is associated with a change in capacitance of the first sensor element, and the fourth presence value is associated with a change in capacitance of the second sensor element;
- determine a first difference value between the third presence value and the fourth presence value;
- a presence evaluator configured to:
- obtain the reference difference value corresponding to the first detected touch presence associated with the first and second sensor elements;
- and
- compute a first level of similarity between the first difference value and the reference difference value;
- and
- a presence adjustor configured to perform one or more operations when the computed first level of similarity is below a predetermined threshold level of similarity, wherein the one or more operations are selected from the group consisting of:
- filtering out, as noise, at least one presence value of the second plurality of presence values, and modifying at least one presence value of the second plurality of presence values.
14 more elements
Dependencies are inferred from the claim text.