Hybrid capacitive baseline management
First Claim
1. A method of managing baselines of a capacitive sensing input device, said method comprising:
- acquiring a transcapacitive baseline, a first absolute capacitive baseline, and a second absolute capacitive baseline with a plurality of sensor electrodes of the capacitive sensing input device;
acquiring a transcapacitive image with said plurality of sensor electrodes, a first absolute capacitive profile with a first subset of sensor electrodes of said plurality of sensor electrodes, and a second absolute capacitive profile with a second subset of sensor electrodes of said plurality of sensor electrodes, wherein sensor electrodes of said first subset are different from sensor electrodes of said second subset;
determining an absolute capacitive image as a function of said first absolute capacitive profile and said second absolute capacitive profile;
determining a hybrid capacitive image as a function of said absolute capacitive image and said transcapacitive image; and
managing said transcapacitive baseline, said first absolute capacitive baseline, and said second absolute capacitive baseline based on a value of at least one of said first absolute capacitive profile and said second absolute capacitive profile.
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Accused Products
Abstract
In a method of managing baselines of a capacitive sensing input device, a transcapacitive baseline, a first absolute capacitive baseline, and a second absolute capacitive baseline are acquired with a plurality of sensor electrodes of the capacitive sensing input device. A transcapacitive image, a first absolute capacitive profile, and a second absolute capacitive profile are acquired with the plurality of sensor electrodes. The transcapacitive baseline, the first absolute capacitive baseline, and the second absolute capacitive baseline are managed based on a value of at least one of the first absolute capacitive profile and the second absolute capacitive profile.
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Citations
18 Claims
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1. A method of managing baselines of a capacitive sensing input device, said method comprising:
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acquiring a transcapacitive baseline, a first absolute capacitive baseline, and a second absolute capacitive baseline with a plurality of sensor electrodes of the capacitive sensing input device; acquiring a transcapacitive image with said plurality of sensor electrodes, a first absolute capacitive profile with a first subset of sensor electrodes of said plurality of sensor electrodes, and a second absolute capacitive profile with a second subset of sensor electrodes of said plurality of sensor electrodes, wherein sensor electrodes of said first subset are different from sensor electrodes of said second subset; determining an absolute capacitive image as a function of said first absolute capacitive profile and said second absolute capacitive profile; determining a hybrid capacitive image as a function of said absolute capacitive image and said transcapacitive image; and managing said transcapacitive baseline, said first absolute capacitive baseline, and said second absolute capacitive baseline based on a value of at least one of said first absolute capacitive profile and said second absolute capacitive profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A processing system for a capacitive sensing input device, said processing system comprising:
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a sensor module configured to acquire transcapacitive resulting signals by transmitting with a first one of a plurality of sensor electrodes and receiving with a second one of said plurality of sensor electrodes and acquire absolute capacitive resulting signals by modulating and receiving with a first subset of sensor electrodes of said plurality of sensor electrodes that include said first one of said plurality of sensor electrodes and modulating and receiving with a second subset of sensor electrodes of said plurality of sensor electrodes that include said second one of said plurality of sensor electrodes, wherein sensor electrodes of said first subset are different from sensor electrodes of said second subset; a determination module configured to; determine a transcapacitive image from said transcapacitive resulting signals; and determine a first absolute capacitive profile and a second absolute capacitive profile from said absolute capacitive resulting signals; determine an absolute capacitive image as a function of said first absolute capacitive profile and said second absolute capacitive profile; determine a hybrid capacitive image as a function of said absolute capacitive image and said transcapacitive image; and a baseline management module configured to utilize said transcapacitive image, said first absolute capacitive profile, and said second absolute capacitive profile to manage a transcapacitive baseline associated with said capacitive sensing input device, a first absolute capacitive baseline associated with said capacitive sensing input device, and a second absolute capacitive baseline associated with said capacitive sensing input device. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A capacitive sensing input device, said capacitive sensing input device comprising:
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a plurality of sensor electrodes; and a processing system coupled with said plurality of sensor electrodes, said processing system configured to; acquire transcapacitive resulting signals by transmitting with a first one of said plurality of sensor electrodes and receiving with a second one of said plurality of sensor electrodes and acquire absolute capacitive resulting signals by modulating and receiving with a first subset of sensor electrodes of said plurality of sensor electrodes that include said first one of said plurality of sensor electrodes and modulating and receiving with a second subset of sensor electrodes of said plurality of sensor electrodes that include said second one of said plurality of sensor electrodes, wherein sensor electrodes of said first subset are different from sensor electrodes of said second subset; determine a transcapacitive image from said transcapacitive resulting signals; determine a first absolute capacitive profile and a second absolute capacitive profile from said absolute capacitive resulting signals; determine an absolute capacitive image as a function of said first absolute capacitive profile and said second absolute capacitive profile; determine a hybrid capacitive image as a function of said absolute capacitive image and said transcapacitive image; and utilize said transcapacitive image, said first absolute capacitive profile, and said second absolute capacitive profile to manage a transcapacitive baseline associated with said capacitive sensing input device, a first absolute capacitive baseline associated with said capacitive sensing input device, and a second absolute capacitive baseline associated with said capacitive sensing input device. - View Dependent Claims (16, 17, 18)
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Specification