Multiple touch detection
First Claim
Patent Images
1. A method comprising:
- scanning a touch sensor array to generate sensor element signals corresponding to each of a plurality of sensor elements of the touch sensor array;
identifying a sensor window including a first signal value of a first sensor element, of the plurality of sensor elements, and a second signal value of a second sensor element adjacent to the first sensor element;
detecting a slope by determining whether the second signal value is greater than the first signal value;
shifting the sensor window according to the detected slope, said shifting causing the sensor window to include a third signal value of a third sensor element of the plurality of sensor elements, wherein the third sensor element is different from the first sensor element and different from the second sensor element; and
locating the presence of the conductive object at the touch sensor array by locating a change in slope.
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Abstract
An apparatus for and method of detecting multiple presences on a touch sensor device are described.
56 Citations
19 Claims
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1. A method comprising:
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scanning a touch sensor array to generate sensor element signals corresponding to each of a plurality of sensor elements of the touch sensor array; identifying a sensor window including a first signal value of a first sensor element, of the plurality of sensor elements, and a second signal value of a second sensor element adjacent to the first sensor element; detecting a slope by determining whether the second signal value is greater than the first signal value; shifting the sensor window according to the detected slope, said shifting causing the sensor window to include a third signal value of a third sensor element of the plurality of sensor elements, wherein the third sensor element is different from the first sensor element and different from the second sensor element; and locating the presence of the conductive object at the touch sensor array by locating a change in slope. - View Dependent Claims (2, 3, 4)
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5. An apparatus, comprising:
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a touch sensor array having a plurality of sensor elements; and a processing device operatively coupled to the touch sensor array and configured to; scan a touch sensor array to generate sensor element signals corresponding to each of a plurality of sensor elements of the touch sensor array; identify a sensor window including a first signal value of a first sensor element, of the plurality of sensor elements, and a second signal value of a second sensor element adjacent to the first sensor element; detect a slope by determining whether the second signal value is greater than the first signal value; shift the sensor window according to the detected slope said shifting causing the sensor window to include a third signal value of a third sensor element of the plurality of sensor elements, wherein the third sensor element is different from the first sensor element and different from the second sensor element; and locating a presence of a conductive object at the touch sensor array by locating a change in slope. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method comprising:
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determining a slope based on compared signal values of sensor elements within a sensor window including a first sensor element, of a plurality of sensor elements in a touch sensor array, and a second sensor element in the touch sensor array adjacent to the first sensor element; shifting the sensor window according to determined slope, said shifting causing the sensor window to include a third sensor element of the plurality of sensor elements, wherein the third sensor element is different from the first sensor element and different from the second sensor element; and locating the presence of the conductive object at the touch sensor array by locating a change in slope. - View Dependent Claims (16, 17, 18, 19)
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Specification