SCAN SEQUENCE GENERATOR
First Claim
1. A method of detecting events with a touch sensor panel device comprising:
- applying stimulation signals having multiple different frequencies to a first touch sensing node of the touch sensor panel device to detect a position of an object touching the touch sensor panel device at or near the first touch sensing node;
sensing an output of the first touch sensing node for each frequency of the stimulation signal that was applied to the first touch sensing node to thereby provide multiple outputs;
utilizing the multiple outputs to determine the position of touch, near touch or hover location on the touch sensor panel device; and
selecting at least one of the multiple different frequencies based on a noise environment.
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Abstract
A sensor panel device that can generate and use a stimulus signal having multiple different waveforms for detecting events on or near the sensor panel is disclosed. Among other things, such a stimulus signal can be used to reject environmental noise present in the device. In some embodiments, the stimulus signal has multiple waveforms having different frequencies. Logic circuitry can generate representative values from output of the different waveforms applied to one or more sensing nodes in the sensor panel device. From the representative values, a final value can be generated that represents whether an event occurred at or near the one or more sensing nodes.
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Citations
38 Claims
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1. A method of detecting events with a touch sensor panel device comprising:
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applying stimulation signals having multiple different frequencies to a first touch sensing node of the touch sensor panel device to detect a position of an object touching the touch sensor panel device at or near the first touch sensing node; sensing an output of the first touch sensing node for each frequency of the stimulation signal that was applied to the first touch sensing node to thereby provide multiple outputs; utilizing the multiple outputs to determine the position of touch, near touch or hover location on the touch sensor panel device; and selecting at least one of the multiple different frequencies based on a noise environment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 36, 37)
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10. A sensor panel device comprising:
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an event sensitive panel having at least one sense node; output circuitry operatively connected to the at least one sense node that generates stimulus signals having multiple different frequencies, at least one of the multiple different outputs based on a noise environment of the touch sensor, the sensing node providing multiple outputs in response to the multiple different frequencies for at least one event to detect a position of touching of the sensor panel or nearly touching the sensor panel; and input circuitry operatively connected to the at least one sense node to receive the multiple outputs, the input circuitry configured to measure the results of any stimulus signals applied to the at least one sense node to determine a position of touch or near touch based on all or a plurality of the received multiple outputs. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of acquiring an image of a sensor panel device having a plurality of event sensors, comprising:
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selecting at least a first and a second stimulus signal, at least one of the first and second stimulus signal based on a noise environment of the sensor panel; applying the first stimulus signal having a first frequency to a first event sensor; receiving a first stimulus result comprising an output of the first event sensor to which the first stimulus signal was applied; applying the second stimulus signal having a second frequency to the first event sensor; receiving a second stimulus result comprising an output of the first event sensor to which the second stimulus signal was applied; the first and second frequencies different from one another and applied to the first event sensor to detect at least one of a touch, near touch, or hover event; generating a final value of the first event sensor based at least on the first and second stimulus results. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. An apparatus for detecting events on a sensor panel device having a sensor panel surface, the sensor panel device having a plurality of drive electrodes and a plurality of sense electrodes and capacitive sensing nodes at the intersection of the drive and sense electrodes, each capacitive sensing node formed by the intersection of a single drive line and a single sense line, the apparatus comprising:
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a plurality of sensors configured to detect one or more events each sensor comprising a capacitive sensing node; output circuitry operatively connected to the plurality of sensors, the output circuitry configured to generate stimulus signals having predetermined waveforms, the stimulus signals based on a noise environment of the sensor panel device, at least some of the predetermined waveforms having different frequencies, each sensor providing a plurality of different outputs corresponding to the different frequencies to detect the events; and one or more analog channels operatively connected to the plurality of sensors, the one or more analog channels configured to generate distinct values representative of events occurring at distinct locations each distinct value based on the plurality of different outputs for each sensor. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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31. A method for detecting events on or about a touch sensitive surface, comprising:
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scanning an event sensor panel of event sensors organized in rows and columns by applying a stimulus having multiple different frequencies to one of the rows or columns, the stimulus being applied to detect a touching or near touching of an object on or over the touch sensitive surface, and the multiple different frequencies based on a noise environment of the touch sensor; during each event sensor panel scan of the rows or columns, coupling the other of the rows or columns of the event sensor panel to one or more analog channels to generate plural output values for the different frequencies representative of one or more events occurring at distinct locations at about the same time along the row or column being scanned; and determining a final output value based on all or a plurality of the plural output values. - View Dependent Claims (32, 33, 34, 35)
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38. An apparatus for detecting events on a sensor panel device having a sensor panel surface, the sensor panel device having a plurality of drive electrodes and a plurality of sense electrodes and capacitive sensing nodes at the intersection of the drive and sense electrodes, each capacitive sensing node formed by the intersection of a single drive line and a single sense line, the apparatus comprising:
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a plurality of sensors configured to detect one or more events each sensor comprising a capacitive sensing node; output circuitry operatively connected to the plurality of sensors, the output circuitry configured to generate stimulus signals having predetermined waveforms, the stimulus signals based on a previous noise data of the sensor panel device, at least some of the predetermined waveforms having different frequencies, each sensor providing a plurality of different outputs corresponding to the different frequencies to detect the events; and one or more analog channels operatively connected to the plurality of sensors, the one or more analog channels configured to generate distinct values representative of events occurring at distinct locations each distinct value based on the plurality of different outputs for each sensor.
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Specification