APPARATUS AND METHODS FOR DETECTING A CONDUCTIVE OBJECT AT A LOCATION
First Claim
1. A method comprising:
- determining a capacitance variation of a first sensor element and a capacitance variation of a second sensor element;
detecting a touch at a first location if the capacitance variation of the first sensor element is greater than a reference value and the capacitance variation of the second sensor element is not greater than the reference value;
detecting the touch at a second location if the capacitance variation of the first sensor element is not greater than the reference value and the capacitance variation of the second sensor element is greater than the reference value; and
detecting the touch at a third location if the capacitance variation of the first sensor element and the capacitance variation of the second sensor element are both greater than the reference value.
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Accused Products
Abstract
A method and apparatus to detect a conductive object at a location determines a capacitance variation of a first sensor element and a capacitance variation of a second sensor element. The method and apparatus detects a touch at a first location if the capacitance variation of the first sensor element is greater than a reference value and the capacitance variation of the second sensor element is not greater than the reference value. The method and apparatus detects the touch at a second location if the capacitance variation of the first sensor element is not greater than the reference value and the capacitance variation of the second sensor element is greater than the reference value. The method and apparatus detects the touch at a third location if the capacitance variation of the first sensor element and the capacitance variation of the second sensor element are both greater than the reference value.
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Citations
20 Claims
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1. A method comprising:
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determining a capacitance variation of a first sensor element and a capacitance variation of a second sensor element; detecting a touch at a first location if the capacitance variation of the first sensor element is greater than a reference value and the capacitance variation of the second sensor element is not greater than the reference value; detecting the touch at a second location if the capacitance variation of the first sensor element is not greater than the reference value and the capacitance variation of the second sensor element is greater than the reference value; and detecting the touch at a third location if the capacitance variation of the first sensor element and the capacitance variation of the second sensor element are both greater than the reference value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus comprising:
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a first sensor element; a second sensor element that is electrically isolated from the first sensor element; and a processing device coupled with the first sensor element and the second sensor element, wherein the processing device is configured to; detect a presence at a first location based on a first change in capacitance of the first sensor element; detect the presence at a second location based on a first change in capacitance of the second sensor element; and detect the presence at a third location based on a second change in capacitance of the first sensor element and a second change in capacitance of the second sensor element. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A system comprising:
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a user interface comprising a multi-dimensional sensor array, the multi-dimensional sensor array including a plurality of sensor elements; and a processing device coupled to the user interface, the processing device configured to; determine a capacitance variation of a first sensor element and a capacitance variation of a second sensor element, the first sensor element and the second sensor element of the plurality of sensor elements; detect a touch at a first location of the multi-dimensional sensor array responsive to the capacitance variation of the first sensor element being greater than a reference value and the capacitance variation of the second sensor element not being greater than the reference value; detect the touch at a second location of the multi-dimensional sensor array responsive to the capacitance variation of the first sensor element not being greater than the reference value and the capacitance variation of the second sensor element being greater than the reference value; and detect the touch at a third location of the multi-dimensional sensor array responsive to the capacitance variation of the first sensor element and the capacitance variation of the second sensor element both being greater than the reference value. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification