GRADIENT SENSORS

A capacitive sensing device for sensing a user input comprises a resistive sheet, a plurality of electrodes, at least one sensing node, and at least one charge integrator. The plurality of electrodes is disposed on a plurality of edge regions of the resistive sheet and configured for applying excita...

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Main Authors HARGREAVES KIRK, REYNOLDS JOSEPH K
Format Patent
LanguageEnglish
Published 12.11.2009
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Abstract A capacitive sensing device for sensing a user input comprises a resistive sheet, a plurality of electrodes, at least one sensing node, and at least one charge integrator. The plurality of electrodes is disposed on a plurality of edge regions of the resistive sheet and configured for applying excitation voltages to the resistive sheet such that a substantially steady state voltage gradient is established on the resistive sheet. At least one of the sensing nodes is disposed on at least one of the plurality of edge regions of the resistive sheet and configured for sensing a resulting charge on the resistive sheet after establishment of the substantially steady state voltage gradient and a cessation of application of the excitation voltages. At least one of the charge integrators is coupled to the at least one sensing node and configured for measuring the resulting charge to produce a measurement.
AbstractList A capacitive sensing device for sensing a user input comprises a resistive sheet, a plurality of electrodes, at least one sensing node, and at least one charge integrator. The plurality of electrodes is disposed on a plurality of edge regions of the resistive sheet and configured for applying excitation voltages to the resistive sheet such that a substantially steady state voltage gradient is established on the resistive sheet. At least one of the sensing nodes is disposed on at least one of the plurality of edge regions of the resistive sheet and configured for sensing a resulting charge on the resistive sheet after establishment of the substantially steady state voltage gradient and a cessation of application of the excitation voltages. At least one of the charge integrators is coupled to the at least one sensing node and configured for measuring the resulting charge to produce a measurement.
Author REYNOLDS JOSEPH K
HARGREAVES KIRK
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Snippet A capacitive sensing device for sensing a user input comprises a resistive sheet, a plurality of electrodes, at least one sensing node, and at least one charge...
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SubjectTerms CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
Title GRADIENT SENSORS
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