Printed capacitive sensor
First Claim
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1. A flexible capacitive sensor comprising:
- a first flexible, resilient dielectric layer having a first and second side, wherein the first flexible, resilient dielectric layer comprises a foam;
an electrically conductive detector and trace layer on the first side of the first dielectric layer comprising at least 2 individually electrically addressed detectors and traces;
a first electrically conductive reference layer on the second side of the first dielectric layer that completely overlaps the detectors; and
,a capacitance meter electrically connected to each trace and the first conductive reference layer wherein the first conductive reference layer has a first voltage and the detector and trace layer has a second voltage, and wherein the first and second voltages have a difference of at least 0.1 volts.
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Abstract
The invention relates to a flexible, resilient capacitive sensor suitable for large-scale manufacturing. The sensor includes a dielectric, an electrically conductive detector and trace layer on the first side of the dielectric layer including a detector and trace, an electrically conductive reference layer on a second side of the dielectric layer, and a capacitance meter electrically connected to the trace and to the conductive reference layer to detect changes in capacitance upon interaction with detector. The sensor is shielded to reduce the effects of outside interference.
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Citations
9 Claims
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1. A flexible capacitive sensor comprising:
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a first flexible, resilient dielectric layer having a first and second side, wherein the first flexible, resilient dielectric layer comprises a foam; an electrically conductive detector and trace layer on the first side of the first dielectric layer comprising at least 2 individually electrically addressed detectors and traces; a first electrically conductive reference layer on the second side of the first dielectric layer that completely overlaps the detectors; and
,a capacitance meter electrically connected to each trace and the first conductive reference layer wherein the first conductive reference layer has a first voltage and the detector and trace layer has a second voltage, and wherein the first and second voltages have a difference of at least 0.1 volts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification