MULTI-TOUCH AUTO SCANNING
First Claim
1. A touch surface device, comprising:
- a sensor panel having at least one sense node that provides an output signal indicative of an occurrence or absence of an event occurring at the panel;
a processor operatively connected to the panel, the processor capable of processing the output signal of the panel; and
auto-scan logic circuitry operatively connected to the sensor panel and the processor, the auto-scan logic circuitry capable of determining the occurrence or absence of an event occurring at the panel without intervention from the processor.
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Accused Products
Abstract
A system and method for autonomously scanning a sensor panel device, is disclosed. A sensor panel processor can be disabled after a first predetermined amount of time has elapsed without the sensor panel device sensing any events. One or more system clocks can also be disabled to conserve power. While the processor and one or more system clocks are disabled, the sensor panel device can periodically autonomously scan the sensor panel for touch activity. If one or more results from the autonomous scans exceed a threshold, the sensor panel device re-enables the processor and one or more clocks to actively scan the sensor panel. If the threshold is not exceeded, then the sensor panel device continues to periodically autonomously scan the sensor panel without intervention from the processor. The sensor panel device can periodically perform calibration functions to account for any drift that may be present in the system.
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Citations
47 Claims
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1. A touch surface device, comprising:
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a sensor panel having at least one sense node that provides an output signal indicative of an occurrence or absence of an event occurring at the panel; a processor operatively connected to the panel, the processor capable of processing the output signal of the panel; and auto-scan logic circuitry operatively connected to the sensor panel and the processor, the auto-scan logic circuitry capable of determining the occurrence or absence of an event occurring at the panel without intervention from the processor. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
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2. The touch device of claim 2, wherein the auto-scan logic circuitry enters an auto-scan mode when no event is sensed on the panel for a predetermined amount of time.
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11. An apparatus for generating an image of an event at a sensitive surface, comprising:
auto-scan logic circuitry couplable to a sensor panel, the auto-scan logic circuitry capable of performing, without intervention from a sensor processor, an auto-scan sequence after a first predetermined amount of time has been exceeded. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for scanning a sensor panel, comprising:
initiating an auto-scan mode after one or more touch events have not been sensed on a sensor panel for a first predetermined amount of time, the auto-scan mode comprising; a) disabling a sensor panel processor; b) performing a sniff scan when a second predetermined amount of time has been exceeded; and c) performing a calibration scan when a third predetermined amount of time has been exceeded. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. An apparatus for sensing an event on a sensor panel, comprising:
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means for providing an output signal indicative of an occurrence or absence of an event on a panel; means for performing an auto-scan mode after a first predetermined amount of time has been exceeded; and means for performing a sniff mode after a second predetermined amount of time has been exceeded. - View Dependent Claims (36)
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37. A mobile telephone comprising:
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a sensor panel having at least one sense node that provides an output signal indicative of an occurrence or absence of an event occurring at the panel; a processor operatively connected to the panel, the processor capable of processing the output signal of the panel; and auto-scan logic circuitry operatively connected to the sensor panel and the processor, the auto-scan logic circuitry capable of determining the occurrence or absence of an event occurring at the panel without intervention from the processor. - View Dependent Claims (38, 39, 40, 41, 42, 43)
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44. A multi-event sensitive device comprising:
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a sensor panel having a plurality of sense nodes that provide output signals indicative of an occurrence or absence of an event occurring at the panel; and auto-scan logic circuitry operatively connected to the sensor panel, the auto-scan logic circuitry capable of determining the occurrence or absence of an event occurring at the panel, the auto-scan logic comprising noise management circuitry configured to differentiate between an occurrence of an event and noise present in the device. - View Dependent Claims (45, 46, 47)
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Specification