Electrostatic device having spaced electrodes
First Claim
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1. An electrostatic device comprising:
- a member having a proximal end and a distal end at opposing ends of an axis;
a first electrode positioned at the proximal end, the first electrode configured to electrostatically couple a principal signal to a sensor matrix of a computing device, such that an intensity of the principal signal that is sensed by the sensor matrix increases as the first electrode approaches the sensor matrix;
a drive circuit configured to generate the principal signal, the principal signal being an active signal; and
a second electrode positioned a spaced distance from the first electrode, the spaced distance configured to cause a designated capacitance between the first electrode and the second electrode to exceed a capacitance threshold and to cause the second electrode to electrostatically couple a secondary signal, which is based on the principal signal, to the sensor matrix as the first electrode is placed proximate the sensor matrix.
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Abstract
Devices are described herein that include spaced electrodes. In one example, a spaced distance between the electrodes may cause a capacitance between the electrodes to exceed a capacitance threshold. In another example, an impedance component (e.g., a resistor or a capacitor) may be coupled between the electrodes. In accordance with this example, the impedance component may provide an impedance that is less than an impedance threshold while causing an absolute difference between voltages that are induced by the respective electrodes to exceed a voltage threshold.
27 Citations
20 Claims
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1. An electrostatic device comprising:
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a member having a proximal end and a distal end at opposing ends of an axis; a first electrode positioned at the proximal end, the first electrode configured to electrostatically couple a principal signal to a sensor matrix of a computing device, such that an intensity of the principal signal that is sensed by the sensor matrix increases as the first electrode approaches the sensor matrix; a drive circuit configured to generate the principal signal, the principal signal being an active signal; and a second electrode positioned a spaced distance from the first electrode, the spaced distance configured to cause a designated capacitance between the first electrode and the second electrode to exceed a capacitance threshold and to cause the second electrode to electrostatically couple a secondary signal, which is based on the principal signal, to the sensor matrix as the first electrode is placed proximate the sensor matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electrostatic device comprising:
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a member having a proximal end and a distal end at opposing ends of an axis; a first electrode positioned at the proximal end, the first electrode configured to electrostatically couple a principal signal to a sensor matrix of a computing device, such that an intensity of the principal signal that is sensed by the sensor matrix increases as the first electrode approaches the sensor matrix, the principal signal inducing a first voltage that is measurable at the sensor matrix; a drive circuit configured to generate the principal signal, the principal signal being an active signal; a second electrode positioned a spaced distance from the first electrode, the second electrode configured to electrostatically couple a secondary signal, which is based on the principal signal, to the sensor matrix as the first electrode is placed proximate the sensor matrix, the secondary signal inducing a second voltage that is measurable at the sensor matrix; and an impedance component electrically connected between the first electrode and the second electrode, the impedance component configured to provide a designated impedance that is less than an impedance threshold while causing an absolute difference between the first voltage and the second voltage to exceed a voltage threshold. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An electrostatic device comprising:
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a member having a proximal end and a distal end at opposing ends of an axis; a first electrode positioned at the proximal end, the first electrode configured to electrostatically couple a principal signal to a sensor matrix of a computing device, such that an intensity of the principal signal that is sensed by the sensor matrix increases as the first electrode approaches the sensor matrix; a drive circuit configured to generate the principal signal, the principal signal being an active signal; and a plurality of second electrodes configured to electrostatically couple a plurality of respective secondary signals, which are based on the principal signal, to the sensor matrix as the first electrode is placed proximate the sensor matrix, each second electrode positioned a respective spaced distance from the first electrode, each spaced distance configured to cause a respective designated capacitance between the first electrode and the respective second electrode to exceed a capacitance threshold. - View Dependent Claims (17, 18, 19, 20)
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Specification