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US 10,095,341 B2Granted
Hybrid force measurement
AssigneeSynaptics Incorporated
InventorDerek Solven
Life of this patent
Estimating the term…
Abstract
Hybrid force sensing includes acquiring absolute capacitance measurements of the absolute capacitance of at least one frame side electrode, acquiring mutual capacitance measurements of the mutual capacitance between the at least one frame side electrode and at least one display side electrode. Hybrid force sensing further includes determining an absolute capacitance derived force from the absolute capacitance measurements, determining a mutual capacitance derived force from the mutual capacitance measurements, and combining the absolute capacitance derived force and the mutual capacitance derived force to obtain a combined force. Hybrid force sensing further includes performing an action based on the combined force.
Claims18
A method for hybrid force sensing comprising:
- acquiring a plurality of absolute capacitance measurements of an absolute capacitance of at least one frame side electrode disposed between a conductive frame and at least one display side electrode,
- wherein the at least one display side electrode is disposed between a display and the at least one frame side electrode,
- wherein acquiring the plurality of absolute capacitance measurements comprises modulating the at least one frame side electrode with a reference voltage and measuring the absolute capacitance of the at least one frame side electrode, and
- wherein the absolute capacitance is based on a distance of the at least one frame side electrode to the conductive frame;
- acquiring a plurality of mutual capacitance measurements of a mutual capacitance between the at least one frame side electrode and the at least one display side electrode;
- determining an absolute capacitance derived force from the plurality of absolute capacitance measurements;
- determining a mutual capacitance derived force from the plurality of mutual capacitance measurements;
- combining the absolute capacitance derived force and the mutual capacitance derived force to obtain a combined force;
- and
- performing an action based on the combined force.
7 more elements
An input device comprising:
- a display;
- a conductive frame;
- at least one frame side electrode;
- at least one display side electrode, wherein the at least one display side electrode is disposed between the display and the at least one frame side electrode, and wherein the at least one frame side electrode is disposed between the conductive frame and the at least one display side electrode;
- a first compressible layer, wherein the at least one display side electrode is interposed between the display and the first compressible layer;
- and
- a processing system that is configured to:
- acquire a plurality of absolute capacitance measurements of an absolute capacitance of at least one frame side electrode;
- acquire a plurality of mutual capacitance measurements of a mutual capacitance between the at least one frame side electrode and at least one display side electrode;
- determine an absolute capacitance derived force from the plurality of absolute capacitance measurements;
- determine a mutual capacitance derived force from the plurality of mutual capacitance measurements;
- combine the absolute capacitance derived force and the mutual capacitance derived force to obtain a combined force;
- and
- perform an action based on the combined force.
11 more elements
A processing system for hybrid force sensing comprising:
- sensor circuitry with functionality for:
- acquiring a plurality of absolute capacitance measurements of an absolute capacitance of at least one frame side electrode,
- wherein the at least one frame side electrode is disposed between a conductive frame and at least one display side electrode,
- wherein acquiring the plurality of absolute capacitance measurements comprises modulating the at least one frame side electrode with a reference voltage and measuring the absolute capacitance of the at least one frame side electrode, and
- wherein the absolute capacitance is based on a distance of the at least one frame side electrode to the conductive frame, and
- acquiring a plurality of mutual capacitance measurements of a mutual capacitance between the at least one frame side electrode and the at least one display side electrode, wherein the at least one display side electrode is disposed between a display and the at least one frame side electrode;
- and
- processing circuitry with functionality for:
- determining an absolute capacitance derived force from the plurality of absolute capacitance measurements,
- determining a mutual capacitance derived force from the plurality of mutual capacitance measurements,
- combining the absolute capacitance derived force and the mutual capacitance derived force to obtain a combined force, and
- performing an action based on the combined force.
9 more elements
Dependencies are inferred from the claim text.