MULTI-TOUCH INTEGRITY SENSING FOR CAPACITIVE TOUCH SCREEN
First Claim
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1. A method of touch island integrity checking, comprising:
- identifying a first set of touched nodes of a capacitive sensing panel by a first mode of operation;
identifying a second set of touched nodes of the capacitive sensing panel by a second mode of operation;
creating a processing mask based on the second set of touched nodes;
classifying all nodes of the first set of touched nodes in response to the processing mask; and
indicating a processing status comprising one of a success state and a failure state in response to the classifying.
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Abstract
A method for multi-touch integrity sensing for a multi-touch capacitive touch screen is disclosed. By determining the integrity of touches, a distinction is identified between wanted touches, such as via a finger or stylus, and unwanted touches such as via foreign matter, errors, and the like.
13 Citations
20 Claims
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1. A method of touch island integrity checking, comprising:
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identifying a first set of touched nodes of a capacitive sensing panel by a first mode of operation; identifying a second set of touched nodes of the capacitive sensing panel by a second mode of operation; creating a processing mask based on the second set of touched nodes; classifying all nodes of the first set of touched nodes in response to the processing mask; and indicating a processing status comprising one of a success state and a failure state in response to the classifying. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of touch island integrity checking, comprising:
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identifying mutual capacitance touched nodes of a capacitive sensing panel by a mutual capacitance mode; identifying self-capacitance touched nodes of the capacitive sensing panel by a self-capacitance mode; creating a node mapping overlay based on self-capacitance touched nodes; mapping mutual capacitance touched nodes into touch islands according to the node mapping overlay; and confirming a touch island integrity in response to the mapping. - View Dependent Claims (13, 14)
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15. A touch screen controller, comprising:
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a node identification engine configured to identify a first set of touched nodes of a capacitive sensing panel by a first mode of operation and to identify a second set of touched nodes of the capacitive sensing panel by a second mode of operation; a mask generation engine configured to create a processing mask based on the second set of touched nodes; a node classification engine configured to classify the nodes of the first set of touched nodes in response to the processing mask; and a classified node processing engine configured to indicate a processing status comprising one of a success state and a failure state in response to the classifying. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification