Touch systems and methods including rejection of unintentional touch signals
First Claim
1. A method of determining a touch location on a touch surface of a touch panel comprising a matrix of intersecting electrodes with nodes at intersections of the electrodes, the method comprising:
- discriminating between one or more intentional touches and one or more unintentional touches on the touch surface using first criteria; and
for each touch identified as an intentional touch, discriminating between a finger touch and a pen touch using second criteria, wherein discriminating between the finger touch and the pen test comprises identifying the touch as a pen touch if a distance between a touch and a profile of a previously identified intentional or unintentional touch is greater than a distance threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
A touch sensor can be used with a finger and/or a pen configured to provide a touch input to the touch sensor. Some implementations involve touch capacitive touch sensing, although many implementations are also applicable to other touch and pen technologies, such as resistive, surface acoustic wave, bending wave, touch force, electromagnetic (E-M). Discrimination between intentional touches and unintentional touches on the touch surface can be performed using first criteria. For each touch identified as an intentional touch, discrimination between a finger touch and a pen touch can be performed using second criteria.
14 Citations
14 Claims
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1. A method of determining a touch location on a touch surface of a touch panel comprising a matrix of intersecting electrodes with nodes at intersections of the electrodes, the method comprising:
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discriminating between one or more intentional touches and one or more unintentional touches on the touch surface using first criteria; and for each touch identified as an intentional touch, discriminating between a finger touch and a pen touch using second criteria, wherein discriminating between the finger touch and the pen test comprises identifying the touch as a pen touch if a distance between a touch and a profile of a previously identified intentional or unintentional touch is greater than a distance threshold. - View Dependent Claims (2, 3, 4, 5, 7)
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6. A method of determining a touch location on a touch surface of a touch panel comprising a matric of intersecting electrodes with nodes at intersections of the electrodes, the method comprising:
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discriminating between one or more intentional touches and one or more unintentional touches on the touch surface using first criteria; for each touch identified as an intentional touch, discriminating between a finger touch and a pen touch using second criteria; and re-identifying the pen touch as a finger touch if the pen touch was previously identified as a finger touch.
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8. A touch sensor, comprising:
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a touch panel having a touch surface and a matrix of electrodes with nodes at intersections of the electrodes; and a touch controller configured to discriminate between one or more intentional touches and one or more unintentional touches on the touch surface using first criteria; and for each touch identified as an intentional touch, discriminate between a finger touch and a pen touch using second criteria, wherein the controller is configured to re-identify the pen touch as a finger touch if the pen touch was previously identified as a finger touch. - View Dependent Claims (9, 10, 11, 13, 14)
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12. A touch sensor comprising:
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a touch panel having a touch surface and a matrix of electrodes with nodes at intersections of the electrodes; and a touch controller configured to; discriminate between one or more intentional touches and one or more unintentional touches on the touch surface using first criteria; and for each touch identified as an intentional touch, discriminate between a finger touch and a pen touch using second criteria, wherein the controller discriminates between the finger touch and the pen touch by identifying the touch as a pen touch if a distance between a touch and a profile of a previously identified intentional or unintentional touch is greater than a distance threshold.
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Specification