Water Robustness and Detection On Capacitive Buttons
AssigneeMicrochip Technology Germany GmbH
InventorsAxel Heim, Joao Ferreira
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Abstract
A method for touch detection includes identifying a high-pass filtered sequence from a plurality of sensor measurements, accumulating a number of samples from a first high-pass filtered sequence into an accumulated value, comparing the first accumulated value against a threshold of accumulated values, and, based upon a determination whether the accumulated value is greater than the threshold of accumulated values, identify whether the sensor has been approached.
Claims26
At least one computer-readable medium containing instructions, the instructions, when loaded and executed by a processor, cause the processor to:
- identify a first high-pass filtered sequence from a plurality of sensor measurements;
- accumulate a plurality of samples from the first high-pass filtered sequence into a first accumulated value;
- compare the first accumulated value against a first threshold of accumulated values;
- and
- based upon a determination whether the first accumulated value is greater than the first threshold of accumulated values, identify whether the sensor has been approached.
An apparatus, comprising:
- a processor;
- and
- at least one computer-readable medium containing instructions, the instructions, when loaded and executed by a processor, cause the processor to:
- identify a first high-pass filtered sequence from a plurality of sensor measurements;
- accumulate a plurality of samples from the first high-pass filtered sequence into a first accumulated value;
- compare the first accumulated value against a first threshold of accumulated values;
- and
- based upon a determination whether the first accumulated value is greater than the first threshold of accumulated values, identify whether the sensor has been approached.
Dependencies are inferred from the claim text.