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US 2011/0216016 A1Published application
Touch Sensor With Active Baseline Tracking
AssigneePlantronics, Inc.
InventorDouglas K. Rosener
Life of this patent
Estimating the term…
Abstract
Methods and apparatuses for touch sensing are disclosed. In one example, both an inactive state baseline level and an active state baseline level are utilized.
Claims23
A method for determining sensor touch activity comprising:
- receiving a series of sensor signal values;
- determining a no touch inactive sensor state from the series of sensor signal values utilizing an inactive state baseline level;
- adjusting the inactive state baseline level responsive to the series of sensor signal values during the no touch inactive sensor state;
- determining an active sensor touch state from the series of sensor signal values utilizing the inactive state baseline level;
- establishing an active state baseline level during the active sensor touch state, where the active state baseline level is adjusted responsive to the sampled sensor signal values during the active sensor touch state;
- and
- determining a no touch inactive sensor state or an active sensor touch state from the series of sensor signal values utilizing the active state baseline level during the active sensor touch state.
4 more elements
A method for determining sensor touch activity comprising:
- sampling a series of sensor signal values;
- entering an active sensor touch state associated with user touch activity at a sensor;
- setting an active state baseline level during the active sensor touch state;
- adjusting the active state baseline level responsive to the series of sensor signal values to establish an adjusted active state baseline level;
- and
- determining a no touch inactive sensor state from the series of sensor signal values utilizing the adjusted active state baseline level.
3 more elements
A method for determining sensor touch activity comprising:
- receiving a series of sensor signal values;
- entering an active sensor touch state tracking mode associated with user touch activity at a sensor, wherein during the active sensor touch state tracking mode an active state baseline level is adjusted responsive to the series of sensor signal values;
- determining a no touch inactive sensor state from the series of sensor signal values utilizing the active state baseline level;
- and
- departing the active sensor touch state tracking mode and entering a normal tracking mode if the series of sensor signal values exceed a threshold noise level, wherein during normal tracking mode an inactive state baseline level is utilized to determine touch activity at the sensor.
2 more elements
A method for determining sensor touch activity comprising:
- receiving a series of sensor signal values;
- determining a no touch inactive sensor state from the series of sensor signal values utilizing a baseline level;
- adjusting the baseline level responsive to the series of sensor signal values;
- determining an active sensor touch state from the series of sensor signal values utilizing the baseline level;
- determining a stuck-on activity state;
- setting the baseline level to a current sampled sensor signal value responsive to determining the stuck-on activity state, wherein the baseline level is further adjusted using the sampled sensor signal values to produce an adjusted baseline level;
- setting a true-state variable to active responsive to determining the stuck-on activity state;
- setting the adjusted baseline level to a current sampled sensor signal value responsive to the series of sensor signal values exceeding a predetermined threshold;
- and
- setting the true-state variable to inactive responsive to the series of sensor signal values exceeding the predetermined threshold.
7 more elements
Dependencies are inferred from the claim text.