All points addressable touch sensing surface
First Claim
Patent Images
1. An apparatus, comprising:
- a first controller and a second controller coupled to the first controller, wherein;
the apparatus is coupled to a touch-sensing surface including a first area and a second area that are adjacent to each other, the first area including a first subset of sensor elements, and the second area including a second subset of sensor elements;
the first controller is configured to;
measure a first set of capacitance values associated with the first subset of sensor elements;
in response to determining that a contact has occurred within a predetermined distance from an edge of the first area, provide the first set of capacitance values to the second controller; and
in response to determining that a contact has occurred in the first area at a location having at least the predetermined distance from the edge, calculate a centroid position of the contact based on the first set of capacitance values and provide the centroid position to the second controller; and
the second controller is configured to;
in accordance with receiving the first set of capacitance values from the first controller, calculate the centroid position of the contact at the touch-sensing surface based on the first set of capacitance values and a second set of capacitance values, wherein the second set of capacitance values are measured from the second subset of sensor elements of the second area, and the first set of capacitance values and the second set of capacitance values are normalized.
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Abstract
A touch-sensing apparatus may include a first controller configured to measure a first set of capacitance values from a first area of a touch-sensing surface and a second controller coupled with the first controller, where the second controller is configured to receive the first set of capacitance values from the first controller, and calculate a first position of a contact at the touch-sensing surface based on the first set of capacitance values and a second set of capacitance values measured from a second area of the touch-sensing surface adjacent to the first area of the touch-sensing surface.
66 Citations
20 Claims
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1. An apparatus, comprising:
a first controller and a second controller coupled to the first controller, wherein; the apparatus is coupled to a touch-sensing surface including a first area and a second area that are adjacent to each other, the first area including a first subset of sensor elements, and the second area including a second subset of sensor elements; the first controller is configured to; measure a first set of capacitance values associated with the first subset of sensor elements; in response to determining that a contact has occurred within a predetermined distance from an edge of the first area, provide the first set of capacitance values to the second controller; and in response to determining that a contact has occurred in the first area at a location having at least the predetermined distance from the edge, calculate a centroid position of the contact based on the first set of capacitance values and provide the centroid position to the second controller; and the second controller is configured to; in accordance with receiving the first set of capacitance values from the first controller, calculate the centroid position of the contact at the touch-sensing surface based on the first set of capacitance values and a second set of capacitance values, wherein the second set of capacitance values are measured from the second subset of sensor elements of the second area, and the first set of capacitance values and the second set of capacitance values are normalized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method, comprising:
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at a first controller coupled to a touch-sensing surface, wherein the touch-sensing surface includes a first area and a second area that are adjacent to each other, the first area includes a first subset of sensor elements, and the second area includes a second subset of sensor elements; measuring a first set of capacitance values associated with the first subset of sensor elements; in response to determining that a contact has occurred within a predetermined distance from an edge of the first area based on the first set of capacitance values, providing the first set of capacitance values to a second controller; and in response to determining that a contact has occurred in the first area at a location having at least the predetermined distance from the edge, calculating a centroid position of the contact based on the first set of capacitance values and providing the centroid position to the second controller; and at the second controller, which is coupled to the touch-sensing surface; in accordance with receiving from the first controller a first set of capacitance values measured from the first area of a touch-sensing surface, calculating the centroid position of the contact at the touch-sensing surface based on the first set of capacitance values and the second set of capacitance values, wherein the second set of capacitance values are measured from the second subset of sensor elements of the second area, and the first set of capacitance values and the second set of capacitance values are normalized. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system, comprising:
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a touch-sensing surface including a first area and a second area that are adjacent to each other, wherein the first area includes a first subset of sensor elements and the second area includes a second subset of sensor elements; a first controller coupled with the touch-sensing surface; and a second controller coupled with the touch-sensing surface; wherein; the first controller is configured to; in response to determining that a contact has occurred within a predetermined distance from an edge of the first area, provide the first set of capacitance values to the second controller; and in response to determining that a contact has occurred in the first area at a location having at least the predetermined distance from the edge, calculate a centroid position of the contact based on the first set of capacitance values and provide the centroid position to the second controller; and the second controller is configured to; in accordance with receiving the first set of capacitance values from the first controller, calculate the centroid position of the contact at the touch-sensing surface based on the first set of capacitance values and a second set of capacitance values, wherein the second set of capacitance values are measured from the second subset of sensor elements of the second area, and the first set of capacitance values and the second set of capacitance values are normalized. - View Dependent Claims (18, 19, 20)
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Specification