Low-profile capacitive pointing stick
First Claim
1. An isometric input device configured to control a user interface indicator of an electronic device, the input device comprising:
- a plurality of sensor electrodes disposed on a sensor substrate;
a control member mechanically coupled to the sensor substrate over at least a portion of the plurality of sensor electrodes;
a conductive support substrate;
a compliant member disposed between the sensor substrate and the conductive support substrate;
a securing component extending through the conductive support substrate and the compliant member and engaging with the control member, the securing component defining a gap between the sensor substrate and the conductive support substrate, wherein the securing component comprises a single post extending through the conductive support substrate, through an aperture of the compliant member, and through the sensor substrate, and wherein the single post comprises a first portion larger in circumference than a second portion, the first portion of the single post disposed between the conductive support substrate and the sensor substrate and defining the gap between the sensor substrate and the conductive support substrate, the second portion of the single post engaging with the control member; and
wherein a force applied to the control member results in a change in the gap between the sensor substrate and the conductive support substrate, changing a variable capacitance between at least one sensor electrode of the plurality of sensor electrodes and the conductive support substrate.
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Accused Products
Abstract
In an example, an isometric input device configured to control a user interface indicator of an electronic device includes a plurality of sensor electrodes disposed on a sensor substrate. The input device further includes a control member mechanically coupled to the sensor substrate over at least a portion of the plurality of sensor electrodes. The input device further includes a conductive support substrate and a compliant member disposed between the sensor substrate and the conductive support substrate. The input device further includes a securing component extending through the conductive support substrate and the compliant member and engaging with the control member, the securing component defining a gap between the sensor substrate and the conductive support substrate.
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Citations
18 Claims
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1. An isometric input device configured to control a user interface indicator of an electronic device, the input device comprising:
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a plurality of sensor electrodes disposed on a sensor substrate; a control member mechanically coupled to the sensor substrate over at least a portion of the plurality of sensor electrodes; a conductive support substrate; a compliant member disposed between the sensor substrate and the conductive support substrate; a securing component extending through the conductive support substrate and the compliant member and engaging with the control member, the securing component defining a gap between the sensor substrate and the conductive support substrate, wherein the securing component comprises a single post extending through the conductive support substrate, through an aperture of the compliant member, and through the sensor substrate, and wherein the single post comprises a first portion larger in circumference than a second portion, the first portion of the single post disposed between the conductive support substrate and the sensor substrate and defining the gap between the sensor substrate and the conductive support substrate, the second portion of the single post engaging with the control member; and wherein a force applied to the control member results in a change in the gap between the sensor substrate and the conductive support substrate, changing a variable capacitance between at least one sensor electrode of the plurality of sensor electrodes and the conductive support substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A processing system for an input device configured to control a user interface indicator of an electronic device, the processing system comprising:
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a sensor module including sensor circuitry, the sensor module configured to operate a plurality of sensor electrodes by driving a sensing signal on a first subset of the plurality of electrodes and receiving resulting signals from a second subset of the plurality of electrodes, the plurality of sensor electrodes disposed on a dielectric layer of a sensor substrate, the dielectric layer disposed between the plurality of sensor electrodes and a conductive support substrate, the sensor substrate mechanically coupled to a control member, the resulting signals including effects from a change in spacing between the sensor substrate and the conductive support substrate caused by a deflection of the control member; and a determination module configured to measure a change in capacitive coupling between at least one ohmically isolated conductive element and the conductive support substrate based on the resulting signals, the at least one ohmically isolated conductive element disposed between the dielectric layer and the conductive support substrate. - View Dependent Claims (13, 14, 15, 16)
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17. A method of operating an input device configured to control a user interface indicator of an electronic device, the method comprising:
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operating a plurality of sensor electrodes by driving a sensing signal on a first subset of the plurality of electrodes and receiving resulting signals from a second subset of the plurality of electrodes, the plurality of sensor electrodes disposed on a dielectric layer of a sensor substrate, the dielectric layer disposed between the plurality of sensor electrodes and a conductive support substrate, the sensor substrate mechanically coupled to a control member, the resulting signals including effects from a change in spacing between the sensor substrate and the conductive support substrate caused by a deflection of the control member; and measuring a change in capacitive coupling between at least one ohmically isolated conductive element and the conductive support substrate based on the resulting signals, the at least one ohmically isolated conductive element disposed between the dielectric layer and the conductive support substrate. - View Dependent Claims (18)
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Specification