Flexible capacitive sensor
First Claim
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1. A flexible capacitive sensing grid comprising:
- a flexible, resilient, dielectric layer having a first and a second side;
a first conductive layer on the first side of the dielectric layer comprising at least first and second conductive elements wherein the first conductive element is electrically isolated from second conductive element; and
, a second conductive layer on the second side of the dielectric layer comprising at least third and fourth conductive elements wherein the third conductive element is electrically isolated from the fourth conductive element and wherein the third element at least partially overlaps the first and second elements and the fourth element at least partially overlaps the first and second elements, and wherein the third and fourth elements are electrically separated from the first and second elements by the flexible, resilient, dielectric layer.
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Abstract
The invention relates to a flexible, resilient capacitive sensor suitable for large-scale manufacturing. The sensor comprises a dielectric, an electrically conductive layer on the first side of the dielectric layer, an electrically conductive layer on a second side of the dielectric layer, and a capacitance meter electrically connected to the two conductive layers to detect changes in capacitance upon application of a force to the detector. The conductive layers are configured to determine the position of the applied force. The sensor may be shielded to reduce the effects of outside interference.
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Citations
26 Claims
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1. A flexible capacitive sensing grid comprising:
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a flexible, resilient, dielectric layer having a first and a second side;
a first conductive layer on the first side of the dielectric layer comprising at least first and second conductive elements wherein the first conductive element is electrically isolated from second conductive element; and
,a second conductive layer on the second side of the dielectric layer comprising at least third and fourth conductive elements wherein the third conductive element is electrically isolated from the fourth conductive element and wherein the third element at least partially overlaps the first and second elements and the fourth element at least partially overlaps the first and second elements, and wherein the third and fourth elements are electrically separated from the first and second elements by the flexible, resilient, dielectric layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A flexible capacitive sensing grid comprising:
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a flexible, resilient, dielectric layer having a first and a second side;
a first conductive layer on the first side of the dielectric layer comprising at least first and second conductive elements wherein the first conductive element is electrically isolated from second conductive element;
a second conductive layer on the second side of the dielectric layer comprising at least a third conductive element;
a second resilient, dielectric layer attached on its first side to the second conductive layer; and
,a third conductive layer comprising at least fourth and fifth conductive elements on the second side of the second resilient dielectric layer, wherein the fourth conductive element is electrically isolated from fifth conductive element, and wherein the first, second, fourth and fifth conductive elements form a grid and the third conductive element is located at least where the first and second conductive elements overlap the fourth and fifth conductive elements. - View Dependent Claims (13)
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14. A flexible capacitive sensor comprising:
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a flexible, resilient, dielectric layer having a first and a second side;
a first conductive layer on the first side of the dielectric layer comprising at least one first conductive element;
a second conductive layer on the second side of the dielectric layer;
wherein the first conductive elements overlap at least partially the second conductive layer; and
,a capacitance meter electrically connected to the conductive elements, wherein the capacitance meter measures change in capacitance between the first conductive layer and the second conductive layer, and wherein the capacitance meter determines the position of a point of user interaction along the first conductive element of the first conductive layer. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification