Coarse scan and targeted active mode scan for touch and stylus
First Claim
1. An apparatus comprising:
- a touch sensor panel comprising touch electrodes; and
processing circuitry coupled to the touch sensor panel and comprising sense channels, the processing circuitry capable of;
performing a first detection scan to identify a location of an object touching or proximate to the touch sensor panel with a coarse resolution, wherein at least one of the sense channels is connected to a first number of the touch electrodes; and
in response to identifying the location of the object with the coarse resolution, reconfiguring a connection between the touch electrodes of the touch sensor panel and the sense channels of the processing circuitry and performing a second detection scan to identify a location of the object with a fine resolution, wherein reconfiguring the connection comprises connecting the at least one of the sense channels to a second number of the touch electrodes, the second number of the touch electrodes less than the first number of the touch electrodes.
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Accused Products
Abstract
Power consumption of touch sensing operations for touch sensitive devices can be reduced by implementing a coarse scan (e.g., banked common mode scan) to coarsely detect the presence or absence of an object touching or proximate to a touch sensor panel and the results of the coarse scan can be used to dynamically adjust the operation of the touch sensitive device to perform or not perform a fine scan (e.g., targeted active mode scan). In some examples, the results of the coarse scan can be used to program a touch controller for the next touch sensing frame to idle when no touch event is detected or to perform a fine scan when one or more touch events are detected. In some examples, the results of the coarse scan can be used to abort a scheduled fine scan during the current touch sensing frame when no touch event is detected.
623 Citations
25 Claims
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1. An apparatus comprising:
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a touch sensor panel comprising touch electrodes; and processing circuitry coupled to the touch sensor panel and comprising sense channels, the processing circuitry capable of; performing a first detection scan to identify a location of an object touching or proximate to the touch sensor panel with a coarse resolution, wherein at least one of the sense channels is connected to a first number of the touch electrodes; and in response to identifying the location of the object with the coarse resolution, reconfiguring a connection between the touch electrodes of the touch sensor panel and the sense channels of the processing circuitry and performing a second detection scan to identify a location of the object with a fine resolution, wherein reconfiguring the connection comprises connecting the at least one of the sense channels to a second number of the touch electrodes, the second number of the touch electrodes less than the first number of the touch electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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at a device comprising a touch sensor panel and processing circuitry, wherein the touch sensor panel comprises touch electrodes and the processing circuitry comprises sense channels; performing a first detection scan to identify a location of an object touching or proximate to the touch sensor panel with a coarse resolution, wherein at least one of the sense channels is connected to a first number of the touch electrodes; and in response to identifying the location of the object with the coarse resolution, reconfiguring a connection between the touch electrodes of the touch sensor panel and the sense channels of the processing circuitry and performing a second detection scan to identify a location of the object with a fine resolution, wherein reconfiguring the connection comprises connecting the at least one of the sense channels to a second number of the touch electrodes, the second number of the touch electrodes less than the first number of the touch electrodes. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A non-transitory computer readable storage medium, the computer readable medium containing instructions that, when executed by processing circuitry, can perform a method, the method comprising:
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at a device comprising a touch sensor panel and the processing circuitry, wherein the touch sensor panel comprises touch electrodes and the processing circuitry comprises sense channels; performing a first detection scan to identify a location of an object touching or proximate to the touch sensor panel with a coarse resolution, wherein at least one of the sense channels is connected to a first number of the touch electrodes; and in response to identifying the location of the object with the coarse resolution, reconfiguring a connection between the touch electrodes of the touch sensor panel and the sense channels of the processing circuitry and performing a second detection scan to identify a location of the object with a fine resolution, wherein reconfiguring the connection comprises connecting the at least one of the sense channels to a second number of the touch electrodes, the second number of the touch electrodes less than the first number of the touch electrodes. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification