Touch distinction
First Claim
Patent Images
1. An electronic device comprising:
- a processor;
a memory coupled to the processor;
an interpolating force-sensing resistance (IFSR) touch sensor coupled to the processor;
an input module stored in the memory and configured to execute on the processor to;
detect a touch on the IFSR touch sensor;
determine a touch profile of the touch;
characterize, based at least in part upon the touch profile, the touch as a touch provided by a stylus or a touch provided by a finger;
cause the IFSR touch sensor to scan at a first scan rate and a first scan resolution at least partly in response to characterizing the touch as the stylus; and
cause the IFSR touch sensor to scan at a second scan rate and a second scan resolution at least partly in response to characterizing the touch as the finger, the second scan rate being lower than the first scan rate, the second scan resolution being less than the first scan resolution.
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Accused Products
Abstract
A force sensitive touch sensor is configured to distinguish objects touching the surface based on a touch profile. Magnetometers detect the presence, location, orientation, and angle of a stylus comprising a magnet. Presence of the magnetic field in conjunction with touches on the force sensitive touch sensor provides additional comparisons to distinguish whether a touch is from a human hand, a particular portion of a stylus, or other object.
189 Citations
23 Claims
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1. An electronic device comprising:
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a processor; a memory coupled to the processor; an interpolating force-sensing resistance (IFSR) touch sensor coupled to the processor; an input module stored in the memory and configured to execute on the processor to; detect a touch on the IFSR touch sensor; determine a touch profile of the touch; characterize, based at least in part upon the touch profile, the touch as a touch provided by a stylus or a touch provided by a finger; cause the IFSR touch sensor to scan at a first scan rate and a first scan resolution at least partly in response to characterizing the touch as the stylus; and cause the IFSR touch sensor to scan at a second scan rate and a second scan resolution at least partly in response to characterizing the touch as the finger, the second scan rate being lower than the first scan rate, the second scan resolution being less than the first scan resolution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device comprising:
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an interpolating force-sensing resistance (IFSR) touch sensor; and an input module configured to; detect a touch on the IFSR touch sensor; determine a touch profile of the touch; characterize, based at least in part upon the touch profile, the touch as a stylus touch or a non-stylus touch; cause the IFSR touch sensor to scan at a first scan rate and a first scan resolution at least partly in response to characterizing the touch as the stylus touch; and cause the IFSR touch sensor to scan at a second scan rate and a second scan resolution at least partly in response to characterizing the touch as the non-stylus touch, the second scan rate being lower than the first scan rate, the second scan resolution being less than the first scan resolution. - View Dependent Claims (10, 11, 21, 22)
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12. A device comprising:
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a touch sensor including sensels; and an input module configured to; detect a first touch on the touch sensor; at least partly in response to the first touch, designate an area on the touch sensor associated with the first touch; determine that a difference between a first force measured at a first sensel and a second force measured at a second sensel is greater than a threshold amount; characterize the first touch as a touch of a first type based at least in part on the difference being greater than the threshold amount; detect a second touch within the area; and apply, based on the second touch being detected within the area, a biasing factor to the second touch, the biasing factor increasing a likelihood that the second touch will be characterized as a touch of the first type; and characterize the second touch using the biasing factor. - View Dependent Claims (13, 14, 15, 16, 17, 18, 20, 23)
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19. A device comprising:
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a touch sensor including sensels; and an input module configured to; store a first touch detection threshold representing a threshold amount of force at which contact on the touch sensor is to be deemed a touch; detect an object contacting the touch sensor based at least in part on detecting a first force at a first sensel of the sensels; determine an amount of force on the touch sensor from the object contacting the touch sensor; determine that the amount of force is greater than the threshold amount of force; designate the contacting of the object on the touch sensor as a touch; detect motion of the touch on the touch sensor based at least in part on detection of a second force at a second sensel of the sensels and a reduction of the first force at the first sensel; modify the first touch detection threshold to a second touch detection threshold for the touch such that the threshold amount of force is at least one of increased or decreased during the motion of the touch on the touch sensor; and modify the second touch detection threshold to the first touch detection threshold or another touch detection threshold at least partly in response to cessation of the motion.
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Specification