Methods and apparatus for performing capacitive touch sensing and proximity detection
First Claim
1. A method for performing capacitive touch sensing and proximity detection, the method comprising the steps of:
- storing an individual electrode baseline value for each individual electrode of a plurality of individual electrodes;
storing one proximity electrode baseline value for a proximity electrode that comprises multiples ones of the plurality of individual electrodes;
establishing a first connection with an individual electrode of the plurality of individual electrodes in order to receive one or more first signals indicating a state of the individual electrode;
performing a first analysis of the one or more first signals to determine whether to perform a first updating process for the individual electrode baseline value previously stored for the individual electrode;
establishing simultaneous second connections with the multiple ones of the plurality of individual electrodes that form the proximity electrode in order to receive one or more second signals indicating a state of the proximity electrode; and
performing a second analysis of the one or more second signals to determine whether to perform a second updating process for the proximity electrode baseline value previously stored for the proximity electrode, wherein the first analysis and the second analysis are different from each other.
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Abstract
Embodiments include methods and apparatus for performing capacitive touch sensing and proximity detection. Electrode selection circuitry establishes a first connection with an individual electrode of a plurality of individual electrodes in order to receive one or more first signals indicating a state of the individual electrode, and establishes second connections with a proximity electrode that comprises multiple ones of the plurality of individual electrodes in order to receive one or more second signals indicating a state of the proximity electrode. A processing system performs a first analysis on the first signals to determine whether to perform a first updating process for an individual electrode baseline value, and performs a second analysis on the second signals to determine whether to perform a second updating process for a proximity electrode baseline value. In an embodiment, the first analysis and the second analysis are different from each other.
27 Citations
20 Claims
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1. A method for performing capacitive touch sensing and proximity detection, the method comprising the steps of:
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storing an individual electrode baseline value for each individual electrode of a plurality of individual electrodes; storing one proximity electrode baseline value for a proximity electrode that comprises multiples ones of the plurality of individual electrodes; establishing a first connection with an individual electrode of the plurality of individual electrodes in order to receive one or more first signals indicating a state of the individual electrode; performing a first analysis of the one or more first signals to determine whether to perform a first updating process for the individual electrode baseline value previously stored for the individual electrode; establishing simultaneous second connections with the multiple ones of the plurality of individual electrodes that form the proximity electrode in order to receive one or more second signals indicating a state of the proximity electrode; and performing a second analysis of the one or more second signals to determine whether to perform a second updating process for the proximity electrode baseline value previously stored for the proximity electrode, wherein the first analysis and the second analysis are different from each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for performing capacitive touch sensing and proximity detection, the method comprising the steps of:
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storing an individual electrode baseline value for each individual electrode of a plurality of individual electrodes; storing one proximity electrode baseline value for a proximity electrode that comprises multiples ones of the plurality of individual electrodes; storing first charging parameters and first analysis parameters associated with performing first charging and sensing processes for an individual electrode of the plurality of individual electrodes; storing second charging parameters and second analysis parameters associated with performing second charging and sensing processes for the proximity electrode, wherein the first charging and sensing operations are configured differently from the second charging and sensing operations; establishing a first connection with the individual electrode; charging the individual electrode in accordance with the first charging parameters; receiving a first signal indicating a state of the individual electrode; determining, based on the first signal, whether to perform a first updating process for the individual electrode baseline value previously stored for the individual electrode by performing a first analysis that is constrained by the first analysis parameters; establishing simultaneous second connections with the multiple ones of the plurality of individual electrodes that form the proximity electrode; charging the proximity electrode in accordance with the second charging parameters; receiving a second signal indicating a state of the proximity electrode; and determining, based on the second signal, whether to perform a second updating process for proximity electrode baseline value previously stored for the proximity electrode by performing a second analysis that is constrained by the second analysis parameters. - View Dependent Claims (15, 16, 17)
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18. A capacitive touch and proximity sensor system comprising:
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data storage for storing an individual electrode baseline value for each individual electrode of a plurality of individual electrodes, and for storing one proximity electrode baseline value for a proximity electrode that comprises multiples ones of the plurality of individual electrodes; electrode selection circuitry configured to establish a first connection with an individual electrode of the plurality of individual electrodes in order to receive one or more first signals indicating a state of the individual electrode, and to establish second connections with a proximity electrode that comprises multiple ones of the plurality of individual electrodes in order to receive one or more second signals indicating a state of the proximity electrode; and a processing system, operatively coupled with the electrode selection circuitry, and configured to perform a first analysis of the one or more first signals to determine whether to perform a first updating process for the individual electrode baseline value previously stored for the individual electrode, and to perform a second analysis of the one or more second signals to determine whether to perform a second updating process for the proximity electrode baseline value previously stored for the proximity electrode, wherein the first analysis and the second analysis are different from each other. - View Dependent Claims (19, 20)
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Specification