All points addressable touch sensing surface
First Claim
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1. An apparatus, comprising:
- a first slave controller coupled to a first capacitive touch panel comprising a first plurality of sensor elements, wherein the first slave controller is configured to;
measure a first set of capacitance values for a plurality of intersections of the first plurality of sensor elements,in response to determining that the first set of capacitance values indicates a contact not within a predetermined distance from a first edge of the first capacitive touch panel, calculate a first centroid position of the contact based on the first set of capacitance values, andin response to determining that the contact is within the predetermined distance from the first edge of the first capacitive touch panel, transmit the first set of capacitance values to a master controller; and
the master controller, coupled with the first slave controller and configured to receive the first set of capacitance values and to calculate the first centroid position of the contact based on the first set of capacitance values measured from the first capacitive touch panel and a second set of capacitance values measured from a second capacitive touch panel, wherein a space between the two capacitive touch panels is small enough such that the contact at a single location can affect capacitance values for both panels simultaneously, wherein the first and the second sets of capacitance values are measured while the contact is simultaneously affecting capacitance values for both panels, and wherein the first edge of the first capacitive touch panel is adjacent to a second edge of the second capacitive touch panel.
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Abstract
An apparatus for determining at least one centroid location for a contact at a touch-sensing surface may include a first slave controller coupled to a first capacitive touch panel comprising a first plurality of sensor elements, where the first slave controller is configured to measure a first set of capacitance values for a plurality of intersections of the first plurality of sensor elements, and a master controller coupled with the first slave controller, where the master controller is configured to receive the first set of capacitance values and calculate a first centroid position of a contact based on the first set of capacitance values and a second set of capacitance values.
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Citations
20 Claims
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1. An apparatus, comprising:
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a first slave controller coupled to a first capacitive touch panel comprising a first plurality of sensor elements, wherein the first slave controller is configured to; measure a first set of capacitance values for a plurality of intersections of the first plurality of sensor elements, in response to determining that the first set of capacitance values indicates a contact not within a predetermined distance from a first edge of the first capacitive touch panel, calculate a first centroid position of the contact based on the first set of capacitance values, and in response to determining that the contact is within the predetermined distance from the first edge of the first capacitive touch panel, transmit the first set of capacitance values to a master controller; and the master controller, coupled with the first slave controller and configured to receive the first set of capacitance values and to calculate the first centroid position of the contact based on the first set of capacitance values measured from the first capacitive touch panel and a second set of capacitance values measured from a second capacitive touch panel, wherein a space between the two capacitive touch panels is small enough such that the contact at a single location can affect capacitance values for both panels simultaneously, wherein the first and the second sets of capacitance values are measured while the contact is simultaneously affecting capacitance values for both panels, and wherein the first edge of the first capacitive touch panel is adjacent to a second edge of the second capacitive touch panel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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measuring a first set of capacitance values for a plurality of intersections of a first plurality of sensor elements in a first capacitive touch panel; in response to determining that the first set of capacitance values indicates a contact not within a predetermined distance from a first edge of the first capacitive touch panel, calculating a first centroid position of the contact based on the first set of capacitance values at a slave controller; and in response to determining that the contact is within the predetermined distance from the first edge of the first capacitive touch panel; transmitting the first set of capacitance values from the slave controller to a master controller, measuring a second set of capacitance values for a plurality of intersections of a second plurality of sensor elements in a second capacitive touch panel adjacent to the first capacitive touch panel;
wherein the first edge of the first capacitive touch panel is adjacent to a second edge of the second capacitive touch panel;receiving the first set of capacitance values and the second set of capacitance values at the master controller;
wherein a space between the two capacitive touch panels is small enough such that the contact at the single location can affect capacitance values on both panels simultaneously,wherein the first and the second sets of capacitance values are measured while the contact is simultaneously affecting capacitance values for both panels; and using the master controller to calculate the first centroid position of a contact based on the first set of capacitance values and the second set of capacitance values. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification